Clean smelting device and technology of low-grade scrap copper

Abstract

The invention provides a clean smelting device and a technology of low-grade scrap copper. A melting furnace and reduction furnace are rotary horizontal cylindrical furnace bodies; flue port of the melting furnace is connected with a smoke inlet of the oxidation-reduction furnace through a flue; a smoke outlet of the oxidation-reduction furnace is connected with a secondary combustion chamber; a copper feed port of the melting furnace is connected with a feed port of the oxidation-reduction furnace through a guide pipe; a plurality of natural gas burners are arranged on one side of the smoke inlet of the oxidation-reduction furnace; two flue ports are formed at the top of the oxidation-reduction furnace; one flue port is a smoke inlet of the melting furnace and is formed at one end of a furnace body; the other flue port is a smoke outlet of the melting furnace and is formed at the other end of the furnace body; the melting furnace and the oxidation-reduction furnace are in parallel axially and not in the same horizontal plane; and the melting furnace is located above the oxidation-reduction furnace. The device and the technology have the advantages that the smoke treatment problemof the melting furnace of the low-grade scrap copper is solved; the smelting intensity is high; an oxygen utilization ratio is high; labor conditions are good; the operation is convenient; the production efficiency is high; the economic benefits are good; and the device and the technology are energy-saving and environmentally friendly.

Description

technical field [0001] The invention relates to the field of nonferrous metallurgy, in particular to a clean smelting device and process for low-grade miscellaneous copper waste. Background technique [0002] my country is a country with few copper ore resources, and the mineral copper mainly depends on imported copper concentrate. Therefore, making full use of scrap copper resources at home and abroad has become an important part of the development of my country's copper smelting industry. Waste miscellaneous copper is divided into high-grade and low-grade waste miscellaneous copper due to different impurities. The waste pure copper or waste pure copper alloy with higher copper content can be directly produced into recycled rods or copper alloy products. Low-grade miscellaneous copper has low copper content and high impurities. It must first be cast into anode copper by fire smelting, and then electrolytically refined into electric copper, and other valuable metals will b...

AI Technical Summary

Problems solved by technology

[0003] In recent years, domestic processing of low-grade scrap copper requires repeated reduction and oxidation, high energy consumption, long production cycle, large loss of refractory materials, and economically unreasonable

In addition, since low-grade scrap copper contains a large amount of organic matter, persistent organic pollutants are produced during the smelting process, and environmental protection problems are difficult to solve. The treatment of its flue gas often needs to be treated separately by adding equipment, which consumes a lot of energy and saves energy. unsatisfactory

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