Metal Bearing Waste Streams: Minimizing, Recycling and by M. Meltzer

By M. Meltzer

Analyzes choices to land disposal of harmful steel waste streams, concentrating on how you can hinder waste iteration. resource aid, recycling and therapy thoughts are lined.

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Extra resources for Metal Bearing Waste Streams: Minimizing, Recycling and Treatment (Pollution Technology Review) (No 196)

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Nickel is used in high resistance heating elements, glass-ta-metal seals, batteries, and specialty steels for power generation equipment. Household appliances employ stainless and electroplated steel containing nickel. Cobalt finds applications in permanent magnet production, and in sealing glass to metal. Zinc is used in galvanized and ferrous castings, die-cast parts, brass wire, dry cell battery cases, soldering flux, CRT phosphors, and zinc ferrite inductors. 10 TRANSPORTATION EQUIPMENT Transportation equipment manufacturers produce vehicles for movement of passengers and cargo by land, air, and water.

Depending on the means of removal, this metal will either be in the form of large blocks or as small granules. To reduce metal losses, some foundries sort through the slag and remove pieces of metal for remelting. Other foundries have investigated the recharging of the entire mass to the remelting furnace (Stephens 1988). Inside the furnace, calcium hydroxide forms in the slag as the recycled calcium carbide either removes additional sulfur or is directly oxidized. While this method has been successful, much work still remains to be done.

623 Miscellaneous Manufacturing PIpelines. £':cept Natural Gas Eloc. 550 ::J Sources ,. :sl"less Patterns 1983 - California. S. Dept. of Commerce. Bureau of the Census. Sept. 1985. S. Dept. of the Interior r-+ -. o a. c (") ~. o ::J 12 Metal-Bearing Waste Streams than seek ways to treat and dispose of them. Adding to this trend is the continuing liability that generators face for their wastes, even after they have shipped them to a disposal site. A listing of State and Federal regulations applicable to the management of metal wastes is included in Appendix E.

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