摘要:
A closure and/or regulation apparatus for controlling the outflow of melt from a metallurgical vessel includes a stator and a rotor rotatable relative to the stator. Additional responsive control of outflow is provided by a chamber that is part of or is connected to an outflow channel that can be connected to a vacuum generator.
摘要:
An immersion nozzle includes an immersion zone inserted into a long-thin mold cavity of a mold. A discharge channel extends through the nozzle for discharging molten metal into the mold cavity. The discharge channel includes an inlet region, an outlet region including a portion passing through the immersion zone, and a pool-forming chamber between the inlet region and the outlet region at a location adjacent the immersion zone. The portion of the outlet region of the discharge channel that extends through the immersion zone is widened and has a configuration to approximate the cross-sectional configuration of the mold cavity. The outlet region has, extending from the chamber in a direction of material flow, a configure approximately corresponding to the configuration of the portion of the outlet region through the immersion zone.
摘要:
The present invention is drawn to a regulating device of a metallurgical vessel for regulating the flow of molten metal from the vessel. The device includes a fixed refractory part defining a first cylindrical peripheral surface of the device and a movable refractory part that is rotatable and/or slidable relative to the fixed refractory part and defines a second cylindrical peripheral surface sealingly engaged with the first cylindrical peripheral surface. An actuating device is connected to the movable refractory part for rotating and/or sliding the movable refractory part relative to the fixed refractory part. The cylindrical peripheral surfaces of the refractory parts are spaced apart from one another so as to define an annular gap therebetween. In order to ensure that during operation the refractory parts can be moved relative to one another by the actuating device while preventing the penetration of molten metal into the annular gap, each of the refractory parts has a coefficient of thermal expansion which, when the device is subjected to a high temperature corresponding to the melting temperature of a molten metal, causes a clearance fit to be established between the peripheral surfaces that is effective to prevent molten metal having a melting point at the same predetermined high temperature from penetrating between the peripheral sealing surfaces while allowing the movable refractory part to be moved relative to the fixed refractory part.
摘要:
A regulating device for regulating the flow of molten metal from metallurgical vessel includes an inner tubular part which is fixed to the metallurgical vessel and defines at least one through-hole, and a movable outer tubular part rotatably and/or slidably mounted to the metallurgical vessel and extending around the tubular inner part. The tubular outer part terminates at a bottom edge constituted by a contiguous land extending around the tubular inner part. The tubular outer part can be slid and/or rotated between open and closed positions at which the through-hole of the tubular inner part is opened and closed, respectively. To prevent plugs of molten metal from hardening in the at least one through-hole of the tubular inner part, the bottom edge of the tubular outer part is designed so that a portion of the land thereof passes across the at least one through-hole when the tubular outer part is moved between the open and closed position. More specifically, at the closed position, a portion of the land constituting the bottom edge is located to one side of the through-hole with respect to the longitudinal axis of the tubular inner part while, at the open position a portion of the land constituting the bottom edge is located to the other side of the through-hole with respect to the longitudinal axis of the tubular inner part.
摘要:
A refractory guide member and a method for heating the refractory guide member by use of an inductor, where at least one collateral electromagnetic field located in a region spaced apart from the inductor is generated by the inductor. The mold part is made of an electrically conductive layer with several insulating interrupting slots for the controlled deflection of eddy currents from a main field generated by the inductor into a region spaced apart from the inductor.
摘要:
A rotary valve for controlling the discharge of molten metal from a metallurgical vessel includes a refractory rotor having a cylindrical outer peripheral surface and fitted within a recess defined by a cylindrical inner surface in a refractory stator and complementary to the outer surface. The rotor may be rotated about either a horizontal or a vertical axis relative to the stator and may be axially moved within the recess therein. The rotary valve may be mounted on the exterior of a bottom wall of a metallurgical vessel or alternatively may be mounted within a refractory lining of the metallurgical vessel, particularly in a transition area between a side wall and a bottom wall of the metallurigcal vessel. Further alternatively, the rotary valve may be mounted within the refractory lining of the bottom wall of the metallurgical vessel, with the rotor extending through the bottom wall and being actuated for movement from below the bottom wall.
摘要:
In a method of operating an inductor of a tapping device of a melt vessel, the inductor couples inductively during a working phase with an electrically conductive shaped component and is cooled by means of a fluid. The inductor is electrically decoupled and cooled by means of a fluid in another working phase.
摘要:
In a method of operating an inductor of a tapping device of a melt vessel, the inductor couples inductively during a working phase with an electrically conductive shaped component and is cooled by means of a fluid. The inductor is electrically decoupled and cooled by means of a fluid in another working phase.
摘要:
An annular space is formed between the opening of a refractory lining in a metallurgical vessel and a shaped element to be joined to the refractory lining in the opening. A joint packing is provided to be packed in the annular space. The joint packing is an annular, deformable, prefabricated packing adapted to the volume or the shape of the annular space. The joint packing is fixable in position in either the opening of the refractory lining or on the shaped piece when the joint arrangement is assembled. Preferably, the joint packing comprises a packing compound provided in a sleeve.
摘要:
A shut-off and control valve is used in regulating the discharge of molten metal from a metallurgical vessel into a continuous casting plant for continuous casting of a sheet, strip or slab having a relatively wide width dimension with respect to thickness dimension. The valve includes an elongated refractory stator having therein an elongated recess defined by a cylindrical inner surface. The stator has therethrough an elongated slot-like discharge channel, and the stator is mounted adjacent an elongated outlet opening of a metallurgical vessel. An elongated refractory rotor is rotated about a longitudinal axis and has a cylindrical peripheral outer surface arranged symmetrically about such axis and complementary to the inner surface of the stator. The rotor has therethrough an elongated slot-like flow channel. The rotor is fitted within the recess in the stator with the outer and inner surfaces of the rotor and stator, respectively, symmetrically positioned about the axis and in sealing contact with each other. Rotation of the rotor about the axis relative to the stator and/or axial movement of the rotor within the recess relative to the stator selectively bring the flow channel of the rotor relatively into and out of alignment with the discharge channel of the stator.