变径炭素回转窑内物料平均停留时间的计算  

Calculation of mean residence time of solids in variable diameter carbon rotary kiln

作　　者：王春华[1] 陈文仲[1] 陈海耿[1] 左春友[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《化工学报》2009年第3期574-579,共6页CIESC Journal

基　　金：国家科技支撑计划项目(2006BAB12B04)~~

摘　　要：Based on the axial bed depth model of straight rotary kiln proposed by prior researchers,the equation of mean residence time of solids in carbon rotary kiln with variable diameter and turn-down rig was developed.Cold experiments were carried out on a laboratory rotary kiln under ambient conditions.The comparison between calculated results and experiment data showed that calculated results of the residence time of solids agreed well with measurements and the prediction error varied in a small range of-15%—+12%.No fitting parameter was necessary.The mass flow rate of solids increased and the mean residence time decreased with increasing kiln rotation speed and kiln slope.The mass flow rate of solids increased and the mean residence time might possibly decrease or increase with increasing dam height at the feed end.Based on the axial bed depth model of straight rotary kiln proposed by prior researchers, the equation of mean residence time of solids in carbon rotary kiln with variable diameter and turn-down rig was developed. Cold experiments were carried out on a laboratory rotary kiln under ambient conditions. The comparison between calculated results and experiment data showed that calculated results of the residence time of solids agreed well with measurements and the prediction error varied in a small range of -15% ＋12%.No fitting parameter was necessary. The mass flow rate of solids increased and the mean residence time decreased with increasing kiln rotation speed and kiln slope. The mass flow rate of solids increased and the mean residence time might possibly decrease or increase with increasing dam height at the feed end.

关 键 词：炭素回转窑 窑尾扩径 翻料装置 物料停留时间 

分 类 号：TF062[冶金工程—冶金物理化学]