锌在包钢高炉中行为机制  

Behaviors of Zinc in Blast Furnace of Baotou Iron and Steel(Group) Co.

作　　者：张芳[1,2] 张世忠[1] 罗果萍[1,2] 郝忠平[3] 王巨清 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]北京科技大学冶金与生态学院,北京100083 [3]包头钢铁集团公司炼铁厂,内蒙古包头014010

出　　处：《钢铁》2011年第8期7-11,共5页Iron and Steel

基　　金：内蒙古自治区高等学校科学研究项目(NJ10108)

摘　　要：首先测定了包钢炼铁厂6号高炉入炉原燃料及产出项的锌含量,并结合取样期间高炉实际生产数据对6号高炉做了锌平衡分布计算。其次,采用LS230型激光粒度分析仪对各级瓦斯灰的粒度进行检测;采用扫描电镜(SEM,Hitachi S-3000)及能谱分析(X-EDS)对包钢6号高炉炼铁原料及产出物的微观形貌进行观测,并对其赋存状态进行分析。结果表明,包钢6号高炉锌负荷为0.625 kg/t,在国内处于中等偏高水平,必须对烧结矿和球团矿中的锌含量加以控制。支出项中,由瓦斯灰带走的锌量最多,占总支出量的96.14%,应严格控制各级除尘灰进入烧结系统。含锌吸附物均匀分布于瓦斯灰中,不同粒度瓦斯灰对锌的吸收能力有所不同。锌在瓦斯灰中主要以ZnO的形式存在,但其中还含有锌的铁酸盐、硅酸盐、铝酸盐以及硫化物。锌在风口凝结物中的存在形式为金属锌或铅锌合金。Based on the contents of zinc in the input and output except for the production data of No.6 BF of Baotou Iron and Steel（Group） Co.,the equilibrium distribution of zinc was calculated.Moreover,the particle sizes of gas ash of No.6 BF were measured by LS230 laser particle size analyzer;the micro-morphology of all input and output was investigated by means of scanning electron microscopy（SEM,Hitachi S-3000） coupled with an energy-dispersive X-ray analysis（EDX）.The results show that the general burdens of zinc were 0.625 kg/t,and some measures need to be taken to reduce the contents of zinc of sinter and pellet.The amount of zinc emitted from blast furnace with gas ash was 96.14%（in mass）.Therefore BF gas ash isn′t appropriate to be recovered as the sintering materials.Furthermore,the zinc-adsorbate equally distributed in gas ash and the particles with different sizes had distinct ability to adsorb zinc.Zinc in gas ash presents as not only ZnO mainly,but also ferrite,silicate,aluminum or sulfide.Zinc in coagulation in tuyere existed in the state of metal Zn or lead-zinc alloy.

关 键 词：高炉 锌负荷 瓦斯灰 风口 凝结物 

分 类 号：TF531[冶金工程—钢铁冶金]