Colloid Chemistry in Mineral Processing (eBook)

J.S. Laskowski, J. Ralston (Herausgeber)

eBook Download: PDF

2015 | 1. Auflage
451 Seiten
Elsevier Science (Verlag)
978-1-4832-9091-1 (ISBN)

Infos

Within this volume is a thorough coverage of the fundamental principles embracing modern theories of colloid chemistry applied to mineral processing. It is written in respect for Dr. J.A. Kitchener, distinguished Reader in the Science of Mineral Processing in the Royal School of Mines, Imperial College, University of London (recently retired). Dr. Kitchener's expertise in colloid chemistry has led to numerous fundamental insights and practical advances in flotation, selective flocculation, and the treatment of slimes.

Colloid chemistry is inevitably involved in all aspects of mineral processing, ranging from how collectors selectively adsorb on to mineral surfaces in flotation, to the forces which control the stability of dispersions of submicron particles, as well as embracing the behaviour of hydrolyzed metal ions in solid-water slurries. The intelligent use of this information is essential in the effective design of separation processes and strategies by the mineral processor. Up to date bibliographies are included at the end of each of the 13 chapters making this volume a useful general resource for researchers, students and mineral processors.

Inhalt

Front Cover 1
Colloid Chemistry in Mineral Processing 4
Copyright Page 5
Table of Contents 12
Foreword 6
List of Contributors 10
Part 1: Fundamentals 20
Chapter 1. Minerals and surfaces 22
Foreword 22
Colloids and surfaces 23
Mineral surfaces 46
References 56
Chapter 2. Adsorption 58
Introduction 58
Thermodynamics of adsorption from solution 58
Adsorption from solution in a monolayer 67
Ion adsorption 74
Adsorption of organic molecules 88
References 111
Chapter 3. Interparticulate forces 118
Introduction 118
DLVO theoiy 119
Structural forces 125
Conclusions 134
References 134
Chapter 4. Dispersions stability and dispersing agents 136
Introduction 136
Dispersing/depressing agents in mineral processing 137
Classification of dispersing agents 138
Particle interactions in dispersed systems 144
Dispersing agents at solid/liquid interfaces 159
Stability measurements of dispersed systems 169
Industrial applications 179
References 187
Chapter 5. Static and dynamic contact angles 194
Introduction 194
Static contact angles 194
Dynamic contact angles 218
Summary 220
References 221
Chapter 6. The influence of particle size and contact angle in flotation 224
Introduction 224
Kinetic considerations in bubble-particle interaction 225
Bubble-particle aggregate stability 233
References 244
Part 2: Applications 246
Chapter 7. An introduction: physicochemical methods of separation 248
Introduction 248
General classification of separation methods 249
References 263
Chapter 8. Selective coagulation of colloidal mineral particles 266
Introduction 266
DLVO theory applied to selective coagulation 267
Selective coagulation in binary mineral mixtures 275
Latex/mineral mixtures 280
Clay mixtures 282
Natural water systems 286
Different sized particles 290
Selective coagulation of mineral slimes in magnetic separation processes 290
Selective coagulation by hydrophobic forces 295
Selective coagulation by magnetic and hydrophobic forces 296
Suspension filtration processes 296
Other examples of selective coagulation of mineral particles reported in the literature 296
Acknowledgement 298
References 298
Chapter 9. Flocculation 300
General flocculation 300
Selective flocculation 314
Acknowledgements 329
References 329
Chapter 10. Shear-flocculation 332
The shear-flocculation effect 332
Parameters affecting shear-flocculation 334
Measurement of the degree of shear-flocculation 341
Theory of shear-flocculation 343
Applications 349
Conclusions 351
References 351
Chapter 11. Coating and carrier methods for enhancing magnetic and flotation separations 354
Introduction 354
Different types of carrier and coating process 354
Forces of interaction controlling the adhesion of fines 370
Kinetic aspects 376
Final remarks 377
Appendix — List of symbols 378
References 379
Chapter 12. Oil assisted fine particle processing 384
Water/liquid hydrocarbons two phase systems 384
Competitive wetting of solid particles with immiscible liquids 396
Emulsion flotation 403
Extender and agglomerate flotations 409
Liquid phase agglomeration 410
Liquid-liquid extraction 413
Acknowledgements 414
References 414
Chapter 13. Fundamental aspects of microbubble flotation processes 418
Introduction 418
Generation and properties of microbubbles 419
The theoretical effect of bubble size on the mechanism of flotation 424
Experimental studies on flotation by microbubbles 430
Applications of microbubble flotation processes 436
The potential and future of microbubble flotation 437
References 439
Subject Index 442

Produkt-Details

• Erscheint lt. Verlag: 14.8.2015
• Sprache: englisch
• Themenwelt: Naturwissenschaften ► Chemie ► Technische Chemie
• Themenwelt: Naturwissenschaften ► Geowissenschaften ► Geologie
• Themenwelt: Naturwissenschaften ► Geowissenschaften ► Mineralogie / Paläontologie
• Themenwelt: Technik ► Bergbau
• Themenwelt: Technik ► Umwelttechnik / Biotechnologie
• Themenwelt: Wirtschaft
• ISBN-10: 1-4832-9091-3 / 1483290913
• ISBN-13: 978-1-4832-9091-1 / 9781483290911