Model predictive control (MPC)
On a grinding circuit, one controller coordinates mill power, feed rate, and water addition to hold particle size at higher throughput.
Mineral Processing Advanced Process Control
Mineral processing advanced process control (APC) stabilizes grinding mills, flotation circuits, furnaces, and leach circuits so throughput and recovery hold as ore and feed change. Atlas Prediction Control restores and sustains APC performance inside the control systems you already run.
Request a Plant Performance ScanMetals and mining
Mineral Processing Advanced Process Control
Where APC pays off in metals and mining
| Unit | Interacting variables and limits | APC objective |
|---|---|---|
| SAG and ball mills | Mill power, load, feed rate, water addition, particle size | Maximize throughput at stable grind |
| Flotation circuits | Reagent dosing, pH, froth level, air rate | Improve recovery and concentrate grade |
| Furnaces and kilns | Temperature profile, fuel rate, feed rate, off-gas limits | Stable operation with lower fuel use |
| Leach and thickener circuits | Density, residence time, flow limits | Even throughput and steady downstream quality |
Signs a mineral processing unit is ready for APC.
Several variables interact, so moving one loop disturbs others.
Response times are long, so operators wait to see the effect of a move.
Product quality or safety limits cap how hard the unit can be pushed.
Feed composition or rate changes often.
Energy-intensive equipment such as furnaces, compressors, or reboilers sets the cost of operation.
Operating limits sit conservatively because operators cannot see how close the unit is to them.
Ore hardness and feed size change by the hour, and mill load swings follow.
Concentrate grade depends on reagent dosing that operators set from lab results.
What Atlas delivers in metals and mining
Quality estimation (soft sensors)
A soft sensor estimates concentrate grade or particle size between assays and is recalibrated against each new result.
Advanced regulatory control (ARC)
Ratio control on reagent dosing and level control on froth steady the circuit as feed changes.
Custom calculations
Calculated mill load and residence time give the controller limits it can honor.
Monitoring and diagnostics
CLPM ranks loops by time in manual, oscillation, and valve health, including valves in abrasive service.
Atlas Advisor™
Where deployed, Atlas Advisor™ correlates APC, CLPM, and historian signals to find the root cause of instability. When a change in ore or feed blend shifts circuit behavior, it helps trace the effect back to the loops, models, and constraints involved. It connects to the plant historian through standard interfaces and works inside your existing network security architecture.
Lifecycle and performance services
Remote Resident™ rechecks models when the ore body or feed blend changes.
How an engagement works in metals and mining.
assessment starts with the circuit where ore variability costs the most throughput or recovery.
Assessment
A Plant Performance Scan (2 to 4 hours, remote, no cost) scores the unit. A Plant Audit (2 to 4 days onsite) adds a financial estimate. You provide engineer time and recent operating data. Atlas provides the score, findings, and loss estimate.
Step testing and modeling
Atlas designs and runs step tests in live operation, then builds or recalibrates the models. You provide operations access and test windows. Atlas provides test design, analysis, and models.
Commissioning
Atlas commissions the controller or soft sensor with your operators and validates it in live operation. You provide operator and engineering time and DCS integration support. Atlas provides tuning, validation, and handover.
Performance monitoring
Control Loop Performance Monitoring (CLPM) tracks loop and controller health against live data. A 90-day pilot on an agreed set of loops carries no fee.
Ongoing support
Remote Resident™ keeps models, constraints, and loops aligned as conditions change.
Frequently asked questions
How does APC improve grinding circuit performance?
APC keeps mill power, load, feed rate, and water addition coordinated so the circuit holds a stable particle size at higher throughput. It manages interactions between the mill, sump, and cyclones that single loops cannot. Atlas restores the models and constraint limits when ore changes shift mill behavior.
What is expert control compared with MPC in mineral processing?
Expert control applies rules that mimic operator decisions, which suits stable, well-understood behavior. MPC uses a multivariable model to predict and coordinate several variables against constraints. Many circuits use both. Atlas reviews which approach fits each circuit and restores whichever is in place.
How does APC improve flotation recovery?
APC coordinates reagent dosing, pH, froth level, and air rate to hold recovery and concentrate grade as feed changes. Soft sensors can estimate grade between assays, so control responds to a reading available more often than lab results.
Which mineral processing units benefit most from APC?
SAG and ball mills, flotation circuits, furnaces and kilns, and leach and thickener circuits. Each has interacting variables and feed variability that a coordinated controller can absorb.
What does Atlas need to start?
A process or control engineer for a 2 to 4 hour Plant Performance Scan, a screen share of live control behavior, and recent operating data such as historian and alarm records. There is no fee and no purchase order for the Scan.
Does Atlas replace our existing control system?
No. Atlas is vendor-neutral and works inside the control systems you already run. It does not replace DCS or APC infrastructure.
Mineral Processing Advanced Process Control
Mineral processing advanced process control (APC) stabilizes grinding mills, flotation circuits, furnaces, and leach circuits so throughput and recovery hold as ore and feed change. Atlas Prediction Control restores and sustains APC performance inside the control systems you already run.
Request a Plant Performance Scan