| 摘要 |
An injection valve which is positioned on the underneath portion of a teeming vessel is disclosed. It may be positioned under a ladle, or under a tundish. The valve itself includes a mounting plate, and a well block nozzle which is in open communication with the metal being teemed in the vessel. Beneath the well block nozzle is a stationary plate, therebeneath a sliding plate which may be imperforate, perforate, or have an opening containing a porous plug or ceramic sieve depending upon the type of injection. Beneath the sliding injection plate a sliding plate carrier is positioned which is engaged by spring loaded rocker arms in order to maintain a compressive relationship between the sliding plate carrier, the sliding injection plate, and the stationary plate. Centrally of the sliding plate carrier is a coupler which, in turn, is connected to a further coupler, an injection hose, and an injection supply for delivering additives to the vessel through the injection valve. Optionally the injection valve is fed by a plurality of injectants supplied which are adjusted by means of control valves. In addition, wire may also be injected simultaneously with gas, or other additives. In addition, power means are provided for replacing the sliding plate carrier, and also the sliding plate. The method of operation includes preparing the injection valve after a pour has been completed by lancing the same in a partially disassembled form, utilizing a plug, and thereafter assembling and operating the same.
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