Method for preparing anode plate by fire refining of complex copper-containing material

Abstract

The invention relates to a pyrometallurgy process in the field of nonferrous metallurgy, and especially relates to a method for preparing an anode plate by fire refining of a complex copper-containing material. The method comprises the following steps: detecting the contents of copper and iron in the complex copper-containing material; preparing a slag former according to a detection result, adding the complex copper-containing material and the slag former into a reaction furnace, heating to a preset temperature, introducing compressed air or oxygen-enriched air, and stirring to carry out oxidation reaction; after oxidation is completed, performing heat preservation for a certain time, then slagging off, reducing with a copper liquid, and pouring to form the anode plate. The method has the beneficial effects that the composite slag former is adopted for oxidizing and slagging, so the fluidity of the slag is improved, the viscosity is low, meanwhile, copper in the slag is further settled, the slag amount is 90-95% of the original slag amount, the slag contains the copper bottom, and the method has the advantages of being high in copper direct recovery rate, short in technological process and low in production cost.

Description

Technical field [0001] The present invention relates to a mortem metal in a colored metallurgy, in particular a method of refining the preparation of the anodus plates with a complex copper-containing material. Background technique [0002] Copper is an important basic metal, with its excellent mechanics, thermal conductivity, conductive, and corrosion resistance, widely used in electricity, communications, buildings, military, transportation and other fields. With the economic development, my country has become the largest copper producer and consumer, with an annual production of refined copper close to 10 million tons. [0003] The production of refined copper is part from the copper mine developed in nature, and the other part is recovered by secondary copper resources. The smelting of traditional copper is mainly produced by copper ore as raw materials. The copper ore is copper concentrate via the mineralization. Since most of the copper ore is existing in the form of sulfid...

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Problems solved by technology

[0007] The impurity removal process of the traditional copper fire refining furnace includes oxidation and reduction processes. In the oxidation stage, quartz sand is added as a slagging agent for slagging and impurity removal. This process has low adaptability to complex high-grade copper-containing materials. Traditional The process of slagging will lead to a large amount of pyro-refining slag, high copper content in the slag, and low direct copper recovery rate. Usually, the slag contains more than 26% copper

Since most copper smelting enterprises had a relatively complete smelting process before, that is, there was a front-end process of pyro-refining, and these slags were returned to the front-end process for processing, but now some enterprises only have a single process of pyro-refining, and do not have the slag return to the front-end process. Due to the conditions of the process, the slag is usually sold directly at a discount, which will bring direct economic losses to the enterprise

[0008] The current relevant research focuses on further recycling the slag after the slag is produced by pyro-refining, which cannot meet the needs of enterprises in terms of process flow and equipment investment, and there are few reports on reducing the copper content in slag directly in the pyro-refining process

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