冶金尘泥制备钙铁双氧载体材料  

Preparation of Ca-Fe oxygen carrier using metallurgical dust

作　　者：高志芳 苏畅 李娜 春铁军 余正伟 刘海涛 GAO Zhi-fang, SU Chang, LI Na, CHUN Tie-jun, YU Zheng-wei, LIU Hai-tao(School of Metallurgy Engineering, Anhui University of Technology, Ma＇anshan 243002, Anhui, China)

机构地区：[1]安徽工业大学冶金工程学院

出　　处：《钢铁研究学报》2018年第10期782-788,共7页Journal of Iron and Steel Research

基　　金：国家自然科学基金委员会-宝钢集团有限公司钢铁联合研究基金资助项目(NU1660106)

摘　　要：化学链燃烧技术是实现CO2高效低能分离和捕捉的新型燃烧技术。以含铁冶金固废尘泥为研究对象,采用共沉淀法制备了钙铁双氧载体（CaSO4-Fe2O3）,并采用TG-DTA、XRD、SEM以及能谱扫描的分析手段,对CaSO4-Fe2O3双氧载体的材料特性及化学链燃烧反应特性进行了表征和分析。结果表明,由含铁冶金尘泥制备的CaSO4-Fe2O3双氧载体质量分数为93.58%,比表面积为10.37cm-2/g,与煤粉反应后的转化率为67.47%,具有较好的反应活性。结合SEM和EDS分析,造成载体活性降低的主要原因是循环燃烧过程中煤灰分的累积,致使载体成分复杂多元化,并发生化学反应和团聚效应,导致载体活性降低。Chemical chain combustion technology is a new combustion technology that achieves efficient and low energy separation for CO2 capture. CaSO4-Fe2O3 oxygen carrier was prepared by sol-gel method from blast furnace slag containing iron, and X-ray diffraction（XRD） and scanning electron microscopy and energy dispersive X-ray（SEM-EDX） were used to characterize the oxygen carrier particles. The results show that the CaSO4-Fe2O3 oxygen carrier prepared from iron metallurgical dust has a mass fraction of 93.58%, a specific surface area of 10.37 cm-2/g and a conversion rate of 67.47% after reaction, with coal powder, which has good reactivity. Combined with SEM and EDS analysis, the main cause of the decrease of carrier activity is the accumulation of coal ash during the cycle combustion process, resulting in complex and diversified carrier components, chemical reactions and agglomeration effects, and then carrier activity is reduced.

关 键 词：冶金尘泥 CaSO4-Fe2O3双氧载体 化学链燃烧 载氧特性 

分 类 号：TB34[一般工业技术—材料科学与工程]