HEAT-INSULATING MIXTURE FOR CONTINUOUS CASTING OF STEEL Russian patent published in 2001 - IPC

FIELD: metallurgy, particularly, continuous casting of steel. SUBSTANCE: mixture comprises components, wt.%: carbon-containing material, 4-25; rice husk, 4-90; silicon-containing material, the balance. Silicon-containing material comprises, wt. %: CaO, 30.0-60.0; SiO₂, 20.0-50.0; Al₂O₃, 3.0-7.0; MnO, 0.5-5.0; MgO, 3.0-7.0; (Na₂O+K₂O), 0.1-2.0; C, 4.0-20.0; FeO, 0.1-5.0; F, 0.001-5.0; TiO₂, 0.1-2.0 at basicity of CaO/SiO₂ of 0.6-3.0. EFFECT: improved heat insulation of metal, macrostructure and quality of semiproducts and refining of metal in casting and intermediate ladles due to assimilation of nonmetallic inclusions into primary slime. 3 cl, 1 tbl