摘要
四室还原腔是悬浮磁化焙烧炉的核心部件,为探明四室还原腔内气固流动特性规律,搭建了四室还原腔冷态试验系统,探究了流化风速、松动风速和给料速率对流化室内气固流动特性的影响规律。结果表明,随着流化风速、松动风速的增大,流化室内床层同一高度处,压强呈减小趋势;随着给料速率的增大,流化室内床层同一高度处,压强呈增大趋势。在不同操作条件下,流化室内颗粒浓度分布区间为0.40~0.54,沿轴向均呈“S”型分布。床层同一高度处颗粒浓度随着流化风速和松动风速的增大而减小,颗粒浓度随着给料速率的增大而提高。研究结果对悬浮焙烧炉四室还原腔的结构优化和参数调控具有一定的参考价值。
Four reduction chambers is the core component of the suspension magnetization roasting.In order to ascertain the gas-solids flow characteristics in a four reduction chambers,a cold state test system was set up,and the impacts of gas-solids flow characteristics in a four reduction chambers were investigated under different fluidizing gas velocity,aeration gas velocity and delivery rate.The result showed that the pressure decreases at the same height of the fluidization chamber with the increase of fluidizing gas velocity and aeration gas velocity;The pressure increases at the same height of the fluidization chamber with the enhance of delivery rate.Under different operating conditions,the solids holdup distribution interval is 0.4~0.54 in the fluidization chamber,and it presents an"S"shaped distribution along the axial direction.The solids holdup at the same height of bed decreases with the increase of fluidizing gas velocity and aeration gas velocity,and the solids holdup at the same height of bed enhances with the increase of delivery rate.The results would give valuable references in the structural optimization and parameters regulation of the four reduction chambers in suspension magnetization roasting.
作者
杨峰
高鹏
唐志东
王一同
YANG Feng;GAO Peng;TANG Zhidong;WANG Yitong(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;State Key Laboratory of Mineral Processing Science and Technology,Beijing 102628,China;National-local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2022年第6期68-73,共6页
Metal Mine
基金
国家自然科学基金项目(编号:51734005,52104251)。
关键词
悬浮磁化焙烧炉
四室还原腔
气固两相流
压力特性
颗粒浓度
suspension magnetization roaster
four reduction chambers
gas-solid flow
pressure characteristics
solids holdup
