摘要
软熔带的形状和位置是影响高炉稳定运行的关键因素之一。研究了综合炉料中混入高反应性铁焦对高炉初成渣形成过程的影响。针对综合炉料进行研究,结果表明,铁焦的加入导致试样的变形开始温度降低,这是由于在较低温度下铁焦即开始与CO2反应,增加了煤气中的CO浓度与平衡浓度的差值,加速了铁矿石的间接还原。铁焦的加入一般使软化结束温度升高、滴落温度下降,使得软熔区间大幅度收窄,表明向铁矿石中混入铁焦能够显著改善高炉料柱的透气性。加入铁焦还使滴落熔铁中的碳含量明显提高。优先考虑对料柱透气性的影响,建议使用加入20%(质量分数)矿粉A的铁焦。
The profile and position of the cohesive zone is one of the key factors affecting the blast furnace stable operation. The effect of ferro-coke mixing into the burden materials on primary slag formation process in the blast furnace was experimentally studied. Seven kinds of iron-bearing burden were studied. The results demonstrated that the addition of ferro-coke can lower the compression starting temperature of all samples. This is because ferro-coke starts to react with CO2 at lower temperatures and increases the difference between the CO concentration in gas and the equilibrium content, accel- erating the indirect reduction of iron ore. Moreover, the addition of ferro-coke would generally increase the softening-end temperature and decrease the melt-down temperature, leading to smaller softening-melting temperature range by a large margin. This suggests the mixing of ferro-coke into iron ores can remarkably improve the permeability of blast furnace stock. The addition of ferro-coke increased significantly the carbon content in dropped liquid iron. Giving priority to the effect on the stock permeability, it was suggested to use the ferro-coke prepared with 20% iron ore A.
出处
《钢铁》
CAS
CSCD
北大核心
2014年第8期9-14,共6页
Iron and Steel
基金
国家自然科学基金资助项目(51174149)
关键词
高炉
铁焦混装
初成渣
blast furnace
ferro-coke mix-charging
primary slag
作者简介
程向明（1989-），男，硕士生；E-mail：350990252@qq．com；
通讯作者：毕学工（1956-），男，博士，教授；E-mail：xuegong@public．wh.hb．cn
