The reduction of FeO from iron-saturated FeO–CaO–SiO2–MgO–Al2O3–TiO2 slags by graphite has been studied under static conditions between 1473 and 1623 K. The results show that the Fe/Ti mole ratio in the sample matrix decreases with increasing time and temperature. Most of the FeO was reduced within the first 10 min at 1573 K. The degree of reduction was found to increase rapidly with increasing temperature below 1573 K and was controlled not only by the effective diffusivity of CO and FeO concentration, but also the formation of iron-titanium oxide in the sample. At the same time and temperature, the degree of reduction of FeO in Ti-bearing slag was higher than that of Ti-free slag, because TiO2 can decrease the liquidus temperature and prompt reduction of the slag.
Get full access to this article
View all access options for this article.
References
1.
ZhangLWangMY and SuiZT: ISIJ Int., 2006, 46, 458–465.
2.
LiaoJLLiJWangXD and ZhangZT: Ironmaking Steelmaking, 2012, 39, 133–139.
3.
RenSZhangJLWuLSLiuWJBaiYNXingXDSuBX and KongDW: ISIJ Int., 2012, 52, 984–991.
4.
RenSZhangJLWuLSSuBXXingXD and ZhuGY: Ironmaking Steelmaking, 2014, 41, 132–137.
5.
BorinderT and ForsellK: ISS Ironmaking Conf. Proc., 1986, 45, 13.
ZhuZZ and ZhangBH: J. Chongqing Univ. (Natural Science Edition), 1999, 22, 122–126.
8.
ShimomuraYOkamotoA and NaitoM: ‘Burden design for the blast furnace’, 114; 1984, Hamilton, McMaster University.
9.
BaoYCJiaXQ and SongGC: Iron Steel Vanadium Titanium, 1993, 14, 1–4.
10.
FuLCBiXGFengZHZhouGF and XiongW: J. Wuhan Univ. Sci. Tech. (Natural Sci. Edn), 2008, 31, 113–116.
11.
S. L. Wu, B. Y. Tuo, L. H. Zhang, J. L. Wu and Y. Sun: Iron & Steel, 2013, 48, 11–16.
12.
KanbaraKHagiwaraTShigemiAKondoAKanayamaYWakabayashiKI and HiramotoN: Trans. Iron Steel Inst. Jpn, 1977, 17, 371–380.
13.
YuZXDuHG and HanJP: Iron Steel Vanadium Titanium, 1984, 2, 27–37.
14.
SasakiMOnoKSuzukiAOkunoY and YoshizawaK: Trans. Iron Steel Inst. Jpn, 1977, 17, 391–400.
15.
KanbaraKSasakiMOkunoY and KatayamaT: ISS Ironmaking Conf. Proc., 1974, 33, 416–422.
16.
HinoMNagasakaTKatsumataAHiguchiK.-IYamaguchiK and Kon-NoN: Metall. Mater. Trans.B, 1999, 30B, 671–683.
17.
TanskanenPAHuttunenSMMannilaPH and HärkkiJJ: Ironmaking Steelmaking, 2002, 29, 281–286.
18.
ZhanX: Iron Steel Vanadium Titanium, 1984, 2, 3–15.
19.
TeasdaleSL and HayesPC: ISIJ Int., 2005, 45, 634–641.
20.
TeasdaleSL: ‘The Kinetics and Mechanisms of Char/slag Reactions Inside the Iron Blast Furnace’,PhD thesis, University of Queensland, Brisbane, Australia, 2000.
21.
TeasdaleSL and HayesPC: ISIJ Int., 2005, 45, 642–650.
22.
SarmaBCrambAW and FruehanRJ: Metall. Mater. Trans.B, 1996, 27B, 717–730.
23.
StorySRSarmaBFruehanRJCrambAW and BeltonGR: Metall. Mater. Trans.B, 1998, 29B, 929–932.
24.
SarmaB: ‘Reduction of ferrous oxide from smelting slags by solid carbon’,PhD thesis, Carnegie Mellon University, Pittsburgh, PA, USA, 1992.
25.
SeoK and FruehanRJ: ISIJ Int., 2000, 40, 7–15.
26.
FortiniOM and FruehanRJ: Metall. Mater. Trans.B, 2005, 36B, 865–872.
27.
SugataMSugiyamaT and KondoS: Trans. Iron Steel Inst. Jpn, 1974, 14, 88–95.
28.
DaviesMWHazeldeanGSF and SmithPN: Proc. Richardson Conf., 95–99; 1974, London, University of London.
29.
KrainerHBeerHP and BrandlH: Tech. Mitt. Krupp.-Forschingsber., 1966, 24, 139–147.
ZhaoBHayesPC and JakE: Metall. Mater. Trans. B, 2011, 42B, 50–67.
32.
HidayatTHayesPC and JakE: Metall. Mater. Trans. B, 2012, 43B, 27–38.
33.
PrathibhaVKarthikaSCyriacJSudarasanakumarC and UnnikrishnanNV: Mater. Lett., 2011, 65, 664–666.
34.
LiYYangYWuYWangL and LiuX: Mater. Sci. Eng. A, 2010, A527, 7132–7137.
35.
IgathinathaneCUlusoyU and PordesimoLO: Powder Technol., 2012, 215, 137–146.
36.
LiLSLiuJBWuXRRenXBingWB and WuLS: ISIJ Int., 2010, 50, 327–329.
37.
FruehanRJ: Metall. Trans. B, 1977, 8B, 279–286.
38.
OtsukaK and KuniiD: J. Chem. Eng. Jpn, 1969, 2, 46–50.
39.
DuttaSK and GhoshA: Metall. Mater. Trans. B, 1994, 25B, 15–26.
40.
ZhaoBJakE and HayesPC: ‘Fundamental studies in ironmaking slags to lower operating temperature and to recover titania from slag’, Proc. 5th Int. Cong. on ‘Science and technology of ironmaking’, Shanghai, China, October 2009, The Chinese Society for Metals, 1176–1182.
