Environmental Engineering Reference
In-Depth Information
The application of BrainWave ® has been reported in various mining processes
such as level control in secondary and tertiary crushers, particle size distribution
control in ball mills, cascade control of power and inventory in SAG mills, flota-
tion cell level control, thickener density control and molybdenum concentrate dryer
control.
BrainWave SAG Mill is a control package using model-based predictive con-
trol technology that accounts for changes in mill rotation, recycled pebbles and ore
quality to maintain mill weight and maximize production. As the weight controller
adjusts the set-point for fresh ore feed, a second BrainWave controller defines the
feeder speed to ensure that the right amount of material is delivered to the mill.
Additionally, BrainWave ® can automatically adjust its control settings to allow for
different operation due to changes in ore hardness over time. BrainWave ® was in-
stalled at the Minera Los Pelambres copper concentrator site in order to tightly con-
trol the weight in the SAG mill and thereby promote optimum grinding. According
to Andritz, the strategy has been demonstrated to improve mill throughput by as
much as 3%.
HONEYWELL
Honeywell offers a family of products known as Profit Suite for advanced process
control and optimization. Most of its components can be used in mineral process-
ing applications. These products include Profit Suit Early Event Detection (EED)
Toolkit, Profit ®
Sensor Pro, Profit ®
Loop, Profit ®
Controller, Profit ®
Optimizer,
Profit ® Bridge, Profit ® Max and UniSim Design Suite [52].
The Profit ® Suite EED Toolkit provides a statistical modeling and application
environment to identify, localize and support the reduction of abnormal situations
in processes and plant equipment. It uses principal component analysis (PCA) and
fuzzy modeling. The Toolkit's PCA modeling interface provides intuitive controls
and options to suit both novice and expert users. The Fuzzy Logic Modeling Toolkit
employs an analytical method for PCA post-processing.
Profit ® Sensor Pro is a data analysis and regression tool used to develop models
for on-line prediction and soft sensor applications. Profit ® Sensor Pro permits the
analysis of complex data sets using a suite of advanced mathematical tools, includ-
ing ordinary least squares (OLS), weighted least squares, and partial least squares
(PLS) regression, as well as PCA and statistical variable ranking. ProfitSensorPro
capabilities include the development of linear and non-linear models for off-line
analysis and on-line deployment.
Profit Loop is a single input/single output MPC application designed with the
operating simplicity of a standard PID controller. This technology is a Smith pre-
dictor, gap controller, and optimizer all in one that is used for controlling discrete
analyzers, tank levels and long process delays.
Profit ® Controller, based on Honeywell's Robust Multivariable Predictive Con-
trol Technology (RMPCT), provides the tools for designing, implementing and
maintaining multivariable control and optimization strategies to control complex
and highly interactive industrial processes. The objective function employed by
Profit ® Controller is
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