The blast furnace gas separated by a membrane has a higher content of combustible components. In order to explore its secondary utilization in blast furnace production, numerical simulation is conducted by means of Fluent software, and the model is verified by experimental data. Results show that when the blast furnace gas separated by the membrane is used as pulverized coal carrier gas for blast furnace injection, the gas velocity in the furnace evidently increases, and the maximum injection velocity can reach 279 m s−1. The formed high-temperature zone is closer to the centre of the blast furnace than those in the single injection of pulverized coal and in pulverized coal injection with general blast furnace gas as a carrier gas. The maximum temperature reaches 2610 K. Moreover, the pyrolysis reaction of pulverized coal is in advance, whereas the burnout rate of pulverized coal in the raceway presents a double-peak phenomenon.
Get full access to this article
View all access options for this article.
References
1.
ZhangQGuYLTiWet al.Supply-demand forecasting model of blast furnace gas in iron & steel works and its application. J NEU (Nat Sci). 2010;31:1737–1740.
2.
WijayantaATAlamMSNakasoKJet al.Numerical study on pulverized biochar injection in blast furnace. ISIJ Int. 2014;54:1521–1529. doi: 10.2355/isijinternational.54.1521
3.
NogamiHKashiwayaYYamadaD.Simulation of blast furnace operation with intensive hydrogen injection. ISIJ Int. 2012;52:1523–1527. doi: 10.2355/isijinternational.52.1523
4.
CastroDEAraújoJA.Analysis of the combined injection of pulverized coal and charcoal into large blast furnaces. J Mater Res Technol. 2013;2:308–314. doi: 10.1016/j.jmrt.2013.06.003
5.
PoosAPonghisN.Potentials and problems of high coal injection rates. In: 49th Ironmaking Conference Proceedings; March; Detroit, United States; 1990. p. 25–28.
6.
LiYQZhangXHZhangJYet al.Numerical simulation and optimization of pulverized coal injection with enriched oxygen into blast furnace. Appl Therm Eng. 2014;67:72–76. doi: 10.1016/j.applthermaleng.2014.02.062
7.
GuMYChenGZhangMCet al.Three-dimensional simulation of the pulverized coal combustion inside blast furnace tuyere. Appl Math Model. 2010;34:35–36. doi: 10.1016/j.apm.2010.03.004
8.
ShenYSYuAB.Modelling of injecting a ternary coal blend into a model ironmaking blast furnace. Miner Eng. 2016;90:89–95. doi: 10.1016/j.mineng.2015.12.009
9.
XuYHuBS.Proper combination of oxygen enrichment percentage with large amount of coal powder injection in blast furnace. J Iron Steel Res. 2006;18:6–8. doi: 10.1016/S1006-706X(06)60033-2
10.
VuokilaAMattilaOKeiskiRLet al.Study on the heavy oil lance positioning in the blast furnace tuyere to improve combustion. ISIJ Int. 2017;57:1911–1920. doi: 10.2355/isijinternational.ISIJINT-2017-213
11.
KurunovI.The modern state of the furnace production in Russia. The 5th International Congress on the Science and Technology of Ironmaking(ICSTI’09); 2009. p. 34.
12.
FeshchenkoSAPleshkovVILizunovBNet al.Making blast-furnace smelting more efficient through the injection of heated natural gas. Metallurgist. 2007;51:605–611. doi: 10.1007/s11015-007-0110-5
13.
Abdel HalimKSAndronovVNNasrMI.Blast furnace operation with natural gas injection and minimum theoretical flame temperature. Ironmak Steelmak. 2009;36:12–18. doi: 10.1179/174328107X155240
14.
MajeskiARunstedtlerAD’AlessioJet al.Injection of pulverized coal and natural gas into blast furnaces for iron-making: lance positioning and design. ISIJ Int. 2015;55:1377–1383. doi: 10.2355/isijinternational.55.1377
15.
SilaenAKOkosunTChenYet al.Investigation of high rate natural gas injection through various lance designs in a blast furnace. In: Proceedings of AISTech 2015; Cleveland, Oh, United States; 2015.
16.
OkosunTStreetSJZhaoJet al.Influence of conveyance methods for pulverised coal injection in a blast furnace. Ironmak Steelmak. 2017;44:513–525. doi: 10.1080/03019233.2016.1217116
17.
RochaEPGuilhermeVSSazakiY.Analysis of synthetic natural gas injection into charcoal blast furnace. J Mater Res Technol. 2012;2:255–262. doi: 10.1016/j.jmrt.2013.02.015
18.
CopelandCStreetS.A practical engineering approach to improving the reliability of blast furnace tuyeres. Iron Steel Technol. 2013;10:47–62.
19.
LongHMWangHTZhaoWet al.Mathematical simulation and experimental study on coke oven gas injection aimed to low carbon blast furnace ironmaking. Ironmak Steelmak. 2016;43:450–457. doi: 10.1080/03019233.2015.1108480
20.
WangHTChuMSGuoTLet al.Mathematical simulation on blast furnace operation of coke oven gas injection in combination with top gas recycling. Steel Research Int. 2016;87:539–549. doi: 10.1002/srin.201500372
21.
YehCPDuSWTsaiCHet al.Numerical analysis of flow and combustion behavior in tuyere and raceway of blast furnace fueled with pulverized coal and recycled top gas. Energy. 2012;42:233–240. doi: 10.1016/j.energy.2012.03.065
22.
ShenYSYuABAustinPRet al.CFD study of in-furnace phenomena of pulverised coal injection in blast furnace: effects of operating conditions. Powder Technol. 2012;223:27–38. doi: 10.1016/j.powtec.2011.07.020
23.
ChenCW.;Numerical analysis for the multi-phase flow of pulverized coal injection inside blast furnace tuyere. Appl Math Model. 2005;29:871–884. doi: 10.1016/j.apm.2004.11.004
24.
LiaoJHYuABShenYS.Modelling the injection of upgraded brown coals in an ironmaking blast furnace. Powder Technol. 2017;314:550–556. doi: 10.1016/j.powtec.2016.11.005
25.
UbhayakarSKSticklerDBVon RosenbergCW.Rapid devolatilization of pulverized coal in hot combustion gases. Symp(Int) Combust. 1977;16:427–436. doi: 10.1016/S0082-0784(77)80342-1
26.
GuoYCChanCKLauKS.Numerical studies of pulverized coal combustion in a tubular coal combustor with slanted oxygen jet. Fuel. 2003;82:893–907. doi: 10.1016/S0016-2361(02)00367-8
27.
ShenYSGuoBYYuABet al.Three-dimensional modelling of coal combustion in blast furnace. ISIJ Int. 2008;48:427–436. doi: 10.2355/isijinternational.48.777
28.
ZhouZFXueQGLiCLet al.Coal flow and combustion characteristics under oxygen enrichment way of oxygen-coal double lance. Appl Therm Eng. 2017;123:1096–1105. doi: 10.1016/j.applthermaleng.2017.05.177
29.
BaumMMStreetPJ.Predicting the combustion behavior of coal particles. Combust Sci Technol. 1971;3:231–243. doi: 10.1080/00102207108952290
30.
XiangZYWangXL.Blast furnace design: theory and practice of ironmaking process design. Beijing: Metallurgical Industry Press; 2014.
31.
BurgessJJamaluddinAMcCarthyM.Pulverised coal ignition and combustion in the blast furnace tuyere zone. In: Joint Symposium of ISIJ and AIMM; Tokyo, Japan; 1983. p. 129–141.
