高炉无钟炉顶设备布料偏析现象  

Segregation of burden distribution phenomenon in bell-less furnace top equipment

作　　者：马洪佑 张建良[1] 王振阳[1] 张磊 MA Hong-you;ZHANG Jian-liang;WANG Zhen-yang;ZHANG Lei(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：《钢铁研究学报》2020年第3期220-226,共7页Journal of Iron and Steel Research

基　　金：中国博士后科学基金资助项目(2019M650490)。

摘　　要：高炉布料制度能够调节煤气流,控制高炉顺行,在高炉生产中发挥重要作用。基于离散元方法对焦炭在高炉炉顶设备内的偏析行为进行模拟研究,主要针对串罐式无钟炉顶设备和并罐式无钟炉顶设备,并对其料罐和料面的模拟结果进行讨论。模拟结果表明:由于渗透作用,焦炭颗粒在料罐内会发生偏析,串罐和并罐罐体结构不同,其偏析现象亦不同;焦炭颗粒运动到溜槽时,由于溜槽的旋转,料流轨迹会发生变化、焦炭在下降过程中存在一定距离的偏移;并罐式布料器由于料罐重心与高炉中心线不重合,焦炭在料面上的质量偏析现象比串罐式严重。在无钟式炉顶布料器布料过程中,炉料的偏析现象直接影响煤气流在高炉内部的分布,当大颗粒集中在炉喉中心时,中心透气性好,中心煤气流得到发展。反之,中心煤气流受到抑制,边缘煤气流得到发展。The blast furnace charging systems can regulate the gas flow, control the blast furnace go smoothly, and play an important role in the blast furnace production. Simulation study on segregation behavior of coke on blast furnace top equipment based on discrete element numerical simulation method,mainly for the series hopper type bell-less top equipment and the parallel tank type bell top equipment,and the simulation results of the hopper and the material surface were discussed. The results show that, due to the osmotic effect, the coke particles will segregate in the hoppers;and the shape of the serial hoppers and the parallel hoppers are different, so the segregation phenomenon are different;when the coke particles move to the chute, the shape of the stream changes due to the rotation of the chute, and the coke particles are offset by a certain distance during the descent;because the center of gravity of the hoppers and the center line of the blast furnace do not coincide with each other, the mass segregation phenomenon of the charge on the burden surface is more serious than that of the series hoppers. In the process of distributing of bell-less top equipment, the segregation of the charge directly affects the distribution of the gas flow in the blast furnace. When large particles are concentrated in the center of the throat, the center has good air permeability and the central gas flow is developed. On the contrary, the central gas flow is suppressed and the marginal gas flow is developed.

关 键 词：离散元方法 并罐式布料器 串罐式布料器 焦炭 偏析现象 

分 类 号：TF542[冶金工程—钢铁冶金]