English to Russian Tech/Engineering Metallurgy / Casting method for the purification of an aluminium alloy

For economic reasons, a smaller, highly impure waste stream is preferred over a larger less contaminated waste stream. However, *Al-Fe-additive intermetallics* contain a high amount of aluminium. In the usual, separately applied, process of separation of intermetallics, the solid-liquid separation would imply an even greater loss of aluminium.