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Method for repairing converter lining through pig iron and slag

A converter lining and slag technology, applied in the manufacture of converters, etc., can solve problems such as high cost, long shutdown time, and environmental pollution, and achieve the effect of reducing the cost of refractory materials and reducing the number of furnace repairs

Inactive Publication Date: 2016-09-07
BENGANG STEEL PLATES
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Traditionally, the converter adopts the repairing process of repairing materials. The repairing materials are added into the furnace by scrap steel hopper and manual throwing method and the furnace body is shaken. The residual heat of the converter is used to make the repairing materials have a certain fluidity, so that they can spread on the furnace lining or damage the slag layer. It takes about 50-60 minutes at a time, and the shutdown time is long, which restricts the continuous production of the converter; the effect of repairing the furnace with repairing materials is good, but the cost is high, polluting the environment, and there are potential safety hazards

Method used

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Embodiment Construction

[0017] A method for repairing the converter lining by using pig iron block + slag, specifically comprising the following steps:

[0018] 1. Drain the molten steel from the previous furnace, and keep the slag in the converter that has an end point carbon ≥ 0.06%, an alkalinity of 3, a MgO content of 10%, a temperature of 1690°C, and good fluidity;

[0019] 2. Shake the converter until the tilting angle is 72°, add pig iron blocks into the converter, keep the pig iron blocks dry and clean, use 2t of pig iron blocks, and control the parts of the furnace lining that need padding above the molten steel pool;

[0020] 3. Immediately shake the converter flat until the tilting angle is 93°, stay for 5 minutes, observe that the slag surface of the slag is not churning, shake the converter for slag splashing operation, and pour out the remaining slag;

[0021] 4. Carry out the next furnace molten steel smelting.

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Abstract

The invention relates to a method for repairing a converter lining, in particular to a method for repairing a converter lining through pig iron and slag. According to the technical scheme, the method for repairing the converter lining through the pig iron and the slag comprises the following steps that after the pig iron is added into a converter, the slag is quickly condensed on a converter lining part needing to be shimmed, and the slag is made to be repeatedly condensed on the converter lining part needing to be shimmed in the process of shaking the converter through the adhesion performance of the pig iron and the slag. By means of the method for repairing the converter lining through the pig iron and the slag, the consumption of the materials for repairing the converter is remarkably reduced, the refractory cost is reduced, and good economic benefits are achieved; and moreover, the time for repairing the converter can be saved, controlling of production rhythm is facilitated, and the productivity is further improved.

Description

technical field [0001] The invention relates to a method for repairing the lining of a converter, in particular to a method for repairing the lining of a converter by using pig iron block + slag. Background technique [0002] During the production process of the converter, due to the serious mechanical damage to the furnace lining by adding scrap steel first, and the frequent erosion and erosion of the large surface of the converter by the high-temperature molten steel when the furnace is poured and slag discharged, it is necessary to repair the furnace lining in a timely manner to prevent accidents in the furnace body . Traditionally, the converter adopts the repairing process of repairing materials. The repairing materials are added into the furnace by scrap steel hopper and manual throwing method and the furnace body is shaken. The residual heat of the converter is used to make the repairing materials have a certain fluidity, so that they can spread on the furnace lining ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/44C21C5/36
CPCC21C5/44C21C5/36
Inventor 赫英利孙明溪
Owner BENGANG STEEL PLATES
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