METHOD AND COMPOSITION FOR INORGANIC FIBER PRODUCING Russian patent published in 1998 - IPC

FIELD: inorganic chemistry and technology. SUBSTANCE: inorganic fiber is produced by minerals feeding into smelting furnace, melt making, its homogenization, feeding to zone of fiber making for its drawing from melt and the following winding on threat-receiver. Temperature in smelting furnace is 1705-2000 C. Fiber drawing is carried out at the rate 5505-6500 m/min. Composition for inorganic fiber producing has the following components, wt.-%: SiO₂, 55.30-60.1; Al₂O₃, 18.01-19.90; TiO₂, 0.02-1.02; Fe₂O₃ or FeO, 7.51-8.03; CaO, 4.52-9.50; MgO, 3.01-3.95; P₂O₅, 0.12-0.14; MnO, 0.10-0.15; K₂O, 1.40-3.60; and Na₂O, 1.80-1.90. Method provides fiber producing of thickness less 4 mcm. EFFECT: improved method of fiber producing, high quality of fibers. 2 cl, 3 tbl