|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Predictive Formula for the Competitive Adsorption of HF and SO2 on Smeltergrade Alumina Used in Dry Scrubbing Applications
||Stephan Broek, Neal Dando, Stephen Lindsay
|On-Site Speaker (Planned)
Smeltergrade alumina (SGA) is the preferred agent for recovering HF from aluminum smelter ventilation gas streams since the alumina also serves as feed to the electrolysis cells, thereby allowing return of the recovered fluoride to the process. This alumina-based recovery loop includes sulfur, since SO2 evolved from cells is also adsorbed on SGA that is not completely saturated by HF. Previously, Dando and Lindsay reported on the competitive adsorption of HF and SO2 on smeltergrade alumina by investigating the temporal breakthrough behavior of both HF gas and SO2 gas to quantify the two physically different mechanisms behind adsorption of both gases on the same particle of alumina. In this paper follow on work is reported where this research data is converted into usable, empirical formulae and examples of applications that may be useful to engineers and technicians in making predictions on the removal of SO2 in a alumina dry scrubber.
||Planned: Light Metals