Non-isothermal leaching kinetics of braunite in water saturated with sulphur dioxide


Demirbas A.

RESOURCES CONSERVATION AND RECYCLING, vol.26, no.1, pp.35-42, 1999 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 26 Issue: 1
  • Publication Date: 1999
  • Doi Number: 10.1016/s0921-3449(98)00073-1
  • Title of Journal : RESOURCES CONSERVATION AND RECYCLING
  • Page Numbers: pp.35-42

Abstract

In the leaching of braunite in water, saturated with sulphur dioxide, it was observed that the leaching rate increases with increasing temperature, leaching time and stirring speed, and with decreasing solid-to-liquid ratio and particle size. The optimum conditions for leaching braunite using water, saturated with SO,, are temperature: 358 K, leaching time: 150 min, particle size: 80 mu m, solid-to-liquid ratio: 0.01 g ml(-1), and stirring speed: 4500 min(-1). The leaching kinetic parameters were the activation energy 65.3 kJ mol(-1), the pre-exponential factor; 4.51 x 10(12) min(-1), and rate constant 1.28 x 10(2) min(-2). (C) 1999 Elsevier Science B.V. All rights reserved.