ويركزمعهد بحوثالعامة لليمينغ الصناعة الثقيلةفي مجال البحوث وتطوير التكنولوجيا المتقدمة والمنتجات الموجهة لصالح العملاء، فضلا عن بناءالقدرة التنافسية الجوهريةليجعل يمينغالصناعة الثقيلةرائدةفي هذه الصناعة.من خلال توفيرنتائج البحوثالأساسية، ويدعم المعهديمينغالصناعة الثقيلةالتكنولوجيا والمنتجات لتكون أعلىمنهافي العالمالقائمة.
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Control SAG Mill sound detection - Grinding ...
2021-5-4 Sound control of a SAG mill is a subject that needs to be talked about more. I have been working on mill control, using microphones, for a good part of my career and I can say with much confidence that it works. Where I work now, Minera San Cristobal in Bolivia, we use sound control on both the SAG and Ball Mills.
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Listening to SAG Mill Noise Pays Off for Pueblo Viejo
2020-4-8 One of these initiatives was to install an acoustic monitoring system on the SAG mill. After SmartEar was installed in January 2013, data from the system was used to optimize the mill’s performance by minimizing any interval in which the mill is either running too quietly or too loudly.
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SAG Mill Control: It Shouldn’t be that Hard E MJ
2020-4-8 While there is no generic control strategy for SAG milling there is a considerable amount of reusable engineering. In contrast to an expert or black box system, the control loop approach was built using standard blocks, connected as shown. This control strategy has been in operation since January 2007 and controls the mill with minimal operator involvement over 95% of the time.
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SAG Mill Process Control - Grinding Classification ...
2021-4-29 Therefore, having a speed range available allows this tuning of the SAG mill. That does not mean that the preference is speed control over feed rate control. Each ore is different and each plant is different. As equipment designers, we have to provide each of the features that the operators could use to optimize their process.
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Grinding Mill Control - Grinding Classification
2021-5-9 The acoustics of the mill charge motion is measured by a device mounted adjacent to the SAG Mill shell. The resulting signal is transmitted to the acoustic indicating controller which, in turn, sends a remote set point to the SAG mill speed controller.
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Evolution of SAG Mill Process Control at the Xstrata ...
2020-4-23 decided to make SAG control one of its priorities in order to further increase throughput and improve stability. The original primary mill control logic delivered by the Optimisation Project in 2005 consisted of a simple PID loop controlling the mill charge (bearing pressure) through feed rate changes.
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SAG Mill Optimization using Model Predictive Control
the control of processes that exhibit an integrating type response in combination with transport delays or variable interaction. This type of response is particularly difficult to control, and it is common in mineral processing for many different processes including level control of flotation cells and crushers, and SAG mill weight control.
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Expert mill control at AngloGold Ashanti
2009-8-26 control are discussed. The ROM SAG mill circuit—a brief description The typical ROM SAG mill circuit is depicted in Figure 1. The circuit is usually closed with either a screen or, more commonly, a cyclone for product size classification. The focus of control can be divided into two parts, viz. the
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Grinding Mill Control Types - Grinding Classification ...
2021-2-4 The resulting signal is transmitted to the acoustic indicating controller which, in turn, sends a remote set point to the SAG mill speed controller. The speed of the SAG mill is then automatically adjusted (within set limits) to maintain the required acoustic level.
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(PDF) SAG mill circuit optimisation at Ernest Henry
SAG mill Load cells, power draw meter, sound monitoring. All process water additions Flowmeters. ... 95% of SAG mill control actions are based on the relationship between .
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Optimise SAG mill capacity and avoid ... - FLSmidth
The one sound operators do not want to hear is the sound of the mills standing still. A gold-processing plant, I visited recently valued their SAG mill downtime at US$ 130,000 per hour, so extending the life and availability of mill liners is crucial to them. The reduced damage improves the mills’ availability and minimises the downtime.
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Electronic ear in SAG mill Automation Control ...
2004-8-25 This application of electronic ear is used to control the mass of mineral that is possible to mill. It's usually used in cement industry. This control loop is inverted; so if the sound decressed, the feed of the mill has to decressed. Also this measure is used to generate an alarm that cut the feed of the mill to avoid excess of mineral.
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Comprehensive Process Control Journey of Oyu Tolgoi
2020-2-19 Quest sound level meter consist of 8 microphones for each mill and output of this system is the sound level intensity. The hybrid system between hydrophone and Metso Audiomill was chosen as the solution and ... • On Q-4 2015, SAG mill Expert Control has successfully commissioned.
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Unlock SAG mill capacity with process control
The instrumentation installed on a SAG mill is integral to control. For example, the mill load and noise sensors are instruments that provide essential information for an optimized SAG mill operation. Insufficient understanding of the ore characteristics and feed composition can result in an ineffective SAG mill
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The Benefits of Using SmartEar™at Pueblo Viejo -
2021-5-8 Pueblo Viejo installed a Metso SmartEar™ to monitor the acoustic emissions of their SAG mill in January 2013. This system has been installed on many mills around the world and is specifically designed for optimising SAG mill control. One system output is the impact counter which measures steel-on-steel impacts on the mill shell.
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1 x Metso SAG Mill Siemens Motor
2019-2-25 1 x Metso SAG Mill Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill Metso SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7.5-8.0 RPM Mill Speed 7.56-10.08 RPM Liners Excluded Mill Drive Motor Type Wrap Around (included) Mill Drive Motor Size 19,400 KW (26,016 hp) Variable Speed Drive Yes Max.
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The Science of Comminution
2010-3-24 - SAG Mill Load Control 28 - Mill Power Indication 28 - Cyclone Pressure 28 - SAG Mill Speed Control 28 - Pebble Crusher – Steel Removal Logic 28 - Sound Pattern Indication 28 - Supervisory Control 29 - High Level Control 29 GRINDING MILLS 30 - Calculating Motor Mill Size 31 • Determining Motor Horsepower Requirement 31 ...
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Barrick Digital team applies MillSlicer tech to SAG mill ...
2018-2-21 The SAG mill at the site grinds the gold ore which is then sent to the autoclave for further processing. The impact of steel balls against ore particles is an efficient grinding method, but it can also wear the liner that protects the cylinder.
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X ] » creativity.engineered - I N N O V A T I O N [ X
For any particular mill filling, there is a mill speed which will maintain the setpoint sound level (and therefore grinding conditions). Advanced Control of Ball Mill Grinding Circuits The process objective of the ball mill circuit control scheme is to maximise the grinding effort applied to solids delivered by the SAG mill.
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Comprehensive Process Control Journey of Oyu Tolgoi
2020-2-19 Quest sound level meter consist of 8 microphones for each mill and output of this system is the sound level intensity. The hybrid system between hydrophone and Metso Audiomill was chosen as the solution and ... • On Q-4 2015, SAG mill Expert Control has successfully commissioned.
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Optimise SAG mill capacity and avoid ... - FLSmidth
The one sound operators do not want to hear is the sound of the mills standing still. A gold-processing plant, I visited recently valued their SAG mill downtime at US$ 130,000 per hour, so extending the life and availability of mill liners is crucial to them. The reduced damage improves the mills’ availability and minimises the downtime.
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The impactmeter, a new instrument for monitoring
2000-8-1 A typical signal describing an impact in the SAG mill sound. (relative magnitudes). 4. CONCLUSIONS ACKNO~DGEMENTS The application of the Impactmeter system improves availability and productivity of the SAG Mill. When the lifter profile is improperly designed, or when the mill speed is chosen too high at variable speed mills, the shell liners ...
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Dynamic modeling and simulation of a SAG mill for
2018-5-1 The modeling and simulation of semiautogenous (SAG) mills have been widely used in the design and optimization of mill performance in terms of its power draw, processing capacity and product size distribution. However, these models are solved under steady approximation and do not provide any information on mill charge distribution in real time.
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Multivariable Model Predictive Control of a Simulated
2009-1-1 Keywords: Dynamic modeling, Predictive control, SAG mill, Simulation 1. INTRODUCTION Comminution is the process of reducing the size of the ore, so that it can be further processed to extract the valuable minerals. Conventional Ball Mill and SAG Mill grinding are the most used comminution equipments in the cooper industry.
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The Science of Comminution
2010-3-24 - SAG Mill Load Control 28 - Mill Power Indication 28 - Cyclone Pressure 28 - SAG Mill Speed Control 28 - Pebble Crusher – Steel Removal Logic 28 - Sound Pattern Indication 28 - Supervisory Control 29 - High Level Control 29 GRINDING MILLS 30 - Calculating Motor Mill Size 31 • Determining Motor Horsepower Requirement 31 ...
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1 x Metso SAG Mill Siemens Motor
2019-2-25 1 x Metso SAG Mill Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill Metso SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7.5-8.0 RPM Mill Speed 7.56-10.08 RPM Liners Excluded Mill Drive Motor Type Wrap Around (included) Mill Drive Motor Size 19,400 KW (26,016 hp) Variable Speed Drive Yes Max.
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Continuous Improvement in SAG mill liner design
2021-3-27 An industrial case study is presented of a 38" diameter SAG mill, which was experiencing challenges associated to liner breakage and low efficiency with the old liner design. Through a modification of the liner design, simulations demonstrated the potential benefit associated to reduction in ultraprojection and improvement in mill capacity.
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Barrick Digital team applies MillSlicer tech to SAG mill ...
2018-2-21 The SAG mill at the site grinds the gold ore which is then sent to the autoclave for further processing. The impact of steel balls against ore particles is an efficient grinding method, but it can also wear the liner that protects the cylinder.
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AMIT 129: Lesson 10 Mine Ground Control – Mining
Methods in Ground Control Testing back and side for loose rock. The method of removing loose rock from the back or side is called barring down or scaling down. A metal pry bar called a scaling bar is used. Loose rock gives off a hollow or dull sound when hit with a hammer or scaling bar, compared to a solid ring of a sound back.
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