A Method for Reducing Carbon Monoxide Concentration in Ausmelt Furnace Tail Gas

A carbon monoxide and Smelt furnace technology, applied in furnaces, electric furnaces, rotary drum furnaces, etc., can solve problems such as large impact on the surrounding environment, endangering production safety, electric dust collector explosion, etc., to improve safety and reduce potential safety hazards risk effect

Active Publication Date: 2017-03-01
JILIN JIEN NICKEL IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A Method for Reducing Carbon Monoxide Concentration in Ausmelt Furnace Tail Gas

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Effect test

Embodiment 1

[0021] A method for reducing the concentration of carbon monoxide in the tail gas of Ausmelt furnace, such as figure 1 As shown, the following steps are included, and the following steps are carried out in sequence

[0022] Step 1. Measure the concentration of carbon monoxide in the tail gas of Ausmelt furnace. After the measured value of carbon monoxide concentration is higher than 3000ppm, reduce the coal consumption of the spray gun by 100kg, and reduce the coal consumption of the spray gun by 100kg every minute until the concentration of carbon monoxide in the tail gas is lower than 3000ppm , or the coal consumption of the spray gun is less than 3000kg / h;

[0023] Step 2: Keep the Ausmelt furnace continuously in production, and the surface of the molten pool is 1600mm. For every 100mm increase in the height of the molten pool, the amount of pulverized coal is increased by 50kg, and the temperature of the molten pool is increased to ensure the smooth discharge of Australian...

Embodiment 2

[0028] A method for reducing the concentration of carbon monoxide in the tail gas of Ausmelt furnace,

[0029] Step 1. Measure the concentration of carbon monoxide in the tail gas of Ausmelt furnace. After the measured value of carbon monoxide concentration is higher than 3000ppm, reduce the coal consumption of the spray gun by 100kg, and reduce the coal consumption of the spray gun by 100kg every minute until the concentration of carbon monoxide in the tail gas is lower than 3000ppm , or the coal consumption of the spray gun is less than 3000kg / h;

[0030] Step 2. Keep the Ausmelt furnace continuously in production, and the surface of the molten pool is 1800mm. For every 100mm increase in the height of the molten pool, the amount of pulverized coal is increased by 50kg. Increase the temperature of the molten pool to ensure the smooth discharge of Australian slag, and the temperature of the molten pool Increase to 1320°C;

[0031] Step 3. Measure the oxygen concentration of t...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B5/02C22B23/02C22B15/00
Inventor 高晓艳张志军韩瑞富朱志明袁凤艳翟青雯陈凯丁宁王瑞丰张元龙
Owner JILIN JIEN NICKEL IND
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