Mining Engineers' Handbook, Volume 2Robert Peele, John Adams Church J. Wiley & sons, Incorporated, 1941 |
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Hasil 1-3 dari 68
Halaman 23-20
... less than 19 % O2 , as determined by sampling and analysis by U S Mining Supervisor . A mine or portion of a mine shall be deemed gassy , as defined by State Inspector or by Mining Supervisor , if on 3 occasions not less than 2 days ...
... less than 19 % O2 , as determined by sampling and analysis by U S Mining Supervisor . A mine or portion of a mine shall be deemed gassy , as defined by State Inspector or by Mining Supervisor , if on 3 occasions not less than 2 days ...
Halaman 6
... less , power consumption per ton is less in the jaw crusher . In coarser crushing to 5-12 in , power per ton crushed is less for gyratory than for jaw crusher . Repairs , cost of installation , and loss of head are all greater for ...
... less , power consumption per ton is less in the jaw crusher . In coarser crushing to 5-12 in , power per ton crushed is less for gyratory than for jaw crusher . Repairs , cost of installation , and loss of head are all greater for ...
Halaman 32-13
... Less a deduction of 1 1/2 per oz 6 Nothing paid for lead less than 5 % wet assay 7 Nothing paid for copper less than 1 / 2 % 8 Add 10 % to base charge for excess value over $ 25 per ton 90.1 % of wet - lead assay is free 10 Pay for all ...
... Less a deduction of 1 1/2 per oz 6 Nothing paid for lead less than 5 % wet assay 7 Nothing paid for copper less than 1 / 2 % 8 Add 10 % to base charge for excess value over $ 25 per ton 90.1 % of wet - lead assay is free 10 Pay for all ...
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AND SORTING OF ORES | 15 |
ELECTRIC POWER | 16-1 |
sion Wiring | 19-1 |
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adjustment Aerial Tramway anthracite approx assay aver borax buckets Bur Mines capac carriers cars charge chute claim coal mines 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 grade hoisting horiz intercooler labor lamp less litharge loaders loading lode long ton machine material 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 valve vein vertical wire zinc