CN101498012A

CN101498012A - Computer quenching method for aluminum cell anode effect

Info

Publication number: CN101498012A
Application number: CNA2008103002605A
Authority: CN
Inventors: 王愚
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2008-01-30
Filing date: 2008-01-30
Publication date: 2009-08-05

Abstract

The invention discloses a computer extinguishment method for the anode effect of an aluminum electrolytic bath. The method uses a computer to detect and judge the generation of the anode effect, automatically control and execute operations of adding alumina, ascending an anode, waiting and descending the anode and circularly execute the operations of ascending the anode, waiting and descending the anode until the anode effect is extinguished. The invention responds rapidly compared with a manual extinguishment method, can rapidly increase the concentration of alumina in an electrolyte solution below the anode, can impact an air film attached to the surface of the anode, is favorable to the acceleration of anode effect extinguishment and greatly shortens operation time needed for the anode effect extinguishment so as to greatly decrease energy consumption and greatly lighten the labor intensity of operators. The invention can improve the success rate of the anode effect extinguishment, prevents the electrolyte solution from overflowing out of the electrolytic bath, can not waste a great amount of heat and can prevent the high-temperature electrolyte solution from burning a bath cover.

Description

A kind of computer quenching method of aluminum cell anode effect

Technical field

The present invention relates to a kind of extinguishing method of aluminum cell anode effect, particularly relate to a kind of computer quenching method of aluminum cell anode effect.

Background technology

At present, in the Industrial processes of metallic aluminium, anode effect takes place in regular meeting in aluminium cell.The main performance of anode effect is that aluminium cell voltage is elevated to 30～60v suddenly from normal 4.2～4.4v, and occurs electric arc on anode, make the energy of input electrolyzer be the several times increase suddenly, and the temperature of electrolyzer rises rapidly; The major cause that causes its generation is in the production of metallic aluminium, and the alumina concentration in the electrolyte solution below anode is low excessively, and has destroyed the steady electricity supply of whole electrolytic series.Existing solution has two kinds, a kind of is after anode effect takes place, the computer (promptly controlling case) of control electrolyzer can be sounded and the flashing light alarm, the notifying operation personnel arrive in the other and inside aluminum oxide that adds of electrolyzer, and be inserted into below the anode with wooden stick, vigorous stirring aluminium liquid and electrolyte solution, with anode effect terminating, but this method is comparatively consuming time, the a large amount of electric energy of meeting loss in the time period of stirring, operator's working strength is bigger, and this vigorous stirring causes the loss of aluminium liquid in the electrolyzer easily; In order to overcome the shortcoming of hand slaking anode effect, domestic part aluminium manufacturer has adopted a kind of decline anodic method to come automatic going out effect, and its method mainly is the electrolyzer that computerizeds control, after adding aluminum oxide earlier, reduce anode again, wait for a period of time, anode again raises.But this method has two aspect shortcomings, the one, owing to it is conventionally believed that the decline anode, reduced pole span, and with regard to the energy anode effect terminating, and after long-term practice, find to make success ratio in this way not high; The 2nd, the anode that descends pushes the electrolyte solution of high-temperature fusion attitude easily and makes it overflow electrolyzer, has both lost electrolyte solution, and loses heat also can burn out the groove cover again.

Summary of the invention

The objective of the invention is to, providing a kind of can significantly reduce the operating time, cuts down the consumption of energy, can significantly reduce labor intensity of operating personnel, success ratio is higher, can not overflow the extinguishing method of the aluminum cell anode effect of electrolyte solution, to overcome the deficiencies in the prior art.

The present invention is achieved in that it comprises the anode effect that adopts COMPUTER DETECTION and control aluminium cell, arrive the anode effect generation of aluminium cell when COMPUTER DETECTION after, in electrolyzer, add earlier aluminum oxide by computer controlled automatic, decline anode and it is immersed in electrolyte solution after then anode promote being waited for 5～10 seconds, detect the voltage of aluminium cell once more, whether extinguish to judge anode effect, if anode effect is not also extinguished, under the control of computer, circulate successively again to carry out and promote anode, wait for and decline anode step, extinguish until anode effect.

Owing to adopting above-mentioned technical scheme, the present invention is by computer control adding aluminum oxide, and lifting of control anodic and decline, and is rapid with respect to the method response of hand slaking; In addition, through applicant's discovery that studies for a long period of time, the generation of anode effect and the size of pole span influence and little, and major cause one deck air film that to be the anode lower surface form has hindered its works better, so after anode effect takes place, the present invention elder generation holding anode is motionless in electrolyzer, and adding aluminum oxide, and then rising anode, at this moment the salic more electrolyte solution around anode will flow to below the anode originally, and when flowing, play the effect of stirring electrolyte solution, can promptly increase the concentration of aluminum oxide in the electrolyte solution below the anode, simultaneously can wash out the air film that the anode lower surface adheres to, help to accelerate anode effect terminating, make the present invention can significantly reduce the necessary operations time of anode effect terminating (as shown in table 1), thereby significantly cut down the consumption of energy, and can significantly reduce labor intensity of operating personnel with the method operating time correlation data of hand slaking.In addition, the method that the present invention mainly extinguishes is to destroy the concentration of anode lower surface air film that adheres to and the aluminum oxide that increases the anode below, if and anode effect do not extinguish, the present invention will circulate successively and carry out anodic lifting, wait and down maneuver, to improve the success ratio of anode effect terminating.Besides, because the present invention is the anode that descends again behind elder generation's lifting anode, and the volume that immerses electrolyte solution after anode descends is less than or equal to the volume that immerses electrolyte solution before anode promotes, liquid electrolyte solution is extruded and overflows electrolyzer, can not lose electrolyte solution and waste a large amount of heats, more can not make the pyritous electrolyte solution burn out the groove cover.

Table 1

The mode of anode effect terminating	Consuming time
The mode of anode effect terminating	Consuming time	Existing manual operation	8～12 minutes
Computer control of the present invention is operated automatically	1～2 minute	Existing manual operation	8～12 minutes

Embodiment

Embodiments of the invention: the computer quenching method of this aluminum cell anode effect utilizes existing COMPUTER DETECTION anode effect and Controlling System to realize, promptly control the anode effect of aluminium cell by controlling existing equipment, when using existing computer to control the anode effect of aluminium cell, arrive the anode effect generation of aluminium cell when COMPUTER DETECTION after, make computer controlled automatic in electrolyzer, add earlier aluminum oxide, then anode is promoted and make it all leave electrolyte solution in the aluminium cell, wait for after 5～10 seconds the decline anode and it is immersed in electrolyte solution, detect the voltage of aluminium cell once more, whether extinguish to judge anode effect, if anode effect is not also extinguished, under the control of computer, circulate successively again to carry out and promote anode, wait and these three on decline anode extinguish the anodic operation steps, extinguish until anode effect.Overflow electrolyzer in order to prevent liquid electrolyte solution to be extruded, immerse the volume of electrolyte solution after the may command anode descends, and make it be less than or equal to the volume that immerses electrolyte solution before anode promotes.

Claims

The computer quenching method of [claim 1] a kind of aluminum cell anode effect, it comprises the anode effect that adopts COMPUTER DETECTION and control aluminium cell, it is characterized in that: arrive the anode effect generation of aluminium cell when COMPUTER DETECTION after, in electrolyzer, add earlier aluminum oxide by computer controlled automatic, then anode is promoted, wait for after 5～10 seconds the decline anode and it is immersed in electrolyte solution, detect the voltage of aluminium cell once more, whether extinguish to judge anode effect, if anode effect is not also extinguished, under the control of computer, circulate successively again to carry out and promote anode, wait for and decline anode step, extinguish until anode effect.