METHOD AND SYSTEM FOR EXTRACTION OF ZINC FROM LOW-GRADE LEAD-ZINC ORE

摘要

The present invention provides a method and system for extracting zinc from low-grade lead-zinc ore. The device used in the method includes a smelting reduction device and a dust collector connected to each other, wherein the total content of elemental lead and zinc in low-grade lead-zinc ores is less than 20 wt.%, And elemental zinc and lead are in the form of zinc silicate, zinc carbonate, zinc sulfide, lead carbonate and lead sulfide, the method comprising carrying out a reduction smelting reaction with low-grade lead-zinc ore, reducing fuel and cerussite to produce finely divided zinc oxide and lead-containing slag. The use of low-grade lead-zinc oxide ore provides a lower cost. A redox reaction takes place between zinc sulfide and lead oxide, and zinc is enriched in the form of fine fine-grained zinc oxide, whereby zinc and lead are effectively separated from the starting ores.