Method for cleaning electrolyte in the bottom of residual electrolysis anode

Abstract

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. The present invention includes a catenary trolley for transporting residual poles, 1# electrolyte cleaner, front proximity switch, trolley stopper, 2# electrolyte cleaner, rear proximity switch, cleaner PLC controller, 1# cleaner frequency converter and 2# The cleaning device is composed of a frequency converter, and the cleaning method includes an induction step, a signal transmission step, a confirmation step, an instruction step, and a cleaning step. The present invention has the following beneficial effects: Since the present invention adopts an advanced method for cleaning the electrolyte at the bottom of the residual electrode, the cleaning degree of the electrolyte at the bottom of the residual electrode can reach more than 90%, which can effectively improve the quality of the anode and improve the cleanliness of the residual electrode , reducing the content of ash and sodium in the anode, not only improving the oxidation resistance of the carbon anode, but also prolonging the service life of the anode. The invention can be applied to the electrolytic aluminum carbon production industry in the non-ferrous industry.

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 3O 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 Ca, Fe, Mg, Si and other impurity elements...

AI Technical Summary

Problems solved by technology

In the production of aluminum electrolysis, the amount of anode remnants accounts for 20%-30% of the dry material in the raw anode formula. During the oxidation reaction process of the electrolytic cell, some electrolytes penetrate into the inside of the anode remnants, making the anode remnants 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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