Mining Engineers' Handbook, Volume 1Robert 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 ¢ 44 ** Note : These figures show the great advantage Canadian copper producers have over competitors , because ...
... Example 20 ) .. " Indicated cost of copper " . . . . . . . 2 326 814 $ 16 765 290 12. 135 ¢ per lb of copper 12.400 € 0.265 ¢ 44 ** Note : These figures show the great advantage Canadian copper producers have over competitors , because ...
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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COMPRESSED AIR PRACTICE | 15-2 |
Appli | 15-15 |
Hydraulic Compressors | 15-22 |
Hak Cipta | |
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adjustment Aerial Tramway anthracite approx assay aver borax buckets Bur Mines capac carriers cars charge chute claim coal mines compressed compressor concentrate conveyer copper cost crusher crushing cu ft cupel cyanide deflection diam discharge distance drill dust elev engineer explosions feed filter fire firedamp gold hoisting horiz intercooler labor lamp less litharge loaders loading lode long ton machine mechanical metal method mill mineral motor operation pipe plant plate plumb-bob pump pyrite rock safety lamps sample screen shaft sheave short ton side silver sizes Sodium carbonate solution speed station steel stopes surface survey Table tape telescope temp tension tests timber tion tons Total towers track cable traction rope tramway Trans transit traverse underground usually vein vertical wire zinc