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Vanadium is an important metal that has been widely used in metallurgy,chemical industry, aviation etc due to its physical properties such as fine ductility, high melting point, good corrosion resistance and plasticity.Vanadium mainly exits in titanium magnetite ore and stone coal in China.The gross reserve of vanadium in stone coal is 17 times higher than that in titanium magnetite ore.It has been a hotspot to extract vanadium from stone coal.