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CONTINUOUS PROCESS FOR RECOVERING LEAD OR ZINC OR BOTH METALS FROM THEIR ORES OR FROM SLAG IN THE FORM OF METAL FUMES, WHEREBY THE CHARGE IS MIXED WITH FUEL.
CONTINUOUS PROCESS FOR RECOVERING LEAD OR ZINC OR BOTH METALS FROM THEIR ORES OR FROM SLAG IN THE FORM OF METAL FUMES, WHEREBY THE CHARGE IS MIXED WITH FUEL.