A laboratory protocol to evaluate potential chemical interferences in flotation circuit applications

CIM Journal, Vol. 7, No. 2, 2016

B. G. Cousins and B. O’Rourke
Formerly of Ashland Water Technologies, Mississauga, Ontario, Canada

C. Spence
Formerly of Hudbay, Flin Flon, Manitoba, Canada

http://dx.doi.org/10.15834/cimj.2016.14
Résumé Un danger potentiel qui devrait être évalué durant les études d’exploitation par blocs foudroyés est la possibilité d’afflux de boue. Le phénomène des afflux de boue peut avoir des origines très diverses; les résultats sont cependant les mêmes : des blessures, des pertes de vie, des dommages à la propriété, une dilution excessive, des délais de production ou des fermetures de mines. Bien que les afflux de boue soient plus fréquents dans les mines exploitées par blocs foudroyés, toute activité minière qui permet l’accumulation de particules fines et d’eau est sujette à des coulées de boue. Le présent article décrit le processus développé par les auteurs au cours de la dernière décennie pour évaluer le risque d’afflux de boue, surtout dans les mines exploitées par blocs foudroyés et par sousniveaux foudroyés.
Mots clés : Cinétiques, flottation, interférences, produits chimiques
Accés complet à Document technique
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Publication: CIM Journal
Numéro: 2
Volume: 7
Année: 2016
Texte
Sommaire: Block caving is the preferred underground mining method to profitably extract massive, low-grade orebodies; however, lack of cave access inhibits understanding the rockmass response to mining, which is needed for safer, more productive operations. Combining large datasets from multiple sources with virtual reality scientific visualization (VRSV) is an alternative method for understanding complex cave behaviour, by providing virtual access to the cave. A customized VRSV module was developed at...
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Numéro: 2
Volume: 7
Année: 2016
Texte
Sommaire: The relative-value (R-value), discrimination-factor (D-factor), and vector-ratio (V-ratio) method (RDVM) provides a geological knowledge-based statistical and geological-genetic interpretation scheme for geochemical data that enhances discovery in geochemical exploration. The practical advantage of RDVM is that it synthesizes geochemical features geologically related to ore-deposit discovery in three steps: reclassifying element concentrations using log-probability plots into R-values;...
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Numéro: 2
Volume: 7
Année: 2016
Texte
Sommaire: The inverse slope method (ISM) was applied to reinterpret vertical electrical soundings (VES) data from pits at the Al-Sharquieh phosphate mine, in order to demonstrate applicability and suitability of the ISM for interpreting VES data from sedimentary phosphatic environments. The ISM overcomes limitations of the curve matching method and the complexity of lithological sections. The ISM geo-electrical interpretation results correlated well with lithologies of the pits. This method characteriz...
Publication: CIM Journal
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Numéro: 2
Volume: 7
Année: 2016
Texte
Sommaire: Microseismic monitoring provides insight into the location and extent of rock-mass fracturing induced by cave mining, enabling interpretation of the cave profile and validation of predictive numerical models. Source location uncertainties can lead to misinterpretation of the inferred characteristics of the fracture network. One principal source of uncertainty is the velocity model used to invert the location algorithm. Large-scale 3D numerical models of modulus changes across a caved mass can...
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Auteur(s): J. M. Reyes-Montes, B. L. Sainsbury, J. R. Andrews, R. P. Young
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Numéro: 2
Volume: 7
Année: 2016
Texte
Sommaire: The St. Lawrence Granite hosts vein-type fluorite mineralization that was mined until 1977. Recent drilling identified a significant fluorite-bearing structure hosted in adjacent meta-sedimentary country rocks. Several phases of vein fill and brecciation indicate there are three phases of fluorite mineralization, of which the later two phases are volumetrically significant. The earliest fluorite is purple and occurs along joint and fracture surfaces, in fault-breccia matrices, and as...
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Auteur(s): J. H. Reeves Newspar, B. A. Sparkes, N. Wilson Newspar
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Volume: 7
Année: 2016
Texte
Sommaire: This paper outlines geotechnical conditions that commonly exist in underground, hardrock mines and the challenges posed for ground-support steel, specifically rockbolts, used in these environments. A model is proposed whereby the in-situ stress and rock-mass classifications (based on Bieniawski’s rock mass rating) form the basis of determining the desired steel properties of the rockbolts used. Based on the ASTM F432 bolting specification, recommended minimum steel properties are defined for...
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Auteur(s): M. R. P. Snow
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Numéro: 2
Volume: 7
Année: 2016
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