Froth Flotation Course

Lesson 1 • Surface Chemistry Essentials

Covers wettability, contact angle, and surface energy as the physical basis for flotation selectivity. Links molecular-level phenomena to macroscopic separation outcomes.

Lesson 2 • Introduction to Mineral Processing

Positions flotation within the broader mineral processing flowsheet and defines its economic role. Establishes context for all subsequent technical content.

Lesson 3 • Ore Mineralogy and Liberation

Introduces mineral identification, locking, and liberation as prerequisites for effective flotation. Students connect mineralogical data to expected circuit performance.

Lesson 4 • Particle-Bubble Attachment Mechanisms

Explains collision, attachment, and detachment stages that determine whether a particle reports to froth. Provides the mechanistic framework for reagent selection.

Lesson 1 • Collectors: Types and Mechanisms

Covers thiol, anionic, and cationic collectors and their selective adsorption onto mineral surfaces. Connects collector structure to flotation selectivity.

Lesson 2 • Depressants and Dispersants

Examines organic and inorganic depressants that prevent gangue or unwanted minerals from floating. Builds selectivity logic for complex ore systems.

Lesson 3 • pH Modifiers and Activators

Covers lime, soda ash, and sulfuric acid as pH regulators and metal-ion activators for surface modification. Students predict modifier effects on selectivity.

Lesson 4 • Reagent Interaction and Optimization

Addresses synergistic and antagonistic reagent interactions and systematic dosage optimisation methods. Students design reagent suites for target ore types.

Lesson 1 • Column and Pneumatic Cell Technology

Explains countercurrent flow, wash water addition, and bias in flotation columns and Jameson cells. Students evaluate when columns outperform mechanical cells.

Lesson 2 • Scale-Up from Laboratory to Plant

Addresses hydrodynamic similarity, scale-up factors, and common pitfalls when translating bench results to full-scale cells. Prepares students for pilot and plant design.

Lesson 3 • Bubble Size and Air Rate Control

Quantifies bubble size distribution, superficial gas velocity, and their effects on flotation rate. Links aeration parameters to cell performance metrics.

Lesson 4 • Mechanical Cell Fundamentals

Covers impeller-stator design, air dispersion, and mixing regimes in conventional mechanical cells. Establishes baseline for comparing alternative cell technologies.

Lesson 1 • First-Order Flotation Kinetics

Derives the first-order rate equation and its assumptions, fitting it to batch and continuous data. Provides the mathematical foundation for all circuit modelling work.

Lesson 2 • Residence Time Distribution Analysis

Uses tracer testing and RTD models to characterise mixing in operating circuits. Identifies dead zones and short-circuiting that reduce effective residence time.

Lesson 3 • Distributed Rate Constant Models

Introduces floatable and non-floatable fractions and distributed-rate models for heterogeneous ores. Improves prediction accuracy for complex, multi-mineral feeds.

Lesson 4 • Circuit Configuration and Staging

Compares rougher, scavenger, and cleaner circuit arrangements and their effect on grade-recovery curves. Students design multi-stage circuits for target specifications.

Lesson 1 • Locked Cycle and Pilot Testing

Explains locked cycle test methodology and pilot plant campaigns for simulating continuous circuit behaviour. Bridges bench results to plant-scale predictions.

Lesson 2 • Assay Methods and Mass Balancing

Covers fire assay, ICP, and XRF techniques and their application to flotation product characterisation. Students reconcile assay data through rigorous mass balance calculations.

Lesson 3 • Bench-Scale Flotation Test Design

Covers laboratory cell setup, conditioning protocols, and sampling procedures for reproducible batch tests. Provides the experimental foundation for reagent and circuit development.

Lesson 4 • Interpreting and Reporting Test Results

Trains students to critically evaluate test data quality, identify outliers, and communicate findings to technical and non-technical audiences.

Lesson 1 • Coal Flotation

Covers oily collector and frother selection for fine coal recovery and ash rejection. Connects coal surface oxidation to collector dosage requirements.

Lesson 2 • Refractory and Complex Ore Challenges

Addresses preg-robbing carbonaceous matter, fine-grained dissemination, and high-clay ores that resist standard flotation. Students develop modified circuits for difficult feeds.

Lesson 3 • Sulfide Ore Flotation

Covers copper, lead-zinc, and nickel sulfide flotation with selective depression and sequential circuits. Builds ore-specific reagent and circuit design skills.

Lesson 4 • Oxide and Mixed Ore Flotation

Addresses sulfidization, fatty acid, and chelating collector strategies for oxide copper, lead, and zinc ores. Students handle transitional ore zones with mixed mineralogy.

Lesson 1 • Automatic Control Strategies

Explains PID loops, feedforward control, and model-based advanced process control for flotation circuits. Students design control strategies that reduce grade-recovery variance.

Lesson 2 • Froth Visual Assessment

Trains operators to interpret froth colour, texture, velocity, and bubble size as real-time performance indicators. Connects visual cues to corrective actions.

Lesson 3 • Instrumentation and Online Analysers

Covers flow meters, density gauges, pH probes, and online elemental analysers used in flotation plants. Links sensor data to real-time process decisions.

Lesson 4 • Troubleshooting Common Plant Problems

Provides systematic diagnostic frameworks for low recovery, poor grade, froth collapse, and excessive entrainment. Students resolve plant upsets using root-cause analysis.

Lesson 1 • Sustainability Metrics and Reporting

Introduces energy intensity, water use, and carbon footprint metrics for flotation operations and their reporting frameworks. Students benchmark performance and identify improvement opportunities.

Lesson 2 • Reagent Toxicity and Safe Handling

Covers hazard classification, exposure limits, and safe storage and handling procedures for flotation reagents. Ensures compliance with occupational health and safety standards.

Lesson 3 • Tailings Management and Disposal

Examines tailings storage facility design, geotechnical stability, and closure planning for flotation residues. Links tailings management to long-term environmental liability.

Lesson 4 • Water Conservation and Recycling

Addresses water balance modelling, process water recycling, and treatment of flotation effluents. Students design closed-loop water circuits that minimise freshwater consumption.