AusIMM Mill Operators' Conference 2012
Abstract
This paper reviews the proportion of energy attributable to comminution within the Australian gold and copper mining sector. The need for this is motivated by inconsistencies in the quoted energy usage data and the lack of a common basis for report...
16-Oct-2012
AusIMM Mill Operators' Conference 2012
Abstract
In a recent publication (Bueno and Lane, 2011) the authors presented the analysis of a consolidated dataset composed by 137 autogenous/semi-autogenous grinding (AG/SAG) mill pilot trials. By comparing the measured data against theoretical specific...
16-Oct-2012
2012 AusIMM Mill Operators conference
Abstract
Since the days of mandatory high cost pilot plant testing in 6 ft × 2 ft SAG mills autogenous grinding/semi-autogenous grinding (AG/SAG), mill specific energy is now calculated by various empirical formulae and pilot testing carried out in small lab...
16-Oct-2012
IMPC 2012
Abstract
The first decade of the 21st century was one of fundamentally changed dynamics for the minerals industry. Following intense globalization commencing in the late 20th century production is now concentrated into large businesses that can compete across geography in diverse commo...
16-Oct-2012
This presentation focuses on a method of calculating AG/SAG mill specific energies using only a combination of Bond Work indices and JK parameters then applying efficiency factors.
06-Oct-2012
Contact Sarah Boucaut
Phone +61 422 257 425
Email This email address is being protected from spambots. You need JavaScript enabled to view it.
Nick Holland Patron of CEEC (458.57 kB)
The Board of CEEC International Ltd (Coalition for Energy Efficient Comminution) is delighted to announce that Mr Nick Hollan...
25-Sep-2012
ABSTRACT The commonly used SAB, SABC and run-of-mine (ROM) ball mill circuits can achieve high throughputs with good operating stability. However, these circuits consume a substantial amount of grinding media, which can have a substantial impact on the OPEX and the ‘carbon footprint’, specifically w...
16-Sep-2012
ABSTRACT
In looking to the future of mineral processing the focus is typically on improved processing units. Basically it is a search for an elusive wonder machine that could revolutionise the economy of mining: the sorter that strips 50% of the ore with only a few % loss of value; the comminution...
16-Sep-2012
The economics of mining is at an inflection point.
For the last decade or so our focus has been on developing mines and bringing them into production.
Demand has outstripped supply, and commodity prices have reflected this. In this world, the winners have
been the ones who moved into production...
30-Aug-2012
2012 CEEC Workshop
In June 2012, CEEC International Ltd, in association with JKTech Ltd, ran a workshop to develop a roadmap for eco-efficient comminution. The workshop was attended by invited senior industry figures from Australia and overseas representing mining companies, engineering companies...
04-Aug-2012
High voltage breakage is a novel comminution method that relies on highly energetic electrical pulses to weaken or fully fragment materials. The potential of this technology to improve liberation and increase the grindability of ores has been demonstrated previously, but the fragmentation process is...
30-Jul-2012
Opening remarks at 2012 CEEC Workshop from Prof M Powell, UQ JKMRC
12-Jun-2012
A presentation given by G Lane Ausenco at the 2012 CEEC Workshop, reviewing comminution from the engineering company perspective.
11-Jun-2012
Contact: Sarah Boucaut
Phone: +61 422 257 425
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
The CEEC Board of Directors is delighted to announce the winner of the 2012 CEEC Medal. Following a thorough evaluation of the nominated papers, the selection committee shortlisted three outstanding papers....
07-Jun-2012
Workshop welcome from Prof Tim Napier-Munn, JKTech Pty Ltd
04-Jun-2012
Contact: Sarah Boucaut
Phone: +61 422 257 425
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
2012 CEEC JKTech Workshop (592.61 kB)
CEEC International, in conjunction with JKTech Ltd, has drawn an “A” list of industry, supply and research practitioner...
31-May-2012
Comminution accounts for approximately 30 to 40% of the energy consumed on an average mine site (DOE, 2007) and somewhere from 4 to 9% of Australia’s total energy consumption (Tromans, 2008). Additionally, if one includes the energy embodied in steel grinding consumables, this may increase comminuti...
28-May-2012
A review of recent concentrator start-ups has been done to examine the methods that were used to design the grinding circuits for these new plants and the results achieved. A number of these start-ups were reported at SAG 2011. Large differences between design tonnage and actual tonnage were reporte...
23-May-2012
ABSTRACT
Newcrest has a strong history of growth over the past 20 years, yielding value from previously marginal ore bodies. We have grown regionally in Asia Pacific through our operations in Australia, Indonesia and Papua New Guinea, and also established a beachhead in West Africa. The company has...
16-May-2012
This, the 8th International Comminution Symposium (Comminution '12) is organised by MEI in consultation with Prof Malcolm Powell and Dr. Aubrey Mainza. It is sponsored by Starkey & Associates, Magotteaux, Maelgwyn Mineral Services, JKTech, Chemco Advance Material, Industrie Bitossi, Xstrata Tech...
30-Apr-2012
Comminution Energy and How to Reduce it. A presentations by Prof Tim Napier-Munn JKMRC (UQ) and CEEC
A pdf of the full presentation can be found here - CEEC Presentation 120328 (2.47 MB)
30-Mar-2012
Abstract
“Classification System Efficiency (CSE)” is a simple, powerful concept which can be used to measure and improve ball mill circuit efficiency. This paper describes six plant case studies which demonstrate the use of CSE to diagnose and/or improve grinding circuit performance, with related i...
16-Feb-2012
The Julius Kruttschnitt semi-autogenous grinding (SAG) mill model was developed by Leung in the 1980s and extensively updated to the variable rates model by Morrell and Morrison in 1996. Since then only minor upgrades have been incorporated in the version distributed in the JKSimMet simulator. A num...
12-Feb-2012
Mill Operators2012
A growing demand within the minerals industry for sustainable development and the introduction of carbon taxes have resulted in a significant focus on improving the energy efficiency of comminution circuits. However, in this drive for improved energy efficiency the role of clas...
06-Feb-2012
The Johannesburg Branch of the SAIMM was privileged to host a presentation by Ms Elizabeth Lewis-Gray on the subject of the Coalition for Energy Efficient Comminution (CEEC), a not-for-profit organisation founded by Ms Lewis-Gray in collaboration with several academic luminaries in the field of part...
04-Feb-2012
Robert McIvor of Metcom Technologies was the 2012 recipient of the Art MacPherson Comminution Award. Presented at the 2012 Canadian Mineral Processing Society meeting in January, Rob was recognised for his numerous papers on topics of comminution and active participation in assisting with...
18-Jan-2012
In November 2011 JKTech Ltd and Gekko Systems Ltd sponsored a Workshop focused on Eco-efficient comminution at Procemin 2011. The workshop was presented by Ms Suzy Lynch-Watson, Principal Comminution specialist at JKTech Ltd, and Nr Nigel Grigg, Sales Manager, Gekko Systems South America.
Well a...
02-Dec-2011
The current mining operations at Newmont Boddington Gold Mine (NBG) commenced in 2008, and commissioning of the processing plant started in the latter half of 2009. Metso Process Technology and Innovation were engaged to assist NBG with commissioning and project ramp-up through the implementation of...
30-Nov-2011
SAG 2011
Newmont Ghana Gold Limited’s Ahafo operation have been working with Metso Process Technology & Innovation (PTI) since early 2009 to increase mill throughput from a combination of controlled blasting practices and optimised primary crusher and grinding circuit conditions. For such Min...
28-Nov-2011
Palabora Mining Copper has a unique ore body composition which unlike other copper ore bodies has three main components in significant proportions; these are copper bearing ore, magnetite and dolerite. The high content of dolerite, a hard barren material, creates a high proportion of pebbles which n...
28-Nov-2011
SAG 2011
The through-put and energy efficiency of an autogenous (AG) grinding mill are adversely affected by variability in rock size and rock competency. This applies to both fully autogenous and semi-autogenous (SAG) grinding circuits.
In this paper we focus on an approach to overcome the pr...
23-Nov-2011
SAG 2011
Compañía Minera Antamina is a polymetallic mining complex that produces copper and zinc concentrates as primary products and molybdenum and lead/bismuth/silver concentrates as by-products. In 2007, Metso Process Technology and Innovation (PTI) was contracted to increase SAG mill throughp...
23-Nov-2011
A research project was conducted at the University of British Columbia (UBC) resulting in the development and evaluation of a novel comminution circuit incorporating autogenous grinding and parallel trains of cone crushers and high-pressure grinding rolls (HPGR). A primary driver for the circuit was...
23-Nov-2011
Despite the claims of energy efficiency and the considerable development that has gone into dramatically extending rolls’ life and facilitating rolls’ change-out, in the six years since the last SAG conference, only a few HPGR operations have entered the realm of mineral processing. Risk barriers...
23-Nov-2011
Barrick Gold Corporation (Barrick) has undertaken innovative methods of evaluating and improving the performance of grinding mills in several of its operations around the world. The results have been positive with some of the mines showing more than 20% net energy improvement leading to more than 43...
22-Nov-2011
Over the past several years, the combination of higher energy and steel costs and the recent commercial deployment of high-pressure grinding rolls (HPGR) technology in hard rock mining have led many multinational mining companies to evaluate the suitability of HPGR technology for their particular co...
05-Nov-2011
The latest newsletter from the AusIMM MetSoc group has been published. It includes Calls for Papers for the 2013 MetPlant meeting, July 15-17 in Perth WA.
PS: Great cover page story! Thanks MetSoc!
04-Nov-2011
Even though most major operating companies in the minerals industry have Board-level endorsed sustainability principles and objectives, design engineers typically have no mechanism that allows them to implement those objectives in their work. In addition, the existing project management systems do n...
28-Oct-2011
Contact: Sarah Boucaut +61 422 257 425
Melbourne. Australia,
Elizabeth Lewis-Gray, Chairman of CEEC (Coalition for Energy Efficient Comminution) announced today the launch of the inaugural CEEC Medal, an annual award intended to recognise and celebrate the contribution of outstanding published...
07-Oct-2011
In 2003, Anglo Platinum, in a joint development with Xstrata Technology, installed the world’s first 10 000 litre IsaMillTM in a concentrate regrind duty at the Western Limb Tailings Re-treatment Plant. The success of that installation was the enabling event for Anglo Platinum to proceed with a subs...
30-Sep-2011
In September 2011, the Australian Department of Resources, Energy and Tourism's (DRET) Energy Efficiciency Opportunites (EEO) division hosted a Mining industry workshop in Perth Australia. The Energy Efficiency Opportunities (EEO) program is a federal program that requires Australia's largest energy...
04-Sep-2011
Elizabeth Lewis-Gray, Chairman of CEEC International Ltd, and CEO of Gekko Systems Ltd presented to the attendees of the Energy Efficiency Opportunity Workshop in Perth Australia in September 2011. This workshop was part of the Energy Efficiency Opportunities program of the Department of Resources E...
04-Sep-2011
One of the main energy efficiency opportunities identified from the majority of mine site energy audits is to optimize the comminution circuit to reduce energy consumption through improved throughput and product size distribution. Typical analysis reviews comminution process efficiency/inefficiency...
30-Aug-2011
Previous papers at Metplant conferences have covered the options for crushing and grinding circuit selection. High Pressure Grinding Rolls (HPGR) may have considerable advantages over autogenous milling circuits but test work and evaluating different grinding circuits must be done to establish which...
30-Aug-2011
Grinding clinker to finished cement consumes more energy than any other comminution process. World production of cement in 2009 was 2840 million tonnes and the energy required for comminution was 40-60 kWh/tonne depending on the clinker characteristics and the fineness of the finished cement. Machin...
28-Aug-2011
The importance of crushers in the mining industry declined with the introduction and resultant dominance of AG and SAG based circuits, but the recent move to consider more energy efficient circuits has caused the industry to re-consider the role of crushers. Different types of comminution equipment...
28-Aug-2011
Due to the high energy consumption of milling, it is desirable to improve the efficiency of this process. One alternative to reduce energy and material consumption while optimising production yield in mill operation is through balanced design and selection of liners. Over-design of liners leads to i...
23-Aug-2011
MetPlant2011
Energetics has been in the business of climate change for more than twenty years. This experience has only served to cement the understanding that decisions taken during design define the environmental and economic performance of any project. The 80-20 rule definitely applies, with 8...
23-Aug-2011
The development of Western Australian magnetite deposits has lead to the design of some of the largest grinding mills and plants in the world. One of the projects demonstrates the efficiency gains possible by developing a simple yet thorough test program for circuit design. By drawing on the experie...
22-Aug-2011
The mining industry is facing some key challenges that provide a compelling case for geometallurgy initiatives. Over the last 30 years, the average grade of Australian ore bodies being mined has halved while the waste removed to access the minerals has more than doubled. In the last eight years, the...
05-Aug-2011