CIMExcel Software Inc. Slide 1 Performance Solutions for the Mineral Processing Industry for Pit to Plant Optimization Optimal Mineral Processing Control (OMPC) Mineral Processing Operations Simulator (MPOS) Analysis and Engineering Services Throughput Increase % Recovery Increase %

OMPC CIMExcel Software Inc. Slide 2 Optimal Mineral Processing Control (OMPC) Increases Stability and Reduces Variability Increases Ore Throughput and Metal Recovery Primary Mill Control and Optimization Cyclone Scheduling and Optimization Flotation Cell Level Control Flotation Control and Optimization Integrated Conventional and Advanced Control

OMPC CIMExcel Software Inc. Slide 3 OMPC - Integrated Conventional and Advanced Control Conventional Control: Feeder Speed Primary Mill Dual Power - Load Primary Mill Speed Primary Mill Solids Primary Mill Water Addition Primary Mill Additives SFPB and CFPB Level Cyclone - Underflow and Overflow Water Addition Ball Mill Additives Flotation - Air Flow and Reagents Flow Lube Systems Temperature Advanced Control: Primary Crusher Gap Optimization Feeder Speed Ratios Modal Control Feedrate Control ( fixed / variable speed conveyor ) Ore Quality Feedforward Control for Feedrate and Solids Advanced Hill-Climbing Optimization for Feedrate and Solids SFPB Solids (with variable speed SFP) Cyclone Scheduling - Ball Mill Grinding Optimization (fixed/variable speed CFP) Cyclone - Overflow Solids Control and Optimization Flotation Cell Level Nonlinear Model Reference Modal Control Flotation Air Flow and Reagents Ratios Optimization

OMPC CIMExcel Software Inc. Slide 4 OMPC - Throughput Optimization Primary Crusher Gap Optimization Feeder Speed Ratios Modal Control Feedrate Control ( fixed / variable speed conveyor ) Ore Quality Feedforward Control for Feedrate and Solids Advanced Hill-Climbing Optimization for Feedrate and Solids Ore Load Control Mode Feedrate and Power Constraints Mode Steel Charge Optimization (long term advisory) Continuous Response Identification and Learning

OMPC CIMExcel Software Inc. Slide 5 OMPC - Advanced Hill-Climbing Optimization All trend windows herein display 100 minutes of operation.

OMPC CIMExcel Software Inc. Slide 6 OMPC Throughput Optimization - Increased Throughput ~ 5 % A and B Primary Grinding lines are identical and are fed from the same stockpile. There are moderate variations in the stockpile ore quality. A-line has OMPC – Throughput Optimization active and averages 951 Tph. B-line has conventional dual power-load control and water ratio control active and averages 901 Tph.

OMPC CIMExcel Software Inc. Slide 7 OMPC - Ore Quality Feedforward Control The particle size distributions for the relative grinding time (RGT = 0.8, 1.0, 1.2) are determined from belt cut testing and correlation with the Ore Size Analyzer data. The realtime Ore Size Analyzer data is used to determine the current value of the Relative Grinding Time. The Relative Grinding Time, the current steel load, and the time from the last lifter/liner/grate rebuild are used to determine the Maximum Feedrate. OMPC uses the Maximum Feedrate value as the remote setpoint to the Feedrate Control Loop.

OMPC CIMExcel Software Inc. Slide 8 OMPC - Ore Quality Feedforward Control Ore Quality Feedforward Control provides very stable primary mill operation during moderately variable ore quality conditions.

OMPC CIMExcel Software Inc. Slide 9 Conventional Power-Load Control Loop For the conventional power-load control loop for the above primary mill power and load performance curves, the operator needs to enter a water ratio value (0.65), a power setpoint value (6700 kw), a load setpoint value (660 psi), a high power feeder cutback value (7100 kw), and a high load feeder cutback value (675 psi). These values are critical and determine the throughput and the operating stability of the primary mill. If feeder cutbacks are encountered - the operator will lower these values, if no feeder cutbacks have been encountered - the operator will raise these values.

OMPC CIMExcel Software Inc. Slide 10 OMPC - Ore Quality Feedforward Control In the above, A-line and B-line are fed from the same stockpile with moderately varying ore quality. A-line has Ore Quality Feedforward active and averages 962 Tph. B-line has Conventional Power-Load Control active and averages 652 Tph. There is a significant performance improvement with OMPC Ore Quality Feedforward Control.

OMPC CIMExcel Software Inc. Slide 11 OMPC - Recovery Optimization Cyclone Scheduling - Ball Mill Grinding Optimization (with fixed/variable speed CFP) Cyclone - Overflow Solids Control and Optimization Flotation Cell Level Nonlinear Model Reference Modal Control Flotation Air Flow and Reagents Ratios Optimization

OMPC CIMExcel Software Inc. Slide 12 OMPC - Recovery Optimization - Increased Recovery ~ 2 % A1 and A2 Ball Mill - Cyclones - Flotation sides are identical and are fed equally from the same primary mill with the same particle size distribution. A1-side has OMPC - Cyclone Scheduling active, A2-side does not. Both sides have OF Density Optimization, Feedforward Air Ratio and Reagents Flow Ratio turned on. A1-side averages 89.8% recovery efficiency. A2-side averages 87.6% recovery efficiency.

FCLNMRMC CIMExcel Software Inc. Slide 13 Flotation Cell Level Nonlinear Model Reference Modal Control Q slurry in ÷ f i -1 () Hysteresis Compensator valve position V j Feedforward Dynamic Observer PI actuator positioner U j Level Setpoints Operator Fixed Feed Dependent Startup/Shutdown Level i Q air i Solids in Level i Q air i LiLi

FCLNMRMC CIMExcel Software Inc. Slide 14 Flotation Cell Level Nonlinear Model Reference Modal Control operator cell level setpoint changes time scale: 10 minutes per division, 100 minutes

Mineral Processing Operations Simulator (MPOS) MPOS can be used for, Operator Training Facilities (junior to senior operators) Control System Checkout and Tuning Advanced Control System Design and Testing HMI Design and Testing Process and Equipment What-if Analysis Operator Training Facilities: Control Room HMI Displays and Inputs Control System and Motors Process Model - Accurate Operating Values and Dynamic Responses Operator Training Scenarios - Variations in Ore Quality and Failures of Equipment MPOS CIMExcel Software Inc. Slide 15

MPOS CIMExcel Software Inc. Slide 16 MPOS - Operator Training - Control Room Displays

MPOS CIMExcel Software Inc. Slide 17 MPOS – Particle Size Distributions – Pit to Plant

MPOS CIMExcel Software Inc. Slide 18 MPOS - Semi-Autogenous Mill Model

MPOS CIMExcel Software Inc. Slide 19 MPOS - Autogenous Mill Model

MPOS CIMExcel Software Inc. Slide 20 MPOS – Pebble Crusher Model

MPOS CIMExcel Software Inc. Slide 21 MPOS - Ball Mill Model

MPOS CIMExcel Software Inc. Slide 22 MPOS - Cyclone Model

MPOS CIMExcel Software Inc. Slide 23 MPOS - Flotation Model

MPOS CIMExcel Software Inc. Slide 24 MPOS - Flotation Cell Level Dynamic Model Q air 1 Q in S in L1L1 V1V1 U1U1 Q air i LiLi ViVi UiUi Q air n ρnρn LnLn VnVn UnUn z1z1 zizi ρiρi ρ1ρ1 The Flotation Cell Level Dynamic Model includes, actuator-valve hysteresis valve characteristic curve air actuator-valve hysteresis air valve characteristic curve pulp/slurry level intertank flow cell solids, void fraction, density

MPOS CIMExcel Software Inc. Slide 25 MPOS - Comprehensive Operator Training Scenarios

CIMExcel Software Inc. Slide 26 Pit to Plant Analysis Services Primary Crushing Operations - Ore Size Distribution and Variability Analysis Stockpile Ore Size Distribution Measurement, Classification and Grindability Analysis SAG / AG Mill Feedrate, Power, and Load Testing and Analysis, Ore Quality dependent Performance Curves SAG / AG Mill Speed and Water Ratio Testing and Analysis, Ore Quality dependent Performance Curves Pebble Crusher Performance Testing and Analysis SAG / AG Mill, Ball / Rod Mill, Pebble Crusher, Screening Particle Size Distribution (PSD) SAG Steel Charge and Distribution, Wear Analysis Primary Mill Internal Grinding Analysis (Steel Distribution, Packing, Lifter Wear, Grate Wear) Ball Mill Steel Charge Analysis Screen Feed Pump Curves Cyclone Pack Pressure and Flow Curves Cyclone Overflow and Underflow Mass Flow and Solids Curves Cyclone Overflow and Underflow PSD Analysis and Partition Curves Ball / Rod Mill Power Draw Curves Ball Mill - Cyclone Circuit Grinding Analysis and Optimization Flotation Feed Grade, PSD, Slurry Flow and Solids, Air Flow, Reagents Flows Recovery Analysis Tailings - Critical Particle Size and Sanding Rate Analysis VFD - Variable Speed Operation (Primary Feed Conveyor, Primary Mill, SFP, CFP, Ball Mill) Actuator-Valve Hysteresis Analysis

CIMExcel Software Inc. Slide 27 Engineering Services Instrumentation Requirements Signal Processing and Filtering Design and Testing OPC Connectivity and Integration Controllability and Variability Analysis Control Loop Functional Analysis, Design and Testing User Interface Functional Analysis, Design and Testing IEC 1131 Specifications, Programming and Testing DCS Checkout Support System Startup and Troubleshooting Support