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Online regulating method and device for reducing content of S in blast furnace gas

A technology for blast furnace gas and content, applied in the field of iron making, can solve the problems of high cost of sulfur reduction, failure to effectively use blast furnace desulfurization, etc., and achieve the effect of low cost of desulfurization and good application prospect.

Active Publication Date: 2019-10-08
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the existing flue gas sulfur reduction technology usually needs to introduce desulfurization equipment or desulfurization agent on the basis of the original process and equipment, which fails to effectively apply the desulfurization effect of the blast furnace, and the cost of sulfur reduction is relatively high

Method used

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  • Online regulating method and device for reducing content of S in blast furnace gas
  • Online regulating method and device for reducing content of S in blast furnace gas
  • Online regulating method and device for reducing content of S in blast furnace gas

Examples

Experimental program
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Effect test

Embodiment 1

[0062] This embodiment provides an on-line control method for reducing S content in blast furnace gas, the flow chart is as follows figure 1 As shown, the steps are as follows:

[0063] Detection of SO in the flue gas generated by the combustion of the gas produced by the 7# blast furnace of Wuhan Iron and Steel Co., Ltd. 2 The content is 97.4~118.6mg / m 3 , at this time, the loading capacity of each batch of ore in the blast furnace is 90.6 tons, and the loading capacity of each batch of coke is 16.5 tons. In order to reduce the S content in the blast furnace gas, the following steps are carried out:

[0064] 1) Keep the loading capacity of each batch of ore in the blast furnace at 90.6 tons, and the charging capacity of coke at 16.5 tons.

[0065] 2) By setting the opening of the discharge gate and the number of turns of the distributor on each circle position, the ore / coke ratio of the 1st to 3rd distribution circles in the center remains unchanged, and the ore / coke ratio ...

Embodiment 2

[0073] The present embodiment provides an on-line control method for reducing S content in blast furnace gas, specifically as follows:

[0074] Detection of SO in the flue gas generated by the combustion of the gas produced by the 7# blast furnace of Wuhan Iron and Steel Co., Ltd. 2 The content is 123.0~137.9mg / m 3 , at this time, the loading capacity of each batch of ore in the blast furnace is 94.1 tons, and the loading capacity of each batch of coke is 17.3 tons. In order to reduce the S content in the blast furnace gas, the following steps are carried out:

[0075] 1) Keep the amount of ore loaded in each batch of blast furnace at 94.1 tons, and the amount of coke loaded at 17.3 tons.

[0076] 2) By setting the opening of the discharge gate and the number of turns of the distributor in each circle position, the ore / coke ratio of the 1st to 3rd circles in the center remains unchanged, and the ore / coke ratio of the 4th to 6th circles decreases 3.5%, the ratio of ore / coke i...

Embodiment 3

[0087] The present embodiment provides an on-line control method for reducing S content in blast furnace gas, specifically as follows:

[0088] Detection of SO in the flue gas generated by the combustion of the gas produced by the 7# blast furnace of Wuhan Iron and Steel Co., Ltd. 2 The content is 84.1~92.8mg / m 3 , At this time, the loading capacity of each batch of ore in the blast furnace was 93.4 tons, and the loading capacity of each batch of coke was 17.0 tons. In order to reduce the S content in the blast furnace gas, the following steps were carried out:

[0089] 1) Keep the loading capacity of each batch of ore in the blast furnace at 93.4 tons, and the charging capacity of coke at 17.0 tons,

[0090] 2) By setting the opening of the discharge gate and the number of turns of the distributor in each circle, the ore / coke ratio of the 1st to 3rd circles in the center remains unchanged, and the ore / coke ratio of the 4th to 6th circles decreases by 2 %, the ratio of ore / c...

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Abstract

The invention discloses an online regulating method and device for reducing the content of S in blast furnace gas. The method comprises steps as follows: the composition of flue gas produced after theblast furnace gas is burned in a hot-blast stove is monitored to instruct regulation of a blast furnace in turn; the furnace burden structure of the blast furnace is changed, the material distribution and alkalinity are adjusted and a series of other operations are conducted, so that the distribution ratio of sulfur in blast furnace slag is increased and the ratio of sulfur in gas is reduced, andfinally, the purpose of controlling the content of S in blast furnace gas is achieved. The method has a good flue gas desulfurization effect, is low in cost and easy to control and conduct and has awide application prospect.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and relates to an online regulation method and device for reducing S content in blast furnace gas. Background technique [0002] The blast furnace gas produced by the blast furnace will contain sulfide gas, and the content will fluctuate. Therefore, during the use of blast furnace gas, sometimes the emission of S in the flue gas exceeds the standard. How to control the S in the gas to the range of environmental protection standards It is of great significance for iron and steel enterprises to reduce S emissions. [0003] At present, there are related technologies to solve the problem of excessive sulfur in flue gas by setting up desulfurization devices, such as patent 201910042224.1, a blast furnace gas desulfurization purification method, the steps are: S1, blast furnace gas is dedusted by a dry bag filter device and then enters an organic sulfur conversion device, Convert organic sulfur to ...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21B5/04
CPCC21B5/006C21B5/008C21B5/04C21B2300/04
Inventor 肖志新陈令坤郑华伟陈畏林张庆喜胡正刚李红鲁婷
Owner 武汉钢铁有限公司