|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Assessing the Role of Smelter Grade Alumina Porosity in the HF Scrubbing Mechanism
||Gordon Agbenyegah, Grant McIntosh, Margaret Hyland, Jim Metson
|On-Site Speaker (Planned)
The HF scrubbing capacity of SGA and its HF generating potential have been discussed in recent and past publications. Researchers are still in search for the ideal SGAs with optimum surface area and calcination levels that meet potroom and GTC specifications. It has been shown that pore size distribution is a critical parameter for assessing the suitability of SGAs for GTC operations as the bulk of the accessible surface area for HF scrubbing is attributable to internal porosity. Laboratory scale experiments have been carried out to understand the evolution of the bulk alumina pore network as reaction with humid HF gas proceeds. A reduction in reacted alumina BET surface area and total pore volume is observed with time, after a marginal initial increase. In this paper, we discuss findings on the involvement of pores in the mechanism of HF scrubbing and its possible influence on the fluoride capture kinetics.
||Planned: Light Metals Volume