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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 754 pages |
| ISBN: | 978-0-9879917-3-7 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Ni-Fe Alloy Prepared From Non-ferrous Slags Using Carbothermic-electrochemical Reduction Method
Xingmin Guo1; Changyu Sun1;1UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING, Beijing, China;
Type of Paper: Regular
Id Paper: 129
Topic: 12
Abstract:
Recovery of valuable elements from non-ferrous slags has been attended gradually with decrease of natural mineral resources for extraction of metals. In this work, the mechanism of reduction of Fe and Ni elements in molten slags and feasibility of Ni-Fe alloy prepared from the Fe and Ni elements-containing non-ferrous slags were investigated using carbothermic-electrochemical reduction method. The experimental result shows that the carbothermic-electrochemical Reduction Method was used to obtained Ni-Fe alloy with carbon-free from Fe and Ni elements-containing molten slags, in which the reduction of Ni2+ is easier than that of Fe2+ into Ni-Fe alloy. Moreover, the nonferrous slags was pretreated for desulfurization at 1373K for 5hours in air, pre-reduction at 1373K for 4 hours using coal as a reductant and melt-separating between metal reduced and slags remained at 1773K for 0.5 hour, and then was reduced using the carbothermic-electrochemical reduction method which also plays an effect of oxygen potential sensor to displays the reduction rate and the oxide activity in the slags by the current and potential between the electrodes. Finally, a low S, C contents-containing Ni-Fe alloy with compositions of 98.39%Fe, 0.83%Ni, 0.49%Cu, 0.18%C and 0.026%S was obtained from the non-ferrous slags, which is a good material for making a weathering resistant steel.