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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°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.
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 leaching temperature of 95 ° 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.