A process has been developed to detoxify the waste magnesia-chromia bricks containing sexivalent chromium and recover valuable materials with arc plasma treatment. Especially magnesium and chromium, which are the major compounds of the waste bricks, could be separately recovered by carbothermic reduction with addition of iron. From the viewpoint of environmental protection and saving resources, such recovery processes are expected to be commercialized.
Metal Recovery From the Waste Magnesia-Chromia Bricks With Arc Plasmas
Contributed by the Fuels and Combustion Technologies Division and presented at the 2nd International Symposium on Advanced Energy Conversion Systems and Related Technologies, Nagoya, Japan, December 1–3, 1998, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the FACT Division, March 15, 2000; revised manuscript received October 30, 2000. Associate Editor: C. Saltiel.
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Tanahashi, N., Takeuchi , A., and Tanaka, K. (October 30, 2000). "Metal Recovery From the Waste Magnesia-Chromia Bricks With Arc Plasmas ." ASME. J. Energy Resour. Technol. March 2001; 123(1): 76–80. https://doi.org/10.1115/1.1346681
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