Bulletin of the American Institute of Mining Engineers, Issues 117-120The Institute, 1916 - Mineral industries |
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Page 1451
... average horizon reached being somewhere in the Devonian . There is a marked lagging of the oxidation at the eastern end , however , as here it does not reach the top Devonian . In this , the oxidation may be seen to correspond more ...
... average horizon reached being somewhere in the Devonian . There is a marked lagging of the oxidation at the eastern end , however , as here it does not reach the top Devonian . In this , the oxidation may be seen to correspond more ...
Page 1489
... . Not only have we been able to crush 400 tons per mill , but with 18 sections running the average daily dry tonnage for the month of May was 15,358 . We have a test section ( of two mills ) that showed for a H. KENYON BURCH 1489.
... . Not only have we been able to crush 400 tons per mill , but with 18 sections running the average daily dry tonnage for the month of May was 15,358 . We have a test section ( of two mills ) that showed for a H. KENYON BURCH 1489.
Page 1490
... average , yet it indi- cates what may be done in the future . Performance of Crushing Machines . - In view of the character of the ore and the fact that much of it is tough and more difficult to crush than the ordinary porphyry ores ...
... average , yet it indi- cates what may be done in the future . Performance of Crushing Machines . - In view of the character of the ore and the fact that much of it is tough and more difficult to crush than the ordinary porphyry ores ...
Page 1500
... average moisture content is 22 per cent . To the mine summary can be added the following covering the re- mainder of the plant : A present mill recovery on sulphides of 90 per cent . , or 85 per cent . on the total content ; finished ...
... average moisture content is 22 per cent . To the mine summary can be added the following covering the re- mainder of the plant : A present mill recovery on sulphides of 90 per cent . , or 85 per cent . on the total content ; finished ...
Page 1503
... capping .. 8.50 6.67 1.36 ( 3 ) Drawn clean to 1⁄2 capping . 8.50 6.67 1.10 ( 4 ) Drawn 10 tons each chute .. 11.00 8.62 0.79 Totals and average .. 109.00 85.48 1.74 TABLE 1. - Details of Test No. 3 ( Continued 10 GEORGE R. LEHMAN 1503.
... capping .. 8.50 6.67 1.36 ( 3 ) Drawn clean to 1⁄2 capping . 8.50 6.67 1.10 ( 4 ) Drawn 10 tons each chute .. 11.00 8.62 0.79 Totals and average .. 109.00 85.48 1.74 TABLE 1. - Details of Test No. 3 ( Continued 10 GEORGE R. LEHMAN 1503.
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Common terms and phrases
Abrigo acid actinolite alteration American Anaconda andesite aplite Ariz Arizona Meeting ARTHUR Asst average beds Bisbee Born bornite breccia burning calcite Cananea carbonate cent Chairman chalcocite chalcopyrite CHARLES chloritic chrysotile Coal Colo concentrates Cons Copper cristobalite crystals deposits Dept diabase dikes diorite discussion district Engr Engrg epidote Escabrosa fault flotation machines formation furnace Geological GEORGE Gold grains granite Heated igneous Institute iron leaching limestone magnetite manganese mass material metamorphism Miami mill mineral Mining Engineers operation orebodies oxidized paper phosphate plant Plate porphyry Present position production Proposed pulp pyrite quartz quartzite Reheated rhyolite sand schist School of Mines Section sediments sericite shaft shales shown silica silica brick slag slime Smelt smelter solution steel sulphides sulphur Supt surface Table tailings tank temperature tests tion tons tridymite Univ Utah veins Vice-Chairman West WILLIAM York zinc zone
Popular passages
Page 1892 - States as may be designated, and the Academy shall, whenever called upon by any department of the Government, investigate, examine, experiment, and report upon any subject of science or art, the actual expense of such investigations, examinations, experiments, and reports to be paid from appropriations which may be made for the purpose, but the Academy shall receive no compensation whatever for any services to the Government of the United States.
Page 1700 - That any person authorized to enter lands under the mining laws of the United States may enter and obtain patent to lands containing petroleum or other mineral oils, and chiefly valuable therefor, under the provisions of the laws relating to placer mineral claims...
Page 1467 - DISCUSSION OF THIS PAPER IS INVITED. It should preferably be presented in person at the New York meeting, February, 1916, when an abstract of the paper will be read.
Page 2086 - The American Society of Civil Engineers, the American Society of Mechanical Engineers, the American Institute of Electrical Engineers...
Page 1891 - ... increase of domestic production of articles and materials essential to the support of armies and of the people during the interruption of foreign commerce...
Page 1693 - ... no location of a mining claim shall be made until the discovery of the vein or lode within the limits of the claim located.
Page 2119 - February, 1917, when an abstract of the paper will be read. If this is impossible, then discussion in writing may be sent to the Editor, American Institute of Mining Engineers, 20 West 39th Street, New York, NY, for presentation by the Secretary or other representative of its author.
Page 1891 - Defense to supervise and direct investigations and make recommendations to the President and the heads of...
Page 1378 - Societies are open from 9 AM to 9 PM on all week-days, except holidays, from September 1 to June 30, and from 9 AM to 6 PM during July and August.
Page 2086 - LIBRARY. AMERICAN INSTITUTE OF ELECTRICAL ENGINEERS. AMERICAN SOCIETY OF MECHANICAL ENGINEERS. AMERICAN INSTITUTE OF MINING ENGINEERS.