MINERAL FIBER MATERIAL Russian patent published in 1999 - IPC

FIELD: heat-insulation materials. SUBSTANCE: mineral fiber material containing, wt %: silicon oxide 35.61-37.16, aluminum oxide 17.24-19.28, titanium dioxide 0.76-1.12, ferric oxide 3.14-3.25, ferrous oxide 0.84-1.57, calcium oxide 33.65- 36.48, magnesium oxide 1.74-2.51, sulfur trioxide 0.10-0.17, potassium oxide 1.54-2.28, and sodium oxide 0.49-1.12 is manufactured from coal and limestone production wastes. Fiber material has density 25-26 kg/cu. m and contains 4.12-6.72 nonfiber inclusions. EFFECT: utilized earlier useless waste. 3 tbl