K2O和Na2O对高Al2O3炉渣组元活度和MgO含量的影响

doi:10.13228/j.boyuan.issn0449-749x.20210414

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (3888 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要随着高品位铁矿石消耗的加快,资源逐渐趋于贫化,钢铁企业可利用的铁矿石原料逐渐向中低品位原料转变,尤其是高铝铁矿,这类原料的使用无疑会增加高炉渣中Al₂O₃质量分数,影响高炉现有的操作制度。Al₂O₃质量分数为15%～17%的高炉渣,由于Al₂O₃含量高而使高炉渣的冶金性能变差,为了保证高炉渣的冶金性能,必须在其中添加8%左右的MgO。然而,Al₂O₃含量相似的浦项钢铁的高炉渣,其MgO质量分数仅为4%左右,高炉实现了高效、稳定、顺行。因此,从高炉CaO-SiO₂-Al₂O₃-MgO四元渣系的物理化学机理出发,研究了K₂O、Na₂O对高炉渣四元渣系CaO-SiO₂-Al₂O₃-MgO中各组元活度的影响;研究了“渣-气”平衡条件下渣中碱金属氧化物和气体中碱金属的关系;计算了K₂O、Na₂O和MgO对黏度的影响。结果显示,在考虑高炉渣CaO-SiO₂-Al₂O₃-MgO中各组元活度、碱金属在渣-气间的分布和炉渣黏度的情况下,当碱金属氧化物K₂O和Na₂O存在时,可以适当减小MgO含量,并可以保证高炉渣各组元活度及炉渣黏度基本不变。这不仅有助于减少高炉原料中添加含镁熔剂、提高原料品位、高效排碱、降低碱危害、减少碳排放、延长高炉寿命及降低成本,还能促进钢铁企业实现节能减排的目标。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	王亮
	程树森
	刘朋波
	陈艳波

关键词 ： K₂O, Na₂O, 活度, 黏度, MgO, 排碱, 高炉渣

Abstract：With the acceleration of consumption of high-grade iron ore and the gradual dilution of resources, the available iron ore raw materials for iron and steel enterprises are gradually transformed into medium and low grade raw materials. Especially high alumina iron ore, the use of such raw materials will undoubtedly increase the Al₂O₃ mass percent of blast furnace slag and affect the existing operation system of blast furnace.In order to ensure the metallurgical properties of slag, about 8% MgO must be added to the blast furnace slag, which contains 15%-17% high Al₂O₃. Because of high Al₂O₃ content, the metallurgical properties of blast furnace slag become worse. However, the MgO content of POSCO′s blast furnace slag with similar mass percent of Al₂O₃ is only about 4%, but the blast furnace has achieved high efficiency, stability and smooth running. Therefore, the effects of K₂O and Na₂O on the activity of each component in the quaternary slag system CaO-SiO₂-Al₂O₃-MgO of blast furnace slag were studied based on the physical chemistry mechanism of the blast furnace CaO-SiO₂-Al₂O₃-MgO quaternary slag system. The relationship between alkali metal oxides in slag and gas under the condition of slag-gas equilibrium was studied. The effects of K₂O, Na₂O and MgO on viscosity were calculated. The results show that considering the component activity of blast furnace slag CaO-SiO₂-Al₂O₃-MgO, the distribution of alkali metals between slag and gas and the slag viscosity, the content of MgO can be reduced appropriately when the alkali metal oxides K₂O and Na₂O exist, and the component activity of blast furnace slag CaO-SiO₂-Al₂O₃-MgO and slag viscosity can be kept basically unchanged.It is not only helpful to reduce the addition of magnesium-containing flux in blast furnace raw materials, improve the grade of raw materials, discharge alkali efficiently, reduce alkali harm, reduce carbon emissions, prolong the life of blast furnace and reduce costs, but also promote the iron and steel enterprises to achieve the goal of energy saving and emission reduction.

Key words： K₂O Na₂O activity viscosity MgO dealkalization blast furnace slag

收稿日期: 2021-07-20

引用本文:

王亮, 程树森, 刘朋波, 陈艳波. K₂O和Na₂O对高Al₂O₃炉渣组元活度和MgO含量的影响[J]. 钢铁, 2022, 57(1): 48-56. WANG Liang, CHENG Shu-sen, LIU Peng-bo, CHEN Yan-bo. Effect of K₂O and Na₂O on activity of components and MgO content of high Al₂O₃ slag[J]. Iron and Steel, 2022, 57(1): 48-56.

链接本文:

http://www.chinamet.cn/Jweb_gt/CN/10.13228/j.boyuan.issn0449-749x.20210414 或 http://www.chinamet.cn/Jweb_gt/CN/Y2022/V57/I1/48

[1] 姜鑫,沈峰满,韩宏松,等. 高炉渣适宜镁铝比分段管控的分析与应用[J]. 钢铁,2019,54(10):12. (JIANG Xin,SHEN Feng-man,HAN Hong-song,et al. Analysis and application of sectional control w(MgO)/w(Al₂O₃) of in the blast furnace slag[J]. Iron and Steel,2019,54(10):12.)
[2] 李秋寒,贾雅楠,张超杰,等. CaO-SiO₂-MgO-Al₂O₃-Cr₂O₃渣系黏度结构分析及Iida模型应用[J]. 钢铁,2019,54(4):99. (LI Qiu-han,JIA Ya-nan,ZHANG Chao-jie,et al. Viscosity-structure analysis of CaO-SiO₂-MgO-Al₂O₃-Cr₂O₃ slags and application of lida model[J]. Iron and Steel,2019,54(4):99.)
[3] 沈峰满. 高Al₂O₃含量渣系高炉冶炼工艺探讨[J]. 鞍钢技术,2005,4(6):1. (SHEN Feng-man. Discussion on BF operation with high Al₂O₃ slag[J]. Angang Technology,2005,4(6):1.)
[4] 刘竹林,王建丽,李永清.炼铁理论与工艺[M].北京:化学工业出版社,2009. (LIU Zhu-lin,WANG Jian-li,LI Yong-qing. Ironmaking Theory and Technology [J]. Beijing:Chemical Industry Press,2009.)
[5] 茅沈栋,杜屏. 降低MgO含量对高炉渣黏度和熔化性温度的影响[J]. 钢铁研究学报,2015,27(9):33.(MAO Shen-dong,DU Ping. Effect of reduction MgO content in BF slag on viscosity and melting temperature[J]. Journal of Iron and Steel Research,2015,27(9):33.)
[6] 许仁泽,张贺顺,张建良,等. 京唐高炉渣性能评价及低镁渣性能分析[J]. 中国冶金,2016,26(11):16.(XU Ren-ze,ZHANG He-shun,ZHANG Jian-liang,et al. Evaluation of Jingtang blast furnace slag properties and analysis of low MgO slag performance[J]. China Metallurgy,2016,26(11):16.)
[7] 欧阳坤,孔延厂,孙艳芹,等. 高炉中碱金属的研究进展[J]. 河北理工大学学报(自然科学版),2011,33(1):37. (OU YANG Kun,KONG Yan-chang,SUN Yan-qin,et al. Research development of alkali metal in blast furnace [J]. Journal of Hebei Polytechnic University (Natural Science),2011,33(1):37.)
[8] 吕庆,李福民,顾林娜,等. 含碱高炉渣排碱、脱硫能力的实验研究[J]. 东北大学学报(自然科学版),2007,4(11):1590. (LÜ Qing,LI Fu-min,GU Lin-na,et al. Experimental investigation on dealkalization and desulfurization ability of alkaliferous BF slag [J]. Journal of Northeastern University (Natural Science),2007,4(11):1590.)
[9] 张殿友,薛向欣,黄晓煜,等. 鞍钢7号高炉复合炉缸的结构特点与中修调查[J]. 东北大学学报,2000,4(5):547. (ZHANG Dian-you,XUE Xiang-xin,HUANG Xiao-yu,et al. Structure characteristics and partial relining investigation of a compound hearth[J]. Journal of Northeastern University,2000,4(5):547.)
[10] 马明鑫. 高炉含碱炉渣冶金性能的研究[D]. 唐山:河北理工大学,2006. (MA Ming-xin. Study on Metallurgical Properties of Blast Furnace Slag Containing Alkali[D]. Tangshan: Hebei Polytechnic University,2006.)
[11] 王成立,吕庆,顾林娜,等. 高炉含碱金属氧化物炉渣性能的试验研究[J]. 东北大学学报,2006,4(1):45. (WANG Cheng-li,LÜ Qing,GU Lin-na,et al. Experimental study on capability of blast furnace slag containing alkali[J]. Journal of Northeastern University,2006,4(1):45.)
[12] 杨军强,张建良,王翠,等. 氧化钾对高炉渣冶金性能的影响[J]. 钢铁研究,2016,44(5):9. (YANG Jun-qiang,ZHANG Jian-liang,WANG Cui,et al. Influence of potassium oxide on metallurgical properties of blast furnace slag[J]. Research on Iron and Steel,2016,44(5):9.)
[13] Sukenaga S,Saito N,Kawakami K,et al. Viscosities of CaO-SiO₂-Al₂O₃-(R₂O or RO) melts[J]. ISIJ International,2006,46(3):352.
[14] ZHANG G H,CHOU K C. Measuring and modeling viscosity of CaO-Al₂O₃-SiO₂(-K₂O) melt[J]. Metallurgical and Materials Transactions B,2012,43(4):841.
[15] 李扬,程树森. 高炉碱金属循环富集及炉渣排碱规律研究[C]//宝钢学术年会. 上海:中国金属学会,宝钢科协,2013:1. (LI Yang,CHENG Shu-sen. Thermodynamic analysis of dealkalization in blast furnace slag[C]//Baosteel BAC. Shanghai:The Chinese Society for Metals, Baosteel Association for Science and Technology,2013:1.)
[16] 王志宇,张建良,张邦志,等. 高镁铝高炉渣的冶金性能[J]. 中国冶金,2016,26(4):15. (WANG Zhi-yu,ZHANG Jian-liang,ZHANG Bang-zhi,et al. Metallurgical properties of blast furnace slag with higher Al₂O₃and MgO content[J]. China Metallurgy,2016,26(4):15.)
[17] 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.)
[18] 刘杰,赵东明,李建军,等. 鞍钢高炉低镁渣冶炼技术研究与应用[J]. 钢铁,2018,53(3):22. (LIU Jie,ZHAO Dong-ming,LI Jian-jun,et al. Research and application of blast furnace′s low w(MgO) slag in Anshan[J]. Iron and Steel,2018,53(3):22.)
[19] CHANG Z Y,JIAO K X,NING X J,et al. Novel approach to studying influences of Na₂O and K₂O additions on viscosity and thermodynamic properties of BF slags[J]. Metallurgical and Materials Transactions B,2019,50(3):1399.
[20] Kim W H,Sohn I,Min D J. A Study on the viscous behaviour with K₂O additions in the CaO-SiO₂-Al₂O₃-MgO-K₂O quinary slag system[J]. Steel Research International,2010,81(9):735.
[21] Kim H,Kim W H,Park J H,et al. A Study on the effect of Na₂O on the viscosity for ironmaking slags[J]. Steel Research International,2010,81(1):17.
[22] 沈峰满,温秋林,姜鑫,等. 国内外高炉炉渣(MgO)/(Al₂O₃)的对比分析[J]. 炼铁,2015,34(2):1. (SHEN Feng-man,WEN Qiu-lin,JIANG Xin,et al. Comparison of blast furnace slag (MgO)/(Al₂O₃) home and abroad[J]. Ironmaking,2015,34(2):1.)
[23] 汤登军,王云术,王燕,等. 莱钢3 200 m³高炉低(MgO)生产实践[J]. 炼铁,2015,34(2):31. (TANG Deng-jun,WANG Yun-shu,WANG Yan,et al. Production practice of low MgO of Laiwu Steel′s 3 200 m³ blast furnace[J]. Ironmaking,2015,34(2):31.)
[24] 韩宏松,沈峰满,姜鑫,等. 梅钢5号高炉高(Al₂O₃)渣降(MgO)冶炼实践[J]. 炼铁,2016,35(5):26.(HAN Hong-song,SHEN Feng-man,JIANG Xin,et al. Smelting practice of reducing MgO of high Al₂O₃slag in Mei Steel′s No.5 BF[J]. Ironmaking,2016,35(5):26.)
[25] 刘文文,齐渊洪,焦克新,等.太钢6号高炉碱金属的平衡与控制[J].中国冶金,2020,30(12):72.(LIU Wen-wen,QI Yuan-hong,JIAO Ke-xin,et al. Balance and control of alkali metal in No.6 blast furnace of TISCO[J]. China Metallurgy,2020,30(12):72.)
[26] 张世忠,高东辉,王鹏飞,等. 包钢6号高炉中钾、钠的平衡与控制[J]. 中国冶金,2019,29(3):28.(ZHANG Shi-zhong,GAO Dong-hui,WANG Peng-fei,et al. Balance and control of potassium and sodium in No.6 blast furnace of Baotou Steel[J]. China Metallurgy,2019,29(3):28.)
[27] 庞真丽,赵勇,杨晓涛,等.唐钢高炉炉渣排碱能力的研究[J]. 南方金属,2013,7(2):23.(PANG Zhen-li,ZHAO Yong,YANG Xiao-tao,et al. Study on slag′s alkali metals eduction capacity in Tangsteel Iron Making Plant[J]. Southern Metals,2013,7(2):23.)
[28] 董晓旭,张淑会,兰臣臣,等. 低钛高炉渣排碱能力研究[J]. 钢铁钒钛,2016,37(6):99.(DONG Xiao-xu,ZHANG Shu-hui,LAN Chen-chen,et al. Study on dealkalization capacity of BF slag with low titanium content[J]. Iron Steel Vanadium Titanium,2016,37(6):99.)
[29] 蒋大军,林千谷,何木光,等. MgO对烧结矿与高炉渣冶炼性能及工艺参数影响的试验[J]. 中国冶金,2010,20(1):35.(JIANG Da-jun,LIN Qian-gu,HE Mu-guang,et al. Industrial experimentation on influence of MgO on sinter and BF slag smelting properties and technical parameters[J]. China Metallurgy,2010,20(1):35.)
[30] 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.)