August 2016

CIM Journal & Canadian Metallurgical Quarterly

Excerpts taken from abstracts in CIM Journal, Vol. 6, No. 3.
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High-resolution downhole data: A guide to front-end process-plant design

R. Howard, Case Consulting Pty Ltd., Whangarei, New Zealand

ABSTRACT In projects involving resource development and plant optimization, the use of in-mine geophysics can deliver considerable benefit. The value proposition lies in using very high resolution downhole measurements to model process-plant outcomes. The calibration procedure used to convert in-situ physical properties into process engineering parameters is illustrated using two iron ore projects. Data correction was related either to orebody structure or mineral formation. The deliverable from this approach is a series of high-definition sections indicating the variability of ore delivered to a frontend separation plant and parameters for mine scheduling and stockpile design needed for maximum product yield.


Behaviour and benefits of arsenic in copper electrorefining

M.S. Moats, Materials Research Center, Missouri University of Science and Technology, Rolla, Missouri, USA; N. Aslin and A. Pranowo, Glencore Technology, Townsville, Queensland, Australia; and G.R.F. Alvear F., Glencore Technology, Brisbane, Australia

ABSTRACT The toxicity of arsenic is well known and documented; however, the presence of arsenic in copper electrorefining anodes and electrolytes is critically necessary to produce high-quality cathode. Arsenic as well as antimony and bismuth concentrations vary relative to their concentration in the anode copper received from the smelter. The behaviour and benefits of arsenic in copper electrorefining and the detrimental effects of antimony and bismuth on cathode quality and tankhouse performance are discussed. This will include the minimization and mitigation of problems associated with arsenic, antimony, and bismuth—including cathode contamination, floating slimes, scaling, and anode passivation.


Investigation of hydraulic fracture growth through weak discontinuities with active ultrasound monitoring

A.P. Bunger, Department of Civil and Environmental Engineering and Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, USA; J. Kear, CSIRO Energy, Melbourne, Australia; R.G. Jeffrey, SCT Operations, Wollongong, Australia; R. Prioul, Schlumberger-Doll Research, Cambridge, Massachusetts, USA; and D. Chuprakov, Schlumberger Moscow Research, Moscow, Russia

ABSTRACT Hydraulic fracture (HF) growth through naturally fractured rocks challenges the development of accurate predictive HF models. The authors present laboratory experiments differentiating behaviours associated with orthogonal and oblique intersections between HFs and natural fractures (NFs). HFs were created in sandstone and crystalline (gabbro) rock specimens, impinging orthogonally or obliquely on an unbonded machined frictional interface. Ultrasound monitoring was used to observe the rate of propagation through the interface. A contrast was observed between direct and offset crossing for orthogonal and oblique intersection, respectively. The stresses required to promote crossing depended on the intersection angle between HFs and NFs.


Vanadium purification: A review

M.R. Tavakoli, Kemetco Research Inc., Richmond, British Columbia, Canada; and D.B. Dreisinger, Department of Materials Engineering, University of British Columbia, Vancouver, British Columbia, Canada

ABSTRACT Vanadium has been produced from a variety of sources. This metal is known to make aqueous solutions of complex speciation as a function of vanadium concentration and pH. Considering the method of leaching, the impurities in the pregnant leach solution, and the planned vanadium product, different extractants and flowsheets can be applied for solution purification. This paper reviews the purification of vanadium leaching solution using organophosphorus, solvating, and amine extractants. This review focuses on vanadium separation from iron, molybdenum, and uranium, which are often present in vanadium resources such as primary ores, fly ashes, and spent catalysts.


Rapid development in Canada: Myth or reality? An underground mining contractor’s perspective

P. Healy, P. Hickey, and G. Hubert, J.S. Redpath Limited, North Bay, Ontario, Canada

ABSTRACT VJ. S. Redpath Limited, an underground contractor with a worldwide presence, has implemented innovative techniques in various projects in Canada to shorten the development cycle. Conventional methods currently used for installing primary ground support are compared with the Australian technique of bolting and meshing with jumbos equipped with twin telescopic booms, in-cycle shotcreting, and the use of two jumbos and two scissor bolters set up side by side in wide headings. Recommendations and lessons learned are presented with the aim of providing realistic expectations with regard to development advance rates in a mining environment.


Screening peptide-ore interactions with a phage display library for bioflotation application

K. Tremblay-Bouliane, D. Tremblay, S. Moineau, B. Gaillet, and A. Garnier, Université Laval, Québec City, Quebec, Canada; and C. Olsen, COREM, Québec City, Quebec, Canada

ABSTRACT A heptapeptide library displayed on M13 bacteriophages (phages) was screened to identify peptide sequences able to selectively bind to gold, chalcopyrite, sphalerite, pyrite, and silica ores, and to evaluate phage potential as bioflotation reagents. Many peptide sequences were isolated through biopanning and differed from known sequences. Adsorption isotherms were determined and a receptor/ligand interaction model was identified and used to compare affinity of peptide sequences toward ores. Some phage sequences have slightly lower affinity to sphalerite than other sulphides. Adsorption was higher on sulphides than on silica. Induction time measurements suggested filamentous M13 phages lower hydrophobicity of the ore surface.


Hands-on teaching of applied rock mechanics

D. Beneteau and D. Milne, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; and Y. Potvin, Australian Centre for Geomechanics, Nedlands, Australia

ABSTRACT Advances in technology provide educators with valuable tools to enhance their teaching and efficiently deliver content to larger audiences. University educators are often encouraged to become more “research intensive” and to increase student enrollment. Faced with these pressures, there is a tendency to use technology to improve teaching efficiencies rather than to enhance existing teaching approaches. Practical learning in applied engineering courses would suffer greatly if hands-on experience is not emphasized. This paper discusses advantages and limitations of new technologies applied to learning, and methods to incorporate more hands-on experiential teaching techniques to applied mining engineering courses.

Canadian Metallurgical Quarterly cover
Excerpts taken from abstracts in CMQ, Vol. 54, No. 2.
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From extractive metallurgy to materials engineering: personal teaching and research perspective
G.P. Demopoulos, Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada

Influence of minor Zr and Ti on microstructures and properties of Al–8·6Zn–2·5Mg–2·2Cu alloys
CH.F. Xu, State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China and Department of Mechanical Engineering, Guilin University of Aerospace Technology, Guilin, China; K.H. Chen, H.C. Fang, J. Xu, W. Liu, S.Y. Chen, and L.P. Huang, State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China

Effect of heating mode and electrochemical response on austenitic and ferritic stainless steels
A. Raja Annamalai, Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, India and Manufacturing Division, VIT University, Vellore, Tamil Nadu, India; A. Upadhyaya, Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, India; and D.K. Agrawal, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania,

Modelling HF generation in aluminium reduction cell
Y.J. Yang, School of Materials and Metallurgy, Northeastern University, Shenyang, China and Light Metals Research Centre, University of Auckland, Auckland, New Zealand; M. Hyland, Light Metals Research Centre, University of Auckland, Auckland, New Zealand; Z.W. Wang, School of Materials and Metallurgy, Northeastern University, Shenyang, China; and C. Seal, Light Metals Research Centre, University of Auckland, Auckland, New Zealand

Effect of magnesium addition on evolution of inclusions in Mn–Si–Al deoxidised molten steels
T.S. Zhang, Y. Min, and M.F. Jiang, Institute of Ferrous Metallurgy, Northeastern University, Shenyang, China

Study on electrical conductivities of CaO–SiO2–Al2O3 slags
J.-H. Liu, G.-H. Zhang, and K.-C. Chou, State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, China and School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, China

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