Slag removal device and method for lower inserted magnesium electrolytic cell

Abstract

The invention belongs to the field of non-ferrous metal metallurgy, and discloses a lower-insert electrolytic magnesium cell deslagging device and a deslagging method. The device comprises an L-shaped support, a push rod, a scraper and a guiding mechanism, wherein the L-shaped support comprises a handrail section and a working section connected with the handrail section; the guiding mechanism is arranged on the working section; the push rod is arranged in the guiding mechanism; the scraper is connected with the external end part of the push rod; a pulley system is arranged on the L-shaped support, and is connected with the push rod; the push rod can make a telescopic motion along the guiding mechanism under driving of the pulley system. According to the deslagging device, the push rod can make telescopic motion by utilizing driving of the pulley system, so that the scraper can go deep to the bottom of an electrolytic cell to remove residues at the circulating port, and the problem that a traditional long hook cannot be put into each graphite electrolytic hole can be solved, so that, on the one hand, the labor operation intensity can be reduced, and the electrolysis current efficiency can be greatly improved; and on the other hand, the device is applicable to multi-stage slots and has a practical application value.

Description

technical field [0001] The content of the invention belongs to the field of non-ferrous metal smelting, and in particular relates to a novel device and method for removing slag at the bottom of a magnesium electrolytic cell. Background technique [0002] Magnesium electrolysis is an important method to produce metal magnesium, especially for enterprises that jointly produce sponge titanium with magnesium and titanium, it is the key to establish a magnesium-chlorine cycle. At present, electrolytic cells without partitions and multi-stage cells are the main equipment for magnesium electrolysis, and according to the position of the anode in the electrolytic cell, the electrolytic cell can be divided into upper slots, lower slots and side slots, and the lower slots for anodes Electrolyzer technology has been developed due to the fact that graphite electrodes are not in contact with the air, greatly extending their service life. However, the insertion of the lower anode from the...

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Problems solved by technology

However, the insertion of the lower anode from the electrolytic cell severely compresses the space at the bottom of the electrolytic cell, making it difficult to remove the residue generated by electrolysis. The groove structure of the magnesium chamber is used for production, and the space of the magnesium collecting chamber is further reduced, resulting in that the electrolytic residue between the electrodes cannot be removed in a timely and effective manner. When it accumulates near the cathode, on the one hand, it will cause the accumulation of magnesium to deteriorate, resulting in a decrease in current efficiency, and on the other hand On the one hand, magnesium and electrolytic slag are mixed together to cause their own conductivity, which can easily cause a short circuit between cathode and anode, resulting in local electrode current overload, and even leakage caused by electrode overheating.

[0003] At present, the removal of magnesium electrolytic residue is mainly through an L-shaped right-angled slag picking device to hook the electrolytic residue between each anode to the magnesium collection chamber, and then remove it by grabbing or pumping slag, but the space of the magnesium collection chamber is limited. The influence of the graphite electrode at the bottom of the electrolytic cell makes it difficult to operate the slag removal device, and it is difficult to remove the residue at the bottom of the electrolytic cell. The extended hook cannot be placed between the graphite electrolytic holes, which seriously affects the smooth operation of magnesium electrolysis.

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