The invention discloses a continuous graphitizing ultra-high temperature
tube furnace, whose heating
working temperature falls within a range of 2200-2800 DEG C. A structure of the continuous graphitizing ultra-high temperature
tube furnace comprises a
muffle furnace hearth, a protective tube, a heat insulation
refractory layer and a furnace shell. A
graphite muffle furnace hearth is tubular, is divided into three temperature areas and is an unique heating body.
Water cooling copper electrodes are mounted at two ends of the
muffle furnace hearth; the protective tube with an adjusting device is arranged outside the muffle furnace hearth; the protective tube is positioned between the muffle furnace hearth and the heat insulation
refractory material; and the axis of the protective tube can be adjusted by the adjusting device. A heat
insulation system, which is formed by a soft
graphite felt, a soft felt, a carbon / carbon
composite material and other materials, is arranged in a furnace body; the airtight furnace shell with a
water cooling steel structure is arranged outside the heat
insulation system; the
water cooling furnace shell comprises a plurality of independent
water cooling chambers; and the chambers are respectively used for cooling different areas of the furnace body. The continuous graphitizing ultra-high temperature
tube furnace disclosed by the invention has the advantages of high working
furnace temperature, uniform and stable temperature field, less muffle furnace hearth
surface heat accumulation phenomenon, long muffle furnace hearth service life, simple structure, easiness for
machining and so on.