METHODS AND DEVICES FOR DETECTING ABNORMAL ALUMINA CONCENTRATION AND FOR MONITORING ELECTROLYTE TEMPERATURE IN ALUMINUM ELECTROLYSIS DRIVEN BY PROCESS MECHANISM KNOWLEDGE

摘要

#$%^&*AU2020200691A120200820.pdf#####ABSTRACT The embodiments of the present disclosure provide a method and a device for detecting abnormal alumina concentration and a method and a device for monitoring electrolyte temperature in aluminum electrolysis driven by process mechanism knowledge. The method for detecting abnormal alumina concentration in aluminum electrolysis driven by process mechanism knowledge, comprising: determining a relation between a pseudo alumina concentration and a feed state, according to a distribution of the maximum and minimum values of the pseudo alumina concentration in an integral feed period which is a feed period before anode effect occurs, and includes an overfeed period and an underfeed period; determining a sequence position of a pseudo dissolution hysteresis coefficient in the integral feed period, according to the relation between the pseudo alumina concentration and the feed state, and the distribution of the maximum and minimum values of the pseudo alumina concentration in the integral feed period; determining values of the pseudo dissolution hysteresis coefficient in the integral feed period, according to a difference between the sequence position of the pseudo dissolution hysteresis coefficient and a start sequence position of overfeed in the integral feed period; and detecting whether the alumina concentration is abnormal or not, according to the values of the pseudo dissolution hysteresis coefficient in the integral feed period.2/12 S301 determining a relationship between a pseudo alumina concentration and a feeding state S302 determining a sequence position of a pseudo dissolution hysteresis coefficient in the integral feed period determining values of the pseudo dissolution hysteresis coefficient in the integral feed period Q303 detecting whether the alumina concentration is abnormal or not, according to the values of the pseudo dissolution hysteresisQ-0 coefficient in the integral feed period 9 0 end Figure 3