A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition

doi:10.3390/met8121083

	A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition
	Yang, Xue Min 1; Li, Jin Yan 2; Zhang, Meng 2; Yan, Fang Jia 1; Duan, Dong Ping 1; Zhang, Jian 3
刊名	METALS
	2018-12-01
卷号	8 期号:12 页码:27
关键词	phosphate capacity sulfide capacity phosphorus distribution ratio sulfur distribution ratio evaluation of coupling relationship secondary refining process CaO-based slags
ISSN号	2075-4701
DOI	10.3390/met8121083
英文摘要	The coupling relationships between dephosphorization and desulfurization abilities or potentials for CaO-FeO-Fe2O3-Al2O3-P2O5 slags over a large variation range of slag oxidization ability during the secondary refining process of molten steel have been proposed by the present authors as log L-P + 5 log L-S or log CPO43- + log CS2- in the reducing zone and as log L-P + log L-S - 5 log N-FetO or log C-PO4(3-)+ log(CS2-) - log N-FeO in the oxidizing zone based on the ion and molecule 4 coexistence theory (IMCT). In order to further verify the validation and feasibility of the proposed coupling relationships, the effects of chemical composition of the CaO-based slags are provided. The chemical composition of slags was described by three group parameters including reaction abilities of components represented by the mass action concentrations N-i, two kinds of slag basicity as simplified complex basicity (% CaO) / [(% P2O5) + (% Al2O3)] and optical basicity Delta, and the comprehensive effect of iron oxides FetO and basic oxide CaO. Comparing with the strong effects of chemical composition of the CaO-based slags on dephosphorization and desulfurization abilities or potentials, the proposed coupling relationships have been confirmed to not only be independent of slag oxidization ability as expected but also irrelevant to the aforementioned three groups of parameters for representing the chemical composition of the CaO-based slags. Increasing temperature from 1811 to 1927 K (1538 to 1654 degrees C) can result in a decreasing tendency of the proposed coupling relationships. In terms of the proposed coupling relationships, chemical composition of slags or fluxes with assigned dephosphorization ability or potential can be theoretically designed or optimized from its desulfurization ability or potential, and vice versa. Considering the large difference of magnitude between phosphate capacity CPO43- and sulfide capacity CS2-, the proposed coupling relationships 4 between dephosphorization and desulfurization abilities for CaO-based slags are recommended to design or optimize chemical composition of slags.
WOS关键词	CAO-SIO2-MGO-AL2O3 IRONMAKING SLAGS ; SULFUR DISTRIBUTION RATIO ; LARGE VARIATION RANGE ; SULFIDE CAPACITY ; THERMODYNAMIC MODEL ; PREDICTION MODEL ; CAO-FEO-FE2O3-AL2O3-P2O5 SLAGS ; PHOSPHORUS PARTITION ; LIQUID-IRON ; HOT METAL
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000455072100107
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/27818]
专题	中国科学院过程工程研究所
通讯作者	Yang, Xue Min
作者单位	1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.China Met Ind Planning & Res Inst, Dept Met & Raw Mat, Beijing 100711, Peoples R China 3.Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Yang, Xue Min,Li, Jin Yan,Zhang, Meng,et al. A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition[J]. METALS,2018,8(12):27.
APA	Yang, Xue Min,Li, Jin Yan,Zhang, Meng,Yan, Fang Jia,Duan, Dong Ping,&Zhang, Jian.(2018).A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition.METALS,8(12),27.
MLA	Yang, Xue Min,et al."A Further Evaluation of the Coupling Relationship between Dephosphorization and Desulfurization Abilities or Potentials for CaO-based Slags: Influence of Slag Chemical Composition".METALS 8.12(2018):27.