专利名称：Improvements in the introduction of
substances into molten metal
发明人：Shaw, Richard Dudley,Davis, Richard Peter
Bernard
申请号：EP83300745.3申请日：19830215公开号：EP0087261A1公开日：19830831
专利附图：
摘要：A valve assembly for insertion into the bottom of a ladle for molten metal 2comprises refractory upper and lower parts 8 and 9 defining a flow passage 10,13 with an
enlarged central region containing a valve head 17,18, 19. The valve head is moved by aspindle 21 to control the flow of gas injected through the valve into the metal.
申请人：ZIRCONAL PROCESSES LIMITED
地址：Cosmos House Bromley Common Bromley Kent BR2 9TL GB
国籍：GB
代理机构：Daley, Michael John
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