The invention relates to a treatment method of high-
indium high-iron
zinc concentrate, which comprises the following steps: carrying out two-section acidic
reflux oxygen pressure leaching, including low-
oxygen-pressure leaching and high-
oxygen-pressure leaching, on
zinc concentrate which contains 0.07-0.25% of
indium In, 14-25% of iron and 40-50% of
zinc; directly extracting
indium from the low-oxygen-pressure leaching solution; precipitating iron from the solution after indium extraction by an
oxygen pressure hematite process, thereby producing
hematite slag containing 55-65% of iron; neutralizing the solution after iron
precipitation with zinc
oxide; carrying out zinc dust purification
electrolysis on the neutralized solution to produce electric zinc; returning the neutralized
slag to the low-oxygen-pressure leaching; and separating
sulfur concentrate and flotation
tailings from the high-oxygen-pressure leaching
slag by a flotation process, recovering
sulfur from the
sulfur, and sending the flotation
tailings into a fuming furnace to carry out reduction volatilization treatment. The invention can effectively separate iron, zinc and indium in the zinc concentrate, enhance the
smelting recovery rate of zinc and indium, recycle iron in the zinc concentrate as a resource, and fundamentally avoid producing low-concentration
sulfur dioxide, thereby effectively protecting the environment.