Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO-SiO2-FeOx-MgO Slag

doi:10.3390/ma13051214

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	Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO-SiO2-FeOx-MgO Slag
	Chong, Junkai; Shen, Yingying; Yang, Peng; Tian, Jianke; Zhang, Wenjuan; Tang, Xingchang; Du, Xueyan
刊名	MATERIALS
	2020-03
卷号	13 期号:5
关键词	melting characteristics viscosity B2O3 break temperature CaO-SiO2-FeOx-MgO-B2O3 slag system
DOI	10.3390/ma13051214
英文摘要	In order to reduce the amount of fluorite during the steelmaking process for environmental protection, it is essential to investigate the fluorine-free slag system. Thus, high-basicity CaO-SiO2-FeOx-MgO slag with B2O3 content from 0% to 15% was designed, and its melting characteristics and viscosity were investigated. The influence of B2O3 content on the phase diagram of the slag system was calculated using FactSage 7.3, and the break temperature was determined from the curves of temperature-dependent viscosity. The results show that, with the increase in B2O3 content, the melting characteristics of the CaO-SiO2-FeOx-MgO/B2O3 slag system, including liquidus temperature, flow temperature, softening temperature, and hemispheric temperature, all decreased; the main phase of the slag system transformed from Ca2SiO4 into borosilicate, and finally into borate; the viscous flow activation energy reduced from 690 kJ to 130 kJ; the break temperature reduced from 1590 degrees C to 1160 degrees C. Furthermore, the melting characteristics and the break temperature of the slag system with 5% and 8% B2O3 content were found to be the closest to the values of fluorine-containing steel slag.
资助项目	National Natural Science Foundation[51904139] ; Innovation Ability Improvement Project of Universities in Gansu Province[2019A-029]
WOS研究方向	Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000524060200192
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/64230]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院研究生院
通讯作者	Du, Xueyan
作者单位	Lanzhou Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Chong, Junkai,Shen, Yingying,Yang, Peng,et al. Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO-SiO2-FeOx-MgO Slag[J]. MATERIALS,2020,13(5).
APA	Chong, Junkai.,Shen, Yingying.,Yang, Peng.,Tian, Jianke.,Zhang, Wenjuan.,...&Du, Xueyan.(2020).Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO-SiO2-FeOx-MgO Slag.MATERIALS,13(5).
MLA	Chong, Junkai,et al."Effects of B2O3 on Melting Characteristics and Temperature-Dependent Viscosity of High-Basicity CaO-SiO2-FeOx-MgO Slag".MATERIALS 13.5(2020).