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Profile of the Nonferrous Metals Industry. EPA Office of Compliance Sector211 Notebook Project

机译：有色金属行业概况。美国环保署合规部门211笔记本电脑项目

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The Standard Industrial Classification (SIC) code 33 is composed of211u001eestablishments that engage in: the primary and secondary smelting and refining of 211u001eferrous and nonferrous metal from ore or scrap; rolling, drawing, and alloying; 211u001eand the manufacturing and casting of basic metal products such as nails, spikes, 211u001ewire, and cable. Primary smelting and refining produces metals directly from 211u001eores, while secondary refining and smelting produces metals from scrap and 211u001eprocess waste. Scrap is bits and pieces of metal parts, bars, turnings, sheets, 211u001eand wire that are off-specification or worn-out but are capable of being 211u001erecycled.

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