Enriching and separating iron impurity from Sn-3% Fe melt by super gravity

YANG Yu-hou; LI Jing-jing; SONG Zi-rui; LUAN Yi-feng; LIANG Jun-wei; CHEN Kai; LI Hui-bin; SONG Bo

doi:10.13374/j.issn2095-9389.2018.01.006

Volume 40 Issue 1

Jan. 2018

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YANG Yu-hou, LI Jing-jing, SONG Zi-rui, LUAN Yi-feng, LIANG Jun-wei, CHEN Kai, LI Hui-bin, SONG Bo. Enriching and separating iron impurity from Sn-3% Fe melt by super gravity[J]. Chinese Journal of Engineering, 2018, 40(1): 41-50. doi: 10.13374/j.issn2095-9389.2018.01.006

Citation:

YANG Yu-hou, LI Jing-jing, SONG Zi-rui, LUAN Yi-feng, LIANG Jun-wei, CHEN Kai, LI Hui-bin, SONG Bo. Enriching and separating iron impurity from Sn-3% Fe melt by super gravity[J]. Chinese Journal of Engineering, 2018, 40(1): 41-50. doi: 10.13374/j.issn2095-9389.2018.01.006

Citation:

YANG Yu-hou, LI Jing-jing, SONG Zi-rui, LUAN Yi-feng, LIANG Jun-wei, CHEN Kai, LI Hui-bin, SONG Bo. Enriching and separating iron impurity from Sn-3% Fe melt by super gravity[J]. Chinese Journal of Engineering, 2018, 40(1): 41-50. doi: 10.13374/j.issn2095-9389.2018.01.006

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Enriching and separating iron impurity from Sn-3% Fe melt by super gravity

doi: 10.13374/j.issn2095-9389.2018.01.006

YANG Yu-hou^1,2,
LI Jing-jing^1,2,
SONG Zi-rui³,
LUAN Yi-feng^1,2,
LIANG Jun-wei^1,2,
CHEN Kai^1,2,
LI Hui-bin^1,2,
SONG Bo^{1,2
,
,}

1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2) State Key Lab of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
3) School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Received Date: 2017-06-01

Abstract

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 directional 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 refined 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 removal rate of iron was up to 91.44%, while the recovery rate of the refined tin was as high as 82.69%.
- super gravity,
- iron impurity,
- enrichment,
- separation,
- crude tin refining

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References(16)

References

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