RECOVERY OF VANADIUM, NICKEL AND MAGNESIUM FROM A FLY-ASH OF BITUMEN-IN-WATER EMULSION BY CHLORINATION AND CHEMICAL-TRANSPORT

Citation
K. Murase et al., RECOVERY OF VANADIUM, NICKEL AND MAGNESIUM FROM A FLY-ASH OF BITUMEN-IN-WATER EMULSION BY CHLORINATION AND CHEMICAL-TRANSPORT, Journal of alloys and compounds, 264(1-2), 1998, pp. 151-156
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
ISSN journal
0925-8388
Volume
264
Issue
1-2
Year of publication
1998
Pages
151 - 156
Database
ISI
SICI code
0925-8388(1998)264:1-2<151:ROVNAM>2.0.ZU;2-5
Abstract
Vapor phase extraction of vanadium, nickel and magnesium from a fly as h of Orimulsion(R), a new fuel, has been investigated using high-tempe rature chlorination with N-2-Cl-2 or air-Cl-2 mixture. The use of N-2- Cl-2 gas was suited for a selective chlorination of metal components. Vanadium and iron were extracted at 400 and 500 degrees C, respectivel y, as oxychloride or chloride vapors. Mutual separation of nickel and magnesium components was achieved by (i) a selective chlorination foll owed by vaporization of NiCl2 in the temperature range 650-700 degrees C or (ii) a chemical transport reaction mediated by vapor complexes w ith Al2Cl6(g) along a modified temperature gradient. During the chlori nation, NOx, NH3, SO3 and H2O gases were generated and chlorination sc hemes were discussed based on the composition of the exhaust gas. (C) 1998 Elsevier Science S.A.