CIM Journal Vol.4 No.4

CIM Journal, Vol. 4, No. 4, 2013
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Sommaire: The settling, shear strength, and index properties of oil sands fines-sand mixture tailings (FSMT) for a wide range of solids and fines content are investigated. Results indicate that the liquid limit of FSMT obeys a linear mixture law. The fines-water ratio (FWR) governs the permeability of composite tailings (CT) and CT with comparable geotechnical behaviour can be produced from the same initial FWR mixtures. A phosphogypsum (PG) dosage > 900 mg/kg does not improve the dewatering behaviour...
Publication: CIM Journal
Auteur(s): A. R. Sorta, D. C. Sego, and G.W. Wilson
University of Alberta, Department of Civil & Environmental Engineering
Markin/CNRL Natural Resources Engineering Facility
Edmonton, Alberta, Canada
Mots clés: Composite tailings (CT), Fines-sand mixture tailings (FSMT), Oil sands tailings, Atterberg limits, Shear strength, Mature fines tailings (MFT), Sand-fines ratio (SFR), Fines-water ratio (FWR), Phosphogypsum (PG)
Numéro: 4
Volume: 4
Année: 2013
Texte
Sommaire: Solvent extraction is used in many acid leach uranium circuits to upgrade and purify the uranium-bearing solution prior to final product precipitation. A number of strip options are available to recover the uranium from the loaded organic. This paper compares seven of these options on the basis of typical capital and operating costs for the solvent extraction circuit and downstream uranium processing and also considers other related issues. The aim is to provide an objective comparative...
Publication: CIM Journal
Auteur(s): D. van Tonder
AMEC Mining & Metals
Perth, Western Australia

C. Edwards
AMEC Americas Ltd.
Saskatoon, Saskatchewan, Canada
Mots clés: Uranium, Solvent extraction (SX), Solvent extraction stripping, Uranium product precipitation, Nanofiltration (NF)
Numéro: 4
Volume: 4
Année: 2013
Texte
Sommaire: Nickel compounds vary significantly in their toxicological properties, so it is critical that continuing studies to accurately quantify worker exposures consider the processing that accompanies refining nickel-containing materials. The Clydach nickel refinery, which has operated for more than 100 years, was the first nickel-producing facility to show a high risk for lung and nasal-sinus cancers among workers employed since it opened in 1902. Process chemistry and equipment have changed...
Publication: CIM Journal
Auteur(s): K. Lascelles
Vale Europe Ltd., Clydach refinery
Clydach, West Glamorgan, Wales

B. R. Conard
BRConard Consulting, Inc.
Oakville, Ontario, Canada
Mots clés: Nickel refining, Nickel tetracarbonyl, Clydach refinery, Inco, Process history
Numéro: 4
Volume: 4
Année: 2013
Texte
Sommaire: The inevitable uncertainty in modeling spatial variables decreases as more data become available. This reduction depends on the properties of the variable being modeled. Spatially continuous variables show less uncertainty for a given spacing than erratic variables. A geostatistical simulation based approach is developed to quantify the relationship between uncertainty and data spacing. Reference realizations are sampled to condition additional realizations and quantify uncertainty. The...
Publication: CIM Journal
Auteur(s): B. J. Wilde and C. V. Deutsch
University of Alberta, Department of Civil & Environmental Engineering
Markin/CNRL Natural Resources Engineering Facility
Edmonton, Alberta, Canada
Mots clés: Simulation, Sampling, Data spacing, Uncertainty, Data density, Sequential Gaussian simulation, Conditional realizations, Geostatistics
Numéro: 4
Volume: 4
Année: 2013
Texte
Sommaire: An iron ore recovery plant was operated by Inco from 1955 to
1980 near Sudbury, Ontario. As exposures to specific nickel substances have been
associated with adverse respiratory endpoints, it is important to understand
processes giving rise to such substances. 
This manuscript discusses the process and equipment, the propensity for
aerosol formation, and operational procedures used by Inco in roasting a
pyrrhotite concentrate, reducing the nickel in the formed oxide, leaching the...
Publication: CIM Journal
Auteur(s): B. R. Conard</br>
BRConard Consulting, Inc, Oakville, ON</br>
Numéro: 4
Volume: 4
Année: 2013
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