A refractory sliding gate valve plate has a planar upper surface and a planar lower surface parallel to the planar upper surface. A connecting outer surface connects the upper surface to the lower surface, and a pouring channel fluidly connects the upper surface to the lower surface. Specified ratios of length between (a) specified longitudinal segments extending from the axis of symmetry of the pouring channel to the perimeter on the upper surface and the lower surface of the plate, respectively, and also between (b) specified latitudinal segments extending from the axis of symmetry of the pouring channel to the perimeter on the upper surface and the lower surface of the plate, respectively, increase the uniformity of thrust force applied to the plates and the contact area between the upper surfaces of two such plates within a valve.

A refractory sliding gate valve plate has a planar upper surface and a planar lower surface parallel to the planar upper surface. A connecting outer surface connects the upper surface to the lower surface, and a pouring channel fluidly connects the upper surface to the lower surface. Specified ratios of length between (a) specified longitudinal segments extending from the axis of symmetry of the pouring channel to the perimeter on the upper surface and the lower surface of the plate, respectively, and also between (b) specified latitudinal segments extending from the axis of symmetry of the pouring channel to the perimeter on the upper surface and the lower surface of the plate, respectively, increase the uniformity of thrust force applied to the plates and the contact area between the upper surfaces of two such plates within a valve.

In a sliding gate, a flow path vertical angle a between a flow path axial direction and a vertical downstream direction in a flow path hole in each plate is 5° or more and 75° or less, and a flow path axial direction projected on sliding surface in which the flow path axial direction is projected on a sliding surface differs between the plates and is changed clockwise or counterclockwise toward a downstream side. Then, molten metal forms a turning flow in the flow path hole of the sliding gate. Furthermore, the molten metal also forms a turning flow in a ladle shroud on the downstream side of the sliding gate.

A sliding nozzle device that can reduce any damage such as surface roughness and chipping in a nozzle hole surroundings of a used plate. The sliding nozzle device includes a fixed metal frame, a sliding metal frame, and an opening and closing metal frame that holds the sliding metal frame in a slidable manner, and in the sliding nozzle device in which sliding contact surfaces of the sliding members provided on the sliding metal frame and the opening and closing metal frame come in slidable contact with each other, the sliding contact surfaces of the sliding member of the sliding metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part, and the sliding contact surfaces of the sliding member of the opening and closing metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part.

A sliding nozzle device that can reduce any damage such as surface roughness and chipping in a nozzle hole surroundings of a used plate. The sliding nozzle device includes a fixed metal frame, a sliding metal frame, and an opening and closing metal frame that holds the sliding metal frame in a slidable manner, and in the sliding nozzle device in which sliding contact surfaces of the sliding members provided on the sliding metal frame and the opening and closing metal frame come in slidable contact with each other, the sliding contact surfaces of the sliding member of the sliding metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part, and the sliding contact surfaces of the sliding member of the opening and closing metal frame are provided away from each other by a predetermined length front and rear in the sliding direction and a part between the front and rear sliding contact surfaces serves as a depressed part.

Sliding gate for a vessel containing molten metal includes a slide housing, a slide unit guided longitudinally in the slide housing and having a push rod, a mounting and a linear drive removably fastened in the latter and has a drive rod. This drive rod can be connected to the push rod by a coupling. The coupling is designed such that, when the linear drive has been pushed into the mounting, it automatically couples by movement of the drive rod towards the slide unit, while it uncouples when the linear drive is removed from the mounting transversely in relation to the direction of movement of the drive rod. A locking device is actuated by the linear drive and interacts with the mounting, by means of which the linear drive after being pushed into the mounting is fixed in the latter and can be unlocked again before it is removed.

A sliding member includes a base material and an alloy layer that includes Cu as a main component and Bi and having a sliding surface formed on a side opposite to the base material. The alloy layer has a first region and a second region. The first region is set to a region taking up 30% of the thickness of the alloy layer which is from an interface in contact with the base material toward the sliding surface. The second region is set to a region taking up 10% of the thickness of the alloy layer which is from the sliding surface toward the base material. A larger number of Bi phases having larger cross-sectional areas are distributed in an arbitrary observation cross section as Bi phases included in the second region compared to Bi phases included in the first region.

A sliding nozzle apparatus, configured to allow a drive unit to be attached to and detached from a slide metal frame, efficiently transmits a driving force of the drive unit to the slide metal frame. The sliding nozzle apparatus comprises a connection component attached to a slide metal frame and configured for connection with a drive unit. The connection component is provided with an opening with respect to which the drive unit can be attached and detached. The connection component is configured to allow the opening to be switched between a first position where the opening faces in the same direction as an opening-closing direction of the slide metal frame, and a second position where the opening faces in the same direction as an attaching-detaching direction of the drive unit.

With a method for detecting variables in an outlet of a metallurgical vessel, different variables in the outlet are detected or measured by at least one coil surrounding the outlet channel and/or an induction coil of an induction heater as a monitoring system, wherein the variables relate to the slag portion when pouring out the metal melt, wear condition of refractory parts in the outlet channel, the solidified metal melt, flow rate and/or plugging mass in the outlet channel. After evaluation, a closure element for the outlet is actuated, heating of the metal in the outlet channel is activated and/or renewal of the outlet channel is triggered. In this way, optimum operation in the pouring of metal melt out of a vessel is simply achieved, wherein occurrence of irregularities are detected during the entire pouring, and pouring out of slag can be successfully prevented at the end of the pouring.

In a sliding gate, a flow path vertical angle a between a flow path axial direction and a vertical downstream direction in a flow path hole in each plate is 5 or more and 75 or less, and a flow path axial direction projected on sliding surface in which the flow path axial direction is projected on a sliding surface differs between the plates and is changed clockwise or counterclockwise toward a downstream side. Then, molten metal forms a turning flow in the flow path hole of the sliding gate. Furthermore, the molten metal also forms a turning flow in a ladle shroud on the downstream side of the sliding gate.