|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||In-situ XRD Investigation of Bauxite Dehydroxylation
||Hong Peng, James Vaughan
|On-Site Speaker (Planned)
Thermal activation of bauxite has been proposed to enable bauxite dissolution at a reduced digestion temperature and also to reduce the organic content in the liquor. Research has been carried out on phase transformation of its main hydroxide components (gibbsite, boehmite and kaolinite) during calcination. However, there is limited research on phase transformation of the bauxite ore during thermal activation. In this study, Two bauxite ore samples were heated from 25-700˚C with at a rate of 50˚C/min while monitoring the phase transformation using Rigaku in-situ XRD. Different phase transformation pathways for gibbsite in the bauxite compared with pure gibbsite was observed. Boehmite and kaolinite in bauxite behaved similarly to their pure phases. The temperature of phase transformation depends to some extent on the bauxite sample. Samples were also characterised by scanning electron microscopy (SEM) to reveal changes in the microstructure.
||Planned: None Selected