CaO-SiO2-Al2O3-Na2O-MgO系模铸保护渣微观结构解析

doi:10.12068/j.issn.1005-3026.2023.04.008

东北大学学报（自然科学版） ›› 2023, Vol. 44 ›› Issue (4): 517-523.DOI: 10.12068/j.issn.1005-3026.2023.04.008

CaO-SiO₂-Al₂O₃-Na₂O-MgO系模铸保护渣微观结构解析

王震^1,2，姜茂发^1,2，刘承军^1,2，闵义^1,2,3

(1. 多金属共生矿生态化冶金教育部重点实验室，辽宁沈阳110819；2. 东北大学冶金学院，辽宁沈阳110819； 3. 海洋装备用金属材料及其应用国家重点实验室，辽宁鞍山114021)

发布日期:2023-04-27
通讯作者: 王震
作者简介:王震(1998-)，男，河北张家口人，东北大学硕士研究生；姜茂发(1955-)，男，山东栖霞人，东北大学教授，博士生导师；刘承军(1974-)，男，河南获嘉人，东北大学教授，博士生导师；闵义(1972-)，男，辽宁海城人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51974075).

Microstructure Analysis of Mold Flux of Cao-SiO₂-Al₂O₃-Na₂O-MgO System for Ingot Casting

WANG Zhen^1,2， JIANG Mao-fa^1,2， LIU Cheng-jun^1,2， MIN Yi^1,2,3

1. Key Laboratory for Ecological Metallurgy of Multimetallic Ministry

Published:2023-04-27
Contact: MIN Yi
About author:-
Supported by:
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摘要/Abstract

摘要： 为明晰化学成分变化对模铸保护渣物性的影响机制，采用Raman光谱对CaO-SiO₂-Al₂O₃-Na₂O-MgO系熔融模铸保护渣的微观结构进行了解析.熔体结构解析结果表明，熔渣中存在Q⁰_Si，Q¹_Si，Q²_Si，Q³_Si，Q⁴_Si五种硅氧四面体结构和Q²_Al，Q³_Al，Q⁴_Al三种铝氧四面体结构，随着碱度升高和Al₂O₃质量分数减小，高聚合度四面体结构向低聚合度转变，熔渣非桥氧数增多，聚合程度降低.物理性质测试结果表明，黏度随Al₂O₃质量分数增大而升高，随碱度的升高而降低；表面张力随Al₂O₃质量分数的增大而减小，随碱度的升高而增大，这与熔渣微观结构转变行为相符.探讨了渣金界面反应对模铸保护渣微观结构、物理性质及卷渣行为的影响.

关键词: 保护渣；模铸；微观结构；拉曼光谱；物理性质

Abstract: In order to clarify the influence mechanism of chemical composition change on physical properties of mold flux for ingot casting， the microstructure of CaO-SiO₂-Al₂O₃-Na₂O-MgO system slags were analyzed via Raman spectroscopy. The melt structure analysis results showed that there are five silicon oxygen tetrahedral structures Q⁰_Si，Q¹_Si，Q²_Si，Q³_Si and Q⁴_Si and three aluminum oxygen tetrahedral structures Q²_Al，Q³_Al and Q⁴_Al in the slag. With the increase of basicity and the decrease of Al₂O₃ mass fraction， the tetrahedral structure with high degree of polymerization changes to low degree of polymerization， the number of non bridging oxygen in the slag increases and the degree of polymerization decreases. The physical property test results showed that the viscosity increases with the increase of Al₂O₃ mass fraction and decreases with the increase of basicity. The surface tension decreases with the increase of Al₂O₃ mass fraction and increases with the increase of basicity， which is consistent with the microstructure transformation behavior of slag. The effects of slag metal interfacial reaction on the microstructure， physical properties and behavior of slag entrapment are discussed.

Key words: mold flux; ingot casting; microstructure; Raman spectrum; physical property

中图分类号:

王震，姜茂发，刘承军，闵义. CaO-SiO₂-Al₂O₃-Na₂O-MgO系模铸保护渣微观结构解析[J]. 东北大学学报（自然科学版）, 2023, 44(4): 517-523.

WANG Zhen， JIANG Mao-fa， LIU Cheng-jun， MIN Yi. Microstructure Analysis of Mold Flux of Cao-SiO₂-Al₂O₃-Na₂O-MgO System for Ingot Casting[J]. Journal of Northeastern University(Natural Science), 2023, 44(4): 517-523.

参考文献

[1]李阳，杜鹏飞，姜周华，等.稀土对含铜锡铁素体不锈钢中非金属夹杂物的影响［J］.钢铁，2018，53(10):32-37.(Li Yang，Du Peng-fei，Jiang Zhou-hua，et al.Effect of rare earth on non-metallic inclusions in copper tin ferritic stainless steel［J］.Iron and Steel，2018，53(10):32-37.)
[2]赵凤光，杨吉春，朱梅，等.稀土镁复合处理对X70管线钢组织和性能的影响［J］.内蒙古科技大学学报，2009，28(1):16-19.(Zhao Feng-guang，Yang Ji-chun，Zhu Mei，et al.Effect of rare earth magnesium composite treatment on microstructure and properties of X70 pipeline steel［J］.Journal of Inner Mongolia University of Science and Technology，2009，28(1):16-19.)
[3]沈春飞，蒋兴元，李阳，等.Mg处理钢生成细小尖晶石夹杂物的研究［J］.炼钢，2009，25(5):52-54. (Shen Chun-fei，Jiang Xing-yuan，Li Yang，et al.Study on the formation of fine spinel inclusions in Mg treated steel［J］.Steelmaking，2009，25(5):52-54.)
[4]刘承军，孙丽枫，王德永，等.综合碱度对连铸保护渣黏性特征的影响［J］.东北大学学报(自然科学版)，2006，27(7):782-785.(Liu Cheng-jun，Sun Li-feng，Wang De-yong，et al.Effect of BI on viscous characteristics of mold powder［J］.Journal of Northeastern University(Natural Science)，2006，27(7):782-785.)
[5]莫嵘臻，张立峰，任英，等.高铝钢用低反应型保护渣成分对其黏度的影响［J］.钢铁研究学报，2021，33(8):695-708.(Mo Rong-zhen，Zhang Li-feng，Ren Ying，et al.Review on effect of composition on viscosity of low-reactive mold flux for high-Al steel［J］.Journal of Iron and Steel Research，2021，33(8):695-708.)
[6]Sukenaga S，Haruki S，Nomoto Y，et al.Density and surface tension of CaO-SiO₂-Al₂O₃-R₂O (R=Li，Na，K) melts［J］.ISIJ International，2011，51(8):1285-1289.
[7]Min D J，Tsukihashi F.Recent advances in understanding physical properties of metallurgical slags［J］.Metals and Materials International，2017，23(1):1-19.
[8]Wang Z，Sohn I.Effect of substituting CaO with BaO on the viscosity and structure of CaO-BaO-SiO₂-MgO-Al₂O₃ slags［J］.Journal of The American Ceramic Society，2018，101(9):4285-4296.
[9]Kim T S，Park J H.Viscosity-structure relationship of alkaline earth silicate melts containing manganese oxide and calcium fluoride［J］.Journal of The American Ceramic Society，2019，102(8):4943-4955.
[10]Qi J，Liu C，Zhang C，et al.Effect of Ce₂O₃ on structure，viscosity，and crystalline phase of CaO-Al₂O₃-Li₂O-Ce₂O₃ slags［J］.Metallurgical and Materials Transactions B，2017，48(1):11-16.
[11]Kim T S，Park J H.Viscosity-structure relationship of CaO-Al₂O₃-FetO-SiO₂-MgO Ruhrstahl-Heraeus (RH) refining slags［J］.ISIJ International，2021，61(3):724-733.
[12]Wang Y，Zhang R，Zhao X，et al.Structural transformation of molten CaO-SiO₂-Al₂O₃-Fe_○xO slags during secondary refining of steels［J］.ISIJ International，2020，60(2):220-225.
[13]Shen X，Chen M，Wang N，et al.Viscosity property and melt structure of CaO-MgO-SiO₂-Al₂O₃-FeO slag system［J］.ISIJ International，2019，59(1):9-15.
[14]Feng C，Tang J，Gao L，et al.Effects of CaO/SiO₂ on viscous behaviors and structure of CaO-SiO₂-11.00wt%MgO-11.00wt%Al₂O₃-43.00wt%TiO₂ slag systems［J］.ISIJ International，2019，59(1):31-38.
[15]Li Q，Gao J，Zhang Y，et al.Viscosity measurement and structure analysis of Cr₂O₃-bearing CaO-SiO₂-MgO-Al₂O₃ slags［J］.Metals and Materials International，2016，48(1):346-356.
[16]Mcmillan P F，Wolf G H，Poe B T.Vibrational spectroscopy of silicate liquids and glasses ［J］.Chemical Geology，1995，96(3):351-366.
[17]Sen S，Youngman R E.High-resolution multinuclear NMR structural study of binary aluminosilicate and other related glasses［J］.The Journal of Physical Chemistry B，2004，108(23):7557-7564.
[18]Wu Y Q，Jiang G C，You J L，et al.Raman scattering coefficient of symmetrical stretching mode of silicate melt units［J］.Acta Physica Sinica，2005，54(2):961-966.
[19]Zhang R，Wang Z，Meng Y，et al.Quantitative insight into aluminum structures in CaO-Al₂O₃-SiO₂ system via-Raman and 27Al MAS-NMR spectroscopies［J］.Journal of Non-Crystalline Solids，2021，573(1):121116.
[20]Zhang G H，Chou K C.Influence of Al₂O₃/SiO₂ ratio on viscosities of CaO-Al₂O₃-SiO₂ melt［J］.ISIJ International，2013，53(1):177-180.
[21]Kim T S，Park J H.Structure-viscosity relationship of low-silica calcium aluminosilica melts［J］.ISIJ International，2014，54(9):2031-2038.
[22]Gao Q，Min Y，Jiang M.The temperature and structure dependence of surface tension of CaO-SiO₂-Na₂O-CaF₂ mold fluxes［J］.Metallurgical and Materials Transactions B，2018，49(3):1302-1310.
[23]Sukenaga S，Higo T，Shibata H，et al.Effect of CaO/SiO₂ ratio on surface tension of CaO-SiO₂-Al₂O₃-MgO melts［J］.ISIJ International，2015，55(6):1299-1304.

CaO-SiO₂-Al₂O₃-Na₂O-MgO系模铸保护渣微观结构解析

Microstructure Analysis of Mold Flux of Cao-SiO₂-Al₂O₃-Na₂O-MgO System for Ingot Casting

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