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Solvent extraction of nickel and zinc from a waste phosphate solution
Recovery of phosphates and metals from waste phosphate sludge by reduction-sinter processes
Recovery of phosphates and metals from phosphate sludge by solvent extraction
Recovery of zinc, copper, and lead-tin mixtures from brass smelter flue dusts
Recovery of zinc, copper, silver, and iron from zinc smelter residue
Converting stainless steel furnace flue dusts and wastes to a recyclable alloy