炭化温度对高炉喷吹用竹炭微观结构的影响  

Effect of carbonization temperature on microstructure characters of bamboo char used for blast furnace injection

作　　者：徐润生[1,2,3] 郑恒[1,2] 王炜 姜曦[4] 刘全国[5] 薛正良 XU Run-sheng;ZHENG Heng;WANG Wei;JIANG Xi;LIU Quan-guo;XUE Zheng-liang(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Provincial Engineering Technology Research Center of Metallurgical Secondary Resources,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Office of New Technology Promotion and Application,The Chinese Society for Metals,Beijing 100711,China;Suizhou Branch,Hubei Institute of Measurement and Testing Technology,Suizhou 441300,Hubei,China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [3]武汉科技大学湖北省冶金二次资源工程技术研究中心,湖北武汉430081 [4]中国金属学会新技术推广应用办公室,北京100711 [5]湖北省计量测试技术研究院随州分院,湖北随州441300

出　　处：《钢铁研究学报》2018年第7期515-522,共8页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51704216);国家自然科学基金委员会-中国宝武钢铁集团有限公司钢铁联合研究基金资助(U1760101);钢铁冶金及资源利用省部共建教育部重点实验室开放基金资助(FMRUlab17-5)

摘　　要：为了研究炭化温度对高炉喷吹用竹炭微观结构的影响,采用元素分析仪、红外光谱、XRD、拉曼、扫描电镜等先进的表征手段解析了不同炭化温度条件下竹炭的化学成分、官能团、微晶结构、石墨化结构以及微观形貌特征。研究结果表明,随着炭化温度的增加,竹炭的挥发分大幅降低,固定碳大幅增加,H和O元素含量逐渐减少。炭化温度高于500℃后,竹炭基本完成了含氧官能团和不饱和侧链的分解。随着炭化温度的升高,竹炭的芳香微晶逐渐长大,碳基质有序化程度逐渐变好,竹炭的空心管壁逐渐产生微孔。此外,炭化温度高于500℃后,竹炭的空心管壁发生破碎、坍塌,有助于降低其机械强度,改善竹炭的可磨性。In order to investigate the effect of carbonization temperature on the microstructure characters of bamboo char used for blast furnace injection,some advanced test measures,such as elemental analyzer,fourier transform infrared spectroscopy（FTIR）,X-Ray diffraction（XRD）,Raman,scanning electron microscope（SEM）were used to reveal the characters of the chemical element composition,functional groups,microcrystalline structure,graphite structure and micromorphology of bamboo char treated at different temperatures.The results show that with the increase of carbonization temperature,the volatile content of bamboo char decreases,the fixed carbon content increases,and the H and O contents reduce.When the carbonization temperature is above 500℃,the decomposition of the oxygen-containing functional groups and unsaturated side chains of bamboo is almost completed.With increasing the annealing temperature,the aromatic microcrystal of bamboo char gradually grows,the ordered degree of bamboo char gradually increases,and the micro pores are gradually generated on the wall of bamboo char.Furthermore,when the carbonization temperature reaches 500℃,the wall of bamboo char begins to break and col-lapse,which contributes to the reduction of mechanical strength of bamboo char,and the improvement of the grindability of bamboo char.

关 键 词：竹炭 炭化温度 官能团 微晶结构 石墨化结构 

分 类 号：TF538.6[冶金工程—钢铁冶金] TQ127.11[化学工程—无机化工]