COREX熔融气化炉内料柱的透液性指数及影响因素  

Liquid permeability index of the stock column in a COREX melter gasifier and its influencing factors

作　　者：湛文龙 吴铿[1] 徐万仁[3] 刘起航[1] 张家志[1] 任海亮[1] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]辽宁科技大学材料与冶金学院,鞍山114000 [3]宝山钢铁股份有限公司研究院,上海201900

出　　处：《北京科技大学学报》2014年第9期1241-1246,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金"钢铁联合研究基金"资助项目(51274026;50934007;50874129);国家高技术研究发展计划资助项目(2009AA06Z105)

摘　　要：休风时对COREX熔融气化炉进行风口取样,通过对风口试样的检测分析,用压差度的倒数表示炉内气相对料柱透液性的影响,用空隙度和温度强度的乘积表示炉内的渣铁液相对料柱透液性的影响,建立了表征熔融气化炉料柱透液性的公式.对两批风口试样的研究发现,熔融气化炉内不同位置风口试样的透液性指数与相应位置的滞留铁比呈现一致的对应关系.进一步分析了透液性指数的影响因素,发现在炉况不顺时,未反应完全的酸性脉石直接落入炉缸,导致沿风口径向部分位置的渣样熔化温度高于1500℃,影响了渣铁流动性.提出了增加料层厚度、采取合理的造渣制度、控制均匀的煤气流分布等技术措施,为改善熔融气化炉内料柱的透液性提供帮助.Tuyere sampling was conducted in a COREX melter gasifier during down time. Through the detection analysis of tuyere samples, the effect of gas phase on the liquid permeability of the stock column was expressed by the reciprocal of pressure difference degree, while the effect of liquid phase on the liquid permeability was expressed by the product of voidage and temperature intensity. Based on those, a formula was established to characterize the liquid permeability of the stock column. Investigations on 2 batches of tuyere samples show that there is a compatible corresponding relation between the liquid permeability index and residue iron of tuyere samples at different positions in the melter gasifier. Moreover, some influencing factors of the liquid permeability index were analyzed. it is found that residual acid gangue can directly fall into the hearth in unsteady furnace conditions, which leads to the slag melting temperature in a certain position over 1500 ℃ and thus affects the fluidity of iron slag. Several technical measures are proposed, such as increasing material layer thickness, adopting a proper slagging regime, and controlling uniform gas flow distribution, to provide helps to improve the liquid permeability of the stock column in the melter gasifier.

关 键 词：炼铁 熔融气化炉 透液性 影响因素 造渣 

分 类 号：TF557[冶金工程—钢铁冶金]