Belt Conveying of Minerals

Belt Conveying of Minerals
اسم المؤلف
E. D. Yardley and L. R. Stace
التاريخ
18 يناير 2016
المشاهدات
التقييم
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كتاب
السيور الناقلة للمعادن
Belt Conveying of Minerals
E. D. Yardley and L. R. Stace
1 Intro duc tion 1
2 His to r y and e conomic s of conveyo r applications 4
2.1 Early appl ications of belt conveyors 4
2.2 Belt convey ors in mines 5
2.3 Belt convey ors in stone qu arries and othe r surface mines 9
2.4 Reference s 15
3 De s ign o f b el t c onve yo r s 1 ±power requirements
and belt tensions 17
3.1 Introducti on 17
3.2 Some basic considerat ions 19
3.3 Belt capac ity 21
3.4 Power requi rements 21
3.5 Belt tens ions 29
3.6 Tension changes over the belt width 39
3.7 Concluding remarks 42
3.8 Reference s 42
4 Design of belt conveyors 2 ± hardware (idlers,
structure, pulleys, drives, tensioning devices,
transfer points and belt cleaning) 44
4.1 Introducti on 44
4.2 Conveyor idlers 44
4.3 Conveyor struct ure 51
4.4 Pulleys 52
4.5 Conveyor driv es 54
4.6 Methods of tension ing belts 60
4.7 Design of transf er points 62
Contents
4.8 Belt cleaning 66
4.9 High angle conveyors 68
4.10 References 69
5 Belt constructions 71
5.1 Introduction 71
5.2 Textile carcase belts 71
5.3 Steel cord belts 78
5.4 Cable belts 82
5.5 References 83
6 Joining conveyor belts 84
6.1 Introduction 84
6.2 Mechanical fasteners 84
6.3 Spliced joints 89
6.4 Concluding remarks 93
6.5 References 94
7 Standards, test methods and their standardisation 95
7.1 Introduction 95
7.2 General remarks 95
7.3 The standardisation process 96
7.4 Specific standards and tests standardised by the
International Organisation for Standardisation (ISO) and the
European Committee for Standardisation (CEN) 98
7.5 Other tests 105
7.6 Concluding remarks 107
7.7 References 108
8 Safety considerations 1 ±fire and electrical
resistance properties of the belt conveyor 109
8.1 Introduction 109
8.2 Fire hazards 109
8.3 The Cresswell disaster 111
8.4 Early research into conveyor fires 112
8.5 Questions regarding Barclay’s approach 119
8.6 The European dimension 121
8.7 Safe enough? 125
8.8 Australian studies 128
8.9 Mid-scale galleries 133
8.10 Concluding remarks on conveyor fire safety 135
viii Contents
8.11 Electrostatic hazards 137
8.12 References 140
9 Safety considerations 2 ± nip points, stored tension,
man-riding and materials transportation on belts 142
9.1 Introduction 142
9.2 Nip point accidents 142
9.3 Stored energy 146
9.4 Man-riding 146
9.5 Materials handling by belt conveyor 150
9.6 General comments 150
9.7 References 151
10 Maintenance and monitoring 152
10.1 Introduction 152
10.2 Supply, storage and handling of belts 152
10.3 Belt tracking or training 153
10.4 Optimising belt life 154
10.5 Monitoring the condition of belts 155
10.6 References 157
11 Case histories 158
11.1 Selby mine 158
11.2 Prosper-Haniel 161
11.3 ATH Resources 162
11.4 `The biggest and the best’ 165
11.5 References 167
Appendix 1 Derivation of belt capacity 168
Appendix 2 Listing of international, European and
national standards relating to belt conveyors 171
Appendix 3 Man-riding conveyors ± pre¨ cis of conditions
set out in British Coal Corporation `Codes and
Rules Underground belt conveyors’ CR/13 180
A3.1 Introduction 180
A3.2 Clearances 180
A3.3 Key dimensions 181
A3.4 Men and minerals 181
A3.5 Inspection roles 181
Contents ix
A3.6 Boarding and alighting stations 181
A3.7 Safety devices 182
Index
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