How to crush the gypsum, grind the powder, can the gypsum be re crushed and reused when it is dry?

Gypsum mill production line Weizhen cement industry, gypsum is a natural ore with calcium sulfate dihydrate as the main component. China's gypsum resources are extremely rich and widely distributed, with reserves in Shandong, Inner Mongolia, Qinghai, Hunan and other provinces. Shanghai Changlei exclusively provides gypsum grinding equipment, such as:

Jaw crusher, impact crusher and cone crusher can be selected arbitrarily according to different processes, and gypsum ore of different sizes can be crushed into small particles of less than 30mm, which can be transported to the gypsum special mill for grinding by belt conveyor, and then the gypsum pulverized powder of the required fineness will be sent to the boiling furnace for calcination by the separator, and the final qualified gypsum powder can be transported to the cement plant for use.

In gypsum production, the most important thing is the mill processing equipment.

Mills are widely used in metallurgy, building materials, chemical industry, mining and other fields of mineral products grinding and processing. According to the fineness of the grinding material and the fineness of the discharging material, the mill can be divided into six types of mills: Raymond mill, longitudinal pendulum mill, high-pressure hanging roller mill, high-pressure micro powder mill, straight-through centrifugal mill, overpressure trapezoidal mill, and three-ring medium-speed mill.

The high-pressure hanging roller mill Raymond mill is composed of a main engine, an analysis machine, a blower, a finished cyclone separator, a pipeline device, a motor, etc. The main engine is composed of a frame, an air intake volute, a shovel, a grinding roller, a grinding ring, a cover and a motor. Auxiliary equipment includes jaw crusher, bucket elevator, electromagnetic vibration feeder, electric control cabinet, etc., which users can flexibly choose according to the site situation.

Generally, it can't, weathered gypsum can not be dissolved in water, depending on what kind of gypsum waste, the waste gypsum after the mold is used, can be calcined, grinded, a small amount of semi-hydrated gypsum powder added, can also be sold to cement factories, as cement additives, can adjust the cement solidification speed.

Gypsum is a monoclinic mineral, which is a hydrate of calcium sulfate (CaSO4) whose main chemical composition is calcium sulfate. Gypsum is a versatile industrial material and building material. It can be used as cement retarder, gypsum building products, model making, medical food additives, sulfuric acid production, paper fillers, paint fillers, etc.

The microporous structure and heating dehydration of gypsum and its products make it have excellent sound insulation, heat insulation and fire resistance.

Generally, gypsum can refer to two minerals: raw gypsum and anhydrite.

Raw gypsum is calcium sulfate dihydrate (CA SO4 ·2H2O), also known as gypsum dihydrate, water gypsum or soft gypsum, theoretical composition, H2O+, monoclinic crystal system, the crystal is plate-like, usually dense block or fibrous, white or gray, red, brown, glass or silk luster, Mohs hardness of 2, cleavage parallel and complete, density.

Anhydrite is anhydrous calcium sulfate (CA SO4), theoretical composition, orthorhombic crystal system, crystals are plate-like, usually dense block or granular, white, off-white, glass luster, Mohs hardness of 3, cleavage parallel complete, density. The two types of gypsum are often produced together, and can be converted into each other under a certain geological action.

It depends on what kind of gypsum waste it is.

After the mold is used, the waste gypsum can be calcined, grinded, and a small amount of semi-aqueous gypsum powder can also be sold to the cement factory, as an addition to the cement, and the cement solidification speed can be adjusted.

It's just that this is suitable for a large amount of gypsum waste, if there is no need to be so troublesome, after all, gypsum powder is not very expensive, and the cost of gypsum waste through **, calcination, grinding and other processes is not small.

This depends on what kind of gypsum waste, and the waste materials are as follows:

After the mold is used, the waste gypsum can be calcined, grinded, and a small amount of semi-hydrated gypsum powder is added.

It can also be sold to cement factories as an additive to cement to adjust the cement setting speed.

It's just that this is suitable for a large amount of gypsum waste, if there is not much there is no need to be so troublesome, after all, gypsum powder is not very.

It is expensive, and the cost of gypsum waste through **, calcination, grinding and other processes is not small.

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The time it takes for gypsum powder to be scraped on gypsum board is determined by a number of factors, including the quality of the gypsum powder, the consistency of the slurry, the ambient temperature, humidity, etc. However, there are a few tips that can help you get through the chalking process quickly:1

Control the consistency of the slurry: When adding the gypsum powder, gradually add water and stir with a trowel to control the ratio of gypsum and water to ensure that the slurry is not too thick. This ensures that the gypsum powder is smoother and more symmetrical on the surface of the plasterboard and that it is chalking faster.

2.Pay attention to the ambient temperature: In some warm environments, drywall can absorb moisture more easily, so it can also be chalked more quickly.

In colder or humid environments, gypsum powder will be pulverized relatively slowly. If you need to operate in a cooler environment, you can make the water where the slurry is made slightly warmer. 3.

Control the speed at which water is added: After adding the gypsum powder to the water, stir it gradually to ensure that all the plaster powder is wet. If too much water is added at one time, the dry gypsum powder will not be able to mix with the wet gypsum, and the chalking time will be longer.

The above methods can help you speed up the chalking. Don't forget to pay attention and speed when scraping, which can also improve the efficiency of chalking. While there are several ways to help speed up the chalking, the quality of the drywall also needs to be considered.

If the drywall is uneven or has an uneven surface, it will be difficult for the gypsum powder to be evenly distributed over the entire surface. Therefore, check and verify the quality of the gypsum board before operation to ensure that the surface has sufficient flatness. (327 words)<>

Hello dear, chalking is a process in which gypsum powder forms a slurry state after mixing water. In order to speed up the pulverization of gypsum powder, the following methods can be considered:1

Choose the right amount of gypsum powder: Factors such as particle size, bulk and water content of gypsum powder will affect the pulverization rate of gypsum pulp. Therefore, when choosing gypsum powder, it is best to choose gypsum powder with fine particle size, high loose mass chain and low water content, so that it can be easier to form a slurry state.

2.Appropriate amount of mixed water: When mixing gypsum powder with water, it is necessary to pay attention to the appropriate amount of water to control the amount of water.

If the amount of water is too small, the gypsum powder will not be able to absorb enough water and will be pulverized slowly. If the amount of water is too much, it will cause the gypsum slurry to be too thin and thin, which will affect the quality of the gypsum board. Therefore, it is best to control the amount of water according to the content of gypsum powder and the brand.

3.Accelerator: A small amount of accelerator can be added to the gypsum slurry, such as quicklime, aminite, calcium salt, etc.

These additives are beneficial to speed up the hydration reaction of gypsum powder, which in turn accelerates the formation of gypsum slurry. 4.Stirring speed:

When mixing the gypsum powder with water, it needs to be stirred thoroughly. The faster the stirring, the faster the gypsum powder will be pulverized. Therefore, an electric agitator can be selected for stirring, which increases the mixing speed and thus accelerates the pulverization rate of gypsum powder.

5.Temperature control: During the plasterboard chalking process, the temperature will also affect the speed of chalking.

Normally, the pulverization rate of gypsum powder will increase with increasing temperature. Therefore, at low temperatures, hot water can be added to the gypsum slurry.