Reaction Process of Chromium Slag Reduced by Industrial Waste in Solid Phase

Abstract

Abstract M, a particular industrial waste, was selected to detoxify chromium slag at a high temperature. The carbon remaining in M reduced Cr (VI) of Na 2 CrO 4 borne in the chromium slag to Cr (III) in the solid phase reaction, and its thermodynamics and kinetics were studied. The reduction process of Na 2 CrO 4 by carbon produced CO, which was endothermic. Under the experimental condition, the apparent activation energy was 4. 41 kJ · mol −1 , the apparent order of reaction for Na 2 CrO 4 was equal to one, and the partial pressure of CO was only 0.22 Pa at 1 330 °C.