STONE CASTING Russian patent published in 2010 - IPC C03C3/93 C04B30/00 

FIELD: technological processes.

SUBSTANCE: invention is related to technology of silicates, in particular to compositions of stone casting, products of which may be used under effect of high temperatures. Stone casting, containing SiO₂, TiO₂, Al₂O₃, Fe₂O₃, FeO, CaO, MgO, Na₂O, K₂O, ZrO₂ and B₂O₃, at the following ratio of components, wt %: SiO₂ - 43.7-45.8; TiO₂ - 0.2-0.3; Al₂O₃ - 8.0-9.0; Fe₂O₃ - 1.0-2.0; FeO - 1.0-2.0; CaO - 8.0-9.0; MgO - 28.0-30.0; Na₂O - 1.0-2.0; K₂O - 1.0-2.0; ZrO₂ - 1.0-2.0; B₂O₃ - 1.0-2.0.

EFFECT: increased thermal resistance of products.

1 tbl