Online monitoring system of alumina concentration in aluminum electrolytic cell
Jiaqi Wang, Yixin Yin, Lu Zhang, Gaoqi Xiao, Jiarui Cui, Sen Zhang · 2016
An online monitoring system of alumina concentration in aluminium electrolysis has been designed directing at the difficult concentration measurement of alumina. Firstly, a current-measuring instrument with anodic guide rod is developed to collect data about the temperature of anodic guide rod and isometric pressure drop. Then a set of upper-computer software based on COM technology is produced, which consists of OPC server and OPC client software. Eventually, preliminary analysis on the collected data is conducted, least-square support vector machine algorithm optimized by particle swarm is applied to take the training and prediction regarding alumina concentration. Thus achieving the online real-time display of alumina concentration, with mean absolute measuring error reaching 2.631%, which is instructive and meaningful to electrolytic aluminium production process.