Non-oxidative leaching of mechanically activated stibnite

  • Baláž P
  • Briančin J
  • Šepelák V
 et al. 
  • 4

    Readers

    Mendeley users who have this article in their library.
  • 33

    Citations

    Citations of this article.

Abstract

The results obtained by leaching stibnite with a basic solution of sodium hydrogen sulphide are presented in this paper. The intensification of leaching by the mechanical activation produced by grinding the mineral in a planetary mill for 20 min brings about acceleration of the process by tenfold. The non-oxidative leaching of stibnite is a structure-sensitive process and the structure sensitivity decreases if assemblages of particles, i.e., agglomerates arise. The activation energy calculated from the temperature dependence of leaching in the region 293-345 K had the value E=28 kJ mol-1for a non-activated sample (standard) and E=13 kJ mol-1for a sample activated for 20 min. This suggests that the rate-determining step must have been changed. The SEM investigation of the residues after leaching documents the morphological non-uniformity of the leaching process. © 1992.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • P. Baláž

  • J. Briančin

  • V. Šepelák

  • T. Havlík

  • M. Škrobian

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free