The utility model relates to a graphite electrolytic cell, which relates to an electrolytic cell used for smelting rare earth metals. The main is to solve the problems of rare earth metal graphite electrolytic bath existing contact air directly on the inside of the upper part of rare earth metal smelting, under the condition of high temperature oxidation burning problem of. The invention is mainly in the rare earth metal graphite electrolytic bath with high temperature resistant upper inside protection metal cover, protective cover on the outward along the graphite cell volume will cover the upper, high metal protective cover is approximately equal to the depth of 1/3 graphite cell. The advantages of upper inside of the graphite electrolytic tank and air insulated, which is not oxidation under high temperature conditions, can prolong the service life of 3-4 times.
The main equipment of electrolytic tank, can be divided into two types: diaphragm electrolyzer and diaphragm cell. Diaphragm electrolyzer can be divided into to the membrane (asbestos), ion-exchange membrane and solid electrolyte membrane (such as beta -Al2O3) form; non membrane electrolytic cell is divided into mercury electrolyzer and oxidation electrolytic tank.
Electrolyzer used in industry by tank, electrolyte, anode and cathode. The most used diaphragm separates the anode chamber and a cathode chamber. According to the difference of the electrolyte, it can be divided into three kinds: the water electrolysis cell, the molten salt electrolysis cell and the non-aqueous solution electrolysis cell. When the direct current passes through the electrolytic cell, the oxidation reaction occurs at the interface between the anode and the solution. It is the key to improve the current efficiency, reduce the voltage and save the energy consumption to optimize the structure of the cell and select the electrode and the diaphragm material.