Sustainable Mining and Metallurgy

This paper put forward the idea of making full use of the advantages of high iron content of hematite slag produced by zinc hydrometallurgy, mixing hematite slag with pyrite, and using fluidized roasting furnace to produce iron slag. The mechanism of fluidized roasting of hematite slag and pyrite was analyzed, and the roasting furnace body, dust removal and slag discharge equipment were partially reformed, so as to meet the working condition requirements of the zinc concentrate roasting furnace to burn the mixture of pyrite and hematite slag, and realize the internal coordination of zinc system resources. The iron slag with sulfur content less than 0.5% and iron content more than 55% can be produced by using roasting furnace to treat the mixture of hematite slag and pyrite, which can reduce the treatment capacity of rotary kiln per ton of zinc leaching slag, save production cost and have good economic benefits.