CONSECUTIVE REVERSIBLE 1ST-ORDER 2-STAGE REACTION MODEL FOR REDUCTIONOF CR2O3

A consecutive reversible first order two stage reaction model has been applied to results obtained from a study of the effect of Cr2O3 conce ntration and furnace atmosphere on the reduction of Cr2O3 from slag. T he reduction reactions were found to conform with the model above. A c omputer program was used to determine the rate constants for particula r sets of data. The model was modified to take account of the change o f slag height, due to sampling, during an experimental run. The concen trations of (Cr3+), (Cr2+), and [Cr] were found not to be sensitive to changes of the height of slag. The rate constants for the runs in whi ch 5, 8, and 10 wt-%Cr2O3 were initially added to the slag were found to be identical, probably an indication of no change of the reaction m echanism with increasing concentration of Cr2O3 in the slag. An argon atmosphere was found to increase the rate of (Cr2+) reduction compared with a carbon monoxide atmosphere by a factor of 1.4.