高炉瓦斯泥自还原铁锌分离BBD法优化  

Optimization of Separating Iron and Zinc from BF Gas Sludge by BBD Method

作　　者：周兰花[1] 曾富洪[1] 龚永民 Zhou Lanhua;Zeng Fuhong;Gong Yongmin(Panzhihua University,Panzhihua,Sichuan,China)

机构地区：[1]攀枝花学院,四川攀枝花617000

出　　处：《矿产综合利用》2022年第5期31-36,共6页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金(51764031);攀枝花大学科技园“种子资金”。

摘　　要：针对高炉瓦斯泥中重要有价元素铁锌分离回收利用难问题,以优化高炉瓦斯泥加热自还原热工参数、实现铁锌良好分离为目的,开展了高炉瓦斯泥球团加热自还原的单因素实验以及响应曲面中的BBD(BoxBehnken Design)法设计的因素优化实验。铁锌还原分离效果以铁、锌的金属化率作为评价指标。结果发现:各热工参数对铁、锌氧化物还原分离影响程度为加热时间>温度>造球压力;铁锌还原分离优化的热工参数为1299.95℃、加热时间为47.05 min、造球压力为8 MPa。热工参数优化条件下的BBD法实验得到:球团还原过程中铁的金属化率达94.67%、锌的金属化率达96.08%,铁主要以金属铁形式留存于球团中,锌以气态单质锌进入烟尘,在烟尘中氧化成为ZnO,铁锌实现了良好的分离。In order to optimize the thermal parameters of BF gas sludge and realize the good separation of iron and zinc from the sludge,the single factor experiment of heating self reduction of the sludge pellet and that of factor optimization design by BBD(Box-Behnken Design)method in response surface were carried aiming at the problem difficult to separate and recover iron and zinc from the sludge.The metallization rate of iron and that of zinc are used as the evaluation index for the separation of iron and zinc.The results show that the influence of thermal parameters on the reduction and separation of iron and zinc oxides are time>temperature>pelleting pressure;the optimized conditions are1299.95℃,47.05 min and 8 MPa of pelleting pressure.It is obtained by the optimization test of thermal parameters designed by BBD method that the metallization of iron and zinc reach to 94.67%and 96.08%,respectively,and iron is mainly retained in pellets in the form of metallic iron and Zinc enters into the dust as a gaseous element zinc and then oxidized to ZnO dust.Good separation of iron and zinc is achieved.

关 键 词：高炉瓦斯泥 球团 自还原 响应曲面 

分 类 号：TD989[矿业工程—选矿] TF55[冶金工程—钢铁冶金]