CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3渣系黏度结构分析及Iida模型应用
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摘要
为了实现冶炼铬铁合金过程中含铬渣系黏度的精准控制,从微观结构方面研究了碱度及Cr_2O_3质量分数变化对铬铁冶炼渣系黏度的影响并优化了Iida黏度预测模型。通过转筒法测量CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3渣系黏度,结合拉曼光谱从熔渣微观结构方面阐述了Cr_2O_3质量分数及碱度变化对CaO-SiO_2-MgO-Al_2O_3-Cr_2O_3渣系黏度的影响。结果表明,熔渣黏度与其表征聚合度的BO参数值均随Cr_2O_3质量分数的增加而升高,随二元碱度值的增大而降低,熔渣黏度与渣系聚合度变化趋势相一致。根据测量得到的含Cr_2O_3熔渣黏度数据,进一步优化了Iida黏度预测模型。经过优化后的模型计算黏度值与实际测值吻合较好,利用Iida黏度模型可在较大的温度与成分范围内进行含铬渣黏度的预测。
In order to achieve precise control of viscosities of chromium containing slags in ferrochrome process,the effects of varing basicities(the ratio of CaO to SiO_2)and Cr_2O_3 mass percent on the viscosities of the ferrochrome slags in microstructure level were investigated,and the Iida viscosity model was optimized. The viscosities of CaO-SiO_2-MgOAl_2O_3-Cr_2O_3 slags were measured by rotating cylinder method,and the structures of the slags were examined via Raman spectroscopy to explicate the effects of basicities and Cr_2O_3 mass percent on viscosities. The results show that the viscosities and the BO values of the slags both increase as the Cr_2O_3 mass percent increase,but decrease as basicities increase.The viscosities of slags have similar changing tendency with DOP. The Iida viscosity model is further optimized with the measured data. The estimated values by modified Iida model are in good consistence with measured ones,which indicate the viscosities of Cr_2O_3 containing slags can be properly predicted in a large temperature and composition ranges.
In order to achieve precise control of viscosities of chromium containing slags in ferrochrome process,the effects of varing basicities(the ratio of CaO to SiO_2)and Cr_2O_3 mass percent on the viscosities of the ferrochrome slags in microstructure level were investigated,and the Iida viscosity model was optimized. The viscosities of CaO-SiO_2-MgOAl_2O_3-Cr_2O_3 slags were measured by rotating cylinder method,and the structures of the slags were examined via Raman spectroscopy to explicate the effects of basicities and Cr_2O_3 mass percent on viscosities. The results show that the viscosities and the BO values of the slags both increase as the Cr_2O_3 mass percent increase,but decrease as basicities increase.The viscosities of slags have similar changing tendency with DOP. The Iida viscosity model is further optimized with the measured data. The estimated values by modified Iida model are in good consistence with measured ones,which indicate the viscosities of Cr_2O_3 containing slags can be properly predicted in a large temperature and composition ranges.
引文
[1]黄希枯.钢铁冶金原理[M]. 3版.北京:冶金工业出版社,2013.(HUANG Xi-hu. Principles of Steel Metallurgy[M]. 3rd ed. Beijing:Metallurgical Industry Press,2013.)
[2]王冬青,马泽军,陈辉,等.首钢A高炉炉渣降低MgO的热力学分析[J].中国冶金,2018,28(10):5.(WANG Dong-qing,MA Ze-jun,CHEN Hui,et al. Thermodynamic analysis of reducing MgO content in slag for blast furnace A in Shougang[J].China Metallurgy,2018,28(10):5.)
[3]常治宇,张建良,宁晓钧,等. MgO对低铝渣流动性的影响机理及热力学分析[J].钢铁,2018,53(7):10.(CHANG Zhi-yu,ZHANG Jian-liang,NING Xiao-jun,et al. Effect mechanism of MgO on fluidity of low aluminum slag and thermodynamic analysis[J]. Iron and Steel,2018,53(7):10.)
[4]常治宇,张建良,许仁泽,等. Al2O3对酒钢低铝渣黏度的影响及热力学分析[J].中国冶金,2018,28(8):6.(CHANG Zhiyu,ZHANG Jian-liang,XU Ren-ze,et al. Effect of Al2O3on viscosity of low alumina slags of Jiusteel and thermodynamic analysis[J]. China Metallurgy,2018,28(8):6.)
[5]朱德庆,杨聪聪,潘建,等.适用于高炉冶炼不锈钢母液的含铬炉料制备[J].钢铁,2018,53(10):16.(ZHU De-qing,YANG Cong-cong,PAN Jian,et al. Preparation of chromiumbearing agglomerates for stainless steel master alloy production in blast furnace[J]. Iron and Steel,2018,53(10):16.)
[6] Forsbacka L,Holappa L,Kondratiev A,et al. Experimental study and modelling of viscosity of chromium containing slags[J]. Steel Research International,2007,78(9):676.
[7] Kalicka Z,Kawecka-Cebula E,Pytel K,et al. Application of the Iida model for estimation of slag viscosity for Al2O3-Cr2O3-CaO-CaF2systems[J]. Archives of Metallurgy and Materials,2009,54(1):179.
[8] Forsbacka L,Holappa L,Iida T,et al. Experimental study of viscosities of selected CaO-MgO-Al2O3-SiO2slags and application of the Iida model[J]. Scandinavian Journal of Metallurgy,2003,32(5):273.
[9] Forsbacka L,Holappa L. Viscosity of CaO-CrOx-SiO2slags in a relatively high oxygen partial pressure atmosphere[J]. Scandinavian Journal of Metallurgy,2004,33(5):261.
[10] Chen M,Raghunath S,Zhao B,et al. Viscosity measurements of“FeO”-SiO2slag in equilibrium with metallic Fe[J]. Metallurgical and Materials Transactions B,2013,44(3):506.
[11] Fincham F,Richardson F D. The behaviour of sulphur in silicate and aluminate melts[J]. Proceedings of the Royal Society of London,1952,223(1152):40
[12] Stebbins J F,Xu Z. NMR evidence for excess non-bridging oxygen in an aluminosilicate glass[J]. Nature,1997,390(6655):60.
[13] JIANG G C,YOU J L. High temperature Raman spectroscopy used in the study of microstructure of silicate melts[J]. Journal of the Chinese Ceramic Society,2004,31(10):998
[14] Kim T S,Park J H. Structure-viscosity relationship of low-silica calcium aluminosilicate melts[J]. ISIJ International,2014,54(9):2031.
[15] Sohn I,Min D J. A review of the relationship between viscosity and the structure of calcium-silicate-based slags in ironmaking[J]. Steel Research International,2012,83(7):611.
[16] McMillan P F,Poe B T,Gillet P,et al. A study of SiO2glass and supercooled liquid to 1 950 K via high-temperature Raman spectroscopy[J]. Geochimica et Cosmochimica Acta,1994,58(17):3653.
[17] YOU J L,JIANG G C,HOU H Y,et al. Quantum chemistry study on superstructure and Raman spectra of binary sodium silicates[J]. Journal of Raman Spectroscopy,2005,36(3):237
[18] Yang J J,Cheng H,Martens W N,et al. Transition of synthetic chromium oxide gel to crystalline chromium oxide:A hot-stage Raman spectroscopic study[J]. Journal of Raman Spectroscopy,2011,42(5):1069.
[19] WANG L,WANG Y,WANG Q,et al. Raman structure investigations of CaO-MgO-Al2O3-SiO2-CrOxand its correlation with sulfide capacity[J]. Metallurgical and Materials Transactions B,2016,47(1):10.
[20] Mysen B O,Virgo D,Scarfe C M,et al. Viscosity and structure of iron-and aluminum-bearing calcium silicate melts at 1 atm[J]. Am Mineral,1985,70(5/6):487
[21] Iida T,Sakai H,Kita Y,et al. An equation for accurate prediction of the viscosities of blast furnace type slags from chemical composition[J]. ISIJ International,2000,40(s):S110.
[22] Mills K C. The influence of structure on the physico-chemical properties of slags[J]. ISIJ International,1993,33(1):148.
[23] LI Q H,YANG S F,ZHANG Y L,et al. Effects of MgO,Na2O,and B2O3on the viscosity and structure of Cr2O3-bearing CaOSiO2-Al2O3slags[J]. ISIJ International,2017,57(4):689.
[24]李秋寒,张延玲. Al2O3和MgO对含铬渣黏度及结构影响的研究[J].炼钢,2017(2):63.(LI Qiu-han,ZHANG Yan-ling. Effect of Al2O3and MgO on the viscosity and structure of Cr-containing slags[J]. Steelmaking,2017(2):63)
[25] LI Q H,GAO J T,ZHANG Y L,et al. Viscosity measurement and structure analysis of Cr2O3-bearing CaO-SiO2-MgO-Al2O3slags[J]. Metallurgical and Materials Transactions B,2017,48(1):346.
[2]王冬青,马泽军,陈辉,等.首钢A高炉炉渣降低MgO的热力学分析[J].中国冶金,2018,28(10):5.(WANG Dong-qing,MA Ze-jun,CHEN Hui,et al. Thermodynamic analysis of reducing MgO content in slag for blast furnace A in Shougang[J].China Metallurgy,2018,28(10):5.)
[3]常治宇,张建良,宁晓钧,等. MgO对低铝渣流动性的影响机理及热力学分析[J].钢铁,2018,53(7):10.(CHANG Zhi-yu,ZHANG Jian-liang,NING Xiao-jun,et al. Effect mechanism of MgO on fluidity of low aluminum slag and thermodynamic analysis[J]. Iron and Steel,2018,53(7):10.)
[4]常治宇,张建良,许仁泽,等. Al2O3对酒钢低铝渣黏度的影响及热力学分析[J].中国冶金,2018,28(8):6.(CHANG Zhiyu,ZHANG Jian-liang,XU Ren-ze,et al. Effect of Al2O3on viscosity of low alumina slags of Jiusteel and thermodynamic analysis[J]. China Metallurgy,2018,28(8):6.)
[5]朱德庆,杨聪聪,潘建,等.适用于高炉冶炼不锈钢母液的含铬炉料制备[J].钢铁,2018,53(10):16.(ZHU De-qing,YANG Cong-cong,PAN Jian,et al. Preparation of chromiumbearing agglomerates for stainless steel master alloy production in blast furnace[J]. Iron and Steel,2018,53(10):16.)
[6] Forsbacka L,Holappa L,Kondratiev A,et al. Experimental study and modelling of viscosity of chromium containing slags[J]. Steel Research International,2007,78(9):676.
[7] Kalicka Z,Kawecka-Cebula E,Pytel K,et al. Application of the Iida model for estimation of slag viscosity for Al2O3-Cr2O3-CaO-CaF2systems[J]. Archives of Metallurgy and Materials,2009,54(1):179.
[8] Forsbacka L,Holappa L,Iida T,et al. Experimental study of viscosities of selected CaO-MgO-Al2O3-SiO2slags and application of the Iida model[J]. Scandinavian Journal of Metallurgy,2003,32(5):273.
[9] Forsbacka L,Holappa L. Viscosity of CaO-CrOx-SiO2slags in a relatively high oxygen partial pressure atmosphere[J]. Scandinavian Journal of Metallurgy,2004,33(5):261.
[10] Chen M,Raghunath S,Zhao B,et al. Viscosity measurements of“FeO”-SiO2slag in equilibrium with metallic Fe[J]. Metallurgical and Materials Transactions B,2013,44(3):506.
[11] Fincham F,Richardson F D. The behaviour of sulphur in silicate and aluminate melts[J]. Proceedings of the Royal Society of London,1952,223(1152):40
[12] Stebbins J F,Xu Z. NMR evidence for excess non-bridging oxygen in an aluminosilicate glass[J]. Nature,1997,390(6655):60.
[13] JIANG G C,YOU J L. High temperature Raman spectroscopy used in the study of microstructure of silicate melts[J]. Journal of the Chinese Ceramic Society,2004,31(10):998
[14] Kim T S,Park J H. Structure-viscosity relationship of low-silica calcium aluminosilicate melts[J]. ISIJ International,2014,54(9):2031.
[15] Sohn I,Min D J. A review of the relationship between viscosity and the structure of calcium-silicate-based slags in ironmaking[J]. Steel Research International,2012,83(7):611.
[16] McMillan P F,Poe B T,Gillet P,et al. A study of SiO2glass and supercooled liquid to 1 950 K via high-temperature Raman spectroscopy[J]. Geochimica et Cosmochimica Acta,1994,58(17):3653.
[17] YOU J L,JIANG G C,HOU H Y,et al. Quantum chemistry study on superstructure and Raman spectra of binary sodium silicates[J]. Journal of Raman Spectroscopy,2005,36(3):237
[18] Yang J J,Cheng H,Martens W N,et al. Transition of synthetic chromium oxide gel to crystalline chromium oxide:A hot-stage Raman spectroscopic study[J]. Journal of Raman Spectroscopy,2011,42(5):1069.
[19] WANG L,WANG Y,WANG Q,et al. Raman structure investigations of CaO-MgO-Al2O3-SiO2-CrOxand its correlation with sulfide capacity[J]. Metallurgical and Materials Transactions B,2016,47(1):10.
[20] Mysen B O,Virgo D,Scarfe C M,et al. Viscosity and structure of iron-and aluminum-bearing calcium silicate melts at 1 atm[J]. Am Mineral,1985,70(5/6):487
[21] Iida T,Sakai H,Kita Y,et al. An equation for accurate prediction of the viscosities of blast furnace type slags from chemical composition[J]. ISIJ International,2000,40(s):S110.
[22] Mills K C. The influence of structure on the physico-chemical properties of slags[J]. ISIJ International,1993,33(1):148.
[23] LI Q H,YANG S F,ZHANG Y L,et al. Effects of MgO,Na2O,and B2O3on the viscosity and structure of Cr2O3-bearing CaOSiO2-Al2O3slags[J]. ISIJ International,2017,57(4):689.
[24]李秋寒,张延玲. Al2O3和MgO对含铬渣黏度及结构影响的研究[J].炼钢,2017(2):63.(LI Qiu-han,ZHANG Yan-ling. Effect of Al2O3and MgO on the viscosity and structure of Cr-containing slags[J]. Steelmaking,2017(2):63)
[25] LI Q H,GAO J T,ZHANG Y L,et al. Viscosity measurement and structure analysis of Cr2O3-bearing CaO-SiO2-MgO-Al2O3slags[J]. Metallurgical and Materials Transactions B,2017,48(1):346.