Advanced Pulverized Coal Injection Technology and Blast Furnace Operation (eBook)
324 Seiten
Elsevier Science (Verlag)
978-0-08-054635-3 (ISBN)
The Committee of Pulverized Coal Combustion and In-Furnace Reaction in BF was set up in 1993 as a cooperative research of the Japan Society for the Promotion of Science (JSPS) and the Iron and Steel Institute (ISIJ) to evaluate research initiative into this problem.
This book reports on the JSPS/ISIJ Committee's activities and describes the interpretation of findings drawn from combustion experiments and the results of live furnace applications, and furnace performance.
In order to reduce the cost of running blast furnaces (BFs), injected pulverized coal is used rather than coke to fire BFs. As a result of this, unburned fine materials are blown with the gas into the bosh and dead man areas with possible detrimental effects on gas flow and permeability of the coke column. The capacity of the furnace to consume these particles by solution loss is probably one of the limitations to coal injection. It is, therefore, important to understand the physicochemical and aerodynamic behaviour of fines including the change of in-furnace phenomena.The Committee of Pulverized Coal Combustion and In-Furnace Reaction in BF was set up in 1993 as a cooperative research of the Japan Society for the Promotion of Science (JSPS) and the Iron and Steel Institute (ISIJ) to evaluate research initiative into this problem.This book reports on the JSPS/ISIJ Committee's activities and describes the interpretation of findings drawn from combustion experiments and the results of live furnace applications, and furnace performance.
Cover 1
Contents 10
Preface 8
Chapter 1. Introduction-High rate PCI operation in Japan 18
1.1 Outline of high rate PCI operation in Japan 18
1.2 Actual situation of high rate PCI 22
1.3 Subjects on high rate PCI 27
REFERENCES 31
Chapter 2. characteristics of pulverized coal combustion 32
2.1 Classification of coal 32
2.2 Properties 35
2.3 Processes of pulverized coal combustion 44
2.4 Combustion characteristics of a single coal particle 50
2.5 Conclusion 51
REFERENCES 51
Chapter 3. Combustion behavior of PC particle group 54
3.1 Movement of PC particle group based on direct observation 55
3.2 Combustion of PC in the blowpipe 59
3.3 Combustion mechanism of PC particle group in the blowpipe 67
3.4 Combustion of PC in the raceway 74
3.5 Conclusion 79
REFERENCES 79
Chapter 4. PC Combustion in blast furnace 80
4.1 Gas composition and temperature at the combustion zone 80
4.2 Evaluation of PC combustion efficiency 88
4.3 Control of combustibility 97
REFERENCES 99
Chapter 5. Modeling of pulverized coal combustion 100
5.1 Combustion behavior of a single pulverized coal particle 100
5.2 Formulation of unit processes 103
5.3 Coupling up unit processes and combustion field 114
5.4 Mathematical modeling of pulverized coal combustion 121
REFERENCES 133
NOMENCLATURE 136
Chapter 6. Advanced injection lances for high rate PCI 140
6.1 Key factor to design injection lance with high combustibility 140
6.2 Advanced injection lance 143
6.3 Conclusion 148
REFERENCES 149
Chapter 7. Phenomena in blast furnace with high rate PCI 150
7.1 Change in burden distribution 150
7.2 Decrease of heat flux ratio 160
7.3 Variation of gas permeability resistance 163
7.4 Variation of temperature distribution and increase of heat loss 166
7.5 Change of reactions in BF 171
7.6 Phenomena in raceway and lower part of BF 176
7.7 Conclusion 183
REFERENCES 183
Chapter 8. Generation of fine in blast furnace at high rate PCI 186
8.1 Origin of fines 186
8.2 Effect of PC combustion on fine coke generation 206
8.3 Transportation and accumulation of fine 216
8.4 Consumption of fine in blast furnace 227
APPENDIX 228
REFERENCES 230
NOMENCLATURE 232
Chapter 9. Burden properties suitable for high rate PCI 234
9.1 Agglomerate properties for high rate PCI 235
9.2 Coke properties for high rate PCI 250
REFERENCES 272
Chapter 10. Upper limit of PCR 276
10.1 Replacement ratio of coke to PC 276
10.2 Upper limit of PCR 290
10.3 Summary 313
REFERENCES 314
Index 316
| Erscheint lt. Verlag | 10.11.2000 |
|---|---|
| Sprache | englisch |
| Themenwelt | Sachbuch/Ratgeber |
| Naturwissenschaften ► Physik / Astronomie | |
| Technik ► Bergbau | |
| Technik ► Elektrotechnik / Energietechnik | |
| Wirtschaft | |
| ISBN-10 | 0-08-054635-8 / 0080546358 |
| ISBN-13 | 978-0-08-054635-3 / 9780080546353 |
| Haben Sie eine Frage zum Produkt? |
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