高炉喷吹煤粉的适宜粒度研究  

Study on Suitable Grain Size of Pulverized Coal Injection in BF

作　　者：王再义[1] 邢本策[1] 王相力[1] 张伟[1] 张洪宇[2] 裴海玉[2] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009 [2]鞍钢股份有限公司炼铁总厂,辽宁鞍山114021

出　　处：《鞍钢技术》2009年第5期17-19,共3页Angang Technology

摘　　要：利用自制的燃烧实验装置，研究了鞍钢高炉喷吹煤粉粒度对燃烧性能的影响。结果表明，煤粉的粒度对燃烧性具有较大的影响，粒度〈0．071mm的煤粉燃尽时间最短，但与0．071—0．100mm和0．100～0．200mm粒度级别之间的差别并不是很大；粒度〉0．200舢时，燃尽时间明显延长，0．200mm是明显的分界点。煤粉中粒度〈0．071mm的比例与燃尽时间并不完全符合线性关系，40％以下变化比较明显，60％～100％之间变化并不大。Effects of the grain size of pulverized coal injection in BF on combustion performance are studied by self-made experimental rig for combustion of pulverized coal. The experimental resuits show that the grain size of pulverized coal has a much effect on combustion performance. Bunting -out time is the shortest when the grain size of pulverized coal is less than 0. 071 mm, it has little distinction with that of the grain size with 0.071 -0. 100 mm and 0. 100 -0.200 mm. Burning-out time is prolonged when the grain size of pulverized coal is more than 0.200 mm. So the grain size of 0.200 mm is a critical value. The percentage of the pulverized coal with grain size less than 0. 071 mm is not completely in accord with the linear relation with the burning - out time. The change of the burning - out time is obvious when this part of pulverized coal accounts for less 40%, but it is not obvious when 60% -100%.

关 键 词：高炉 喷煤 煤粉粒度 烧结性能 

分 类 号：TF538[冶金工程—钢铁冶金]