The effects of the application of iron coke in hydrogen-rich blast furnace atmosphere on the softening and melting performance of burden were studied.The results indicated that with the increase in hydrogen content, the cohesive zone of mixed burden became narrower and the permeability of charge was improved, and the suitable hydrogen content was 10vol.-%. The application of iron coke could promote the iron ore reduction and carburizing of iron, decrease the melting temperature by 1–10°C, decrease the dripping temperature by 5–16°C, narrow the cohesive zone, improve the air permeability with S value decrease of 3.19–13.87 kPa °C, and reduce the dissolution loss of coke and ensure the skeleton function of coke. The suitable burden structure was confirmed as follows, i.e. the ratio of pellets and sinter is 4:6, and the ratio of iron coke and coke is 2:8.
Get full access to this article
View all access options for this article.
References
1.
RingMJLindnerDCrossEFet al.Causes of the global warming observed since the 19th century. Atmos Clim Sci. 2012;2(4):401–415.
2.
TangJChuMSLiFet al.Development and progress on hydrogen metallurgy. Int J Miner Metall Mater. 2020;27(6):713–723.
3.
ShangguanFQZhangCXHuCQet al.Estimation of CO2 emission in Chinese steel industry. China Metall. 2010;20(5):37–42.
4.
SunMMNingXYZhangJLet al.Research status and progress of energy saving and emission reduction technology for ironmaking. China Metall. 2018;28(3):1–8.
5.
YilmazCWendelstorfJTurekT.Modeling and simulation of hydrogen injection into a blast furnace to reduce carbon dioxide emissions. J Cleaner Prod. 2017;154(3):488–501.
6.
ChengXM.Experimental study on the effect of ferro-coke and iron ores mixing charging on primary slag formation in the blast furnace. Wuhan: Wuhan University of Science and Technology; 2014.
7.
NomuraSTerashimaHSatoEet al.Some fundamental aspects of highly reactiveiron coke production. ISIJ Int. 2007;47(6):823–830.
8.
TakashiAKiyoshiFHidekazuF.Development of carbon iron composite process. JFE Techn Rep. 2009;13:1–6.
9.
GrigoreMSakurovsRJFrenchDH.Influence of mineral matter on coke reactivity with carbon dioxide. ISIJ Int. 2006;46(4):503–512.
10.
NishiokaKOshimaHSugiyamaIet al.Development of theinnovative coke making process (SCOPE 21) for the 21st century. Tetsuto Hogan. 2004;90(9):17–21.
11.
BiXGMaYRLiPet al.Effect of iron coke mixed charging on agglomerates reduction behavior. Iron Steel. 2014;49(11):9–13.
12.
BaoJWChuMSLiuZGet al.Research progress on preparation and application of iron coke in blast furnace. Iron Steel. 2020;55(8):38–46.
13.
WangHTChuMSZhaoWet al.Fundamental research on iron coke hot briquette – a new type charge used in blast furnace[J]. Ironmak Steelmak. 2016;43(8):571–580.
14.
WangHTChuMSYingZWet al.Current status on ferro coke technology development. Sinter Pellet. 2017;42(4):44–53.
15.
WangHTChuMSZhaoWet al.Influence of iron ore addition on metallurgicalreaction behavior of iron coke hot briquette. Metall Mater Trans B Process Metall Mater Process Sci. 2019;50(1):324–336.
16.
ChengXMBiXGMaYRet al. Experimental study on the effect of ferro-coke mixing charging on primary slag formation in blast furnace. Proceedings of the 9th China Steel Conference(CSM Biennial Conference); 2013. p. 1–7.
17.
LiP.Fundamental research on properties of highly reactive ferro-coke and its application in blast furnace. Wuhan: Wuhan University of Science and ‘Technology; 2016.
18.
WuY.Research on coupling reaction of coke gasification and iron ore reduction under the condition of rich hydrogen. Ma'anshan: Anhui University of Technology; 2018.
19.
WuSLTuoBYZhangLHet al.Softening-melting dropping behavior of pre-reduction iron-bearing burden in blast furnace. Iron Steel. 2013;48(5):11–16.
20.
HuangXH.Principles of iron and steel metallurgy (3rd ed.). Beijing: Metallurgical Industry Press; 2000.
21.
GaoZ.Study on charge assimilation reaction in high temperature area of BF. Tangshan: Hebei Polytechnic University; 2009.
22.
YangGQZhangJLChenYXet al.Influence of hydrogen content of bosh gas on softening-melting property of iron-bearing burden material. Iron Steel. 2012;47(9):14–18.
23.
YanCJLiFMQieYNet al.Effect of hydrogen content of bosh gas on iron ore dropping process. J Iron Steel Res. 2017;29(6):441–446.
24.
FittererCHertyGR.The physical chemistry of steelmaking. New York: John Wiley; 1958.
25.
ShinSMJungSM.Gasification effect of metallurgical coke with CO2 and H2O on the porosity and macrostrength in the temperature range of 1100 to 1500 °C. Energy Fuels. 2015;29(10):6851.
26.
YuSC.Research on gasification of coke with H2O under alkali condition. Ma'anshan: Anhui University of Technology; 2017.
27.
YuWHHeQFanFLet al.Characteristics of sintering of Baima V-Ti-bearing magnetite concentrate. Iron Steel Vanadium Titanium. 2000;21(1):24–28.
28.
NaritaKMaekawaMShigakiIet al.On the permeability resistance of pellets containing MgO in the softening and melting zone of blast furnace. Trans ISIJ. 1978;18(11):712–720.
