Production technology for one-time tailing combustion in stibium reverberatory furnace

Abstract

The invention discloses a production technology for one-time tailing combustion in a stibium reverberatory furnace, which belongs to the technical field of smelting. The technical process comprises the following steps: A. heating the reverberatory furnace with coal by using a thin coal multi-combustion method; B. adding arsenic caustic sludge, and adding antimony oxide powder at different stages; C. comprising 4-6% of reducer, 1-3% of flux and balance of antimony oxide powder in the antimony oxide powder; D. carrying out reduction, continuing to adding the reducer at different stages, wherein the quantity of the reducer in the whole process does not exceed 10-20% of the weight of the antimony oxide powder; and E. sampling and assaying, and when the content of Sb in the laboratory report is lower than 2%, opening the sludge notch to discharge the tailings. The invention can increase the stibium content and recovery rate, does not need to process the arsenic caustic sludge by a wet process, reduces the environmental pollution and the production cost, and can be used for smelting crude stibium.

Description

technical field The invention relates to the technical field of smelting, in particular to a production process of the antimony reverberatory furnace disposable slag for crude antimony smelting. Background technique In the prior art, when crude antimony is smelted, the antimony reverberatory furnace production process (multiple firing) includes: reverberatory furnace melting and reduction, crude antimony refining, slag treatment, high-temperature furnace gas cooling and dust collection. The production time of furnace antimony ingots is short (4-5 days); and the quality requirements for fuel bituminous coal are not high, and the temperature requirements for multiple firings are not high, about 800-1000°C; at the same time, the unit consumption of soda ash is also low. Less, therefore, adopted by most smelting enterprises. However, this process also has many deficiencies: First, the amount of foamy slag returned to the blast furnace is large, and the antimony content is high....

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Problems solved by technology

However, this process also has many deficiencies: First, the amount of foamy slag returned to the blast furnace is large, and the antimony content is high. According to the conventional reverberatory furnace, the hearth area is 16m 2 According to statistics, the amount of slag produced by each furnace of antimony is about 10 tons, and the grade is between 30-50%. The amount of antimony oxygen is large, reaching about 80 tons (Sb76%), and the direct recovery rate of antimony metal is low, only 78-80%, and the recovery rate is also low; the third is that the production cost of a single furnace is high, and a large amount of bubble slag produced is returned to the blast furnace Re-volatility smelting increases the cost of smelting, and the recovery rate of antimony metal is lower than that of primary ore, and the loss of metal is large; the fourth is that the generated arsenic-alkali slag needs to be recovered by wet treatment, which is not only expensive but also causes Serious pollution of the water environment

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