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[Chemical Knowledge]：Manufacturing method and process flow of fluosilicic acid solution

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The manufacturing method
of fluosilicic acid solution
1. Introduction

fluosilicic acid solution is an important chemical production raw material, widely used in metallurgy, glass, ceramics, electronics and other industries. This article will introduce the manufacturing method of fluosilicic acid solution, including raw material preparation, reaction process, post-treatment and so on.

2. raw material preparation

1. fluorosilicate limestone: fluorosilicate limestone is the main raw material for the manufacture of fluorosilicic acid solution, which contains fluorine, silicon, calcium and other elements.
2. Sulfuric acid: Sulfuric acid, as a reactant, reacts with fluorosilicic limestone to produce fluorosilicic acid.
3. Water: used for preparing sulfuric acid solution and cleaning equipment.

3. reaction process

1. Grinding and mixing: Crushing the fluorosilicate limestone to a certain particle size, mixing with sulfuric acid and water in a certain proportion to make a slurry.
2. Reaction: The slurry is pumped into the reactor and reacted at a certain temperature and pressure to produce fluosilicic acid and calcium sulfate precipitate.
3. Separation: After the reaction, the calcium sulfate precipitate is separated from the fluosilicic acid solution by filtration or centrifugation.

4. post-treatment

1. purification: fluosilicic acid solution to add the right amount of oxidant, so that the metal ions in the oxidation of precipitation, and then through filtration or centrifugal separation, pure fluosilicic acid solution.
2. Concentration: Concentrate the fluosilicic acid solution to the desired concentration by vacuum concentration or evaporation.
3. Storage: Store the concentrated fluosilicic acid solution in a sealed container to avoid contact with air.
Precautions for
5.

1. Strictly control the reaction temperature and pressure to avoid equipment overload and ensure safe production.
2. In the process of operation, pay close attention to the operation of the equipment, and find and solve potential problems in time.
3. Operators should be professionally trained and familiar with the process and operating procedures to ensure smooth production.

6. quality control

In order to ensure the quality of fluosilicic acid solution, it is necessary to carry out comprehensive quality control of the production process. Specifically, it includes the following aspects:

1. Quality control of raw materials: quality inspection of raw materials such as fluorosilicate limestone, sulfuric acid and water to ensure that they meet relevant standards.
2. Process control: In the production process, pay close attention to various process parameters, such as temperature, pressure, concentration, etc., to ensure that they are within the specified range.
3. Product testing: quality testing of the produced fluosilicic acid solution, including concentration, purity, metal ion content and other indicators to ensure that it meets the relevant standards.

7. environmental protection and waste treatment

in the production process, will produce some waste, such as calcium sulfate precipitation, waste water and so on. To ensure environmental protection, waste needs to be properly disposed. The specific treatment methods are as follows:

1. Calcium sulfate precipitation: can be used as building materials or filling materials.
2. wastewater: after treatment to meet environmental standards, can be discharged or recycled. Summary and Prospect of

8.

This paper introduces the manufacturing method of fluosilicic acid solution, including raw material preparation, reaction process, post-treatment and so on. In the actual production process, it is necessary to strictly control the process parameters to ensure product quality and production safety. At the same time, strengthen waste treatment and environmental protection work to achieve green production. Looking forward to the future, with the continuous progress of science and technology, the manufacturing method of fluosilicic acid solution will be continuously optimized to improve production efficiency and reduce costs, and provide more high-quality raw materials for the development of related industries.

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