RAW MIXTURE FOR HEAT-INSULATING MATERIAL PRODUCING Russian patent published in 1997 - IPC

FIELD: refractory materials. SUBSTANCE: raw mixture has, wt.-%: mineral fiber, 5-15; finely ground magnesite, 5-17; highly dispersed silica dust, 5-20; chamotte, 5-10; sodium silicofluoride, 1-5; and water glass, the balance. Mullite-siliceous wool is used as mineral fiber. Properties: compression strength limit is increased from 40 to 45-52 kgf/$$$, heat conductivity coefficient is decreased from 0.20 to 0.13-0.17 Wt/m x degree. Material is used for protection of working surfaces from high temperatures effect. EFFECT: improved quality and property of material. 2 cl, 1 tbl