Prediction model of sulphur distribution ratio between CaO-FeO-Fe2O3-Al2O3-P2O5 slags and liquid iron over large variation range of oxygen potential during secondary refining process of molten steel based on ion and molecule coexistence theory

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	Prediction model of sulphur distribution ratio between CaO-FeO-Fe2O3-Al2O3-P2O5 slags and liquid iron over large variation range of oxygen potential during secondary refining process of molten steel based on ion and molecule coexistence theory
	Yang, X. M.1; Li, J. Y.1,2; Zhang, M.1,3; Zhang, J.2
刊名	IRONMAKING & STEELMAKING
	2016
卷号	43 期号:1 页码:39-55
关键词	Sulphur distribution ratio Desulphurisation reaction mechanism CaO-FeO-Fe2O3-Al2O3-P2O5 slags Thermodynamic model Mass action concentration Ion and molecule coexistence theory Structural units Ion couples Oxygen potential Secondary refining of molten steel
ISSN号	0301-9233
通讯作者	Yang, XM (reprint author), Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China.
英文摘要	A thermodynamic model for predicting sulphur distribution ratio LS between CaO-FeO-Fe2O3Al2O3-P2O5 slags and liquid iron, i.e. the ion and molecule coexistence theory (IMCT)-L-S model, has been developed for slags in a large variation range of slag oxidisation ability based on the IMCT. The developed IMCT-LS model has been verified with measured data of oxygen, phosphorus and sulphur distribution equilibria berween the slags and liquid irpn from the literature. The results indicate that the desulphurisation reaction is mainly controlled by reaction (CaO)+ [S] = (CaS) + [O] in the reducing zone with the optimised standard molar Gibbs free energy change of Delta(r)G(m,cas)(Theta)= 147023.63-227.94T (J mol(-1) ); the desulphurisation reaction is dominated by reaction (FeO) + [S] = (FeS) + [O] in the oxidising zone with the reported standard molar Gibbs free energy change of Delta(r)G(m,Fas)(Theta) = 115526 - 33.35T (J mol(-1)). The influence of CaO on the desulphurisation ability of the slags can be counteracted by that of FeO because higher CaO content corresponds to lower FeO content in the slags. An asymmetric V type relationship between sulphur distribution ratio L-S and the mass action concentration ratio N-Fe2O3/NCaO or N-Fe2O3.Fe2O3/NCaO or N-FeO/N-CaO, or the mass percentage ratio (% FeO)/(% CaO) or (% Fe2O3)/(% CaO) or (% FeO)/(% CaO) or the simplified complex basicity (% CaO)/[(% Al2O3) + (% P2O5)] or optical basicity can be established for the slags equilibrated with liquid iron in a temperature range from 1811 to 1927K (1538 to 16548 degrees C). The abovementioned mass action concentration ratios or mass percentage ratios of various iron oxides to basic oxide CaO can be recommended to represent the comprehensive effect of iron oxides Fe-O and basic oxide CaO on desulphurisation ability of the slags.
学科主题	Metallurgy & Metallurgical Engineering ; Metallurgy & Metallurgical Engineering
WOS标题词	Science & Technology ; Technology
类目[WOS]	Metallurgy & Metallurgical Engineering
研究领域[WOS]	Metallurgy & Metallurgical Engineering
关键词[WOS]	FETO-(CAO+MGO)-(SIO2+P2O5) PHOSPHATE SLAGS ; CAO-SIO2-MGO-AL2O3 IRONMAKING SLAGS ; BLAST-FURNACE SLAGS ; LIME-BASED FLUX ; SULFIDE CAPACITIES ; HOT METAL ; PIG-IRON ; SODA ASH ; SIMULTANEOUS DEPHOSPHORIZATION ; SIMULTANEOUS DESULFURIZATION
收录类别	SCI
原文出处	TAYLOR & FRANCIS LTD
语种	英语
WOS记录号	WOS:000369983200006
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/20696]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China 3.China Met Grp Corp, Beijing Met Equipment Res Design & Inst Co Ltd, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Yang, X. M.,Li, J. Y.,Zhang, M.,et al. Prediction model of sulphur distribution ratio between CaO-FeO-Fe2O3-Al2O3-P2O5 slags and liquid iron over large variation range of oxygen potential during secondary refining process of molten steel based on ion and molecule coexistence theory[J]. IRONMAKING & STEELMAKING,2016,43(1):39-55.
APA	Yang, X. M.,Li, J. Y.,Zhang, M.,&Zhang, J..(2016).Prediction model of sulphur distribution ratio between CaO-FeO-Fe2O3-Al2O3-P2O5 slags and liquid iron over large variation range of oxygen potential during secondary refining process of molten steel based on ion and molecule coexistence theory.IRONMAKING & STEELMAKING,43(1),39-55.
MLA	Yang, X. M.,et al."Prediction model of sulphur distribution ratio between CaO-FeO-Fe2O3-Al2O3-P2O5 slags and liquid iron over large variation range of oxygen potential during secondary refining process of molten steel based on ion and molecule coexistence theory".IRONMAKING & STEELMAKING 43.1(2016):39-55.