More Recent Cyanide Practice
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More Recent Cyanide Practice

More Recent Cyanide Practice


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About the Book

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. 1910 Excerpt: ...eight days. The concentrate, constituting 8% of the ore at the Grand Junction mine, before being re-ground will all pass a 200mesh sieve, and the aim of the re-grinding, which is done in a tubemill, is to bring it to such a fineness that it will pass a silk cloth corresponding to what would be a 400-mesh sieve. This degree of grinding can be brought about if collected concentrate be ground in connection with about 25% of 10-mesh sand, which latter is, by a special separating device, taken from the battery launder. The re-ground concentrate is then agitated in tanks 7% by 37 ft., holding 40 tons each, for a period of 12 days in 0.4% KCy solution. The value of the concentrate will average 11 per ton before treatment, and the residue comes out at 17 shillings per ton, equivalent to an extraction of 92.3%. This is the average extraction at the Grand Junction mine for the past nine months, where 300 tons of concentrate per month, obtained from 4000 tons of ore, is treated. In an effort to produce an efficient continuous filtration device for use in cyaniding slime, T designed a vacuum-filter, which contains features that promise high efficiency. The machine may have a stationary filter-bed or a revolving filter-bed. In the first form, the filter-bed is an annular chamber, the top of which constitutes the filtering surface. The filter used is a form of sand-filter which CONTINUOUS VACUUM-FILTER MACHINE By Bertram Hunt (September 26, 1908) I first applied over fifteen years ago, and has been used most successfully in leaching gold-slime. In making the filter-bed, slats of triangular section are placed side by side but not touching, a space of about one-quarter or three-eighths of an inch being left between the bases of the slats. Carefully screened gravel, a...


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Product Details
  • ISBN-13: 9781152425507
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 174
  • Spine Width: 9 mm
  • Width: 189 mm
  • ISBN-10: 1152425501
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 322 gr


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