冶金尘泥复合球团自还原脱锌研究与实践
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摘要
冶金固废资源化利用是21世纪钢铁行业面临的重大课题,脱除冶金固废中有害元素并回收有益元素成为了其中的关键技术。提出了一种全新的冶金固废提铁脱锌技术,将冶金尘泥制成双层结构的复合球团,并进行了复合球团自还原微爆裂试验研究和工业应用试验。结果表明,将复合球团加入到铁水罐中,取得了良好的还原效果,利用铁水罐余热和铁水的热能预热复合球,致使复合球团产生自还原并发生微爆裂反应,从而为还原反应提供更多的反应界面、更佳的动力学和热力学条件,实现了含铁、锌尘泥的高效综合利用。
The utilization of metallurgical solid wastes is a major task for the steel industry in the 21 st century,the removal of harmful elements from metallurgical solid waste and the recovery of helpful elements are the key technologies.In this experiment,a new technique of deoxidation of zinc from metallurgical wastes was proposed,the metallurgical dusts were made into composite pellets with double-layer structure,self-reductive micro-cracking test and industrial application tests were carried out. The results showed that the composite ball was added into the torpedo tank,and the reduction effect was achieved. The composite ball was self-reduced and micro-cracked by the waste heat of hot metal ladle and molten iron heat,which provided the dynamic conditions for the reduction reaction,and realized the high efficiency comprehensive utilization of the iron and zinc dust.
The utilization of metallurgical solid wastes is a major task for the steel industry in the 21 st century,the removal of harmful elements from metallurgical solid waste and the recovery of helpful elements are the key technologies.In this experiment,a new technique of deoxidation of zinc from metallurgical wastes was proposed,the metallurgical dusts were made into composite pellets with double-layer structure,self-reductive micro-cracking test and industrial application tests were carried out. The results showed that the composite ball was added into the torpedo tank,and the reduction effect was achieved. The composite ball was self-reduced and micro-cracked by the waste heat of hot metal ladle and molten iron heat,which provided the dynamic conditions for the reduction reaction,and realized the high efficiency comprehensive utilization of the iron and zinc dust.
引文
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[3]钱峰,于淑娟,侯洪宇,等.烧结机头电除尘灰资源化再利用[J].钢铁,2015,50(12):67.(QIAN Feng,YU Shu-juan,HOU Hong-yu,et al.Recycling of the electric dust in sintering machine head[J].Iron and Steel,2015,50(12):67.)
[4]郭玉华,张春霞,樊波,等.钢铁企业含锌尘泥资源化利用途径分析评价[J].环境工程,2010,28(4):83.(GUO Yu-hua,ZHANG Chun-xia,FAN Bo,et al.Analysis and evaluation on utilization ways of zinc-bearing sludge and dust from iron and steel enterprises[J].Environmental Engineering,2010,28(4):83.)
[5]王成立,吕庆,顾林娜,等.碱金属在高炉内的反应及分配[J].钢铁研究学报,2006,18(6):6.(WANG Cheng-li,LüQing,GU Lin-na,et al.Reaction and distribution of alkali metals in blast furnace[J].Journal of Iron and Steel Research,2006,18(6):6.)
[6]YANG Xue-feng,CHU Man-sheng,SHEN Feng-man,et a1.Mechanism of zinc damaging to blast furnace tuyere refractory[J].Acta Metallurgica Sinica,2009,22(6):454.
[7]李辽沙,李开元.回收高炉尘泥中的铁与锌[J].过程工程学报,2009,9(3):468.(LI Liao-sha,LI Kai-yuan.Recovery of iron and zinc from blast furnace sludge[J].The Chinese Journal of Process Engineering,2009,9(3):468.)
[8]王杰,熊玮,张保平.高炉瓦斯灰氨法脱锌工艺分析[J].环境科学与技术,2014,37(5):138.(WANG Jie,XIONG Wei,ZHANG Bao-ping.Dezincing process analysis on blast furnace gas ash by ammonia leaching[J].Environmental Science and Technology,2014,37(5):138.)
[9]张建良,闫永芳,徐萌,等.高炉含锌粉尘的脱锌处理[J].钢铁,2006,41(10):78.(ZHANG Jian-liang,YAN Yong-fang,XU Meng,et al.Research on removal of Zn from blast furnace dust[J].Iron and Steel,2006,41(10):78.)
[10]张鲁芳.我国转底炉处理钢铁厂含锌粉尘技术研究[J].烧结球团,2012,37(3):57.(ZHANG Lu-fang.Study on treatment of Zn-containing dust of iron and steel plants by rotary hearth furnace process in China[J].Sintering and Pelletizing,2012,37(3):57.)
[11]张大奎,于淑娟,侯洪宇,等.尘泥团块对铁水温度影响[J].炼钢,2014,30(6):37.(ZHANG Da-kui,YU Shu-juan,HOU Hong-yu,et al.Influence of dust and mud pellets on the hot metal temperature[J].Steelmaking,2014,30(6):37.)
[12]于淑娟,吕志升,侯洪宇,等.含锌含铁尘泥球团自还原试验研究[J].鞍钢技术,2012(4):13.(YU Shu-juan,LüZhi-sheng,HOU Hong-yu,et al.Study on self-reducion experiment for pellet made by iron-bearing and zinc-bearing sludge[J].Angang Technology,2012(4):13.)