Powder spraying, refining and calcium removing method used for aluminium alloy material

The invention relates to a powder spraying, refining and calcium removing method used for an aluminium alloy material. The method provided by the invention comprises the following steps of: placing a mixture of a powdery refining agent and a calcium removing agent into a refining and powder spraying machine, adjusting the nitrogen flow, the refining agent and the calcium removing agent, directly spraying powder to the bottom of a smelting furnace by utilizing nitrogen as a carrier, and degassing and removing impurities and calcium while the nitrogen floats upward from the bottom of the smelting furnace. By utilizing the method provided by the invention, molten aluminium degassing, deslagging and calcium removing processes are carried out at the same time, the efficiency is high, the refining effect is better, the smelting time of aluminium alloy is greatly shortened, the energy consumption is saved, the labour productivity is improved, and the alloy quality is obviously improved.