| 摘要 |
<p>High-temperature rotary drum furnace comprising a central tubular part (1) which is mounted rotationally movably about its longitudinal axis between two fixed end parts (2, 3), characterised in that the central tubular part (1) comprises an external metal support tube (9), a refractory metal internal tube (10), a thermal insulation (11, 12, 13) between said tubes, and means (14) of support between the external tube and the internal tube for allowing the external tube to support the internal tube while allowing a differential expansion of the two tubes in the radial direction and in the longitudinal direction. <IMAGE></p> |
