A high quality unburned brick for EAF (electric arc furnace) roof has been developed by using high grade bauxite chamotte as the main starting material ,adding industrial alumina powder to strengthen the matrix ,intro...A high quality unburned brick for EAF (electric arc furnace) roof has been developed by using high grade bauxite chamotte as the main starting material ,adding industrial alumina powder to strengthen the matrix ,introducing a suitable amount of sillimanite and compound M and adopting high effective composite binder,The brick has apparent porosity 17%,bulk density 2.88 g/cm^3,refratoriness under load (3% deformation) 1560℃ and thermal shock resis-tance over 30 cycles.The mechanism of improving the spalling resistance is also discussed,The brick has been applied at 30 t EAF roofs,resulting in average service life of 145 heats ,the maximum 210 heats.展开更多
文摘A high quality unburned brick for EAF (electric arc furnace) roof has been developed by using high grade bauxite chamotte as the main starting material ,adding industrial alumina powder to strengthen the matrix ,introducing a suitable amount of sillimanite and compound M and adopting high effective composite binder,The brick has apparent porosity 17%,bulk density 2.88 g/cm^3,refratoriness under load (3% deformation) 1560℃ and thermal shock resis-tance over 30 cycles.The mechanism of improving the spalling resistance is also discussed,The brick has been applied at 30 t EAF roofs,resulting in average service life of 145 heats ,the maximum 210 heats.
