Effective methods to reduce grade variability in iron ore mine operations

Oscar Parra Trouchina, Erkan Topal

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper explores possible strategies to meet iron ore customer requirements (reduce variability and keep Fe% and contaminants such as Al2O3% and P% within the acceptable tolerance) by optimizing the mine plan and scheduling strategy in the rehandling process. The paper aims to obtain more homogenous iron ore grade by redesigning current rehandling strategy and creating selective Run of Mine (ROM) with defined Fe grade and contaminants tolerances in the supply chain process. A new Linear Programming Model was developed and sample data from an Iron Ore operation in Western Australia was used to conduct this analysis. The outcomes indicate that it is possible to achieve better grade results for Fe% and Al2O3% keeping required tonnage targets. Furthermore, the results reflect Low-Grade materials could play a more important role in the weekly schedule and that grade contents could balance alterations of High-Grade products. Although there are extra costs due to rehandling activities, these costs could be offset by selling more consistent products. It is an invitation to mining companies to change current strategy and focus more on the downstream and customer requirements in terms of quality product instead of just quantity.

Original languageEnglish
Title of host publicationProceedings of the 28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
EditorsErkan Topal
PublisherSpringer
Pages67-74
Number of pages8
ISBN (Print)9783030339531
DOIs
Publication statusPublished - 2020
Event28th International Symposium on Mine Planning and Equipment Selection, MPES 2019 - Perth, Australia
Duration: Dec 2 2019Dec 4 2019

Publication series

NameSpringer Series in Geomechanics and Geoengineering
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Conference

Conference28th International Symposium on Mine Planning and Equipment Selection, MPES 2019
CountryAustralia
CityPerth
Period12/2/1912/4/19

Keywords

  • Grade variability
  • Iron ore
  • Linear programming
  • Rehandling

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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