摘要: The WMAC team at the University of Tennessee performed an assessment at a plant manufacturing penny blanks, dry cell battery cans, and other zinc products--approximately 120 million 1b/yr. Zinc ingots and scrap zinc are melted in ... 展开 The WMAC team at the University of Tennessee performed an assessment at a plant manufacturing penny blanks, dry cell battery cans, and other zinc products--approximately 120 million 1b/yr. Zinc ingots and scrap zinc are melted in an electric furnace. The molten zinc is formed into coils of strip for further procesing or sale to industrial customers. The circular penny blanks are formed in a press, upset to form a rim on the edge, copper plated, and visually inspected. Battery can blanks are pressed from the strip, drawn into can shape, cleaned, and dried. The team's report, detailing findings and recommendations, indicated that the most waste was generated as dross in melting the zinc and that the greatest savings could be obtained by reducing drag-out from the plating tanks to reduce downstream sludge formation and installing driers to dewater the sludge before shipment for disposal. 收起