Improvement of a continuous process for the production of tungstic trioxide from scheelite: M34-20/104E-PDF
preleaching the scheelite with weak hydrochloric acid /
“The effect of leaching Canadian scheelite concentrates with weak hydrochloric acid at pH 1.0 prior to treatment by a previously described Mines Branch process was investigated. The work showed that the weak-acid leach removed about 25 per cent of the iron, 90 per cent of the phosphorus, 10 per cent of the calcium and 0.1 per cent of the tungsten from a scheelite concentrate analysing 54.4 per cent WO3 , 15.8 per cent CaO, 3.9 per cent Fe, and 0.43 per cent P. The overall cost on the basis of acid consumption and tungsten loss would be about $0.04 less per pound of tungsten than for the original Mines Branch process where the weak-acid leach was not used"--Abstract, p. i.
|Department/Agency||Natural Resources Canada. Mines Branch.|
|Title||Improvement of a continuous process for the production of tungstic trioxide from scheelite|
|Subtitle||preleaching the scheelite with weak hydrochloric acid /|
|Series Title||Technical bulletin ;|
|Publication Type||Series - View Master Record|
|Electronic Document|| |
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|Note||Cover title. "December 1969." Digitized edition from print [produced by Natural Resources Canada].|
|Number of Pages||iv, 7 p.|
|Departmental Catalogue Number||299990|
|Subject Terms||Chemicals, Processing|
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