Producing gypsum and magnetite from ferrous sulfate and separating

摘要

Gypsum and magnetite which are both coarse and of good quality can simultaneously be produced by introducing calcium carbonate into an aqueous solution containing ferrous sulfate while an oxidizing gas is blown, and then carrying out a neutralizing and oxidizing operation at a pH of 5-6 and a temperature of 60-80 DEG C, and can be separately recovered by magnetic separation.