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| 02076cam 2200349za 4500 |
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| 001 | 9.841314 |
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| 003 | CaOODSP |
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| 005 | 20221107152045 |
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| 007 | cr ||||||||||| |
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| 008 | 170809s1970 onc ob f000 0 eng d |
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| 040 | |aCaOODSP|beng |
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| 041 | |aeng|bfre |
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| 043 | |an-cn--- |
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| 086 | 1 |aM34-20/104E-PDF|zM34-20/104 |
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| 100 | 1 |aVezina, J. A. |
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| 245 | 10|aImprovement of a continuous process for the production of tungstic trioxide from scheelite |h[electronic resource] : |bpreleaching the scheelite with weak hydrochloric acid / |cJ.A. Vezina and W.A. Gow, Extraction Metallurgy Division. |
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| 260 | |aOttawa : |bQueen's Printer, |c1970. |
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| 300 | |aiv, 7 p. |
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| 490 | 1 |aTechnical bulletin ; |vTB 104 |
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| 500 | |aCover title. |
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| 500 | |a"December 1969." |
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| 500 | |aDigitized edition from print [produced by Natural Resources Canada]. |
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| 504 | |aIncludes bibliographical references. |
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| 520 | 3 |a“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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| 546 | |aIncludes abstract in French. |
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| 692 | 07|2gccst|aChemicals |
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| 692 | 07|2gccst|aProcessing |
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| 700 | 1 |aGow, W. A. |
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| 710 | 1 |aCanada. |bNatural Resources Canada. |
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| 710 | 1 |aCanada. |bMines Branch. |
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| 830 | #0|aTechnical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch)|vTB 104|w(CaOODSP)9.834857 |
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| 856 | 40|qPDF|s1.34 MB|uhttps://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-104-eng.pdf |
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