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Copper Refining

Copper Refining


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...slime has been somewhat oxidized and leached with dilute sulphuric acid to remove the excess copper; they show noteworthy amounts of selenium present. The high lead content of E results from anodes carrying 0.2 per cent lead. There is room for division of opinion as to the exact compounds present in anode slimes. The silver, gold, and a large part of the copper in slimes from well-refined anodes are doubtless in metallic or alloy form. Selenium and tellurium may be present in elemental form or as selenides, etc. Lead is probably as sulphate and much of the nickel, iron, cobalt, arsenic, antimony and bismuth in some oxidized form, but antimoniates and analogous compounds as well as simple oxides may easily be present. In general the slime is in an oxidized condition since the prior processes in the converter, the anode furnace and during electrolysis are all strongly oxidizing. The less noble metals are all therefore more or less oxidized in the slime when drawn from the electrolytic tanks. There is always a high percentage of copper present. In slimes from converter anodes this is due in part to undecomposed matte, but even in slimes from the purest anodes there is a considerable amount of very finely divided metallic copper to be found after all cathode needles, etc., have been carefully screened out. This probably comes from either mechanical disintegration of the anode under electrolysis or from chemical oxidation of cuprous salts formed at the anode. Any one interested in the various possible explanations of this action would do well to consult an article by Dr. Emil Wohlwill on anode disintegration in the 1903 volume of Zeitschrift fur Electrochemie. Requirements for a Slimes Process.--Perhaps the foremost requirement for a...


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Product Details
  • ISBN-13: 9781152005396
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 56
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1152005391
  • Publisher Date: 01 Apr 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 118 gr


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