AN APPROACH TO PRODUCE ZINC SULFATE FROM ZINC BLENDE BY SULFURIC ACID LEACHING AT NORMAL PRESSURE

摘要

An approach to produce zinc sulfate from zinc blende has been studied by sulfuric acid leaching at normal pressure. It has been shown that the best leaching rate of zinc is over 95% at temperature 110-120°C, sulfuric acid concention 40%(m), the ratio of liquid to solid 6-7:1, the leaching time 2 h, and the oxygen flux 40 cm~3/min through each liter leaching solution, the leaching rate of iron less than 40% .