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Control optimization for a SAG mill at the Raglan mine - BBA

Production stability. This innovative project completely redefined how to optimize a system like the one we operate at the Raglan Mine. BBA surprised us by applying fuzzy logic to control our SAG mill. The results exceeded our expectations. Pierre Barrette, Surface Operations and Maintenance Manager, Xstrata Nickel Mine Raglan.


SAG mill wear optimization using DEM simulation - Rocky …

Video 1: Mill Showing Surface Wear Modification Case scenario. Consider a large SAG mill with a diameter of 10.97 m, as shown in Figure 1a. The mill has a high-definition line design with alternating lines of high and low …


(PDF) Grinding mills: how to accurately predict their ...

1). In this paper the factors which need to be addressed in order that tumbling mill power draw can. be accurately predicted are discussed. A power model that incorporates each of these factors is ...


Outotec presents the world's largest SAG mill - …

The mill will be driven by a Gearless Motor Drive (GMD) which at 28.0MW is equal to the largest grinding mill power ever used in the mining industry. The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance. The mill will be operated as a single stage SAG mill ...


Online SAG Mill Pluse Measurement and Optimization ...

@article{osti_969329, title = {Online SAG Mill Pluse Measurement and Optimization}, author = {Rajamani, Raj and Delgadillo, Jose and Duriseti, Vishal}, abstractNote = {The grinding efficiency of semi autogenous milling or ball milling depends on the tumbling motion of the total charge within the mill. Utilization of this tumbling motion for efficient breakage of particles …


Simple SAG Mill - Official Feed The Beast Wiki

The Simple SAG Mill is a machine added by Ender IO. It uses Micro Infinity (µI) to grind (or mill) items into their crushed variants, like Ores into Dusts. The Simple SAG Mill has four output slots; recipes can have 1-4 different outputs, with different chances of obtaining those outputs. Similar to Ender IO's other Simple machines, capacitors cannot be used in the Simple …


Mill power draw models - SAGMILLING.COM

Mill Power Draw Models. The mill power draw models are used to predict how much power will be consumed by a particular type of mill, mill geometry and set of mill operating conditions. This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models.


MillPower SAG Mills: SAG Mill Power Estimation, Hogg ...

MillPower SAG Mills: SAG Mill Power Estimation, Hogg & Fuerstenau Model. Objetivo General. Estimar la demanda de potencia neta y bruta (kW) de un molino semiautogeno (SAG) como función de sus dimensiones conocidas y condiciones básicas de operación.


SAG Mill - Official Feed The Beast Wiki

The SAG Mill is a machine added by Ender IO.It uses Micro Infinity (µI) to grind (or mill) items into their crushed variants, like Ores into Dusts.The SAG Mill has four output slots; recipes can have 1-4 different outputs, with different chances of obtaining those outputs. Uniquely, the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency …


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).


Modelling: Transfer size limits - SAGMILLING.COM

How is the automatic T 80 calculated?. The software looks at the primary and secondary grinding stages and sees how much power is available in each stage. For example, the SAG mill may have 10 MW of power draw available and the two ball mills each of 7.5 MW of power draw available for a total of ratio of 10:15 (1:1.5).


Throughput optimisation in milling circuits - Process IQ

SAG Mill Power. SAG milling can be optimised to achieve maximum breakage and throughput (or any other number of objectives). The relationships between the key variables are highly non-linear and shift as the ore hardness, steel load and liner conditions change. Traditional and basic control and modelling techniques are therefore not veryfective.


A comparison of SAG mill power models - …

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. This paper will compare SAG mill models by Morrell, Loveday (using "Power Numbers" published by Barratt) and Austin against several published mill surveys.


TECHNICAL NOTES 8 GRINDING R. P. King - …

LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...


SAG Mill Control: It Shouldnt be that Hard

SAG mill control fundamentally means managing the load in the mill by adjusting the feed rate of ore to the mill and/or manipulating the rotational speed of the mill. The best way to measure load is to mount the mill on load cells. The …


Modelling SAG milling power and specific energy ...

This distribution affects the SAG mill load and the load affects directly the mill power and the efficiency of the mill operation (Van Nierop and Moys, 2001). If a SAG mill has been designed with a conventional power or specific energy model which do not consider the projected feed size distribution it is likely that this mill will reach the ...


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


CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 …

1 CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL T. Orser1, V. Svalbonas 2 and *M. Van de Vijfeijken 3 1Newmont Mining Corporation 10101 East Dry Creek Road Englewood, CO 80112, USA 2Metso Corp. 2715 Pleasant Valley Rd.


SAG mill optimization insights by measuring inside the ...

The paper shows how measurements from inside an operating SAG mill are now a reality. The paper discusses how the measurements might affect and enhance energy efficient mill optimisation. Energy efficient comminution is a pre-occupation of mineral processing researchers and practitioners.


Mill drives: the desire for increased power and the ...

SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved. Accordingly, the latest 40 ft dia. SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option


OPTIMAL SAG MILL CONTROL USING VIBRATION & …

plots taken from a copper mine SAG mill. In the plot, the mill is shown to be rotating in a clock-wise direction with energy plotted increasing towards the center of the plot. The top of the mill/plot corresponds to 0 degrees and the bottom of the plot corresponds to 180 degrees.


SAG Mill Grinding Circuit Design - 911metallurgist.com

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. This paper will compare SAG mill models by Morrell, Loveday (using "Power Numbers" published by Barratt) and Austin against several published mill surveys.


SAG Mill Power Model - Grinding & Classification Circuits ...

Prediction of correct sag mill power consumption with a change in ore hardness, solid percent (density) to the sag feed, rpm of sag and PSD has always been very tricky. So far, I have used Austin-Morrell model and Hogg- Fuerstenau power model, but these models seem to work well only under certain boundary conditions.


MILLING CONTROL & OPTIMISATION - Mintek

• Uses the changes in the mill load and power to automatically detect whether the mill is overloaded or underloaded. • Uses . safety controllers. to change the solids feed rate and feed water to prevent mill overloads. • Estimates the power load curve and optimum load. By optimising the mill power usage and preventing mill overloads,


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).