Refractoriness under load of alumina-spinel castables

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InterCeram | / 11-13期

关键词：

Loads (forces) - Silica - Bearing capacity - Slags - Alumina - Refractory materials;

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摘要：

The temperature at which a fixed deformation occurs serves as part of quality specification for refractories. Four commercial quality aluminaspinel castables were investigated. A cylindrical specimen of 50 mm in height and 50 mm in diameter was heated up at a constant rate and a fixed load of 0.2 MPa. The experimental results indicate that the load bearing capacity at high temperatures decreases with decreasing slag resistance, while it increases with an increase in coarse aggregate content; the addition of silica to the bonding powders is very detrimental to load bearing capacity.

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