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Method for increasing tapping rate through controlling tubular brick length at tapping hole

A technology of tapping holes and pipe bricks, which is applied in the manufacture of converters, etc., can solve the problems of increased cost per ton of steel, waste of molten steel, and ineffective flow of molten steel, so as to improve the tapping rate, reduce production costs, and increase output Effect

Inactive Publication Date: 2020-03-17
BAOTOU IRON & STEEL GRP
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Problems solved by technology

During the whole furnace operation, the refractory material in the converter was continuously eroded, which made the refractory material thinner, but the length of the newly replaced taphole pipe brick was not shortened synchronously, resulting in the inside of the converter being lower than that of the newly installed taphole pipe. The molten steel at the height of the brick cannot flow out effectively, resulting in a large amount of molten steel remaining inside the converter, resulting in waste of molten steel and increasing the cost per ton of steel

Method used

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  • Method for increasing tapping rate through controlling tubular brick length at tapping hole

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Embodiment 1

[0016] A steelmaking plant uses segmented casing bricks at the outlet of the converter, and the length of the original tube brick is composed of 9 segmented tube bricks. The length of the original taphole pipe brick of the converter is fixed. When the furnace age is about 4100, the refractory material on the tapping side of the converter is eroded and thinned, and the original taphole pipe brick is too long, resulting in the taphole inside the converter. The pipe brick is too high, so that the steel out of the converter is not clean, and the remaining steel is in the range of 0.2 to 0.5 tons, which wastes a lot of effective molten steel, increases the cost of steel per ton, and also has an adverse effect on the effect of slag splashing.

[0017] Improvement measures: split one section of the original 9-section assembled taphole pipe brick in half, and divide one into two half-section pipe bricks. After improvement, it is 8 and a half, the total length is reduced by 100mm, the ...

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Abstract

The invention discloses a method for increasing the tapping rate through controlling the tubular brick length at a tapping hole. When a tubular brick at the tapping hole is changed within the campaignof a converter, the tubular brick length at the tapping hole is reduced according to the erosion situation of a refractory brick in the converter to keep that the tubular brick is leveled with the refractory brick on the inner side of the converter. The method can increase the tapping rate to lower the cost.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, and relates to the content of the effect of replacing a tap hole brick on the tapping rate of a converter, and in particular to a method for controlling the length of the tapping hole brick to increase the tapping rate. Background technique [0002] According to the size and structure of the newly built converter, the length and structure of the tube brick at the outlet of the converter will change. For the determined size and structure of the new converter, the length of the selected taphole pipe brick is determined. During one furnace operation of the converter, due to the asynchronous service life of the refractories, it is necessary to replace the tap hole bricks several times. During the whole furnace operation, the refractory material in the converter was continuously eroded, which made the refractory material thinner, but the length of the newly replaced taphole pipe brick...

Claims

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Application Information

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IPC IPC(8): C21C5/46
CPCC21C5/4653
Inventor 张晓峰陈晓刚张瑞烜史超王爱兰李志成钱静秋
Owner BAOTOU IRON & STEEL GRP
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