| 单词 | magnesite |
| 例句 | They mined copper, gold, zinc, lead and magnesite. In Gold Butte in Nevada, Ancient Rock Art and Rugged Beauty 2017-07-25T04:00:00Z South Koreans were taken to major coal, magnesite, zinc and lead mines mostly in North and South Hamgyeong Provinces, according to the human rights group investigation. North Korea enslaved South Korean prisoners of war in coal mines 2021-02-24T05:00:00Z That reaction would leave magnesium oxide powder, which when spread thin would rapidly react with CO2 from the atmosphere, re-forming magnesite, completing a cycle that could be repeated over and over. Industrial waste can turn planet-warming carbon dioxide into stone 2020-09-03T04:00:00Z Specifically, the researchers turned it into carbonate minerals such as calcite and magnesite. Turning air into stone 2016-06-08T04:00:00Z Kim mentioned the need to develop the metal and railway industries, and cited his ambitions to export raw materials like magnesite and graphite around the world. North Korean leader unveils 5-year plan for economy, but no radical reforms 2016-05-08T04:00:00Z North Korea, unbeknownst to many, possesses vast tracts of underexploited mineral resources: magnesite, coal, graphite, iron, tungsten, zinc, and more. The Puzzle Over North Korean Gold 2014-08-04T04:00:00Z Verde-antique, verd-an-tēk′, n. a beautiful stone of a dark-green colour with patches of white, and sometimes black and red—a mixture of serpentine with limestone dolomite or magnesite, much prized by the ancient Romans. Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) 2012-01-30T03:00:19.113Z In Chemical Geology as well as a recent patent, Kelemen and his colleagues propose using a mineral called magnesite that, when heated, gives off pure CO2, which could be captured in tanks and pumped underground. Industrial waste can turn planet-warming carbon dioxide into stone 2020-09-03T04:00:00Z There are also mills for grinding the magnesite found in the neighbourhood. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 1 "Franciscans" to "French Language" 2011-10-22T02:00:29.487Z It is cheaper but less satisfactory than magnesite, and is not likely to be used on any large scale. The Economic Aspect of Geology From Austria Hitler got more men for his army, large deposits of magnesite, timber forests and enormous water-power resources for electricity. Secret Armies The New Technique of Nazi Warfare It occurs in a number of localities as magnesite, which is usually amorphous, but sometimes forms pure crystals resembling calcite. An Elementary Study of Chemistry The magnesite readily gives up carbonic acid, which fills the tube and sweeps the mercury vapour before it. A Text-book of Assaying: For the Use of Those Connected with Mines. For every ton of steel produced five pounds of magnesite is needed. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries In making magnesite bricks, it is calcined or "dead-burned" to drive out the carbon dioxide. The Economic Aspect of Geology Austria also agrees to give an option for five years as to timber, iron, and magnesite in amounts as nearly equal to the pre-war importations as Austria's resources make possible. World's War Events Volume 3 Beginning with the departure of the first American destroyers for service abroad in April, 1917, and closing with the treaties of peace in 1919. As magnesite, but the residual mass has a dark color from iron and manganese. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations This tendency is overcome by avoiding draughts and regulating the heat; or by placing a lump of magnesite in the flask, which acts by evolving carbonic acid and so producing a steady outward pressure. A Text-book of Assaying: For the Use of Those Connected with Mines. In Captain King's collection are also specimens found on the beach at Port Macquarie, and in the bed of the Hastings River, of common serpentine, and of botryoidal magnesite, from veins in serpentine. Narrative of a Survey of the Intertropical and Western Coasts of Australia Performed between the years 1818 and 1822 — Volume 2 Since the war, magnesite shipped from Canada and overseas has again replaced the American product in the eastern market to some extent. The Economic Aspect of Geology Output of the extractive industries includes coal, iron ore, magnesite, graphite, copper, zinc, lead, and precious metals. The 1993 CIA World Factbook Output of the extractive industries includes coal, iron ore, magnesite, graphite, copper, zinc, lead, and precious metals. The 1992 CIA World Factbook All carbonates are soluble with effervescence in dilute acids; some, such as chalybite and magnesite, require the aid of heat. A Text-book of Assaying: For the Use of Those Connected with Mines. Output of the extractive industries includes coal, iron ore, magnesite, graphite, copper, zinc, lead, and precious metals. The 1994 CIA World Factbook The Canadian magnesite is of lower grade than the domestic and European magnesite and is consequently less desirable. The Economic Aspect of Geology It differs, perhaps, as I have before explained, from magnesite in containing lime besides magnesia, and from calc spar by the vice versa. Scientific American Supplement, No. 363, December 16, 1882 Concealed behind the heraldic emblems are powerful magnesite arc lamps. The Jewel City A process of treatment was perfected by which the Washington magnesite was made as desirable for lining furnaces as the Austrian material. The Economic Aspect of Geology The most important use of magnesite is as a refractory material for lining furnaces and converters. The Economic Aspect of Geology Austrian magnesite, however, will be likely to dominate the market in the future if delivered at anything like pre-war prices. The Economic Aspect of Geology Its characteristics are: first, its burning to quicklime before the blowpipe, distinguishing it from pure magnesite; second, its slow effervescence in acids. Scientific American Supplement, No. 363, December 16, 1882 Austria-Hungary and Greece are the large European producers of magnesite and Scotland supplies a little. The Economic Aspect of Geology Before the war only about 5 per cent of the United States requirements of magnesite were met by domestic production. The Economic Aspect of Geology Under the high prices which prevailed during the war, dolomite was to some extent substituted for magnesite. The Economic Aspect of Geology The commoner type of magnesite deposits is represented by those of Greece, California, Venezuela, and many other countries. The Economic Aspect of Geology Aragonite.—This mineral, identical in composition with calc spar, but whose crystalline form is entirely different, occurs in this locality in veins hardly recognizable from the magnesite or dolomite, and running into dolomite. Scientific American Supplement, No. 363, December 16, 1882 Dolomite, which may be thought of as a magnesite rock high in lime, occurs in large quantities close to many points of consumption. The Economic Aspect of Geology While the United States has undoubtedly sufficient reserves of magnesite to supply the domestic demands for many years, the mines are far from the centers of consumption and it is expensive to transport the material. The Economic Aspect of Geology This situation has led to agitation for a protective tariff on magnesite. The Economic Aspect of Geology Under these circumstances the magnesite is characteristically fine-grained or massive, and occurs in veins, lenses, and irregular bodies in cavities and fractured zones. The Economic Aspect of Geology The veins of minerals are about a half an inch to—in the case of druses of magnesite, which penetrate the rock in all proportions and directions—even six inches in thickness. Scientific American Supplement, No. 363, December 16, 1882 The principal magnesite deposits are of two types, of different modes of origin and of somewhat different physical characteristics. The Economic Aspect of Geology The characteristics of magnesite I have detailed under that head under Pavilion Hill, Staten Island; but it may be well to repeat them briefly here. Scientific American Supplement, No. 363, December 16, 1882 |
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