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de Gids (60, No. 4)

de Gids (60, No. 4)


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About the Book

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. Excerpt from book: Section 3Chapter III. Copper. William H. Bassett, textit{Technical Superintendent and Metallurgist, The American Brass textit{Company. The metallurgy of copper is a broad subject and in reviewing the progress made during the past year it is necessary to limit this survey to the refining and technology of copper and to progress in the field of copper alloys. Refining of Copper. The marked advances in copper refining during the past year may be summarized as follows: 1. The control of the resistance of the electrolyte in electrolytic refining resulting in marked saving of power in the tank house. A few years ago, 150 grams per liter was the usual sulfuric acid strength of the electrolyte. The present acidity will range from 200 to 220 grams per liter, requiring considerably less consumption of power per unit of copper deposited. 2. The use of pulverized coal or fuel oil superseding the semi- producer fire box for refining furnaces, resulting not only in more economical operation, but also better copper. The features and advantages of a pulverized coal installation at Anaconda have been described by Bardwell and Miller.1 3. The use of the microscope in controlling the work of the refining furnace. This is scientifically a marked advance in the art of copper refining. The rabbling to set copper and the poling to- tough pitch copper are controlled in at least three of the large refineries by determining the oxygen content of the copper by means of the microscope. A method of analysis based on microstructure was described in 1913 by Bardwell,2 whodeveloped a method along the lines suggested by the work of Hofman, Green and Yerxa.3 'Trans. Am. Inst. Mining Met. Eng., Preprint; 1925. 'Trans. Am. Inst. Mining Met. Eng., 46: 742; 1913. 4. The recovery of by-product metals other than silve...


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Product Details
  • ISBN-13: 9781443273152
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 214
  • Spine Width: 11 mm
  • Width: 189 mm
  • ISBN-10: 1443273155
  • Publisher Date: 01 Jan 2013
  • Binding: Paperback
  • Language: Dutch; Flemish
  • Returnable: N
  • Weight: 390 gr


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