Tungsten Recycling in the United States in 2000. Flow Studies for Recycling Metal Commodities in the United States Open file rept

摘要

This report, which is one of a series of reports on metals recycling, defines and quantifies the 2000 flow of tungsten-bearing materials in the United States from imports and stock releases through consumption and disposition with particular emphasis on the recycling of industrial scrap (new scrap) and used products (old scrap). Because of tungsten's many diverse uses, numerous types of scrap were available for recycling by a wide variety of processes. In 2000, an estimated 46 percent of U.S. tungsten supply was derived from scrap. The ratio of tungsten consumed from new scrap to that from old scrap was estimated to be 20:80. Of all the tungsten in old scrap available for recycling, an estimated 66 percent was either consumed in the United States or exported to be recycled.