Example of ABB Ability™ Expert Optimizer integrated directly into ABB Ability™ System 800xA for grinding and flotation optimization in minerals processing

ABB Ability™ Expert Optimizer, ABB’s Advanced Process Control (APC) solution using straightforward design and deployment of model predictive control (MPC) with ABB Ability™ System 800xA DCS enables higher level of automation and optimization in a grinding and flotation circuit example.

In a typical grinding circuit ore is fed into the mills where abrasion, attrition and impact reduce its size. Usually, the grinding circuit contains at least two interconnected mills with material classifiers (e.g. cyclones) separating the fine material from the coarse (that then goes for regrinding).

The process is energy intensive with power consumption of roughly 20 to 30 MW and feed throughputs of 2,500 to 3,000 t/hr. Process variables are mill loads, motor torque and power, plus pressures and flow rates. The ground product is specified in terms of fineness.

The typical results of an APC controller are increased throughput, homogeneous product quality, reduced consumables and lower maintenance costs.
Further, ABB Ability™ Expert Optimizer can be advantageously deployed in the flotation plant, where the ground ore, now in slurry form, is “washed” to separate valuable minerals from waste. The goal is maximum production or maximum yield at a given concentrate quality. 

ABB Ability™ Expert Optimizer performs timely adjustments to froth levels, air flows and reagents leading to process stabilization, minimized reagents and increased recovery.

Want to optimize grinding and flotation using real time data and detect changes to ore grade as it is extracted?

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  • Particle size controlled
  • Mill loads stabilized (standard deviation decreased by 79%)
  • Autopilot for operators
  • No constraint violations with respect to power, torque, mill load
*Results gathered over a six month evaluation
  • Recovery increased by 1%
  • Reduction of variability in product grade
  • Increased stability of froth levels and reagent consumption

*Results gathered over a two month evaluation

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