An enrichment and smelting method for resource utilization of copper-containing solid waste

Abstract

The invention provides a concentration smelting method for resource utilization of copper-containing solid waste. Oxygen is introduced into the copper-containing solid waste in a lime solution for oxidation transformation, transformed slag and other copper-containing solid waste ingredients are mixed, the moisture content of a mixture, the copper content and the mass ratio of FeO:SiO2:CaO are each kept in the required range, meanwhile starch is added, and bricks are made; the mixture bricks and coke are alternately added to a smelting furnace, oxygen-enriched air is introduced for concentration smelting, a heavy-phase melt produced through smelting controls a cooling process for separating produced coarse copper and ice copper, the molten slag in a fuming furnace is subjected to matte smelting dilution and fuming for recovering copper and tin, and the molten slag is finely ground and then separated for further recovering the copper. According to the key of the concentration smelting method, calcium sulfate is used as a new sulfur-fixing agent, then the starch is used as a binder and a reducing agent at the same time, then the harmless disposal and resource utilization of the copper-containing solid waste are achieved by controlling the copper content in the molten slag, and finally recovery of the copper and tin in the molten slag is achieved by the adoption of matte smelting dilution and fuming.

Description

technical field [0001] The invention relates to a metallurgical process in the field of nonferrous metallurgy, in particular to a metallurgical method for treating copper-containing solid waste by combining wet conversion and pyromelting. Background technique [0002] Copper is a rose-red heavy non-ferrous metal. Its excellent physical and chemical properties are widely used in various fields such as electrical, national defense, light industry, machinery manufacturing and construction. It is second only to aluminum in the consumption of non-ferrous metal materials in my country. . At present, the general use ratio of copper is as follows: 48-49% in the electrical industry, 19-20% in the communication industry, 14-16% in construction, 7-10% in transportation, and 7-9% in home appliances and others. In 2014, the output of ten non-ferrous metals in my country was 44.17 million tons, including 24.38 million tons of electrolytic aluminum, 7.96 million tons of refined copper, 4.2...

AI Technical Summary

Problems solved by technology

Although the hydrometallurgical method has the advantages of simple process, good metal separation effect and high metal recovery rate, it has the disadvantages of poor material adaptability, high treatment cost and large output of three wastes, making it difficult to widely promote the method

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