偏析提纯工艺中铝液温度对除杂率的影响
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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 solidification 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( Equilibrium 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 aluminum is 760℃ and length is pulled to 110 mm-180 mm,impurity removal rates of Si and Fe reaches the peak values.
High purity aluminum was manufactured by using the vacuum directional solidification 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( Equilibrium 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 aluminum is 760℃ and length is pulled to 110 mm-180 mm,impurity removal rates of Si and Fe reaches the peak values.
引文
[1]戴飞.高纯铝定向凝固技术应用研究[J].铝加工,2014(5):26-30.
[2]赵伟.偏析法制备高纯铝设备研发及其工艺探究[D].昆明:昆明理工大学,2013.
[3]王崇国.高纯铝的研究进展[J].中国冶金,2015,25(7):1-4.
[4]DRAPALA J,KUCHAR L,KURSA M.Preparation of high purity metals by crystallization methods[J].Journal De PhysiqueⅣ,1995,5(C7):143-148.
[5]李玉章,杨钢,谭国寅,等.偏析提纯中提纯速度对杂质浓度的影响[J].铸造技术,2016,37(06):1195-1196.
[6]BIRD R B.Transport Phenomena[M].戴干策,译.北京:化学工业出版社,2004:67.
[7]毕晓勤,傅恒志.定向凝固装置的改进与应用[J].金属铸锻焊技术,2009,38(9):126-128.
[8]米国发,王锦永.定向凝固技术的基本原理及发展概况[J].金属加工·热加工,2009(1):57-59.
[9]李青春,王倩,常国威.定向凝固技术与新材料的进展[J].辽宁工学院学报,2003,23(4):42-45.
[2]赵伟.偏析法制备高纯铝设备研发及其工艺探究[D].昆明:昆明理工大学,2013.
[3]王崇国.高纯铝的研究进展[J].中国冶金,2015,25(7):1-4.
[4]DRAPALA J,KUCHAR L,KURSA M.Preparation of high purity metals by crystallization methods[J].Journal De PhysiqueⅣ,1995,5(C7):143-148.
[5]李玉章,杨钢,谭国寅,等.偏析提纯中提纯速度对杂质浓度的影响[J].铸造技术,2016,37(06):1195-1196.
[6]BIRD R B.Transport Phenomena[M].戴干策,译.北京:化学工业出版社,2004:67.
[7]毕晓勤,傅恒志.定向凝固装置的改进与应用[J].金属铸锻焊技术,2009,38(9):126-128.
[8]米国发,王锦永.定向凝固技术的基本原理及发展概况[J].金属加工·热加工,2009(1):57-59.
[9]李青春,王倩,常国威.定向凝固技术与新材料的进展[J].辽宁工学院学报,2003,23(4):42-45.