Chemistry of acid production in black coal mine washery wastes

S Devasahayam*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Column leaching tests on black coal mine washery wastes were performed, to determine the chemistry of acid generation. Coal mine coarse rejects and tailings were subjected to wet and dry cycle dissolution and subsequently column leached. The rates of iron sulphide oxidation and carbonate mineral dissolution were determined based on the drainage chemistry. The kinetic data from column leach experiments are used to predict the time required to deplete the acid producing and acid consuming minerals in the mine wastes. The acid production in the mine rejects was found to depend upon iron chemistry, carbonate chemistry, diffusion of oxygen, and permeability. The chemistry of the drainage from two different coal mines is compared. (c) 2005 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalInternational Journal of Mineral Processing
Volume79
Issue number1
DOIs
Publication statusPublished - Apr 2006
Externally publishedYes

Keywords

  • acid mine drainage
  • coal mine washery wastes
  • column testing
  • iron sulphide chemistry
  • carbonate chemistry
  • SULFATE
  • BASALUMINITE
  • ALUMINUM
  • ALUNITE
  • SOLUBILITY
  • JAROSITE
  • DRAINAGE
  • WATERS

Cite this