Zone-controlled large-scale soaking pit furnace

Abstract

The invention discloses a zone-controlled large-scale soaking pit furnace. The soaking pit furnace is sequentially divided into a first zone, a second zone, a third zone and a fourth zone along a direction perpendicular to a plane of a furnace door toward the interior of the furnace; the width of the third zone is equal to the width of the fourth zone; the sum of the widths of the first zone and the second zone is equal to the width of the third zone; a first temperature control module is arranged in the first zone; a second temperature control module is arranged in the second zone; the firsttemperature control module is provided with a first temperature-sensing element and a first heater; and the second temperature control module is provided with a second temperature-sensing element anda second heater. The ratio of the width of the first zone to the width of the second zone is 0.5 to 1. The first temperature control module and the second temperature control module are connected ontoa walking beam, and the walking beam crosses the first zone and the second zone. The zone-controlled large-scale soaking pit furnace provided by the invention is adopted for compensating heat loss near the furnace door, and the temperature of the zone near the furnace door is adjusted specifically, so that the quality of ingot castings is ensured.

Description

technical field [0001] The invention relates to the field of soaking furnaces, in particular to a large-scale soaking furnace controlled by zones. Background technique [0002] The microstructure homogenization heat treatment of large aluminum alloy ingots is usually carried out in a rectangular box-type furnace. Since the ingot is very long, generally about six meters long, and some even as long as seven meters, so in the length direction of the furnace, there must be Divided into three zones for heat treatment heating. Because the heating condition of the area near the furnace door is poor and heat dissipation is high, the temperature of the end of the ingot, that is, the part close to the furnace door, is always three to five degrees lower than other parts during the entire heating and heat preservation process. This has almost become a common problem in large homogeneous furnaces, so the temperature uniformity of the final ingot can only reach ±5°C. For high-quality alu...

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Problems solved by technology

This has almost become a common problem in large homogeneous furnaces, so the temperature uniformity of the final ingot can only re

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