Abstract
In order to recover chromium from vanadium slag, the leaching behaviour of chromium during vanadium extraction was studied. The effects of the several parameters that included roasting temperature, roasting time, types of additives as well as addition mass of additives were investigated. The results indicated that chromium can be leached at the same time during vanadium leaching from vanadium slag. In comparison, under the same conditions, the leaching of vanadium is easier than that of chromium. The leaching rate of vanadium and chromium can be beyond 96 and 91%, respectively, under the experimental condition of roasting temperature of 700°C, roasting time of 2 h, 30% (mass fraction) sodium chloride and 20% (mass fraction) sodium carbonate addition to the vanadium slag, leaching temperature of 95°C, and leaching time of 3 h.
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