Method for processing copper smelting slag

Abstract

The invention discloses a method for processing copper smelting slag. The method includes the steps that outside oxygen-containing gas is re-blown in the vacuum state in a refining furnace, and accordingly the process of removing impurity elements in the copper smelting slag is achieved so as to produce down-stream products with higher purity and better quality; and a condensed-state oxide mixture of the impurity elements is obtained by recycling the impurity elements in an oxide state and sold as a metal product. By sufficiently oxidizing the hot smelting copper smelting slag, copper minerals and iron minerals are completely oxidized, a copper and iron combined mineral is subjected to oxidation separation, all copper mineral phases are converted into copper oxide phases, all iron mineral phases are converted into hematite mineral phases, and copper, iron and silicon can be conveniently recycled by adopting an ore-dressing treatment technology later; economic benefits are brought to copper smelting enterprises and the earning capacity of the copper smelting enterprises is improved; and meanwhile resource waste and environmental pollution are both reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery and environmental protection, in particular to a method for processing 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 is to recover the copp...

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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