Research on activator enhanced acid leaching process of titanium concentrate
In response to the problem of high reaction acid concentration in the production of titanium dioxide by sulfuric acid method,which leads to the inability to achieve sulfuric acid equilibrium,an ac-tivator is introduced to enhance the acid hydrolysis reaction process and reduce the reaction acid con-centration.The strengthening effect of the activator on the low concentration acid leaching of titanium concentrate was studied,and the effects of reaction acid concentration and activator dosage on reaction temperature and acid leaching rate were investigated.The results show that the addition of activating agent can increase the heat release of the reaction,increase the reaction temperature,and improve the porosity of the solid phase,resulting in higher leaching activity.Under the conditions of 0.5%activator dosage,1.56:1 acid to ore ratio,and 80%reaction acid concentration,the acid hydrolysis rate of titani-um concentrate reaches 93.47%.The main components of acid leaching residue are TiFeO3,Ca(Fe,Mg)Si2O6 and SiO2,indicating that most of the titanium in the raw material can be transferred to the li-quid phase.
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