Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – With means to discharge molten material
Patent
1994-07-11
1995-12-05
Kastler, Scott
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
With means to discharge molten material
222602, B22D 4120
Patent
active
054721784
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a device for controlling a plug of a metallurgical vessel, in particular a distributing launder of a continuous casting installation having a plug which can be raised and lowered and is supported in a support frame which is movable in respect to the metallurgical vessel and can be locked together with the metallurgical vessel.
2. Description of the Prior Art
A device of the above mentioned type is known from EP-A1-439 681, for example. In this known device the plug is connected to a cross arm disposed above the distributing launder or the metallurgical vessel for the controllable displacement of a plug. This cross arm is connected in turn with a support bar which can be moved up and down on a vertical guide, wherein the vertical guide of the support bar is embodied as a roller guide. The known device is fixed on the exterior of the distributing launder so that its mobility in relation to the metallurgical vessel or the distributing launder is only provided within the guide at the outer edge of the distributing launder or the metallurgical vessel.
Conventional devices are known from a number of further references, particularly EP-A2-435 540 as well as DE-A 2 021 211, wherein the plug mechanism for regulating the outflowing liquid metal is individually fastened to the distributing launder. The plug mechanism remains in the installed position when the tundish is changed.
This fixed and rigid connection between the plug mechanism and the distributing launder results in that as a rule the control or the plug rods are not dismantled, even when the brick lining of the distributing launder is renewed, since the fixed attachment at the distributing launder requires a too extensive and complicated dismantling process.
The plug rod which as a rule is equipped with a metal element on one end for fastening on a support bracket and with a conduit used for cooling, is knocked off after a predetermined number of launder drainings because, on the one hand, it is used up and, on the other, a removal without destroying it would entail a relatively large effort. Furthermore, pivoting mechanisms have been proposed in this connection which, however, also have not been accepted.
SUMMARY OF THE INVENTION
It is now the object of the invention to provide a device of the above mentioned type by means of which a separation of the plug mechanism from the metallurgical vessel or the distributing launder of a continuous casting installation is possible without a great operational outlay and which makes it possible to perform a tundish change, for example, without having to dismantle the entire plug mechanism. In connection with the brick lining work in particular, the aim of the device in accordance with the invention is to make possible such brick lining operations without impairment by the plug mechanism. To attain this object the embodiment in accordance with the invention is essentially characterized in that the support frame for the plug, which can be raised and lowered, is supported movable crosswise to the lifting direction of the plug outside of the metallurgical vessel. Because a separately displaceable support frame for the plug, which can be raised and lowered, is provided apart from the metallurgical vessel, particularly the distributing launder, it is made possible to separate the frame from the tundish and in this way to lift the distributing launder away without hindrance, for example by means of a hoist. The individual plug guides or the plug mechanism can be respectively kept in a displaced position which does not hamper the operation and is again available immediately at the end of the exchange operation with preadjusted distances for the individual plugs. This is of particular importance, especially with an embodiment with a plurality of plugs, because by means of this the maintenance effort and the amount of time necessary for an exchange of the distributing launder can be considerably reduced. Because now the support frame can be remo
REFERENCES:
patent: 2087563 (1937-07-01), Wallace
patent: 2753606 (1956-07-01), Fogt
patent: 4508247 (1985-04-01), Mills et al.
patent: 5118084 (1992-06-01), Paulus et al.
Auer Johann
Brandl Werner
Engleitner Walter
Grabner Gerhard
Hammerer Franz
Kastler Scott
Voest-Alpine Industriean-lagenbau GmbH
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