Effect of heat treatment on grindabilities of celestite and gypsum and separation of heated mixture by differential grinding

Sener S., Bilgen S., Ozbayoglu G.

MINERALS ENGINEERING, vol.17, no.3, pp.473-475, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 3
  • Publication Date: 2004
  • Doi Number: 10.1016/j.mineng.2003.10.017
  • Journal Name: MINERALS ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.473-475
  • Keywords: industrial minerals, grinding, sorting methods, THERMAL DEHYDRATION, NATURAL GYPSUM
  • Middle East Technical University Affiliated: No

Abstract

This study was conducted to determine thermal decomposition of gypsum (CaSO4 . 2H(2)O) and celestite (SrSO4), to examine the effect of heating on grindability and the possibility of celestite-gypsum separation by differential grinding after heating. The results indicated that no significant decomposition reaction was observed in celestite up to 900 degreesC whereas the decomposition of gypsum occurred within 100-450 degreesC.