RESISTANCE ELECTRIC PIT-TYPE HEATING FURNACE Russian patent published in 2009 - IPC C21D1/76 F27B1/09 F27B5/04 

FIELD: mining.

SUBSTANCE: resistance electric furnace consists of heating chamber mounted on base; heating chamber includes pressure tight case with lining, heaters, muffle and cover wherein openings are made for passage of mechanism for transfer of parts and environment control pipe; also electric furnace consists of adaptor assembled under bottom opening of muffle; adaptor is equipped with pressure tight gate; further, cooling chamber is installed under pressure tight gate; cooling chamber corresponds to removable capacity with cooling working medium enveloped with water jacket; cooling chamber is pressure tight connected with muffle by means of adaptor; notably, muffle in its upper part is shut off with partition installed with heat insulating gap from cover; pipe for controlled medium and guide for mechanism of parts transfer are secured in partition; also at least part of thermo-insulating gap is filled with layer of elastic lining. The cover is made in form of a disk with a mounted device for fixation of parts, while the layer of lining is produced on base of fire resistant mineral cotton.

EFFECT: simplification of furnace design, reduced heat losses and increased operational life of muffle.

3 cl, 1 dwg