煤制气直接还原铁两段串联流程估算  

Estimation of two-section series DRI process using coal gas

作　　者：苏亚杰[1] 蔡湄夏 杜英虎 陈寿林[4] 

机构地区：[1]山西焦煤集团山西省焦炭集团有限责任公司,山西太原030024 [2]太原钢铁集团有限公司技术中心,山西太原030003 [3]太原钢铁集团有限公司原煤气厂,山西太原030003 [4]中国日用化学工业研究院原四室,山西太原030001

出　　处：《中国冶金》2017年第5期27-32,共6页China Metallurgy

摘　　要：为了降低直接还原铁能耗,根据试验数据研究了煤制气直接还原铁两段串联流程。串联流程中第一段竖炉用煤制气粗煤气余热和含碳球团冶炼直接还原铁,含碳球团以焦粉、半焦粉或无烟煤粉为还原剂,铁精矿、无机黏结剂混合后加压制作,电炉熔化直接还原、脱硫和生产水渣。串联流程中第二段竖炉以第一段净化后的炉顶煤气为第二段直接还原铁还原气,以氧化球团为原料。结果表明,煤制气直接还原铁两段串联流程估算能耗为394.8kg/t;与铁水比可比能耗为487.8kg/t,比高炉低41.2kg/t,生产过程中产生的污染物和温室气体排放低于高炉,接近天然气直接还原铁。In order to reduce the energy consumption of the DRI process, the two-section series DRI process which based on the laboratory findings was researched. In the First section shaft furnace, the direct reduction iron was produced by using the raw gas preheating the carbon-containing pellet which was made up of the iron ore concentrate and inorganic binder and reduced by the coke, semi-coke or anthracite. The hot metal was first separated out from the melting direct reduced iron with electric furnace,and then the desulphurization process and the production of water slag were conducted. In the second section shaft furnace,the flue gas after purifying from the first shaft furnace was used to produce the direct reduced iron, and the raw materials were mainly pellets. The results showed that the estimation energy consumption of the tandem process was about 394.8 kg/t,and comparing with the hot metal, the comparable energy consumption was 487.8 kg/t which was 41.2 kg/t lower than the blast furnace process. The pollutant and CO2 emissions of the process were close to the natural gas process, and lower than BF process.

关 键 词：煤制气 余热炼铁 直接还原铁 两段串联 生态工业 

分 类 号：TF55[冶金工程—钢铁冶金]