METAL RECOVERY

摘要

A process for treating a metal recovery byproduct which contains solid ash constituents entrained in a melt comprising a major amount of a molten salt and a minor amount of molten metal in which the melt is filtered through a high-temperature filter apparatus containing a cylindrical rotating filter element to separately and continuously recover a filter cake containing the solid ash constituents and a molten filtrate containing the molten salt and molten metal. This molten filtrate may be directly recycled to the metal recovery process. The filter cake may be treated in an aqueous process to recover the salt therefrom for recycle to the metal recovery process. The invention is particularly applicable to the recovery of aluminum from its dross while removing ecologically damaging materials present in the ash.