One-step copper smelting process and device

Abstract

The invention discloses a one-step copper smelting process and device. The device comprises a furnace body provided with a closed furnace chamber. From the bottom, the closed furnace chamber is sequentially provided with a refining area, a converting area and a smelting area from bottom to top. A plurality of first spray guns are arranged on the portions, around the refining area, of the furnace wall. A plurality of second spray guns are arranged on the portions, around the converting area, of the furnace wall. A plurality of third spray guns are arranged on the portions, around the smelting area, of the furnace wall. A plurality of fourth spray guns located below the first spray guns are arranged on the portions, around the refining area, of the furnace wall and/or the bottom. A slag discharging opening is formed in the portion, above the smelting area, of the furnace wall. A feeding port and a flue outlet are formed in the top of the closed furnace chamber. A copper discharging opening is formed in the bottom of the closed furnace chamber. The device has the advantages of being simpler in structure, durable, high in efficiency, less in investment, low in operation cost and the like; the process comprises the steps of distributing and discharging materials, carrying out smelting, converting and refining respectively, carrying out anode copper electrolysis, and treating slag and smelter off-gas, and has the advantages of being short in flow, high in adaptability, low in energy consumption, environmentally friendly and the like.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal metallurgy, in particular to a one-step copper smelting process and device. Background technique [0002] The existing copper pyrometallurgical process is mainly divided into three processes: smelting, blowing and refining. [0003] In terms of smelting, the methods mainly include flash smelting and molten pool smelting, specifically Outokumpu flash smelting, Inco flash smelting, Noranda smelting, Osmelt smelting, Isa smelting, oxygen smelting Bottom blowing smelting, silver smelting, Vanyukov smelting, Tenient smelting, Mitsubishi smelting, Kaldor furnace smelting, rotary float smelting and traditional reverberatory furnace smelting, blast furnace smelting, electric furnace smelting, etc. At present, the traditional smelting process is being replaced by clean and intensified smelting technology, but modern intensified smelting technology also has some problems, such as flash smelting ha...

AI Technical Summary

Problems solved by technology

The Mitsubishi method needs to be equipped with four furnaces, the installation needs a height difference, the construction cost is high, and the waste slag after the electric furnace is diluted has a high copper content; the flash continuous copper smelting method requires water quenching, drying, and fine grinding of the liquid copper matte , high energy consumption, and the copper content of the slag produced is as high as 10% to 20%, and the quality of blister copper is not good; the oxygen bottom blowing continuous copper smelting method uses two bottom blowing furnaces or three bottom blowing furnaces, showing a "one" word ladder Arrangement or arrangement in the form of "product" is a technology independently developed by my country; the Noranda continuous copper smelting method is directly producing blister copper in the early stage, because the slag contains high copper and has many impurities in blister copper, and the treatment of slag is complicated, so it is finally abandoned. Production of blister copper, still producing high-grade matte (70% Cu)

Since the high-temperature melt is easy to damage and corrode the refractory material of the retaining wall during operation, which affects the production efficiency, so this technology needs to be further improved.

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