Recovery of vanadium from stone coal through an environmentally friendly acid leaching technology.

Vanadium was recovered from a stone coal ore by an oxygen roast-acid leach process at a laboratory scale. Up to 85.8% of the vanadium in the ore, which came from the Zhanan mine in Shanxi Province, China, was recovered. The optimal process parameters were found to be a roasting time and temperature of 1.5 hours and 800 C, sulphuric acid dosage rate of 1.2 acid:ore, and a particle size of 85% passing 200 mesh. Leaching efficiency was improved by the addition of 1% KClO3.
Vanadium was recovered from a stone coal ore by an oxygen roast-acid leach process at a laboratory scale. Up to 85.8% of the vanadium in the ore, which came from the Zhanan mine in Shanxi Province, China, was recovered. The optimal process parameters were found to be a roasting time and temperature of 1.5 hours and 800 C, sulphuric acid dosage rate of 1.2 acid:ore, and a particle size of 85% passing 200 mesh. Leaching efficiency was improved by the addition of 1% KClO3.