Method for reducing concentration of carbon monoxide in tail gas of Ausmelt furnace

Abstract

The invention discloses a method for reducing the concentration of carbon monoxide in tail gas of an Ausmelt furnace and belongs to the technical field of non-ferrous metal metallurgy. The spray gun oxygen-enriched top-blown submerged smelting technology is adopted. The method comprises the steps of measuring the concentration of carbon monoxide in tail gas of the Ausmelt furnace, and reducing the coal consumption of a spray gun when the measured value of the concentration of carbon monoxide is overhigh; keeping the Ausmelt furnace in the production state constantly, keeping molten bath level at 1500-1900 mm, increasing powdered coal consumption by 50 g each time the molten bath level increases by 100 mm, and keeping molten bath temperature at 1280-1360 DEG C; measuring the oxygen concentration of the spray gun, and reducing the oxygen concentration of the spray gun by 3% of the measured value; keeping the number of revolution of an exhaust fan of the Ausmelt furnace at 1200 rpm. By the adoption of the method, generation of carbon monoxide in tail gas is reduced step by step at source and during production at the same time, the safety of the Ausmelt furnace during production is improved greatly, and potential safety hazards are reduced.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and in particular relates to a method for reducing the concentration of carbon monoxide in an oxygen-enriched top-blown smelting furnace of an Ausmelt furnace. Background technique [0002] During the feeding production of the Ausmelt furnace, due to various reasons, the carbon monoxide content of the tail gas often exceeded the standard, resulting in the failure of the electric dust collector and other systems to operate normally, posing a major safety hazard. This process has a great impact on the production of Australian furnaces. The following points are summarized: [0003] 1. When the carbon monoxide in the tail gas of the Ausmelt furnace exceeds the standard, there is a risk of explosion in the electrostatic precipitator, which endangers production safety. [0004] 2. When the carbon monoxide in the tail gas of the Ausmelt furnace exceeds the standard, it cannot provid...

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Problems solved by technology

[0003] 1. When the carbon monoxide in the tail gas of the Ausmelt furnace exceeds the standard, there is a risk of explosion in the electrostatic precipitator, which endangers production safety

[0004] 2. When the carbon monoxide in the tail gas of the Ausmelt furnace exceeds the standard, it cannot provide qualified flue gas for acid production for the sulfuric acid plant

[0005] 3. When the carbon monoxide in the tail gas of the Ausmelt furnace exceeds the standard, if there is leakage, it will have a great impact on the surrounding environment

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