阅读说明：本技术 一种制砂方法、制砂系统以及制砂设备 (Sand making method, sand making system and sand making equipment ) 是由 郝天成 刘质 于 2021-07-16 设计创作，主要内容包括：本申请实施例提供一种制砂方法、制砂系统以及制砂设备,将待破碎物料破碎成已破碎物料,清洗已破碎物料得到合格砂。在破碎之后,对已破碎物料进行清洗,通过对已破碎物料进行清洗,使得已破碎物料中的分散泥从已破碎物料中分离出来,从而得到合格砂。由于分散泥已被分离,合格砂中泥含量较低,机制砂成品中主要为合格砂。因此,降低了机制砂成品中的泥含量,基本上能够满足机制砂成品中关于泥含量的要求。(The embodiment of the application provides a sand making method, a sand making system and sand making equipment, which are used for crushing a material to be crushed into a crushed material and cleaning the crushed material to obtain qualified sand. And after crushing, cleaning the crushed material, and separating dispersed mud in the crushed material from the crushed material by cleaning the crushed material so as to obtain qualified sand. Since the dispersed mud is separated, the mud content in the qualified sand is low, and the finished product of the machine-made sand is mainly qualified sand. Therefore, the mud content in the finished machine-made sand is reduced, and the requirements on the mud content in the finished machine-made sand can be basically met.)

1. A sand making method, comprising the steps of:

crushing: crushing a material to be crushed to form a crushed material;

cleaning after crushing: and cleaning the crushed material to obtain qualified sand.

2. A method of producing sand as claimed in claim 1 wherein cleaning the crushed material to produce qualified sand comprises: blowing an air flow to the crushed materials, and cleaning the crushed materials into first separated materials through the air flow, wherein the first separated materials comprise dispersed mud and qualified sand which are separated from each other.

3. A sand making method according to claim 2, wherein said first separated material further comprises a coarse material separated from said dispersed mud and said qualified sand, said coarse material having a particle size larger than that of said qualified sand; after the blowing of the gas flow to the crushed material, the sand making method further includes: and taking the coarse grain material as the material to be crushed and executing the crushing step until a preset condition is met, wherein the preset condition is that the ratio of the coarse grain material to the qualified sand is smaller than or equal to a preset ratio.

4. A method of producing sand as claimed in claim 2 wherein there are a plurality of said acceptable sand fractions, each of said acceptable sand fractions being separated from the remaining acceptable sand fractions; after the blowing of the gas flow to the crushed material, the sand making method further includes: and selecting part of qualified sand from all the qualified sand as the material to be crushed according to the grain size of the qualified sand, and performing crushing until a preset condition is met, wherein the preset condition is that the grain size distribution of the qualified sand meets a preset distribution.

5. A method of producing sand as claimed in claim 2 wherein said first separated material further comprises a coarse material having a particle size greater than that of said qualified sand, said qualified sand having a plurality of size fractions, each size fraction of qualified sand being separated from the remaining qualified sand; after the blowing of the gas flow to the crushed material, the sand making method further includes:

selecting part of qualified sand from all the qualified sand according to the grain size of the qualified sand;

taking the coarse-grained materials and/or the selected part of qualified sand as the materials to be crushed and executing the crushing step until preset conditions are met, wherein the preset conditions are as follows: the proportion of the coarse grain materials to the qualified sand is smaller than or equal to a preset proportion, and the grain size distribution of the qualified sand meets the preset distribution.

6. A sand making method as claimed in any one of claims 1 to 5, wherein before crushing the material to be crushed to form a crushed material, the sand making method further comprises: cleaning the raw material to obtain the material to be crushed.

7. A sand making method according to claim 6, wherein cleaning raw material to obtain the material to be crushed comprises: and blowing air flow to the raw material, and cleaning the raw material into a second separated material through the air flow, wherein the second separated material comprises dispersed mud and a material to be crushed which are separated from each other.

8. A sand making method as claimed in claim 7, wherein the separated material further comprises qualified sand separated from the dispersed mud and the material to be crushed.

9. A sand production system, comprising:

a crushing module configured to crush a material to be crushed to form a crushed material; and

and the after-crushing cleaning module is configured to clean the crushed material to obtain qualified sand.

10. A sand making system as claimed in claim 9 wherein the post-comminution cleaning module is configured to blast a gas stream against the comminuted material to clean the comminuted material into a first separated material comprising separated dispersed mud and qualified sand.

11. A sand making system according to claim 9 or 10, further comprising a pre-crushing cleaning module configured to clean raw material to obtain the material to be crushed.

12. A sand making system as claimed in claim 11, wherein the pre-comminution cleaning module is configured to blast an air stream into the raw material to clean the raw material into a second separated material comprising separated dispersed mud and material to be comminuted.

13. A sand making apparatus, comprising:

the crusher is configured to receive a material to be crushed and crush the material to be crushed to form a crushed material; and

the first cleaning machine is configured to receive the crushed materials and clean the crushed materials to obtain qualified sand.

14. The sand making apparatus of claim 13, wherein the first washer comprises:

a first cleaning container, configured with a first cleaning chamber, a first feed inlet, a first discharge outlet, a first cleaning separation port, and a first gas flow inlet, the first feed inlet, the first discharge outlet, the first cleaning separation port, and the first gas flow inlet all communicating with the first cleaning chamber, the first feed inlet configured to receive crushed material discharged by the crusher, the first discharge outlet located below the first feed inlet, the first gas flow inlet located between the first feed inlet and the first discharge outlet in an up-down direction; and

the first air flow generating device is provided with a first air supply port communicated with the first air flow inlet, and the first discharge port is positioned between the first air flow inlet and the first cleaning and separating port along the blowing direction of the first air flow generating device.

15. A sand making apparatus according to claim 14, wherein the first discharge port is plural in number, and plural first discharge ports are arranged in an air blowing direction of the first air flow generating device.

16. A sand making apparatus according to any one of claims 13 to 15, further comprising a secondary washer configured to receive and wash a feedstock to obtain the material to be crushed.

17. The sand making apparatus of claim 16, wherein the second washer comprises:

a second cleaning container, configured with a second cleaning cavity, a second feeding hole, a second discharging hole, a second cleaning separation hole, and a second airflow inlet, wherein the second feeding hole, the second discharging hole, the second cleaning separation hole, and the second airflow inlet are all communicated with the second cleaning cavity, the second feeding hole is configured to receive the raw material, the crusher is configured to receive the material discharged from the second discharging hole, the second discharging hole is located below the second feeding hole, and the second airflow inlet is located between the second feeding hole and the second discharging hole along the up-down direction; and

and the second air flow generating device is provided with a second air supply port communicated with the second air flow inlet, and the second discharge port is positioned between the first air flow inlet and the second cleaning and separating port along the blowing direction of the second air flow generating device.

Technical Field

The application relates to the technical field of sand making, in particular to a sand making method, a sand making system and sand making equipment.

Background

The mud content of the machine-made sand is a relatively important index in the machine-made sand. In a hardened concrete structure, the existence of the mud can block the bonding between set cement and aggregate, a weak area of the structure is easily formed, the strength of the concrete is reduced, and the elastic modulus is reduced, and on the other hand, the mud has fine particles, large integral surface area and no hydration, so that the mud absorbs a large amount of free water, and after the free water is evaporated, the volume of the mud is greatly reduced, so that a serious weak area is formed in the area where the mud exists in the concrete, the structural stability of the concrete is reduced, and the impermeability and the chloride ion permeability resistance are poor. Therefore, it is generally necessary in practice to control the content of mud in the machine-made sand within a certain range. However, in the related art, the prepared machine-made sand finished product has high mud content.

Disclosure of Invention

In view of the above, embodiments of the present application are intended to provide a sand making method, a sand making system, and a sand making apparatus, so as to reduce the content of mud in a finished machine-made sand product.

In order to achieve the above object, an aspect of the embodiments of the present application provides a sand making method, including the following steps:

crushing: crushing a material to be crushed to form a crushed material;

cleaning after crushing: and cleaning the crushed material to obtain qualified sand.

In one embodiment, cleaning the crushed material to obtain qualified sand comprises: blowing an air flow to the crushed materials, and cleaning the crushed materials into first separated materials through the air flow, wherein the first separated materials comprise dispersed mud and qualified sand which are separated from each other.

In one embodiment, the first separated material further comprises a coarse material separated from the dispersed mud and the qualified sand, and the particle size of the coarse material is larger than that of the qualified sand; after the blowing of the gas flow to the crushed material, the sand making method further includes: and taking the coarse grain material as the material to be crushed and executing the crushing step until a preset condition is met, wherein the preset condition is that the ratio of the coarse grain material to the qualified sand is smaller than or equal to a preset ratio.

In one embodiment, the qualified sand has multiple grain fractions, and the qualified sand of each grain fraction is separated from the rest qualified sand; after the blowing of the gas flow to the crushed material, the sand making method further includes: and selecting part of qualified sand from all the qualified sand as the material to be crushed according to the grain size of the qualified sand, and performing crushing until a preset condition is met, wherein the preset condition is that the grain size distribution of the qualified sand meets a preset distribution.

In one embodiment, the first separated material further comprises coarse-grained materials, the grain size of the coarse-grained materials is larger than that of the qualified sand, the qualified sand has multiple grain fractions, and the qualified sand of each grain fraction is separated from the rest qualified sand; after the blowing of the gas flow to the crushed material, the sand making method further includes:

selecting part of qualified sand from all the qualified sand according to the grain size of the qualified sand;

taking the coarse-grained materials and/or the selected part of qualified sand as the materials to be crushed and executing the crushing step until preset conditions are met, wherein the preset conditions are as follows: the proportion of the coarse grain materials to the qualified sand is smaller than or equal to a preset proportion, and the grain size distribution of the qualified sand meets the preset distribution.

In one embodiment, before the material to be crushed is crushed to form the crushed material, the sand making method further comprises: cleaning the raw material to obtain the material to be crushed.

In one embodiment, the cleaning of the raw material to obtain the material to be crushed comprises: and blowing air flow to the raw material, and cleaning the raw material into a second separated material through the air flow, wherein the second separated material comprises dispersed mud and a material to be crushed which are separated from each other.

In one embodiment, the separated material further comprises qualified sand separated from the dispersed mud and the material to be crushed.

A second aspect of embodiments of the present application provides a sand making system, including:

a crushing module configured to crush a material to be crushed to form a crushed material; and

and the after-crushing cleaning module is configured to clean the crushed material to obtain qualified sand.

In one embodiment, the post-crush cleaning module is configured to blast a gas stream against the crushed material to clean the crushed material into a first separated material comprising separated dispersed mud and qualified sand.

In an embodiment, the sand making system further comprises a pre-crushing cleaning module configured to clean the raw material to obtain the material to be crushed.

In an embodiment, the pre-crushing cleaning module is configured to blow an air flow towards the raw material to clean the raw material into a second separated material, the second separated material comprising separated dispersed mud and material to be crushed.

The third aspect of the embodiments of the present application provides a sand making equipment, including:

the crusher is configured to receive a material to be crushed and crush the material to be crushed to form a crushed material; and

the first cleaning machine is configured to receive the crushed materials and clean the crushed materials to obtain qualified sand.

In one embodiment, the first cleaning machine comprises:

a first cleaning container, configured with a first cleaning chamber, a first feed inlet, a first discharge outlet, a first cleaning separation port, and a first gas flow inlet, the first feed inlet, the first discharge outlet, the first cleaning separation port, and the first gas flow inlet all communicating with the first cleaning chamber, the first feed inlet configured to receive crushed material discharged by the crusher, the first discharge outlet located below the first feed inlet, the first gas flow inlet located between the first feed inlet and the first discharge outlet in an up-down direction; and

the first air flow generating device is provided with a first air supply port communicated with the first air flow inlet, and the first discharge port is positioned between the first air flow inlet and the first cleaning and separating port along the blowing direction of the first air flow generating device.

In an embodiment, the number of the first discharge ports is plural, and the plural first discharge ports are arranged along the airflow blowing direction of the first airflow generating device.

In an embodiment, the sand making apparatus further comprises a second cleaning machine configured to receive and clean the raw material to obtain the material to be crushed.

In one embodiment, the second cleaning machine comprises:

a second cleaning container, configured with a second cleaning cavity, a second feeding hole, a second discharging hole, a second cleaning separation hole, and a second airflow inlet, wherein the second feeding hole, the second discharging hole, the second cleaning separation hole, and the second airflow inlet are all communicated with the second cleaning cavity, the second feeding hole is configured to receive the raw material, the crusher is configured to receive the material discharged from the second discharging hole, the second discharging hole is located below the second feeding hole, and the second airflow inlet is located between the second feeding hole and the second discharging hole along the up-down direction; and

and the second air flow generating device is provided with a second air supply port communicated with the second air flow inlet, and the second discharge port is positioned between the first air flow inlet and the second cleaning and separating port along the blowing direction of the second air flow generating device.

According to the sand making method, after the materials are crushed, the crushed materials are cleaned, and the crushed materials are cleaned, so that dispersed mud in the crushed materials is separated from the crushed materials, and qualified sand is obtained. Since the dispersed mud is separated, the mud content in the qualified sand is low, and the finished product of the machine-made sand is mainly qualified sand. Therefore, the sand making method reduces the mud content in the finished machine-made sand product, and can basically meet the requirement on the mud content in the finished machine-made sand product.

Drawings

FIG. 1 is a flow chart of a sand making method according to an embodiment of the present application, illustrating that no qualified sand is separated during the crushing step;

FIG. 2 is a flow chart of a sand making method according to an embodiment of the present application, illustrating that qualified sand is separated during the crushing step;

FIG. 3 is a flow chart of a sand making method according to an embodiment of the present application, illustrating that no qualified sand is separated during the crushing step and qualified sand is separated during the cleaning step before crushing;

FIG. 4 is a flow chart of a sand making method according to an embodiment of the present application, illustrating that qualified sand is separated during the crushing step and qualified sand is separated during the cleaning step before crushing;

FIG. 5 is a schematic view of a sand production system according to an embodiment of the present application;

fig. 6 is a schematic view of a sand making apparatus according to an embodiment of the present application.

Description of reference numerals: a crusher 1; a first cleaning machine 2; a first cleaning vessel 21; the first cleaning chamber 211; a first feed port 212; a first discharge port 213; a first cleaning separation port 214; a first gas flow inlet 215; a first airflow generating device 22; a first gas supply port 221; a second cleaning machine 3; a second cleaning vessel 31; a second wash chamber 311; a second feed port 312; a second discharge port 313; a second cleaning separation port 314; a second airflow inlet 315; a second airflow generating device 32; the second gas supply port 321.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the embodiments of the present application, the "upper", "lower", "top", "bottom", orientation or positional relationship is based on the orientation or positional relationship shown in fig. 6. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

In the present embodiment, the aggregate is a granular loose material in concrete, and the granular loose material in concrete serves as a framework or a filling function. Wherein, the aggregate with the grain diameter larger than 4.75mm is coarse aggregate; the aggregate with the grain diameter less than or equal to 4.75mm is fine aggregate; particles with a particle size of less than 0.075mm are dispersed mud, where dispersed mud is a combination of fines, sludge, clay, and the like. Fine aggregate is commonly known as sand.

It is understood that the particle size distribution of the coarse aggregate, the fine aggregate, and the mud is not absolute, and can be adjusted to a suitable degree according to actual needs. Illustratively, the particle size value of the classified coarse aggregate and fine aggregate can be adaptively adjusted to about 4.75mm, and the particle size value of the classified mud can be adaptively adjusted to about 0.075 mm.

In the embodiment of the application, the mud blocks comprise coarse aggregate mud blocks and fine aggregate mud blocks, wherein the coarse aggregate mud blocks are particles with the particle size of more than 4.75mm before water washing and the particle size of less than 2.36mm after water washing and friction; the fine aggregate mud block is particles with the particle size of more than 1.18mm before water washing and less than 0.6mm after water washing and friction.

It is understood that the values of the particle diameters of the coarse aggregate clods and the fine aggregate clods are not absolute, and can be adjusted to be fine according to actual needs. Illustratively, the particle size value of the coarse aggregate mud block before water immersion can be adaptively adjusted to be about 4.75mm, and the particle size value of the coarse aggregate mud block after water immersion and friction can be adaptively adjusted to be about 2.36 mm; the particle size value of the fine aggregate mud block before water immersion can be adaptively adjusted to be about 1.18mm, and the particle size value of the fine aggregate mud block after water immersion and friction can be adaptively adjusted to be about 0.6 mm.

It should be noted that the aggregate may also comprise separate mud pieces, i.e. the whole mud piece is mud and no aggregate.

In the examples of the present application, the dispersed mud includes mud existing in the aggregate before washing, mud peeled from the aggregate after washing, and mud obtained by washing and dispersing mud lumps.

It should be noted that in the present embodiment, "peeling" and "separation" are two different concepts, and that peeling one material from another means that the two materials are not bonded together, but the two materials may still be mixed together and not separated. The separation of one material from the other means that the two materials are not mixed together.

Before describing the embodiments of the present application, it is necessary to analyze the reason why the content of mud in the finished machine-made sand is high in the related art, and obtain the technical solution of the embodiments of the present application through reasonable analysis.

In the related art, the material for making the sand is crushed into the crushed material, and the crushed material is usually directly sieved to obtain a finished product of machine-made sand without cleaning the crushed material. Before the materials are not crushed, the existing state of mud in the materials for making sand is various. Some of the mud is dispersed mud; some of the mud is coated on the outer surface of the particles, for example, the mud is coated on the outer surface of the aggregate; the mud is a mud block; some of the mud is then embedded with particulate matter, for example, the mud is embedded with aggregate. The mud wrapped around the outer surface of the particles, and embedded with the particles, is often difficult to peel off the particles and to clean before breaking. After the materials for manufacturing the sand are crushed, most of mud which is difficult to separate in the raw materials is crushed and stripped from particles, mud blocks are crushed to be finer, the mud is mixed in the crushed materials after being crushed, the content of the mud in the crushed materials is higher, and correspondingly, a finished product of machine-made sand obtained by screening the crushed materials also has higher content of the mud, so that the mud content of the finished product of the machine-made sand cannot meet the qualified requirement. The crushed materials are usually mixed with dispersed mud, and the dispersed mud can be separated by cleaning, if the crushed materials can be cleaned, the dispersed mud is separated from the crushed materials, the mud content in the crushed materials can be reduced, and the purpose of reducing the mud content in the machine-made sand finished product is achieved.

In view of this, an embodiment of the present application provides a sand making method, please refer to fig. 1 to 4, the sand making method includes the following steps:

crushing: crushing a material to be crushed to form a crushed material;

cleaning after crushing: and cleaning the crushed material to obtain qualified sand.

So, after the breakage, wash broken material, through washing broken material for dispersed mud in the broken material separates from broken material, thereby obtains qualified sand. Since the dispersed mud is separated, the mud content in the qualified sand is low, and the finished product of the machine-made sand is mainly qualified sand. Therefore, the sand making method reduces the mud content in the finished machine-made sand product, and can basically meet the requirement on the mud content in the finished machine-made sand product.

In one embodiment, referring to fig. 1 to 4, before the material to be crushed is crushed to form the crushed material, the sand making method further includes: the raw material is washed to obtain the material to be crushed. So, treat broken material and carry out the breakage before, wash the raw materials earlier, can wash partial dispersion mud in the raw materials, alleviateed abluent work burden after garrulous, the dispersion mud that washs does not get into crushing step and carries out the breakage, has alleviateed the work burden of crushing step.

It should be noted that, in the related art, the production process of the machine-made sand generally includes coarse crushing, intermediate crushing and fine crushing of the starting material. In one embodiment, the material used for cleaning to obtain the material to be crushed is typically the material after the initial material has been crushed.

In one embodiment, the step of washing the material to obtain the material to be crushed may also be referred to as a pre-crushing washing step.

In one embodiment, the raw material may be cleaned by wet cleaning. For example, water washing.

In one embodiment, the feedstock may be cleaned by dry cleaning. Thus, the dry cleaning can reduce the adhesiveness of the dispersed mud, can clean the dispersed mud left on the aggregate more thoroughly, and improve the cleaning effect of the aggregate, so that the dry cleaning can better clean the dispersed mud in the raw materials.

In one embodiment, the dry purge may be an air purge.

In one embodiment, when the material is cleaned by dry cleaning, the water in the material may be properly dried before cleaning the material.

In one embodiment, the cleaning of the raw material to obtain the material to be crushed comprises: and blowing air flow to the raw materials, and cleaning the raw materials into second separated materials through the air flow, wherein the second separated materials comprise dispersed mud and materials to be crushed, which are separated from each other. So, through to raw materials jetting air current, separate into dispersion mud and the material of treating broken with the raw materials to through the air current with the dispersion mud in the raw materials wash away.

In one embodiment, referring to fig. 3 and 4, the second separated material further includes qualified sand separated from the dispersed mud and the material to be crushed. So, through to raw materials jetting air current, separate into the raw materials dispersion mud, treat broken material and qualified sand, the qualified sand that separates out in the follow raw materials can no longer be broken, also need not wash once more, has alleviateed the work burden of subsequent broken step and garrulous after-cleaning step.

In one embodiment, the post-crushing cleaning may be a wet cleaning. For example, water washing.

In one embodiment, the post-crush cleaning may be a dry cleaning. Thus, the dry cleaning can reduce the adhesion of the dispersed mud, can clean the dispersed mud left on the aggregate more thoroughly, and improve the cleaning effect of the aggregate, so that the dry cleaning can better clean the dispersed mud in the crushed material.

In one embodiment, when the crushed material is cleaned by dry cleaning, the water in the crushed material may be dried properly before cleaning the crushed material.

In one embodiment, cleaning the crushed material to obtain qualified sand comprises: and spraying air flow to the crushed materials, and cleaning the crushed materials into first separated materials through the air flow, wherein the first separated materials comprise dispersed mud and qualified sand which are separated from each other. Thus, by blowing the air current to the crushed material, the dispersed mud in the crushed material is separated from the crushed material by the air current, so that the dispersed mud in the crushed material is washed away by the air current.

In one embodiment, the first separated material further comprises a coarse material separated from the dispersed mud and the qualified sand, and the particle size of the coarse material is larger than that of the qualified sand.

It will be appreciated that coarse material is generally an undesirable material, the particle size of which does not meet the requirements of the finished machine-made sand, and the proportion of coarse material needs to be controlled appropriately. In one embodiment, referring to fig. 1 to 4, after injecting the blowing gas flow to the crushed material, the sand making method further includes: and taking the coarse grain material as the material to be crushed and executing the crushing step until a preset condition is met, wherein the preset condition is that the ratio of the coarse grain material to the qualified sand is smaller than or equal to a preset ratio. Thus, by crushing the coarse material again, the amount of the coarse material is reduced, thereby reducing the ratio of the coarse material to the qualified sand, and so on until the ratio is less than the preset ratio.

It should be noted that the preset proportion can be set according to actual conditions, and a small amount of coarse-grained materials can be allowed in the finished machine-made sand product besides qualified sand.

It will be appreciated that it is most desirable that the coarse material is completely consumed after a number of cycles.

In one embodiment, the ratio of coarse material to acceptable material may be a mass ratio.

In one embodiment, the ratio of coarse material to acceptable material may be a volume ratio.

In an embodiment, the particle size of the material to be crushed may not be too large, and the first separated material may not comprise coarse material.

It can be understood that the requirements for qualified sand are different according to the actual requirements of the finished machine-made sand product. In one embodiment, all of the qualified sand may have only one size fraction, or the qualified sand of different size fractions may be separated from each other.

It should be noted that the size fraction refers to a range of sizes of sand, and the sands of different sizes are mixed with each other in the qualified sand of a certain size fraction without separation. Illustratively, the qualified sand of a certain size fraction may have a particle size ranging from 2mm to 4mm, the qualified sand of a certain size fraction may have a particle size ranging from 2mm to 3mm, and the qualified sand of a certain size fraction may have a particle size ranging from 3mm to 4 mm.

In one embodiment, the acceptable sand obtained by blasting a gas stream against the crushed material may have only one size fraction.

In one embodiment, the method includes separating a plurality of fractions of qualified sand from the crushed material by blowing an air stream into the crushed material, wherein each fraction of qualified sand is separated from the remaining fraction of qualified sand.

It will be appreciated that the distribution of acceptable sand in different size fractions may need to be adjusted, for example, to reduce the amount of acceptable sand in a coarser size fraction, depending on the actual demand of the finished machine sand product. In one embodiment, after the blowing of the gas stream to the crushed material, the sand making method further comprises: and selecting part of qualified sand from all the qualified sand as a material to be crushed according to the grain size of the qualified sand, and performing crushing until a preset condition is met, wherein the preset condition is that the grain size distribution of the qualified sand meets a preset distribution. Therefore, part of qualified sand is selected according to the size fraction of the qualified sand and is crushed again, so that the amount of the qualified sand of different size fractions is changed, the operation is circulated until the preset condition is met, and the distribution of the qualified sand of different size fractions is adjusted.

In one example, the crushed material was separated into A, B, C acceptable sands of three different size fractions. The grain size of the qualified sand A, the qualified sand B and the qualified sand C is reduced in sequence. When the content of the qualified sand A is high, part of the qualified sand A can be selected to be crushed again to obtain qualified sand B and/or qualified sand C, so that part of the qualified sand A is consumed, the content of the qualified sand B and/or the qualified sand C is increased, and the distribution condition of the qualified sand of different grain grades is adjusted.

It will be appreciated that in practice it may be necessary to adjust both the proportion of coarse material and the distribution of acceptable sand at different particle sizes. In one embodiment, after the blowing of the gas stream to the crushed material, the sand making method further comprises:

selecting part of qualified sand from all the qualified sand according to the grain size of the qualified sand;

taking the coarse-grained materials and/or the selected part of qualified sand as materials to be crushed and executing the crushing step until preset conditions are met, wherein the preset conditions are as follows: the proportion of the coarse-grained materials to the qualified sand is smaller than or equal to a preset proportion, and the grain size distribution of the qualified sand meets the preset distribution.

So, through carrying out the breakage once more with the qualified sand of coarse grain material and/or part of choosing, so circulate until satisfying the preset condition to reach the proportion of both adjusting the coarse grain material, the purpose of adjusting the qualified sand of different size grades again.

In one embodiment, the sand making method further comprises: part of the qualified sand is separated during the execution of the crushing step. Thus, the production capacity of the machine-made sand can be improved to a certain extent.

In one embodiment, the material to be crushed is crushed by the crusher 1, and during the crushing step, part of the qualified sand is separated from the material in the crusher 1, and the separated part of the qualified sand is discharged out of the crusher 1. Therefore, qualified sand in the crusher 1 is discharged in time, and the qualified sand can be prevented from being further crushed into fine powder with the particle size smaller than that of the sand by the crusher 1.

An embodiment of the present application provides a sand making system, please refer to fig. 5, which includes a crushing module and a cleaning module after crushing. The crushing module is configured to crush material to be crushed into crushed material. The post-crush cleaning module is configured to clean crushed material to obtain qualified sand. So, utilize crushing module will treat broken material breakage, wash the broken material that forms after the breakage through garrulous back cleaning module to wash the dispersion mud in the broken material, obtain the lower qualified sand of mud content, machine-made sand finished product is mainly qualified sand. Thereby achieving the purpose of reducing the mud content in the finished machine-made sand product.

In one embodiment, the post-crush cleaning module is configured to blast a gas stream against the crushed material to clean the crushed material into a first separated material comprising separated dispersed mud and qualified sand. Thus, the air flow is sprayed to the crushed materials through the cleaning module after crushing, so that the crushed materials are cleaned in a dry mode.

In one embodiment, referring to fig. 5, the sand making system further comprises a pre-crushing cleaning module configured to clean the raw material to obtain the material to be crushed. So, wash the module through garrulous preceding washing and wash the raw materials to wash away the dispersion mud in the raw materials.

In one embodiment, the pre-crushing cleaning module is configured to blow an air stream towards the raw material to clean the raw material into a second separated material, the second separated material comprising dispersed mud and material to be crushed separated from each other. Therefore, the air flow is blown to the raw material through the cleaning module before crushing, and the dry cleaning of the raw material is realized.

In one embodiment, the crushing module is configured to separate a portion of the qualified sand during the crushing step.

Referring to fig. 6, the sand making apparatus includes a crusher 1 and a first cleaning machine 2. The crusher 1 is configured to receive material to be crushed and to crush the material to be crushed to form crushed material. The first washer 2 is configured to receive the crushed material and to wash the crushed material to yield qualified sand. Like this structural style, receive through breaker 1 and treat broken material and carry out the breakage, treat that broken material is broken into broken material through breaker 1, broken material is received and is carried out garrulous after-cleaning through first cleaning machine 2 to wash the dispersion mud in the broken material, the content of mud is less in the qualified sand that obtains after the washing, and machine-made sand finished product is mainly qualified sand. Therefore, the mud content in the machine-made sand finished product is reduced through the sand making equipment provided by the embodiment of the application. The mud content in the finished machine-made sand basically can meet the corresponding requirements.

In one embodiment, referring to fig. 6, the first washer 2 receives crushed material discharged from the crusher 1.

In an embodiment, the first washing machine 2 is connected to the crusher 1 to receive crushed material discharged from the crusher 1.

In an embodiment the crusher 1 has a third discharge opening for discharging crushed material out of the crusher 1, and the first washer 2 has a first feed opening 212, the third discharge opening being in pipe connection with the first feed opening 212. With such a structure, the crushed materials in the crusher 1 are discharged through the third discharge hole and enter the first cleaning machine 2 through the first feed hole 212 through the pipeline between the third discharge hole and the first feed hole 212.

In one embodiment, the first cleaning machine 2 may be a wet cleaning machine. Such as a water washer.

In one embodiment, the first cleaning machine 2 is a dry cleaning machine. Such as a jet washer.

In an embodiment, referring to fig. 6, the first cleaning machine 2 includes a first cleaning container 21 and a first airflow generating device 22, the first cleaning container 21 is configured with a first cleaning cavity 211, a first feeding hole 212, a first discharging hole 213, a first cleaning separation hole 214 and a first airflow inlet 215, the first feeding hole 212, the first discharging hole 213, the first cleaning separation hole 214 and the first airflow inlet 215 are all communicated with the first cleaning cavity 211, the first feeding hole 212 is configured to receive crushed materials discharged by the crusher 1, the first discharging hole 213 is located below the first feeding hole 212, and the first airflow inlet 215 is located between the first feeding hole 212 and the first discharging hole 213 along the up-down direction. The first air flow generating device 22 has a first air supply port 221 communicating with the first air flow inlet 215, and the first discharge port 213 is located between the first air flow inlet 215 and the first cleaning and separating port 214 in the blowing direction of the first air flow device. According to the structure, the crushed materials enter the first cleaning cavity 211 of the first cleaning machine 2 through the first feeding hole 212 and fall down under the action of gravity, the first airflow generating device 22 blows airflow to the first cleaning cavity 211 to clean the crushed materials in the falling process of the crushed materials, the weight of dispersed mud in the crushed materials is lightest, the dispersed mud is discharged out of the first cleaning machine 2 through the first cleaning separation port 214 under the blowing action of the airflow, and qualified sand is discharged out of the first cleaning machine 2 from the first discharging hole 213. The first airflow generating device 22 generates airflow to blow the crushed materials, so that dispersed mud and qualified sand which are separated from each other are obtained, and dry cleaning of the crushed materials is realized.

In one embodiment, the number of the first discharging holes 213 may be one or more.

In one embodiment, the plurality of first discharging holes 213 are arranged along the blowing direction of the first airflow generating device 22. In this way, each of the first discharge ports 213 discharges particles of one size fraction, and the size fractions of the particles discharged from any two of the first discharge ports 213 are different.

It should be noted that, with reference to fig. 6, the direction of blowing of the air flow by the first air flow generating device 22 is the direction indicated by the arrow R in fig. 6.

In an embodiment, referring to fig. 6, the number of the first discharge ports 213 is two, the material discharged from the first discharge port 213 close to the first airflow generating device 22 along the blowing direction of the first airflow generating device 22 is coarse material, and the material discharged from the first discharge port 213 far from the first airflow generating device 22 along the blowing direction of the first airflow generating device 22 is qualified sand.

In an embodiment, the number of the first discharging holes 213 may be three, five or more, and a plurality of the first discharging holes 213 are arranged along the airflow blowing direction of the first airflow generating device 22. With such a structure, qualified sand of different size fractions can be obtained through the plurality of first discharge holes 213.

In one embodiment, the crusher 1 comprises a crusher body and a screen deck connected to each other, wherein the material to be crushed enters the crusher body for crushing, and the screen deck is configured to screen the material being crushed in the crusher body to separate out part of the qualified sand. And discharging the separated qualified sand from the crusher main body. Like this structural style, treat at breaker 1 and carry out the in-process broken material, sieve by broken material in with the breaker main part through the sieve to isolate partial qualified sand, discharge the breaker main part side by side, thereby avoid the qualified sand in the breaker main part to further be broken into the farine that is less than the sand.

In one embodiment, the qualified sand separated by the crusher 1 is not sent to the first cleaning machine 2 for cleaning.

In an embodiment, referring to fig. 6, the sand making apparatus further comprises a second cleaning machine 3, and the second cleaning machine 3 is configured to receive and clean the raw material to obtain the material to be crushed. Structural style like this, before the breakage, wash the raw materials through second cleaning machine 3 and wash away with the dispersion mud in the raw materials, can make the work burden that first cleaning machine 2 washed out dispersion mud after the breakage alleviate.

It should be noted that the material to be crushed obtained by cleaning the raw material enters the crusher 1 to be crushed.

In an embodiment, the crusher 1 has a third feed opening for receiving material to be crushed, and the material to be crushed obtained by cleaning the raw material is discharged from the second cleaning machine 3 through the third feed opening of the crusher 1 and enters the crusher 1 for crushing.

In one embodiment, the coarse-grained material and/or the selected part of the qualified sand are/is used as the material to be crushed to return to the crusher 1 for crushing, and the coarse-grained material and/or the selected part of the qualified sand return to the crusher 1 for crushing through a third feeding port of the crusher 1.

In one embodiment, referring to fig. 6, the second cleaning machine 3 includes a second cleaning container 31 and a second airflow generating device 32. The second cleaning container 31 is configured with a second cleaning cavity 311, a second feeding hole 312, a second discharging hole 313, a second cleaning separation hole 314 and a second airflow inlet 315, wherein the second feeding hole 312, the second discharging hole 313, the second cleaning separation hole 314 and the second airflow inlet 315 are all communicated with the second cleaning cavity 311, the second feeding hole 312 is configured to receive raw materials, the crusher 1 is configured to receive materials discharged from the second discharging hole 313, the second discharging hole 313 is located above the second feeding hole 312, and the second airflow inlet 315 is located between the second feeding hole 312 and the second discharging hole 313 along the up-down direction. The second air flow generating device 32 has a second air supply port 321 communicating with the second air flow inlet 315, and the second discharge port 313 is located between the first air flow inlet 215 and the second cleaning and separating port 314 along the blowing direction of the second air flow generating device 32. According to the structure, the raw material enters the second cleaning cavity 311 of the second cleaning machine 3 from the second feeding hole 312, the raw material in the second cleaning cavity 311 drops downwards under the action of gravity, the second airflow generating device 32 blows airflow to the second cleaning cavity 311, the falling raw material is cleaned through the airflow blown by the second airflow device, the light dispersed mud is discharged out of the second cleaning machine 3 from the second cleaning separation hole 314 under the action of airflow blowing, and the material to be crushed is discharged out of the second cleaning machine 3 from the second discharging hole 313. The second airflow generating device 32 generates airflow to blow the raw material, so that dispersed mud and the material to be crushed which are separated from each other are obtained, and dry cleaning of the raw material is realized.

In an embodiment, the number of the second discharge holes 313 may be one. After the dispersed mud is separated from the raw material by the blowing air flow, the remaining raw material acts on the material to be crushed and is discharged from the second discharge port 313.

In an embodiment, the number of the second discharging holes 313 may be multiple, and the multiple second discharging holes 313 are arranged along the airflow blowing direction of the second airflow generating device 32. In this configuration, each second discharge port 313 discharges particles of one size fraction, and the size fractions of the particles discharged from any two second discharge ports 313 are different.

In an embodiment, the material discharged from the plurality of second discharge holes 313 may be received by the crusher 1.

Referring to fig. 6, the direction in which the second airflow generating device 32 blows the airflow is indicated by an arrow R in fig. 6.

In one embodiment, referring to fig. 6, the blowing direction of the first airflow generating device 22 is the same as the blowing direction of the second airflow generating device 32.

In an embodiment, the number of the second discharging holes 313 is multiple, and the multiple second discharging holes 313 are arranged along the airflow blowing direction of the second airflow generating device 32. Along the airflow blowing direction of the second airflow generating device 32, the second discharge port 313 closest to the second airflow generating device 32 is a port to be crushed, the crusher 1 is configured to receive the material discharged from the port to be crushed, and the rest of the second discharge ports 313 are communicated with the outside of the crusher 1. Structural style like this, the great needs of the great particle diameter of the material of second discharge gate 313 discharge nearest second air current generating device 32 are broken, the second discharge gate 313 nearest second air current generating device 32 is for treating broken mouthful, treat that broken mouthful exhaust material is promptly for treating broken material, remaining second discharge gate 313 exhaust material is qualified sand, qualified sand need not be broken again, remaining second discharge gate 313 and breaker 1 outside intercommunication for remaining second discharge gate 313 exhaust qualified sand no longer gets into breaker 1 and breaks.

In an embodiment, referring to fig. 6, the number of the second discharge ports 313 is two, the two second discharge ports 313 are arranged along the airflow blowing direction of the second airflow generating device 32, and the materials discharged from the two second discharge ports 313 are used as the materials to be crushed and enter the crusher 1 through the third feed port of the crusher 1.

In an embodiment, the number of the second discharge ports 313 is two, the two second discharge ports 313 are arranged along the airflow blowing direction of the second airflow generating device 32, the second discharge port 313 close to the second airflow generating device 32 is a port to be crushed, the crusher 1 is configured to receive the material discharged from the port to be crushed, the second discharge port 313 far from the second airflow generating device 32 is a material passing port, and the crusher 1 does not receive the material discharged from the material passing port. In this way, the opening to be crushed is close to the second airflow generating device 32, the discharged particles are large, and need to enter the crusher 1 for further crushing, and the material to be crushed is usually the material discharged from the opening to be crushed. The qualified material port is far away from the second airflow generation device 32, the discharged particles are less, the material discharged from the qualified material port is qualified sand, and the qualified sand can not enter the crusher 1 to be crushed any more.

In one embodiment, the opening to be crushed is connected to the third feed opening of the crusher 1 via a pipe. The second cleaning machine 3 discharges qualified sand to the outside of the crusher 1 through a qualified material port, and does not enter the crusher 1 to crush.

In one embodiment, referring to fig. 6, the crusher 1 is located above the first cleaning machine 2, and the second cleaning machine 3 is located above the crusher 1. With the structure, materials can be conveniently conveyed among the second cleaning machine 3, the crusher 1 and the first cleaning machine 2 by using the gravity of the materials.

It is to be understood that the up-down positional relationship of the first washer 2, the second washer 3, and the crusher 1 is not limited to the positional relationship shown in fig. 6. The up-down position relationship of the first cleaning machine 2, the second cleaning machine 3 and the crusher 1 can be set according to actual needs.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.