The invention discloses a method for manufacturing an immiscible
alloy ingot casting in an aluminothermic reduction-
slag refining mode, and belongs to the technical field of
metallurgy. The method comprises the following steps that (1) according to components of the immiscible
alloy ingot casting to be manufactured, metallic
oxide powder is prepared; (2) the metallic
oxide powder and
Al powder are mixed, and then slagging constituents are added; (3) a mixture of the slagging constituents and the
powder is put into a reactor, Mg powder is put on a
surface layer, under the
electromagnetic field effect,
open fire ignition is carried out, and a high-temperature melt body is obtained; (4) gold
slag smelting is performed on the high-temperature melt body under the
electromagnetic field effect, reduction
smelting slag on the upper layer is discharged by 30 percent to 50 percent of the total weight, and the smelted high-temperature melt body is obtained; (5) premelting slag is added to carry out refining and
impurity removing, meanwhile, deoxidizing agents are injected into the smelted high-temperature melt body, refining slag is removed, and a refining
alloy melt body is obtained; (6) forced
water cooling is carried out on the refining alloy melt body to be at the
room temperature, and then slag removing and
ingot extraction are performed. The method is easy to operate, low in requirement for technological conditions, low in cost and capable of rapidly manufacturing large-size immiscible alloy.