Heating device and method for graphite anode in rare earth molten salt electrolysis

Abstract

The invention discloses a heating device and method for a graphite anode in rare earth molten salt electrolysis. The heating device comprises an electromagnetic induction heating mechanism and a hostpower supply, and the electromagnetic induction heating mechanism is electrically connected with a host power supply. According to the invention, the electromagnetic induction heating mechanism is arranged; during use, the graphite anode to be heated is firstly placed in the electromagnetic induction heating mechanism, the host power supply is started then, the electromagnetic induction heating mechanism converts electric energy into electromagnetic energy, then the electromagnetic energy is converted into electric energy, and the electric energy is converted into heat energy in the graphite anode, so that the purpose of heating the graphite anode is achieved. The graphite anode generates induction current and emits heat by itself through the electromagnetic induction principle, heat losscaused by heat transfer is reduced, and energy consumption loss is small. In addition, the heating speed is high; the operation is convenient; and operation of a molten salt electrolytic furnace is not influenced.

Description

technical field [0001] The invention relates to the technical field of rare earth molten salt electrolysis, in particular to a heating device and heating method for a graphite anode in rare earth molten salt electrolysis. Background technique [0002] With the rapid development of the field of rare earth functional materials, the demand for rare earth metals is increasing day by day. The common production method of rare earth metals is mainly the molten salt electrolysis method. In the molten salt electrolysis method, metal tungsten is generally selected as the cathode material of rare earth molten salt electrolysis, and graphite is used as the anode material. Losing electrons, the process of losing electrons is called oxidation process. Rare earth ions get electrons on the tungsten rod cathode and are reduced to rare earth metals. [0003] With the progress of the electrochemical reaction, the graphite anode will be consumed and thinned, and it needs to be replaced when it...

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Problems solved by technology

[0003] As the electrochemical reaction progresses, the graphite anode will be consumed and thinned, and it needs to be replaced when it is consumed to a certain extent. The new graphite anode must be heated before use. The heating method of the existing graphite anode is 3- 5 hours above the furnace mouth of the molten salt electrolytic furnace for baking, and the graphite anode needs to be turned over during the baking process to ensure uniform heating. Obviously, this heating method needs to keep the furnace mouth open all the time, resulting in a large loss of energy consumption

[0004] In view of this, the present inventors aimed at the many defects and inconveniences caused by the imperfect heating of the graphite anode in the above-mentioned rare earth molten salt electrolysis, and deeply conceived, and actively researched and improved the trial production to develop and design the present invention

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