焦炉煤气与O2裂解时竖炉产量的热力学计算  

Thermodynamic calculation on yield of shaft furnace as COG pyrolysised with O

作　　者：周宇露 姜鑫 王小艾 郑海燕 罗果萍[3] 沈峰满 ZHOU Yu-lu;JIANG Xin;WANG Xiao-ai;ZHENG Hai-yan;LUO Guo-ping;SHEN Feng-man(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;Technology Research Institute,HBIS Group,Shijiazhuang 050023,Hebei,China;School of Materials and Metallurgy,Inner Mongolia of Science and Technolgoy,Baotou 014010,Nei Mongol,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]河钢集团钢研总院,河北石家庄050023 [3]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《钢铁》2020年第12期10-17,38,共9页Iron and Steel

基　　金：国家自然科学基金资助项目(51874080,51774071,51974073)。

摘　　要：竖炉还原工艺中焦炉煤气(COG)的消耗量可影响金属铁产量,为了明确O2裂解时焦炉煤气消耗量与竖炉产量的关系,对理想条件下焦炉煤气在竖炉还原工艺中的消耗量和金属铁产量进行了热力学计算。计算结果表明,竖炉生产过程中,作为热源的焦炉煤气消耗量大于作为还原剂的消耗量。补充竖炉内热需求量的方法有两种,补偿方式不同,金属铁产量的变化趋势也不同:直接补充重整焦炉煤气时,金属铁的产量随生成温度的升高而降低,120万t焦炉产生的焦炉煤气在金属铁生成温度为850和900℃时,相应的竖炉生产能力分别为50.72万和49.90万t/a;先采用煤气自重整技术再补充额外焦炉煤气时,随金属铁生成温度的升高,金属铁的产量先增大后减小,120万t焦炉产生的焦炉煤气在金属铁生成温度为845和900℃时,相应的竖炉生产能力分别为56.69万(最大值)和55.68万t/a。研究内容及结果可为实际的竖炉工艺选择合理的操作参数提供理论指导和依据。The consumption of coke oven gas(COG)in the shaft furnace reduction process will affect the yield of metallic Fe.In order to better understand the relation between the COG consumption(pyrolysised with O2)and the yield of metallic Fe,the consumption of COG and the yield in shaft furnace process under ideal conditions were thermodynamically calculated.The calculation results show that,in the shaft furnace process,the COG consumption as a heat source is more than that as a reducing agent.There are two methods to supply the heat gap.The tendency of metallic Fe production is different from two different methods of heat compensation.In the case of directly supplying reformed COG,the yield of metallic Fe decreases with increasing formation temperature of metallic Fe.For a coke oven with a capacity of 120×104 t,as the formation temperature are 850 and 900℃,the corresponding annual yields of shaft furnace are 50.72×104 and 49.90×104 t/a.In the case of ZR technology followed by supplying extra COG,the yield of metallic Fe first increases and then decreases with increasing formation temperature of metallic Fe.For a coke oven with a capacity of 120×104 t,as the formation temperature are 845 and 900℃,the corresponding annual yields of shaft furnace are 56.69×104 t/a(maximum value)and 55.68×104 t/a.The findings from this work may provide guidelines for choosing optimal parameters for an actual shaft furnace process.

关 键 词：竖炉 直接还原 焦炉煤气 热力学计算 金属铁产量 

分 类 号：TF554[冶金工程—钢铁冶金]