Method for real-time detection of concentration of aluminum oxide in aluminum cell

Abstract

A method for predicting the concentration of aluminum oxide in an electrobath relates to a real-time control for the concentration of aluminum oxide by using a bath control machine real-time measuring and displaying the concentration of aluminum oxide in an electrobath. The method is characterized in that: the real-time predicting process is using the bath control system and the voltage of the real-time detecting electrobath and system current and controlling the discharging interval, the time and the discharging capacity parameter to build an electrobath operating parameter and a relation mode of the aluminum oxide concentration and then predicting the concentration of aluminum oxide in an electrobath and displaying the real-time aluminum oxide concentration on the bath control machine. The method of this invention is suitable for the intermediate point type discharging pre-bake aluminum electrobath of the 70kA-350kA series. This method can control the prediction of the concentration of aluminum oxide in aluminum and it is beneficial to the production technique and operating stuff to timely know the operating state of the electrobath which is a benefit for the management and control for the production of electrolytic aluminum.

Description

technical field [0001] A method for real-time prediction of the alumina concentration in an aluminum electrolytic cell relates to a real-time measurement and display of the alumina concentration in the electrolytic cell by using a cell control machine, which is used for real-time control of the alumina concentration in the electrolytic cell. Background technique [0002] In the 1980s, people used the limiting current method to measure the concentration of alumina in aluminum electrolysis. At the same time, many scholars also studied the battery potential method to measure the concentration of alumina, but these methods have large errors, high cost, and operability. Factors failed to promote application. The question of alumina concentration has temporarily lost its urgency since the alumina concentration was controlled in terms of dR / dt. At present, almost all aluminum electrolytic cells with intermediate point feeding use dR / dt to control the alumina concentration. This c...

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Problems solved by technology

[0002] In the 1980s, people used the limiting current method to measure the concentration of alumina in aluminum electrolysis. At the same time, many scholars also studied the battery potential method to measure the concentration of alumina, but these methods have large errors, high cost, and operability. Factors failed to promote the app

However, this kind of control fails to take the alumina concentration as the control target, and it is difficult for people to organically combine the alumina concentration and the control parameters when adjusting the control parameters.