| 摘要 |
A pusher type furnace is provided to maintain a predetermined temperature for a furnace by circulating heat inside the furnace, thereby preventing degradation of a heating-up rate for a slab. A pusher type furnace comprises the units. A preheating board preheats a slab(110) for a thick plate and a heating board(100) heats the slab. A soaking zone soaks the slab. A top expansion unit(H2) and a bottom expansion unit(H3) expand the heating board and reduce the preheating board by pushing a border part between the preheating board and the heating board toward the preheating board. The fourth, fifth, sixth, seventh heating torches(200,210,220,230) are installed on the heating board. |
