STONE CASTING Russian patent published in 2009 - IPC C03C3/00 

FIELD: metallurgy.

SUBSTANCE: invention concerns contents of stone casting. Products, made of this casting can be used in conditions of high temperatures and corrosive medium effect. Stone casting contains following components, wt %: SiO₂ - 50.0-52.0; TiO₂ - 0.6-1.0; Al₂O₃ - 4.0-5.0; Fe₂O₃ - 10.5-11.9; FeO - 0.4-1.0; CaO - 3.1-4.5; MgO - 9.0-11.0; Na₂O - 2.0-2.5; K₂O - 3.5-4.0; F₂ - 4.2-4.3; ZrO₂ - 2.8-3.5; B₂O₃ - 5.0-6.0.

EFFECT: increasing of thermostability and chemical stability of stone casting.

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