Engineering Volume 24

Engineering Volume 24

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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. 1878 edition. Excerpt: ... the chloride, while the soda of the salt becomes sulphate of soda. The calcined materials are next charged into wooden lixiviating tanks, where the soluble parts are dissolved out first by water, and subsequently by acid from the condensers into which the gases from the calcining furnaces are discharged. The solution of chloride of copper and sulphate of iron is pumped from one tank to the other, being brought successively in contact with fresher and fresher materials, until it acquires the desired strength, when it is passed on to the depositing tanks. The residue remaining in the lixiviating vats consists principally of peroxide of iron, and is sold to iron manufacturers under the well-known name of " Blue Billy." The depositing vats consist of ranges of rectangular wooden vessels disposed in a long pit in two rows with a space between them. In these vats is placed a quantity of scrap iron, and on this iron being subjected to the action of the liquor from the liiriviating vats the copper and iron change places, the iron entering into solution and the copper being deposited. This operation is assisted by heating the solution by the injection of steam, the portion of the steam pipe which enters the liquor being of wood, to avoid corrosion. VVhen the scrap iron has been dissolved and replaced by the deposited copper the liquor is run ofi to waste and the deposit collected and washed. This deposit contains from 70 to 75 per cent. of copper, and it is next smelted into pimple copper containing about 90 per cent. of pure copper, while further smeltings eventually bring it to the degree of fineness required. Such is a brief outline of the processes conducted at the T harsis Company's Works, which are of very considerable more

Product details

  • Paperback | 858 pages
  • 189 x 246 x 43mm | 1,501g
  • United States
  • English
  • black & white illustrations
  • 1236898710
  • 9781236898715