The Evaluation of Hot Dross Processing Systems

On site Hot Dross Processing systems (HDP) can offer a method for significant environmental savings with on site aluminum recovery. HDP often can eliminate the remelting of the recovered sows or at worst take advantage of the retained heat in the poured off sow. The most advantageous systems offer productive end use of the dross oxides and aluminum fines left in the residual materials after the aluminum is recovered. All of these systems offer significant environmental advantages over pan cooling or dross pressing of materials that simply change the form of the aluminum and require further off site rotary salt furnace processing. There are four HDP systems that will be reviewed in this paper. Hot dross stirrers Hot dross stirrers plus dross coolers/size separators Hot dross rotary furnace operations TAHA hot dross mixer, cooling and sizing