Submerged branch pipe for vacuumiser |
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IPC classes for russian patent Submerged branch pipe for vacuumiser (RU 2557046):
 
 System of refrigerator plate and method of installing refrigerator plates in metallurgical furnace / 2501864
Proposed system comprises first refrigerator plate and adjacent second plate. Every said refrigerator plate has face side facing the furnace inner chamber, opposite rear side facing the furnace wall and four end sides. Insert to fill the clearance is arranged between two adjacent refrigerator plates. Said insert comprises front metal plate with front side facing the furnace inner chamber and lock to install front plate between two adjacent refrigerator plate so that front plate extending between end sides of both refrigerator plates while front side of front plate is installed flush with face sides of both refrigerator plates.
 Vacuum chamber / 2499840
Vacuum chamber includes three submersible connection pipes. Connection pipes have an inclination relative to vertical axis of the vacuum chamber and are located with an offset relative to the same axis to the distance of 1-1.5d, where - inner diameter of the connection pipe. Each connection pipe is equipped with an insert lined with refractory material, which is located between the vacuum chamber bottom and upper surface of the connection pipe and carrier gas supply nozzles located on lower side opposite to the insert.
 Steel making method / 2499839
Method involves steel making in a steel-making unit, pouring of molten metal into a ladle, examination of molten metal chemical composition, alloying, deoxidation, vacuumising and casting. Alloying and deoxidation of molten metal is performed additionally with rare-earth metals and/or their alloy combinations. Nitrogen alloying is performed before deoxidation is completed by introduction to the ladle of solid nitrogen-containing materials and/or by gaseous nitrogen blowdown, and total amount of deoxidising agents, which is introduced to the molten metal to achieve the specified content of oxygen in steel, is determined as per the following formula: ΣR=1.2÷3.0(ao-[%O"ГОТ"], where ΣR - total content of deoxidising agents, wt %, ao - oxygen activity in molten metal, wt %, and [%O"ГОТ"] - specified oxygen content in steel, wt %.
 Steel making method / 2499838
Method involves melting in an arc furnace of a semi-finished product, pouring of molten metal into a ladle, feeding of solid slag mixture and alloying additives, treatment of molten metal with the main slag, balancing argon blowdown, control of molten metal oxidation, aluminum deoxidation, vacuum slag treatment and vacuum casting; with that, pouring of molten metal into the ladle is performed without slag cutoff, and treatment of molten metal in the ladle is performed using slag with basicity of (CaO+Al2O3)SiO2, which is equal to 4, 5…16. With that, vacuum slag treatment is performed for two times provided that the first vacuum slag treatment is started at oxygen activity in molten metal of 0.01…0.05 wt % and total content in the slag of iron and manganese oxides in the range of 15…25 wt %, and the second vacuum slag treatment is performed at oxygen activity in the molten metal of not more than 0.01 wt % and total content in the slag of iron and manganese oxides of not more than 5 wt %, and addition of slag forming and alloying components is performed prior to the second vacuum slag treatment.
Low-carbon steel making method / 2495139
Method for steel pouring to a steel-pouring ladle involves pre-deoxidation and alloying with manganese-containing ferroalloys, out-of-furnace metal treatment is performed at a circulation steel vacuumising plant; at that, negative pressure is set in a vacuum chamber for not more than 10 mbar and argon consumption for mixing is 0.8 to 1.1 l/(t*min). After that, final deoxidation and metal alloying in the vacuum chamber is performed with aluminium shot in the quantity of 1.5…2.5 kg/t in terms of obtaining the required content of aluminium in metal. At that, total duration of vacuumising is set from 10 to 15 minutes.
 Device for degassing steel melt furnished with perfected exhaust sleeve / 2473704
Device comprises teeming ladle 3, vessel 2 arranged there above, inlet sleeve 4 with device 5 fitted therein for gas blowing, and discharge sleeve 1. Exhaust sleeve 1 is arranged nearby edge 9, in radial direction relative to central lengthwise axis 6 of exhaust sleeve, with at least one opening 7.
 Repair method of vacuumiser branch pipe lining / 2469101
Method involves application of refractory mass to the product to be repaired, lowering of hot vacuumiser with branch pipe on it; for that purpose, repairable product is manufactured by means of casting the concrete into the mould; the above product has inner cylindrical hole equal to diameter of hole of branch pipe in original form, and outer diameter is less by 5-25 mm than diameter of used lining of branch pipe.
 Supply sleeve for degassing reservoir for metallurgical melts operating using rh method / 2468092
Invention refers to the field of metallurgy, and namely to circulation vacuumising of liquid steel. The supply sleeve of the degassing reservoir comprises areas of supply with tubular blowers for introduction of inert gas, distributed along the axial length of the sleeve. Between areas of inert gas supply there are separate sections provided with conducting elements arranged in the form of grooves. Conducting elements stretch upwards in direction of the longitudinal axis of the sleeve and are twisted in its respect by the angle equal to 20° - 45°.
 Multipurpose tuyere for metallurgical vacuumiser / 2448166
Multipurpose tuyere includes housing made of steel tubes connected to copper head and forming inflammable gas, oxygen supply paths, cooling water supply and discharge paths and igniting burner equipped with electric power supply. Igniting burner is installed in inflammable gas supply path and made in the form of metal tube the upper end of which is connected to compressed air supply path and lower end of tube is connected to tubular adapter made from heat-resistant electrically conducting material. Inner cavity of tubular adapter in zone of its connection to metal tube is interconnected with inflammable gas supply path by means of throttle channel. Metal tube of igniting burner is isolated from housing of tuyere by means of electrical isolator and connected to one of the power supply terminals. The second terminal is connected to lower end of tubular adapter.
Method of metal degassing in ladle / 2446216
Method involves installation above the ladle of vacuum chamber with two branch pipes, submersion of two branch pipes of vacuum chamber under the metal level in the ladle, creation in vacuum chamber of residual pressure and supply via the pipeline to vacuum chamber branch pipe of inert gas under pressure. Prior to vacuum treatment there performed is deoxidation of metal and slag in the ladle till the content of free dissolved oxygen in the metal is not more than 3 ppm. Then, high-basic covering slag is introduced and metal desulphurisation is performed till sulphur content is not more than 20 ppm. Then, metal vacuum treatment is performed during 20…22 min at negative pressure of not more than 2.0 mbar with argon consumption in branch pipe of vacuum chamber of 4.2…5.6 l/(min*t).
Melt metal vacuum treatment method / 2257417
Method comprises steps of supplying melt metal into metallurgical ladle for filling it till safety height in range 0.4 - 0.6 m; treating metal due to creating over ladle partial vacuum atmosphere at simultaneous agitation of melt metal by feeding helium from bottom of ladle during part of treatment period or the whole period of treatment; realizing treatment such as dehydrogenation and denitration of steel at supplying helium flow 1.875 standard l/min per ton of melt metal or more. Invention provided s possibility for treating in lade larger quantity of metal, particularly steels needing final content of carbon less than 60 pro mille. It is also may be used in any vacuum metallurgical process needing agitation when it is necessary to provide safety height.
Method of making steel for metal cord / 2265064
Proposed method includes melting of iron-carbon melt containing at least 0.20 mass-% of carbon in steel-melting unit, tapping non-deoxidized metal into teeming ladle with main lining and porous plug for blowing with argon, preliminary deoxidation of melt by carbon-containing materials and ferroalloys at tapping into teeming ladle, addition of slag-forming mass into ladle, vacuum carbon deoxidation in ladle to steel quality level, final correction of steel by chemical composition and temperature at "furnace-ladle" set and continuous teeming. Preliminary deoxidation of melt is performed by means of carbon-containing material at content of carbon no less than 99% and ferromanganese at content of manganese above 70% and that of silicon below 6%; after vacuum carbon deoxidation, silicon-containing ferroalloys are added.
Method of the stream-vacuum refining of the steel / 2294383
The invention is pertaining to the field of metallurgy, in particular, to the processes of the out-of-furnace treatment of the steel of steel. Before the stream vacuumization the steel is subjected to the preliminary deoxidation by introduction into the melt of the reducing agents, such as aluminum, titanium, calcium, magnesium and-or their alloys, in the amount defined by the share of carbon in this melt. The invention allows to improve the uniformity and stability of the production process and to reduce the value of total residual oxygen in the steel after the treatment by fixing the greater part of the oxygen in the oxide non-metallic inclusions before the vacuum treatment.
Method of refractory lining of heat plants / 2319914
Method comprises supplying concrete mass within the oxygen-containing jet to the preliminary heated surface of the lining up to formation of a monolithic layer.
 Evacuating apparatus / 2323263
Evacuating apparatus includes mounted on platform vacuum-chamber with submersible branch pipe and with hood; gas cooler connected with hood through vertical vacuum-tight butt and having horseshoe-shape. Gas cooler embraces hood with gap. At side opposite relative to butt with hood, gas cooler freely rests upon zone arranged on platform.
 Method of steel vacuum refining process in ladle, mechanism (variants) and junction pipe for its implementation / 2324744
Invention relates to an area of metallurgy; in particular, to the method and equipment necessary for the out-of-furnace processing of liquefied metals. The application includes introduction of the mixed gas during all refining process into a ladle filled with the liquefied steel which, in turn, is placed inside a vacuum chamber. At the second refining stage the rarefaction is increased with similar intensity to provide the same rarefaction at any given time moment all over the steel surface in the ladle. At the second stage also, during the beginning of an intensive burning of steel, its boiling surface becomes divided into the central and peripheral areas. The larger rarefaction degree is induced over the central area, as opposed to that over the peripheral one. Thereafter the rarefaction degree goes on to increase over the indicated areas, thus securing the given differences between them. At the third state the aforementioned areas are united, while the rarefaction degree over an entire steel surface continues to increase until it reaches the target level. The method can be fulfilled by means of installation for the vacuum refining of steel in the ladle and the junction pipe produced in such a manner that it may be drowned deep down the liquefied steel. Use of this invention permits to reduce the length of the vacuum refining process.
Method of steel ladle metallurgy / 2325448
Said utility invention relates to the ferrous metallurgy, namely, to ladle treatment of steel. The method involves feeding steel into the ladle, its circulation degassing by continuous passing through a vacuum vessel with suction and drain nozzles, feeding the carrier gas to the suction nozzle. Before degassing, vacuum vessel is filled with nitrogen under pressure. During immersion of the nozzles to the steel, nitrogen feeding is stopped and underpressure is created in the vacuum vessel. The use of the invention increases degassing capacity and decreases operation costs.
 Circulating vacuumising device with screen for suppression of metal drops / 2331673
Invention refers to iron and steel metallurgy, particularly to assemblies for out-of-furnace treatment of liquid steel. The circulating vacuumising device contains a vacuum chamber, wherein in its lower portion sucked in and exhaust branches are installed, a blowthrough tuyere for gas and/or reagents supply, a branch for ferroalloys supply, a branch for input of the blowthrough tuyere into the vacuum-chamber, a branch for exhaust gases, and a gas pipe; the area of the exhaust branch is lower than the area of the sucked-in branch. A screen for metal drops suppression is water-cooled and lined below with a fire resistant material; the said screen is installed in the vacuum chamber on a fire-resistant projection at a distance of 300-1500 mm from the metal surface and has two apertures: one is for input of the blowthrough tuyere located over the screen for suppression of metal drops, while the other is for gases exhaust through the gas pipe, connected via a side branch to the vacuum-chamber. The invention allows reducing the height of a metallurgical assembly, it also reduces specific consumption of refractory materials as well as the cycle of out-of-furnace steel treatment.
 Method of vacuum refinement of liquid steel in ladle / 2348699
Invention concerns ferrous metallurgy. Particularly it concerns processing of liquid steel in ladle. Method includes regulation of pressure above the surface of liquid steel and consumption of argon depending on argon content in pumped out gas, changing of carbon monoxide release rate and value of buildup of fluid steel (slag-metal emulsion) in ladle.
Method of liquid steel processing in vacuum chamber / 2348700
Invention concerns ferrous metallurgy and can be used at cycling and circulating degassing of steel during the process of out of furnace processing. In this method vacuum chamber is warmed before degassing, it is implemented cycling and circulating degassing, steel is heated and alloying materials are introduced. Steel heating is implemented by one or several lasers during the process of degassing and after alloying materials introduction.
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FIELD: metallurgy. SUBSTANCE: invention relates to metallurgical equipment and can be used at the metallurgical enterprises during tapped-metal degassing. The submerged branch pipe contains metal structure lined by refractory rings and refractory concrete. The bottom refinery ring is made with l-shape, and branch pipe is equipped with support metal ring secured under the specified bottom refractory ring, and between internal surface of the metal structure and external surface of the refractory rings including the specified bottom refinery ring a buffer layer compensating the thermal expansion is located. EFFECT: invention ensures significant rise of the refractory resistance of the entire structure, and increases durability of the designed submerged branch pipe. 12 cl, 3 dwg
Patented nozzle submersible relates to metallurgical equipment, has a high resistance of the refractory lining and can be effectively used at metallurgical enterprises in the structure of the vacuum degasser. The prior art discloses various designs of the immersion nozzle to the vacuum degasser. Thus, the known design of the immersion nozzle of a vacuum degasser (lining project of vacuum degasser No. 1 HTMK-538-RH). A disadvantage of the above construction is that during operation the vacuum chamber is intensively eroded the junction of the refractory ring and refractory concrete. Molten steel penetrates into the place of destruction and erodes the refractory support ring off a shelf. It leads to subsidence and education between the refractory rings clearance. When lowering the pipe into the molten metal flows into the gap, causing local destruction of the circumference. The vacuum chamber due to wear of the nozzle is withdrawn for repairs prematurely. Also known construction of the immersion nozzle for the vacuum degasser with a sloping shelf (lining project of vacuum degasser No. 2 HTMK-535-RH). The disadvantage of this design is that the inclined holding refractory ring shelf, not enough hard it locks. In operation, vacuum chamber, the absence of rigid fixation leads to sagging of refractory rings obrazovanie local Asgarov. The prior art discloses the design of the immersion nozzle for the vacuum degasser (patent RF №96574 for utility model; SS 7/10) closest in technical essence and constructive implementation to patent the invention and selected as a prototype. The submersible pipe for the vacuum degasser (patent RF №96574), consists of a metal structure, lined with refractory rings. Bottom refractory ring has an l-shaped sectional profile, and metal structure fitted with locking stops. Significant design and operational deficiencies of this design of the immersion nozzle are: - the absence of a buffer layer on bottom of lining ring leads to the destruction of this constructive node in the result of the expansion of the lower ring during operation; - reduced design and operational reliability of the immersion nozzle, due to the fact that in the case of cleavage of the bearing part of the lower l-shaped refractory ring under the weight of the parent rings the entire lining of the socket is destroyed. - the complexity of the metal, which increases the cost of the immersion nozzle. The claimed invention solves the technical problem of the development of the submersible pipe for the vacuum degasser having increased fire resistance, increased Dolgova�racy and reliability, as well as an increased resource of uninterrupted work. The solution of the technical problem is achieved as follows. The submersible pipe for the vacuum degasser, a similar design shown in the patent of Russian Federation №96574 consisting of a metal structure, lined with refractory rings and lined with refractory concrete, according to a patentable invention, the nozzle comprises a base metal ring that is fixed under the bottom refractory ring is d-shaped in cross section and between the inner surface of the metal structure and the outer surface of the refractory lining rings placed buffer layer. The invention provides that the buffer layer is made of a padded buffer mass, or refractory concrete, and the thickness of the buffer layer is from 10 to 100 mm. According to the invention, the thickness of the supporting metal ring is from 10 to 200 mm and the difference between the outer and inner diameters of from 30 to 200 mm. Provided that the bottom refractory ring is made g-shaped form, with the following ratio of: L - the difference between the outer and inner diameters of the support ring. L1 is the value of the reference part of the g-ring is equal to (0,1-0,8)L. H - the height of the ring. H1 - the height of the supporting part of the g-ring is equal to (0,1-0,8)N. The Pat�theme the invention provides the ability to perform the portion of the bottom refractory ring, which is in contact with base metal ring with different geometry of the outer side surface, for example, with arcuate lateral surface, with an inclined lateral surface. Provides the ability to perform the portion of the bottom refractory ring which is in contact with a support ring, in the form of a rectangular groove (crest). The technical result from implementation of the claimed invention is a significant increase refractory durability of the whole structure, increased durability and maintainability of the developed submersible pipe. The presence of the buffer layer to compensate for thermal expansion and prevents from cracking the bottom refractory lining ring is d-shaped in cross section when heated, which can significantly increase the operational reliability and thermal resistance of the immersion nozzle. It is established that the patented design has a low level of thermal stress that causes and ensures high reliability and durability-designed submersible pipe. The essence of the claimed invention is illustrated by description of the developed submersible pipe for the vacuum degasser and drawings, in which are shown: Fig.1 is a layout block diagram of a patent�already listed the immersion nozzle; Fig.2 - ring of refractory lower g-shaped (slit); Fig.3 - design implementation options bottom refractory ring 3 and the supporting metal ring 4. Patented nozzle submersible (Fig.1) contains the metal structure 1, the refractory lining of ring 2 mounted in the cavity of the metal structure 1. The pipe contains a lower l-shaped in cross-section of the refractory ring 3 (Fig.2, 3), ensuring the reliability of the pipe lining. At the bottom of the pipe mounted support metal ring 4, which allows a reliable fixation of the refractory ring 2 and 3 of the socket. The mounting support metal ring 4 in the lower part of the immersion nozzle is carried out, for example, put eat its welding with metal frame 1. Bottom refractory ring 3 may have a different end implementation (Fig.3), the choice of which is determined by a set of design parameters such as the thickness of the buffer layer 6, the diameter and the thickness of the supporting metal ring 4, the operating conditions of the immersion nozzle. Preferably, the implementation of bottom refractory ring 3 d-shape (Fig.1, 2). Fig.3 shows various embodiments of the portion of the bottom refractory ring which is in contact with the supporting metal ring 4, with different geometry Nar�South-side surface, for example, with arcuate lateral surface (Fig.3F), with an inclined lateral surface (Fig.3D, e). Possible to perform the portion of the bottom refractory ring which is in contact with the supporting metal ring 4, in the form of a rectangular groove (Fig.3i). The outer surface of the metal structure 1 is protected by a layer of refractory concrete 5, and between the inner surface of the metal structure 1 and a refractory lining 2 rings placed buffer layer 6. A buffer layer 6 made of wadding of buffer mass, or refractory concrete. The thickness of the buffer layer 6 is from 10 to 100 mm. The buffer layer 6 between the refractory lining rings 2 and 3 and the metal structure 1, to compensate for thermal expansion and prevents from cracking refractory lining rings 2 and 3 when heated. The choice of the design parameters of the buffer layer 6 due to the following. The thickness of the buffer layer is from 10 to 100 mm When the thickness of the buffer layer is less than 10 mm there is a risk of cracking of the refractory rings as a result of their thermal expansion. When the thickness of the buffer layer is more than 100 mm there is a risk of formation of voids between the buffer layer and the refractory rings as a result of sintering of the buffer mass, the formed emptiness leading� to a burnout between refractory rings and, as a consequence, the emergency exit of the vacuum degasser from work. The support ring 4 is made of metal. The choice of the design parameters of the support metal ring 4 due to the following. The thickness of the support ring 4 is from 10 to 200 mm, and the difference between the outer and inner diameters from 30 to 150 mm. According to tests, it was found that when the thickness of the support ring is less than 10 mm, when exposed to high temperatures metal support ring 4 will be jarred. When the thickness of the supporting metal ring 4 to 10 mm and more such warpage occurs. Found that when the difference between the outer and inner diameters of the supporting metal rings 4 less than 30 mm l-shaped refractory ring 3 is impossible to attach securely to the lower part of the immersion nozzle. The tests have confirmed that the supporting metal ring 4, implemented in a patent-pending design with the recommended geometric dimensions, securely locks the refractory ring 2 and 3 from falling out from the immersion nozzle. It was also found that the operation of the supporting metal ring 4 of a thickness exceeding 200 mm, and the difference between the outer and inner diameters of more than 150 mm leads to awkwardness and a significant weighting the bottom of the pipe, except in this case essentially took�ivalsa the complexity of manufacturing and installation of metal support ring 4 in the immersion nozzle. In the process of developing a patent-pending submersible pipe determined the optimum ratio of the size of the bottom refractory ring 3 and the supporting metal ring 4, the geometric shape and final dimensions provide a secure fit and protection from destruction and sinking of the refractory lining of the rings 2 and 3 in the immersion nozzle of the vacuum degasser. In particular, when performing bottom refractory ring 3 d-shape (Fig.1, 2), the conducted research allow to state that to achieve a reliable fixation of lining rings 2, bottom refractory ring 3 and the supporting metal ring 4 must be performed with the following ratios of dimensions (Fig.2): L1=(0,1-0,8)L, where L1 is the value of the reference part g-ring L - the difference between the outer and inner diameters of the supporting metal ring 4. H1=(0,1-0,8)N, where H1 - the height of the bearing part g-ring H - the height of the ring. These dependencies are based on the results of several tests on the production. During testing it was found that: - the magnitude L1 of the bearing part g-ring less than 0.1 L is not enough for reliable fixing (installation) heat-resistant g-ring 3 on the supporting metal ring 4. This raises the probability of 'loss' g-ring from the nozzle. - perepelicina L1 support part of the g-ring more than 0.8 L the thickness of the lower part of the g-ring is minimal which can lead to the formation of cracks in the zone of the supporting metal ring 4, and, therefore, dramatically increases the probability of "spalling" the lower part of the l-shaped refractory ring 3, and, consequently, premature failure of the nozzle of the vacuum degasser. - when the value of H1 is less than 0.1 N, the height of the lower part of the g-ring maximum, in this regard, the possible formation of cracks in the zone of the supporting metal ring 4, and, consequently, increases the probability of "cleavage" bottom g-ring 3, and, consequently, premature failure of the nozzle of the vacuum degasser. - when the value of H1, more than 0.8 N this design is not reasonable, because the lower part of the g-ring 3 minimum that determines the possibility of contact of the supporting metal ring 4 with the liquid metal. Patented nozzle submersible used as follows. The submersible pipe is determining constructive node of vacuum degasser, which is designed for removal from liquid steel of harmful gases and nonmetallic inclusions formed during melting and adversely affecting the quality of the metal and finished steel. The vacuum degasser operates as follows. The lower part of the vacuum degasser, which consists of one or two joints immersed in molten steel, after which vakuumirovat�s began circulating or batch method. Unlike the design of the immersion nozzle is presented in the patent of Russian Federation №96574, the developed device between the metal construction and refractory rings (including bottom refractory ring G-shaped) placed a buffer layer that protects the refractory ring from cracking during thermal expansion of the refractory rings are in operation, which leads to increased operational reliability and durability patented submersible connection. High operational reliability and durability patent-pending design is also guaranteed by the fact that the supporting metal ring 4, implemented in design with patent pending dimensions, retains its strength and thermal characteristics during the entire cycle of operation of the immersion nozzle and securely locks the refractory ring 2 and 3 from falling out from the immersion nozzle. Simple design metal parts facilitates the process of its production and Assembly of the pipe as a whole. Trials and testing of the prototype of the patent-pending pipe for submersible vacuum degasser confirmed: - high operational reliability of the nozzle; - increase the average resistance of a branch pipe by 10-15%. Confirmed that the use of the patent pending design of the immersion nozzle allows su�significantly increase the resource of uninterrupted operation of the vacuum degasser compared to the design proposed in the draft of the lining of vacuum degasser No. 1 HTMK-538-RH and in the project of a lining of vacuum degasser No. 2 HTMK-535-RH. 1. The submersible pipe for vacuum treatment units consisting of a metal structure, lined with refractory rings and lined with refractory concrete, characterized in that the bottom refractory ring is made g-shaped form, and the nozzle is provided with a supporting metal ring that is fixed under mentioned bottom refractory ring, wherein between the inner surface of the metal structure and the outer surface of the refractory rings, including the bottom refractory ring compensating thermal expansion buffer layer. 2. The pipe according to claim 1, characterized in that a buffer layer made of wadding buffer weight or refractory concrete. 3. The pipe according to claim 1, characterized in that the thickness of the buffer layer is from 10 to 100 mm. 4. The pipe according to claim 1, characterized in that the bottom refractory ring g-shaped with the following ratios of dimensions: 5. The pipe according to claim 1, characterized in that the lower portion of the support portion of the lower d-shaped refractory rings are made at an angle relative to th�santali. 6. The pipe according to claim 1, characterized in that the lower portion of the support portion of the lower d-shaped refractory ring is arcuate in shape. 7. The pipe according to claim 1, characterized in that the lower portion of the support portion of the lower d-shaped refractory ring is made in the form of a comb. 8. The pipe according to claim 5, characterized in that the side of the base metal ring, coupled with the lower section of the bearing part of the lower d-shaped refractory rings, are made at an angle relative to the horizontal. 9. The nozzle according to claim 6, characterized in that the side of the base metal ring, coupled with the lower section of the bearing part of the lower d-shaped refractory ring is arcuate in shape. 10. The pipe according to claim 1, characterized in that the side of the base metal ring, coupled with the lower section of the bearing part of the lower l-shaped refractory ring, made in the form of a comb. 11. Nozzle according to one of claims.5, 6, 7, characterized in that the supporting metal ring formed to a thickness of 10 to 200 mm. 12. Nozzle according to one of claims.5, 6, 7, characterized in that the difference between the outer and inner diameters of the supporting metal ring is from 30 to 200 mm.
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