The advanced process control team, formed by people from Informatics, Automation and Operations of CMDIC have assumed the challenge of generating the transition from a manual SAG Mill 1011 ....
ISBN 978-1-61782-868-3 IFAC Workshop on Automation in Mining, Mineral and Metal Industry 2009 Vina del Mar, Chile 14-16 October 2009 Editor...
adequately control the mill resulting in poor stability, frequent operator interventions and less than optimum performance This paper describes the successful integration of advanced field systems such as mill feed image analysis Wipfrag and crusher gap controller ASRi , into a multi-variable fuzzy logic SAG mill controller...
In this case, the primary grinding stage in a concentrator comprises a rod mill in open circuit and a semi-autogeneous mill in closed, circuit with a hydrocyclone classifier All the measurements have computer interfaces and all the control circuits have been implemented by the process control computer The crushed ore feed to the rod mill is measured by a belt-weigher and controlled by a belt ....
Advanced process control for grinding circuits White paper 3 Introduction Depending on the ore characteristics and the targeted plant capacity, the design of the grinding circuit may vary significantly Typically, the circuit consists of several mills rod, ball, SAG, AG in series and/or parallel with a number of classifiers and...
This work has illustrated this fact by designing a modular optimizing control strategy for a SAG mill The Multivariable Predictive Controller proposed in this paper can set the SAG Mill operation in the optimal zone maximizing profits without restriction violation...
Mill grinding Wikipedia SAG is an acronym for SemiAutogenous Grinding SAG mills are autogenous mills but use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21 The largest SAG mill is 42 128m in diameter, powered by a 28 MW 38,000 HP sag mill optimum charge...
Oct 01, 2014 0183 32 24 Multivariable predictive control In the present work, a three-input-three-output scheme of control was performed The total water feed to the mill the feed water flow rate was added to the dilution water flow rate, so they could be specified separately, but for the SAG mill model, the total water content was the variable of interest , the fresh ore feed rate, and the mill rotation speed ....
In this research, we present the development of real-time optimization RTO strategies for the parameters of a multivariable controller MPC of a semi-autogenous mill SAG system that takes economic and operational variables into account eg cost of energy, materials, fresh ore, grinding media, fresh water, etc...
Model Predictive Control for SAG Milling in Minerals Processing 5 Model Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure...
Benefits Obtained with Continuous Use of Advanced Process Control Applications at Codelco El Teniente Jorge Muratt Honeywell / Kairos Mining, Chile Patricio Giménez Codelco Chile Juan Villalobos, Nicolás Pérez, Matías García Honeywell / Kairos Mining, Chile ABSTRACT The main objective expected by using APC advanced process control applications in copper concentrator plants is to reduce ....
this, control techniques such as PID, multivariate, expert systems, fuzzy logic, neural networks, model predictive , SAG mill, and then its classi ed by a vibratory screen, the , Hybrid Model Predictive Control for Grinding Plants ....
semiautogenous grinding SAG mills and is the last in a five-part series on Inferential Measurement of SAG Mill Parameters Inferential measurements of SAG mill discharge and feed streams and mill rock and ball charge levels, detailed earlier in the series, are utilised in a simulation environment...
DMC-based controllers for the SAG mill, CIL and tailing thickeners were installed , and then automated the optimal operational strategy using multivariable dynamic matrix control for lasting ....
Aug 14, 2015 0183 32 Process control challenges and opportunities in mineral processing Variations in feedstock hardness, grade and rock size lead to fast and frequent unmeasured disturbances, calling for the best of technologies and techniqu By Greg McMillan and Stan Weiner, PE Aug 14, 2015...
Results of the multivariable predictive control applications in mineral processing are discussed, and in particular the application to the SAG mill In addition, an example of the benefits improvement that can be achieved with this technology is presentedINTRODUCTIONThere has been a long term perception in the mainstream mineral processing ....
AG/SAG mills are normally used to grind run-offmine ore or primary crusher product Feed size to the mill is limited to that size which can be practically conveyed and introduced into the mill The mill product can either be finished size ready for processing, or an intermediate size ready for final grinding in a ball mill, pebble mill,...
multivariable process control in clinker grinding multivariable process control in clinker grinding Description Golden Bay Cement , the second by grinding and milling clinker wit gypsum the final product cement is Advanced Controller for Grindindg Mills Mill Grinding Advanced Controller for Grindindg Mills We describe an advanced ....
multivariable controller for sag mill - gcpa Robust control of a SAG mill manuel villon Robust control of a SAG mill robust multivariable Parameters for robust SAG mill controller significant role in shaping the Contacter le fournisseur »...
Nov 12, 2012 0183 32 The SAG mill process uses steel balls and large rocks for grinding The load consisted of ore, steel balls and water In addition to stabilizing the process and increasing production rates, the control system must protect the lining by ensuring the rocks fall on other rocks and not the lining , Questions about Multivariable Control, Flow ....
advanced multivariable process control techniques but also captures human knowledge and experience A basic template of fuzzy logic rules is based on , of an expert system on a SAG mill has resulted in a 6 improvement in throughput in addition to an overall reduction in the variability of power and load Table 1...
Kairos also supported a Yamana Gold operation, located in Brazil, providing advice on the implementation of a multivariable control system for its SAG mill In 2012, Kairos will continue supporting the implementation of the Concentrator Automation programme at Codelco, which should be completed in 2013 MIRS Mining Industry Robotic Solutions SA...
The validity of the multivariable control technique was verified by computer simulation and model mill experimentation This paper describes 1 modeling, 2 control system design, 3 computed results, 4 experimental results and 5 a precision bar rolling system which was practically implemented at the bar mill of Muroran Works, Nippon Steel in ....
approaches varying from decentralized PID control to multivariable predictive control have been applied to control of SAG mills with variable success at the same time, new sensors has been developed with the aim to provide real time measurements of important variables currently unmeasured...
Control of a grinding mill circuit using fractional order controllers , In general, multivariate control techniques are used to solve this issue, such , The circuit consists of a semiautogenous SAG mill with an end-discharge grate, a sump and a hydrocyclone The mill receives four streams as inputs mined ore MFO , water MIW to assist with...
1 Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement CW Steyn , K Keet , W Breytenbach Control Engineer, Anglo American Platinum, Control and Instrumentation Department, Johannesburg....
Advanced Controller for Grinding Mills Results from a Ball Mill Circuit in a Copper Concentrator , upsets such as mill spills and/or power excursions in SAG mills, centrifuging in ball mills, , Block diagram of Total PlantTM SmartGrind multivariable predictive controller MILL CONTROL BALL MILL CONTROL EXAMPLE...
EXPERIENCES AND PROJECTIONS ON SAG MILL MULTIVARIABLE PREDICTIVE CONTROL , SAG mill, multivariable predictive control MPC , process , approach to face SAG mill controller specification As a ....
Precise control of SAG mill loading and flotation cell level is critical to maximize production and , to derive a control law for the multivariable case it is preferable to optimize for a cost function such as the one proposed in the generalized predictive control 3 , rather , Model Predictive Control of SAG Mills and Flotation Circuits ....
Control of -SemiAutogenous Grinding SAG mill weight is an example of an important process that exhibits many of these aspects Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production Powell, MS, van der Westhuizen, AP, Mainza, AN 2009...
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