METHOD OF ALUMINIUM-SILICON ALLOY OBTAINMENT Russian patent published in 2010 - IPC C22C1/02 C22C21/02 

FIELD: metallurgy.

SUBSTANCE: invention refers to aluminium alloy production and can be applied in aluminium-silicon alloy manufacturing with the use of crystalline silicon. Method involves simultaneous feed of silicon-containing component in the form of crystalline silicon and halogenide-containing flux to aluminium or aluminium alloy melt, where the surface of crystalline silicon is previously coated with halogenide-containing flux layer, and the reactant obtained is fed to aluminium or aluminium alloy melt. Melt temperature is maintained within the range defined by formula: T_Me=T_{mp Me}+D×(T_mp. _flux:T_mp. _Me)⁵, where: T_Me is aluminium or aluminium alloy melt temperature, °C; T_mp. _Me is aluminium or aluminium alloy melting point, °C; T_mp. _flux is flux melting point, °C; D=(53÷85) is a fitted coefficient for calculation of melt temperature range, with D=53 for bottom point of melt temperature range and D=85 for top point of melt temperature range.

EFFECT: possible processing of any crystalline silicon fractions in casting production, with reduced aluminium and silicon loss, reduced power and time consumption in alloy production, reduced gas and non-metallic inclusion content in alloy, obtainment of fine homogeneous structure in cast products, expanded range of fluxes used, reduced flux consumption and slag output.

6 cl, 3 tbl, 3 ex