Element of Mineralogy, Crystallography and Blowpipe Analysis from a Practical Standpoint

Element of Mineralogy, Crystallography and Blowpipe Analysis from a Practical Standpoint

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ... the present five cent piece being 25 per cent, nickel, 75 per cent, copper, and in other coins the percentage of copper being still greater. The most extensive application of nickel at present is in the manufacture of nickel steel for armor plates and other purposes. The uses of nickel steel are continually increasing as the metal has some excellent properties possessed by no other alloy. To a limited extent nickel is used in a nickel-copper alloy for casing rifle bullets. A sulphate of nickel and ammonium is also manufactured in large amounts for use in nickel plating. The nickel of commerce is nearly all obtained either from the garnierite of New Caledonia or from the deposit of nickel-bearing sulphides at Sudbury, Ontario. The garnierite is smelted in a low blast furnace, with coke and gypsum, and the matte of nickel, iron and sulphur thus produced is alternately roasted and fused with sand, in a reverberatory furnace, until nearly all the iron has been removed. The nickel sulphide, by oxidation, is converted into oxide. Nickel oxide is obtained from the pyrrhotite and chalcopyrite of Sudbury, Canada. The ore is first roasted, which removes much of the sulphur, and is then smelted, together with nickelbearing slags of previous operations. A nickel matte carrying much copper and some iron is produced through which air is blown in a silica lined Bessemer converter and most of the iron is carried into the slag. A matte, rich in nickel and copper, results. This may be directly roasted and reduced by carbon to produce nickel-copper alloys for the manufacture of German silver. In order to separate the nickel the concentrated matte is fused with sodium sulphate and coke, after which the melted sulphides are allowed to settle. Under these conditions...show more

Product details

  • Paperback | 120 pages
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236581075
  • 9781236581075