Reflection furnace fire refining method for high-arsenic and high-antimony crude copper

Abstract

The invention discloses a reflecting furnace fire refining method for high-arsenic and high-antimony crude copper, and belongs to the technical field of non-ferrous metallurgy, the refining method comprises the following steps: S1, a melting process: crude copper is fed from a feeding port in the top of a reflecting furnace, a burner is started for heating, and copper liquid is obtained; s2, slagging with a composite alkaline flux: adding the composite alkaline flux into the copper liquid for slagging and refining; s3, oxidation process; s4, a reduction process; s5, a casting process: feeding the copper liquid to a casting mold area for slow cooling, then returning the copper liquid to a copper ore blowing system, and finally casting in a copper mold of a disc casting machine to obtain an anode plate; in the step S1, the reverberatory furnace comprises a furnace body and a power mechanism, the furnace body is provided with a flue gas outlet, a feeding opening, a molten copper outlet and a slag discharging opening, the feeding opening is located in the top of the furnace body, the burner is rotationally connected to one side in the furnace body, and the power mechanism is used for driving the burner to rotate in the furnace body. According to the method, high-arsenic, antimony and other impurities difficult to remove in the crude copper can be effectively removed.

Description

technical field [0001] The invention relates to the technical field of metallurgy of nonferrous metals, in particular to a reverberatory furnace fire refining method for high-arsenic and antimony blister copper. Background technique [0002] Blister copper pyro-refining is to remove a part of impurities, the purpose is to provide qualified anode copper for electrolytic refining, and cast into a flat surface, uniform thickness, dense anode plate, so as to ensure the quality of electrolytic copper and reduce the cost of electrolytic refining. [0003] The pyro-refining of blister copper mainly includes two processes of oxidation and reduction. The oxidation stage is to send the oxidant into the molten blister copper at high temperature, and the Cu in the melt is first oxidized to Cu 2 O, Cu 2 O then reacts with other metal impurity elements to oxidize it, and the resulting metal oxide has a small solubility in copper water and a relatively light specific gravity, which can q...

AI Technical Summary

Problems solved by technology

Refined copper can be obtained by refining blister copper in a reverberatory furnace, but the refined copper still contains a lot of high-arsenic, antimony and other impurities that are difficult to remove

The application publication number is CN101654744, and the Chinese patent application publication date is February 24, 2010 discloses a reverberatory furnace fire refining method for blister copper with high arsenic and antimony. Although this method can better remove high arsenic, antimony and It is difficult to remove impurities such as antimony, but because the nozzle is fixed in the reverberatory furnace, the position cannot be changed, which will lead to uneven heating of the materials in the furnace, and the heating efficiency and heat utilization rate are not high

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