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[Chemical Knowledge]：Manufacturing method and process of calcium fluoride

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The manufacturing method
of calcium fluoride
1. Introduction

Calcium fluoride (CaF2) is an important inorganic chemical, widely used in metallurgy, glass, ceramics, optical materials and other fields. Due to its unique physical and chemical properties, the manufacturing method of calcium fluoride has attracted much attention. This article will introduce the manufacturing method of calcium fluoride in detail, including raw material preparation, reaction process, product post-treatment and other processes.

2. Raw Material Preparation

1. Calcium Carbonate: Choose high-purity calcium carbonate (CaCO3) as a raw material to ensure the purity of the final product.
2. Hydrofluoric acid: Hydrofluoric acid (HF) is the key raw material for the manufacture of calcium fluoride, and industrial grade hydrofluoric acid with high purity should be selected.

3. reaction process

calcium fluoride is mainly obtained by the reaction of calcium carbonate and hydrofluoric acid. The reaction equation is as follows:

CaCO3 2HF → CaF2 CO2 H2O

1. Ingredients: Calcium carbonate and hydrofluoric acid are added into the reaction kettle according to a certain proportion.
2. Reaction: Under the action of stirring, the calcium carbonate and hydrofluoric acid are fully contacted and reacted. During the reaction, the reaction temperature and reaction time should be controlled to ensure the complete progress of the reaction.
3. Separation: After completion of the reaction, calcium fluoride is separated from the reaction solution by filtration, centrifugation or the like.

4. product post-treatment

1. washing: calcium fluoride is washed several times with deionized water to remove impurities attached to the surface.
2. Drying: Put the washed calcium fluoride into a drying oven and dry to constant weight at an appropriate temperature.
3. Crushing and sieving: According to requirements, the dried calcium fluoride is crushed and sieved to obtain products of different particle sizes.
Precautions for
5.

1. During the entire manufacturing process, the purity of raw materials should be strictly controlled to avoid the impact of impurities on the quality of the final product.
2. During the reaction, the reaction temperature and reaction time should be closely monitored to ensure the complete reaction.
3. In the process of product post-treatment, relevant safety operation procedures should be followed to avoid operator contact with harmful substances.

6. Conclusion The manufacturing method of

calcium fluoride involves multiple processes, including raw material preparation, reaction process, product post-treatment, etc. In order to ensure the quality of the final product, it is necessary to strictly control the purity of raw materials, reaction conditions and product post-treatment process during the entire manufacturing process. Through the manufacturing method introduced in this paper, high purity calcium fluoride can be produced to meet the application requirements of different fields.

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