Melter/holder control system
US5242155A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1992 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | May 11, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27M2001/012
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.