Method of producing silicon-containing aluminum alloy ingot

Abstract

Provided is a method of producing a silicon-containing aluminum ingot capable of preventing filter clogging that requires suspension of casting, suppressing aluminum loss, and reducing a content rate of phosphorus as an impurity in the obtained silicon-containing aluminum alloy ingot. The production method of the present invention includes a water-rinsing step for subjecting a silicon mass containing phosphorus as an impurity to a water-rinsing treatment, a molten metal formation step for obtaining molten metal by introducing, into a melting furnace, an alloy material including at least the silicon mass obtained through the water-rinsing step and an aluminum material and and melting the alloy material, and a casting step for obtaining a silicon-containing aluminum alloy ingot by casting the obtained molten metal.

1 . A method of producing a silicon-containing aluminum alloy ingot, comprising:
 a water-rinsing step for subjecting a silicon mass containing phosphorus as an impurity to a water-rinsing treatment;   a molten metal formation step for obtaining molten metal by introducing an alloy material including at least an aluminum material and the silicon mass obtained through the water-rinsing step into a melting furnace and melting the alloy material; and   a casting step for obtaining a silicon-containing aluminum alloy ingot by casting the obtained molten metal.   
     
     
         2 . The method of producing a silicon-containing aluminum alloy ingot as recited in  claim 1 , wherein,
 in the water-rinsing step, after performing the water-rinsing treatment of rinsing a surface of the silicon ingot containing phosphorus as an impurity with water, the silicon ingot is crushed to obtain a plurality of crushed objects, and   the crushed object is introduced into the melting furnace in the molten metal formation step.   
     
     
         3 . The method of producing a silicon-containing aluminum alloy ingot as recited in  claim 1 , wherein,
 in the water-rinsing step, after obtaining a plurality of crushed objects by crushing the silicon ingot containing phosphorus as an impurity, a water-rinsing treatment of rinsing surfaces of the crushed objects with water is performed, and   the crushed object after the water-rinsing treatment is introduced into the melting furnace in the molten metal formation step.   
     
     
         4 . The method of producing a silicon-containing aluminum alloy ingot as recited in  claim 1 , wherein a temperature of water used for the water-rinsing treatment is 5° C. to 90° C. 
     
     
         5 . A method of producing a silicon-containing aluminum alloy ingot, comprising:
 a molten metal formation step for obtaining molten metal by introducing an alloy material including at least an aluminum material and a water-rinsed silicon mass into a melting furnace and melting the alloy material; and   a casting step for obtaining a silicon-containing aluminum alloy ingot by casting the obtained molten metal.   
     
     
         6 . The method of producing a silicon-containing aluminum alloy ingot as recited in  claim 1 , wherein a content rate of phosphorus in the silicon-containing aluminum alloy ingot obtained by the casting is 5 ppm or less.