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Charging the round top furnace from above is quick and cuts heat loss at Alcan’s Oswego works. The crews can charge the furnace in less than six minutes from the time roof opening is initiated until it is back in place. The round design utilizes the shallow bath melting method and a convection type recuperator to cut fuel use and heat loss. (Photo courtesy Swindell Furnace Div. Davy McKee Equipment Corp.)