Leaching method for zinc sulfide concentrate

The invention provides a leaching method for zinc sulfide concentrate. The leaching method comprises the following steps of: performing fine grinding on the zinc sulfide concentrate so as to obtain concentrate slurry; performing one-stage leaching treatment on one part of the concentrate slurry so as to obtain one-stage leaching slurry, and performing cooling treatment on the one-stage leaching slurry; filtering the cooled one-stage leaching slurry, so as to obtain acidic leachate and one-stage leaching residues; returning the acidic leachate, performing cooling treatment on the acidic leachate, and performing heat exchange on the acidic leachate and the one-stage leaching slurry, so as to perform pre-heating treatment on the acidic leachate by use of the one-stage leaching slurry; mixing the preheated acidic leachate with the other part of concentrate slurry, and performing two-stage leaching treatment on the mixture, so as to obtain two-stage leaching slurry; adding an oxidant and a neutralizer into the two