公开(公告)号：US20050013339A1

公开(公告)日：2005-01-20

申请号：US10792097

申请日：2004-03-03

申请人： Douglas Miller ,  Werner Ruoff ,  Allan Intermill ,  Stephen Strong ,  Thomas Thoman ,  Richard Shao

发明人： Douglas Miller ,  Werner Ruoff ,  Allan Intermill ,  Stephen Strong ,  Thomas Thoman ,  Richard Shao

IPC分类号： H05B6/10 ,  C01B31/04 ,  D01F9/32 ,  F27B14/06 ,  F27B17/00 ,  F27D1/12 ,  F27D7/06 ,  F27D9/00 ,  F27D11/06 ,  F27D21/00 ,  F27D99/00

CPC分类号： F27B14/061 ,  D01F9/322 ,  F27D2009/0018 ,  F27D2099/002

摘要： An induction furnace capable of operation at temperatures of over 3100° C. has a cooling assembly (60), which is selectively mounted to an upper end of the furnace wall (76). The cooling assembly includes a dome (62), which is actively cooled by cooling water coils (68). During the cool-down portion of a furnace run, cooling initially proceeds naturally, by conduction of heat away from the hot zone through a furnace insulation layer (58). Once the temperature within the furnace hot zone (20) reaches about 1500° C., a lifting mechanism (80), mounted to the dome, raises a cap (16) of the furnace slightly, allowing hot gases from the hot zone to mix with cooler gas in the dome. This speeds up cooling of the hot zone, reducing cool-down times significantly, without the need for encumbering the furnace itself with valves or other complex cooling mechanisms which have to be replaced periodically. The life of a graphite furnace susceptor (10) at the high operating temperature is increased by surrounding the susceptor with a barrier layer (40) of flexible graphite, which inhibits evaporation of the graphite. Additionally, witness disks (154), placed within the susceptor, provide an accurate temperature profile of the hot zone.

摘要翻译： 能够在超过3100℃的温度下操作的感应炉具有冷却组件（60），其被选择性地安装到炉壁（76）的上端。 冷却组件包括由冷却水盘管（68）主动冷却的圆顶（62）。 在炉膛的冷却部分期间，冷却最初自然地通过来自热区的热传导通过炉绝缘层（58）。 一旦炉热区（20）内的温度达到约1500℃，安装在穹顶上的提升机构（80）稍微升高炉膛（16），允许来自热区的热气混合 在圆顶中有较冷的气体。 这加快了热区的冷却，显着降低了冷却时间，而不需要用阀或其他必须定期更换的复杂冷却机构来堵住炉本身。 通过用柔性石墨的阻挡层（40）围绕基座来增加石墨炉基座（10）在高工作温度下的寿命，这抑制了石墨的蒸发。 此外，放置在基座内的见证盘（154）提供热区域的精确温度分布。