Esen Mining Consulting has an arrangement with CMD Consulting Pty Ltd to use the contracted services of Dr Mike Daniel who is an independent grinding circuit consultant based in Australia Mike has extensive experience in the design and application of High Pressure Grinding Rolls HPGR technology as well as process audits modelling and optimisation of comminution circuits
A comparison of SAG mill power models Alex Doll Alex G Doll Consulting Ltd Canada ABSTRACT SAG Mill power draw models are used in mill design and grinding circuit modelling to predict how much power will be consumed by a particular mill geometry and operating configuration
The authors conclude that “the current scepticism within financial circles of the ability of consulting and engineering firms to predict SAG mill throughput as evinced by Scotia Bank articles referred to in the paper should not be considered as a lack of sophistication of the available testing methods or the maturity of SAG milling technology
Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336 – 268 Lakeshore Rd E Oakville Ontario L6J 7S4
SAG mill 36 ft dual drive SAG mill 40 ft Metso QdX4TM Mill Drive Foundation deformation CMD test bench Condition monitoring Foundation Standard design • Standard gear driven foundation loading • Seismic loading easily calculated • No static or dynamic modal analysis required •
Following a successful commissioning and startup we believe that two grinding lines at Las Bambas Perú each consisting of one SAG Mill and one Ball Mill this mill combination is uniquely specific to Las Bambas ore types are operating at design throughput of close to 140000 tpd and within the range predicted by DJB from a managed multisample geometallurgical testing program ie no
SAG Mill process control classically maintains the SAG mill volumetric filling within a set operating range Typically a SAG mill weight measurement by either bearing pressure transducers or load cells is used as an inferred measurement of volumetric filling To maintain volumetric filling within a set operating range the SAG weight setpoint
CMD Consulting compares Rocky DEM calculations for power draw with those predicted by Morrell’s C model and finds Rocky DEM to be extremely accurate – an important finding when choosing to use particle flow simulations to validate mill designs
AG SAG BALL Mills In any mining operation grinding ore is an essential operation of the process which is performed by Autogenous SemiAutogenous and Ball mills with power rating of up to 30MW CMD offers various kinds of mechanical power transmission systems for those mills
Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336 – 268 Lakeshore Rd E Oakville Ontario L6J 7S4
SAG Mill process control classically maintains the SAG mill volumetric filling within a set operating range Typically a SAG mill weight measurement by either bearing pressure transducers or load cells is used as an inferred measurement of volumetric filling To maintain volumetric filling within a set operating range the SAG weight setpoint
Following a successful commissioning and startup we believe that two grinding lines at Las Bambas Perú each consisting of one SAG Mill and one Ball Mill this mill combination is uniquely specific to Las Bambas ore types are operating at design throughput of close to 140000 tpd and within the range predicted by DJB from a managed multisample geometallurgical testing program ie no
PAPER 3 Comparison of Ore Hardness Measurements for Grinding Mill Design for the Tenke Project John Starkey1 Principal Consulting Engineer David Meadows2 Manager Mineral Processing Development 1 Starkey Associates 344115 George St Oakville ON L6J 0A2
The consultancy established in 1983 has a reputation for the delivery of high quality studies and practical engineered solutions in the areas of comminution beneficiation and hydrometallurgy With a primary focus on grinding applications OMC was instrumental in the wide acceptance of SAG milling to the Australian mining industry
ABB’s GMD is the most powerful mill drive system in the market to power semiautogenous SAG ball and autogenous AG mills This ’workhorse’ for grinding operations combines a robust servicefriendly and fit for purpose design to provide highest throughput reliability
Sedat was part of the consulting team and they did a comprehensive drillblast audit plant survey as well as simulated the entire operations using their models The result was remarkable approximately 15 SAG mill throughput increase He is a great consultant who understands our needs focusses on the results and delivers ontime
Looking at this chart any time a mill uses a ball larger than 3 12″ diameter say the mill should be lined with high chrome steel liners In using steel or rubber liners you must carefully choose the best configuration for your application Insure you have the correct liner spacing and lift for your SAG or Ball Mill Rubber Liner Wear Rate
mill operators conference hobart 2012 • single stage ball mills treating hard ore are inefficient • for example the 22ft dia x 405 ft lg xstrata zinc mill at mt isa • the bond laboratory rmwi and bmwi values are recorded at 16kwht • the operating work index is currently in the region of 21kwht to 25kwht • in other words • over 30 higher than the bond work indices
The dry selfgrinding machinesemiselfgrinding machine is a kind of equipment which uses the ore itself to crush and grind The barrel has larger diameter shorter length and larger feeding size which can replace medium crushing fine crushing and coarse crushing Production Process Generally the amount of steel balls added from the mill is 23X of the effective volume of the mill and
SAG mill optimisation using powerbased simulations Author Dr Rajiv Chandramohan Robert Braun Greg Lane Redefining whats possible and delivering valueadding consulting studies project delivery and asset operations and maintenance solutions to the Minerals Metals Oil Gas and Industrial sectors globally
FMC is a leading development consultancy bringing innovative responsive and integrated water sanitation and hygiene WASH solutions for pastoralist communities
