RECOVERING TREATMENT METHOD FOR THE WASTE ACID PRODUCED IN THE HYDROMETALLURGICAL PROCESS OF SILICON

摘要

A recovering treatment method for the waste acid produced in the hydrometallurgical process of silicon comprises the steps of filtration, diffusive dialysis, detection and proportion of acid. In the step of filtration suspended matter and silicon powder are separated. Using anion exchange membrane separates metal ions and the mixed acid is recovered. At last the concentration of the acid is adjusted and the acid with the needed concentration is obtained.