Antimony bottom blowing blast volatilization smelting technology and antimony bottom blowing blast metallurgical furnace

Abstract

The invention discloses an antimony bottom blowing blast volatilization smelting technology and a antimony bottom blowing blast metallurgical furnace. The antimony bottom blowing blast volatilization smelting technology the steps as follows: supplying heat by coking coal or lump coal, supplying air and oxygen into a hearth by a fan, adding coal and antimony ore burden into the hearth from the top or the upper side surface of the furnace body, allowing flue gas to enter a condensation dust-collection system from the upper side surface or the top of the furnace body, and enabling the air of the fan to blow into the hearth from bottom to top after the air is distributed at the bottom of the hearth. The antimony bottom blowing blast metallurgical furnace comprises the furnace body, a forehearth and a tuyere. The furnace body comprises the hearth, a water jacket and a slag through way, wherein one end of the slag through way is connected with the bottom of the hearth, while the other end of the slag through way is connected with the forehearth; the tuyere is arranged at the bottom of the hearth; and the fan supplies air upwards from the bottom of the hearth through the tuyere. The utilization rate of air is improved and the daily treatment capacity is increased obviously; the uniform distribution of air flows plays a very obvious effect in improving the burning effect of fuel; the fuel burns sufficiently; the furnace temperature rises; the smelting process is strengthened; the daily treatment capacity is improved; antimony is voltilized and oxidized sufficiently; the content of antimony in slag is lowered obviously; and the recovery rate of metal is enhanced remarkably.

Description

technical field [0001] The invention relates to an antimony bottom blowing air volatilization smelting process and a bottom blowing air metallurgical furnace. Background technique [0002] In the existing blast volatilization antimony smelting process, the air is blown into the furnace from both sides of the charge through the belly water jacket tuyeres. The slag reacts with the flux iron ore and limestone to form a very fluid slag, which is discharged through the slag channel. Due to the advantages of strong adaptability to ore, large bed capacity, and high degree of mechanization, the blast furnace involved in this method has become the main antimony smelting equipment in my country through continuous improvement and improvement over the years, and it is different from traditional copper and lead smelting equipment. Like a blast furnace, the air is blown into the furnace from both sides of the charge through the bosh water jacket nozzle, and a series of metallurgical chemi...

AI Technical Summary

Problems solved by technology

[0007] (1) High energy consumption, especially the coke rate, which generally reaches about 35% to 40% of the ore weight;

[0008] (2) The flux rate is high, resulting in high slag rate, which affects the recovery rate of antimony metal;

[0009] (3) The economic benefits of processing low-grade ore are poor due to factors such as high coke rate and low recovery rate

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