高炉冶炼低硅生铁的热力学分析  

Thermodynamic Analysis on Smelting Pig Iron with Low Silicon in Blast Furnace

作　　者：王相力[1] 王再义[1] 刘德军[1] 邢本策[1] 杨大正[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《鞍钢技术》2009年第1期10-13,共4页Angang Technology

摘　　要：通过对高炉冶炼过程中硅元素的还原迁移的热力学计算分析,说明了在高炉环境下,炉渣中的SiO2不能被还原,生铁中的硅完全来自于焦炭和煤粉灰分中游离态的SiO2;Si的溶解反应极大地促进了Si的还原反应;温度是影响硅还原的最关键因素。简述了高炉低硅冶炼工艺的控制要点,包括降低高炉的理论燃烧温度,提高CO分压,提高烧结矿的冶金性能,适度强化,增加喷煤比,并指出精细操作是高炉冶炼低硅生铁的关键。On the basis of analysis for the thermodynamic calculation of silicon reduction migration in BF smelting process, it is explained that SiO2 in slag cant be reduced and silicon in pig iron completely comes from free SiO2 in the ash of coke and coal, the dissolution reaction of silicon forcefully accelerates the reduction reaction of silicon, the temperature is the most important factor effecting silicon reduction. Meanwhile, the control key points of the low silicon smelting process in BF are briefed, which include decreasing the BF theoretical combustion temperature and increasing partial pressure, improving the metallurgical properties, strengthening smelting appropriately, increasing the ratio of pulverized coal injection, and it is pointed out that accurate operation is the key to smelt pig iron with low silicon in BF.

关 键 词：高炉 低硅冶炼 热力学分析 

分 类 号：TF531[冶金工程—钢铁冶金]