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.
Issue Section:Technical Papers
Keywords:recycling, magnesium, chromium, materials, brick industry, plasma arc spraying, Arc Plasma, Pyrometallurgical Process, Magnesia-Chromia Bricks, Waste, Chemical Equilibrium Calculation, Metal Recovery, Sexivalent Chromium, Detoxification
Topics:Bricks, Electric arcs, Iron, Magnesium (Metal), Metals, Temperature, Heating
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