(1) Intensive measurement of density and grain size of fabricated corundum along with industrial automation of powder density.
(2) With the crystallization of the cast corundum aggregate, the water demand resistance of the corundum-spinel castable; The density and the thermal shock resistance at room temperature become worse. Other corundum with a particle size density of 345 g·cm shows that the castables are of different sizes.
(3) Considering that the bulk density of sintered corundum is 3.51.55.55·cm3, so it cannot be a one-sided material to synthesize the bulk compact soil of corundum ~ 3.55.55.cm-3 is the volume compact gravel surface of corundum; High volume induces fire resistance. Thermal shock deteriorates and increases the unit weight of refractory properties.
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