The Transactions of the Canadian Mining Institute, Volume 19Canadian Mining Institute., 1916 - Mineral industries Vols. for 1918-20 include the Transactions of the Mining Society of Nova Scotia. |
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24 hours agitation Anaconda apatite Assay average Banff barrels beds bubbles Buckingham map-area Buckingham series calcite Callow Canada Canadian carbon Carboniferous cent chalcopyrite coal dust coarse concentrate copper cost creosote Crowsnest Crowsnest Pass crusher deposits dewatering diameter district efficiency Elmore feet feldspar film flotation friction froth gangue Geological grade granite graphite Grenville haulage heat Huntington mill inch increase jigs labour lignite lime limestone load machine magnesite material McGill University measured mesh metallic method miles mill Minerals Separation mines molybdenite MoS2 obtained occur Oil Springs operation particles patent pegmatite Petrolia phlogopite phosphate phosphate rock plant Plate production pulp pumped pyroxene pyroxenite quantity quartz quartzite Rittinger rolls Round-Table Feed sand scapolite screen shaft shale slime sludge acid Stadler steel Suan sulphides surface tension Table tailing tank tests timber tion tonnage tons Total Trommel United writer
Popular passages
Page 42 - ... this acidity being to prevent gangue from being coated with oily substance, or, in other words, to render the selective action of the oil more marked ; but it is to be understood that the object of using acid in the pulp according to this Invention Is not to bring about the generation of gas for the purpose of flotation thereby, and the proportion of acid used Is insufficient to cause chemical action on the metalliferous minerals present.
Page 96 - The flotation division consists of four Minerals Separation machines,, each having 15 agitators 3 ft. square, and 14 spitzkasten or floating compartments. The agitators for the Minerals Separation machines are of gun metal and are driven by bevel gears from a line shaft, the direction of rotation of the agitators alternating. The machines are made of California red wood; the agitator boxes are further lined with hard maple extending about 18 in. from the bottom of the box. Each machine has an individual...
Page 76 - ... added in MS Machine. Acid Circuit. — The tailing produced during this period (No. 25) averaged 0.07 per cent. Cu. The concentrate was too siliceous, averaging 40.1 per cent, insoluble. The only reagents used were sulphuric acid and sludge acid kerosene. It should be noted that the product treated during this period contained only 3.1 per cent, on 80 mesh (0.20mm.). (c) High Tonnage (187 Tons). Same Conditions as under (b), except that Flotation Machine was Divided into Two Parts, Making a Primary...
Page 95 - Dorr classifiers — one classifier to each mill — the overflow going to the flotation division and the classifier sand being returned to the mill. At the time it was first decided to remodel the concentrator, it was not definitely known whether pebbles or steel balls would be used for grinding. To provide for this uncertainty a compromise was effected. The mills were made 10 by 4 ft. and built sufficiently strong for steel balls in case balls were used. Each mill was equipped with a 225-hp. motor...
Page 74 - It is thought that about 70°F. will be found to be the most economical temperature at which to keep the pulp. 7. Acid seems to be absolutely essential to the successful treatment by flotation of our slime. 8. The addition of air in the last spitzkasten is of no advantage. 9. Any considerable increase in speed of the agitators above a peripheral speed of about 1,300 ft.
Page 46 - The gases attach themselves to the greased mineral particles, and being largely increased in volume as a result of the partial vacuum applied, cause the greased particles with their attendant bubbles of air or gas to float to the surface of the liquid.
Page 322 - Wheat was produced quite successfully in central New York for something like forty years. During the latter part of that period the yields began to decline and at the end of another twenty years they were so low that exclusive wheat growing became unprofitable. Ohio, Indiana, Illinois, and Iowa have each in turn repeated the history of New York. The soils of these states were productive in the beginning, and it required forty, fifty, or sixty years for the single crop system to materially reduce...
Page 88 - Periods 14D and 15A). (d) Tar Creosote from Butte Gas Works. — A test was made using a barrel of tar creosote from the Butte Gas Works, which gave fairly good results. The test was of too short duration to be conclusive, but it is thought that the tar creosote would give satisfactory results (see Period 15B). In testing the Callow machines a mixture of oil containing tar creosote from the Barrett Manufacturing Co. was used with good results (see Periods 40 and 41). In the laboratory tests we have...
Page 42 - ... mineral particles in the pulp. When agitation is stopped, a large proportion of the mineral present rises to the surface in the form of a froth or scum which has derived its power of flotation mainly from the inclusion of air-bubbles introduced into the mass by the agitation, such bubbles or air-films adhering only to the mineral particles which are coated with oleic acid.
Page 79 - The concentrate produced, 34.1 per cent, insoluble, is of a good grade, but the tailing is high, 0.20 per cent. Cu. Theoretically, the tailing should have assayed about 0.15 per cent. Cu, assuming a 0.10 per cent. Cu tailing from the sand tailing and 0.30 per cent. Cu tailing from the slime. Although this test was not conclusive, it was decided, from observation, that it is better to treat the slime and the sand tailing separately. Of course, the slime which is made in the grinding of the sand tailing...