AMV output in 2018-2019 According to FerroAlloyNet, the total output of ammonium metavanadate in 2019 is about 11397 tons, only 182 tons more than that in 2018. From the monthly output histogram, it can be seen that the first half of 2019 is relatively stable, and the output in the second half of 2019 has been reduced. Affected by the environmental protection and market situation, the production of vanadium extraction from stone coal in Hunan Province has been stopped totally, and there are only a few enterprises with stable production.