STONE CASTING Russian patent published in 2009 - IPC C03C3/112 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of silicates, specifically to stone casting compositions, products of which can be used at high temperature. The stone casting contains SiO₂, TiO₂, Al₂O₃, Fe₂O₃, FeO, CaO, MgO, Na₂O, K₂O, F₂, in the following ratio, wt %: SiO₂ - 41.2-47.7; TiO₂ - 1.2-1.4; Al₂O₃ - 10.0-14.0; Fe₂O₃ 10.0-12.0; FeO - 0.4-1.0; CaO - 3.0-4.0; MgO - 18.0-20.0; Na₂O - 1.2-1.4; K₂O 6.0-7.0; F₂ - 0.2-0.3.

EFFECT: increased thermal stability of the products.

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