Abrégé

The invention relates to an immersion pipe (1) for strand casting molten metal, said immersion pipe being surrounded by a releasably secured, bell-shaped refractory casing (5). The bell-shaped casing (5) can be releasably secured to the surface of the lower part (2) of the immersion pipe (1) using different technical means in various ways, for example using a thread or a simple plug connection. The outer shape of the bell-shaped casing (5) is freely selectable, for example round, oval, or polygonal, and is based on the application type.

Classes IPC  ?

• B22D 41/50 - Buses de coulée

Abrégé

The invention relates to metallurgy, in particular to production of metal shot from a molten metal or alloy by casting. According to the claimed method for producing shot, melt fragments, as obtained by passing a melt through a die which passages consist of two successive sections, are cooled by a spilling flow of an air-droplet mixture and are placed into a cooling liquid. Another aspect of this invention is the device for producing shot from a molten metal or alloy for carrying out the claimed method. Yet another aspect of this invention is a device for cooling melt fragments of a molten metal or alloy, as produced by passing a melt through a die, which comprises one or more nozzles for supplying a sprayed cooling air-droplet mixture as a spilling flow to a space under the crucible. Still another aspect of this invention is a die for producing shot from a molten metal or alloy, which is arranged in the crucible bottom and which passages consist of two sections performing the functions of a dosing passage and an isothermal chamber. The technical effect of the claimed invention is production of shot with a high degree of sphericity and fractional composition.

Classes IPC  ?

• B22F 9/08 - Fabrication des poudres métalliques ou de leurs suspensionsAppareils ou dispositifs spécialement adaptés à cet effet par des procédés physiques à partir d'un matériau liquide par coulée, p. ex. à travers de petits orifices ou dans l'eau, par atomisation ou pulvérisation

Abrégé

The invention relates to ferrous metallurgy, in particular, to production of steel slabs by continuous casting. In the claimed method for continuous casting of steel, superheated metal is fed from an intermediate ladle to a mold having a rectangular cross-section by means of a submersible nozzle, which has a sprue channel in its upper part adjacent to the intermediate ladle; the sprue channel branches in the lower part of the nozzle to at least two closed- bottom outlet channels. The closed-bottom outlet channels are located within the nozzle limited by a skirt that stretches toward the narrow edges of the mold and joins with the nozzle above the level where the closed-bottom outlet channels branch, and by the lower edge of the skirt located below the level of the bottom of the closed-bottom outlet channels. Each closed-bottom outlet channel has two diametrically positioned and horizontally directed outlets, wherein the axes of the outlets form an angle that is not 90º with the wide edge of the mold in the horizontal plane. Another object of the invention is a submersible nozzle for implementation of said steel casting method. The claimed method for continuous casting of steel and submersible nozzle used therein result in an increased rate of casting, providing more uniform volumetric metal temperature and reduced wearing of the submersible nozzle, thus increasing the efficiency of slab continuous casting devices.

Classes IPC  ?

• B22D 41/50 - Buses de coulée

Abrégé

The present invention relates to an immersion tube (1) for use in metallurgy, at the lower end of which is arranged a nozzle having two outlet channels (5, 6) for liquid metal. A jacket (4) is arranged over the end of the immersion tube (1) and takes on a guiding function for the flow of the emerging liquid metal. The base (2) of the nozzle and the walls of the bell-like jacket (4) have at least one bore, through which a compressed medium, e.g. air, is able to escape.

Classes IPC  ?

• B22D 41/50 - Buses de coulée

Abrégé

The present invention presents a device (1) which considerably improves the technique of introducing gases into hot liquid media (3) in metallurgical processes for processing metals. The device (1) consists of a lower portion (14) and an upper portion (15), which are coaxially connected to each other at a connecting point, wherein the upper portion is formed by a relatively long gas introducing element (4), which consists of a material (MoSi2) that is largely chemically nonreactive to the gases used (N2, O2). As a result of the use of air enriched with O2 to > 40% O2, there is no need for the complex installation of annular gap cooling, and so the quantity of cooling gas that is necessary in principle in a ratio of 1:5 (CxHy to O2) is likewise rendered superfluous.

Classes IPC  ?

• F27D 3/16 - Introduction d'un jet de fluide ou d'un courant dans la charge
• C21C 5/34 - Soufflage à travers le bain
• C21C 5/46 - Parties constitutives ou accessoires
• C21C 5/48 - Fonds ou tuyères des convertisseurs
• B22D 1/00 - Traitement des métaux en fusion dans la poche ou dans les chenaux de coulée avant le moulage

Abrégé

The invention relates to the iron and steel industry, more specifically, to continuous slab casting using a submerged nozzle. The inventive submerged nozzle comprises a bottom, lateral channels and a skirt which is secured to the lower part of the nozzle above the output lateral channels and is formed by two parallel flat surfaces which are gradually conjugated on the ends thereof by means of cylindrical surfaces. The nozzle is arranged in the center of the skirt and has two similar oppositely positioned lateral channels having a common longitudinal axis which forms together with the parallel flat surfaces of the skirt an acute angle rangingfrom 20 to 45°.

Classes IPC  ?

• B22D 41/50 - Buses de coulée

Abrégé

The invention relates to steel production in the steel and iron industry. The inventive method consists in dividing a solid slag stream which flows from a metallurgical vessel and falls down, into individual streams along the solid stream, in forcedly cooling the thus obtained individual streams, in dividing the individual streams into parts (pieces) by cutting across the movement thereof, in forcedly cooling said parts and transferring to a belt conveyor, on which said separate parts/pieces are forcedly cooled and transported away from the vessel. A shaped (with containers) conveyor belt, on which the slag pieces are crushed by means of a cylindrical roll, is used for additional crushing. The inventive device for carrying out the totality of the above-listed operations, comprises at least three throat grates which are horizontally positioned in an assembled body and one of which is provided with a drive for carrying out reciprocating motion. The device also comprises a drive for displacing to/from the vessel. In the position closest to the vessel, the device is fed with air and water from a stationary plant for forcedly cooling the individual slam streams and the parts (pieces) of slam. The throat grate displacing drives and a conveyor belt drive are mounted on the device assembled body, and the roll and a drive for rotating it, when the shaped belt is used, are fastened thereto. The ribs of the throat grate are made from tensioned steel ropes.

Classes IPC  ?

• C04B 5/00 - Traitement des scories fonduesPierre artificielle à partir de scories fondues
• C21B 3/06 - Traitement du laitier liquide

Abrégé

The invention relates to producing and processing liquid metal in metallurgy. The inventive tuyer device comprises a well block with a built-in shell, coaxial metal pipes arranged inside the shell, a central working channel and an annular channel encompassing the working channel on the side of a device introducible into the liquid metal, wherein the channels are separately connected to ducts for supplying gas media to the metal and the coaxial metal pipes consist of two interconnected sections of different diameters, the second section having the larger diameter, being connected to the ducts for separately supplying gas media to the working channels of the first section, being provided with an extra pipe and having the annular channels only, the gaps of which are in the form of capillaries for the liquid metal, the internal section of the central pipe being closed on both ends and filled with a refractory material.

Classes IPC  ?

• C21C 5/35 - Soufflage par le dessus et à travers le bain
• C21C 5/48 - Fonds ou tuyères des convertisseurs
• C21C 5/52 - Fabrication de l'acier au four électrique
• C21C 7/072 - Traitement par des gaz