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- Preliminary separation of metals and nonmetals from urban refuse
- Recovery of the nonferrous metals from auto shredder rejects by air classification
- Improved cupric ammonium carbonate leaching of copper scrap
- Use of cryogens to reclaim nonferrous scrap metals
- Recovering metal from nonmagnetic auto-shredder reject
- Metal recovery by dismantling of scrapped starter motors, auto generators, and alternators