Search Swinburne Research Bank
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/220510
- The treatment of arsenic and antimony oxide fumes
- Brooks, Geoffrey A.; Rankin, W. J.; Papp, R.
- The problem of treating concentrates with increasingly higher levels of arsenic and antimony is compounded by the trertd to stricter environmental guidelines regarding the disposal of smelter wastes. Much of the arsenic and antimony from non-ferrous processes is recovered as oxide fume. The options for handling these fumes include recycling them to the smelter, stabilising and disposing of them, and recovering values from them. Whilst arsenic oxide has little value, there is a market for antimony oxide and this provides an incentive for devising techniques for separating antimony oxide from arsenic oxide before disposal of the arsenic oxide. Arsenic can be separated from antimony oxide by selectively volatilising the more volatile arsenic trioxide from a mixed oxide sample or by selectively condensing the less volatile antimony tetroxide at high temperatures, leaving arsenic trioxide to condense out at lower temperatures. The results of selective volatilisation experiments at 379 to 587 degrees Celsius indicate that it is difficult to achieve an arsenic content below 5.0 wt. % using air or nitrogen as carrier gas due to the formation of solid solutions between the two oxides. Injection of oxygen into a mixed vapor stream improved separation by selective condensation and antimony tetroxide containing as low as 0.23 wt. % was obtained in laboratory experiments.
- Publication type
- Conference paper
- Proceedings of 'Pyrometallurgy for complex materials and wastes: an international conference', Melbourne, Victoria, Australia, 06-08 June 1994 / M. Nimani, T. Lehner and W. J. Rankin (eds.), pp. 277-287
- Publication year
- Antimony; Arsenic; Gas injection; Process development; Pyrometallurgy; Volatilisation; Waste recovery; Waste treatment
- The Minerals, Metals and Materials Society
- 9780873392273, 0873392272
- Publisher URL
- Copyright © 1994.
- Peer reviewed