钢厂含铁粉尘动力学成球性能  

Forming dynamics of pellet made frozinc-bearing dust in steel plant

作　　者：鲁华[1] 吴胜利[1] 张建良[1] 常凤[1] 李宏[1] LU Hua WU Sheng-li ZHANG Jian-liang CHANG Feng LI Hong(School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2017年第5期5-12,共8页Iron and Steel

基　　金：国家自然科学基金资助项目(U1260202)

摘　　要：钢铁生产过程中会产生大量含铁粉尘,目前最为可行的处理方法是将粉尘造球,并利用转底炉生产金属化球团。采用化学分析、激光粒度、BET比表面积和X射线衍射方法对烧结、高炉及电炉3种含铁锌粉尘基本物性进行分析,在此基础上,进一步对3种含铁锌粉尘进行圆盘造球,从成球动力学和生球强度两个方面考察含铁锌粉尘适宜的造球参数。试验结果表明,烧结粉尘具有良好的成球性能,但是在目前试验条件下其生球强度难以达标;电炉粉尘黏结性太强,在造球过程中黏盘严重,两者皆不适宜单独用来造球;高炉粉尘不仅具有良好的成球性能,还具有很强的生球强度,在保证生球产量和质量的情况下,高炉粉尘适宜的造球参数为,圆盘造球时间为20 min,膨润土加入量为2%,造球水分为12.5%~13.0%,圆盘转速为27~31 r/min,圆盘给料量为5 kg。Large amount of iron-bearing dust could be generated in the steel production process. At present, the best way of effective utilization of iron-bearing dust in China is pelletizing using the dust and to producemetallized pellet us- ing the rotary hearth furnace. The basic characteristics of iron-bearing dust, including sintering, blast furnace and elec- tric furnace dust, are investigated through the chemical analysis, laser particle size, BET specific surface area and X- ray diffraction. Furthermore, the pelletizing experiment ofthree kinds of dust is carried out, and the optimal pelletizing parameters are investigated based on the balling dynamics and the green pellet strength. The results show that the dust from sintering has good forming dynamics, while its green pellet strength can not meet the requirement under the cur- rent experimental condition. The dust from electric furnace has a relative large adhension, hence, tends to stick on the wall. The dust from blast furnace has not only a good forming dynamics, but has a large green pellet strengh. To ensure the yield and quality of the pellet, the appropriate pelletizing parameters of BFD are 12.5%-13.0%moisture, 2% bentonite, 20 rain pelletizing time, 27-31 r/min rotating speed and 5 kg feeding amount.

关 键 词：含锌粉尘 基础特性 成球动力学 生球性能 

分 类 号：X757[环境科学与工程—环境工程]