Submerged arc furnace body protection method

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...

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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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