| abstract |
The invention relates to a method for flashing and removing fluorine and/or chlorine from sulfate solution, belonging to the field of non-ferrous metal metallurgy. The acidic transition metal sulfate solution containing fluorine and chlorine is heated to a high temperature and high pressure state, and then it is introduced into the flash evaporation chamber for instant pressure relief, so that water, fluorine and chlorine evaporate into the gas phase, and the others enter the slag in the form of sulfate crystals. phase, so as to achieve high-efficiency synchronous separation of fluorine, chlorine and transition metals, and at the same time remove fluorine and chlorine impurities, obtain sulfate crystal products with low fluorine and chlorine content. The method has the advantages of simple process, strong adaptability, low cost and high removal efficiency of fluorine and chlorine impurities, and has good industrial application prospect. |