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optimising a sag mill

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Implementation of a SAG Grinding Expert System at ...

Beyond the primary benefit of stabilising and continually optimising the SAG mill operation, the expert system frees up the operators to focus on maintenance issues, as well as upstream and downstream processes. Through direct involvement in the expert system project, the operators have also formed a better understanding of the operation and ...

THE EYES HAVE IT: IMPROVING MILL AVAILABILITY …

optimising benefits of a fixed "security" camera, we designed a MCU which provides a live video feed from inside a running or stationary SAG mill. The first successful installation of a MCU, completed at the Canadian Malartic mine in Quebec, Canada, in 2014, marks the beginning of a new level of insight, information, and safety inside SAG mills.

Optimization of a SAG Mill Energy System: Integrating …

The SAG mill will draw from one of the two stockpiles at will to minimize the energy cost. If one of the stocks is emptied, the ore from the other stockpile is used. Stockpiles are modeled using a first-in first-out approach. In our application, a simplified heuristic is used to feed hard rock during the day and soft rock during the night. ...

optimising a sag mill - schiesser-holzbau.ch

SAG mill operating principles - CGM Grinding Plant . Mill (grinding) - Wikipedia, the free encyclopedia. It is similar in operation to a SAG mill as described below but does not use steel balls in the mill.

optimising a sag mill - rodinnedomyavily.cz

SAG Mill Grinding Circuit Design Semi Autogenous Design FactorsSag Mill Operation ExampleProcess Plant DescriptionSag Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating Strategies The design of large mills has become increasingly more complicated as the size has increased and there is little doubt that without sophisticated design …

(PDF) SAG mill circuit optimisation at Ernest Henry Mining

At 8 – 12 % v/v ball charge volume, and 25 – 35% v/v total charge volume the SAG mill typically draws 10 –. 11 MW. The operating work index for the mill is extremely ore. depe ndent and can ...

MILLING CONTROL & OPTIMISATION - Mintek

By optimising the mill power usage and preventing mill overloads, significantly increases in throughput from 6 to 16% have been achieved. ... Figures 8 and 9 on the right show results from a gold plant's SAG mill achieved with MillStar's Segregated Ore Feed Controller combined with the …

OPTIMISATION AND CONTINUOUS IMPROVEMENT OF …

2007, Process Technology and Innovation (PTI) was contracted to increase SAG mill throughput by integrating and optimising blast fragmentation, crushing and grinding for the harder M4/M4A (CuZn) ores. Following the implementation of recommendations provided by PTI, the SAG mill throughput

Stabilising and optimising a primary closed-loop milling ...

AG/SAG Control and Optimization with PlantStar 2000. In proceedings of an International Conference on Autogenous and Semiautogenous Grinding Technology held September 30 ­ August 3, Vancouver, B. C., Canada, pp. II-282 - II-293. van der Westhuizen, A. P. & Powell, M. S., 2006. Milling Curves as a Tool for Characterising SAG Mill Performance.

Predictive Optimization of SAG Mill Wear Using Rocky ...

In the mining sector, these losses can be particularly large. For example, a trained professional crew requires between 40 and 120 hours to replace the worn liner of a Semi-Autogenous Grinding (SAG) mill with each hour costing between 30,000 to 200,000 …

MINE TO MILL OPTMISATION AT PADDINGTON GOLD …

SAG mill (3.8 MW) and a 15 ft. diameter ball mill (3.5 MW). Cyclone overflow (O/F) is sent downstream for gold leaching. Following sampling, the SAG mill was crash stopped and the total load measured. The SAG mill ball load was also measured following a grind outafter the first survey.

(PDF) Integration and Optimisation of Blasting and ...

(e.g. SAG Power Index, Dro p Weight and SAG Mill Comminut ion tests), which will never be done i n a qu anti ty to stati stica lly repre sent th e ent ire orebody .

Optimisation of Asanko's Obotan SABC circuit to achieve ...

SAG mill Optimisation and increasing throughput at the Phu Kham Copper-Gold Operation – a success story Watch . Optimising the operation of paste thickening at the Yara Siilinjärvi Plant Watch . Modular SAG mill discharge trommel for maintenance flexibility and performance Watch .

SAG Mill Process Control - Grinding & Classification ...

If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere. Underground mines are an example: the hoisting capacity of the mine shaft is the rate-limiting step in the process, and the SAG mill must adapt to ...

optimising a sag mill - petit-patrick.fr

Cortez Gold SAG Mill Optimization KnowledgeScape. We have implemented SAG and ball mill expert control solutions and thickener control in the past at cortez. Below are the results from the SAG mill optimization. SAG mill throughput was increased by 9.3%. It is interesting to note that the expert control of the SAG mill alone yielded a 6% increase.

Performance Characteristics and Optimisation of the ...

by the installation of a 12MW SAG mill with a diameter of 10.97m (36ft). The mill, when built, was the largest SAG mill operating at any existing Australian mine. To aid in commissioning and optimising the mill, the Julius Krutt- schnitt Mineral Research Centre (JKMRC) and plant staff con- ducted extensive surveys of the grinding circuit.

SAG Mill Grinding Circuit Design - 911metallurgist.com

SAG Mill Design and Specification . The Kidston plant was designed to process 7500 tpd fresh ore of average hardness; but to optimise profit during the first two years of operation when softer oxide ore will be treated, the process equipment was …

Optimizing your SAG mill operation - International Mining

Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills. Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm).

Optimising mill circuits for best efficiency impact ...

"Among the new solutions acquired is LoadIQ, for monitoring and optimising the performance of semi-autogenous (SAG) mills," he says. "The SAG mill is a key element of many milling circuits today, usually located between primary crushing and ball milling phases."

Optimizing your SAG Mill | Mining Surplus

Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100mm). The type of mill discharge and the associated problems in both single stage and multi-stage circuits(AG-Ball-Crusher (ABC) and SAG-Ball-Crusher (SABC)), are briefly summarized in the table below.

FREDA REBECCA SAGMILLING CIRCUIT OPTIMIZATION

the SAG mill amounting to 51.2 t/h affecting mill capacity as this took space and limited the capacity for new feed. Using ModSim simulator, incorporation of a 100 micron screen on the cyclone underflow stream was simulated. The main purpose of the screen is to reduce the re circulating load

Finding the right sound in your SAG mill - FL

Finding the right sound in your SAG mill. By analysing the sound and other process parameters, SAGwise™ adjusts mill load and decreases steel-on-steel impact, resulting in less energy consumption and increased production. Operating a SAG mill is a costly …

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Optimizing Performance of SABC Comminution Circuit of …

the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in processing plants outside of China, the power rating of the ball mill should be higher than that of the SAG mill [5]. The pebble crusher had an over-powered configuration. The installed power draw of 630 kW

PARAMETER OPTIMIZATION OF LARGE SAG MILL LINER …

Due to its strong lifting capacity and excellent grinding performance, the trapezoidal liner is widely used in the SAG mill. The structure of the trapezoidal liner is shown in Fig. 1, the main dimensions are: dip angle (tau), length of the top edge (L) and height (h).Dip angle (tau) determines the trajectory of the mediums in the SAG mill, which directly affects the impact speed and ...

(PDF) Maximising SAG mill throughput at Porgera gold …

The mill 5. Implementation motors are rated at 5,500 HP. At the discharge of each SAG mill is a pair of vibrating screens. The screen oversize material from both SAG mills is …

Optimising mill circuits for best efficiency impact

"Among the new solutions acquired is LoadIQ, for monitoring and optimising the performance of SAG mills," he says. "The SAG mill is a key element of many milling circuits today, usually ...

The Effect of the Grinding Charge Trajectory on the ...

SAG Mill 2 Ball Mill Simulations of the Mill Power Effect on the Throughput Conclusions. Introduction ... • Optimising the charge trajectory inside the mill: – Modifying the lifter face angle – Changing the mill's % critical speed – Mill charge level, optimal ball size, etc. 10.

OPTIMISING MILL CIRCUITS FOR BEST EFFICIENCY IMPACT ...

"The SAG mill is a key element of many milling circuits today, usually located between primary crushing and ball milling phases." LoadIQ utilises FL's mill scanner smart sensor technology to accurately measure volumetric filling and ore trajectory in real-time, according to Lineshan Naidoo, FL's regional product line manager ...

What's the Difference Between SAG Mill and Ball Mill ...

The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. …