The Mineral Industry, Band 5Scientific Publishing Company, 1897 |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
alloy alumina aluminum ammonia amount antimony assay average benzol blast furnace borax Cañon City carbide carbon carried cement Cent charcoal charge chemical chloride clay close coal coke Colo color Company consumption containing copper corundum cost crystals deposits diameter district electrolytic emery Engineering and Mining export gases gold hearth heat important impurities increased ingots kaolin kgms latter lead lime limestone long tons manufacture material matte metal meters method metric tons mill MINERAL INDUSTRY month nickel obtained operation output ovens oxide Patent picul pig iron plant precipitated present production pyrites quantity quartz refining reverberatory reverberatory furnaces roasting rock salt sample sand shaft shipments short tons silica silicon silver slag smelting sodium solution spelter statistics steel sulphate sulphide sulphuric acid temperature tion United Utah vanadium washed zinc
Beliebte Passagen
Seite 267 - Into a dilute solution of chloride of gold, contained in a glass jar, put a long narrow slip of charcoal, and expose the whole to the direct light of the sun. The gold will be revived, and will appear on the charcoal in a metallic state, exhibiting a very beautiful appearance. The same change ensues without light, if the solution be exposed to a temperature of 212°.
Seite 457 - ... sixty-gallon packs of charcoal, may be melted in a tide or twelve hours' time. Those bellows are not only useful for igniting the charcoal, but they throw a steady and powerful air into the castle, which, at the same time that it smelts the Tin, forces it out also through a hole at the bottom of the castle, about four inches high and one...
Seite 306 - The production of these 75,0G0 tons of basic iron is, therefore, one of the noteworthy occurrences in the development, of the iron and steel industry of the United States. Perhaps the commonest criticism of Alabama iron was that it carried too much silicon rather than too little. With the silvery irons showing over 5 per cent, of this element, and the foundry grades, at times, ranging from 2.50 per cent. to 3.25 per cent., the tendency was toward high-grade softeners, with sulphur from 0.030 per...
Seite 555 - The following recapitulation of the essential provisions of this legislation gives all of the material points covered by any of the mining laws. Some of the states, notably Pennsylvania, cover practically all of the points here enumerated in their laws, while others merely include the most important. The mining code of an American state in its most developed form therefore provides: 1) that every owner, operator or superintendent of a mine employing over a certain number of persons, usually ten,...
Seite 556 - ... conditions are given which are not included in this list. Thus Pennsylvania requires all stables in mines to be built in the solid strata without the use of wood; Pennsylvania and Montana, that stretchers be provided for removing injured workmen; and Kansas, that all blasts be fired by special firers. Rules, however, can never replace the personal element. The best of rules are of but little avail unless competent men can be secured to supervise their application. The most significant and important...
Seite 612 - Hoff has made it highly probable- that the osmotic pressure of substances existing in a solid solution is analogous to that in liquid solutions, and obeys the same laws : and it is probable that the behaviour of a solid mixture, like that of a liquid mixture, would be greatly simplified if the solid solution were very dilute. The author proceeds to describe his own experiments on the diffusion of solid metals. They are of the same nature as in the. case...
Seite 71 - He bent a wire of pure soft iron, so as to form an angle in the middle, in which part he divided it longitudinally, by a fine saw. In the opening so formed, he placed diamond powder, securing it in its situation by two finer wires, laid above and below it, and kept from shifting, by another small wire bound firmly and closely round them. All the wires were of pure soft iron; and the part containing the diamond powder was enveloped by thin leaves of talc. Thus arranged, the apparatus was placed in...
Seite 457 - The furnace itself for blowing the Tin is called the Castle on account of its strength, being of massive stones cramped together with Iron to endure the united force of fire and air. This fire is made with charcoal excited by two large bellows, which are worked by a waterwheel, the same as at the Iron forges. They are about eight feet long and two and a half wide at the broadest part. The fireplace, or...
Seite 608 - Diffusion of Solid Metals. . The second part of the paper is devoted to the consideration of the diffusion of solid metals. Much of the evidence is historical, for there has long been a prevalent belief that diffusion can take place in solids, and the practice in conducting important industrial operations supports this view. In this connexion the author cites two truly venerable
Seite 457 - ... pounds of Metal, called Slabs, Blocks, or Pieces of Tin, in which size and form it is sold in every market in Europe...