下部调剂对高炉炉料运动影响的离散模拟

来源期刊：钢铁钒钛2011年第1期

论文作者：张建良 范正赟 陈永星 杨广庆 杨天钧 有山达郎

文章页码：11 - 16

关键词：高炉； 下部调剂； 炉料运动； 三维离散元； 模拟

Key words：blast furnace； control of lower zone； burden motion； 3D-discrete element method； simulation

摘    要：应用三维离散元法对4 000m³高炉内的炉料运动行为进行研究。结果表明:鼓风动能增加,风口回旋区加深并没有改变高炉上部的料层结构与分布状况,而是使得高炉下部死料柱变小、变矮,其对上部炉料的支撑作用减弱,致使上部炉料的下降速度明显增大,冶炼强度得以提高。风口中心线以上2m处炉腹段,炉料的运动速度与应力分布趋于均一化。堵风口操作致使被堵风口处炉料下降速度减小,炉料所受法向压应力增大,但这种影响仅限于被堵风口处炉腰以下部位。

Abstract: The behaviour of solid flow in 4 000 m³ blast furnace was investigated by 3D-discrete element method.It is found that the increase of blast momentum and depth of raceway would not influence the structure and distribution of burden layer in the upper side of blast furnace.However,the decrease in size of deadman results in the weakness of supporting effect of deadman and the increase of the velocity of burden descending in the upper part which enhances the smelting strength of blast furnace.The velocity and stress of burden tend to uniformity in the 2 m zone above tuyere level.The operation of clogged tuyere leads to the decrease of velocity and increase of stress in the vicinity of the clogged tuyere.The influence is limited in the zone below belly of blast furnace.