Hydrochloric acid process of producing feed level calcium diphosphate and gypsum coproduct
A technology of calcium hydrogen phosphate and hydrochloric acid method, which is applied in the molding or processing of animal feed, animal feed, chemical instruments and methods, etc., can solve the problems of uneconomical economy, large ammonia consumption and high product cost, and achieve comprehensive economic benefits. Improve and reduce environmental pollution, the effect of advanced production technology
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[0016] A. Acid hydrolysis and sedimentation separation: first, the calcium water (or / and clear water) after the secondary neutralization treatment will be used to prepare 60% of the solid content, P in the phosphate rock powder 2 o 5 2m pulp with a content of 33% 3 Put it into the acidolysis tank with a stirrer, under stirring at 14m 3 The flow rate of / h added concentration is 125g / L hydrochloric acid 7.3m 3 (the dilute hydrochloric acid 6.3m that this embodiment reclaims by H 3 and 1m 3 Concentration of 20% of the industrial hydrochloric acid), after 60 minutes of reaction, a section of the sedimentation concentrate obtained by neutralization 1.5m 3 Add 50Kg of sodium sulfide aqueous solution with a concentration of 2%, stir and react for 5 minutes, then add 50Kg of an aqueous solution of polyacrylamide with a concentration of 0.5% and a molecular weight of 60,000, stir and mix evenly, and then set aside to settle and separate the acid solution;
[0017] B. Filtration: ...
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