controller for sag mill

Supervisory Fuzzy Expert Controller for Sag Mill Grinding ...

Supervisory Fuzzy Expert Controller for Sag Mill Grinding ...

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 ...  · Building A Large Post Frame Garage Full Time-lapse Construction: NEVER BEFORE SEEN FOOTAGE - Duration: 16:28. RR Buildings Recommended for you Founded by Dr. Karl Gugel, Digital Control Lab started its life in 1998 as an electronics consulting firm known as DiCon Labs. During the early years, DiCon Lab was contacted by a leading cement manufacturer to replace microphone based systems for real-time mill loading measurements.

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BrainWave SAG mill - ANDRITZ

BrainWave SAG mill - ANDRITZ

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. Therefore the SAG mill speed could not be controlled using the microphone based signal and instead was manually controlled/set by the control room operator. Thus operation/speed of the mill could and would change significantly based on a particular operator running the mill and their overall level of mill operation experience and skill.  · This article presents the basis of a supervisory fuzzy expert controller for SAG mill circuits. Although leading companies in control and automation have their own commercial packages, this supervisory controller is coded in Matlab using Mamdani method and is able to connect to plant lower level control system.

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SAG Mill Optimization using Model Predictive Control

SAG Mill Optimization using Model Predictive Control

 · Hi List: We have an application in a SAG Mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill. Our idea is to convert the amplitude and frequency of noise to a 4-20mA signal (or something else) in order to... SAG Mill Control . SAG mills can be optimized for maximum ore throughput or maximum grinding energy efficiency. In both cases, precise control of the mill filling percentage is critical (Wills and Napier-Munn, 2006). Maintaining constant mill weight, as indicated by bearing pressure, is one approach to stabilize the mill ... 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).

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Autogenous and Semi-Autogenous Mills -

Autogenous and Semi-Autogenous Mills -

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 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 Power Optimiser: • The standard deviation of the mill feed control is greatly reduced. • The cyclone feed is more stable, allowing for consistent size separation and feed to downstream processes. 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.

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Mill (grinding) - Wikipedia

Mill (grinding) - Wikipedia

this controller a MIMO-ARX based MPC. We use an industrial Semi-Autogenous Grinding (SAG) mill to illustrate the performance of this controller. SAG mills are the primary units in a grinding chain and also the most power consuming units. Therefore, improved control of SAG … One of the workhorses of the minerals industry is the autogenous grinding (AG) mill and its derivative the semi-autogenous (SAG) mill. These are relatively well understood, but not so Scrubbers. In this case, mill speed is the primary manipulated variable used to control mill load. 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.

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SAG Mill Control at Northparkes Final

SAG Mill Control at Northparkes Final

SAG Mill Control at Northparkes Page: 1 www.mipac.com.au SAG Mill Control at Northparkes Mines (Not So Hard After All) A. J. Thornton, Principal Process Control Engineer1 Tom Pethybridge, Production Superintendent – OPD2 Tom Rivett, Process Control Engineer2 Richard Dunn, Metallurgical Superintendent2 1. Enhanced mill performance. SAGwise total process control uses specially designed acoustic sensors and proprietary process control software to monitor and respond to critical impacts inside your SAG Mill. Conditions inside your mill are automatically adjusted to minimise liner damage, stabilise and then optimise the operation of a SAG Mill. 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…

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Digital Control Lab

Digital Control Lab

 · In this training module, we'll cover the workings of a semi-autogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circuit. Ore that’s crushed in a primary ... 1 Optimization and Control of a Primary SAG Mill Using Real-time Grind Measurement C.W Steyn*, K Keet**, W Breytenbach*** *Control Engineer, Anglo American Platinum, Control and Instrumentation Department, Johannesburg, Piñon Ridge Mill Facility Montrose County, Colorado Visus Consulting Group, Inc. Novem Appendix A – Process Control Philosophy The source of this appendix is the Piñon Ridge Project Basic Engineering Report prepared by CH2M HILL Engineers, Inc., dated Febru (CH2M HILL 2009).

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SAG Mill Expert System Grinding Circuit

SAG Mill Expert System Grinding Circuit

The paper will present a case where fuzzy logic was the logical choice to improve performances of a semi-autogenous grinding (SAG) mill. The SAG mill stability had to …

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