Practical way to quantify minerals from chemical assays at Malmberget iron ore operations – An important tool for the geometallurgical program |
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| Affiliation: | 1. Division of Geosciences and Environmental Engineering, Luleå University of Technology, 971 87 Luleå, Sweden;2. Division of Sustainable Process Engineering, Luleå University of Technology, 971 87 Luleå, Sweden;3. LKAB, Research & Development, 983 81 Malmberget, Sweden;1. CODES ARC Centre of Excellence in Ore Deposits, University of Tasmania, Private Bag 79, Hobart, Tasmania 7001, Australia;2. JKMRC (Julius Kruttschnitt Mineral Research Centre), University of Queensland, Indooroopilly, Queensland 4068, Australia;3. OZ Minerals, Melbourne, Victoria 3000, Australia;4. CRC ORE (Optimising Resource Extraction), University of Queensland, St. Lucia, Queensland 4067, Australia;1. Flowsheets Metallurgical Consulting Inc., Canada;2. University of Queensland, Sustainable Minerals Institute, Australia;3. LKAB, Kiruna, Sweden;1. Universidad Católica del Norte, 0610 Angamos, Antofagasta, Chile;2. CSGS Canada Inc., 185 Concession Street, Lakefield, Ontario K0L 2H0, Canada;3. McGill University, 3610 University Street, Montreal, Quebec H3A 0C5, Canada |
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| Abstract: | This is the first step in establishing a geometallurgical program for the Malmberget iron ore deposit, northern Sweden. Geometallurgy captures geological and metallurgical (processing) information into a spatially-based predictive model of mineral processing characteristics. This paper describes the development of a practical, fast and inexpensive technique to quantify minerals from routine chemical assays. Ore samples and process samples from two different orebodies were used in the process of developing this element to mineral conversion technique that involved electron microprobe (EPMA), X-ray fluorescence (XRF) and SATMAGAN analyses. The method was validated against QEMSCAN analyses. From the calculated modal mineralogy an ore classification system was established based on the iron mineralogy, iron mineral grades and gangue mineralogy to create a preliminary geological/geometallurgical model of the ore. However, in a geometallurgical context the modal composition is not sufficient and the geological model requires information on mineral textures, too. |
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| Keywords: | Geometallurgy Iron ore QEMSCAN Modal mineralogy Geological model |
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