Investigation on Viscosity and Nonisothermal Crystallization Behavior of   P-Bearing Steelmaking Slags with Varying TiO2 Content

doi:10.1007/s11663-016-0825-4

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	Investigation on Viscosity and Nonisothermal Crystallization Behavior of P-Bearing Steelmaking Slags with Varying TiO2 Content
	Wang, Zhanjun ; Sun, Yongqi ; Sridrar, Seetharaman ; Zhang, Mei ; Zhang, Zuotai
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
	2017
关键词	STEEL SLAG SILICATE-GLASSES MOLD FLUXES PHOSPHORUS PHASE SYSTEM TEMPERATURE ENRICHMENT KINETICS FLUORIDE
DOI	10.1007/s11663-016-0825-4
英文摘要	The viscous flow and crystallization behavior of CaO-SiO2-MgO-Al2O3-FetO-P2O5-TiO2 steelmaking slags have been investigated over a wide range of temperatures under Ar (High purity, > 99.999 pct) atmosphere, and the relationship between viscosity and structure was determined. The results indicated that the viscosity of the slags slightly decreased with increasing TiO2 content. The constructed nonisothermal continuous cooling transformation (CCT) diagrams revealed that the addition of TiO2 lowered the crystallization temperature. This can mainly be ascribed to that addition of TiO2 promotes the formation of [TiO6]-octahedra units and, consequently, the formation of MgFe2O4-Mg2TiO4 solid solution. Moreover, the decreasing viscosity has a significant effect on enhancing the diffusion of ion units, such as Ca2+ and [TiO4]-tetrahedra, from bulk melts to the crystal-melt interface. The crystallization of CaTiO3 and CaSiTiO5 was consequently accelerated, which can improve the phosphorus content in P-enriched phase (n2CaO center dot SiO2-3CaO center dot P2O5). Finally, the nonisothermal crystallization kinetics was characterized and the activation energy for the primary crystal growth was derived such that the activation energy increases from -265.93 to -185.41 KJ center dot mol(-1) with the addition of TiO2 content, suggesting that TiO2 lowered the tendency for the slags to crystallize. (C) The Minerals, Metals & Materials Society and ASM International 2016; National Natural Science Foundation of China [51522401, 51472007, 51372019]; National High Technology Research and Development Program of China (863 Program) [2012AA06A114]; SCI(E); ARTICLE; 1; 527-537; 48
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/475534]
专题	工学院
推荐引用方式 GB/T 7714	Wang, Zhanjun,Sun, Yongqi,Sridrar, Seetharaman,et al. Investigation on Viscosity and Nonisothermal Crystallization Behavior of P-Bearing Steelmaking Slags with Varying TiO2 Content[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2017.
APA	Wang, Zhanjun,Sun, Yongqi,Sridrar, Seetharaman,Zhang, Mei,&Zhang, Zuotai.(2017).Investigation on Viscosity and Nonisothermal Crystallization Behavior of P-Bearing Steelmaking Slags with Varying TiO2 Content.METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE.
MLA	Wang, Zhanjun,et al."Investigation on Viscosity and Nonisothermal Crystallization Behavior of P-Bearing Steelmaking Slags with Varying TiO2 Content".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE (2017).