Recovery of Chromium from Stainless Steel dust

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..



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)
Official URL/DOI:
Uncontrolled Keywords:stainless steel dust, roasting, sodium chromate, solid waste
Divisions:Metal Extraction and Forming
ID Code:5710
Deposited By:Sahu A K
Deposited On:04 Jul 2012 16:45
Last Modified:04 Jul 2012 16:45
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