New technology of separation of the collective lead-zinc concentrate

Based on the laboratory studies of ore concentration and the statistical processing of the characteristics of operating a lead-zinc plant, it is established that obtaining a high-quality commercial lead concentrate is possible only after the additional reduction of the crude concentrate. It is proven that the characteristics of flotation increase as the content of metals in the starting ore increases. The revealed dependences are used in development of the technology of zinc removal from the lead concentrate to improve the characteristics of ore dressing. The idea of this technology is that the batch is prepared from the concentrate and the ore; the charge is ground in the ore mill and concentrated by the schematic of direct selective flotation. An increase in the quality of the lead concentrate is reached due to the opening of aggregates of galenite with sphalerite and pyrite. The increase in the characteristics of ore concentration is explained by an increase in the content of metals in feeding the flotation and by a decrease of the ratio of the zinc content to the lead- the zinc module. The commercial characteristics obtained as a result of industrial tests of the technology of zinc removal from the lead concentrate due to repeated flotation with the starting ore confirmed the high efficiency of the developed technology.