Abstract: V₂O₅ grade of mica type vanadium stone coal from Hubei is 0.81%，vanadium mainly occurs in muscovite and illite.To increase V₂O₅ grade of acid leaching feed，reduce acid leaching capacity and acid consumption mineral content，so as to reduce acid consumption and production cost，gravity-flotation combined technology was conducted on representative sample to pre discarding tailings.Results showed that at grinding fineness of 70.9% passing 74 μm，using ultralimit spiral chute roughing，middings reground to 65.6% passing 74 μm and reseparation by spiral chute，reseparation middings reground to 75.6% passing 74 μm and direct flotation，discarding tailings with yield rate of 29.59%，V₂O₅ grade of 0.34%，concentrate grade of V₂O₅ increased to1.01%，V₂O₅ recovery rate was 87.60%.Achieved goals on improve acid leaching feed V₂O₅ grade and reduce acid leaching capacity and acid consumption content.

Key words: Vanadium-bearing stone coal, Ultralimit spiral chute, Gravity-flotation combined beneficiation process