Abrasion characteristics of ores

Sheila Devasahayam*

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Effects of time and size on t10, the abrasion parameter (fineness indicator) using a calibration model for a given ore type is presented. A model for predicting t10 from a small diameter core material for any ore type is also presented. The ores studied are: Ok Tedi 1, Ok Tedi 2, Red Dome, Alcoa, and Broken Hill. Shape factor of the particles that varies with both the particle size and the ore type affects the abrasion characteristics. Abrasion process in a tumbling mill is described by two mechanisms namely (1) chipping, and (2) abrasion, occurring at different rates. The chipping phenomenon depends on the ore and the shape factor. The abrasion phenomenon is independent of t10º(t10º is the ore-specific t10 at 7 x 10-4 kWh/t tumbling test energy) and the shape factor. Abrasion process occurs at a much slower rate compared to the chipping process. Transition between chipping and abrasion occurs approximately after 2 min of tumbling. The long-term rate is controlled by the abrasion or attrition rather than by the chipping mechanism.

Original languageEnglish
Pages (from-to)114-129
Number of pages16
JournalMineral Processing and Extractive Metallurgy Review
Volume34
Issue number2
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • abrasion parameter
  • effect of time
  • particle size distribution
  • reaction dynamics
  • shapes factor
  • tumbling mill

Cite this