Adaptive control for reheat furnace

Details Adaptive control for reheat furnace Adaptive control for reheat furnace

1993-09-28

1999-02-23

Kastler, Scott

Metal treatment

Process of modifying or maintaining internal physical...

With measuring, testing, or sensing

266 87, C21D 154

Patent

active

058739599

ABSTRACT:
A method of controlling a reheat furnace to deliver pieces at an aim discharge temperature comprises the steps of determining the ratio between calculated reheat furnace discharge temperatures and measured temperatures of pieces in a rolling mill receiving the output of the reheat furnace, filtering this ratio based upon time in the rolling mill to provide the current filtered relationship between calculated discharge temperatures and said measured temperatures to provide filtered ratios, comparing desired temperatures in the rolling mill with said measured temperatures of pieces in the rolling mill to establish error values, filtering the error values based upon time in the mill to provide filtered error values, and processing the filtered error values and the filtered ratios to establish a short-term bias to the aim extract temperature.

REFERENCES:
patent: 3868094 (1975-02-01), Hovis
patent: 4606529 (1986-08-01), Tooch
"Automatic slab heating control at Inland's 80-in. hot strip mill", Timothy A. Veslocki et al., AISE Year Book, Dec. 1986, pp. 577-584.

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