Prasad, Sanjay (2008) Recovery of Chromium from Stainless Steel dust. In: The 23rd International Conference on Solid Waste Technology and Management, March 30 - April 2, 2008, Philadelphia, U.S.A..
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Abstract
This investigation deals with the recovery of chromium as sodium chromate of 99.5% purity from stainless steel dust containing 7.72% chromium obtained from stainless steel processing plants. The stainless steel dust mostly contained iron in oxide form along with chromium, nickel (1.7 1%) and manganese (3.5 5%). The steel dust was roas-ted with soda ash followed by water leaching to recover
the major constituent chromium. It was found that the
roasting at 1073 K in 90 minutes resulted in maximum (95%)
chromium recovery. Kinetics of sodium chromate formation
followed topochemical model involving chemical reactions at
the surface with activation energy of 22 kJmol" 1 . TG/DTA,
XRD phase identification and SEM-EDX confirmed the exper-imental observation and the mode of reaction.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Uncontrolled Keywords: | stainless steel dust, roasting, sodium chromate, solid waste |
| Subjects: | Metallurgy Waste Management |
| Divisions: | Metal Extraction and Forming |
| Depositing User: | Users 5 not found. |
| Date Deposited: | 04 Jul 2012 11:15 |
| Last Modified: | 04 Jul 2012 11:15 |
| URI: | http://eprints.nmlindia.org/id/eprint/5710 |
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