| 摘要 |
PROBLEM TO BE SOLVED: To obtain a eastable refractory that can insure sufficient fluidity, the crude particles are prevented from separating from the fine particles, by specifying the formulation of crude particles, medium-size particles and fine particles in a specific proportion. SOLUTION: This castable refractory comprises (A) 24-32 wt.% of crude particles with particle sizes of 12.0-2.5 mm, (B) 8-16 wt.% of medium-size particles with particle sizes of 2.5-1.0 mm, (C) 17-30 wt.% of fine particles with particle sizes of' 1.0-0.075 mm and (D) the rest of most fine particles with particle sizes of <0.075 mm. There is no specific restriction in the refractory raw materials to be used and alumina, magnesia, spinel, chromium ore, mullite, chamotte, buhlstone, agalmatolite, and the like can be used single or in combination. There is no restriction in binders and dispersant to be used as a bonding agent. The binder is, for example, alumina cement, phosphate salt, water glass and the like. The dispersant is, for example, sodium hexa-metaphosphate, sodium alkylbenzene-sulfonate and the like. |
