Suitability of PEM fuel cells for underground mining vehicles

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Sommaire: An AG/SAG mill was commissioned at the Brunswick mine concentrator in October 1998. This paper discusses the original shell top hat liner design for the bi-directional AG/SAG mill, observed liner wear, subsequent liner design modifications, and benefits.
The original liners were steel chrome-moly steel Norsteel with rubber grates and rubber-lined pulp lifters. The design was based on experiences of other AG/SAG mills and recommendations by the liner supplier, Norcast. Liner design modificati...
Publication: CIM Bulletin
Auteur(s): I. Orford, M. Cooper, C. Larsen, M. Renaud, P. Radziszewski, L. Strah
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: The blast furnace flue dust constitutes a substantial quantity of the wastes generated in the integrated steel plants. It is generally stored inside the plant premises causing environmental and space problems. Chemical analysis of a typical BF flue dust sample indicates that it contains high values of iron and carbon accompanied by harmful elements like Na, K, Zn, Pb, etc. depending on the chemistry of raw material used in the blast furnace operation. These elements are considered a major...
Publication: CIM Bulletin
Auteur(s): P.K. Naik, B. Das, P.S.R. Reddy, V.N. Misra
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: The engineering properties of rocks are directly affected by their mineralogical and petrographical properties. In spite of the presence of a limited number of studies investigating the relations between mineralogical and petrographical properties of rocks and their cuttability and diggability, there are a vast number of investigations on the relations between these features and drillability. Many important statistical relationships have been put forward throughout time; however, in these...
Publication: CIM Bulletin
Auteur(s): Y. Özçelik
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: Canadian leadership in a global mining context will depend not only on our entrepreneurship and best practice, but also in sustaining technological innovation. This paper reviews the nature of technological innovation and examines its link to productivity and competitiveness. It then examines how the ability to innovate is strongly influenced by corporate culture and user resistance. This is based on a review of the past research that has been useful in defining the nature and role of...
Publication: CIM Bulletin
Auteur(s): A. Bamber, M. Scoble
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: Measurable improvements in throughput have been documented at Barrick Goldstrike due to increased ore fragmentation through efficient drilling and blasting techniques.
A decrease in throughput at the autoclave, due to increasingly hard ore, was identified in early 2002. A team of individuals from the open pit and process areas worked closely on a continuous improvement initiative to ensure that it would address the needs of both groups, with the target of actually improving throughput in...
Publication: CIM Bulletin
Auteur(s): M. Rantapaa, R. Mckinstry, T. Bolles
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: To improve the economic and environmental performance of underground mining operations, it is common practice to return the metallurgical waste material underground as backfill. This type of backfill is called hydraulic backfill and is used to fill the mined-out areas not exposed to further mining. To provide mechanical support for underground mining, a cemented backfill is normally used. An important parameter for determining the suitability of hydraulic and stabilized backfill is its...
Publication: CIM Bulletin
Auteur(s): J. Petrolito, R.M. Anderson, S.P. Pigdon
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: Hydraulic shovels are widely used for primary production in surface mining operations. The efficiency and costs of mining operations greatly depend on the efficient use of these capital-intensive machines. The shovel-truck mining method is flexible and efficient, however, it can be rendered inefficient from field and operator constraints. Physical and mechanical properties of the formation have a severe impact on a shovel’s efficiency. Variability in material diggability, unstructured mining...
Publication: CIM Bulletin
Auteur(s): S. Frimpong, Y. Hu
Numéro: 1085
Volume: 98
Année: 2005
Texte
Sommaire: Fluctuating metal prices, declining head grade, and increased operational costs are forcing many open pit mining companies to look to their balance sheets for significant cost reductions in order to remain competitive. Maintenance continues to represent a significant proportion of the total operating costs in the mining industry. Compared with the other major cost components of the mining process, very little effort has gone into maintenance optimization. The potential payoff from maintenance...
Publication: CIM Bulletin
Auteur(s): J. Werner, M.W. Lewis
Numéro: 1085
Volume: 98
Année: 2005
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