Oxygen-rich Leaching of Zinc Concentrate under Normal Pressure
Using reactor to simulate the process of zinc concentrate oxygen-rich leaching under normal pressure,the effect of particle size of concentrate,molar ratio of sulfuric acid to zinc,temperature,oxygen pressure,agitation speed,leach time and liquid-solid ratio on leach efficiency of zinc was investigated and the optimal condition was obtained.Under that condition,the leaching rate of zinc is more than 97%,zinc in residue is about 3%,the leaching rate of indium is about 96%,indium in residue is about 0.0004%,silver is seldom leached with most of it in residue and the sulfur content is above 78% in leaching residue.