Process for continuously separating antimony from gold in antimony-gold concentrate

Abstract

The invention discloses a process for continuously separating antimony from gold in antimony-gold concentrate. The process comprises the steps that the antimony-gold concentrate is continuously thrownon a steel belt of a steel belt furnace, and the steel belt operates at a constant speed to convey the antimony-gold concentrate into a furnace pipe of the steel belt furnace for volatilization and smelting; and antimony inside the antimony-gold concentrate volatizes in a antimony sulfide to enter smoke and is oxidized into antimony oxide in the smoke airflow, the antimony oxide is cooled, then dust is collected through a cloth bag, gold in the antimony-gold concentrate is enriched in volatilization residues, and antimony and gold are effectively separated. Compared with blast furnace volatilization smelting processes commonly adopted by existing domestic antimony smelting plants, the process has the characteristics of being high in furnace burden adaptability, suitable for thick and thinburden layers, high in antimony volatilization rate, low in gold loss rate and the like, and meanwhile, the process can process powdery materials and has the advantages of no need of briquetting before materials enter the furnace and the like, the process is clean and environmentally friendly, and industrial production is facilitated.

Description

technical field [0001] The invention discloses an antimony-gold concentrate treatment process, in particular to a process for continuously separating antimony-gold from antimony-gold concentrate based on a steel belt furnace, and belongs to the field of nonferrous metal metallurgy. Background technique [0002] At present, the main antimony smelting method in my country is antimony pyrolysis, and most of the antimony in my country is produced by volatilization and smelting in blast furnaces. This process mainly utilizes the characteristic that antimony oxide and antimony sulfide in antimony gold concentrate are also volatilized, and the volatilized antimony sulfide is easily oxidized by oxygen in the air, thereby generating antimony oxide. A large amount of air is blown into the furnace, which reacts violently with coke and releases a large amount of heat energy, so that the charge is in a molten state. The antimony sulfide in the concentrate is preferentially volatilized in...

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Problems solved by technology

[0003] (1) The blast furnace is not suitable for direct processing of powdery materials. The antimony-gold concentrate must be mixed and compacted before entering the furnace, which complicates the process

[0004] (2) Blast furnace volatilization smelting requires a large amount of high-quality coke, and the coke rate is high, which increases operating costs and limits its further development

[0005] (3) The content of antimony in the slag produced by blast furnace volatilization and smelting is relatively high, which is the reason for the low recovery rate of metal antimony

At the same time, in order to reduce the antimony content in the slag, it is generally necessary to set up a heated front bed to keep the melt warm so as to facilitate the separation of antimony and gold. The heat preservation of the front bed mainly depends on external heat, which increases fuel consumption.

[0006] (4) When the blast furnace volatilizes and smelts, it will produce a large amount of low-concentration sulfur dioxide pollution, and this concentration of sulfur dioxide cannot be used to make sulfuric acid, so flue gas desulfurization will further increase the cost

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