SciELO - Scientific Electronic Library Online

vol.120 issue5Preliminary investigation into the extraction of light rare earth elements from different resources using the sulphation roasting processAn investigation into the wear mechanisms of carbon- and silicon carbide-based refractory materials by silicomanganese alloy author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • On index processSimilars in Google


Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717
Print version ISSN 2225-6253


GIROUX, J. et al. In-truck ore grade estimation using apparent density measurements. J. S. Afr. Inst. Min. Metall. [online]. 2020, vol.120, n.5, pp.327-332. ISSN 2411-9717.

The Rio Tinto Iron and Titanium (RTIT) Havre St-Pierre (HSP) mine located in Quebec, Canada has implemented a grade estimation system based on the determination of the apparent density of the material loaded into mine trucks. The system is used to segregate economic ore from waste as part of the re-handling of a historical waste stockpile. The system takes advantage of the strong relationship established between ore density and grade for the HSP mineralization. The apparent density is derived from the measurements of (i) the volume of the truck load using a laser-based scanner and (ii) the mass of the truck load provided by an onboard truck scale. The ore grade is then calculated by applying a void factor to the apparent density measurement. In the future, this in-truck grade estimation technology could be expanded to the entire mine operations and be instrumental in ore vs waste discrimination and production reconciliation.

Keywords : grade estimation; apparent density; laser scanning.

        · text in English     · English ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License