| 摘要 |
PCT No. PCT/EP83/00022 Sec. 371 Date Sep. 21, 1983 Sec. 102(e) Date Sep. 21, 1983 PCT Filed Feb. 1, 1983 PCT Pub. No. WO83/02661 PCT Pub. Date Aug. 4, 1983.A preheating furnace for elongated material, particularly bars, billets, and the like of light metal has a furnace tunnel (15) formed by furnace shells (14) for preheating the material (1). At least in their central range the furnace shells are covered by a heat insulation which comprises removably designed insulation members (54,56). The insulation members (54,56) are drawn upwardly above the furnace shells (14) forming an exhaust gas duct (32) in which the furnace tunnel is integrated. Thus a heat insulation for the preheating furnace is provided which is easy to assemble and disassemble and considerably improves the utilization of the heat energy.
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