杭钢高炉冶炼低硅生铁时的热状态分析  

ANALYSIS OF HEAT STATE IN BLAST FURNACEPRODUCING LOW Si IRON AT HANGZHOUIRON AND STEEL WORKS

作　　者：糜克勤[1] 

机构地区：[1]华东冶金学院

出　　处：《钢铁》1989年第4期8-13,共6页Iron and Steel

摘　　要：本文分析了杭钢高炉冶炼低硅生铁时热状态变化的普遍规律与个别特征。前者(1)软熔带高度下降;(2)焦炭湿度降低;(3)下部需热量减少,炉内中部热量相对充沛;(4)高氧位渣对硅的再氧化作用。后者(1)鼓风湿度升高及矿石预还原率降低导致铁水温度下滑,硫磺有升高的趋势;(2)炉缸热量紧张,炉渣的实际温度与自由流动温度的差值逐渐减少;(3)理论燃烧温度的高低不一定与生铁含硅量有正相关性,高理论燃烧温度亦能获得低硅生铁。实践表明,低硅操作的关键是努力缓和炉缸热量紧张,获取优质铁水。In this paper, both the general pattern and specific features of the change of heat condi-tion during the low Si ironmaking at Hangzhou Works's B. F. are described. The former inc-ludes (1) drop of the level of softening zone; (2) drop of coke temperature; (3) less heat ne-eded in the lower zone and more heat in the middle zone than required and (4) reoxidationof the silicon by slag with higher oxygen potential. The later includes (1) increase of blasthumidity and decrease of prereduction of iron oxide lead to lower hot metal temperature andto increase sulphur content; (2) heat content in the hearth tightens and difference betweenactual and free-flow temperatures of slag narrows gradually and (3) there is no certain posi-tive interrelation between theoretical combustion temperature and Si content, low Si iron canalso be obtained at high TCT. It shows that the key point for low Si smelting is to keephearth have enough heat in order to obtain quality hot metal.

关 键 词：低硅生铁 高炉 冶炼 热状态分析 

分 类 号：TF5[冶金工程—钢铁冶金]