C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 1/02 (2006.01) C22C 21/02 (2006.01)
Patent
CA 2424827
The invention concerns a method for preparing Al-Si alloys, by introducing into molten aluminium, at a temperature ranging between 700 and 850 ·C, metallurgical silicon grains having a particle-size distribution less than 10 mm, wherein the silicon grains, when they reach the molten aluminium temperature, exhibit the property of being fragmented into smaller grains. Said grains are preferably obtained by granulometric selection between 1 and 10 mm of the material obtained by granulating liquid silicon in water. The invention enables to increase the dissolving rate of silicon and to reduce impurities formed during the preparation process.
L'invention concerne un procédé d'élaboration d'alliages Al-Si, par introduction dans l'aluminium liquide, à une température comprise entre 700 et 850~C, de grains de silicium métallurgique de granulométrie inférieure à 10 mm, dans lequel les grains de silicium, lorsqu'ils atteignent la température de l'aluminium liquide, ont la propriété de se fragmenter en grains plus petits. Ces grains sont obtenus de préférence par sélection granulométrique entre 1 et 10 mm du matériau obtenu par granulation du silicium liquide dans l'eau. L'invention permet d'augmenter la vitesse de dissolution du silicium et de réduire les crasses formées lors de l'élaboration.
Invensil
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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