The project applies zinc concentrate direct pressure leaching process to turn the sulfur in the concentrate into elemental sulfur and produce sulphur products. It has solved the problem of influence on the smelting production due to the local poor market of sulfuric acid.
Based on the oxygenpressure leach allwet process test report provided by a research institute in China and the development trend of international Zn smelting technology, The project was designed to apply the process flowsheet of Zn concentrate direct oxygenpressure leaching—neutralization of the leached supernatant and Fe removal—threestage continuous purification of the zinc sulfate solution—Zn extraction by large electrode plate—cathode Zn casting.

The design sketch of the project