Behaviar of Cr-Ca Systems in CO Atmosphere
Journal of the Metal Finishing Society of Japan1974Vol. 25(7), pp. 380–385
Abstract
The behavior of Cr-Ca systems in CO atmosphere was investigated. As the results, it was found that the formation of Cr6+was completely inhibited by calcining Cr3+-Ca systems at above 400°C and CaCrO4 was completely reduced at above 600°C in CO atmosphere; and simultaneously, a substance, α was produced which was insoluble in water and HCl, and had the highest peak of X-ray diffraction pattern at 2θ=23.8. It was confirmed by the above facts that the calcination in reducing atmosphere would be effective for the treatment of sludge including chromium.
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