buffer rod system for use in a metallurgical pan and buffer rod and nozzle for use in a buffer rod system

摘要

"STEM CAP BUFFER FOR USE IN A METALLIC COOKER AND STEM CAP AND TUBE FOR USE IN A CAPE STEM SYSTEM". The present invention is a buffer rod system for use in a metallurgical pan comprising a buffer rod and a nozzle. At least one of the nose of the plug stem and the inner surface of the nozzle bore comprises a plurality of undulations which are so distributed that the size of a flow channel between the nose of the plug stem and the internal plug stem when the system The shank rod is in an open position and discontinuously increases in size as the distance downstream of the contact point between the shank and nozzle.