| 摘要 |
A fused refractory consists of at least 60 wt. per cent MgO, at least 15% Cr2O3, less than 4% SiO2, less than 5% Al2O3, less than 6% Fe2O3, and less than 3% CaO, the refractory consisting of small, closely packed, mostly attached crystals of periclase which crystals are characterized by extensive exsolved separate and discrete spinel deposits throughout and the boundary areas between contiguous periclase crystals being characterized by extensive enhedral spinel crystal development forming with the periclase crystals an intergrown network isolating contained silicates into dispersed pockets. The fused mixture may be crushed and graded to form a brickmaking batch with a temporary binder, e.g. water and lignin solids. |
