公开(公告)号：EP1042088A4

公开(公告)日：2003-08-06

申请号：EP98966018

申请日：1998-12-16

申请人： LOCKHED MARTIN ADVANCED ENVIRO

发明人： HAUN ROBERT E ,  LAMPSON ROBIN A

IPC分类号： H05B7/20 ,  B22D1/00 ,  B22D27/02 ,  B22D45/00 ,  F27B3/08 ,  F27B3/19 ,  F27D3/14 ,  F27D3/15 ,  F27D11/08 ,  F27D99/00 ,  C21C7/10 ,  F27B14/06

CPC分类号： F27D99/0006 ,  B22D21/02 ,  B22D27/15 ,  F27B3/085 ,  F27B3/19 ,  F27D3/1509 ,  F27D11/08 ,  F27D2099/0031

摘要： Specialty metals and alloys are melted in a crucible (10) typically holding no more than about 100 lbs. of metal and disposed in a furnace (2) filled with an inert gas and subjected to a vacuum in the range of about 5 % to 32 % of atmospheric pressure. The vacuum permits in the initiation and formation of long electric discharge arcs between the electrode (48) and the inside of the crucible (10) to provide enough space for charging of the crucible (10) with fresh metal. A skull (96) forming along the inside surfaces of the crucible (10) is lifted off the crucible surfaces (26) after each pour with a closure plate (32) that is pushed from below into the drain hole (30). The skull (96) is then melted with the plasma torch (44) so that resulting melted metal collecting in the drain forms a drain plug (94) upon solidification.

公开(公告)号：EP0919111A4

公开(公告)日：2000-04-19

申请号：EP97927730

申请日：1997-05-13

申请人： LOCKHED MARTIN ADVANCED ENVIRO

发明人： SCHLIENGER MAX P

IPC分类号： H05B7/18 ,  B22D43/00 ,  C22B4/00 ,  C22B9/02 ,  F27D3/15 ,  F27D9/00 ,  F27D11/08 ,  F27D15/00 ,  H05B7/00 ,  C22B7/04 ,  F27D3/00 ,  H05B7/02

CPC分类号： B22D43/008 ,  C22B4/005 ,  C22B9/02 ,  F27D3/1572 ,  F27D9/00 ,  Y02P10/234

摘要： Slag from a pool of molten slag (34) floating on molten metal in a plasma arc treatment chamber (36) is removed by providing a slag container (38) located inside the chamber which has a slag intake pipe (40) extending from a bottom of the container (38) downwardly into the slag pool. A vacuum line (48) is connected to the top of the container and a vacuum source (46). When a vacuum is applied to the inside of the container, the pressure prevailing in the chamber pushes the slag from the pool through the intake pipe into the container. When the container becomes filled with molten slag, the latter enters a section (44) of the line communicating the top of the container with the vacuum source. As the slag enters the pipe section, it is cooled and solidified to prevent further slag flow into or gas/air flow through the vacuum line so that the container can be lifted out of the chamber while the slag in the container is still in its molten state without causing slag spillage.

摘要翻译： 从熔渣浮在等离子体弧处理室的熔融金属池熔渣是通过提供位于其中有一个炉渣吸气管从容器的底部延伸向下进入渣池的腔室内部的渣容器中移除。 将真空管连接于容器的顶部和一个真空源。 当真空施加到容器的内部，该压力在腔室盛行推动通过所述进气管中的池到容器的炉渣。 当容器变得充满熔融炉渣，后者进入通信与真空源的容器的顶部的线的一部分。 由于炉渣进入管段，它被冷却并固化，以防止进一步的熔渣流入或气体（空气）流过真空管线也是如此，而在容器中的熔渣中被停止的容器能够被提升离开所述腔室的其 熔融状态而不引起炉渣溢出。