F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
F27B 3/28 (2006.01) C22B 21/00 (2006.01) F27B 3/20 (2006.01) F27D 19/00 (2006.01)
Patent
CA 2071742
ABSTRACT OF THE DISCLOSURE 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.
Bargar John
Roberts Rich
Thomlinson Gordon
Bargar John
Bereskin & Parr
Roberts Rich
Seco/warwick Corporation
Thomlinson Gordon
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