摘要
采用真空熔炼—真空蒸馏的方法处理焊锡电解阳极泥,在还原真空度20~30 Pa,还原温度为1273 K,还原剂为30%,还原时间1.5 h,蒸馏温度1573 K,蒸馏真空度10-2~0 Pa,蒸馏时间30 min下,得到了纯度为98.13%的粗锡,粗锡中锑、铋、银的含量降低至0.19%,0.85%,0.82%,大部分的锑、铋进入冷凝物中,实现了锡与锑等有价金属一定程度的分离。真空处理后得到的粗锡可返回锡电解系统生产精锡,得到的冷凝物可作为锑冶炼原料进行利用。
The soldering tin electrolytic anode slime was recycled by carbo-thermal reduction and thermal distillation in low vacuum. The influence of the recycling conditions,including but not limited to the reduction/distillation temperatures and times,reductant content（coke powder） and pressure,on the contents of Sn,Sb,Bi and Ag in the crude Sn ingot and condensates,was theoretically analyzed and experimentally investigated with X-ray diffraction. The results show that the novel technique does a good job in recycling the Sn anode slime. To be specific,reduced at 1273 K for 1. 5 h in 20 ～30 Pa and with a 30%（wt） of coke powder; and distilled at 1573 K for 30 min in 10^-2～0. 0 Pa,the crude Sn ingot contains 98. 13% Sn,and the Sb,Bi and Ag impurity contents decreased to0. 19%,0. 85%,0. 82% of those in the anode slime,respectively. We suggest that the distilled crude tin be a good raw material for Sn-electrolysis and further Sb-extraction.
作者
李学鹏
刘大春
王娟
Li Xuepeng Liu Dachun Wang Juan(National Engineering Laboratory for Vacuum metallurgy, Kunming University of Science and Technology,Kunming 650093, China Key Laboratory of Vacuum metallurgy for Nonferrous of Yunnan Province ,Kunming 650093, China Yunnan University, Kunming 650093, China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2017年第1期83-88,共6页
Chinese Journal of Vacuum Science and Technology
基金
国家自然科学基金支持项目(U1202271)
关键词
焊锡电解阳极泥
锡
真空还原熔炼
真空蒸馏
Soldering tin electrolytic anode slime
Tin
Vacuum reduction smelting
Vacuum distillation
