Accurate aluminum cell baiting feedback information control method

Abstract

The invention relates to an automatic control system of electrolytic bath in aluminum electrolysis industry, in particular to a feedback information control method of precise feeding of aluminum electrolytic bath. The invention is characterized in that the feedback information control method of precise feeding comprises an electrobath control device, a host computer and a feeding feedback device, wherein, the electrobath control device is connected with the host computer via CAN bus; an output end of a signal collecting plate is connected with an input end of the feeding feedback device via CAN bus; an output end of the electrobath control device is connected with the input end of the feeding feedback device via CAN bus; an output end of the feeding feedback device is connected with an input end of a motherboard of the electrobath control device via CAN bus. The invention has the advantages of effective monitoring be means of feeding and crust breaking instruction sent by electrobath control device due to the added the feeding feedback device, real-time voice alarm for feeding faults, timely maintenance, elimination of interference to electrobath control device during manual inspection of feeding and avoidance of anode effect caused by feeding faults.

Description

technical field [0001] The invention relates to an automatic control system for an electrolytic cell in the aluminum electrolytic industry, in particular to a control method for accurate feeding feedback information of an aluminum electrolytic cell. Background technique [0002] The aluminum electrolytic cell is a nonlinear, time-varying, and large-delay system. There is a high-temperature and highly corrosive electrolyte melt in the electrolytic cell. So far, many parameters in the electrolytic cell cannot be measured online for a long time, and the concentration of alumina needs to be sampled on site and in different places. Analysis, the cycle is at least 120 hours, so the production series of large-scale prebaked aluminum electrolytic cells in my country generally use comprehensive analytical tank resistance, tank resistance slope, and R-C curve, and combine the experience of electrolysis experts and the actual experience of field operators to develop A set of alumina conc...

AI Technical Summary

Problems solved by technology

After the electrolytic cell control machine issues a feeding command in normal processing each time, it must go through the execution circuit board of the cell control machine, the electrical circuit, the solenoid valve of the air control cabinet, and the compressed air pipeline to reach the constant volume feeder to control the constant volume of the container. If there is a problem in any link of each device during the feeding operation, the command will be invalid, resulting in a reduction in the feeding volume, resulting in a decrease in the concentration of alumina, destroying the material balance of the electrolytic cell, and causing the occurrence of the anode effect

The control effect is poor and the technical conditions of the electrolyzer deteriorate

More importantly, the slot control machine cannot obtain the feedback signal of the execution of the command, thus changing the strategy and sending out an alarm signal

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