Novel production technology for producing sodium fluoride and white carbon black in co-production mode by using fluorosilicic acid
A production process, the technology of fluosilicic acid, is applied in the production process field of producing sodium fluoride and co-producing white carbon black with fluosilicic acid, which can solve the problems of high cost of raw materials and high pressure of wastewater treatment, and achieve control of reaction concentration, reduction of Sewage discharge, the effect of reducing the cost of wastewater treatment
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[0030] Example 1
[0031] 1. Dissolve sodium carbonate with water or sodium fluoride mother liquor, the content is 15-16%.
[0032] 2. Dilute 32-34% water glass to 15-16% water glass content;
[0033] 3. Dilute 40% fluorosilicic acid to 15%;
[0034] 4. Put the diluted water glass solution and fluorosilicic acid into the reaction kettle at the same time according to the proportion. During the reaction process, steam is heated to 80°C, and the pH value is 4-5;
[0035] 5. After the reaction of water glass and fluorosilicic acid is completed, slowly put in the soda ash solution according to the reaction ratio, the reaction process is heated to 80 ℃ with steam, and the pH value is controlled to 9-10;
[0036] 6. After the reaction in the reactor is completed, the solid-solid separation after flotation is carried out using the reaction liquid with a specific gravity difference, and the solid-solid separation is sodium fluoride and silica. Silica can be sold as white carbon black after being...
Example Embodiment
[0037] Example 2
[0038] 1. Dissolve sodium carbonate with water or sodium fluoride mother liquor, the content is 20-21%.
[0039] 2. Dilute 32-34% water glass to 20-21% water glass content;
[0040] 3. Dilute 40% fluorosilicic acid to 20-21%;
[0041] 4. Put the diluted water glass solution and fluorosilicic acid into the reaction kettle at the same time according to the proportion. During the reaction process, steam is heated to 80°C, and the pH value is 4-5;
[0042] 5. After the reaction of water glass and fluorosilicic acid is completed, slowly put in the soda ash solution according to the reaction ratio, the reaction process is heated to 80 ℃ with steam, and the pH value is controlled to 9-10;
[0043] 6. After the reaction in the reactor is completed, the solid-solid separation after flotation is carried out using the reaction liquid with a specific gravity difference, and the solid-solid separation is sodium fluoride and silica. Silica can be sold as white carbon black after be...
Example Embodiment
[0044] Example 3
[0045] 1. Dissolve sodium carbonate with water or sodium fluoride mother liquor, the content is 15-16%.
[0046] 2. Dilute 32-34% water glass to 15-16% water glass content;
[0047] 3. Dilute 40% fluorosilicic acid to 20-21%;
[0048] 4. Put the diluted water glass solution and fluorosilicic acid into the reaction kettle at a ratio of 1:1.05 at the same time. During the reaction process, steam is heated to 80°C, and the pH value is 4-5;
[0049] 5. After the reaction of water glass and fluorosilicic acid is completed, slowly put in the soda ash solution according to the reaction ratio of 1.05, the reaction process is heated to 80 ℃ with steam, and the pH value is controlled to 9-10;
[0050] 6. After the reaction in the reactor is completed, the solid-solid separation after flotation is carried out using the reaction liquid with a specific gravity difference, and the solid-solid separation is sodium fluoride and silica. Silica can be sold as white carbon black after b...
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