Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Halaman 21-26
... Example 11. Copper Mining Costs Table 39. Miscellaneous Group ; Production and Costs , 1912 Cents per lb of copper Mine Tons of ore milled Yield per ton lb Cu Total pounds of Oper- Gold , copper produced ating silver cost credit Net ...
... Example 11. Copper Mining Costs Table 39. Miscellaneous Group ; Production and Costs , 1912 Cents per lb of copper Mine Tons of ore milled Yield per ton lb Cu Total pounds of Oper- Gold , copper produced ating silver cost credit Net ...
Halaman 21-32
... Example 20 ) .. " Indicated cost of copper " . 2 326 814 $ 16 765 290 12. 135 ¢ per lb of copper 12.400 ¢ 0.265 ¢ 66 66 Note : These figures show the great advantage Canadian copper producers have over competitors , because of the by ...
... Example 20 ) .. " Indicated cost of copper " . 2 326 814 $ 16 765 290 12. 135 ¢ per lb of copper 12.400 ¢ 0.265 ¢ 66 66 Note : These figures show the great advantage Canadian copper producers have over competitors , because of the by ...
Halaman 21-33
... Example 21. Iron Mining in Michigan Table 55. A Five - year Summary from Records of All Iron Mines Operating in ... Examples of these costs are EXAMPLES OF COSTS 21-33.
... Example 21. Iron Mining in Michigan Table 55. A Five - year Summary from Records of All Iron Mines Operating in ... Examples of these costs are EXAMPLES OF COSTS 21-33.
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AND SORTING OF ORES | 15 |
ELECTRIC POWER | 16-1 |
sion Wiring | 19-1 |
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