工程科学学报2018，Vol.40Issue(1)：41-50,10.DOI:10.13374/j.issn2095-9389.2018.01.006
利用超重力富集和分离Sn-3％Fe熔体中的杂质元素铁
Enriching and separating iron impurity from Sn--3％Fe melt by super gravity
摘要
Abstract
Iron is one of the major impurity elements in industrially produced crude tin, and it is always removed first during the refining process. In this study, the super gravity field was introduced in the crude tin refining process in order to investigate the direc-tional enriching and separating laws of iron impurity from Sn-3％Fe melt, and thereby purify the crude tin. The experimental results showed that with the gravity coefficient G=500 at a cooling rate of ν=10℃·min-1 , all of the iron-rich phase gathered at the bottom area of the sample;it was hard to find any iron-rich phase particles at the upper area of the sample since super gravity greatly increased the sedimentation of the iron-rich phase in the crude tin melt. The mass percentage of iron in the tailing tin was up to 4. 817％, while that in the refined tin was only 0. 036％. Consequently, the removal rate of iron was up to 98. 78％. The iron-rich phase impurity could be separated effectively from the Sn-3％Fe melt using filtration method in the super gravity field, and the recovery rate of the re-fined tin increased with increase in gravity coefficient in the range of G>30. After filtration at 240℃ by gravity coefficient G=100 for 1 min, the refined tin was separated to the bottom of the crucible, and the iron-rich dross was intercepted by the carbon fiber felt. The mass percentage of iron in the refined tin was only 0. 253％, while that in the iron-rich dross reached 11. 528％. As a result, the re-moval rate of iron was up to 91. 44％, while the recovery rate of the refined tin was as high as 82. 69％.关键词
超重力/富铁相杂质/富集/分离/粗锡精炼Key words
super gravity/iron impurity/enrichment/separation/crude tin refining分类
矿业与冶金引用本文复制引用
杨玉厚,李京京,宋子睿,栾益峰,梁俊威,陈凯,李慧斌,宋波..利用超重力富集和分离Sn-3％Fe熔体中的杂质元素铁[J].工程科学学报,2018,40(1):41-50,10.基金项目
国家自然科学基金资助项目(51234001) （51234001）
