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Castable for steel ladle cover and application thereof

A ladle cover and castable technology, applied in the field of refractory materials, can solve problems such as increased cost demand, castable spalling, thermal deformation of ladle steel structure, etc., and achieves the effects of improving service life, small expansion coefficient and reducing thermal stress.

Active Publication Date: 2014-08-13
LIAONING ZHONGMEI HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, heavy castable structures, castable fiber blanket composite structures, and refractory fiber blanket structures are often used. Although these methods solve the problem of molten steel temperature drop to a certain extent, due to the harsh environment in which the ladle cover is used , high thermal radiation temperature of molten steel, heavy ladle cover, alternating use of cold and hot, etc., will cause the heavy castable structure of the ladle cover to peel off or even collapse, and the steel structure of the ladle will be deformed by heat. The fiber blanket used for the ladle cover The structure has long-term fiber shrinkage and shedding, which affects the service life and increases the cost demand

Method used

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  • Castable for steel ladle cover and application thereof
  • Castable for steel ladle cover and application thereof
  • Castable for steel ladle cover and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A kind of casting material for ladle cover and its application

[0016] (1) A castable for ladle cover

[0017] 1. The main material is composed of the following raw materials by weight percentage:

[0018]

[0019] 2. The castable for ladle cover is composed of main material, sodium tripolyphosphate and heat-resistant stainless steel fiber. The addition of sodium tripolyphosphate is 0.3% of the total weight of the main material, and the addition of heat-resistant stainless steel fiber is 0.8% of the total weight of the main material.

[0020] (2) A ladle cover

[0021] Preparation method: Mix alumina hollow spheres, mullite, Guangxi mud, andalusite, silicon carbide, aluminum titanate, pure calcium aluminate cement, silica micropowder, α alumina micropowder, sodium tripolyphosphate and heat-resistant stainless steel fiber After stirring evenly, put it into the mixer and add an appropriate amount of water to continue stirring to form a workable slurry....

Embodiment 2

[0023] Embodiment 2 A kind of casting material for ladle cover

[0024] (1) A castable for ladle cover

[0025] 1. The main material is composed of the following raw materials by weight percentage:

[0026]

[0027] 2. The castable for ladle cover is composed of main material, sodium tripolyphosphate and heat-resistant stainless steel fiber. The addition amount of sodium tripolyphosphate is 0.5% of the total weight of the main material, and the addition amount of the heat-resistant stainless steel fiber is 0.5% of the total weight of the main material.

[0028] (2) A ladle cover

[0029] The preparation method is the same as in Example 1.

[0030] Practice has proved that the ladle cover that passed the inspection was used for 450 times without major repairs in the whole process of covering at Fujian Sanming Steel Plant, the surface structure is complete, there is no peeling and cracking phenomenon, and the steel structure of the ladle cover is in good shape; after being...

Embodiment 3

[0031] Embodiment 3 A kind of casting material for ladle cover

[0032] (1) A castable for ladle cover

[0033] 1. The main material is composed of the following raw materials by weight percentage:

[0034]

[0035] 2. The castable for ladle cover is composed of main material, sodium tripolyphosphate and heat-resistant stainless steel fiber. The addition amount of sodium tripolyphosphate is 0.5% of the total weight of the main material, and the addition amount of the heat-resistant stainless steel fiber is 0.5% of the total weight of the main material.

[0036] (2) A ladle cover

[0037] The preparation method is the same as in Example 1.

[0038] Practice has proved that the ladle cover that passed the inspection was used for 450 times without major repairs in the whole process of covering at Fujian Sanming Steel Plant. Cracking fine lines and spalling occur, and the steel structure of the ladle cover has no thermal deformation.

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Abstract

The invention discloses a castable for a steel ladle cover and application thereof. The castable for the steel ladle cover is prepared from a main material, sodium tripolyphosphate and heat-resistant stainless steel fibers, wherein the main material contains alumina hollow spheres, mullite, Guangxi mud, andalusite, silicon carbide, aluminum titanate, pure calcium aluminate cement, silicon micropowder and alpha alumina micropowder, the content of sodium tripolyphosphate is 0.1-0.5% of the total weight of the main material, and the content of the heat-resistant stainless steel fibers is 0.5-1.5% of the total weight of the main material. The steel ladle cover prepared by adopting the castable for the steel ladle cover has the advantages of low heat accumulation, light dead weight, good heat shock stability, no peeling, excellent high-temperature resistance, high high-temperature resistant strength and the like, and the service life of the steel ladle cover can be effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a casting material for a ladle cover and an application thereof. Background technique [0002] The role of the ladle is to undertake the molten steel from the upstream steelmaking furnace and transport the molten steel to the refining equipment outside the furnace or the steel pouring site. However, with the development of continuous casting and refining technology outside the furnace, the ladle is not only used as a high-temperature container for storing and transporting molten steel, but also has Metallurgical equipment with specific functions, many molten steel refining processes are completed in ladles. In recent years, due to excess steel production capacity, the profits of various steel mills have gradually decreased, and even losses have occurred. With the development of continuous casting technology, the structural optimization of production techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26
Inventor 吴井强罗伟金耀东付宇张英佳刘喜临王树山
Owner LIAONING ZHONGMEI HLDG