Method for volatilizing, calcining and smelting antimony oxide powder

Abstract

The invention discloses a method for volatilizing, calcining and smelting antimony oxide powder. The method comprises the following steps of: (1) pre-treating, namely crushing antimony ore which is used as the raw material into powder of which the diameter is 20 to 25mm; (2) preparing materials, namely mixing the mixed antimony ore, anthracite and furnace slag in a mass ratio of 60:30:10 to prepare a furnace material mixture; (3), crushing the furnace material mixture for the second time and fining the furnace material mixture into powder of which the granularity is 80 to 100 meshes; (4) forming balls, namely preparing material balls of which the diameter is 5 to 8mm; (5), adding materials, namely adding the material balls and the mixed antimony ore in a mass ratio of 40:60 into a hearth of a vertical volatile furnace; (6) calcining, namely volatilizing and calcining at the temperature of between 1,000 and 1,100 DEG C for 90 to 120 minutes; and (7) collecting dust. Waste furnace slag can be comprehensively used by the method. The method has the advantages of saving energy and reducing consumption, along with high raw material utilization rate, high recovery rate of antimony, low production cost and the like.

Description

technical field [0001] The invention relates to the field of antimony ore smelting, in particular to a method for smelting antimony oxide powder. Background technique [0002] Antimony oxide powder is mainly produced by using the volatile characteristics of Sb2O3 after the antimony ore is volatilized and roasted in the volatile roasting equipment. At present, the large and medium-sized antimony smelting plants in my country generally adopt the blast furnace volatilization smelting method and the flat furnace volatilization roasting method. The blast furnace volatilization smelting method is suitable for processing high-grade massive antimony ore and other intermediate products with high antimony content (antimony content higher than 40 %), can not directly process powdery ore, especially not suitable for processing low-grade compound antimony ore (with antimony content less than 20%), a large amount of high-quality metallurgical coke is required, and coke consumption per ton ...

AI Technical Summary

Problems solved by technology

At present, the large and medium-sized antimony smelting plants in my country generally adopt the blast furnace volatilization smelting method and the flat furnace volatilization roasting method. The blast furnace volatilization smelting method is suitable for processing high-grade massive antimony ore and other intermediate products with high antimony content (antimony content higher than 40 %), can not directly process powdery ore, especially not suitable for processing low-grade compound antimony ore (with antimony content less than 20%), a large amount of high-quality metallurgical coke is required, and coke consumption per ton of antimony concentrate is 800-1000kg, high energy consumption

Open hearth furnace volatilization roasting method In order to achieve the temperature required for volatilization roasting, firstly add a sufficient amount of briquettes into the roasting chamber, blow in enough oxygen through the blower, and burn the briquettes to provide a certain amount of heat. After the temperature reaches a certain level, add the pre-processed briquettes. Antimony ore and coal mixture, antimony ore undergoes a series of chemical reactions under the heat provided by coal to form antimony oxide powder, which is collected through condensation and dust collection systems, and the gangue components in the roasted antimony ore And the ash in the combustion becomes slag. Since the antimony ore at the bottom is not easy to volatilize and oxidize, it is easy to cause the bottom layer of the furnace charge to form a furnace phenomenon. It can only be produced intermittently in batches and cannot be operated continuously. The average antimony content in the slag exceeds 2%.

Moreover, in these two existing smelting methods, the slag after roasting cannot be recycled, and it is only treated as waste.

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