Method for electrolytic separation of vanadium and chromium in vanadium-chromium containing solution
An electrolytic separation, vanadium-chromium technology, applied in the field of vanadium extraction chemical industry, can solve the problems of high energy consumption, complex process and the like
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example 1
[0045] The vanadium-chromium solution used in this example is a vanadium solution for leaching vanadium-vanadium slag by molten iron blowing, and its main components and pH are shown in Table 1.
[0046] Add 1000mL of the vanadium-chromium solution in Table 1 to a 2000mL clean beaker, stir, and heat to 50°C, add 11.2g of aluminum sulfate, react for 0.5h, cool to room temperature, and filter to obtain a vanadium-chromium solution with Si<0.001g / L . Use sulfuric acid to adjust the pH value of the vanadium-chromium solution to 0, add the vanadium-chromium solution to the electrolytic cell, add an inert electrode and an ion exchange membrane, adjust the voltage to 2V, perform electrolysis for 0.5h, and quickly remove the catholyte and anolyte after the electrolysis is completed.
[0047] After testing, the vanadium concentration in the catholyte is 26.5g / L, and the chromium concentration is 0.026g / L; the vanadium concentration in the anolyte is 1.21g / L, and the chromium concentrat...
example 2
[0049] The vanadium-chromium solution used in this example is a vanadium solution obtained by acidolysis of vanadium extraction from stone coal and treated by an extraction method. The main components and pH are shown in Table 2.
[0050] Add 1000mL of the vanadium-chromium solution in Table 1 to a 2000mL clean beaker, stir, and heat to 100°C, add 33.6g of aluminum sulfate, react for 2h, cool to room temperature, and filter to obtain a Si<0.001g / L vanadium-chromium solution. Use sulfuric acid to adjust the pH value of the vanadium-chromium solution to 1.0, add the vanadium-chromium solution to the electrolytic cell, add an inert electrode and an ion exchange membrane, adjust the voltage to 10V, perform electrolysis for 2 hours, and quickly remove the catholyte and anolyte after the electrolysis is completed.
[0051] After testing, the concentration of vanadium in the catholyte is 53.89g / L, the concentration of chromium is 0.36g / L, the concentration of vanadium in the anolyte i...
example 3
[0053] The vanadium-chromium solution used in this example is a leach solution of vanadium-titanium-magnetite vanadium slag, whose main components and pH are shown in Table 1.
[0054] Add 1000mL of the vanadium-chromium solution in Table 1 to a 2000mL clean beaker, stir, and heat to 80°C, add 22.4g of aluminum sulfate, react for 1h, cool to room temperature, and filter to obtain a Si<0.001g / L vanadium-chromium solution. Use sulfuric acid to adjust the pH value of the vanadium-chromium solution to 0.5, add the vanadium-chromium solution to the electrolytic cell, add an inert electrode and an ion exchange membrane, adjust the voltage to 5V, perform electrolysis for 1 hour, and quickly remove the catholyte and anolyte after the electrolysis is completed.
[0055] After testing, the concentration of vanadium in the catholyte is 27.5g / L, the concentration of chromium is 1.0g / L, the concentration of vanadium in the anolyte is 0.3g / L, the concentration of chromium is 41.2g / L, and the...
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