Research on separation of valuable metals from red mud by hydrochloric acid

Researches on separation of valuable metals from red mud by hydrochloric acid. Under conditions of hydrochloric acid concentration of 2.0mol/L, HCl excess coefficient of 0.15, leaching time of 2.5h, stirring speed of 400r/min, The experimental results show that low concentrations of hydrochloric acid leaching of Fe and Sc from the red mud can achieve a high leaching rate, while Ti was separated, Fe leaching rates of up to 95.6%, Sc the leaching rate of more than 70%, Ti the leaching rate of 99.5%.