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.

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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
Language [English]
Format Electronic
Electronic Document

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Note Cover title. "December 1969." Digitized edition from print [produced by Natural Resources Canada].
Date 1970.
Number of Pages iv, 7 p.
Catalogue Number
  • M34-20/104E-PDF
Departmental Catalogue Number 299990
Subject Terms Chemicals, Processing