硫酸法钛白粉酸解渣综合利用试验研究OA

The sulfuric acid process for producing titanium dioxide not only generates a large amount of acidic wastewater,but also produces a large amount of acid slag.The large accumulation of acid slag not only causes resource waste,but also pollutes the environment.This paper took the sulfuric acid method of titanium dioxide acid slag as the research object,proposed the new process of"magnetic separation-NaOH leaching",and investigated the effects of magnetic induction intensity,pulsation stroke,magnetic medium wire diameter,etc.on the recovery of titanium by magnetic separation method,as well as the effects of leaching time,leaching temperature,liquid-solid ratio,etc.on leaching efficiency.The results show that the concentrate product with the yield of 37.31%,TiO2 grade of 50.39%,and recovery rate of 87.64%can be obtained through the magnetic separation process of"one coarse,one fine and one sweep";Magnetic separation concentrate can replace ilmenite as the raw material for the production of titanium dioxide by sulfuric acid method.After pretreatment,magnetic separation tailings can be used as the silicon source for alkali leaching,and under optimal conditions,water glass with a modulus of 2.38 can be produced.The research results pro-vide a new idea for the comprehensive utilization of sulfuric acid method titanium dioxide acid slag.