Table 1: Description of process variables.

NumberVariablesDescriptionsUnits

1PDI_1Resistance of the lower towerKPA
2LIAS_2Liquid oxygen level of condenser evaporatorMM
3AI_701Argon content of the argon fraction%
4TI_16Temperature of the argon fractionDEGC
5PDI_701Resistance of CAC IMPA
6PIS_701Outlet pressure of CAC IIMPA
7PDI_702Resistance of CAC IIKPA
8FI_702Flow rate of the argon fractionM3/HR
9LIC_701Liquid air level of condenserMM
10AI_705Argon content of the crude argon gas%