Process for extracting metallic antimony from antimony soot

Abstract

The invention discloses a process for extracting metallic antimony from antimony soot, which comprises the following steps: S1, leaching: mixing antimony soot with a sodium hydroxide solution, leaching, and carrying out liquid-solid separation; S2, oxidation: adding an oxidizing agent into the filtrate obtained after liquid-solid separation in the step S1, and carrying out liquid-solid separationoperation again after the reaction is completed, wherein the oxidizing agent comprises at least one of hydrogen peroxide, pure oxygen, ozone or sodium peroxide; and S3, reduction: the solid obtained after liquid-solid separation in the step S2 is antimony concentrate, adding a reducing agent into the antimony concentrate, then conducting reduction smelting, and obtaining metal antimony. Compared with the prior art, according to the scheme, after alkaline leaching, oxidation and reduction are conducted in sequence, high-purity metal antimony is prepared, meanwhile, multiple kinds of metal can be recycled step by step, the comprehensive recycling degree is high, and the process has the advantages of being low in production cost, environmentally friendly, good in economic benefit and the likeand is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the combined field of non-ferrous metallurgy wet method and fire method, in particular to a process for extracting metal antimony from antimony soot. Background technique [0002] During the silver smelting process, side-blowing furnace and converter smelting will produce a kind of soot with high antimony content, which is an important source of antimony resources. This soot generally contains 35-60% antimony, 5-30% lead, 0.2-1.5% silver, 2.0-25% arsenic, and 1-3% bismuth. The traditional recycling process is divided into fire method and wet method. Among them, the fire method is to reduce antimony soot with coal powder, then remove impurities step by step, and finally smelt it with oxygen blowing to make antimony white. The advantage of this traditional process is that the process is simple, The purity of antimony white is high, but the disadvantages are that the smelting process is long, the environment is poor, the slag con...

AI Technical Summary

Problems solved by technology

The advantage of the sodium sulfide leaching method is that the antimony leaching rate is high, and the disadvantage is that the production environment is relatively poor, and the qualified rate of the produced sodium pyroantimonate product is low

The advantage of the potassium hydroxide leaching method is that the production environment is relatively good, but the disadvantage is that the direct recovery rate of antimony is low and the operation cost is high

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