阅读说明：本技术 一种覆膜砂生产方法及生产线 (Precoated sand production method and production line ) 是由 郭军霞 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种覆膜砂生产方法及生产线,属于覆膜砂生产技术领域,可以提高覆膜砂生产线生产效率,同时保证生产品质,覆膜砂混炼温度未达到第一设定温度时,按覆膜砂实测温度加入冷却液进行降温以缩短混炼时间,使温度下降至第二设定温度；在润滑搅拌阶段加入润滑剂,并进行风冷,使覆膜砂的温度达到第三设定温度以下。(The invention discloses a precoated sand production method and a production line, belonging to the technical field of precoated sand production, which can improve the production efficiency of a precoated sand production line and ensure the production quality at the same time, and when the mixing temperature of precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of precoated sand to reduce the mixing time so as to reduce the temperature to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and performing air cooling to enable the temperature of the coated sand to be below a third set temperature.)

1. A production method of precoated sand is characterized in that when the mixing temperature of the precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of the precoated sand to reduce the mixing time, so that the temperature is reduced to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and then performing air cooling to enable the temperature of the precoated sand to be below a third set temperature.

2. The precoated sand production method according to claim 1, comprising the steps of:

preparing materials and heating to form precoated sand in a first state;

mixing the precoated sand in the first state for a first set time, wherein the mixing temperature of the precoated sand does not reach the first set temperature, and adding a cooling liquid to cool for a second set time to obtain the precoated sand in the second state;

adding a curing agent into the precoated sand in the second state, cooling and blowing for a third set time, adding a lubricant, cooling and blowing for a fourth set time to obtain precoated sand in a third state;

conveying the precoated sand in the third state to a crushing sieve, and conveying the precoated sand to a cooling sorting sieve after vibration crushing;

and (6) sand production.

3. The precoated sand production method according to claim 2, wherein the first set time is 50 seconds.

4. A precoated sand producing method according to claim 2, wherein said second set time is 8 seconds.

5. A coated sand producing method as claimed in claim 2, wherein said third set time is longer than said fourth set time.

6. The coated sand production method as claimed in claim 1, wherein the first set temperature is 110 ℃.

7. The coated sand production method as claimed in claim 1, wherein the second set temperature is 100 degrees celsius.

8. The coated sand production method as claimed in claim 1, wherein the third set temperature is 85 degrees celsius.

9. The method of claim 1, wherein the coolant is water.

10. The utility model provides a tectorial membrane sand production line, includes heating furnace, mixing furnace and goes out the sand device, its characterized in that, discharging device includes the broken sieve, the mixing furnace sets up the discharge end of heating furnace, mixing furnace still communicate the auxiliary material storehouse, and the broken sieve sets up the discharge end of mixing furnace, water cooling pipeline are installed to the broken sieve.

Technical Field

The invention belongs to the technical field of precoated sand production, and particularly relates to a production method and a production line of precoated sand.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The inventor finds that in the production process of the precoated sand, certain redundant time is required to be reserved due to different arrangement and specific regulation of the working procedures, but the redundant time affects the production efficiency of the production line.

For example, in the production process of the coated sand, the raw sand needs to be heated to 130-150 ℃ and then enters a sand mixer, the temperature is continuously reduced by using circulating water during mixing and coating, the temperature needs to be reduced to below 110 ℃ before a curing agent, the temperature generally needs about 70 seconds due to different equipment cooling effects, the curing agent is blown and cooled by using a blower after the curing agent is added, about 50 seconds are needed, and the raw sand is stirred for about 30 seconds after the lubricant is added so that the temperature is below 85 ℃ before sand can be discharged. Under the condition of time allocation, the amount of the precoated sand produced in unit time is constant, and the production efficiency can be further improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a precoated sand production method and a production line, which can improve the production efficiency of the precoated sand production line and ensure the production quality.

In order to achieve the purpose, the invention is realized by the following technical scheme:

in a first aspect, the technical scheme of the invention provides a production method of precoated sand, when the mixing temperature of the precoated sand does not reach a first set temperature, cooling liquid is added according to the actual measurement temperature of the precoated sand to reduce the mixing time, so that the temperature is reduced to a second set temperature; and adding a lubricant in the lubricating and stirring stage, and then performing air cooling to enable the temperature of the precoated sand to be below a third set temperature.

As a further technical scheme, the production method specifically comprises the following steps:

preparing materials and heating to form precoated sand in a first state;

mixing the precoated sand in the first state for a first set time, wherein the mixing temperature of the precoated sand does not reach the first set temperature, and adding a cooling liquid to cool for a second set time to obtain the precoated sand in the second state;

adding a curing agent into the precoated sand in the second state, cooling and blowing for a third set time, adding a lubricant, cooling and blowing for a fourth set time to obtain precoated sand in a third state;

conveying the precoated sand in the third state to a crushing sieve, and conveying the precoated sand to a cooling sorting sieve after vibration crushing;

and (6) sand production.

As a further technical solution, the first set time is 50 seconds.

As a further technical solution, the second set time is 8 seconds.

As a further technical solution, the third setting time is longer than the fourth setting time.

In a second aspect, the technical scheme of the invention also provides a precoated sand production line, which comprises a heating furnace, a mixing furnace and a sand discharging device, and is characterized in that the discharging device comprises a crushing screen, the mixing furnace is arranged at the discharging end of the heating furnace, the mixing furnace is also communicated with an auxiliary material warehouse, the crushing screen is arranged at the discharging end of the mixing furnace, and the crushing screen is provided with a water cooling pipeline.

The technical scheme of the invention has the following beneficial effects:

1) according to the invention, the cooling liquid is used for assisting the cooling of the molding sand so as to shorten the mixing time, and the air cooling is used for assisting the lubricating and stirring step, so that the improvement of the two steps can improve the production efficiency of the precoated sand production line and ensure the production quality at the same time.

2) In the invention, because the temperature reduction range of the clean water is large, the solidification and cooling stage can be finished only by 30 seconds, and the time of the fixed cooling stage is shortened.

3) In the invention, the third set time is longer than the fourth set time, the air cooling is utilized to assist the cooling of the lubricating and stirring stage, and the lubricating oil is added in the lubricating and stirring step, so that the weight of the precoated sand is increased, and the air cooling is used without worrying about the wind damage to the aggregation degree of the precoated sand.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic diagram showing the production steps and production time in the background art,

FIG. 2 is a schematic representation of production steps versus production time according to one or more embodiments of the present invention.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As introduced in the background art, aiming at the defects in the prior art, the invention aims to provide a precoated sand production method and a production line, which can improve the production efficiency of the precoated sand production line and ensure the production quality.