Process and device for treating decopperized slag by adopting bottom-blowing molten pool to produce wet lead and raw copper

Abstract

The invention belongs to the field of nonferrous metal, in particular to a process and a device for treating decopperized slag by adopting a bottom-blowing molten pool to produce wet lead and raw copper. A bottom-blowing smelter hearth is utilized to smelt decopperized slag to produce wet lead, furnace slag and lead copper matte, ferrum-silico-calcium slag is produced in the smelting process, the furnace slag serves as building material factory raw materials after meeting the disposal slag requirements, and a bottom-blowing converting furnace is utilized to convert the lead copper matte to produce raw copper. The process has low energy consumption, long service life of the furnace, high metal recovery efficiency, low product cost, high smelting environment protectiveness , easy realization of automatic control of process, and high labour productivity; the disposal slag contains low-grade valuable metal, and therefore, the disposal slag can be comprehensively utilized as raw materials in building material industry, which accords with the recycling economy principle.

Description

Technical field: [0001] The invention belongs to the field of nonferrous metallurgy, and in particular relates to a process and a device for producing blister lead and blister copper by adopting bottom-blowing molten pool smelting to process copper-removing slag. Background technique: [0002] In the process of lead smelting, whether crude lead is refined by pyrolysis or electrolytic refining, it is necessary to remove copper by pyrolysis at the beginning of refining. The main components of copper removal slag produced by fire copper removal are shown in the following table (see Table 1). [0003] Table 1: Analysis list of main elements of copper removal slag [0004] [0005] The purpose of fire treatment is to separate the main component lead in the copper removal slag, and enrich the copper in the form of matte copper. The matte obtained here contains Cu 2 In addition to S and FeS, it also contains a lot of PbS. Most lead smelters sell the matte to copper smelters ...

AI Technical Summary

Problems solved by technology

The main problem is that the low concentration of SO 2 The flue gas is difficult to recover and pollutes the environment; the labor intensity is high and the working environment is poor; the thermal efficiency is low and the energy consumption is high; the furnace temperature changes greatly, the slag is highly corrosive, and the life of the furnace lining is short, etc.

A domestic company uses a converter to remove copper slag, which improves the working conditions and operating environment, reduces energy consumption and costs, but still uses intermittent operation, and still uses the iron filings soda ash method, so the furnace life is short, environmental pollution, etc. The problem will not be greatly improved

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