Electrolytic cathode containing titanium boride-carbon coating, and preparation method thereof

Abstract

The invention discloses an electrolytic cathode containing a titanium boride-carbon coating, and a preparation method thereof. The electrolytic cathode is characterized in that: a coating is coated on the surface of the electrolytic cathode, wherein the coating comprises components of, by mass: 20 to 22% of TiB2, 15 to 20% of epoxy resin, 24 to 27% of diethylene triamine, 0.3 to 0.8% of carbon fiber, and balance of graphite powder. The preparation method of the aluminum electrolytic cathode comprises steps that: the materials are sufficiently mixed and uniformly coated on the surface of the electrolytic cathode; the coating is heated from normal temperature to 150 DEG C, such that the coating is cured, and the electrolytic cathode containing the titanium boride-carbon coating is obtained.According to the invention, good wettability of aluminum liquid and the electrolytic cathode is utilized, such that aluminum oxide deposition is not easy to be left on the surface of the electrolyticcathode. Therefore, deposition or crusting is not easy to occur, current is uniformly distributed, disturbance of magnetic fields to the aluminum liquid is reduced, current efficiency is improved, energy consumption is reduced, the service life of an electrolyte tank is prolonged, and aluminum liquid level and polar pitch can be appropriately reduced. With the electrolytic cathode provided by theinvention, an average working voltage and a secondary reaction probability of the aluminum electrolyte tank are reduced, aluminum electrolytic production is improved, and the quality of aluminum products is improved.

Description

technical field [0001] The invention relates to an electrolysis cathode, in particular to an electrolysis cathode with a titanium boride-carbon coating, and belongs to the technical field of electrolysis. Background technique [0002] The cryolite-alumina molten salt electrolysis method is the only smelting method in the aluminum industry today. The current carbon cathode does not wet the molten metal aluminum. Aluminum liquid, because the metal aluminum liquid is a conductive fluid in the tank, under the action of a strong magnetic field, electromagnetic force is induced in the conductive fluid, causing the aluminum liquid to flow, fluctuate and bulge, which not only makes it necessary to maintain a high level between the cathode and the anode The pole distance increases the secondary reaction loss of aluminum, reduces the current efficiency, and increases the unit consumption of DC power. In addition, the surface of the carbon cathode is easy to form sedimentation at ...

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Problems solved by technology

[0002] The cryolite-alumina molten salt electrolysis method is the only smelting method in the aluminum industry today. The current carbon cathode does not wet the molten metal aluminum. Aluminum liquid, because the metal aluminum liquid is a conductive fluid in the tank, under the action of a strong magnetic field, electromagnetic force is induced in the conductive fluid, causing the aluminum liquid to flow, fluctuate and bulge, which not only makes it necessary to maintain a high level between the cathode and the anode The pole distance increases the secondary reaction loss of aluminum, reduces the current efficiency, and increases the unit consumption of DC power

In addition, the surface of the carbon cathode is easy to form sediment at the bottom of the tank, which causes the increase of the cathode voltage drop, uneven current distribution, unstable production, and eventually leads to expansion and damage of the cathode, which affects the normal life of the electrolytic cell.

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