Equipment lifespan optimization

CIM Journal, Vol. 3, No. 4, 2012
L. Chunpongtong MineRP Canada Limited, Calgary, AB
Abstract
 Compared to equipment used in hard rock mines, the lifespan of equipment
deployed in oil sands operations tends to be shortened due to the abrasive
nature of the material and soft ground conditions in which it operates. One of
the challenges of oil sands mine planning is to determine the most
cost-effective replacement time for aging equipment. For cost engineers dealing
with aging equipment, the options become an economic trade-off between taking
the chance of higher frame failure or buying new equipment. Therefore, the
ultimate question is: “When is the best time to replace the equipment?”
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Publication: CIM Journal
Issue: 4
Volume: 3
Year: 2012
Text
Summary: Anisotropic minerals
are important constituents of many ores. This group includes both valuable
minerals (e.g., molybdenite in Cu-Mo ores) as well as gangue minerals (e.g.,
talc in platinumbearing sulphide ores in South Africa, graphite in Cu-Ni
sulphide ores in Canada, chrysotile in Ni sulphide ores in Australia, and clay
minerals in all types of ores). Aqueous suspensions of anisotropic minerals
exhibit different properties than suspensions of isotropic minerals. The
presence of anisotropic...
Publication: CIM Journal
Author(s): J. S. Laskowski
Norman B. Keevil Institute of Mining, University of British Columbia, Vancouver, BC
Issue: 4
Volume: 3
Year: 2012
Text
Summary:  In this study, the effect of using conventional crushing and
high-pressure grinding rolls (HPGR) in combination with dry or wet milling was
investigated using a base-metal sulphide (BMS) sphalerite and a platinum group
mineral (PGM) ore to determine how these processes affect the flotation
performance. In sphalerite, irrespective of the crushing procedure (HPGR or
conventional), dry milling resulted in the highest grades and recoveries of
zinc, whereas in PGMs, similar treatment...
Publication: CIM Journal
Author(s): N. A. Chapman, N. J. Shackleton, and V. Malysiak
Anglo Research, Crown Mines, South Africa

C. T. O’Connor
Centre for Minerals Research, University of Cape Town, Rondebosch, South Africa
Issue: 4
Volume: 3
Year: 2012
Text
Summary:  Bench stability in mines is an important element of pit design. There is
no consensus on which criteria to use to evaluate the bench design reliability.
When designing the pits, bench design reliability is analyzed according to one
or two criteria. The objective of this paper is to analyze the bench design for
the Tiriganiaq pit, part of the Meliadine mine project, with regards to the
reliability criteria found in the literature and in practice. The paper presents
the similarities and...
Publication: CIM Journal
Author(s): M. Grenon, J. Kabuya Mukendi
Département de génie des mines, de la métallurgie et des matériaux, Université Laval, Québec, QC

J. Hadjigeorgiou
Lassonde Institute of Mining, University of Toronto, Toronto, ON

P. Matte, F. Brunet, D. LeBlanc
M
Issue: 4
Volume: 3
Year: 2012
Text
Summary: Occupational epidemiology of the nickel-producing industry has found that
inhalation exposures to certain nickel-containing substances are linked to
respiratory cancers and to nonmalignant respiratory endpoints. Establishing such
a linkage, however, is complicated by the fact that some diseases occur long
after exposure to a causal agent (i.e., some diseases have long latencies).
Furthermore, most chemical agents (especially nickel substances) vary
significantly in their toxicological...
Publication: CIM Journal
Author(s): B. R. Conard
BRConard Consulting Inc., Oakville, ON
Issue: 4
Volume: 3
Year: 2012
Text
Summary: New technology projects,
particularly those involving first-of-a-kind metallurgical facilities, have poor
track records achieving overall financial targets. Associated risks include slow
start-up, slow ramp-up, and failure to achieve design performance (quality or
throughput), which affect cash flow and net present value (NPV) or internal rate
of return (IRR). Applied discount rates often lack adequate provision for
technological risk. In this paper, the authors will examine project risk and...
Publication: CIM Journal
Author(s): M. Kennedy
Norwegian University of Science and Technology, Trondheim, Norway

C. Harris
Accenture, Toronto, ON

A. MacRae
MacRae Technologies, Inc., Hayward, CA
Issue: 4
Volume: 3
Year: 2012
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