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Refractory material for ladle and preparation method thereof

A refractory material and ladle technology, applied in the field of refractory materials, can solve the problems of aggravating safety hazards, difficult handling, high thermal conductivity, etc., and achieve the effect of ensuring service life and effect, reducing manufacturing cost, and good volume stability

Active Publication Date: 2017-01-18
山东硒拓新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fired aluminum silicon carbide bricks and mullite silicon carbide bricks, because they contain silicon carbide, have been greatly improved in terms of corrosion resistance and erosion resistance, but due to their large elastic modulus and large thermal expansion coefficient, they are often used in cold ladles. During the heat exchange process, the metamorphic layer is easily separated from the original brick layer, resulting in spalling, resulting in uneven erosion on the surface of the working layer, which greatly reduces the service life
Unstable furnace life, aggravating potential safety hazards
Due to its excellent comprehensive performance, non-fired aluminum silicon carbide carbon bricks have been widely used in major steel mills, but because they contain carbon materials such as graphite, they are easy to oxidize and become loose and loose in the parts exposed to the air such as slag lines. It is the first to be corroded, and the anti-scouring ability drops sharply. At the same time, when it contains carbon, the thermal conductivity is high, which is easy to cause high furnace shell temperature, large heat loss, easy to pack, and it is very difficult to handle, resulting in passive production. Steel mills with long molten iron turnover routes are especially prominent

Method used

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  • Refractory material for ladle and preparation method thereof
  • Refractory material for ladle and preparation method thereof
  • Refractory material for ladle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A refractory material for ladle, made of the following raw materials,

[0031]

[0032] Preparation:

[0033] (1) Mix silicon carbide, alumina micropowder, metal silicon, Guangxi white mud and andalusite fine powder with a particle size of -200 mesh evenly.

[0034] (2) Mix the burnt gem particles with a particle size of 1.0-3.0mm, the burnt gem particles with a particle size of 0.1-1mm, and the andalusite particles with a particle size of 0.1-1mm, add a binder and water, stir evenly, and then Add the mixture obtained in step (1), and continue to stir for 5 minutes; wherein, the binding agent is sulfurous acid pulp waste liquid, and the addition accounts for 40% of the total mass of coke gemstone, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and metal silicon. 2%; water accounts for 3% of the total mass of coke gemstone, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and metal silicon.

[0035] (3) The agitated mixture ob...

Embodiment 2

[0037] A refractory material for ladle, made of the following raw materials,

[0038]

[0039] Preparation:

[0040] (1) Mix silicon carbide, alumina micropowder, metal silicon, Guangxi white mud and andalusite fine powder with a particle size of -200 mesh evenly.

[0041] (2) Mix the burnt gem particles with a particle size of 1.0-3.0mm, the burnt gem particles with a particle size of 0.1-1mm, and the andalusite particles with a particle size of 0.1-1mm, add a binder and water, stir evenly, and then Add the compound that step (1) obtains, continue to stir 3min; Wherein, binding agent is sulfurous acid paper pulp waste liquid, and the addition accounts for coke gemstone, andalusite, Guangxi white mud, silicon carbide, aluminum oxide micropowder and metal silicon total mass 2%; water accounts for 3% of the total mass of coke gemstone, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and metal silicon.

[0042] (3) The agitated mixture obtained in step (2...

Embodiment 3

[0044] A refractory material for ladle, made of the following raw materials,

[0045]

[0046] Preparation:

[0047] (1) Mix silicon carbide, alumina micropowder, metal silicon, Guangxi white mud and andalusite fine powder with a particle size of -200 mesh evenly.

[0048] (2) Mix the burnt gem particles with a particle size of 1.0-3.0mm, the burnt gem particles with a particle size of 0.1-1mm, and the andalusite particles with a particle size of 0.1-1mm, add a binder and water, stir evenly, and then Add the compound that step (1) obtains, continue to stir 3min; Wherein, binding agent is sulfurous acid paper pulp waste liquid, and the addition accounts for coke gemstone, andalusite, Guangxi white mud, silicon carbide, aluminum oxide micropowder and metal silicon total mass 2%; water accounts for 3% of the total mass of coke gemstone, andalusite, Guangxi white mud, silicon carbide, alumina micropowder and metal silicon.

[0049] (3) The agitated mixture obtained in step (2...

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Abstract

The invention belongs to the technical field of refractory materials, and particularly relates to a refractory material used for a ladle and a preparation method of the refractory material. The refractory material is prepared from the following materials in percentage by weight: 35-63% of flint clay, 12-35% of andalusite, 5-10% of Guangxi white mud, 7-16% of silicon carbide, 3-8% of alumina micro powder and 2-4% of anti-oxidant metal. The refractory material has the characteristics of good size stability, peelingresistance, anti-corrosion, no adhering slag and good thermal insulation. The preparation method is simple in process and easy to conduct.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a refractory material used for ladles and a preparation method thereof. Background technique [0002] Ladle is a kind of transportation equipment for molten iron. It mainly transports molten iron from blast furnace to converter or mixed iron furnace. With the improvement and development of steelmaking process, sometimes ladle will also undertake the pretreatment task of molten iron, mainly for For desulfurization, the temperature fluctuation range of molten iron during transportation is 1350-1510°C. [0003] At present, the refractory materials for traditional ladles mainly use high alumina bricks, fired aluminum silicon carbide bricks, and unfired aluminum silicon carbide carbon bricks. Due to the characteristics of the material itself, high-alumina bricks are not satisfactory in terms of erosion resistance, erosion resistance, and peeling resistance. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 仲卫军潘之雄梁志华岑松恒陆富汉
Owner 山东硒拓新材料科技有限公司
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