Fault real-time detection method for aluminum cell supplying system

Abstract

A malfunction real-time detecting method for an aluminum electrobath discharging system relates to an online monitoring method of the electrobath discharging system operating state and discharging system malfunction in the process of an aluminum electrolysis production. The detecting process is real-time judging the discharging system operating state and discharging system malfunction by a bath-control machine according to the discharging interval, the discharging period and the changing rate of the electrobath resistance as the time, the aluminum oxide concentration changing state parameter; then displaying the malfunction state on the monitoring system and processing broadcast via the workshop vocal broadcast. The method of this invention processes the real-time detection for the discharging system to timely find the discharging system malfunctions so that the discharging system malfunctions can be timely maintained and detected to reduce the influence for the operation of the entire electrobath system caused by the discharging system malfunctions, which enhances the electrobath control effect and achieves the purposes of saving energy and reducing the consumption.

Description

technical field [0001] The invention discloses a real-time detection method for faults of the blanking system of an aluminum electrolytic cell, and relates to an online monitoring method for the operation status of the blanking system of the electrolytic cell and faults of the blanking system during the production process of aluminum electrolysis. Background technique [0002] The electrolytic aluminum industry has experienced many years of development. So far, the electrolytic aluminum production has all adopted the prebaked anode aluminum electrolytic cell technology. For the prebaked anode aluminum electrolytic cell, the addition of alumina is a key link in the production and control of the electrolytic cell, which is completed through the intermediate point feeding system. The operating status of the electrolytic cell feeding system directly affects the control of the concentration of electrolytic alumina and the technical and economic indicators of the entire electrolyt...

AI Technical Summary

Problems solved by technology

Since electrolytic production is carried out in an environment of high temperature, high dust, and strong magnetic field, the failure rate of equipment is relatively high. At present, almost all intermediate point feeding systems do not have an online monitoring system, and all faults are detected by manual inspection.

In this mode of operation, the failure of the feeding system cannot be detected and dealt with in time, and alumina cannot be added to the electrolytic cell according to the requirements of the control system, causing the electrolytic cell to be short of material and causing the anode effect

When the anode effect occurs, the surface tension between the electrolyte and the carbon block increases, which is beneficial to the separation of the carbon residue, makes the electrolyte clear, reduces the resistance, and can supplement the lack of heat in the tank. The electrolysis production management personnel can judge by the frequency of the anode effect Whether the production state of the tank is normal, but at the same time, the occurrence of the anode effect will cause a large amount of electric energy loss (the normal effect voltage can reach 30-40 volts, and the effect lasts for 3-5 minutes. For a 160KA electrolyzer, one effect is only It will waste about 320 degrees of electricity), destroying the conditions for the stable anode production of the electrolytic cell (series of current fluctuations, the electrolysis temperature rises from the normal value of 950 ° C to 990 ° C ~ 1000 ° C, the side of the tank melts and becomes thinner, and the carbon block on the side is increased. The possibility of corrosion, and it takes 50 minutes for the temperature and the side of the tank to basically return to the normal value), the anode effect also produces PFCs that destroy the ozone layer (CF 4 、C 2 f 6 ) gases, they produce a greenhouse effect more than CO 2 The average is about 8000 times higher, which has a very bad impact on the ecological environment, and at the same time causes the loss of fluoride salt in the electrolyte