Vesuvius Crucible Company

Vesuvius USA Corporation

Ltv Steel Company, Inc.

Jose Antonio Simoes

Dominique Janssen

Roger L Maddalena

Philippe Guillo

Beda Mohanty

Francois-No&euml;l Richard

Sunilkumar C Pillai

Babu Patel

Robert O Russell

Roger Maddalena

A lining structure for a refractory vessel contains a first layer containing refractory material; a second layer, in communication with and parallel to the first layer, containing a metal layer or component; and a third layer, in communication with and parallel to the second layer, containing refractory material. The metal component in the second layer contains filled transverse passages, between the surface of the second layer in contact with the first layer and the surface of the second layer in contact with the third layer, producing support structures to maintain the structural integrity of the refractory vessel in use.

Metallurgical vessel lining with enclosed metal layer

A lining for a metallurgical vessel is configured to have an engineered porosity. The lining contains a plurality of regions, each extending in a primary plane of the lining, each region having a differing value of total pore or perforation area as measured in a primary plane of the lining. The lining may be used to form part or all of the working surface of the floors or walls of the vessel. In casting use the lining produces an oxidation buffering layer at an interphase of metal melt extending from the interface between metal melt and the walls and floor of the metallurgical vessel, such that when in casting use, the metal flow rate in said oxidation buffering layer is substantially nil, and the concentration of endogenous inclusions, in particular oxides, in said oxidation buffering layer is substantially higher than in the bulk of the metal melt.

Metallurgical vessel lining with configured perforation structure

A tundish assembly, including an element, for preventing or limiting steel reoxidization in the continuous casting of molten steel, is used in combination with a refractory nozzle. The element has an orifice engaging the outer surface of the nozzle, a main surface surrounding the main orifice and having a lowest level lower than the top outer edge of the nozzle inlet portion, and a periphery having an upper face surrounding the main surface of the element. The upper face of the periphery of the element is higher than the main surface of the element and is higher than the surface of the bottom well of the tundish. The main surface of the element is arranged so as to contact molten steel in a tundish.

Assembly of a nozzle and surrounding element

The invention relates to a plant for transferring liquid metal, in particular steel, between an upstream container (,) and a downstream container (,), comprising: an upstream container (,); a tapping spout (,); a downstream container (,), a flow regulator (,) for regulating the flow of liquid metal through the tapping spout (,); a set of refractory assemblies (,) which are placed between the upstream container and the downstream container, delimiting the tapping spout (,) via which the liquid metal flows from the upstream container (,) into the downstream container (,), each refractory assembly of the tapping spout (,) having at least one mating surface (,) forming a joint with a corresponding surface of an adjacent refractory assembly; a shroud channel (,) placed around the tapping spout (,) near at least one mating surface (,) between refractory assemblies (,), this shroud channel having an inlet (,) capable of allowing the introduction of materials; in which plant means (,) are provided for introducing a sealing agent into the shroud channel (,).

Plant for transferring liquid metal, method of operation, and refractories

A refractory nozzle assembly is provided that effectively prevents the accumulation of alumina deposits around its upper edge where it receives a stopper rod. The nozzle assembly includes a refractory nozzle body having an upper and a lower portion. A bore extends through both the upper and lower portions that has a receiving and a discharge end for receiving and discharging molten metal. An inert gas distributor circumscribes the upper portion of the nozzle body. A sleeve of gas-obstructing refractory material covers the walls of the bore, and defines a seat portion at an upper portion of the bore. A metal sheath substantially surrounds the outer surface of the upper portion. Pressurized inert gas conducted to the upper, gas permeable portion of the nozzle body by the gas-distributing assembly is guided by the gas-obstructing sleeve and the metal sheath so that it flows predominantly through the top edge of the upper portion. The resulting inert gas flow shields the seat portion of the bore from ambient oxygen, thereby preventing the accumulation of alumina deposits on the seat portion that can interfere with the ability of the stopper rod to control the flow of molten metal.

Growing community of inventors

Saint Ghislain, Belgium

Jose Antonio Simoes