SMI-JKMRC Seminar: Understanding ore breakage variability - where averages do NOT work. Part I: Experimental Development
Farhad Faramarzi, PhD Candidate, JKMRC, Sustainable Minerals Institute, UQ
The most common comminution testing methods and the associated analytical procedures provide average values and do not capture the intrinsic variability in breakage behavior of ore particles. Therefore, plant designs and process performance predictions use only average values, hence the inherent variability that exists in an ore domain translates into variation in process performance.
The aim of this work is to highlight the impact of intrinsic breakage variability of ores on plant design and process performance. The presentation will focus on the drawbacks of using the average approach to impact comminution testing and plant design. To clearly delineate breakage behaviour of each broken particle, a novel experimental technique using the JK Drop Weight Tester (JKDWT) has been developed by which actual comminution energy per particle and breakagen intensities were measured directly. The highlights of Farhad’s presentation are as follows:
- Average-Based testing methods are not sufficient.
- Development of breakage testing methods to capture breakage variability is important.
- A methodology is developed at JKMRC and research is ongoing.
Bio
Farhad Faramarzi is educated in Iran and holds BEng (2009) and MEng (2011) in mining engineering. He is specialised in optimisation of drilling & blasting operations in open-pit mines and Rock Engineering Systems (RES). After graduation, he started working as a superintendent drill & blast engineer. This position provided him the valuable opportunity to design, manage and analyse more than 150 blasts in open pit mines. Being interested in research, he moved to Australia in 2015 to pursue a PhD at JKMRC and became a Graduate member of AusIMM. Farhad Faramarzi research focus is understanding ore breakage behaviour in the context of weathering and development of new techniques in ore breakage characterisation to capture and quantify intrinsic rock breakage variabilities.
About SMI-JKMRC Seminars
2017 Seminar Series
1 July | Reducing Energy Consumption in Comminution by doing much less of it. Dr Rob Morrison, JKMRC |
7 August | A New Way of Representing A and B Parameters from JK Drop Weight and SMC Tests: The “SCSE” Vas Matei, JKTech |
14 August | TBA Dr Tim Kastelle, UQ |
21 August | Outotec Brownfield Solutions – Solving customer problems Sherwin Morgan, Outotec |
28 August | From Thesis to Thesis Dr David Moore |
4 September | Value Seeking: Is the definition of productivity too narrow to protect and grow value? Dr Chris Moran, SMI |
11 September | Iron Ore final grinding by HPGR and Air Classification Evert Lessing, Weir Minerals |
18 September | Developments in Geometallurgy and Efficient Mining – Metso Process Technology and Innovation Dr Alex Jankovic, Metso PTI |
25 September | Optimising SAG milling through Power and Trajectory Modelling. A case study. Paul Toor, Metso Minerals |
2 October | Identification of Processing Improvements at Bulghah and Sukhaybarat Operations Percy Madrid, JKTech |
9 October | Next Generation Mine to Concentrator Dr Sarma Kancibotla, JKMRC |
16 October | Commissioning and Ramp Up of the Albion Process at GPM Gold Paul Voigt, Glencore Technology |
23 October |
TBA Jeff Dawes, Komatsu Chile |
30 October | Management of Tailings Disposal on Land Arjuna Dissanayaka, Knight Piesold |