阅读说明：本技术 一种干法辊压机的制砂生产工艺 (Sand making production process of dry-method roller press ) 是由 杨运猛 刘晓磊 叶诗豪 崔杨 于 2020-12-25 设计创作，主要内容包括：本发明公开了一种干法辊压机的制砂生产工艺,涉及制砂工艺领域,包括第一次破碎工序、第二次破碎工序、第一次筛分工序、循环工序、制砂工序、脱粉工序、第二次筛分工序、循环工序。本发明的有益效果为：本发明兼具传统干法制砂生产的优点,大大提高了制砂量和制砂的产品品质,同时做到环保清洁；本发明比传统工艺能耗低,环保,制砂产量大,置更适应市场。(The invention discloses a sand making production process of a dry-method roller press, which relates to the field of sand making processes and comprises a first crushing process, a second crushing process, a first screening process, a circulating process, a sand making process, a powder removing process, a second screening process and a circulating process. The invention has the beneficial effects that: the method has the advantages of the traditional dry-method sand making production, greatly improves the sand making quantity and the product quality of the sand making, and simultaneously achieves environmental protection and cleanness; compared with the traditional process, the invention has the advantages of low energy consumption, environmental protection, large sand production yield and more suitability for the market.)

1. A sand making production process of a dry-method roller press is characterized by comprising the following steps: the method comprises the following steps:

step one, a first crushing procedure: crushing the ore by primary crushing equipment to obtain a crushed product a;

step two, a second crushing procedure: crushing the product a obtained in the step one by secondary crushing equipment to obtain a product b after secondary crushing;

step three, a first screening process: screening the product b obtained in the step two through a primary screening device to obtain a product c3 at the upper layer, a product c2 at the middle layer and a product c1 at the lower layer of the primary screening device respectively;

step four, a circulating procedure: returning the product c3 obtained in the step three to the step two and pouring the product c3 into the secondary crushing equipment;

step five, a sand making process: preparing sand from the product c2 obtained in the step three through sand preparation equipment to obtain a product d;

step six, a powder removing procedure: combining the product d obtained in the fifth step and the product c1 obtained in the third step, and carrying out powder removal through powder removal equipment to obtain products e1 and e2, wherein the diameter of e2 is larger than that of e 1;

step seven, the second screening process: screening the product e2 obtained in the sixth step through secondary screening equipment to obtain products f1, f2 and f3 with diameters sequentially increased, and combining the product e1 obtained in the sixth step with the product f 1;

step eight, a circulating procedure: the product f3 from step seven was returned to step five and poured into the sand making equipment.

2. The sand making production process of the dry-method roller press according to claim 1, characterized in that: in the step one, the primary crushing equipment is one or more of a gyratory crusher, a jaw crusher, a counterattack crusher and a hammer crusher, and the diameter of the product a is less than 180 mm.

3. The sand making production process of the dry-method roller press according to claim 1, characterized in that: in the second step, the secondary crushing equipment is one or more of a single-cylinder cone crusher, a counterattack crusher and a hammer crusher; the diameter of the product b is less than 50 mm.

4. The sand making production process of the dry-method roller press according to claim 1, characterized in that: in the third step, the primary screening equipment is of a double-layer structure and adopts one of a linear screen, a circular vibration screen, a resonance screen and a probability screen, and the diameter of the upper-layer screen hole of the primary screening equipment is 40-41mm, and the diameter of the lower-layer screen hole of the primary screening equipment is 5-6 mm.

5. The sand making production process of the dry-method roller press according to claim 1, characterized in that: and fifthly, the sand making equipment is a roller press, and the diameter of the product d is less than 5 mm.

6. The sand making production process of the dry-method roller press according to claim 1, characterized in that: and sixthly, the powder removing equipment is a powder concentrator, the product e1 is stone powder with the diameter smaller than 0.075mm, and the product e2 is sand with the diameter larger than or equal to 0.075mm and still has a certain powder content.

7. The sand making production process of the dry-method roller press according to claim 1, characterized in that: and in the seventh step, the secondary screening equipment is an air screening sieve or a composite powder concentrator, the diameter of the product f1 is less than 0.075mm, the diameter of f2 is 0.075-3mm, and the diameter of f3 is more than 3 mm.

Technical Field

The invention relates to the field of sand making processes, in particular to a sand making production process of a dry-method roller press.

Background

The traditional machine-made sand process is generally produced according to a dry method, a vertical shaft impact crusher is generally adopted for dry-method sand making, the maximum sand making amount of a vertical shaft is 120t/h, and a roller press can reach more than 500t/h, so that the sand making amount can be systematically increased by using the roller press to make sand in the dry-method production, the sand making cost is reduced, and the efficiency is improved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a sand making production process of a dry-method roller press, which has the advantages of electricity consumption saving, large treatment capacity, simple process and high efficiency.

The purpose of the invention is achieved by the following technical scheme: the sand making production process of the dry-method roller press comprises the following steps:

step one, a first crushing procedure: crushing the ore by primary crushing equipment to obtain a crushed product a;

step two, a second crushing procedure: crushing the product a obtained in the step one by secondary crushing equipment to obtain a product b after secondary crushing;

step three, a first screening process: screening the product b obtained in the step two through a primary screening device to obtain a product c3 at the upper layer, a product c2 at the middle layer and a product c1 at the lower layer of the primary screening device respectively;

step four, a circulating procedure: returning the product c3 obtained in the step three to the step two and pouring the product c3 into the secondary crushing equipment;

step five, a sand making process: preparing sand from the product c2 obtained in the step three through sand preparation equipment to obtain a product d;

step six, a powder removing procedure: combining the product d obtained in the fifth step and the product c1 obtained in the third step, and carrying out powder removal through powder removal equipment to obtain products e1 and e2, wherein the diameter of e2 is larger than that of e 1;

step seven, the second screening process: screening the product e2 obtained in the sixth step through secondary screening equipment to obtain products f1, f2 and f3 with diameters sequentially increased, and combining the product e1 obtained in the sixth step with the product f 1;

step eight, a circulating procedure: the product f3 from step seven was returned to step five and poured into the sand making equipment.

Preferably, in the first step, the primary crushing equipment is one or more of a gyratory crusher, a jaw crusher, a counterattack crusher and a hammer crusher, and the diameter of the product a is less than 180 mm.

As a preferable technical scheme, in the second step, the secondary crushing equipment is one or more of a single-cylinder cone crusher, a counterattack crusher and a hammer crusher; the diameter of the product b is less than 50 mm.

As a preferable technical scheme, the primary screening equipment in the third step is of a double-layer structure, one of a linear screen, a circular vibration screen, a resonance screen and a probability screen is adopted, and the diameter of an upper-layer screen hole of the primary screening equipment is 40-41mm, and the diameter of a lower-layer screen hole of the primary screening equipment is 5-6 mm.

As a preferable technical scheme, the sand making equipment in the fifth step is a roller press, and the diameter of the product d is less than 5 mm.

As a preferable technical scheme, the powder removing equipment in the sixth step is a powder concentrator, the product e1 is stone powder with the diameter of less than 0.075mm, and the product e2 is sand with the diameter of more than or equal to 0.075mm, and still has a certain powder content.

As a preferable technical scheme, in the seventh step, the secondary screening equipment is an air screening sieve or a composite powder concentrator, and the product f1 has a diameter of less than 0.075mm, an f2 diameter of 0.075-3mm and an f3 diameter of more than 3 mm.

The invention has the beneficial effects that:

1. the method has the advantages of the traditional dry-method sand making production, greatly improves the sand making quantity and the product quality of the sand making, and simultaneously achieves environmental protection and cleanness;

2. compared with the traditional process, the invention has the advantages of low energy consumption, environmental protection, large sand production yield and more suitability for the market.

Drawings

FIG. 1 is a schematic view of the production process of the present invention.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

example (b): as shown in the attached figure 1, the sand making production process of the dry-method roller press comprises the following steps:

step one, a first crushing procedure: crushing ores through primary crushing equipment, wherein the primary crushing equipment is one or more of a gyratory crusher, a jaw crusher, a counterattack crusher and a hammer crusher to obtain a crushed product a, and the diameter of the product a is less than 180 mm;

step two, a second crushing procedure: crushing the product a obtained in the step one by secondary crushing equipment, wherein the secondary crushing equipment is one or more of a single-cylinder cone crusher, a counterattack crusher and a hammer crusher to obtain a product b after secondary crushing, and the diameter of the product b is less than 50 mm;

step three, a first screening process: screening the product b obtained in the step two through a primary screening device to obtain a product c3 at the upper layer, a product c2 at the middle layer and a product c1 at the lower layer of the primary screening device respectively, wherein the primary screening device is of a double-layer structure and adopts one of a linear screen, a circular vibration screen, a resonance screen and a probability screen, and the diameter of an upper-layer screen hole of the primary screening device is 40-41mm, and the diameter of a lower-layer screen hole of the primary screening device is 5-6 mm;

step four, a circulating procedure: returning the product c3 obtained in the step three to the step two and pouring the product c3 into the secondary crushing equipment;

step five, a sand making process: sanding the product c2 obtained in the step three through a roller press to obtain a product d with the diameter smaller than 5 mm;

step six, a powder removing procedure: combining the product d obtained in the fifth step and the product c1 obtained in the third step, and performing powder removal through a powder concentrator to obtain products e1 and e2, wherein the product e1 is stone powder with the diameter of less than 0.075mm, and the product e2 is sand with the diameter of more than or equal to 0.075mm and still has a certain powder content;

step seven, the second screening process: screening the product e2 obtained in the sixth step through an air screening sieve or a composite powder concentrator to obtain a product f1 with the diameter of less than 0.075mm, a product f2 with the diameter of 0.075-3mm and a product f3 with the diameter of more than 3mm, and combining the product e1 obtained in the sixth step with the product f 1;

step eight, a circulating procedure: the product f3 (i.e. grit) from step seven was returned to step five and poured into the sand making equipment.

Compared with the prior art, the method has the advantages of the traditional dry-method sand making production, greatly improves the sand making quantity and the sand making product quality, has good fineness modulus and gradation, and is more suitable for the market; meanwhile, the energy consumption is low, the cleaning and the environmental protection are realized, and the production efficiency is greatly improved.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.