Stibium blast furnace treatment method using oxygenized air

Abstract

The invention relates to a melting method of the antimony blast furnace adopting oxygen-rich air. The melting method is characterized in that the oxygen produced by an air separation oxygen manufacture equipment or a liquid oxygen vaporizing device is transmitted into an air pipe at the front end or the back end of a blast fan through a pipeline, and mixed with air into oxygen-bearing oxygen-richair with volume concentration more than or equal to 22 percent according to a set proportion, and the oxygen-rich air is led into blast furnace through a blast hole. The melting method is suitable for processing various antimony bearing materials such as oxidized antimony ore, antimony sulfide ore, mixed sulfide-oxide antimony ore, jamesonite, recycled material during the antimony smelting, etc. which bear more than 15 percent of antimony; and the melting method is also suitable for processing the block or powder antimony material provided with various different appearances which is processedby balling. The bed processing ability of the melting method is enhanced by more than or equal to 50 percent, the coking rate is reduced by more than or equal to 40 percent, the iron ore rate is reduced by more than or equal to 40 percent, the comprehensive recycling rate for the antimony is up to 97 percent or more than 97 percent, the SO2 concentration in the waste gas is enhanced by 50 percentto 100 percent, and the better condition for the next waste gas desulphurization (or acid making ) processing and the standard discharging is provided.

Description

Technical field [0001] The invention relates to a fire smelting method of antimony, in particular to an antimony concentrate (or returned material) that volatilizes and oxidizes the main metal antimony into high-grade powdered antimony trioxide through a blast furnace, and the gangue component in the ore A method to generate relatively stable slag with the added flux and realize the separation of slag and antimony. Background technique [0002] At present, more than 90% of antimony production processes at home and abroad use the fire method. The fire rough smelting process of antimony is divided into two categories: volatile roasting and volatile smelting. The volatile roasting method mainly includes roasting furnace, rotary kiln, boiling furnace, etc., and volatile smelting method There are mainly blast furnace. Vortex furnace and other processes. Although the methods are different, the purpose of the process is to volatilize and oxidize the main metal antimony into high-grade ...

AI Technical Summary

Problems solved by technology

Due to the low concentration of oxygen in the air (only about 21%) and high useless components such as nitrogen (up to 79%), not only the smelting process cannot be strengthened, but also a large amount of heat energy is taken away, making this process more advanced than other non-ferrous metal smelting processes. The processing capacity of the process unit is low (about 20t / m 2 .d), high energy consumption and high material consumption (coke rate above 30%, iron ore rate above 50%), SO in waste gas 2 Low concentration (0.8%-1.5%) is not conducive to recycling and comprehensive utilization, thus increasing production costs