Australian mill upgrade exceeds project aims
An
Industrial Automation Services product story
Edited by the Engineeringtalk editorial team
Mar 18, 2005
In October 2004, IAS achieved final acceptance for the five-stand finish mill setup technology upgrade for the 2050mm hot strip mill at BlueScope Steel Western Port, Victoria, Australia.
In October 2004, IAS achieved final acceptance for the five-stand finish mill setup technology upgrade for the 2050mm hot strip mill at BlueScope Steel Western Port, Victoria, Australia.
The advanced hot finishing mill Achieva setup system provides a significantly improved mill setup strategy for calculating processing speeds, interstand tensions and stand thickness reductions and a more sophisticated adaptive model for force, torque, temperature and slip which also incorporates a yield stress model.
The online mathematical model needed to perform this function involves the solution of hundreds of nonlinear algebraic and differential equations and is one of the most demanding automation tasks in a steel plant.
The setup models were developed as a joint effort between IAS and BlueScope Steel staff with the latter providing the yield stress, temperature and friction models.
The system also includes an adaptive threading function which modifies downstream stand references on threading as material hardness and thickness disturbances are detected in the earlier stands, to provide improved thickness performance.
The key objective of the model upgrade was to reduce the number of nonprime coils.
Since the new system was installed and tuned, the total prime coil performance level has exceeded the project aims.
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