Novel high-impurity copper anode mud treatment technology

Abstract

The invention discloses a novel high-impurity copper anode mud treatment technology. The novel high-impurity copper anode mud treatment technology includes the following steps that firstly, copper anode mud is subjected to sulphating roasting and selenium removing, and copper is leached and removed; secondly, a side-blown converter is used for reduction smelting, wherein a slagging agent and a reducing agent are added to the copper anode mud obtained after sulphating roasting and selenium removing and copper removing, even mixing is conducted, a mixed material is obtained and subjected to melting, slagging and a reduction reaction, and smoke, dross on the upper layer and melt-shaped noble lead on the lower layer are formed; thirdly, vacuum distillation is conducted; and fourthly, gold and silver electrolysis and lead and bismuth recovery are conducted, wherein a Dore alloy is put into an intermediate-frequency furnace to be cast into a silver anode plate for silver electrolysis, and lead electrolysis is conducted after a lead and bismuth alloy is cast into a lead plate. The novel high-impurity copper anode mud treatment technology has the beneficial effects that reaction smelting and vacuum distillation are conducted through the side-blown converter, precious metal and valuable metal are recovered to the maximum degree, and the amount of precious metal left in the technology is reduced to the minimum.

Description

technical field [0001] The invention relates to a process for treating copper anode slime. Background technique [0002] At present, the treatment of copper anode slime can be roughly divided into two modes: fire treatment and wet treatment. Larger scale mostly adopts pyrotechnics. Copper anode mud fire process generally includes: pretreatment → reduction smelting → silver separation treatment → gold and silver electrolysis. Among them: 1) Pretreatment: The main purpose of this process is to remove copper and other impurities for subsequent processing. 2) The gold and silver electrolysis industry is basically the same, but 3) Reduction smelting + silver separation treatment: there are different Therefore, it is also the main part of the copper anode slime smelting process, which has a key impact on the economic and technical indicators of the entire process. Jinguan Copper Branch, a subsidiary of Tongling Nonferrous Metals Co., Ltd., produces about 5,000 tons of copper an...

AI Technical Summary

Problems solved by technology

But first, the copper anode slime obtained by flotation has more impurities, which requires higher content of gold and silver obtained by reduction smelting, and the impurities obtained by reduction smelting are more, which is not conducive to the vacuum distillation in the later stage. Many, it is necessary to increase the flotation facilities of smelting slag, thereby increasing investment and operating costs, and thirdly, it is difficult to effectively separate copper, gold and silver alloys, and thus cannot directly carry out gold and silver electrolysis

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