Method for leaching vanadium in magnetic vanadium iron spinel powder vanadium concentrate by electro-oxidation at room temperature
A spinel-type, electro-oxidation technology, applied in the direction of process efficiency improvement, etc., can solve the problems of dependence and low-cost extraction of vanadium in essence, and achieve the effects of simple equipment, enlarged reaction interface, and reduced pollution
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Embodiment 1
[0033] Using vanadium trioxide and ferric oxide as initial raw materials, they were calcined at 1200°C for 48 hours in a reducing atmosphere to obtain pure Fe 2 VO 4 . Weigh 0.5g of pure vanadium iron spinel, grind it to a particle size below 0.074mm, and adsorb it on the iron sheet at the bottom of the glass sleeve equipped with a magnet. The iron sheet has a diameter of 12mm and a thickness of 3mm. The electrolysis reaction is carried out in an electrolytic cell at normal temperature and pressure. The cathode material of the electrolytic cell is a graphite rod with a diameter of 6 mm, the center distance between the anode and the cathode is 7 cm, and the electrolyte solution is a saturated oxalic acid solution. The cell voltage was selected as 5V, the mechanical stirring speed was 500r / min, the electrolysis temperature was room temperature, and the electrolysis reaction time was selected as 3600s. After the electrolysis reaction, solid-liquid separation was carried out, an...
Embodiment 2
[0035] Using vanadium trioxide and ferric oxide as initial raw materials, they were calcined at 1200°C for 48 hours in a reducing atmosphere to obtain pure Fe 2 VO4 . Weigh 0.5g of pure vanadium iron spinel, grind it to a particle size below 0.074mm, and adsorb it on the iron sheet at the bottom of the glass sleeve equipped with a magnet. The iron sheet has a diameter of 12mm and a thickness of 3mm. The electrolysis reaction is carried out in an electrolytic cell at normal temperature and pressure. The cathode material of the electrolytic cell is a graphite rod with a diameter of 6 mm, the center distance between the anode and the cathode is 7 cm, and the electrolyte solution is a saturated oxalic acid solution. The cell voltage was selected as 10V, the mechanical stirring speed was 500r / min, the electrolysis temperature was room temperature, and the electrolysis reaction time was selected as 3600s. After the electrolysis reaction, solid-liquid separation was carried out, and...
Embodiment 3
[0037] Using vanadium-iron-spinel-type vanadium concentrate as the initial raw material, the vanadium concentrate is ball-milled to a particle size below 0.074mm. Weigh 0.5g of ball-milled vanadium concentrate and 0.5g of iron powder, place them in an agate mortar, and mix well. Adsorb the mixed powder on the iron sheet at the bottom of the glass sleeve equipped with a magnet. The iron sheet has a diameter of 12mm and a thickness of 3mm. The electrolysis reaction is carried out in an electrolytic cell at normal temperature and pressure. The cathode material of the electrolytic cell is a graphite rod with a diameter of 6 mm, the center distance between the anode and the cathode is 7 cm, and the electrolyte solution is a saturated oxalic acid solution. The cell voltage is selected as 10V, the mechanical stirring speed is 500r / min, the electrolysis temperature is room temperature, and the electrolysis reaction is selected as 4600s. After the electrolysis reaction, solid-liquid s...
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