The invention relates to a pre-
smelting process of electrolytic aluminum liquid. The pre-melting process of the electrolytic aluminum liquid comprises the following steps that (1) pre-alloying treatment is carried out, specifically, after the electrolytic aluminum liquid enters a transfer vacuum
ladle, pre-alloying treatment is carried out, and after intermediate
alloy is put into the transfer vacuum
ladle,
inert gas is blown into the transfer vacuum
ladle from a micropore gas permeable
brick at the bottom of the transfer vacuum ladle till the intermediate
alloy is completely molten; (2) blowing purification treatment is carried out, specifically, after the intermediate
alloy is completely molten, a covering agent is arranged on the surface of melt firstly, then the flow and pressure of the
inert gas are adjusted, and the flow and pressure of the
inert gas are controlled to be in a periodic hill peak mode of gradually increasing and then gradually decreasing; and (3) after blowing purification is finished, standing is carried out for 2 - 5 min, and then the covering agent is removed. According to the pre-
smelting process of the electrolytic aluminum liquid, the electrolytic aluminum liquid is pre-smelted in the transfer vacuum ladle, components are pre-adjusted, the gas content and the
slag content are reduced, and the melt cleanliness is improved so that the electrolytic aluminum liquid can be directly used for high-quality aluminum alloy production, production efficiency is high,
pollution is less, and cost is low.