摘要
通过建立布料过程的数学模型研究了COREX竖炉的布料规律,改进了空区料流轨迹模型使其可以考虑溜槽内料流厚度和宽度分布及炉料粒度的影响,并用多条线段联合描述料面形状.研究表明:炉料在溜槽末端出口处的料层厚度和炉料的粒度分布决定了炉料在空区的料流轨迹;炉料离开溜槽末端速度与溜槽倾角成反比关系,与溜槽转速成正比关系;炉料在炉喉的落点位置离炉喉中心距离与溜槽倾角、溜槽转速成正比关系.利用该模型可计算出不同布料模式和布置不同炉料时料堆长大过程和形成的料面形状.
An extended mathematical model of the material flow trajectory in free-space was developed to investigate the burden distribution process of COREX shaft.The influence of burden layer distribution of depth and width on the chute and the elaborating charging profile by multiple-linearization were considered in the model.The results showed that the flow trajectory of particles in free-space is determined mainly by the burden layer depth and particle size at the bottom of the chute.The terminal velocity of leaving chute is proportional to the rotation velocity and inverse dependence on the angle of the chute.The distance from the landing position of burden particle to the shaft centre at near throat increases with the increasing of the angle and rotation velocity of the chute.The packing process and charging profile under the different conditions of charging pattern and burden materials can be simulated by the model.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第11期1591-1594,共4页
Journal of Northeastern University(Natural Science)
基金
国家"十二五"科技支撑计划项目(2011BAE04B01
2011BAE04B02)
国家自然科学基金资助项目(50774019
51174053
51104037)
高等学校博士学科点专项科研基金资助项目(200801451091
20070145003)
关键词
COREX竖炉布料
料层厚度
粒度分布
料面形状
数学模型
burden distribution of COREX shaft
burden layer depth
particle size distribution
charging profile
mathematical model
