| 摘要 |
Median convection apparatus of annealing furnace intervened between heat-treated material such as many coils (2, 2') located into heat treatment furnace, is provided. The convection apparatus comprises several convection halls arranged in same distance and upper plate (4) having central hall (S) thereon; lower plate (6) which is located in such a way that it is symmetrical to the upper plate (4), has several convection halls in places corresponding to the convection halls and has another central hall (H') with smaller diameter than central hall of upper plate; and separator (10) which consists of a plurality of first separator (12) and a plurality of second separator (14) projected from outer peripheries of upper and lower plates (4, 6) having the same radius, and which is formed in a fixed state between upper and lower plates.
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