A kind of processing technology of removing copper slag from crude tin

Abstract

The invention relates to a treatment technology of crude tin cooper removal slag. The treatment technology of the crude tin cooper removal slag, and adopts an oxidation roasting technology to treat the crude tin cooper removal slag, and is characterized in that in order to prevent a kiln wall adhering phenomenon in an oxidation roasting process of the crude tin cooper removal slag, the crude tin cooper removal slag is roughly ground to a crude tin cooper removal slag powder, then the crude tin copper removal slag powder is uniformly mixed with miscellaneous copper anode mud according to a ratio, the mixture is sent into a rotary kiln for mixing, and oxidizing and roasting treatment is performed. According to the method, a crude tin cooper removal slag fine material and the miscellaneous copper anode mud are subjected to the mixed oxidation roasting, so that a softening point is improved, the kiln wall is not easily adhered in the roasting process, a kiln adhering phenomenon is greatlyreduced, and the yield of the copper and nickel is high; meanwhile, the miscellaneous copper anode mud is treated in the process of treating the crude tin cooper removal slag as well, so that the production cost is low; and no wastewater is discharged in the whole process, the cost is low, the whole process is basically mechanically operated, and the labor intensity of workers is low.

Description

technical field [0001] The invention relates to the field of nonferrous metal metallurgy, in particular to a treatment process for removing copper slag from crude tin. Background technique [0002] Materials such as tin-containing concentrate or soot are reduced and smelted in an electric furnace to produce crude tin. During the reduction smelting process, the copper in the material is also reduced to metallic copper and dissolved in crude tin, so in the refining process of crude tin Sulfur is added to remove copper. The slag produced in the copper removal process is coarse tin copper removal slag, also known as sulfur slag, tin copper slag or copper removal slag. The main components of this slag are copper, tin, lead, antimony, Nickel and sulfur, among which tin and lead mostly exist in the form of metal, alloy and oxide, and copper mainly exists in the form of sulfide. The traditional treatment methods for removing copper slag from crude tin include: [0003] (1) Diaphra...

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Problems solved by technology

[0011] In order to achieve the above purpose, the applicant continuously explored and analyzed the cause of the problem of "kiln knotting" in the research and development process, and oxidized and roasted the crude tin copper removal slag separately. Since there is tin element in the crude tin copper removal slag, the melting point of tin is low. During the firing process, it is easy to stick to the kiln wall "kiln kiln". Based on this, we searched for a solution and found that the mixed oxidation roasting of coarse tin copper removal slag fine material and miscellaneous copper anode slime can improve the softening point, and it is not easy to stick to the kiln during the roasting process. Wall, the problem of "kiln knot" mentioned is greatly reduced

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