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[Chemical Knowledge]：Production and manufacturing method and process flow of diatomite

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The manufacturing method
of diatomite
1. Introduction

Diatomite is a mineral with unique physical and chemical properties, which is widely used in the field of chemical production raw materials. Because of its unique pore structure, high specific surface area and good adsorption performance, diatomite plays an important role in catalyst carrier, filter material, filler and so on. This paper will introduce the manufacturing method of diatomite in detail, in order to provide a useful reference for the production of chemical products.

2. the properties and application of diatomite

diatomite is mainly deposited by the remains of ancient diatoms, with porous, high specific surface area and good adsorption performance. Therefore, diatomite has a wide range of applications in the field of chemical production raw materials, such as catalyst carrier, filter material, filler, etc.

3. Diatomite Manufacturing Methods

1. Mining and Mineral Processing

First, diatomite raw ore is extracted from the mine. Then, through the beneficiation process, remove impurities and improve the grade of diatomite. Beneficiation methods include gravity beneficiation, flotation, magnetic separation, etc., depending on the nature of the ore.

2. Crushing and grinding

After beneficiation of diatomite ore need crushing and grinding treatment, in order to reduce the particle size, increase the specific surface area. The crushing and grinding equipment can be selected from jaw crusher, ball mill, etc.

3. Pickling

In order to improve the purity of diatomite, it is necessary to carry out pickling treatment. The ground diatomaceous earth is mixed with an acid solution to remove metal ions and organic impurities. Commonly used acids include hydrochloric acid, sulfuric acid, etc.

4.
of water washing and drying
The diatomite after acid washing needs to be washed with water to remove the remaining acid and impurities, and then dried. The drying equipment can be rotary kiln, flash dryer, etc.

5. Calcination

In order to improve the strength and stability of diatomite, calcination treatment is required. The dried diatomaceous earth is calcined at a high temperature to volatilize the organic matter therein to improve the purity of the diatomaceous earth. The calcination equipment can be selected from rotary kiln, electric furnace, etc.

6. Sieving and packaging

calcined diatomite needs to be sieved and classified according to different particle size requirements. Screening equipment can choose vibrating screen, drum screen, etc. Finally, the sieved diatomite is packaged for easy transportation and use.
Precautions for
4.

1. In the manufacturing process, the operating conditions of each process should be strictly controlled to ensure product quality.
2. Pay attention to safety during pickling to avoid acid spilling and hurting people.
3. The temperature and time should be controlled in the calcination process to prevent diatomite from burning or sintering.
4. In the screening process, the appropriate screen should be selected according to the product requirements to ensure that the particle size is qualified.

5. conclusion

diatomite as an important chemical production raw material, has a wide range of applications. Through mining, mineral processing, crushing, pickling, water washing, drying, calcination and screening processes, high-quality diatomite products can be manufactured. In the manufacturing process, the operating conditions of each process should be strictly controlled to ensure product quality and safety. The manufacturing method introduced in this paper can provide a useful reference for the production of chemical products and promote the application and development of diatomite in the field of chemical industry.

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