RAW MEAL FOR MANUFACTURING CERAMIC WALL PARTS Russian patent published in 2001 - IPC

FIELD: manufacture of ceramic wall materials. SUBSTANCE: used as raw materials for raw meal are micro silica (crystalline silicon production waste) and spill of broken waste carbonic fettling, its chemical composition is as follows, mas.%: SiO₂, 22.40; Al₂O₃, 15.01; Fe₂O₃, 2.05; CaO, 2.60; MgO, 1.58; F, up to 15; Na, up to 15; C, up to 67; proportion of components is as follows, mas. %: micro silica (crystalline silicon production waste), spill of broken waste carbonic fettling, 20-30. Components are mixed up in dry condition, moistened to 16 %, specimens are molded using dry compaction method, dried out, and burned at 900 C. Physical characteristics are as follows: mean density, 1100-1200 kg/m³; compression strength, 8.8-14.6 MPa; water-absorption, 19.5-26.9; frost-resistance, over 75 cycles. EFFECT: improved frost-resistance. 2 tbl, 1 ex