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Submerged arc furnace body protection method

A technology for submerged arc furnaces and furnace bodies, which is applied in furnaces, furnace maintenance, furnace components, etc., can solve the problems of decreased service life of submerged arc furnaces, increased safety risks, furnace wall burn-through, etc. Reduction temperature and reduction speed, the effect of prolonging the service life

Inactive Publication Date: 2020-11-17
嘉峪关宏电铁合金有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

[0002] As an important link in the ferroalloy smelting production system, after the age of the submerged arc furnace reaches 3 years, the furnace wall will be corroded to varying degrees with the increase of the furnace age, and the furnace eye carbon brick will also produce a large amount of carbon bricks with the increase of the service life. Oxidation (weathering) phenomenon, which will cause the service life of the submerged arc furnace to decrease. At the same time, corresponding personal safety accidents such as furnace wall leakage and furnace wall burn-through often occur during the use process, and the safety risk is greatly increased.

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific examples.

[0026] A method for protecting a furnace body of a submerged arc furnace, comprising the steps of:

[0027] 1) Through constant gear operation, the reference gear is controlled at 11 gears, and the number of adjustments per shift is less than 5 times. According to the chemical and physical components of the feed, the theoretical carbon amount is measured in time, and the actual carbon amount and the theoretical calculation value are controlled. The error is within ±5kg, realizing constant gear operation; reducing the amplitude and frequency of load adjustment, so that the crucible can be stabilized within a certain range, and by exploring the constant gear operation mode, the current fluctuation caused by material collapse can be reduced, thereby affectin...

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Abstract

The invention relates to a protection method in an iron alloy smelting production system, and in particular to a submerged arc furnace body protection method. The submerged arc furnace body protectionmethod aims to stabilize an electrode and a displacement interval range through optimization of a corresponding data analysis trend and an operation process and corresponding technical improvement inproduction operation of an existing iron alloy submerged arc furnace. By means of constant-gear operation control and return slag addition, erosion of the furnace eye and the furnace wall is controlled within a certain range, the erosion amount is reduced, meanwhile, the furnace wall and the furnace eye are repaired, the bonding degree with furnace wall carbon bricks is achieved, and the self-repairing effect is achieved; and secondly, manual plugging operation is replaced, the situation that due to the fact that the mud plugging depth is too small, high temperature moves outwards, molten iron scours furnace eye openings in the inner side is reduced, in addition, input of low-pressure compensation is introduced, the structural proportion of furnace charge is changed, discharging of furnace slag in the tapping process is reduced, the furnace slag is fully subjected to a reduction reaction in the furnace, productivity is released, the service life of the submerged arc furnace is prolonged, and security risks are reduced.

Description

technical field [0001] The invention relates to a protection method in a ferroalloy smelting production system, in particular to a method for protecting a submerged arc furnace body. Background technique [0002] As an important link in the ferroalloy smelting production system, after the age of the submerged arc furnace reaches 3 years, the furnace wall will be corroded to varying degrees with the increase of the furnace age, and the furnace eye carbon brick will also produce a large amount of carbon bricks with the increase of the service life. Oxidation (weathering) phenomenon, which will cause the service life of the submerged arc furnace to decrease. At the same time, corresponding personal safety accidents such as furnace wall iron leakage and furnace wall burn-through often occur during the use process, and the safety risk is greatly increased. Contents of the invention [0003] The object of the present invention is to provide a method for protecting the furnace bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D19/00F27D21/00F27D1/00F27D3/15
CPCF27D1/00F27D3/1536F27D19/00F27D21/00F27D2001/0046F27D2019/0003F27D2019/0034F27D2021/0057
Inventor 郝荣璐展鹏程孙伟王先武
Owner 嘉峪关宏电铁合金有限责任公司
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