溶损反应前后焦炭反射率及光学组织的比较
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摘要
为了解焦炭中各显微光学组织在溶损反应中的反应行为,对不同条件下溶损反应前后焦炭的反射率及显微光学组织组成进行了分析。试验表明,焦炭的反射率指标及光学组织组成与焦炭的反应性CRI、反应后强度CSR之间存在比较好的相关性。焦炭的平均最大反射率■和光学各向异性指数Φ越高,各向同性光学组织越少,其CRI越低,CSR越高。经过1 100℃溶损反应后,焦炭的■提高,各向同性光学组织含量减少,各向异性光学组织含量增加,说明各向同性的反应性高于各向异性。溶损反应温度提高到1 300℃以后,焦炭中各向同性的溶损反应量分别为1 100℃时的1.07～3.00倍,而各向异性的溶损反应量分别为1 100℃的1.22～8.58倍,且热性能越好的焦炭各向异性反应量增加得越多。
In orde to understand the behavior of coke optical textures in the solution loss reaciton,the reflectance and optical texture content were analyzed before and after the reaction under different conditions.The reactivity index CRIand the coke strength after reaction CSR show good correlationships with coke reflectance parameters and optical textures compositions.The coke with low CRI and high CSR always presented in the higher average maximum reflectance ■,the higher optical anisotropic index Φ and the less isotropic textures content.After the solution loss reaction under1 100℃,both the values of ■ and Φ of the coke increased.The proportion of the isotropic texture in the coke reduced at the same time,which indicated the isotropic texture was more active than the anisotropic texture.As the reaction temperature was raised to 1 300℃,the solution loss of isotropic was 1.07 to 3.00 times of 1 100℃respectively,and the solution loss of anisotropic was 1.22 to 8.58 times of 1 100℃respectively.The coke with better thermal properties has more anisotropic solution loss under 1 300℃.
In orde to understand the behavior of coke optical textures in the solution loss reaciton,the reflectance and optical texture content were analyzed before and after the reaction under different conditions.The reactivity index CRIand the coke strength after reaction CSR show good correlationships with coke reflectance parameters and optical textures compositions.The coke with low CRI and high CSR always presented in the higher average maximum reflectance ■,the higher optical anisotropic index Φ and the less isotropic textures content.After the solution loss reaction under1 100℃,both the values of ■ and Φ of the coke increased.The proportion of the isotropic texture in the coke reduced at the same time,which indicated the isotropic texture was more active than the anisotropic texture.As the reaction temperature was raised to 1 300℃,the solution loss of isotropic was 1.07 to 3.00 times of 1 100℃respectively,and the solution loss of anisotropic was 1.22 to 8.58 times of 1 100℃respectively.The coke with better thermal properties has more anisotropic solution loss under 1 300℃.
引文
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[18]钱晖,谢威,夏杰,等.焦炭反射率与强度指标及反应性之间的相关性[J].钢铁,2016,51(12):15.(QIAN Hui,XIE Wei,XIA Jie,et al. Correlationship between strength index,reactivity and reflectance of coke[J]. Iron and Steel,2016,51(12):15.)
[19]谢威,夏杰,钱晖,等.冶金焦炭图像的拍摄与自动分析技术[J].微型电脑应用,2015,31(10):14.(XIE Wei,XIA Jie,QIAN Hui,et al. Imaging and automated analysis of metallurgical coke[J]. Microcomputer Applications,2015,31(10):14.)
[20]张亚云.应用煤岩学基础[M].北京:冶金工业出版社,1990.(ZHANG Ya-yun. Foundation of Applied Coal Petrology[M].Beijing:Metallurgical Industry Press,1990.)
[2] Nomura Seiji,Ayukawa Hiroyuki,Kitaguchi Hisatsugu,et al.Improvement in blast furnace reaction efficiency through the use of highly reactive calcium rich coke[J]. ISIJ International,2005,45(3):316.
[3] Nomura Seiji,Naito Masaaki,Yamaguchi Kouichi. Post-reacion strength of catalyst added high reactive coke[J]. ISIJ International,2007,47(6):831.
[4]谢全安,魏侦凯,郭瑞,等.焦炭热性质评价方法的研究进展[J].钢铁,2018,53(9):1.(XIE Quan-an,WEI Zhen-kai,GUO Rui,et al. Present situation of evaluation method of coke thermal properties[J]. Iron and Steel,2018,53(9):1.)
[5]郭治,杜铭华,曲思建.焦炭反应性及反应后强度预测模型研究与分析[J].煤炭学报,2005,30(1):113.(GUO Zhi,DU Ming-hua,QU Si-jian. Prediction model for coke reactivity index and coke strength after reaction[J]. Joural of China Coal Society,2005,30(1):113.)
[6]项茹,薛改凤,刘尚超.炼焦煤的工艺性质对焦炭光学组织的影响[J].煤质技术,2009(7):1.(XIANG Ru,XUE Gai-feng,LIU Shang-chao.Effect of technical property of coking coal on optical texture of coke[J]. Coal Quality Technology,2009(7):1.)
[7]崔平,杨敏,彭静,等.焦炭反应性的多元素矿物催化研究[J].钢铁,2006,41(3):16.(CUI Ping,YANG Min,PENG Jing,et al.Research of multi-element mineral catalysis for coke reactivity[J].Iron and Steel,2006,41(3):16.)
[8]吕庆,王岩,谢海深,等.灰成分及光学组织对焦炭热性能的影响[J].中国冶金,2016,26(8):8.(LüQing,WANG Yan,XIE Hai-shen,et al. Effect of ash composition and optical texture on coke thermal property[J]. China Metallurgy,2016,26(8):8.)
[9]任学延,张代林,张文成,等.影响焦炭热性质的主要因素分析[J].煤化工,2007(3):33.(REN Xue-yan,ZHANG Dai-lin,ZHANG Wen-cheng,et al. Discussion on main factors influencing the thermal properties of coke[J]. Coal Chemeical Industry,2007(3):33.)
[10]张代林,赵梅梅,王培珍,等.影响焦炭热性质因素的研究[J].钢铁,2009,44(10):10.(ZHANG Dai-lin,ZHAO Mei-mei,WANG Pei-zhen,et al. Study on factors of influencing on coke thermal property[J]. Iron and Steel,2009,44(10):10.)
[11]孔德文,张建良,龚必侠,等.高炉块状带焦炭反应性的研究[J].钢铁,2011,46(4):15.(KONG De-wen,ZHANG Jian-liang,GONG Bi-xia,et al. Study on coke reactivity in lump zone of blast furnace[J]. Iron and Steel,2011,46(4):15.)
[12]吴胜利,庹必阳,张丽华,等.焦炭反应性对高炉块状带含铁炉料还原的影响[J].北京科技大学学报,2013,35(3):282.(WU Sheng-li,TUO Bi-yang,ZHANG Li-hua,et al. Influence of coke reactivity on the ferric burden reduction of the lumpy zone in a blast furnace[J]. Journal of University of Science and Technology Beijing,2013,35(3):282.)
[13]郑朋超,张建良,刘征建,等.碱金属对焦炭热性能的影响[J].中国冶金,2017,27(5):19.(ZHENG Peng-chao,ZHANG Jian-liang,LIU Zheng-jian,et al. Effect of alkali metals on thermal properties of coke[J]. China Metallurgy,2017,27(5):19.)
[14]鲍俊芳,薛改凤,王元生,等.焦炭热性能对高炉操作影响的研究进展[J].武钢技术,2014,52(3):58.(BAO Jun-fang,XUE Gai-feng,WANG Yuan-sheng,et al. Research progress of coke thermal property effects on blast furnace operation[J].WISCO Technology,2014,52(3):58.)
[15]吴铿,折媛,刘起航,等.高炉大型化后对焦炭性质及在炉内劣化的思考[J].钢铁,2017,52(10):1.(WU Keng,SHE Yuan,LIU Qi-hang,et al. Consideration on properties of coke and coke deterioration after large-scale blast furnace[J]. Iron and Steel,2017,52(10):1.)
[16]周师庸,叶菁,郭继平,等.富氧喷煤条件下高炉内焦炭显微结构的研究[J].钢铁,1997,32(8):1.(ZHOU Shi-yong,YE Jing,GUO Ji-ping,et al. Study on microstructure of coke in blast furnace with oxygen enriched blast and coal injection[J].Iron and Steel,1997,32(8):1.)
[17]周师庸,赵俊国.炼焦煤性质与高炉焦炭质量[M].北京:冶金工业出版社,2005.(ZHOU Shi-yong,ZHAO Jun-guo. Properties of Coking Coal and Quality of Coke for the Blast Furnace[M]. Beijing:Metallurgical Industry Press,2005.)
[18]钱晖,谢威,夏杰,等.焦炭反射率与强度指标及反应性之间的相关性[J].钢铁,2016,51(12):15.(QIAN Hui,XIE Wei,XIA Jie,et al. Correlationship between strength index,reactivity and reflectance of coke[J]. Iron and Steel,2016,51(12):15.)
[19]谢威,夏杰,钱晖,等.冶金焦炭图像的拍摄与自动分析技术[J].微型电脑应用,2015,31(10):14.(XIE Wei,XIA Jie,QIAN Hui,et al. Imaging and automated analysis of metallurgical coke[J]. Microcomputer Applications,2015,31(10):14.)
[20]张亚云.应用煤岩学基础[M].北京:冶金工业出版社,1990.(ZHANG Ya-yun. Foundation of Applied Coal Petrology[M].Beijing:Metallurgical Industry Press,1990.)