Parameter Process In Sag Mill

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INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV ...

Authors’ final version of paper published in Minerals Engineering 22(12):1032-1044, Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV: INFERENTIAL MODEL VALIDATION T. A. APELT*§ and N. F. THORNHILL§ § Centre for Process Systems Engineering, Imperial College SW7 2BY. Email: [email protected]

INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS V: …

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.

The Optimization of Process Parameters of Large-Scale SAG Mill

The Optimization of Process Parameters of Large-Scale SAG Mill. Article Preview. Abstract: This paper is based on the kinetic theory of ore and steel balls in the SAG Mill and theoretical research of power consumption. Orthogonal method is taken to design experimental plan while effective power of the SAG Mill, collision times between steel ...

SAG Mill Grinding Circuit Design

Jun 06, 2016· It can be very difficult operationally to trade grind for throughput in an SAG circuit—once designed and constructed for a given circuit configuration, an SAG mill circuit has limited flexibility to deliver varying product sizes, and a relatively fixed unit power input for a given ore type is typically required in the SAG mill.

Characterization and Modeling of Semi-Autogenous Mill ...

Jan 01, 2011· These parameters should be incorporated in the control algorithms looking for an improvement in SAG mill's performance. In this work, a qualitative and quantitative characterization of the performance of a SAG mill when faced to ore size distribution disturbances is developed.

SAG Mill Optimization using Model Predictive Control

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, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009).

Key considerations when selecting a mill lining system

2.1 SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently downloaded into the discharge zone, where, according to a classification probability, they are either returned to the milling chamber for further grinding or become part of the mill output stream.

Model Predictive Control of SAG Mills and Flotation Circuits

Use of the Laguerre process model implicitly assumes that a self-regulating process is to be modeled. In cases where a process exhibits integrating behaviour, such as SAG mills can exhibit at high loads, it is necessary to modify the Laguerre process model. The modification is two-fold. First, the . P124 09/03 www.andritz.com 5 of 12

INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV ...

Authors’ final version of paper published in Minerals Engineering 22(12):1032-1044, Oct 2009 INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS IV: INFERENTIAL MODEL VALIDATION T. A. APELT*§ and N. F. THORNHILL§ § Centre for Process Systems Engineering, Imperial College SW7 2BY. Email: [email protected]

The Optimization of Process Parameters of Large-Scale SAG Mill

The Optimization of Process Parameters of Large-Scale SAG Mill. Article Preview. Abstract: This paper is based on the kinetic theory of ore and steel balls in the SAG Mill and theoretical research of power consumption. Orthogonal method is taken to design experimental plan while effective power of the SAG Mill, collision times between steel ...

INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS V: …

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.

Key considerations when selecting a mill lining system

Jan 27, 2020· Type of milling process and operational parameters. SAG and ball mills grind material through different actions and are usually applied in different stages of the process. SAG mills usually have a larger diameter than length and are used to reduce large feed size ore (typically ~300mm) down to ~3mm, often for further grinding in a secondary ...

Advanced Simulation for Semi-Autogenous Mill Systems: A ...

2.1 SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently downloaded into the discharge zone, where, according to a classification probability, they are either returned to the milling chamber for further grinding or become part of the mill output stream.

Parameters Optimization SAGmill 40x26.compressed

Jul 14, 2015· Parameters Optimization SAGmill 40x26.compressed 1. DEVELOPMENT PROPOSAL FOR IMPROVEMENT WITH METHODOLOGY SIX SIGMA RESEARCH WORK OPTIMIZATION OF COMMINUTION IN PROCESS IN SAG MILL 40'POR 26’ AUTHOR: Eng. MBA Richard B. Cusi Davila, CMRP Master Six Sigma Black Belt 2014

Model Predictive Control of SAG Mills and Flotation Circuits

Use of the Laguerre process model implicitly assumes that a self-regulating process is to be modeled. In cases where a process exhibits integrating behaviour, such as SAG mills can exhibit at high loads, it is necessary to modify the Laguerre process model. The modification is two-fold. First, the . P124 09/03 www.andritz.com 5 of 12

Optimizing your SAG mill operation - International Mining

Mar 21, 2007· Sanjeev Latchireddi, Chief Process Engineer – Grinding Americas, Outokumpu Technology, looks at the shift from ball mills to SAG mills. Nowadays, the more successful plants are those that have adopted effective and efficient strategies to optimize their plant operation.

AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND …

3 SAG mill (8 – 15% ball charge) Variable competency ore 4 High ball charge SAG mill (15 to 25% ball charge) Incompetent ore 5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3, and 5 ) with recycle crusher

Optimizing Performance of SABC Comminution Circuit of …

the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in ... adjusting and optimizing equipment and process parameters related to the SABC comminution circuit to maintain a more even distribution of equipment capacity. 1.2. Requirement for Circuit Simulation

FLOTATION PLANT DESIGN AND PRODUCTION PLANNING …

In the case of SAG mill – ball mill circuits, the fluctuations in tonnage and grind are known to be high. The modelling approach described in this paper allows for changes in the measured flotation kinetic parameters in order to reflect the expected grind as determined by the comminution process. A valuable aspect of the geometallurgical

SPECIFIC COMMINUTION ENERGY - SMC Testing

pebble crusher and combined SAG/Ball mill stages. The model was originally developed using 3 data bases of operating comminution circuits to validate and benchmark its accuracy. These 3 data bases cover crushers, HPGRs and AG/SAG/ball mill circuits. In particular the latter data base contains over 120 different operating plants and conditions.

SAGwise™ total process control The key to efficient SAG ...

SAGwise total process control manages all key parameters: Parameters monitored: Mill power consumption Load impacts Mill load Pulp density Parameters controlled: Mill speed Feed rate Mill water The result is precisely what you hope to achieve with your SAG mill optimisation efforts: not only higher production and optimal energy

Mill (grinding) - Wikipedia

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.

INFERENTIAL MEASUREMENT OF SAG MILL PARAMETERS V: …

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.

SAGwise™ total process control The key to efficient SAG ...

SAGwise total process control manages all key parameters: Parameters monitored: Mill power consumption Load impacts Mill load Pulp density Parameters controlled: Mill speed Feed rate Mill water The result is precisely what you hope to achieve with your SAG mill optimisation efforts: not only higher production and optimal energy

Advanced Simulation for Semi-Autogenous Mill Systems: A ...

2.1 SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently downloaded into the discharge zone, where, according to a classification probability, they are either returned to the milling chamber for further grinding or become part of the mill output stream.

Model Predictive Control of SAG Mills and Flotation Circuits

Use of the Laguerre process model implicitly assumes that a self-regulating process is to be modeled. In cases where a process exhibits integrating behaviour, such as SAG mills can exhibit at high loads, it is necessary to modify the Laguerre process model. The modification is two-fold. First, the . P124 09/03 www.andritz.com 5 of 12

Optimizing your SAG mill operation - International Mining

Mar 21, 2007· Sanjeev Latchireddi, Chief Process Engineer – Grinding Americas, Outokumpu Technology, looks at the shift from ball mills to SAG mills. Nowadays, the more successful plants are those that have adopted effective and efficient strategies to optimize their plant operation.

SAG Mill Operation at Cortez: Evolution of Liner Design ...

123 PAPER 9 SAG Mill Operation at Cortez: Evolution of Liner Design from Current to Future Operations Julius Stieger1, Process Superintendent Dave Plummer2, Process Maintenance Planner Sanjeeva Latchireddi3, Chief Process Engineer Raj K. Rajamani4, Professor – Metallurgical Engineering 1Barrick - Cortez Gold Mines Star HC66 Box 1250

FLOTATION PLANT DESIGN AND PRODUCTION PLANNING …

In the case of SAG mill – ball mill circuits, the fluctuations in tonnage and grind are known to be high. The modelling approach described in this paper allows for changes in the measured flotation kinetic parameters in order to reflect the expected grind as determined by the comminution process. A valuable aspect of the geometallurgical

Optimizing Performance of SABC Comminution Circuit of …

the SAG mill and ball mill was 8658 kW, which caused partial over-grinding. From experience in ... adjusting and optimizing equipment and process parameters related to the SABC comminution circuit to maintain a more even distribution of equipment capacity. 1.2. Requirement for Circuit Simulation

AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND …

3 SAG mill (8 – 15% ball charge) Variable competency ore 4 High ball charge SAG mill (15 to 25% ball charge) Incompetent ore 5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3, and 5 ) with recycle crusher

THE COMMINUTION CIRCUIT DESIGN FOR THE …

The Axb parameters, which were used to determine SAG mill throughput, are inversely related to the core competency. That is, the lower the value, the more competent the ore and the lower the throughput for a given SAG mill geometry and operating condition.

THE ENGINEERING AND PROCESS EFFECTS OF CHOOSING …

mill operation as the operating parameters vary. The SAG mill power draw model of Austin (using the calibration by Doll, 2013) is used to predict the process power draw at the mill shell, Pshell, and the efficiency losses for the drive's mechanical components based on Doll (2012) are used to determine the motor output power, P.

AN UPDATED DATA SET FOR SAG MILL POWER MODEL …

A data set of mill operating data is collected from published information and compared to predictions made by two published mill power draw models for SAG mills (Austin's SAG model and Morrell's C-model). A third model (Hogg and Fuerstenau) is fit to each survey and the principal fitting parameter is tabulated. Power measurement

Evolution of SAG Mill Process Control at the Xstrata ...

In addition to the new process equipment, the SAG mill was commissioned with all controls implemented on the new PLC software platform. This removed the control strategy limitations previously described. Additional mill control loops and measurements now included: - Mill feed tonnage (automatic PI control – operator or remote set-point from mill

Dynamic modeling and simulation of a SAG mill for mill ...

May 01, 2018· 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.