Reduction Smelting Experiment of Copper Dross with Low Copper Content

Abstract

Copper dross with less copper content was used as raw material for reduction smelting experiment, and the effects of the amount of coke fines dosage, the reduction smelting temperature, and the reduction smelting time on the distribution of the main elements in the copper dross between the various layers were investigated by the bath smelting process during the reduction smelting process. The optimum experiment conditions were as follows: the number of coke fines was 0.1% of the mass of copper dross, the smelting temperature was 1250 °C, and the smelting time was 90 min. Under this condition, the medium frequency furnace was used to carry out the pilot experiment of copper dross, and the experiment results were similar to the laboratory results. Copper dross achieved the separation of valuable metals through reduction and smelting, and obtains four kinds of materials such as crude lead, matte, slag, and smoke dust. Metal lead, silver, and arsenic were mainly concentrated in the crude lead, sulfides such as lead sulfide, cuprous sulfide, and ferrous sulfide were mainly concentrated in matte copper, lead oxide, and slag-forming elements were mainly concentrated in slag, and lead oxide was mainly concentrated in smoke dust.