Publication
Title
In-situ chromium and vanadium recovery of landfilled ferrochromium and stainless steel slags
Author
Abstract
A novel heap leaching method was investigated for selective removal of chromium (Cr) and-vanadium (V) from ferrochromium (FeCr) and stainless steel (SS) slags. In particular, alkaline oxidative heap leaching was simulated on lab-scale by batch and column leaching tests. The results show a selective leaching of Cr (11-19%) and V (7.0-7.5%) after 64 days of column leaching, with a very low dissolution (<2.2% (FeCr slag) and <0.15% (SS slag)) of matrix elements (e.g. Al, Fe, Si, Mg, Ca), when NaOCl is applied as oxidation agent and NaOH as alkaline agent. Furthermore, the used leaching liquor is reactive for a longer period of time, indicating that circulation of leaching liquor could be possible. Finally, the experimental results were fed into a first-order model which predicts that Cr will continue to leach from the tested slags for 4-5 years at a chosen infiltration rate of 73,000 l/(y m(2)). (C) 2016 Elsevier B.V. All rights reserved.
Language
English
Source (journal)
Chemical engineering journal. - Lausanne, 1996, currens
Publication
Lausanne : Elsevier Sequoia , 2016
ISSN
1385-8947 [print]
1873-3212 [online]
DOI
10.1016/J.CEJ.2016.05.128
Volume/pages
303 (2016) , p. 359-368
ISI
000383522800036
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 21.11.2016
Last edited 09.10.2023
To cite this reference