| 摘要 |
PURPOSE:To increase a heating-up speed of a material to be heated, and also to elevate thermal efficiency of heating, by making high temperature gas which has jet-heated the material to be heated pass through a gas permeable partition, heating it, and utilizing radiation heat from the partition, which has become a high temperature, for heating. CONSTITUTION:In a heating chamber 10 in a furnace wall 2 of a strip heating furnace 1, high temperature furnace atmosphere gas heated by heating devices 6a, 6b by operating high temperature fans 7a, 7b is blown to a material to be heated W consisting of a strip, which is running, from jet ports 5a, 5b. The high temperature gas forcibly convects and heats the material to be heated W by means of collision, and after that, passes through partitions 9a, 9b, goes into chambers 3a, 3b from suction ports 8a, 8b through circulating paths 11a, 11b, and is used circularly. The partitions 9a, 9b are formed by a porous and gas permeable solid consisting of a refractory body of a metal or ceramics, etc., and have an extremely large substantial surface area and convection heat-transfer coefficient. |
