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Beneficiation tests of hematite ore from Malmberget
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
2023 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This study investigates the beneficiation potential of hematite ore sourced from the Printzsköld-Alliansen ore body in the Malmberget deposit. The research encompasses mineralogical analyses and a range of processing techniques, including gravity and magnetic separation, to uncover valuable insights into the ore's behavior during beneficiation. The study's methodology includes Chemical and Elemental Analysis, Processing Techniques, and Beneficiation Outcomes. The chemical composition revealed a significant amount of Fe content of 65% and a low phosphorus content of 0.66% in the ore. Micro-XRF and XRF analyses further characterized the ore, highlighting the variations in the titanium and vanadium content compared to other sources of hematite ore. Hematite ore processing was conducted using Low-Intensity Magnetic Separation (LIMS), dry and wet grinding, shaking table, and Dry High-Intensity Magnetic Separation (HIMS). The particle size distribution was controlled to enhance separation efficiency. HSC Sim, HSC Mass Balance, and HSC EMC software simulations were used to calculate the ore's behavior during the processing stages. The final results revealed a high recovery of hematite through primary LIMS and a successful removal of silica and phosphorus during subsequent stages. Similarly, the shaking table successfully removed significant percentages of silica (39-70%) and phosphorus (20-48%) from the representative samples, highlighting its significance in eliminating gangue minerals to enhance the concentrate quality. HIMS exhibited a potential to separate gangue minerals, though challenges were encountered as a result of the presence of fine particles that affected the separation efficiency. Successful beneficiation stages led to an overall improvement in ferrous and silicate grades and reduced phosphorus content. Furthermore, the analysis of Fe, Si, P, and Al grades in feed and product samples demonstrated the positive impact of the beneficiation process. Recommendations for treating representative samples together were highlighted, considering variations in mineralogy, interlocking minerals, and porosity. In summary, this comprehensive investigation provides valuable information on the behavior of hematite ore during beneficiation, contributing to the development of effective processing strategies.

Place, publisher, year, edition, pages
2023. , p. 99
Keywords [en]
Hematite ore, beneficiation potential, processing techniques, mineralogical analysis, magnetic separation, gravity separation, particle size distribution, sustainable resource utilization
National Category
Geology
Identifiers
URN: urn:nbn:se:ltu:diva-101453OAI: oai:DiVA.org:ltu-101453DiVA, id: diva2:1800317
External cooperation
LKAB
Educational program
Master Programme in Georesources Engineering
Presentation
2023-06-04, 09:10 (English)
Supervisors
Examiners
Available from: 2023-09-27 Created: 2023-09-26 Last updated: 2023-09-27Bibliographically approved

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