Sustainable Mining and Metallurgy

This paper explored the production of reusing the antimony smelting alkali slag as an auxiliary material instead of part of sodium carbonate to the lead smelting system. The slag melting point is lower than the temperature of the lead smelting system, so it can be melted before the copper removal slag and promote the latter to melt, and increase the fluidity of the surface slag layer to provide good conditions for the formation of the molten pond. In addition, the antimony smelting alkali slag has a high Na₂O content, so it can be used to replace part of the sodium carbonate for smelting, thus forming a new process. When the reuse ratio of the slag increased to 4%, the slag yield of lead smelting system decreased from the highest 19.17% to 13.52%. The Pb, Cu and Ag contents decreased in varying degrees, among which the content of Pb decreased from 5.76% to 2.00%, Cu from 3.92% to 1.97%, and Ag from 82.73g/t to 47.82g/t.