Method for quickly removing boron from silicon by introducing gas to Al-Si alloy

The invention discloses a method for quickly removing boron from silicon by introducing gas to Al-Si alloy, and belongs to the field of high-purity silicon production. The method is a process of refining silicon to remove boron in an alloy melt containing a reaction gas. The method comprises the steps of carrying out liquid-state alloying treatment on silicon and aluminum-based alloy melt; then, introducing the reaction gas, maintaining a certain blowing period, taking out the alloy melt, quickly solidifying, and pickling and separating to obtain high-purity silicon. According to the method, the operation temperature is 873-1673K, and is lower than the melting temperature of silicon. Compared with a traditional aluminum-silicon alloying method, the method has the advantages that the boron removal rate can be increased to 75 percent from 46 percent, the solidifying treatment time can be shorted, and the production efficiency can be improved.