Method for prolonging service life of tapping hole of converter
A tapping hole and converter technology, applied in the field of metallurgy, can solve the problems of low service life, easy wear and corrosion of the tapping hole, etc., and achieve the effects of increasing service life, improving corrosion resistance and wear resistance, and saving refractory consumption
Pending Publication Date: 2022-03-22
SHANDONG TAISHAN STEEL GROUP
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Problems solved by technology
Therefore, there is an urgent need to design a method to prolong the life of the converter taphole to solve the problems of easy wear and corrosion and low life of the existing converter taphole
Method used
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Embodiment Construction
[0021] The technical solutions in the embodiments of the present invention are clearly and completely described in further detail below. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0022] A method for prolonging the service life of the taphole of a converter mainly includes three parts: 1. Improve the structure of the taphole; 2. Reduce the tapping temperature; 3. Reduce the peroxidation of molten steel.
[0023] 1. Improve the structure of the tap hole
[0024] The taphole adopts a double-layer structure of casing bricks and seat bricks. The angle between the taphole and the upper part of the converter is 10°. The gap between the taphole casing bricks and the seat bricks is filled with internal fillers that are accurately injected into the tapping hole. The internal gap between the mouth casing brick and the ...
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The invention relates to the technical field of metallurgy, and particularly discloses a method for prolonging the service life of a tapping hole of a converter, which comprises the following steps: 1) improving the structure of the tapping hole: adopting a double-layer structure of a sleeve brick and a seating brick, filling a gap between the sleeve brick and the seating brick of the tapping hole, and performing double gunning on an inner hole and an outer hole of the tapping hole; (2) reducing the tapping temperature: after 60% of molten steel is poured into a converter, starting to blow oxygen, adding light-burned high-magnesium lime and a slag former into the converter, and adding converter waste slag to obtain end-point molten steel and end-point slag; 3) reducing the peroxidation of the molten steel: adjusting and controlling the carbon content and temperature of the molten steel in the converter by adopting a dynamic control mode, so that the carbon content of tapping is controlled to be 0.05-0.06%, the temperature is controlled to be 1630-1650 DEG C, the peroxidation tapping of the molten steel is prevented, and the carbon-temperature coordinated tapping is ensured; by optimizing the structure of the tapping hole, the tapping temperature and the molten steel peroxidation are reduced, the corrosion resistance and the abrasion resistance of the tapping hole are improved, and the service life of the tapping hole is prolonged.
Description
technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for prolonging the life of a tap hole of a converter. Background technique [0002] The converter tap hole is a refractory channel of the converter, when tapping, molten steel is injected into the ladle through the tap hole. When the taphole brick part is damaged, molten steel passes through the taphole brick to reach the furnace shell area, and the furnace shell steel plate at the joint between the flange and the furnace shell melts through, causing slag and steel to flow out. After steel wear occurs, the remaining molten steel needs to be added to a large amount of lime slag, and then the remaining molten steel in the furnace is poured into the ladle from the large furnace mouth to prevent large-scale burning of the furnace shell. Since there is no slag-blocking measure for steel tapping at the large furnace mouth, the slag and steel are produced together, and the ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C21C5/44
CPCC21C5/441
Inventor 邵书东陈培敦亓海燕曹旭东赵树民亓振宝吴荣刚
Owner SHANDONG TAISHAN STEEL GROUP