Porosity Of Corundum Block
Date:2016-01-27 15:46 From:Zhengzhou Sunrise Refractory Author:admin
Porosity is a measure of the effective open pore space in the refractory into which the molten metal, slag, fluxes, vapors etc can penetrate and thereby contribute to eventual degradation of the structure. The porosity of refractory is expressed as the average percentage of open pore space in the overall refractory volume.
High porosity materials tend to be highly insulating as a result of high volume of air they trap, because air is a very poor thermal conductor. As a result, low porosity materials are generally used in hotter zones, while the more porous materials are usually used for thermal backup.
Such materials, however, do not work with higher temperatures and direct flame impingement, and are likely to shrink when subjected to such conditions. Refractory materials with high porosity are usually NOT chosen when they will be in contact with molten slag because they cannot be penetrated as easily.
Zhengzhou Sunrise Refractory Co., Ltd. is mainly engaged in the research and development of glass refractory products. Sunrise as a professional glass refractory manufacturer can provide excellent products such as fused cast AZS block 33#,36#,41#, fused cast alumina block, silica brick, magnesia brick, zircon brick, corundum block, zircon mullite brick, mullite series brick, sillimanite brick, etc. which all have passed the ISO international certified.
High porosity materials tend to be highly insulating as a result of high volume of air they trap, because air is a very poor thermal conductor. As a result, low porosity materials are generally used in hotter zones, while the more porous materials are usually used for thermal backup.
Such materials, however, do not work with higher temperatures and direct flame impingement, and are likely to shrink when subjected to such conditions. Refractory materials with high porosity are usually NOT chosen when they will be in contact with molten slag because they cannot be penetrated as easily.
Zhengzhou Sunrise Refractory Co., Ltd. is mainly engaged in the research and development of glass refractory products. Sunrise as a professional glass refractory manufacturer can provide excellent products such as fused cast AZS block 33#,36#,41#, fused cast alumina block, silica brick, magnesia brick, zircon brick, corundum block, zircon mullite brick, mullite series brick, sillimanite brick, etc. which all have passed the ISO international certified.