Magnesium recovery from magnesite tailings by acid leaching and production of magnesium chloride hexahydrate from leaching solution by evaporation
INTERNATIONAL JOURNAL OF MINERAL PROCESSING, cilt.93, sa.2, ss.209-212, 2009 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 93 Sayı: 2
- Basım Tarihi: 2009
- Doi Numarası: 10.1016/j.minpro.2009.08.001
- Dergi Adı: INTERNATIONAL JOURNAL OF MINERAL PROCESSING
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.209-212
- Anahtar Kelimeler: Magnesite tailings, Hydrochloric acid, Magnesium leaching, Magnesium chloride hexahydrate, DISSOLUTION KINETICS, NATURAL MAGNESITE
- Eskişehir Osmangazi Üniversitesi Adresli: Evet
Özet
The recovery of magnesium from magnesite tailings in aqueous hydrochloric acid solutions by acid leaching was studied in a batch reactor using hydrochloric acid solutions. Subsequent, production of magnesium chloride hexahydrate (MgCl(2 center dot)6H(2)O) from leaching solution was also investigated. The effects of temperature, acid concentration, solid-to-liquid ratio, particle size and stirring speed on the leaching process were investigated. The pseudo-second-order reaction model seemed to be appropriate for the magnesium leaching. The activation energy of the leaching process was estimated to be 62.4 kJ mol(-1). Finally, MgCl(2 center dot)6H(2)O in a purity of 91% was produced by evaporation of leaching solution obtained at a temperature of 40 degrees C, 1.0 M acid, solid-to-liquid ratio of 10 g/L, particle size of 100 mu m, stirring speed of 1250 rpm and leaching time of 60 min. (C) 2009 Elsevier B.V. All rights reserved.