RAMMING MIXTURE FOR INDUCTION FURNACE LINING Russian patent published in 1999 - IPC

FIELD: refractory materials. SUBSTANCE: invention, in particular, relates to refractory materials for ramming crucibles of induction furnaces in cast iron and steel smelting processes. Ramming mixture contains, wt %: crystalline quartzite, 70-75; zircon concentrate, 20-25; additionally, sodium tripolyphosphate as mineralizer, 0.5-2.0; and kaolin as plasticizer, 3- 5. Average size of grains contained in ramming mixture are: crystalline quartzite 0.14-0.23 mm and zircon concentrate 0.05-0.063 mm. EFFECT: increased lining endurance and reduced its sintering in near-induction zone. 2 cl, 2 tbl