MEATBALL SEPARATORS

摘要

Copper is a valuable metal in many applications, but it can be poison in the steelmaking process. Too much copper in a heat can either soften or embrittle the steel batch-depending on the type of steel the mill is producing- and affect the surface quality of the finished metal. The effect of copper in steel is cumulative, and "there is no ... modern economically viable chemical process that readily removes copper once it is alloyed within steel," according to the Steel Recycling Institute (Pittsburgh). Copper's negative effects in steelmaking are a major concern for steel mills and the scrap processing companies, most notably shredder operators, that supply them. To address this problem, many recycling facilities are stepping up their efforts to cull the largest copper-containing culprit-meatballs-from their shredded ferrous streams.