Resource recycling method of high-impurity-content copper smelting slag

Abstract

The invention discloses a resource recycling method of high-impurity-content copper smelting slag. The process of removing impurity elements in the copper smelting slag is achieved by re-blowing outside oxygen-containing gas in a vacuum state inside a refining furnace, and the impurity elements in the copper smelting slag is removed to facilitate production of higher-purity higher-quality down-stream products; then the impurity elements are recovered in an oxide state to obtain a condensed-state oxide mixture of the impurity elements, and the mixture is sold out in the form of a metal product. According to the resource recycling method, various copper minerals are converted into a copper oxide phase and various iron minerals are converted into a hematite phase by fully oxidizing the hot-melting copper smelting slag, wholly oxidizing the copper minerals and iron minerals and conducting oxidation separation on mixed copper and iron minerals to facilitate follow-up copper, iron and silicon recovery by adopting a beneficiation treatment process; economic benefits are brought to copper smelting enterprises, the earning capacity of the copper smelting enterprises is improved, meanwhile resource waste is reduced, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery and environmental protection, in particular to a resource recovery method for high-impurity copper smelting slag. Background technique [0002] In the copper smelting industry, pyrometallurgy is usually used to extract copper from copper sulfide concentrate. The process is generally: copper sulfide ore → mining process → copper concentrate → smelting process → matte + smelting slag → blowing Process → blister copper + blowing slag → anode refining process → anode copper → electrolytic refining process → high-purity cathode copper. [0003] Copper smelting slag includes a variety of slags produced in the copper smelting production process, most of which are smelting slag, and a small part of blowing slag and so on. Among them, copper smelting slag mainly includes 0.90% to 3.0% Cu, 35% to 44% Fe, and 25% to 35% SiO 2 . [0004] The purpose of the current copper smelting slag treatment i...

AI Technical Summary

Problems solved by technology

These impurity elements not only have a great negative impact on the existing product quality, consume a lot of resources and energy, and increase the production cost of copper smelting enterprises, but also do not exert their inherent economic value, and do not contribute to copper smelting enterprises. Bring due economic benefits, one side is the cost increase, one side is no output economic benefits, the addition of both sides has brought a significant negative impact on the economic profit margin of copper smelting enterprises, and reduced the profitability of copper smelting enterprises

[0009] Furthermore, in recent years, with the rapid development of the copper smelting industry, the potential expansion of old smelters and new smelters has led to a rapid increase in copper output, and this trend will continue, resulting in an increasing supply of high-quality copper concentrates. getting nervous

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