Chemical-biological purification method for quartz sand
A purification method, chemical and biological technology, which is applied in the field of high-purity quartz sand preparation, can solve the problems of inability to completely remove metal impurities in quartz sand, affect production efficiency, and poor purification effect of quartz sand, so as to improve the effect of pickling and impurity removal, Achieve continuous production and good effect of impurity removal
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[0020] A method for purifying chemical and biological quartz sand, comprising the following steps:
[0021] S1 crushing and screening: use crushing and screening equipment to process raw materials into 40-100 mesh materials
[0022] S2 scrubbing: mechanically scrubbing the material;
[0023] S3 flotation: Add water to the material to adjust the slurry to a concentration of 22-28%, add a foaming agent, and add acid solution to pH = 2.5; heat the quartz mortar to 120-150°C, and keep the acid solution at 20-26°C; The acid solution is 25% sulfuric acid: 36% hydrochloric acid: 65% nitric acid: hydrofluoric acid=45:25:20:10, and the quality of the acid solution is 10-25% of the quartz sand quality;
[0024] S4 Feeding: Open the quartz sand discharge valve first, add acid solution and then open the acid solution discharge valve, the acid solution and quartz sand are continuously mixed to form hot acid-containing materials, and the hot acid-containing materials continue to enter the ...
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