Low-temperature reduction smelting method of stibium-containing compound

Abstract

The invention discloses a low-temperature reduction smelting method of a stibium-containing compound. The low-temperature reduction smelting method of the stibium-containing compound comprises the following steps: simultaneously adding the stibium-containing compound and starch into a conical mixer, stirring and mixing; continuously conveying the mixed material to an indirect heating smelting pot; then heating to the required temperature and smelting; and further treating produced stibium. Under the condition of indirect heating, the starch is used as a reducing agent, the purpose of producing the stibium by low-temperature reduction smelting of the stibium-containing compound is achieved, reduction smelting temperature is reduced to be 800-850 DEG C, and the direct recovery rate of the stibium reaches 90.0% or above.

Description

technical field [0001] The invention relates to a pyrometallurgical process in the field of nonferrous metallurgy, in particular to a pyrometallurgical method for low-temperature reduction smelting of antimony-containing compounds. Background technique [0002] Antimony is a silver-white non-ferrous metal that is brittle and has poor electrical and thermal conductivity. It is mainly used in alloys, military industry, flame retardants and glass industries. my country is the country with the largest antimony output in the world. In 2010, the world's antimony output was 167,000 tons, while China's antimony output reached 150,000 tons in 2010, accounting for more than 89% of the world's antimony output. my country's antimony resources and production All have irreplaceable advantages. Mineral raw materials for antimony smelting mainly include stibnite, antimony gold ore, brittle lead-antimony ore, etc. At the same time, the antimony-containing soot produced in the smelting proces...

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Problems solved by technology

Due to the use of reduced pulverized coal as a reducing agent, there are two problems: one is the high smelting temperature, in order to make the slagging components in the reduced coal slagging smoothly, the smelting temperature needs to be kept between 1100 and 1200 °C; the other is On the one hand, the volatilization loss of antimony is serious, and the volatilization and oxidation loss of antimony is serious at high temperature. The volatilization loss of antimony brought about by the two stages of drafting away and volatilization during the feeding process reaches between 35% and 50%, so the direct recovery rate of antimony is usually low, greatly Reduced production efficiency, these problems have been plagued by production enterprises

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