Congressional Edition Volume 3784

Congressional Edition Volume 3784

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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. 1898 edition. Excerpt: ...green poles into the molten bath of copper. After proper "settling" in this way the copper is ladled into flat molds with T heads, and the slabs when cooled are termed anodes, containing 98 per cent or more of copper, ready to be suspended in electrolytic vats to be refined. Doing away with casting this anode by remelting converter bars has been tried, but not with signal success so far, although a.plant for this purpose was being tested at the Anaconda Works during a visit by the writer to that establishment during the past year, and no doubt practical results may be looked forward to. Refining.--In Montana the practice in electrolytic refining is the arrangement of the vats in a series of rows, and electric traveling cranes handle the sets of anodes and cathodes. The cathodes are thin strips of electrolytic copper, which alternate with the anode castings. The electrolytic is a copper sulphate solution, which is held at a standard of strength and kept moving through the series of vats. Upon an electric current being introduced the copper is deposited from the anodes on to the cathodes, and the silver, gold, and impurities contained in the anode castings drop to the bottom of the vats in the form of a slime or mud. The copper deposited on the cathode strips is melted and molded into bars, when it is ready for commercial use. Refining of slimes.--At the Anaconda works the slimes of gold and silver are reduced to Dore bullion at the works. The Boston and Montana slimes are sent East. LEAD SMELTING. The establishments in Montana operating with lead as a base for gathering precious metal values are as follows: The United Smelting and Refining Company's works at East Helena and at Great Falls, and the Hecla Consolidated Mining...show more

Product details

  • Paperback | 126 pages
  • 189 x 246 x 7mm | 240g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236570863
  • 9781236570864