000	00000nam 2200000za 4500
001	9.841314
003	CaOODSP
005	20221107152045
007	cr |||||||||||
008	170809s1970    onc     ob   f000 0 eng d
040	|aCaOODSP|beng
041	|aeng|bfre
043	|an-cn---
086	1 |aM34-20/104E-PDF|zM34-20/104
100	1 |aVezina, J. A.
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.
260	|aOttawa : |bQueen's Printer, |c1970.
300	|aiv, 7 p.
490	1 |aTechnical bulletin ; |vTB 104
500	|aCover title.
500	|a"December 1969."
500	|aDigitized edition from print [produced by Natural Resources Canada].
504	|aIncludes bibliographical references.
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.
546	|aIncludes abstract in French.
692	07|2gccst|aChemicals
692	07|2gccst|aProcessing
700	1 |aGow, W. A.
710	1 |aCanada. |bNatural Resources Canada.
710	1 |aCanada. |bMines Branch.
830	#0|aTechnical bulletin (Canada. Dept. of Energy, Mines and Resources. Mines Branch)|vTB 104|w(CaOODSP)9.834857
856	40|qPDF|s1.34 MB|uhttps://publications.gc.ca/collections/collection_2017/rncan-nrcan/M34-20/M34-20-104-eng.pdf
986	|a299990