Melter/holder control system

Details Melter/holder control system Melter/holder control system

1992-05-11

1993-09-07

Kastler, Scott

Metallurgical apparatus

With control means responsive to sensed condition

With temperature sensor

266242, C22B 2100

Patent

active

052421554

ABSTRACT:
A reverberatory aluminum melting/holding furnace is formed of an enclosure for containing a molten metal bath in which a workload to be processed is immersed, a plurality of gas-fired burners for heating the metal bath, and a control system for measuring heat absorbed by the furnace refractory so as to rapidly bring the furnace to a pre-set metal bath temperature without any significant overshoot. The enclosure has a wall layer of insulating refractory material disposed on its interior. The control system includes a first thermocouple element disposed adjacent the "hot face" of the wall layer, and a second thermocouple disposed adjacent the "cold face" of the wall layer. The plurality of gas-fired burners are switched from a "high fire" to a "low fire"/off condition in response to the temperatures sensed by the first and second thermocouple elements prior to reaching of the pre-set metal bath temperature. As a result, the heat stored in the refractory is allowed to heat the metal bath up to the pre-set temperature after the plurality of burners have been switched to the "low fire"/off condition.

REFERENCES:
patent: 2543388 (1951-02-01), Urquhart
patent: 3625421 (1971-12-01), Garrison
patent: 4484947 (1984-11-01), Marshall

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