The invention relates to an additive for
smelting aluminium alloy and a preparation method and an application method thereof, relating to the technical field of nonferrous
alloy manufacturing with a special additive. The additive is composed of
metal powder, cosolvent, heat-generating agent, detonating agent and
moisture proof agent. The preparation method comprises the following steps: raw materials comprising the following by
mass percentage, 70-81.5% of
metal powder, 15-20% of cosolvent, 2-5% of heat-generating agent, 1-3% of detonating agent and 0.5-2% of
moisture proof agent, are fully mixed evenly into compound
powder with a
ball mill, and the mixture is put into a mould, and is performed with cold pressing by a
hydraulic pressure machine so as to obtain the additive for
smelting aluminium alloy. The application method of the invention comprises the following steps: a
graphite crucible filled with a pure
aluminium pig is arranged in a resistance furnace to be heated until the aluminium pig is melted into aluminium liquid, and then the additive is added to react with the aluminium liquid so as to obtain
aluminium alloy. Under the condition that the quality of
aluminium alloy is not lowered, the additive solves the problems of high dissolving temperature, low absorptivity and unstable absorptivity of the additive.