Skip to main content
placeholder image

Changes in an Australian laterite ore during heat treatment

Conference Paper


Abstract


  • This paper examines an Australian garnieritic-type ore and changes in phase composition and morphology caused by heating in argon at 400-1000 °C using XRF, XRD, DTA/TG, SEM/EDS and BET analyses. The mineral phases detected by XRD in the original ore include chlorite, talcum, hematite and quartz. Traces of iron silicate, Fe-Cr spinel and monoxide phase (predominantly manganese oxide) were observed by EDS. Nickel was detected in chlorite, talcum, iron silicate and monoxide phase. Heat treatment at 400-500 °C did not change XRD patterns. At 600 °C dehydroxylation of the brucitic phase of chlorite occurred. Chlorite was converted into olivine (forsterite) and enstatite at 600-800 °C. Upon heating to 900-1000 °C, talcum was also converted into olivine and enstatite. Ni-bearing phases after heat treatment at 800-850 °C were forsterite, enstatite, talcum, iron silicate and monoxide.

Authors


  •   Yang, Jun (external author)
  •   Ostrovski, Oleg (external author)
  •   Zhang, Guangqing
  •   Jahanshahi, Sharif (external author)

Publication Date


  • 2012

Citation


  • Yang, J., Ostrovski, O., Zhang, G. & Jahanshahi, S. (2012). Changes in an Australian laterite ore during heat treatment. Nickel Processing''12 (Proceedings CD)

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/574

Abstract


  • This paper examines an Australian garnieritic-type ore and changes in phase composition and morphology caused by heating in argon at 400-1000 °C using XRF, XRD, DTA/TG, SEM/EDS and BET analyses. The mineral phases detected by XRD in the original ore include chlorite, talcum, hematite and quartz. Traces of iron silicate, Fe-Cr spinel and monoxide phase (predominantly manganese oxide) were observed by EDS. Nickel was detected in chlorite, talcum, iron silicate and monoxide phase. Heat treatment at 400-500 °C did not change XRD patterns. At 600 °C dehydroxylation of the brucitic phase of chlorite occurred. Chlorite was converted into olivine (forsterite) and enstatite at 600-800 °C. Upon heating to 900-1000 °C, talcum was also converted into olivine and enstatite. Ni-bearing phases after heat treatment at 800-850 °C were forsterite, enstatite, talcum, iron silicate and monoxide.

Authors


  •   Yang, Jun (external author)
  •   Ostrovski, Oleg (external author)
  •   Zhang, Guangqing
  •   Jahanshahi, Sharif (external author)

Publication Date


  • 2012

Citation


  • Yang, J., Ostrovski, O., Zhang, G. & Jahanshahi, S. (2012). Changes in an Australian laterite ore during heat treatment. Nickel Processing''12 (Proceedings CD)

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/574