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Browsing by Author "Ghorbani, Yousef"

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Investigation and modelling of the progression of zinc leaching from large sphalerite ore particles

Author: Ghorbani, Yousef ; Petersen, Jochen ; Becker, Megan ; Mainza, Aubrey Njema ; Franzidis,Jean-Paul Date: Jan 2013 X-ray Computed Tomography (CT) was used to follow the progression of Zn leaching in a number of individual sphalerite ore particles, which were subjected to a long-term simulated heap bioleaching environment. The ore was prepared by two ... Read more
Investigation of particles with high crack density produced by HPGR and its effect on the redistribution of the particle size fraction in heaps

Author: Ghorbani, Yousef ; Petersen, J ; Becker, Megan ; Mainza, Aubrey Njema ; Franzidis, Jean-Paul ; Kalala, JT Date: 2013 The application of comminution technology such as the High-pressure grinding rolls (HPGR), which is able to generate a high density of cracks in the ore particles, is favourable for leaching processes. Extraction of metallic values by the ... Read more c b
Investigation of the effect of mineralogy as rate-limiting factors in large particle leaching

Author: Ghorbani, Yousef ; Becker, Megan ; Petersen, J ; Franzidis, Jean-Paul Date: Oct 2013 Although heap leaching is by now well established in the mining industry, the process remains limited by low recoveries with different rate-limiting factors that are not clearly understood. In this study, three large particle size classes ... Read more c b
Large particle effects in chemical/biochemical heap leach processes – A review

Author: Ghorbani, Yousef ; Becker, Megan ; Mainza, Aubrey ; Franzidis, Jean-Paul ; Petersen, Jochen Date: 2011 The application of heap leach technology to recovery of economically important metals, notably copper, gold, silver, and uranium, is wide-spread in the mining industry. Unique to heap leaching is the relatively coarse particle size, typically ... Read more
On the progression of leaching from large particles in heaps

Author: Ghorbani, Yousef Date: 2012 Although heap leaching is by now a well-established technology choice in the mining industry, the process remains limited by low recoveries and long extraction times. It is becoming increasingly clear that the successful application of heap ... Read more
Use of X-ray computed tomography to investigate crack distribution and mineral dissemination in sphalerite ore particles

Author: Ghorbani, Yousef ; Becker, Megan ; Petersen, Jochen ; Morar, Sameer H ; Mainza, Aubrey ; Franzidis, J-P Date: 2011 As the trends in mineral processing move towards the beneficiation of finer grained and more complex ore bodies, so too do the methods needed to understand and model these processes. During the heap leaching of low-grade ore bodies, the crack ... Read more c b n d