Prefabricated carbon-free block of work-lining for steel-ladle

A carbon-free ladle and working lining technology, applied in the field of ladle lining, can solve the problems of difficult construction of castables, unfavorable rapid baking, complex construction, etc., and achieve the effects of fast construction, improved service life, and improved molten steel quality

Inactive Publication Date: 2007-11-07
北京利尔高温材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has some disadvantages, that is, the castable is greatly affected by the construction conditions on site, and the construction is complicated, which is not conducive to rapid baking. The baking time is generally 72 hours, and peeling will occur in the later period of use, requiring multiple repairs
Moreover, the severely deformed ladle will bring great difficulties to the construction of the castable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take Al 2 o 3 94.5% by weight, 4.1% by weight MgO, SiO 2 The aluminum-magnesium castable with a weight percentage of 0.8% is used as a raw material, mixed with water, formed by vibration, cured at 30°C for 6 hours to release the mold, and then heat-treated at 150°C for 10 hours to make a ladle working lining prefabricated block.

[0013] Used in Baosteel's 300-ton refined ladle, the service life is as high as 248 heats, and the cost per ton of steel (1.86 yuan) is much lower than the cost per ton of steel (2.31 yuan) of the ladle castable.

Embodiment 2

[0015] Take Al 2 o 3 93.5% by weight, 4.5% by weight MgO, SiO 2 The aluminum-magnesium castable with a weight percentage of 1.0% is used as a raw material, mixed with water, formed by vibration, cured at 20°C for 12 hours to release the mold, and then heat-treated at 200°C for 6 hours to make a ladle working lining prefabricated block.

[0016] It is used on the 200-ton refined ladle of Anshan Iron and Steel No. 3 Steelmaking, and the one-time service life is as high as 120 furnaces without repair.

Embodiment 3

[0018] Take Al 2 o 3 93.0% by weight, 4.8% by weight of MgO, 4.8% by weight of SiO 2 The aluminum-magnesium castable with a weight percentage of 0.9% is used as a raw material, mixed with water, formed by vibration, cured at 40°C for 5 hours to release the mold, and then heat-treated at 250°C for 6 hours to make a ladle working lining prefabricated block.

[0019] It is used on the 160-ton refined ladle of Benxi Iron and Steel Co., Ltd., and the one-time service life is as high as 120 furnaces without repair.

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PUM

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Abstract

A prefabricated block for non-carbon working liner of steel ladle is prepared from Ca-Mg material or aluminium-spinel material through casting while vibrating. Its advantages are high ablation resistance, long service life and lowered production cost.

Description

technical field [0001] The invention relates to a ladle lining, in particular to a prefabricated block suitable for vibration forming of the working lining of a ladle. Background technique [0002] Most of the traditional ladle walls are built with high-alumina bricks and alumina-magnesia-carbon bricks. Due to the needs of multi-furnace continuous casting and smelting of clean steel, the capacity of ladles continues to expand, the variety of molten steel is increasing, the temperature of molten steel is increased, the residence time is prolonged, and the application of ladle refining technology makes the use conditions of ladles more stringent, and the life of ladles is greatly improved. The decline has affected the smooth progress of continuous casting. High alumina bricks are limited due to their low lifespan. During the "Eighth Five-Year Plan" period, the aluminum-magnesium-carbon bricks developed by Luoyang Refractory Research Institute were used in Baosteel's 300t lad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/02C04B35/10
Inventor 马军强陈路兵周磊张广智赵继增何会敏汪正峰孙凤春郝不景刘伟陶力群于华才
Owner 北京利尔高温材料股份有限公司
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