Acid mine drainage neutralisation, flotation pH control, leach pad acid dosing, and tailings water pH compliance for mining operations worldwide.
From acid mine drainage neutralisation to flotation circuit pH control, precise acid and alkali dosing is critical for compliance and process efficiency.
AMD from sulphide ore oxidation can reach pH <2. High-volume lime or caustic soda neutralisation brings effluent to 6–9 before discharge or further treatment.
Sulphide and oxide flotation circuits require precise pH adjustment with sulphuric acid or lime to optimise mineral recovery and selectivity.
Cyanide and acid leaching of gold, copper, and uranium requires tight pH control. Sulphuric acid maintains pH 1.5–2.0 for copper; lime maintains pH 10.5+ for cyanide stability.
Process water and tailings supernatant must meet discharge pH 6–9. Automated lime or caustic dosing with online pH monitoring ensures continuous compliance.
| Application | Target pH | Reagent | Dosage Range |
|---|---|---|---|
| AMD neutralisation | 6.0 – 9.0 | Hydrated Lime / Quicklime | 2 – 20 kg/t |
| Copper Sulphide Flotation | 8.0 – 11.0 | Lime Slurry | 0.5 – 5 kg/t |
| Copper Oxide Leaching | 1.5 – 2.0 | Sulphuric Acid (98%) | 20 – 100 kg/t ore |
| Gold Cyanide Leaching | 10.5 – 11.0 | Lime / Caustic Soda | 0.3 – 2 kg/t |
| Tailings Effluent | 6.0 – 9.0 | Lime / Soda Ash | 0.1 – 2 kg/m3 |
| Process Water Recycle | 7.0 – 8.5 | CO2 or Acid | Variable |
High-capacity lime slurry preparation and dosing for AMD and flotation circuits.
Discover MoreSulphuric and hydrochloric acid dosing packages with PE tanks, containment, and metering pumps.
Discover MoreOnline pH analysers with PLC-based closed-loop control for real-time adjustment.
Discover MorePlug-and-play containerised pH neutralisation for remote mine sites and temporary operations.
Discover MorepH correction is a critical stage in wastewater and process water treatment. Incorrect pH can damage downstream biological systems, corrode pipework, violate discharge consent limits, and compromise product quality. Our dosing systems utilise flow-proportional control with automated feedback loops to maintain target pH within ±0.2 units, regardless of influent variability.
Rapid mixing and reaction kinetics ensure complete neutralisation before downstream processes.
Flow-paced and feedback-controlled dosing eliminates chemical wastage and overshoot.
Systems account for influent buffer capacity to calculate precise reagent requirements.
Automated temperature compensation ensures accurate pH measurement across seasonal variations.
| Flow Range | 0.5 – 5,000 m³/h |
| pH Setpoint Range | 4.0 – 10.5 (adjustable) |
| Control Accuracy | ±0.2 pH units |
| Response Time | <30 seconds to setpoint |
| Reagent Concentration | 10% – 98% (application specific) |
| Materials | SS316L, PVC, PVDF, PTFE, rubber-lined steel |
| Control Philosophy | Flow-paced + cascade PID feedback |
| Communication | Modbus RTU/TCP, Ethernet/IP, OPC-UA |
Quality management systems ensuring consistent design, manufacture, and commissioning.
Explosion-proof dosing skids available for Zone 1 and Zone 2 hazardous area installations.
Systems engineered to meet local discharge consent limits including pH, metals, and COD.
Food-grade acid and alkali selection prevents taint and ensures compliance with food safety standards. Automated CIP integration available.
Validated dosing systems with full IQ/OQ documentation. Hygienic design prevents biofilm formation in pure water loops.
High-purity dosing for boiler feed water and cooling tower blowdown neutralisation. Redundant pump arrangements ensure availability.
Heavy-duty construction withstands aggressive mine water chemistry. Remote telemetry enables operation at unmanned sites.
Acid mine drainage neutralisation parallels oil-gas sour-water acid management at industrial scale.
Read MoreAll pH adjustment technologies, reagents and reactor designs.
Read MoreFeedback, feed-forward and cascade control for pH dosing loops.
Read MoreRight pump for acid / caustic / lime dosing duties.
Read MoreContact Our Engineers for system design, sizing, and quotation.
Our expertise spans multiple industries with sector-specific water treatment solutions.