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A method of ventilation recovery

A recovery method and air volume technology, applied in the field of blast furnace smelting, can solve problems such as gas abnormality

Active Publication Date: 2020-12-11
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The invention provides a method for recovering air supply to solve the technical problem of gas abnormality after the wind is stopped

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  • A method of ventilation recovery

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Embodiment Construction

[0040]In order to enable those skilled in the technical field of the present application to understand the present application more clearly, the technical solutions of the present application will be described in detail below through specific embodiments with reference to the accompanying drawings.

[0041]The invention discloses a method for air supply recovery, which is mainly aimed at super large blast furnace (effective volume 4000m3) Under heavy load (coke load greater than 5.50) and large coal ratio (coal ratio greater than 195kg / t) smelting conditions, the key and difficult problems in the air supply recovery process after the air supply is stopped and the air supply is integrated. The application of blast furnace adjustment and operation methods enables the blast furnace to reach full production as soon as possible, avoiding fluctuations in furnace conditions, effectively shortening the recovery time, improving the production efficiency of the blast furnace, and reducing the sm...

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Abstract

The invention discloses an air supply recovery method, and mainly aims to rapidly recover the working of an ultra-large blast furnace after wind is stopped under a smelting condition with a heavy loadand a large coal ratio, wherein coke load is equal to or greater than 5.50, and the coal ratio is equal to or higher than 195 kg / t. By means of controlling and dredging margin gas of the ultra-largeblast furnace, enhancing the opening degree of center gas of the ultra-large blast furnace in the meantime, optimizing air supply parameters in the air supply recovery process, controlling material disorder caused by air stopping, and controlling pressure stop of the ultra-large blast furnace during air stop and air supply, the recovery time is shortened, the yield loss caused by furnace conditionfluctuation is avoided, and rapid full-wind design capacity is reached. According to the method, the air supply recovery time of the ultra-large blast furnace can be effectively reduced, the production efficiency of the blast furnace is improved, and the smelting cost is reduced. The method is suitable for being used for the ultra-large blast furnace for heavy load smelting.

Description

Technical field[0001]This application relates to the technical field of blast furnace smelting, and in particular to a method for air supply recovery.Background technique[0002]The blast furnace needs to be shut down for maintenance on a regular basis for necessary equipment maintenance. After the maintenance is completed, it needs to be restored to normal smelting state. If the furnace condition recovers smoothly, it can shorten the recovery time and reduce the output loss, thereby reducing the cost of pig iron, protecting the furnace top equipment, and extending the life of the blast furnace.[0003]At present, a lot of experience has been accumulated in the recovery of air supply of super-large blast furnaces. However, for the recovery of air supply of super-large blast furnaces under heavy load and large coal ratio smelting conditions, the smelting parameters have changed greatly and still have their particularities. Unique place.[0004]After the blast furnace is stopped, the materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/00C21B5/006
Inventor 郑玉平滕召杰王友良魏红旗马建泉范小斌刘长江甄昆泰郑朋超黄俊杰耿丹
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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