低成本炼铁方法探讨与实践  

Discussion and practice of low⁃cost ironmaking methods

作　　者：艾名星 葛慧超 张展雷 李士才 柳政根 Ai Mingxing;Ge Huichao;Zhang Zhanlei;Li Shicai;Liu Zhenggen(Shandong Huizhe Environmental Protection Technology Co.,Ltd.,Rizhao 276800,China;Rizhao Quality Inspection and Testing Research Institute,Rizhao 276800,China;School of metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]山东慧喆环保科技有限公司,山东日照276800 [2]日照市质量检验检测研究院,山东日照276800 [3]东北大学冶金学院,沈阳110819

出　　处：《材料与冶金学报》2024年第4期321-328,共8页Journal of Materials and Metallurgy

基　　金：中央高校基本科研业务费(N2225024)。

摘　　要：为了达到低成本炼铁的目的,探讨了烧结矿中经济料配比对其冶金性能的控制,原燃料结构对高炉炉况的影响,以及冶炼工艺操作对高炉经济指标的改善等,提出了相应的优化措施与操作思路,并在文安钢铁1080 m^(3)高炉进行实践.结果表明:为了改善烧结矿的还原性,需平衡烧结矿的各项冶金性能指标,w(FeO)应降至7.0%~8.0%,中小高炉应提高5~10 mm粒级的入炉比例至25%~30%;高炉利用提高块矿配比、配加劣质焦炭等方法,可获得经济型原燃料结构的炉料,同时再采用大矿批、低焦比及低[Si]冶炼等工艺操作,能够有效降低高炉的冶炼成本,但需选取适宜的富氧率和冶炼强度.In order to achieve the goal of low⁃cost ironmaking,the control of metallurgical properties of sintered ore by economic material ratio,the influence of raw material structure on blast furnace(BF)condition,and the improvement of economic indicators of BF by smelting process operation were explored.Corresponding optimization measures and operational ideas were proposed and practiced in the 1080 m^(3)BF of Wen’an Iron and Steel.The results show that it is necessary to balance various metallurgical performance indicators of sintered ore in order to improve the reducibility of sintered ore,the FeO content should be reduced to 7.0%~8.0%,and the proportion of 5~10 mm granularity of sinter should increase to 25%~30%for small and medium⁃sized BF;By using methods such as increasing the proportion of lump ore and adding inferior coke,BF can obtain economical raw material structures.At the same time,by adopting processes such as large ore batches,low coke ratios,and low[Si]smelting,the smelting cost of BF can be effectively reduced,but it is necessary to adopt appropriate oxygen enrichment rate and smelting intensity to adapt to economic material smelting.

关 键 词：高炉 低成本炼铁 优化配矿 煤气利用率 冶炼强度 

分 类 号：TF538.1[冶金工程—钢铁冶金]