Development, testing and applications of an induction-balance sensor for low-grade nickel ores

CIM Journal, Vol. 1, No. 2, 2010
A. S. Bamber, University of British Columbia, British Columbia and D. J. Houlahan, MineSense Technologies, British Columbia
Abstract

Sorting has the potential to massively improve the profitability of mining base metal, hardrock ores. However, several barriers to the increased application of sorting have been identified, including a lack of mineral-specific sensors available to the industry. This paper presents the outcomes of a collaborative project to develop an induction-balance sensor specifically for low-grade copper and nickel ores. A review of the basic principles of induction-balance sensing and of the sensor-rock interaction is presented. Early development and testing of the sensor on ores from the Thompson nickel belt in northern Manitoba is discussed. Shortcomings of the prototype identified in early testing have now been overcome, leading to improvements in design and construction, as well as sensor accuracy. The improved sensor has now been tested on additional ores from the Sudbury Basin, with good results. A discussion of potential applications is presented and recommendations for future development are made.


Le tri a le potentiel de grandement améliorer la rentabilité des mines de métaux de base en roche dure. Toutefois, de nombreuses barrières à l’application du tri ont été identifiées, dont un manque de capteurs spécifiques aux minerais qui seraient disponibles pour l’industrie minière. Cet article présente les résultats d’un projet en participation pour développer un détecteur à balance d’induction spécialement conçu pour les minerais de cuivre et de nickel à basse teneur. Une révision des principes de base de la balance d’induction et de l’interaction roche-capteur est présentée. On discute des premiers développements et essais du capteur sur des minerais de la ceinture de nickel de Thompson dans le nord du Manitoba. Les faiblesses qui ont été identifiées sur le prototype lors des premiers essais ont été corrigées, menant à des améliorations de conception, de construction et de la précision du capteur. Le capteur amélioré a été mis à l’épreuve sur d’autres minerais du bassin de Sudbury avec de bons résultats. On discute des applications potentielles et on présente des recommandations pour un développement futur.
Keywords: Induction-balance sensing, Grade monitoring, Down-the-hole sensing, Conductivity sorting, Research and development (R&D), Détection par balance d’induction, Suivi de la teneur, Détection en fond-de-trou, Tri par conductivité, Recherche et développement
Full Access to Technical Paper
PDF version for $20.00
Other papers in CIM Journal, Vol. 1, No. 2, 2010
Search
Sort By:  Relevance
Showing results 1 - 7
Text
Summary:  
Publication: CIM Journal
Issue: 2
Volume: 1
Year: 2010
Text
Summary: The ground penetrating radar (GPR) method was used in a platinum mine in Zimbabwe by members of the Federal Institute for Geosciences and Mineral Resources (BGR). The measurements were carried out in boreholes and drifts. Electromagnetic reflections from a fault that consistently trends parallel to the mineralization zone permitted the mapping of the economically minable parts of the deposit. An introduction is given to the geology of the studied area and the application of the GPR method....
Publication: CIM Journal
Author(s): D. Eisenburger, C. Grissemann, V. Gundelach, W. Kahnt, and T. Oberthür, Federal Institute for Geosciences and Natural Resources, Hannover, Germany and
R. Thierbach, Ronnenberg, Germany
Keywords: Ground penetrating radar, Great Dyke, Main sulphide zone, Zimbabwe, Platinum mine, Géoradar, Grand Dyke, Zone principale de sulfures, Zimbabwe, Mine de platine
Issue: 2
Volume: 1
Year: 2010
Text
Summary: An overall study was conducted to evaluate the properties and processes influencing the rate and magnitude of consolidation for oil sands fine tailings produced using different extraction processes. As part of this overall study, consolidation tests using slurry consolidometers were carried out for caustic and non-caustic fine tailings. The influence of a change in bitumen extraction process (caustic versus non-caustic) on consolidation properties, namely compressibility and hydraulic...
Publication: CIM Journal
Author(s): W. G. Miller, WorleyParsons Services, Perth, Australia and J. D. Scott and D. C. Sego, University of Alberta, Edmonton, Alberta
Keywords: Oil sands, Fine tailings, Compressibility, Hydraulic conductivity, Consolidation, Large strain, Volume change, Void ratio, Settlement, Effective stress, Dispersion, Coagulant, Sodium adsorption ratio, Sables bitumineux, Résidus fins, Compressibilité, Conductivité hydraulique, Consolidation, Grande contrainte, Changement de volume, Indice des vides, Tassement, Contrainte effective, Dispersion, Coagulant, Taux d’adsorption du sodium
Issue: 2
Volume: 1
Year: 2010
Text
Summary: The ground-source heat pump is a low-carbon technology that uses the earth’s renewable geothermal energy to heat and cool buildings, with an efficiency 3 to 4.5 times that of conventional systems. These high performances are achieved by exchanging heat with the earth using a fluid that is groundwater, surface water or closed loop water. Expensive installations, such as water wells or buried coils, are however necessary to transport the fluid in and out of the earth, making ground-source heat...
Publication: CIM Journal
Author(s): J. Raymond, R. Therrien, and L. Gosselin, Université Laval, Québec, Québec
Keywords: Geothermal, Energy, Heat pump, Waste dump, Mouska, Doyon, Abitibi, Géothermie, Énergie, Thermopompe, Halde à stériles
Issue: 2
Volume: 1
Year: 2010
Text
Summary: The shaft bottom junction in a mine ventilation system is an important source of shock loss due to the combined effect of bend and area change. The occurrence of high-volume flow rates through this configuration can potentially result in high energy losses. The current research examines the process of shock loss at a characteristic shaft bottom junction of an underground coal mine. Investigations are performed on both laboratory-scale models and three-dimensional computational fluid dynamics...
Publication: CIM Journal
Author(s): T. Purushotham, University of Alaska, Fairbanks, Alaska, B. S. Sastry and B. Samanta, Indian Institute of Technology, Kharagpur, India
Keywords: k-? turbulence model, Forcing and exhausting ventilation shafts, Relative roughness, Shaft bottom length, Geometric and dynamic similitude, Modèle de turbulence, Puits d’évacuation et de forçage de la ventilation, Rugosité relative, Longueur au fond du puits, Similitude géométrique et dynamique
Issue: 2
Volume: 1
Year: 2010
Text
Summary: An overall study was conducted to evaluate the properties and processes influencing the rate and magnitude of consolidation for oil sands fine tailings produced using different extraction processes. As part of the overall study, a comprehensive description of physical and chemical characteristics of fine tailings generated by caustic and non-caustic processes was carried out. Ultimately, the influence of these fundamental properties on the compressibility, hydraulic conductivity and shear...
Publication: CIM Journal
Author(s): W. G. Miller, WorleyParsons Services, Perth, Australia, J. D. Scott and D. C. Sego, University of Alberta, Edmonton, Alberta
Keywords: Oil sands, Fine tailings, Index properties, Specific surface area, Water chemistry, Particle size distribution, Dispersion, Flocculation, Structure, Sodium adsorption ratio, Fines content, Coagulant, Sables bitumineux, Résidus fins, Propriétés caractéristiques, Surface spécifique, Hydrochimie, Granulométrie, Dispersion, Floculation, Structure, Rapport d’adsorption du sodium, Teneur en particules fines, Coagulant
Issue: 2
Volume: 1
Year: 2010
Text
Summary: The development and evolution of the gravity recoverable gold (GRG) test procedure at McGill University is reviewed in this paper. Since the late 1980s, the research group led by the late Professor André Robert Laplante at McGill University has undertaken fundamental studies and applied research of the Knelson concentrator to develop a sustainable method of estimating GRG. Historically, a concept of “free gold” was used, and it was defined as the gold that could be separated and recovered...
Publication: CIM Journal
Author(s): L. Huang and S. Koppalkar, COREM, Québec, Québec
Keywords: Gravity recoverable gold, Gold ore characterization, Knelson concentrator, Centrifugal separation, Or à récupération gravimétrique, Caractérisation de minerais aurifères, Concentrateur Knelson, Separation centrifuge
Issue: 2
Volume: 1
Year: 2010
Powered by Coveo Enterprise Search