Classifications

• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
  • C25C7/005—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells for the electrolysis of melts
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
  • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
  • C25C3/04—Electrolytic production, recovery or refining of metals by electrolysis of melts of magnesium

Definitions

• the present invention relates to the field of electrolytic magnesium chloride, and more particularly to an electrolytic apparatus and an electrolytic method for producing magnesium by electrolytic magnesium chloride.
• Magnesium is a 21st century "green material", which is widely used in aviation, aerospace, transportation, electronic communication and metal reducing agents due to its excellent performance. It has attracted great attention from all countries.
• the development and application of magnesium alloy materials are also As a key development area of new materials, the production of magnesium metal has attracted wide attention.
• the metal magnesium refining method mainly includes two processes of molten salt electrolysis and metal thermal reduction, and the molten salt electrolysis process is widely applied in the magnesium-titanium joint enterprise.
• domestic enterprises adopt the traditional monopolar electrolytic cell technology including separator electrolyzers and non-separator electrolyzers.
• the main structure is to place a plurality of sets of anode and cathode electrodes in parallel in the same electrolytic cell.
• the anode electrode forms an electrolysis chamber, and each electrolysis chamber in the same electrolysis cell has a parallel relationship.
• the molten salt of sodium chloride, potassium chloride and calcium chloride which accounts for 10% to 20% by weight of magnesium chloride in the electrolytic bath, is heated to about 700 °C for electrolysis, and the cathode generates liquid magnesium, and the anode generates chlorine gas. Since the density of the metallic magnesium is lower than that of the molten salt, the generated metallic magnesium floats on the liquid surface, and the magnesium is extracted by electrolysis. The chlorine gas generated by the anode floats out of the electrolyte liquid and is extracted by a chlorine press.
• This monopolar electrolytic cell generally increases the capacity of the single tank by increasing the volume of the electrolytic cell and increasing the number of anode and cathode groups in the same electrolytic cell, but the number of anode and anode groups in the electrolytic cell cannot be excessive, otherwise It can cause heat imbalance in the electrolysis process.
• the single-cell electrolytic cell has a low single-cell capacity, generally lt/d, low current efficiency, high energy consumption, generally 15000 ⁇ 17000 kWh/t, and the space utilization rate of the electrolytic cell is low, resulting in aluminum busbars, electrolytic cells and The plant covers a large area of investment and the production cost is high. Summary of the invention
• the present invention aims to provide a magnesium chloride electrolysis device having a high single-tank capacity and low energy consumption.
• Another object of the present invention is to provide a method of producing magnesium metal by electrolytic magnesium chloride.
• a magnesium chloride electrolysis apparatus comprising a magnesium chloride electrolysis cell in which one or more carbon independent electrodes are inserted at an intermediate distance from an electrolysis chamber formed between a single set of cathodes and anodes of a magnesium chloride electrolysis cell.
• a large separation between the individual electrodes, between the independent electrode and the anode, and between the independent electrode and the cathode is ⁇ 4.5 mm.
• the large separation between the independent electrodes, between the independent electrode and the anode, and between the independent electrode and the cathode is ⁇ 5.5 mm.
• the large separation between the independent electrodes, between the independent electrodes and the anode, and between the independent electrodes and the cathode is 4.5 _ 5.5 mm.
• the number of independent electrodes inserted in the electrolytic chamber formed between the cathode and the anode is 1 _ 5 .
• a sealing cover is disposed above the electrolytic cell.
• the present invention also provides a method for producing magnesium metal by electrolytic magnesium chloride, which adopts the above electrolysis device, and the voltage between the anode and the cathode is 10 - 12V, and the electrolysis current intensity of the electrolytic cell is 190 ⁇ 165kA, electrolysis temperature is 653 - 657 °C.
• the production capacity of the monopolar electrolytic cell can be multiplied under the same current, the space utilization efficiency of the electrolytic cell is improved, and the single-slot production capacity is greatly improved, since the independent electrode does not need to be connected to the aluminum bus bar. Significantly reduced investment in aluminum busbars, electrolyzers and plant space.
• Embodiment 1 is a schematic cross-sectional structural view of Embodiment 1 of the present invention.
• Figure 2 is a schematic cross-sectional view showing a second embodiment of the present invention.
• Figure 3 is a schematic cross-sectional view showing a third embodiment of the present invention.
• Figure 4 is a schematic cross-sectional view showing a fourth embodiment of the present invention
• Figure 5 is a schematic cross-sectional view showing a fifth embodiment of the present invention.
• a magnesium chloride electrolytic cell having a size of 6000 mm X 4500 mm X 3830 mm, 12 sets of cathode 2 and anode 3 are provided, and a sealing cap 5 is provided on the magnesium chloride electrolytic cell.
• Two carbonaceous independent electrodes 4 were inserted equidistantly between each set of anodes and anodes, and the distance between the cathode 2 and the individual electrodes 4, between the anode 3 and the individual electrodes 4, and between the individual electrodes 4 was 5 mm.
• the DC voltage between the cathode 2 and the anode 3 was 10 V
• the electrolysis current of the electrolytic cell was 165 kA
• the electrolysis temperature was 653 °C.
• the cathode 2 and the anode 3 are electrically connected to the DC power source 1 .
• the electrolysis device With the electrolysis device, the following economic indicators are obtained: The average single tank capacity is 2.8 t/d metal magnesium, and the energy consumption is 11,000 kwh/t.
• a magnesium chloride electrolytic cell having a size of 6000 mm 4500 mm and 3830 mm
• 12 sets of cathode 2 and anode 3 are provided in a magnesium chloride electrolytic cell having a size of 6000 mm 4500 mm and 3830 mm.
• a carbon independent electrode 4 is inserted equidistantly between each group of anodes and anodes, and the distance between the cathode 2 and the individual electrode 4, between the anode 3 and the individual electrode 4, and between the independent electrodes 4 is 4.5 mm.
• the DC voltage between the cathode 2 and the anode 3 was 12 V
• the electrolysis current of the electrolytic cell was 190 kA
• the electrolysis temperature was 657 °C.
• the cathode 2 and the anode 3 are electrically connected to a DC power source 1.
• a magnesium chloride electrolytic cell having a size of 6000 mm X 4500 mm X 3830 mm
• 12 sets of cathode 2 and anode 3 are provided.
• Four carbonaceous independent electrodes 4 were inserted equidistantly between each set of anodes and anodes, and the distance between the cathode 2 and the individual electrodes 4, between the anode 3 and the individual electrodes 4, and between the individual electrodes 4 was 5.5 mm.
• the DC voltage between the cathode 2 and the anode 3 was 11 V
• the electrolysis current of the electrolytic cell was 180 kA
• the electrolysis temperature was 655 °C.
• the cathode 2 and the anode 3 are electrically connected to a DC power source 1.
• a magnesium chloride electrolytic cell having a size of 6000 mm X 4500 mm X 3830 mm
• 12 sets of cathode 2 and anode 3 are provided.
• Five carbon independent electrodes 4 were inserted equidistantly between each group of anodes and anodes, and the distance between the cathode 2 and the individual electrodes 4, between the anode 3 and the individual electrodes 4, and between the independent electrodes 4 was 5.5 mm.
• the DC voltage between the cathode 2 and the anode 3 was 11 V
• the electrolysis current of the electrolytic cell was 185 kA
• the electrolysis temperature was 656 °C.
• the cathode 2 and the anode 3 are electrically connected to a DC power source 1.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Electrolytic Production Of Metals (AREA)

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Citations (8)

• 2011
  • 2011-01-07 CN CN2011200062654U patent/CN201850313U/zh not_active Expired - Lifetime
• 2012
  • 2012-01-05 RU RU2012143463/02U patent/RU132804U1/ru active
  • 2012-01-05 WO PCT/CN2012/070062 patent/WO2012092868A1/zh active Application Filing
  • 2012-05-01 UA UAU201304136U patent/UA84460U/ru unknown

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