Resources

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
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 problem of inc...
23-Nov-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 throughput by integr...
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
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
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
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
The following media release was issued on Monday May 9, 2011. For more information, contact This email address is being protected from spambots. You need JavaScript enabled to view it. CEEC Launch Statement Owen Hegarty Patron and Elizabeth Lewis-Gray, Chair, CEEC
09-May-2011
This presentation explores the economic impact of the six key influences on Mining today: Access to Potable Water, Energy shortage, Decreasing Grade, Forced accounting of Carbon, Decreasing Grind Size, Increasing Rock Hardness. Dr Simon Michaux, Ausenco Ltd. This email address is being protected from spambots. You need JavaScript enabled to view it....
05-Feb-2011
A Conjugate Anvil-Hammer Mill (CAHM) has the potential to replace conventional crushers and SAG mills, with their respective conveyors and stockpiles, in a SABC circuit. It may improve comminution circuit efficiency by 100%. CAHM compresses rock in a more efficient way, similar to 19th century stamp...
30-Jan-2011
Efficiency of the comminution operations is traditionally assessed based on operating cost and energy consumption. Traditionally, the lowest operating cost was achieved by multi-stage fully autogenous grinding due to elimination of steel grinding media costs which may represent up to 50% of the grin...
22-Oct-2010
ABSTRACT Minerals processing needs a step change in energy efficiency. While the search for new technology breakthroughs is important, huge gains are still available by better using existing research outcomes. This potential remains untapped due to a combination of organisational ‘silos’, inappro...
01-Oct-2010
The consumption of energy in the grinding process is significant in both the amount used and the cost involved. Both imply that it is important to maximise the throughput for a given grinding task; which in turn implies it is important to maximise mill power draw, which is related to the efficiency...
30-Sep-2010
Comminution is the most energy intensive component of mining and mineral processing and is extremely costly. Relatively simple process flowsheet strategies such as gangue rejection/ preconcentration, selection of coarser grind sizes and the application of newer crushing and grinding technologies wil...
23-Aug-2010
This report contrasts the performance of the Coal industry as a subset of mining, based on a sample of 108 coal mining companies within 201 interviews. The report identifies areas of excellence and those needing improvement.
01-May-2010
This report contrasts the performance of the gold industry as a subset of mining, based on a sample of 19 gold mining companies within 201 interviews. The report identifies areas of excellence and those needing improvement. Detailed analysis of critical actions highlights the need for attention to e...
01-May-2010
During the last few years high-tonnage plants have been designed with comminution circuits using semiautogenous grinding (SAG) mills, high pressure grinding rolls (HPGR), or both, followed by ball mills in different configurations. A strong interest in improved energy efficiency and reduction of car...
23-Feb-2010
An economically appealing method for improving operations is available without the capital expense — get more out of a mill by applying the advanced control capabilities in the existing plant control system.
04-Feb-2010
Although the majority of current steel production is supported by iron ore sourced from high grade haemetite deposits, the long-term growing demand for steel has led to higher raw material prices and opened the way for many new magnetite deposits to also be developed. There is a rich and long histor...
23-Oct-2009
High Pressure Girding rolls have been used in grinding cement clinker and associated materials since 1985 and had found a niche market in diamond ores and in pellet feed preparation. However their entry into hard rock mining was not secured until recently, with the successful commissioning and opera...
09-Oct-2009
The Bond operating work index is in common use for assessment of comminution efficiency. This method was developed for rod and grinding ball mill circuits and is not well suited to AG/SAG mills or the wide range of comminution devices now in common use. Traditional measures of efficiency only con...
23-Sep-2009
Tenth Mill Operators’ Conference, Adelaide, SA, 12 - 14 October 2009 Abstract The design of semi-autogenous grinding (SAG) mill based comminution circuits for the treatment of competent ores, similar to those at Geita and Boddington, involves the same process of sample selection, test work, da...
23-Sep-2009