Method for cleaning electrolyte in the bottom of residual electrolysis anode

Abstract

The present invention is method for cleaning electrolyte in the bottom of residual electrolysis anode. The cleaning plant includes a residual anode conveying catenary chain bogie, a No. 1 electrolyte cleaning unit, a front approach switch, a bogie stopper, a No. 2 electrolyte cleaning unit, a back approach switch, a cleaning PLC controller, a No. 1 cleaning frequency variator and a No. 2 cleaning frequency variator. The cleaning process includes the following steps: inducing, signal transmission, confirming, transmitting command and cleaning. The present invention has high electrolyte cleaning effect, effective raising of anode quality, lowering of the ash and sodium content in anode, capacity of raising the antioxidant capacity of anode and capacity of prolonging the service life of anode.

Description

technical field [0001] The invention relates to a method for cleaning residual electrolyte, in particular to a method for cleaning residual electrolyte at the bottom of an electrolytic anode butt. Background technique [0002] A large number of impurities in the prebaked anode are brought by the residual electrode, and the electrolyte carried by the residual electrode contains a large amount of cryolite (Na 3 ALF 6 ) and alumina (AL 2 o 3 ), and some salts of Ca, Mg, and Li. If the residual electrode is not cleaned cleanly, the sodium content of the residual electrode will be as high as 1200PPpm. After entering the anode production line, it will directly affect the CO of the anode. 2 Activity, resulting in high anode unit consumption, intensified selective oxidation, and serious anode slag drop, which directly affects the cost of electrolytic production and the working environment of the electrolytic cell. At the same time, the impurity elements...

AI Technical Summary

Problems solved by technology

In the production of aluminum electrolysis, the amount of anode residue accounts for 20%-30% of the dry material in the raw anode formula. During the oxidation reaction process of the electrolytic cell, some electrolyte penetrates into the inside of the residue, so that the residue can be reused in the process of reuse. The high content of ash and sodium will affect the oxidation resistance of the carbon anode, and it will also bring the electrolyte to the carbon production line to affect the cleanliness of the anode

At present, the cleaning method dedicated to cleaning the bottom of the residual pole has not been recorded

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