偏析提纯工艺中铝液温度对除杂率的影响  

Influence of the temperature of liquid aluminum on impurity removing efficiency in the segregation purification process

作　　者：张佳[1,2] 李玉章[1,2] 杨钢[1,2] 汤皓元[1,2] 

机构地区：[1]昆明冶金研究院,云南昆明650500 [2]共伴生有色金属资源加压湿法冶金技术国家重点实验室,云南昆明650520

出　　处：《轻合金加工技术》2017年第4期12-15,共4页Light Alloy Fabrication Technology

基　　金：云南省科技创新平台建设计划-科研院所技术开发项目(2015DC003);云南省应用基础研究计划面上项目(2016FB094)

摘　　要：使用真空定向凝固炉制备高纯铝,固定搅拌频率、搅拌电流、拉晶速度等参数,试验研究了铝液温度对杂质元素除杂率的影响。结果表明,随着铝液温度的升高,杂质元素(平衡分配系数小于1)的除杂率提高;在同一样品中,杂质元素的除杂率呈现两端低中间高的情况。在铝液温度为760℃、拉晶进行到110 mm180 mm长度时,Si、Fe杂质元素的除去率达到峰值。High purity aluminum was manufactured by using the vacuum directional solidi-fication furnace. The influence of the temperature of liquid aluminum on impurity removing efficiency was researched with fixed stirring frequency, stirring electric current and ingot pulling-out speed. The results show that impurity removing efficiency of impurity elements （ E- quilibrium Distribution Coefficient is less than 1 ） are increased when the temperature of liquid aluminum increases. In the same sample, impurity removing efficiency of impurity elements is lower in both ends and higher in the middle. When the temperature of liquid alumi- num is 760℃ and length is pulled to 110 mm - 180 mm, impurity removal rates of Si and Fe reaches the peak values.

关 键 词：高纯铝 偏析提纯 除杂率 铝液温度 

分 类 号：TF821[冶金工程—有色金属冶金]