转炉除尘灰的理化性质及其催化煤粉燃烧效果  

Properties of BOF dust and its effect on combustion of pulverized coal

作　　者：吴浩 邹冲[1] 赵俊学[1] 李小明[1] Wu Hao Zou Chong Zhao Junxue Li Xiaoming(School of Metallurgical Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, Shanxi, China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《钢铁钒钛》2017年第5期84-89,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金(No.51374166);陕西省自然科学基金(N.2016JQ5041)

摘　　要：利用多种检测方法系统研究4种转炉除尘灰的理化性质和对煤粉燃烧性能的影响。结果表明,不同转炉除尘灰粒度差异较大且元素组成复杂;物相组成上均含有Fe3O4,部分存在Fe2O3、CaO及CaCO3;样品微观结构差异明显,10 nm以下的孔隙贡献了主要的比表面积,10 nm以上的孔隙贡献了主要的孔容积;除尘灰通过降低着火、燃尽及反应峰值对应的温度改善煤粉燃烧反应性,但过高的碳酸盐含量会抑制其强化燃烧效果。The physical and chemical properties of four kinds of BOF dust and their effects on the combustion performance of pulverized coal were studied by using a variety of detection methods. The results show that there are Fe_3O_4,Fe_2O_3,CaO and CaCO_3 in the phase composition,and the microstructures of the samples are obviously different.The pores with size below 10 nm contribute to the main surface area,while the pores above 10 nm contribute to the main pore volume.The pulverized coal combustion reactivity has been improved by reducing the ignition,burnout and corresponding temperature of reaction peak due to dust addition,,nervetheless too high carbonate content will inhibit its enhanced combustion effect.

关 键 词：高炉 喷煤 助燃催化剂 转炉除尘灰 理化性质 燃烧反应性 

分 类 号：TF538.6[冶金工程—钢铁冶金] X757[环境科学与工程—环境工程]