METHOD FOR BALANCING IRON BY PRODUCING IRON VITRIOL IN BIO-METALLURGY PROCESS

摘要

A method for balancing iron by producing iron vitriol in bio-metallurgy process involves adjusting and optimizing the parameters, such as temperature in the heap,pH in the leaching liquid and the concentration of iron, during the heap bioleaching process of copper sulfide ore containing excess acid iron, so as to form iron vitriol-like substances in the heap to realize the self-balance of ion; employing CaCO3 (lime stone) to neutralize the free acid in raffinate to maintain the pH value of the leaching liquid in the range favoring formation of iron vitriol, so as to realize the balance of iron in the heap bioleaching process. The method can reduce the expense of environmental protection and the cost of production.