МРНТИ 53.03.03                                                                                   №2 (2019г.)

Zholdasbay E.E., Dosmukhamedov N.K.

Abstract. Large volumes of accumulated and growth in the yield of volumes of current slag waste require the search for new approaches and solutions for their use as an additional source of raw materials for the extraction of valuable metals. Of particular interest are slags of autogenous heats and / or continuous conversions, characterized by complex chemical composition and high copper content. In the present work, on the basis of experimental studies, the distribution of non-ferrous metals, iron and arsenic among the smelting products obtained by depletion of high-copper slags by coal was established. The principal possibility of the selective separation of metals according to the smelting products under the conditions of different consumption of reducing agent (coal) is shown: copper, iron – in a copper-ferrous metal alloy; lead, zinc in the gas phase and arsenic – in the gas and partly in the alloy. A complex mechanism of arsenic behavior under conditions of slag depletion has been established: with high coal consumption, it is not possible to achieve high recovery of arsenic into the gas phase. It was shown that low recovery of arsenic into the gas phase (~ 45%) is due to its increased transition to the alloy with an increase in the iron content in the alloy. The results obtained are of fundamental importance from the point of view of choosing the optimal technological parameters and regimes that ensure the equilibrium distribution of metals between the smelting products when organizing recovery methods for the depletion of high-copper slags.
Keywords: slag, depletion, recovery, coal, copper, arsenic, distribution, alloy, sublimates, extraction.