Report on the Molybdenum Ores of CanadaGovernment Print. Bureau, 1911 - 70 pages |
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Report on the Molybdenum Ores of Canada, 1911 (Classic Reprint) T. L. Walker No preview available - 2017 |
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Aldfield assayed band biotite bismuth bismuthinite Bureau of Mines Canada Cape Breton county carrying molybdenite cent molybdenite chalcopyrite cobbed concentration Concession containing copper country rock crystalline limestone crystals denite deposits of molybdenite diameter Doucet and Sweezie dyke east economic Elmore Eugene Haanel examined feet feldspar flakes fluorite following result frequently Gabarus gangue Geological Survey gneiss granite graphite Hastings county inches intrusive John McLeish laboratories Lake Kewagama limestone Magnetometric Survey Maurice Syndicate mica miles north mineral rights Mines Branch Mining Division molyb molybdenite bearing molybdenite deposits molybdenite found molybdenite occurs molybdenum molybdite north shore obtained occurrence of molybdenite Ottawa Peat Expert pegmatite peninsula pits PLATE prospecting pyrite pyroxene pyroxene rock pyroxenite pyrrhotite Quebec region Report on-by river Romaine sample shaft Shelburne county specimens of molybdenite stringers Survey of Canada Sweezie claims Texada island thickness tons tungsten vicinity visited wolframite writer
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Page 63 - An investigation of the Coals of Canada with reference to their Economic Qualities: as conducted at McGill University under the authority of the Dominion Government.
Page 61 - Investigation of the different electro-thermic processes for the smelting: of iron ores, and the making of steel, in operation in Europe. Report of Special Commission — by Eugene Haanel, Ph.D., 1904.
Page 9 - What went through the 60-mesh screen was elevated and sent to the tailings pile. It is readily seen that the repeated elevations of the material meant a considerable waste of power. The mill ran only six weeks, and is said to have made about a ton of concentrates, a portion of which seen by the writer was very clean. In the tailings some fine flakes of molybdenite were found, but the amount seemed small. Such a process, if mechanically perfected, might work profitably on deposits where, as in this...
Page 9 - This selective action is materially increased in some cases by the presence of an acid ; and secondly upon the fact that the air or gases dissolved in water are liberated, partially or entirely, upon subjecting the same to a pressure less than that of the surrounding atmosphere. These liberated gases may be augmented by the generation of gases in the pulp or by introduction from an external source.
Page 5 - Concentration of Molybdenite. The preparation of the crude ore for the market is one of the most difficult problems in ore dressing. Up to the present it is doubtful if a satisfactory solution has been arrived at. The mineral is very soft, and usually occurs in a very hard gangue, largely quartz and feldspar. In attempting to crush by stamps or rolls, much of the molybdenite is finely divided, so that a large loss resul'.s by sliming.
Page 15 - From the results of Mr. Johnston's determinations up to date, the following minerals have been found to occur in the granites at New Ross: cassiterite, monazite, one of the columbite minerals, durangite, amblygonite, a lithium mica probably lepidolite, wolframite, scheelite, hubnerite, molybdenite, zinc blende, beryl, apatite, tourmaline, fluorite, pyrolusite, manganite, limonite, hematite, magnetite, siderite, bismuthinite, argentiferous galena, copper, iron and arsenical pyrites, kaolin and fire-clay,...
Page 10 - ... none of these processes has up to the present been employed very satisfactorily for the separation of molybdenite. It would seem as if a reasonable combination of the dry screening process for the removal of the coarser flakes, followed by a treatment of the tailings by the vacuum process, should give results superior to those obtainable from the employment of any one of these methods alone. In New South Wales and Queensland, which produce a large part of the world's molybdenum ores, the molybdenite-bearing...
Page 6 - The plant consisted of a 35-horsepower boiler and engine, a Sturtevant jaw crusher and roll, and four sets of special rolls, each 3 feet in diameter and 10 inches wide. The crusher was but a couple of feet above the floor, from which the material, crushed to about one-fourth inch square, was elevated to the Sturtevant roll, 18 inches in diameter by 4 inches wide, which reduced the ore to about one-eighth inch. It was then elevated to a bin at the top of the building, from which it...
Page 9 - ... of special rolls, each 3 feet in diameter and 10 inches wide. The crusher was but a couple of feet above the floor, from which the material, crushed to about one-fourth inch square, was elevated to the Sturtevant roll, 18 inches in diameter by 4 inches wide, which reduced the ore to about one-eighth inch. It was then elevated to a bin at the top of the building, from which it fell to a series of two special rolls, thence was elevated to a third special roll, and run through a 34-mesh screen....
Page 9 - ... screen was elevated and sent to the tailings pile. It is readily seen that the repeated elevations of the material meant a considerable waste of power. The mill ran only six weeks, and is said to have made about a ton of concentrates, a portion of which seen by the writer was very clean. In the tailings some fine flakes of molybdenite were found, but the amount seemed small. Such a process, if mechanically perfected, might work profitably on deposits where, as in this one, the molybdenite flakes...