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Pig iron fettling method

A technology for repairing furnace and pig iron, which is applied in the direction of manufacturing converters, lining repair, etc., can solve problems such as prolonging production cycle, reducing production efficiency, repairing furnace, etc., and achieves the effect of reducing production cost and improving production efficiency.

Inactive Publication Date: 2013-07-10
SHOUGANG CHANGZHI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the sintering time of repairing materials is long, about 40 minutes each time, and the service period of repairing materials is short, the repairing time does not match the shutdown time, and repairing cannot be carried out without stopping the furnace, which not only prolongs the production cycle, reduces Improve production efficiency, and increase production costs, seriously restricting production and operation

Method used

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Experimental program
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Embodiment Construction

[0007] According to the eroded part of the converter, the method of repairing the furnace with pig iron block is used to repair and maintain the large surface in front of the converter. After the blowing of a heat of molten steel is completed and the steel is tapped, the conventional slag splashing operation is not carried out immediately. Instead, shake the converter to the bottom of the charging level, and determine the inclination angle of the converter according to the repairing position, so that the repairing position is just at the bottom. Depending on the size of the refurbishment part, put the pig iron into the scrap bucket, add 1-2 tons of pig iron for the less eroded ones, and add 2-3 tons of pig iron for the more eroded ones. Hoist the scrap steel hopper by driving, put the pig iron block into the converter, let it stand for 2-3 minutes, start the furnace, carry out the slag splashing operation for 2-3 minutes, after pouring the slag, complete the furnace repair ope...

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Abstract

The invention relates to a pig iron fettling method. The method comprises steps of: not carrying out slag splattering operation after converter blowing and tapping, moving a converter to be below a charging position, inclining the converter until a fettling part in the converter is positioned right below, adding pig irons, standing for 2-3 minutes, starting the converter, splattering slag for 2-3 minutes, pouring the slag and then carrying out next converter blowing. By utilizing the fettling method, the corrosion part of a converter lining is fettled without stopping the converter, so that the fettling time is shortened to be within 3 minutes from 40 minutes, the production cost is lowered, and the production efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, and relates to a method for repairing a converter, in particular to a method for repairing a furnace by using a pig iron block. Background technique [0002] During the production process of converter steelmaking, the furnace body needs to be frequently maintained and repaired. At present, furnace repair materials are mainly used for maintenance to solve the problem of furnace lining erosion. However, the sintering time of repairing materials is long, about 40 minutes each time, and the service period of repairing materials is short, the repairing time does not match the shutdown time, and repairing cannot be carried out without stopping the furnace, which not only prolongs the production cycle, reduces The production efficiency is improved, and the production cost is increased, which seriously restricts the production and operation. Contents of the invention [0003] The object...

Claims

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Application Information

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IPC IPC(8): C21C5/44F27D1/16
Inventor 燕建宏闫文毅江路平
Owner SHOUGANG CHANGZHI IRON & STEEL
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