公开(公告)号：US20030116893A1

公开(公告)日：2003-06-26

申请号：US10029897

申请日：2001-12-21

Applicant: Bethlehem Steel Corporation

Inventor： Bruce R. Forman

IPC: C21C005/48 ,  C21C007/072

CPC classification number: C21C5/4653 ,  B22D41/42

Abstract: The invention is directed to a dynamic control system that maintains an inert gas feed at a constant target gas flow rate sufficient to prevent or reduce alumina or alloy plugging within a slide gate discharge opening. The dynamic control system includes a gas feed line extending between an inert gas supply and the slide gate discharge passageway, a gas flow regulator, a pressure gauge; and a gas feed flow control that detects an amount of incoming inert gas lost through leaks in the system and adjusts the gas flow regulator in response to the detected amount of incoming gas flow loss so that the adjusted incoming gas feed continues to deliver the target inert gas flow rate to the discharge passageway.