Investigation of Cu, Pb, Zn, As, Sb distribution during the lead semiproducts and copper-zinc concentrate comelting

The issues of smelting of difficult for treatment high-sulfur copper-zinc concentrate together with semiproducts and reverts of lead manufacture are considered. The possibility of direct extraction of copper, lead and zinc from copper-zinc concentrate to target products in a one-stage process is substantiated. Presented are the results of laboratory mettings for coprocessing of lead semiproducts, reverts and copper-zinc concentrate at a temperature of 1250 C under the melt bubbling conditions. High indexes of metal extraction into target products were achieved: copper into matte - up to 95% against 88.9% according to the existing technology; lead into lead bullion - up to 94% against 70.8% and zinc into slag - up to 95% compared to 83.7%. Extraction of arsenic and antimony into dust - 91 and 92.3% compared to 69.5% and 59.8%, respectively, which provides circumstances for their removal from the overall process chain of lead production. The use of the proposed solution in lead production will lessen the load on the environment; improve the process figures of the blast concentrating smelting process by reducing the loss of copper, lead with slag and high recovery of arsenic and antimony into dust. Compared to the existing technology, the consumption of coke and quartz flux is significantly reduced: from 6.7 to 2.5% and from 12.5 to 4.7% of the charge weight, respectively. The results of comelting of lead semiproducts and copper-zinc concentrate can form the basis for the development of a new manufacturing method.