以预还原处理后的钒钛磁铁矿混合精矿为原料，用盐酸浸出其中的铁、钒、钛，考察了各因素对铁、钒、钛浸出率的影响，并对浸出渣进行了物相分析. 结果表明，在初始盐酸浓度20%(?)、液固质量比4:1、浸出温度110℃、浸出时间4 h的优化浸出条件下，铁、钒的浸出率分别为91.8%和95.0%，钛的浸出率为0.3%；浸出过程中钛是先溶解?再水解沉淀；盐酸浸出液可用于回收铁和萃取提钒；盐酸浸出渣中TiO2的硫酸分解率达98.2%，可作为硫酸法生产钛白的原料.

The leaching process of Fe, V and Ti from vanadium-bearing titanomagnetite pre-reduced by HCl was investigated, concerning the effect of variation factors on the leaching rate, and the phase-analysis of the leaching residue herein. The results showed under the optimal conditions, with initial concentration of HCl of 20%(?), mass ratio of liquid to solid of 4:1, leaching temperature of 110℃ and leaching time of 4 h, the leaching rate of Fe, V and Ti were 91.8%, 95.0%, and 0.3%, respectively. In the leaching process, Ti was firstly dissolved and subsequent hydrolysis-precipitation. The HCl leaching solution can be used for recovering iron and vanadium extraction in the subsequent process. The decomposition rate of TiO2 of HCl leaching residue by H2SO4 was reached up to 98.2%, deduced the HCl leaching residue can be used as raw materials for production of titanium white by sulfuric acid process.