Electrolytic cell aluminum level and electrolyte level height and cell temperature online measuring method

Abstract

The invention discloses an electrolytic cell aluminum level and electrolyte level height and cell temperature online measuring method. According to the method, two equal-height guide rods are insertedinto two levels and aluminum water, voltage is applied at the tail ends of the two guide rods, one guide rod is moved upwards, voltage change of the tail ends of the guide rods is different when thetail ends of the guide rods move in the two levels as the electrical conductivities of the two levels are different, movement time of the movement guide rods in the two levels can be calculated, so that movement tracks of the guide rods are calculated, namely, the heights of two levels are calculated, the height of the aluminum level needs to add the distance between the tail end of the guide rodwithout moving and a cell bottom, and a thermoelectric couple is inserted into electrolyte solution, so that cell temperature is measured. By the method, the heights of the two levels can be accurately measured, the cell temperature can be measured, and the method is quite simple and convenient to maintain.

Description

technical field [0001] The invention relates to an on-line measurement method for aluminum level, electrolyte level and bath temperature of an electrolytic bath. Background technique [0002] The production of aluminum electrolytic cell is to dissolve alumina in molten cryolite (also called electrolyte liquid), and then through direct current, the dissolved alumina will generate aluminum and oxygen under the action of electricity, and the aluminum will remain at the bottom of the cell in liquid form ( There are two layers of liquid aluminum and electrolyte liquid in an electrolytic cell, hereinafter referred to as two levels, because the specific gravity of the aluminum liquid is greater than the electrolyte liquid, so the aluminum liquid is in the lower layer), when the aluminum liquid reaches a certain amount (referred to as the aluminum level Height), it is regularly drawn out by vacuum ladle and sent to the casting process; oxygen reacts with carbon as the anode in the f...

AI Technical Summary

Problems solved by technology

Its main disadvantages are that on the one hand, there are human interference factors in the measurement data, and the fluctuation is large; on the other hand, the required data is carried out manually, the timeliness of the data is poor, the labor intensity is high, and the efficiency is not high (for a production with an annual output of 300,000 tons of aluminum liquid series, such as using a current of 400 kA, about 300 electrolyzers are needed, and the daily measurement workload is very large)

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