Low effect manufacturing method for aluminum cell

Abstract

The invention relates to a production process for an aluminum electrolytic tank, in particular to a low-effect production process for aluminum electrolytic tanks, which comprises a tank controller and an up-level unit. The process comprises: 1) adjusting the controlling parameters of the alumina concentration; 2) adjusting the effect-pretreating module and the effect-waiting-period treating module; 3) waiting for eliminating the anode effect. The benefits with the invention are: as the effect-waiting mechanism is canceled in the computer-controlled program, and tech conditions for the electrolytic tank are configured reasonably, steady production of the electrolytic tank is kept; and the low alumina concentration can be kept continuously; while maintaining high current efficiency, occurrence of effect is avoided to the max. extent. The coefficient of effect is reduced to below 0.001 times / tank is multiplied by day at present, the production of low anode-effect coefficient is realized for aluminum electrolytic tank, and null-effect production is realized gradually. The invention is applicable for controlling the low anode-effect system for aluminum electrolytic tank.

Description

technical field [0001] The invention relates to a production method of an aluminum electrolytic cell, in particular to a low-effect production method of an aluminum electrolytic cell. Background technique [0002] At present, the control of the anode effect of domestic aluminum electrolytic cells adopts intelligent fuzzy control technology, that is, the rule of over-under analysis. The input is the characteristic (language) variable of the three stages (normal, under, over) of the characteristic curve, and the output is the concentration High and low (linguistic variable), used to judge the alumina concentration area of ​​the operation. However, due to the unreasonable setting of the parameters of the tank control machine, the oxygen concentration in the electrolytic tank is relatively high, resulting in more sedimentation at the bottom of the furnace. In addition, in order to regularly clean up the deposits on the bottom of the furnace and clear the electrolyte, the waitin...

AI Technical Summary

Problems solved by technology

When the anode effect occurs, a large amount of electric energy is input into the electrolytic cell in a short period of time, causing the temperature of the electrolyte to rise rapidly by about 20°C, which greatly affects the technical and economic indicators of electrolytic production and the service life of the lining material of the electrolytic cell

The anode effect is also accompanied by adverse consequences such as stirring the aluminum water when the anode is extinguished, reducing the current efficiency, increasing the electrolysis temperature and increasing the volatilization of fluoride salts.