Notes on Assaying and Assay Schemes; By Pierre de Peyster Ricketts

Notes on Assaying and Assay Schemes; By Pierre de Peyster Ricketts

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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. 1884 edition. Excerpt: ...it presents a white crystalline fracture. Titanium--The button is smooth on the outside, has a deep gray fracture, dull and crystalline, and adheres strongly to the slag. The button is sometimes covered with the nitro-cyanide of titanium with its characteristic copper color. Chromium--The button is smooth, well fused, with a brilliant crystalline fracture, and tin-white color; at other times it is white and only half fused, or it may even form a spongy mass of a clear gray color, according to the quantity of. chromium contained in the iron. Remarks.--A number of type ores gave on assay: Ore. Iron by Analysis. By Fire Assay. Magnetite 68.35 per cent. 69.6 71.2 71.3 per cent. Hematite 44.50" 44.6 46.0 48.6" Limonite 44.20" 44.3 44.6 45.2" Assays of magnetite containing titanic acid gave 72.5 and 73. per cent. Another magnetite 64.0 64.5 per cent. Hematite 39.0 38.5" Limonite 34.0 34.0" Other slags besides the one given might be used, as Bodemann's, which is silica 56, lime 30, alumina 14 per cent., an addition of borax and fluor spar makes this slag more fluid. NICKEL AND COBALT. Symbols--Ni. and Co. Sources.--These two metals are generally found associated, and their treatment will be described under the same head. The principal ores of nickel are niccolite, copper nickel (MAs), pure=43 per cent. nickel. Millerite, sulphide (MS), pure=64.4 per cent. nickel. The principal ores of cobalt are smaltite, tin-white cobalt (Co, Fe, Ni)As?, pure=9 to 33 per cent. cobalt. Cobaltite (CoS2 + CoAs2), pure=35.5 per cent. cobalt. Both nickel and cobalt occur in many other minerals, chiefly in combination with sulphur or arsenic, and associated with iron, copper, lead, etc. We have also an artificial product called "spiess, ..".show more

Product details

  • Paperback | 42 pages
  • 189 x 246 x 2mm | 95g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236537858
  • 9781236537850