Anti-oxidation high-bending-resistance iron runner castable

Abstract

The invention provides an anti-oxidation high-bending-resistance iron runner castable. The components of the castable comprise, in parts by weight, 20-30 parts of fused brown corundum with a particlesize of larger than 5 mm and less than or equal to 8 mm, 20-30 parts of fused brown corundum with a particle size of larger than 3 mm and less than or equal to 5 mm, 10-20 parts of fused brown corundum with a particle size of larger than 1 mm and less than or equal to 3 mm, 10-20 parts of fused brown corundum with a particle size of larger than 0 mm and less than or equal to 1 mm, 1-3 parts of calcium boride, and 1-10 parts of binder. Compared with the prior art, the beneficial effects of the present invention comprise that 1) the addition of calcium boride improves the strength and bulk density after treatment of each temperature section of the castable; 2) the addition of calcium boride promotes the high-temperature densification of the castable, so that the castable can obtain better oxidation resistance and higher high-temperature flexural strength; and 3) the addition of calcium boride can significantly improve the various properties of the iron runner castable, and when 2 parts of calcium boride is added, the castable has better comprehensive performance.

Description

technical field [0001] The invention relates to an iron ditch pouring material with high oxidation resistance and high bending resistance. Background technique [0002] Al 2 o 3 -SiC-C castable is widely used in blast furnace tapping trough, molten iron ladle lining and mixed iron slag line due to its excellent thermal shock resistance and slag resistance. The carbon introduced in the castable can prevent the slag from penetrating into the material, improve the corrosion resistance, thermal conductivity, and thermal shock resistance of the material, and reduce the structural spalling and cracking of the material. But carbon oxidation is also Al 2 o 3 -An important reason for the damage of SiC-C castables, so the introduction of antioxidants to enhance the oxidation resistance of materials is the key research content of the castables. As a commonly used antioxidant, calcium boride has been widely used in dolomite carbon and magnesia dolomite carbon refractories, but it h...

AI Technical Summary

Problems solved by technology

As a commonly used antioxidant, calcium boride has been widely used in dolomite carbon and magnesia dolomite carbon refractories, but it has not been reported in iron channel castables

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