Chapter 1 General Review of Electrochemistry of Flotation of Sulphide Minerals.
1.1 Three Periods of Flotation of Sulphide Minerals
1.2 Natural Floatability and Collectorless Flotation of Sulphide Minerals
1.3 Role of Oxygen and Oxidation of Sulphide Minerals in Flotation
1.4 Interactions between Collector and Sulphide Minerals and Mixed Potential Model
1.5 Effect of Semiconductor Property of Sulphide Mineral on Its Electrochemical Behavior
1.6 Electrochemical Behaviors in Grinding System
1.7 The Purpose of This Book
Chapter 2 Natural Floatability and Collectorless Flotation of Sulphide Minerals
2.1 Crystal Structure and Natural Floatability
2.2 Collectorless Flotation
2.2.1 Effect of Pulp Potential on Flotation at Certain pH
2.2.2 Pulp Potential and pH Dependence of Collectorless Floatability
2.3 Electrochemical Equilibriums of the Surface Oxidation and Flotation of Sulphide Minerals
2.3.1 The Surface Oxidation of Sulphide Minerals and Nernst Equation
2.3.2 Electrochemical Equilibriums in Collectorless Flotation
2.3.3 Eh-pH Diagrams of Potential and pH Dependence of Flotation
2.4 Electrochemical Determination of Surface Oxidation Products of Sulphide Minerals
2.5 Surface Analysis of Oxidation of Sulphide Minerals
Chapter 3 Colleetorless Flotation in the Presence of Sodium Sulphide
3.1 Description of Behavior
3.2 Nature of Hydrophobic Entity
3.3 Surface Analysis and Sulphur-Extract
3.4 Comparison between Self-Induced and Sodium Sulphide-Induced Collectorless Flotation
Chapter 4 Collector Flotation of Sulphide Minerals
4.1 Pulp Potential Dependence of Collector Flotation and Hydrophobic Entity
4.1.1 Copper Sulphide Minerals
4.1.2 Lead Sulphide Minerals
4.1.3 Zinc Sulphide Minerals
4.1.4 Iron Sulphide Minerals
4.2 Eh-pH Diagrams for the Collector/Water/Mineral System
4.2.1 Butyl Xanthate/Water System
4.2.2 Chalcocite-Oxygen-Xanthate System
4.3 Surface Analysis
4.3.1 UV Analysis of Collector Adsorption on Sulphide Minerals
4.3.2 FTIR Analysis of Adsorption of Thio-Collectors on Sulphide Minerals
4.3.3 XPS Analysis of Collector Adsorption on Sulphide Minerals
Chapter 5 Roles of Depressants in Flotation of Sulphide Minerals
5.1 Electrochemical Depression by Hydroxyl Ion
5.1.1 Depression of Galena and Pyrite
5.1.2 Depression of Jamesonite and Pyrrhotite
5.1.3 Interracial Structure of Mineral/Solution in Different pH Modifier Solution
5.2 Depression by Hydrosulphide Ion
5.3 Electrochemical Depression by Cyanide
5.4 Depression by Hydrogen Peroxide
5.5 Depression of Marmatite and Pyrrhotite by Thio-Organic Depressants
5.6 Role of Polyhydroxyl and Poly Carboxylic Xanthate in the Flotation of Zinc-Iron Sulphide
5.6.1 Flotation Behavior of Zinc-Iron Sulphide with Polyhydroxyl and Polycarboxylic Xanthate as Depressants
5.6.2 Effect of Pulp Potential on the Flotation of Zinc-Iron Sulphide in the Presence of the Depressant
5.6.3 Adsorption of Polyhydroxyl and Polycarboxylic Xanthate on Zinc-Iron Sulphide
5.6.4 Effect of Polyhydroxyl and Polycarboxylic Xanthate on the Zeta Potential of Zinc-Iron Sulphide Minerals
5.6.5 Structure-Property Relation of Polyhydroxyl and Polycarboxylic Xanthate
Chapter 6 Electrochemistry of Activation Flotation of Sulphide Minerals
6.1 Electrochemical Mechanism of Copper Activating Sphalerite
6.2 Electrochemical Mechanism of Copper Activating Zinc-Iron Sulphide Minerals
6.2.1 Activation Flotation
6.2.2 Effect of Pulp Potential on Activation Flotation of Zinc-Iron Sulphide Minerals
6.2.3 Electrochemical Mechanism of Copper Activating Marmatite
6.2.4 Surface Analysis of Mechanism of Copper Activating Marmatite..
6.3 Activation of Copper Ion on Flotation of Zinc-Iron Sulphide Minerals in the Presence of Depressants
6.3.1 Effect of Depressant on the CuSO4 Activating Flotation of Zinc-Iron Sulphide Minerals
6.3.2 Influence of Pulp Potential on the Copper Ion Activating Flotation of Zinc-Iron Sulphide Minerals in the Presence of Depressant
6.3.3 Zeta Potential of Zinc-Iron Sulphide Minerals in the Presence of Flotation Reagents
6.4 Surface Chemistry of Activation of Lime-Depressed Pyrite
6.4.1 Activation Flotation of Lime-Depressed Pyrite
6.4.2 Solution Chemistry Studies on Activation Flotation of Lime-Depressed Pyrite
6.4.3 The Bonding of the Activator Polar Group with Surface Cation
6.4.4 Surface Analysis of Lime-Depressed Pyrite in the Presence of Activator
Chapter 7 Corrosive Electrochemistry of Oxidation-Reduction of Sulphide Minerals
7.1 Corrosive Electrochemistry
7.1.1 Concept and Significance of Mixed Potential. Corrosive Potential and Static Potential
7.1.2 The Concept of Corrosive Current and Corrosive Speed
7.1.3 The Corrosion Inhibitor. Inhibiting Corrosive Efficiency and Its Relationship with Collector Action
7.2 Self-Corrosion of Sulphide Minerals
7.3 Corrosive Electrochemistry on Surface Redox Reaction of Pyrite under Different Conditions
7.3.1 The Oxidation of Pyrite in NaOH Medium
7.3.2 Oxidation of Pyrite in Lime Medium
7.3.3 Corrosive Electrochemistry Study on Interactions between Collector and Pyrite
7.3.4 Interaction between Collector and Pyrite in High Alkaline Media
7.4 Corrosive Electrochemistry on Surface Redox Reaction of Galena under Different Conditions
7.4.1 The Oxidation of Galena in NaOH Solution
7.4.2 The Effect of Lime on the Oxidation of Galena
7.4.3 Corrosive Electrochemistry Study on Interactions between Collector and Galena
7.4.4 Interactions between Collector and Galena at High pH
7.5 Corrosive Electrochemistry on Surface Redox Reaction of Sphalerite in Different Media
7.5.1 Influence of Different pH Media on Sphalerite Oxidation
7.5.2 Inhibiting Corrosive Mechanism of Collector on Sphalerite Electrode
Chapter 8 Mechano-Electrochemical Behavior of Flotation
of Sulphide Minerals
8.1 Experiment Equipment
8.2 Mechano-Electrochemical Behavior of Pyrite in Different Grinding Media
8.3 Mechano-Electrochemistry Process of Galena in Different Grinding Media
8.4 Influence of Mechanical Force on the Electrode Process between Xanthate and Sulphide Minerals
8.5 Surface Change of Sulphide Minerals under Mechanical Force
8.5.1 Surface Change of the Pyrite under Mechanical Force
8.5.2 Surface Change of Sphalerite in Mechanical Force
Chapter 9 Molecular Orbital and Energy Band Theory Approach of Electrochemical Flotation of Sulphide Minerals
9.1 Qualitative Molecular Orbital and Band Models
9.2 Density Functional Theory Research on Oxygen Adsorption on Pyrite (100) Surface
9.2.1 Computation Methods
9.2.2 Bulk FeS2 Properties
9.2.3 Property of FeS2 (100) Surface
9.2.4 Oxygen Adsorption
9.3 Density Functional Theory Research on Activation of Sphalerite
9.3.1 Computational Methods
9.3.2 Bulk ZnS Properties
9.3.3 Relaxation and Properties of ZnS (110) Surface
9.3.4 Relaxation and Properties of ZnS (110) Surface Doped with Cu2+ and Fe2+
9.3.5 Effects of Doped Ions on Mixed Potential
9.4 The Molecular Orbital and Energy Band Discussion of Electrochemical Flotation Mechanism of Sulphide Minerals
9.4.1 Frontier Orbital of Collector and Oxygen
9.4.2 The Molecular Orbit and Energy Band Discussion of Collectorless Flotation of Galena and Pyrite
9.4.3 The Molecular Orbit and Energy Band Discussion of Collector Flotation of Galena and Pyrite
Chapter 10 Electrochemical Flotation Separation of Sulphide Minerals
10.1 Technological Factors Affecting Potential Controlled Flotation Separation of Sulphide Ores
10.1.1 Potential Modifiers
10.1.2 pH Modifier
10.1.3 Frother
10.1.4 Conditioning Time
10.1.5 Surface Pretreatment
10.1.6 Grinding Environment
10.2 Flotation Separation of Sulphide Minerals and Ores
10.2.1 Copper Sulphide Minerals and Ores
10.2.2 Lead-Zinc-Iron-Sulphide Minerals and Ores
10.3 Applications of Potential Control Flotation in Industrial Practice
10.3.1 Original Potential in Grinding Process
10.3.2 Effect of Lime Dosage on "Original Potential"
10.3.3 Coupling with Other Flotation Process Factors
10.3.4 Coupling with Reagent Schemes
10.3.5 Coupling with Flotation Circuit
10.3.6 Applications of OPCF Technology in Several Flotation Concentrators
References
Index of Terms
Index of Scholars...
