限产条件下日钢高炉低燃料比生产实践  

Low Fuel Rate Production Practice in Rizhao Steel BF under Constraining Policy

作　　者：罗力 张强[1] 朱小龙 常凯 LUO Li;ZHANG Qiang;ZHU Xiaolong;CHANG Kai(Rizhao Steel Holding Group Co.,Ltd.)

机构地区：[1]日照钢铁控股集团有限公司 [2]日照钢铁控股集团有限公司炼铁制造部,276800

出　　处：《炼铁》2022年第3期31-34,共4页Ironmaking

摘　　要：日钢高炉在限产条件下采用低成本生产模式,利用系数降低至3.0t/(m^(3)·d)以下,渣比达到500kg/t。通过采取控制风口循环区环圈面积、推行“厚焦层、大角度、大角差”、低硅冶炼、提高镁铝比等措施,使高炉鼓风动能维持在50~55kJ/s,风口燃烧带深度系数n保持在0.55-0.60;同时,还进行了烧结矿降FeO、小粒度烧结矿分级入炉和槽下高、低碱度烧结矿混合上料等试验,改善煤气利用率,高炉实现稳定顺行,燃料比降低。Rizhao Steel changes the production strategy from scale benefit smelting to low-cost smelting in its blast furnace,on the background of production constraining policy,and the furnace utilization coefficient drops to below 3.0t/(m^(3)·d)and the slag rate reaches 500 kg/t.To cope with this situation,following measures are taken:controlling the raceway area of the tuyere,operating based on the concept of"thick coke layer,large distribution included angle and large differential angles",carrying out the practice of low silicon smelting,magnesium extraction and calcium reduction,remaining the blast kinetic energy at 50~55 kj/s and keeping the coefficient(n)of tuyere combustion zone at 0.55~0.60.In addition,other practices are also adopted,including dropping FeO,charging the small sinter according to the size,and charging the blended sinter of different alkality in order to improve the gas utilization.As a result,the furnace achieves long-term stable and smooth running,and the fuel consumption reduces gready.

关 键 词：高炉 燃料比 鼓风动能 燃烧带深度系数 低硅 提镁 

分 类 号：TF54[冶金工程—钢铁冶金]