词条	Concentration factors for ore bodies of common metals
释义	Concentration factors for ore bodies of common metals Table Concentration factors for ore bodies of common metals metal percent in Earth's crust minimum percent profitably extracted enrichment factor necessary for an ore body aluminum 8.13 30 4 iron 5.00 30 6 manganese 0.10 35 350 chromium 0.02 30 1,500 copper 0.007 1 140 nickel 0.008 1.5 175 zinc 0.013 4 300 tin 0.004 1 250 lead 0.0016 4 2,500 uranium 0.0002 0.1 500 See as table:
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