Extraction of vanadium from converter slag by twostep
Extraction of vanadium from converter slag by twostep sulfuric acid leaching process Sichuan Province southwestern China Vanadium slag 100 g was first mixed with calcium carbonate 123 g and was mechanically activated in a planetary ball mill Retsch PM 100 Germany for 40 min at a rotation rate of 400 rpm and a balltoslag weight