布料模式对COREX预还原竖炉煤气流分布的影响  

Influence of Burden Distribution Mode on Gas Distribution in COREX Shaft Furnace

作　　者：应伟峰[1] 孙野[1] 罗志国[1] 邹宗树[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《中国冶金》2012年第4期13-18,共6页China Metallurgy

摘　　要：布料模式决定了炉料的空隙度,而炉料的空隙度分布决定了煤气流的第2次分布。采用三维竖炉数学模型,考察了单环布料情况下,挡位分别在竖炉炉顶直径的0.0、0.8、1.6、2.0、2.4、2.8m时竖炉内煤气压差和煤气流的变化情况。结果表明:布料过程在料面上发生的炉料粒度偏析对煤气流分布的影响很大,料堆尖处煤气流速很低。随着布料档位外移,竖炉整体压差和围管压差呈现增加的趋势,而反窜煤气比例呈现先微弱降低后迅速增加的趋势,拐点出现在2.0m布料档位。竖炉炉料布料方式对煤气流有再分配的作用,较为适宜的布料档位为1.6m,不宜超过2.0m。Burden distribution mode determines the burden porosity, and the burden porosity determines the seconda- ry distribution of gas flow. In this paper, a three-dimensional mathematical model was employed to study the change of pressure drop and gas flow in shaft furnace under different single-loop charging gear （0.0, 0.8, 1.6, 2.0, 2.4, 2.8 m in radius of charging tip round）. The results showed that the burden size segregation has great effect on gas flow distribution during charging process, and the gas flow rate is very low on the tip of stock pile. With the out- ward motion of charging gear, the pressure difference of the whole shaft furnace and bustle increase. The gas flow backwards slightly decreases at first but rapidly increases. The inflexion appears in 2.0 m charging gear. The suitable charging gear is 1.6 m, and should not exceed 2.0 m.

关 键 词：预还原竖炉 单环布料 数值模拟 

分 类 号：TF557[冶金工程—钢铁冶金]