Dynamic control of remelting processes

Details Dynamic control of remelting processes Dynamic control of remelting processes

1999-02-03

2000-09-05

Hoang, Tu Ba

Industrial electric heating furnaces

Arc furnace device

Ingot remelting

373 50, 373102, 373105, H05B 7144, H05B 7148

Patent

active

061154040

ABSTRACT:
An apparatus and method of controlling a remelting process by providing measured process variable values to a process controller; estimating process variable values using a process model of a remelting process; and outputting estimated process variable values from the process controller. Feedback and feedforward control devices receive the estimated process variable values and adjust inputs to the remelting process. Electrode weight, electrode mass, electrode gap, process current, process voltage, electrode position, electrode temperature, electrode thermal boundary layer thickness, electrode velocity, electrode acceleration, slag temperature, melting efficiency, cooling water temperature, cooling water flow rate, crucible temperature profile, slag skin temperature, and/or drip short events are employed, as are parameters representing physical constraints of electroslag remelting or vacuum arc remelting, as applicable.

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