Documents disponibles écrits par cet auteur

Mitigating the generation of acid mine drainage from copper sulfide tailings impoundments in perpetuity / A.H. Hesketh in Minerals engineering, Vol. 23 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 3 (Fevrier 2010) . - pp. 225–229 Titre : Mitigating the generation of acid mine drainage from copper sulfide tailings impoundments in perpetuity : A case study for an integrated management strategy Type de document : texte imprimé Auteurs : A.H. Hesketh, Auteur ; J. L. Broadhurst, Auteur ; S.T.L. Harrison, Auteur Année de publication : 2011 Article en page(s) : pp. 225–229 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Acid  mine  drainage  Sulfide  ores  Froth  flotation  Tailings  disposal  Waste  processing Résumé : Acid mine drainage (AMD) is one of the most serious and pervasive challenges facing the minerals industry. Current philosophy in sulfide tailings management takes an end-of-pipe approach which is yet to be shown to be sufficient to prevent post-closure impacts from AMD and guarantee “walk-away” status. An improved, integrated approach to tailings management and AMD mitigation is proposed, whereby conventional tailings are separated with the use of flotation into a largely benign tailings stream and a sulfide-rich product. The key features of this conceptual approach are outlined and partly demonstrated for the case of porphyry-type copper sulfide tailings. The significance of this approach is that it provides a basis for the identification of opportunities for the development of new process designs incorporating waste management systems for mitigating AMD in a manner consistent with the principles of cleaner production and sustainable development. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002453 [article] Mitigating the generation of acid mine drainage from copper sulfide tailings impoundments in perpetuity : A case study for an integrated management strategy [texte imprimé] / A.H. Hesketh, Auteur ; J. L. Broadhurst, Auteur ; S.T.L. Harrison, Auteur . - 2011 . - pp. 225–229. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 3 (Fevrier 2010) . - pp. 225–229 Mots-clés : Acid  mine  drainage  Sulfide  ores  Froth  flotation  Tailings  disposal  Waste  processing Résumé : Acid mine drainage (AMD) is one of the most serious and pervasive challenges facing the minerals industry. Current philosophy in sulfide tailings management takes an end-of-pipe approach which is yet to be shown to be sufficient to prevent post-closure impacts from AMD and guarantee “walk-away” status. An improved, integrated approach to tailings management and AMD mitigation is proposed, whereby conventional tailings are separated with the use of flotation into a largely benign tailings stream and a sulfide-rich product. The key features of this conceptual approach are outlined and partly demonstrated for the case of porphyry-type copper sulfide tailings. The significance of this approach is that it provides a basis for the identification of opportunities for the development of new process designs incorporating waste management systems for mitigating AMD in a manner consistent with the principles of cleaner production and sustainable development. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002453

Ranking and scoring potential environmental risks from solid mineral wastes / J. L. Broadhurst in Minerals engineering, Vol. 23 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Minerals engineering > Vol. 23 N° 3 (Fevrier 2010) . - pp. 182–191 Titre : Ranking and scoring potential environmental risks from solid mineral wastes Type de document : texte imprimé Auteurs : J. L. Broadhurst, Auteur ; J.G. Petrie, Auteur Année de publication : 2011 Article en page(s) : pp. 182–191 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Environmental  Pollution  Sulfide  ores  Tailings  disposal Résumé : The overall environmental performance of minerals beneficiation operations, in addition to their significant energy demand, is largely a function of the success or failure of waste management strategies to minimise the long-term impacts associated with the disposal of vast volumes of solid waste. Whilst forecasting such impacts, particularly in the early stages of a project, is arguably the most important element in an environmental performance assessment, it remains the most challenging. This paper describes a generic methodology which has been developed for ranking and scoring solid waste constituents on the basis of their hazard-forming potential and chemical behaviour under disposal conditions. The approach is demonstrated for the case of typical porphyry-type copper sulfide tailings. The predictive approach developed here is consistent with the screening phase of risk-based environmental assessment protocols, and is considered to be a vital and integral part of reliably quantifying the environmental life cycle impacts of solid mineral wastes. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002337 [article] Ranking and scoring potential environmental risks from solid mineral wastes [texte imprimé] / J. L. Broadhurst, Auteur ; J.G. Petrie, Auteur . - 2011 . - pp. 182–191. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 23 N° 3 (Fevrier 2010) . - pp. 182–191 Mots-clés : Environmental  Pollution  Sulfide  ores  Tailings  disposal Résumé : The overall environmental performance of minerals beneficiation operations, in addition to their significant energy demand, is largely a function of the success or failure of waste management strategies to minimise the long-term impacts associated with the disposal of vast volumes of solid waste. Whilst forecasting such impacts, particularly in the early stages of a project, is arguably the most important element in an environmental performance assessment, it remains the most challenging. This paper describes a generic methodology which has been developed for ranking and scoring solid waste constituents on the basis of their hazard-forming potential and chemical behaviour under disposal conditions. The approach is demonstrated for the case of typical porphyry-type copper sulfide tailings. The predictive approach developed here is consistent with the screening phase of risk-based environmental assessment protocols, and is considered to be a vital and integral part of reliably quantifying the environmental life cycle impacts of solid mineral wastes. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509002337