Patent ID: 9115414
Filing Date: 2015-08-25
Classification: C21D,F27B,F27D

Abstract:
1. A retort furnace for heat or thermochemical treatment designed for technological process in a protective gas atmosphere, a process gas atmosphere or in a vacuum, and used at least for annealing pipes made of austenitic alloys, the retort furnace comprising: a cylindrical outer body having a lid equipped with an active thermal barrier; a cylindrical retort made of at least one of: i) steel, ii) heat-resisting alloys, and iii) creep-resisting alloys, the cylindrical retort separating a processing atmosphere from an ambient atmosphere; a thermal insulation disposed outside of the cylindrical retort; a heating system located in the thermal insulation; a cooling system including a plurality of air blowers and two top hatches for each of the plurality of air blowers, the top hatches and the plurality of air blowers being disposed on opposite ends of the cylindrical retort; and a barrier temperature sensor extending through the lid, wherein