| 摘要 |
<p>Sliding plate (I) contg. a hole and located in a frame, esp. for use between two other plates to form a sliding stopper on the outlet nozzle of a metallurgical vessel. The improvement is that the sliding frame has >=1 section which can be moved away from or towards the frame, and is used to retain (I). The sides of (I) and its frame pref. diverge towards the hole, and the frame has contact surfaces locating (I). The frame pref. has one removable long side located via a tongue and groove with play to permit the thermal expansion of the long side. (I) pref. also has gas inlet channels leading to a porous zone employed for distribution of the gas. One side of the sliding frame is held in place by bolts employed to retain (I) instead of using a cement which may crumble during service.</p> |
