Manufacturing Method of Fluorosilicic Acid Solution
I. INTRODUCTION
Fluorosilicic acid solution is an important raw material for chemical production, which is widely used in metallurgy, glass, ceramics, electronics and other industries. In this paper, we will introduce the manufacturing method of fluorosilicic acid solution, including raw material preparation, reaction process, and post-treatment.
II. Raw material preparation
1. Fluorosilicate limestone: Fluorosilicate limestone is the main raw material for manufacturing fluorosilicic acid solution, which contains fluorine, silicon, calcium and other elements.
2. Sulfuric acid: Sulfuric acid is used as a reactant to react with fluorosilicate limestone to generate fluorosilicic acid.
3. Water: It is used to prepare sulfuric acid solution and clean the equipment.
3. Reaction process
1. Crushing and mixing: Crush the fluorosilicate limestone to a certain size, mix with sulfuric acid and water in a certain proportion to make slurry.
2. Reaction: The slurry is pumped into the reaction kettle, and the reaction is carried out under a certain temperature and pressure to produce fluorosilicic acid and calcium sulfate precipitation.
3. Separation: After the reaction, the calcium sulfate precipitate is separated from the fluorosilicic acid solution by filtration or centrifugal separation.
4. Post-treatment
1. Purification: add appropriate amount of oxidizing agent to the fluorosilicic acid solution to make the metal ions in it oxidized and precipitated, and then filter or centrifugal separation to get pure fluorosilicic acid solution.
2. Concentration: Concentrate the fluosilicic acid solution to the required concentration by vacuum concentration or evaporation concentration.
3. Storage: Store the concentrated fluosilicic acid solution in a sealed container to avoid contact with air.
V. Precautions
1. Strictly control the reaction temperature and pressure to avoid overloading the equipment and ensure safe production.
2. During operation, pay close attention to the running condition of the equipment to find and solve potential problems in time.
3. Operators need to be professionally trained and familiar with the process and operating procedures to ensure smooth production.
VI. Quality control
In order to ensure the quality of fluorosilicic acid solution, comprehensive quality control of the production process is required. Specifically, it includes the following aspects:
1. Quality control of raw materials: quality inspection of raw materials such as fluorosilicic acid limestone, sulfuric acid and water, etc. to ensure that they meet the relevant standards.
2. Process control: During the production process, pay close attention to the process parameters, such as temperature, pressure, concentration, etc., to ensure that they are within the specified range.
3. Product inspection: Conduct quality inspection on the produced fluorosilicic acid solution, including concentration, purity, metal ion content and other indexes, to ensure that it meets the relevant standards.
VII. Environmental protection and waste treatment
In the production process, some waste will be produced, such as calcium sulfate precipitation, waste water, etc.. In order to ensure environmental protection, the waste needs to be handled properly. The specific treatment is as follows:
1. Calcium sulfate precipitation: it can be utilized as building material or filler.
2. Wastewater: can be discharged or reused only after treatment to meet the environmental protection standard.
VIII. Summarization and Prospect
This paper introduces the manufacturing method of fluorosilicic acid solution, including raw material preparation, reaction process, post-treatment and other links. In the actual production process, the process parameters need to be strictly controlled to ensure product quality and production safety. At the same time, waste treatment and environmental protection are strengthened to realize green production. Looking to the future, with the continuous progress of science and technology, the manufacturing method of fluosilicic acid solution will be optimized to improve the production efficiency and reduce the cost, so as to provide more high-quality raw materials for the development of related industries.
