Leaching of vanadium from stone coal with sulfuric acid

The effects of roasting, mass ratio of H2SO4 to stone coal, leaching temperature, liquid-to-solid ratio, grinding fineness of stone coal, and two-stage counter-current leaching on the vanadium leaching ratio were studied. The results show that the vanadium leaching ratio of roasted stone coal through two-stage counter-current leaching can reach 65.1% at the mass ratio of H2SO4 to stone coal of 20%, leaching temperature of 95 degrees C, leaching time of 30 h, liquid-to-solid ratio of 1.1 mL.g(-1), and grinding fineness of 0.1 mm, which can serve as an experimental basis for the production of vanadium from stone coal.