LEACHING KINETICS OF MALACHITE IN AMMONIA SOLUTIONS

KUNKUL A., KOCAKERIM M., YAPICI S., DEMIRBAG A.

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, cilt.41, ss.167-182, 1994 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/0301-7516(94)90026-4
  • Dergi Adı: INTERNATIONAL JOURNAL OF MINERAL PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Metadex, DIALNET, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.167-182
  • İnönü Üniversitesi Adresli: Evet

Özet

In this study, the leaching kinetics of malachite in ammonia solutions was investigated in a magnetically stirred reactor, taking particle size, ammonia concentration, solid/liquid ratio and reaction temperature as parameters. It was observed that the leaching rate increases with increasing ammonia concentration, reaction temperature, decreasing solid/liquid ratio and particle size. The reaction order to the solid concentration is determined to be 1.0. It was also determined that the leaching process was controlled by the diffussion through the ash layer, which is the insoluble inert gangue material consisted of mainly SiO2, around the shrinking unreacted core. The activation energy for the leaching process was found to be 22.338 kJ mol-1, and the Arrhenius constant was calculated to be 2.188 s-1.