Device for generating metal magnesium by electrolyzing magnesium chloride

Abstract

The invention relates to the field of magnesium chloride electrolysis and particularly discloses a device for generating metal magnesium by electrolyzing magnesium chloride. The device comprises a temperature control system, a liquid level control system and an electrolytic tank; a clapboard is arranged in the electrolytic tank to divide the upper part of the electrolytic tank into an electrolytic chamber and a magnesium collection chamber; a plurality of groups of carbon anodes and iron cathodes are installed in the electrolytic chamber; a plurality of bipolar electrodes are inserted between the anodes and the cathodes; a supporting plate is arranged at the lower part of the electrolytic chamber and is provided with an electrolyte circulation hole; a slag storage chamber is arranged below the supporting plate; and a sealing cover is arranged on the electrolytic chamber. The device of the invention has the beneficial effects that as the device for generating the metal magnesium by electrolyzing magnesium chloride does not need slag discharge operation, the labor intensity is greatly reduced, the working environment is improved, the oxidation loss of liquid magnesium and the generation quantity of magnesium oxide tank slag are reduced, and the productivity and the electrolysis efficiency of a single tank are improved.

Description

technical field [0001] The application relates to the field of electrolyzing magnesium chloride to produce metal magnesium, in particular to a device for electrolyzing magnesium chloride to produce metal magnesium. Background technique [0002] The process of producing metal magnesium by molten salt electrolysis is widely used in magnesium-titanium joint enterprises of sponge titanium. In the production process of sponge titanium, magnesium chloride is used to reduce titanium tetrachloride to produce sponge titanium, and at the same time, magnesium chloride is produced as a by-product. Magnesium chloride is produced by molten salt electrolysis to produce metal magnesium and chlorine, and metal magnesium is returned as a reducing agent for the production of sponge titanium. When used, the chlorine gas is returned and recycled as the raw material for the production of titanium tetrachloride by adding carbon chlorination to high titanium slag. [0003] The traditional magnesiu...

AI Technical Summary

Problems solved by technology

When the current intensity is too high, because there is no other means of cooling, the temperature of the electrolyte may be too high, the amount of sublimation of the electrolyte may increase, resulting in an increase in the sublimation of the electrolyte, and a decrease in the yield of magnesium; In case of failure, because there is no other heating means, the temperature of the electrolyte may be too low, the viscosity of the electrolyte and liquid magnesium is too low, and the liquid magnesium and chlorine gas cannot be separated in time, resulting in secondary reactions, resulting in a decrease in current efficiency, and may even Cause the solidification of electrolyte and liquid magnesium and stop the tank

[0008] There is insufficient space at the bottom of the traditional monopolar tank and the poor sealing of the electrolytic tank cover. During the electrolysis process, the cover of the magnesium collection chamber needs to be opened to remove the slag. The oxidation reaction of liquid magnesium is serious, and the tank slag (mainly composed of MgO) is relatively large. , resulting in low yield of magnesium, high labor intensity and poor operating environment

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