| 单词 | calcium carbide |
| 例句 | Currently, the same lamps are used by some cavers, and calcium carbide is used to produce acetylene for carbide cannons. Chemistry 2019-02-14T00:00:00Z The statement says the company, which manufactures calcium carbide, is cooperating with authorities to determine how the accident happened. Industrial worker fatally injured in workplace accident 2018-02-15T05:00:00Z There were also unspecified amounts of calcium carbide, a highly flammable chemical that produces acetylene, which is used in welding; and sodium hydrosulfide, an extremely toxic compound used in mining. Behind Tianjin Tragedy, a Company That Flouted Regulations and Reaped Profits 2015-08-30T04:00:00Z There are concerns that forecasted rain will react with calcium carbide to create an explosive and toxic gas in the air. Tianjin blasts: sodium cyanide on site may have been 70 times allowed amount 2015-08-15T04:00:00Z A variety of toxic substances were believed to be stored at the site including potassium nitrate, ammonium nitrate, calcium carbide and sodium cyanide. New fires at site of massive Chinese blasts; officials order evacuations 2015-08-15T04:00:00Z Local police said the warehouse was being used to store ammonium nitrate, potassium nitrate and calcium carbide at the time of the blasts. Searching Questions Asked in Tianjin Aftermath 2015-08-14T04:00:00Z It was storing mainly ammonium nitrate, potassium nitrate and calcium carbide at the time of the blasts, according to the police. China investigates cause of blasts at Tianjin port, firms assess damage 2015-08-13T04:00:00Z The chemicals stored there include sodium cyanide, toluene diisocyanate and calcium carbide, all of which can be harmful to humans, according to the Tianjin Fire Department. 'Mama, save me, I can't bear it': A firefighter's cry in China's inferno 2015-08-13T04:00:00Z According to the Tianjin Tanggu Environmental Monitoring Station, the company stored a collection of toxic industrial chemicals, including sodium cyanide, toluene diisocyanate and calcium carbide. Tianjin Explosions Leave Warehouse District a Smoky Ruin 2015-08-13T04:00:00Z By 12 or 13, I was blowing up things with firecrackers and calcium carbide. These Were a Few of Their Favorite Things 2012-12-24T23:34:41Z It is a colorless gas, with a peculiar, unpleasant odor, and is produced for use as an illuminating gas in a number of ways, but chiefly by the action of water on calcium carbide. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z His own trade is in rosy red apples, laced with calcium carbide. Insight: Soapy milk, toxic apples: India's sour food safety 2012-02-13T02:59:22Z So a lump of calcium carbide, with which many readers are familiar, has vast stores of heat locked up within it. Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science 2011-11-19T03:00:24.517Z Great attention has recently been paid to the production of acetylene gas, produced by the reaction between calcium carbide and water. Inventions in the Century 2011-07-20T02:00:14.643Z The plant uses calcium carbide to produce Acetylene gas among other products, according to a company website. Explosion at chemical plant kills two workers 2011-03-22T18:30:50Z The arc furnaces now widely used in the manufacture of calcium carbide on a large scale are chiefly developments of the Siemens furnace. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z During the interview, the official also had to check with someone on the phone whether calcium carbide was legal or not. Insight: Soapy milk, toxic apples: India's sour food safety 2012-02-13T02:59:22Z A great deal of heat is developed on adding water to calcium carbide, so that care has to be taken in generating acetylene. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide As the temperature cooled, and the water vapour became condensed, it entered into chemical combination with the various rocks, producing organic compounds like acetylene, which results from the action of water on calcium carbide. The Mechanism of Life The fatal explosion, involving calcium carbide, occurred Monday evening at the Carbide Industries plant in Louisville's Rubbertown district, a heavily industrial area with 10 other chemical plants near the Ohio River, authorities said. Explosion at chemical plant kills two workers 2011-03-22T18:30:50Z The production of aluminium in Switzerland and Scotland, carborundum and calcium carbide in the United States, and soda by the Castner-Kellner process, began to be conducted on an immense scale. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Instead, they buy the fruits and later ripen them with calcium carbide, a substance colloquially known as "masala," or "spice." Insight: Soapy milk, toxic apples: India's sour food safety 2012-02-13T02:59:22Z It is formed in the incomplete combustion of many hydrocarbons and also of coal-gas, and may be produced in a variety of ways, but is now made almost entirely from calcium carbide. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide The introduction of the electric furnace into practical chemistry was followed by the preparation of many metallic carbides previously unknown, some of which, especially calcium carbide, are now of great commercial importance. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" There are cement factories in the town, and calcium carbide is an important article of export. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" There is a third class of operations, exemplified by the manufacture of calcium carbide, in which electricity is employed solely as a heating agent; these are termed electrothermal, as distinguished from electrolytic. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z Petroleum oil is estimated to supply power at just one-third the price of acetylene gas made with calcium carbide at a price of £20 per ton. Twentieth Century Inventions A Forecast The world learned one morning of a new gas called acetylene, clear, brilliant, cheap, and simply made from calcium carbide. Frenzied Finance Vol. 1: The Crime of Amalgamated The commercial aspect of calcium carbide is treated in the article Acetylene. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" Write the equation for the reaction between calcium carbide and water. An Elementary Study of Chemistry Acetylene, generated from calcium carbide inside the buoy, is also used. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" This calculation was drawn up before the occurrence of the material rise in the price of "petrol" in the last year of the nineteenth century; while, concurrently, the price of calcium carbide was falling. Twentieth Century Inventions A Forecast Acetylene gas, as generally used, is generated by bringing water in contact with the calcium carbide. The Great Round World and What Is Going On In It, Vol. 2, No. 5, February 3, 1898 A Weekly Magazine for Boys and Girls He would use the electrical energy on the Dortmund and Emshaven Canal, and for the manufacture of calcium carbide. Scientific American Supplement, No. 1178, June 25, 1898 The inner tube contains fragments of calcium carbide, while the outer one is filled with water. An Elementary Study of Chemistry A faint smell of acetylene may be perceived during the oxidation in moist air; this is probably due to traces of calcium carbide. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary" But it seems exceedingly probable that a compromise will ultimately be effected between the methods adopted for making water-gas and calcium carbide respectively, the electric current being employed to keep the carbons incandescent. Twentieth Century Inventions A Forecast The simplicity of the manufacture of acetylene from calcium carbide and water gives to this gas a great advantage in some cases. Artificial Light Its Influence upon Civilization He also made the carbides of the various metals, including the now common calcium carbide. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries On the supposition that calcium carbide costs 12 cents a kilogram, what would be the cost of an amount sufficient to generate 100 l. of acetylene measured at 20° and 740 mm.? An Elementary Study of Chemistry In 1892 it was discovered that lime and coal fused together in the intense heat of the electric furnace formed a crystalline, metallic-looking substance called calcium carbide. General Science The two principal processes utilized in making calcium carbide by electrical power are the ingot process and the tapping process. The Project Gutenberg Encyclopedia Volume 1 of 28 If there are impurities in the calcium carbide, it is sometimes necessary to purify the gas before it may be safely used for interior lighting. Artificial Light Its Influence upon Civilization This requires electrical power since it starts with a product of the electrical furnace, calcium carbide, familiar to us all as a source of acetylene gas. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Whether the mixture will prove cheaper under particular conditions must depend on the relative prices of gas-oil and calcium carbide at the works where the gas is made and compressed. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power When the hard, gray crystals of calcium carbide are put in water, they give off acetylene, a colorless gas which burns with a brilliant white flame. General Science He also made the corresponding sodium compound and showed that it evolved the same gas, whilst in 1862 F. Wohler first made calcium carbide, and found that water decomposed it into lime and acetylene. The Project Gutenberg Encyclopedia Volume 1 of 28 The chief source of calcium carbide in this country is the electric furnace. Artificial Light Its Influence upon Civilization For calcium carbide is convenient and portable and acetylene, when it is once started, as by an electric shock, decomposes spontaneously by its own internal heat into hydrogen and carbon. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries This wastage is not due to any decomposition of the acetylene in contact with water, but depends on the various solubilities of the different gases which compose the product obtained from commercial calcium carbide. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power When nitrogen gas is in contact with heated calcium carbide, a reaction takes place which results in the formation of calcium nitride, a compound suitable for enriching the soil. General Science In the manufacture of calcium carbide in the electric furnace, lime and anthracite of the highest possible degree of purity are employed. The Project Gutenberg Encyclopedia Volume 1 of 28 The cheapness of calcium carbide is due to the development of cheap electric power. Artificial Light Its Influence upon Civilization The calcium carbide that he manufactures from inorganic material serves as the raw material for producing all sorts of organic compounds. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries The fact that ordinary calcium carbide is attacked so quickly by water is really a defect of the substance; for it is to this extreme rapidity of reaction that the troubles of overheating are due. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The Union Carbide Company of Chicago and New York, operating under patents, manufactures and distributes the supply of calcium carbide for the entire United States. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon Some of the more important consumers of the electric power, named in the order of consumption, are for the manufacture of the following products: calcium carbide, aluminium, caustic soda and bleaching salt, carborundum, and graphite. Beacon Lights of History, Volume 14 The New Era; A Supplementary Volume, by Recent Writers, as Set Forth in the Preface and Table of Contents It is said that calcium carbide was discovered as a by-product of the electric furnace by accidentally throwing water upon the waste materials of a furnace process. Artificial Light Its Influence upon Civilization With this crude apparatus and with no greater electromotive force than could be attained from a voltaic pile, he converted charcoal into graphite, volatilized phosphorus from its compounds, isolated metallic calcium and synthesized calcium carbide. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Analogous reactions take place when either oxide of carbon is led over calcium carbide heated to a temperature of 200° or 250° C., the second product in this case being calcium oxide. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Overheating.—A large amount of heat is liberated when acetylene gas is formed from the union of calcium carbide and water. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon Into the cans were put certain chemicals that generated a gas which, when lighted, gave a brilliant glow, almost like calcium carbide. Tom Swift in the City of Gold, or, Marvelous Adventures Underground The discovery of a commercial scale of manufacture of calcium carbide has been a boon to isolated lighting. Artificial Light Its Influence upon Civilization These heated together in the electric furnace form calcium carbide and this, as every automobilist knows, gives acetylene by contact with water. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries Between calcium carbide and water vapour a double decomposition occurs chemically identical with that between carbide and liquid water; but the physical effect of the reaction and its practical bearings are considerably modified. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Purification of Acetylene.—Impurities in this gas are caused by impurities in the calcium carbide from which it is made or by improper methods and lack of care in generation. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon The process involves merely a transformation at a high temperature, a portion of the carbon in the form of coke, uniting with pulverized lime to give the calcium carbide or CaC2. The Story of Electricity In one type, a mixture-tank containing calcium carbide and water is of sufficient capacity for three hours of signaling. Artificial Light Its Influence upon Civilization Another valuable product of the electric furnace was the calcium carbide first produced in 1892 by Thomas L. Wilson of Spray, North Carolina. The Age of Invention : a chronicle of mechanical conquest As the material operated upon contained only 91.3 per cent. of true calcium carbide, he estimates the heat corresponding with the decomposition of 1 gramme of pure carbide to be 0.4446 large calorie. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The surest way to avoid impure gas is to use high-grade calcium carbide in the generator and the carbide of American manufacture is now so pure that it never causes trouble. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon Thus when calcium carbide is heated and brought into contact with nitrogen one atom of carbon is given up and two atoms of nitrogen take its place, resulting in the production of cyanamide. The Story of Electricity Another disadvantage is the possibility of calcium carbide accidentally spilt coming in contact with water and thereby causing the generation of acetylene gas. Artificial Light Its Influence upon Civilization This calcium carbide is the basis of acetylene gas, a powerful illuminant, and it is widely used in metallurgy, for welding and other purposes. The Age of Invention : a chronicle of mechanical conquest Dilute alcohol does not attack calcium carbide so energetically as pure water, because it stands midway between pure water and pure alcohol, which is inert. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power With the development of the modern electric furnace the possibility of calcium carbide as a commercial product became known. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon There's a lot of calcium carbide in that red shed—that's why it's red—to warn the men of danger. Tom Swift and His Aerial Warship, or, the Naval Terror of the Seas Acetylene, which is so simply made by means of calcium carbide and water, has been a great factor in lighting for navigation. Artificial Light Its Influence upon Civilization The use of "cartridges" of calcium carbide has already been briefly referred to in Chapters II. and III. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power On the other hand, unless made up into balls or cartridges of some symmetrical form, calcium carbide exists in angular masses of highly irregular shape and size. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The solid material proved to be calcium carbide and the gas acetylene. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon Still, at the prices for coal, paraffin oil, and calcium carbide which exist in Great Britain, acetylene is not an economical means of providing artificial heat. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power There is, nevertheless, one modification of calcium carbide which, in a small but important sphere, finds a useful rôle. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Also that only calcium carbide, which on admixture with water yields acetylene containing less than 1 per cent. of its volume of sulphuretted hydrogen and phosphoretted hydrogen taken together, may be put on the market. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power After-generation is possible between calcium carbide and mechanically damp slaked lime, between carbide and damp gas, or between carbide and calcium hydroxide, as opportunity shall serve. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power When water and calcium carbide are brought together an action takes place which results in the formation of acetylene gas and slaked lime. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon In comparison also with oils and candles, calcium carbide is capable of yielding, through the acetylene obtainable from it, more light per unit of space occupied by it. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Likewise where storage accommodation is limited, as in vehicles or in ships or lighthouses, calcium carbide may be preferable to oil or other illuminants as a source of light. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power In all probability calcium carbide is odourless, but as it begins to evolve traces of gas immediately atmospheric moisture reaches it, a lump of carbide has always the unpleasant smell of crude acetylene. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Liquid is thus ejected, and may be caused to act upon calcium carbide in some adjacent vessel. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Yet these two substances are forced into combination in the manufacture of calcium carbide. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon This view would be correct if calcium carbide were prepared in a state of chemical purity, for it also is a white body. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Collecting the results into the form of a balance-sheet, the effect of decomposing calcium carbide with water is this: Heat liberated. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Acetylene is readily and quickly produced from a raw material—calcium carbide—which, relatively to the yield of light of the gaseous product, is less bulky than the raw materials of other gases. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power In the first place, calcium carbide itself is a very bad conductor of heat. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Acetylene generators used for producing the gas from the action of water on calcium carbide are divided into three principal classes according to the pressure under which they operate. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon This higher light-yielding capacity of calcium carbide, ready to be developed through acetylene, gives the latter gas a great advantage over all other illuminants in respect of compactness for transport or storage. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power On the contrary, Gin's figure expresses the idea that calcium carbide is exothermic, liberating 3.9 calories when it is produced, and absorbing them when it is decomposed. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Crude acetylene also contains sulphur and ammonia, that coming from good quality calcium carbide at the present day including about 31 grains of the former and 25 grains of the latter per 100 cubic feet. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power When suitable precautions are not taken to remove the heat liberated in an acetylene apparatus, the temperature of the calcium carbide occasionally rises to a remarkable degree. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The ammonia arises from the action of the water upon magnesium, aluminium, or possibly calcium nitride in the calcium carbide, which are bodies also produced in the electric furnace or as the carbide is cooling. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power |
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