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为了熔制铝合金铸铁,首先在坩埚中熔化铝,并将铝液表面上的渣滓除掉,然后在每25公斤的铝液中加入20—30公分氯化锌净化。
In order to melt the aluminum alloy cast iron, aluminum is first melted in the crucible and the residue on the surface of the molten aluminum is removed. Then, zinc chloride of 20-30 cm is added to every 25 kg of molten aluminum.