| 摘要 |
Disclosed is a sliding gate valve employed on the side of a furnace as a furnace valve, in which the mechanism is so structured that the shut off occurs by directing the slide gate to the up position rather than the down position. In addition, to facilitate a reduction in space at the slide gate, the slide gate is desirably configured to be asymmetrical, with the short end extending upwardly from the pour opening in the nozzle. A refractory lined heat shield protects the sliding gate carrier and also serves to mount a collector extension when used. More specifically, the slide gate is provided with a metallic frame which retains a monolithic refractory into which errosion resistant refractory inserts or preformed members are cast. Means are desirably provided to remove the spent refractory for remanufacture thereby reclaiming the casting. Similarly in the top plate, means are provided for remanufacture and for facilitating proper orientation of errosion-resistant refractory inserts such as zirconium oxide in the manufacture of the stationary plate. The top plate is symmetrical to provide full travel pressure face relationship with the sliding gate. Both the stationary plate and slide gate casing have spring pad back up reinforcements. The top plate desirably has means for securing a well nozzle to it.
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