Study on impurity removal technology of ferrous sulfate by-product from titanium dioxide production
Ferrous sulfate as a raw material for the preparation of precursor iron phosphate for positive electrode material has been widely concerned.The metal impurity content of ferrous sulfate by-product from titanium dioxide production is too much to be directly applied to the preparation of battery materials,and the impurity content shall be reduced.The experimental verification and optimization for the existing impurity removal processes(hydrolysis method,chemical precipitation method,crystallization method)are carried out,and the impurity removal method combined with hydrolysis method and crystallization method is preferred,which can make the p(Mg)in the solution less than 500 mg/L,p(Mn)less than 80 mg/L,and other impurities are qualified,and the ferrous sulfate product can be directly used for the preparation of battery-grade iron phosphate.
NETL
NSTL
万方数据
