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Carbon system aluminium spinel air permeable brick

A technology of aluminum spinel and breathable brick, which is applied in the field of iron and steel smelting, can solve problems such as airway blockage, and achieve the effects of reducing infiltration, good slag resistance and high strength.

Inactive Publication Date: 2006-02-22
UNIV OF SCI & TECH BEIJING
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  • Abstract
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Problems solved by technology

Solve the problem of airway blockage and improve the service life

Method used

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  • Carbon system aluminium spinel air permeable brick

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[0012] In order to illustrate this patent in detail, an example is given to illustrate. Specific examples are as follows:

[0013]

[0014] Marked in the table: the symbol *1 is SiC, SiO 2 , Fe 2 O 3 Sum. Symbol *2 is SiO 2 , CaO, Fe 2 O 3 The sum; 5% of pure aluminate cement 75 was added to the sample, and 20% of MA76 (Al 2 O 3 76% sintered magnesia-aluminum spinel). *3 is the result of the slag leaching experiment at 1600℃×6h, in which the steel slag composition (mass percentage, %) is: CaO: 51.64, SiO 2 : 25.9, Al 2 O 3 : 10.62, Fe 2 O 3 : 2.67, MgO: 5.74.

[0015] For breathable bricks, one of the main factors affecting its service life is the resistance to slag penetration. If the slag penetrates deeply, the infiltrated slag will degenerate 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 erosion. If the slag penetration depth is shallow, less airway blockag...

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Abstract

The invention provides an air brick of aluminum spinelle carbon architecture comprising Al2O3, C, MgO and other constituents, wherein the mass fraction of each components are, Al2O3 55-90%, C 2-16%, MgO 1-20%, and other constituents 2-10% including SiC, SiO2, Fe2O3 and oxidation prevention addition agent, which is Al or Al-Mg alloy and is counted in by the form of Al2O3 and MgO during detecting procedure. The invention increases the length of effective brick and operating life.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and particularly provides an aluminum spinel carbon system breathable brick, which is used for the argon blowing treatment process of molten steel in iron and steel smelting. technical background [0002] Patent CN1039480C discloses the patent of breathable brick for ladle. The ventilating brick is ventilated by the vertical layer-shaped gap forming the vent channel, and its material is a chrome-corundum-mullite material fired at a high temperature; the component (weight %) of the material: electric power with a particle size ≤ 3mm Fused corundum 35~75%, α-Al with particle size <10um 2 O 3 3~20%, fused mullite with particle size ≤3mm 5~30%, industrial pure chromium oxide with particle size ≤0.2mm 0.5~7%, and bound clay with particle size ≤0.1mm ≤10%. Since this material has strong Fe when in contact with slag 2 O 3 Therefore, the working end of the material is deteriorated due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/103F27D1/04B22D41/58
Inventor 陈俊红李志坚孙加林
Owner UNIV OF SCI & TECH BEIJING
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