Coal Flotation and Fine Coal Utilization (eBook)

Cover 1
Contents 12
Preface 8
Chapter 1. Coal preparation 16
1.1. Unit operations 16
1.2. Coarse-coal vs . fine-coal circuits 17
1.3. Seam-to-steam strategy 20
1.4. Role of coal surface properties in fine-coal processing 22
1.5. References 23
Chapter 2. Coal characteristics related to coal preparation 24
2.1. Introduction 24
2.2. Coal classification 26
2.3. Coal petrography 26
2.4. Inorganic matter in coal 30
2.5. Sulfur in coal 32
2.6. Liberation 38
2.7. References 42
Chapter 3. Coal surface properties 46
3.1. Introduction 46
3.2. Coal surface wettability 47
3.3. Coal porosity and moisture 59
3.4. Surface components hypothesis 64
3.5. Patchwork assembly model of coal surface 66
3.6. Effect of coal rank on floatability 68
3.7. Floatability of coal macerals 69
3.8. Experimental methods of characterizing coal wettability 72
3.9. References 103
Chapter 4. Coal floatability 110
4.1. Introduction 110
4.2. Floatability 114
4.3. References 124
Chapter 5. Reagents 126
5.1. Introduction 126
5.2. Reagents 127
5.3. Reagents' mode of action 135
5.4. References 188
Chapter 6. Flotation technology 196
6.1. Introduction 196
6.2. Characteristics of coal 196
6.3. Characteristics of pulp 202
6.4. The use of reagents under industrial conditions 206
6.5. Desulfurizing flotation 208
6.6. Flocculants in coal preparation 216
6.7. Salt flotation 219
6.8. References 222
Chapter 7. Fine-coal multi-unit processing circuits 226
7.1. Flotation and gravity methods in fine-coal processing 226
7.2. Flotation circuits for difficult-to-float coals 232
7.3. Advanced coal flotation circuits 233
7.4. References 237
Chapter 8. Flotation machines 240
8.1. Introduction 240
8.2. Coal flotation versus mineral flotation 247
8.3. Classification of flotation machines 249
8.4. References 273
Chapter 9. Particle size enlargement 278
9.1. Introduction 278
9.2. Oil agglomeration 279
9.3. Flocculation 288
9.4. Pelletization 306
9.5. Briquetting 312
9.6. References 315
Chapter 10. Fine-coal utilization 322
10.1. Utilization of thermal coals and metallurgical coals 322
10.2. Fine-coal handleability 324
10.3. Spontaneous combustion of coal 331
10.4. Coal–water slurries 333
10.5. References 364
Appendix 368
Subject Index 372
Erratum 384