February 2016

CIM Journal & CIM Metallurgical Quarterly

Excerpts taken from abstracts in CIM Journal, Vol. 7, No. 1.
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Mudrush risk evaluation

J. Jakubec, SRK Consulting (Canada) Inc., Vancouver, British Columbia, Canada; R. Clayton, GHD, Perth, Western Australia; A. R. Guest, AGTCcc (formerly with De Beers), Johannesburg, South Africa

ABSTRACT The potential for mudrushes is a potential hazard that should be evaluated during cave mining studies. Mudrushes are a phenomenon that can have very different origins, but produce the same results: injury, loss of life, damage to property, excess dilution, production delays, or mine closure. Although mudrushes are more common in cave mines than other mines, any mining activity that enables the accumulation of fine particles and water is susceptible to mudflow. This paper describes the process developed by the authors during the past decade to evaluate the risk of mudrushes, specifically in caving and sublevel caving mines.


 

Mine conveyance safety: The evolution and regulation of safety catches

B. Galy and L. Giraud, Institut de recherche Robert-Sauvé en santé et en sécurité du travail, Montréal, Quebec, Canada

ABSTRACT This paper compares Canadian provincial mining safety regulations regarding the use and testing of cage safety catches, including a brief history and evolution. Regulations are similar across provinces, with only slight variations. Currently, the “Ontario-type” safety dog is the most commonly used safety catch in Canada. Performance estimation of the compensation mechanism for different safety-dog shapes and tooth angles show this shape works well and has consistent braking results, but the best efficiency is obtained for initial tooth angles greater than 10°. Miner safety is questionable for lightly loaded cages, an issue that should be addressed technically and legislatively.


 

Effect of diesel oxidation catalysts on nitrogen dioxide production from diesel mining equipment

J. Stachulak, MIRARCO Mining Innovation, Sudbury, Ontario, Canada; M. Gangal, Natural Resources Canada, CanmetMINING, Ottawa, Ontario, Canada; C. Allen, Vale Ontario Operations, Copper Cliff, Ontario, Canada

ABSTRACT Most underground diesel equipment is equipped with diesel oxidization catalysts (DOCs) to reduce carbon monoxide and hydrocarbon emissions. DOCs do not alter nitrogen oxides concentrations but can promote the oxidization of nitric oxide (NO) to the more toxic nitrogen dioxide (NO2). Vale and CanmetMINING have been researching how to reduce worker exposure to diesel emissions by testing mining equipment DOCs. Results indicate a > 77% decrease in carbon monoxide concentration but a 46–315% increase in NO2 concentration for 8-mode test cycles. It is recommended that DOCs that increase NO2 emissions be evaluated regarding their continued use in underground operations.

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Canadian Metallurgical Quarterly cover
Papers in CMQ, Vol. 54, No. 1.
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www.cmq-online.ca

Metallurgical studies with the HIPPO diffractometer at LANSCE

H.M. Reiche, Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM, USA; J.S. Carpenter, Materials Science andTechnology Division, Los Alamos National Laboratory, Los Alamos, NM, USA; F. Stein, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf, Germany; T. Tomida, Steel Research Laboratories, Technical Research & Development Bureau, Nippon Steel & Sumitomo Metal Corporation,1-8 Fuso-cho, Amagasaki, Hyogo, Japan; S.C. Vogel, Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM, USA

Solidification analysis of Al–5 wt-%Cu alloy using in situ neutron diffraction

F. D’Elia, C. Ravindran, Centre for Near-Net-Shape Processing of Materials, Ryerson University, Toronto, ON, Canada; and D. Sediako, R. Donaberger, Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, ON, Canada

Investigation of solidification behaviour of Mg–6Al and Mg–9Al alloys using in situ neutron diffraction

A. Elsayed, Centre for Near-Net-Shape Processing of Materials, Ryerson University, Toronto, ON, Canada; D. Sediako, Canadian Neutron Beam Centre, Chalk River, ON, Canada; and C. Ravindran, Centre for Near-Net-Shape Processing of Materials, Ryerson University, Toronto, ON, Canada

Neutron diffraction investigation of phase compositions in as received and modified Zr–2·5Nb pressure tube materials

A.I. Fluke, R.W.L. Fong, Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, Ontario, Canada; and R. Flacau, Canadian Neutron Beam Centre, National Research Council Canada, Chalk River Laboratories, Chalk River, Ontario, Canada

In situ neutron diffraction analysis of stress-free d-spacing during solution heat treatment of modified 319 Al alloy engine blocks

A. Lombardi, Centre for Near-net-shape Processing of Materials, Ryerson University, Toronto, Ontario, Canada; D. Sediako, Canadian Neutron Beam Centre, National Research Council Canada, Chalk River Laboratories, Chalk River, Ontario, Canada; C. Ravindran, Centre for Near-net-shape Processing of Materials, Ryerson University, Toronto, Ontario, Canada; and R. MacKay, Nemak Canada Corporation, Windsor, Ontario, Canada

Neutron imaging of hydrogen in iron and steel

A. Griesche, E. Dabah, and T. Kannengiesser, BAM Federal Institute for Materials Research and Testing, Department Component Safety, Berlin, Germany

Interdiffusion of Fe and Mg layers during annealing and deuterium absorption

H. Fritzsche, S. Bilodeau, R. Flacau, Canadian Neutron Beam Centre, AECL, Chalk River Laboratories, Chalk River, Ontario, Canada; P. Jain, J. Huot, Institut de Recherche sur l’Hydrogène, Université du Quebec à Trois-Rivière, Québec, Québec, Canada; and W.P. Kalisvaart, D. Mitlin, Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada

In-situ neutron powder diffraction on TiF3 catalysed magnesium for hydrogen storage applications

F.R. Flacau, Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, Ontario, Canada; X. Tan, M. Danaie, Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada; H. Fritzsche, Canadian Neutron Beam Centre, Chalk River Laboratories, Chalk River, Ontario, Canada; and D. Mitlin, Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada


In this issue
     Feature
     Project Profile
    Upfront: Copper
    Technology
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