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Aluminium and / or zirconium carbon system air permeable brick

A technology of breathable brick and zirconium carbon is applied in the field of iron and steel smelting, which can solve the problems of gas channel blockage and inability to ventilate, and achieve the effects of improving service life, improving working conditions and stable volume.

Inactive Publication Date: 2006-05-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solve the problem that the gas channel is blocked due to the expansion of the permeable layer and cannot be ventilated, and increase the service life and improve working conditions

Method used

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  • Aluminium and / or zirconium carbon system air permeable brick

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specific Embodiment

[0015] In order to set forth this patent in detail, an example is given for illustration. Specific examples are as follows:

[0016]

[0017] "*1" in the table means SiC, SiO 2 , Fe 2 o 3 and so on. "*2" is SiO2 2 , CaO, Cr 2 o 3 , Fe 2 o 3 and so on; add Cr to the sample 2 o 3 4.5%, while the addition of pure aluminate cement 75 is 6%. "*3" is the result of slag leaching experiment at 1600℃×6h, in which the composition of steel slag is: CaO51.64, SiO 2 25.9, Al 2 o 3 10.62, Fe 2 o 3 2.67, MgO5.74.

[0018] For breathable bricks, one of the main factors affecting their service life is the resistance to slag penetration. If the slag penetrates deeply, the infiltrated slag will denature the material and form a metamorphic layer, which will block the air passage and must be treated by "burning oxygen", which will lead to excessive corrosion. And if the penetration depth of slag is shallow, less airway blockages will be broken by argon, and the purpose of vent...

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Abstract

The invention provides an aluminum and / or zirconium carbon system breathable brick, characterized in that: made of Al 2 o 3 , C, ZrO 2 and other components, its chemical composition mass fraction is: Al 2 o 3 : 0-90%, C: 3-15%, ZrO 2 : 0-90%, other ingredients: 3-20%. Other components include SiC, SiO 2 , Fe 2 o 3 , Si, B 4 c. The invention has the advantages that: by introducing aluminum and / or zirconium-carbon system materials into the air-permeable bricks, the penetration and adhesion of molten slag into the bricks is reduced, clogging is prevented, and the service life is improved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular provides an aluminum and / or zirconium carbon system breathable brick. It is used in the argon blowing treatment process of molten steel in iron and steel smelting. technical background [0002] Permeable bricks are the key functional elements in the refining process outside the furnace. Two important factors to judge the performance of the air brick are the repeated blowing rate and service life. [0003] There are three main types of air permeable bricks: diffuse type, slit type and straight-through type. Since the diffused air permeable brick achieves the purpose of ventilation through the through pores in the brick body, it has poor corrosion resistance, low service life and less application. The current air-permeable bricks are mainly straight-through type and slit type, and the materials are mainly corundum, chrome corundum, corundum-spinel series, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/106C04B35/48C21C5/48F27D1/04
Inventor 陈俊红孙加林李志坚
Owner UNIV OF SCI & TECH BEIJING