US3797712A - Compound body nozzle for a container holding a liquid melt - Google Patents

Compound body nozzle for a container holding a liquid melt Download PDF

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Publication number
US3797712A
US3797712A US00132134A US3797712DA US3797712A US 3797712 A US3797712 A US 3797712A US 00132134 A US00132134 A US 00132134A US 3797712D A US3797712D A US 3797712DA US 3797712 A US3797712 A US 3797712A
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US
United States
Prior art keywords
nozzle
flow passage
main component
insert
shield body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00132134A
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English (en)
Inventor
H Kutzer
W Weinreich
L Harmsen
G Fricke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Didier Werke AG
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Didier Werke AG
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Filing date
Publication date
Application filed by Didier Werke AG filed Critical Didier Werke AG
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Publication of US3797712A publication Critical patent/US3797712A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica

Definitions

  • a container for a liquid melt has a nozzle with a flow passage.
  • a refractory ceramic material supports the nozzle and an insert of highly wear resistant refractory material limits the flow passage of the nozzle.
  • the insert comprises a shield body or bodies of oxide ceramic or cermet having a thickness of 5% to 20% of the diameter of the flow passage.
  • the flow passage of the shield body is the same or less than the flow passage of the nozzle.
  • the invention refers to the casting of metals, particularly liquid steel, for example in the bottom pouring of multiple molds, ingot molds or continuous casting and relates to a nozzle formed as a compound body in a container holding the liquid melt.
  • the molten metal goes from the pouring ladle through an intermediate container (tundish) into the continuous casting mold, that is to say through a refractory ceramic nozzle set on the bottom of the intermediate container. It is important that during the total duration of the casting process the cross section of the flow passage opening of the outlet be kept free, in order to insure a uniform running speed and pouring efficiency.
  • the free cross section of the flow passage can be narrowed by an increase of a crust or the clogging of the flow passage.
  • This phenomenon occurs particularly when pouring steel melt containing additions of aluminum, silicon, manganese or titanium and can be explained by the formation of liquid to pasty mixed crystals through deoxidation, which may adhere to the surface of the flow passage which has been sensitized through deoxidation products such as for instance Al-
  • the determining factor for the extent of such a phenomenon is the concentration of these additions in the melt and their temperature, because in the case of a constant concentration and a decrease of temperature of the melt the degree of saturation can be exceeded, which favors the formation of a crust.
  • the free cross section of the flow passage inthe nozzle can be enlarged through corrosionQwhich for instance can be due to the fact that FeO and/or deoxidation products together with the components of the refractory material of the nozzle form a low melting eutetic mixture.
  • a known nozzle In order to prevent a premature wearing action, a known nozzle carries on the upper part of the inlet of the nozzle passage a ring shaped element made of a highly refractory material such as magnesite which is particularly resistant to the flow of the liquid melt, and which compared to the surrounding nozzle material is at asmorawsar res at (DPS 638 612)- and molybdenum and/or tungsten (Austrian patent A 10 478/64).
  • An object of this invention is to eliminate the above mentioned difficulties and defects and to provide nozzles used for the passage of molten metal which are improved with regard to their wear resistance as well as the formation of incrustations in the flow passage.
  • a further object according to the invention is to provide in a compound nozzle of refractory ceramic support material, one or several inserts of refractory oxide ceramic material which are set in order to limit the flow passage, these inserts constituting shield bodies of a thickness of from 5 percent to 20 percent of the diameter of the flow passage, whereby it is of advantage if their flow passage is either of the same size or smaller than the flow passage of the nozzle.
  • a particular advantage of the invention is that due to the higher thermal conductivity of the oxide ceramic material or of the hard material of the insert as compared to the ceramic support material a higher heat dissipation and a higher resistance against corrosion in the area of the insert is obtained.
  • the flow passage in the supporting material of the nozzle may advantageously have a ridge which acts as a support for the insert, against which the insert is held by a ring element made of the same refractory material as the supporting material whereby the interior opening is shaped as part of the flow passage of the nozzle and on its free end as the inlet profile of the nozzle.
  • the spacers may be in the form of collars made of the same material as the supporting material or another refractory material, whereby their flow passages may be of the same size or smaller than the flow passage of the nozzle at the (ridge) in the supporting material, ie., the same size as the insert openings.
  • This type of assembly and mounting of the nozzle allows the usage of insertable spacing collars of varying length in the manner of an assembly of prefabricated machine parts, that is to say a variable adaptability of the position of the inserts in the area of the flow passage to the technical requirements for melting and casting.
  • Refractory materials which according to the invention may be used for manufacturing inserts have proven to be corundum, zircon silicate, zircon oxide or material composed to a greater part of these components.
  • Great capacity of resistance against corrosive and erosive attack, particularly in the case of steel melts, has been shown by inserts of powder metallic hard materials, for example with a basis of molybdenum and zirconium oxide.
  • the supporting material of nozzles according to the invention may be very advantageously made of quartz.
  • the utilization of hard materials in such a combination within a nozzle produces an optimal resistance and does not show any noticeable wear and tear even after pouring several consecutive batches.
  • the supporting material of the nozzle which to a certain extent does show wear and tear plays the role of a carrier of the insert, guide of the pouring jet and heat insulator, whereas the insert mainly provides for a constant flow quantity and pouring speed.
  • FIG. 1 shows a longitudinal section of a tundish nozzle according to the known art
  • FIGS. 2 and 3 each show a longitudinal section of a tundish nozzle with ring disk in accordance with the present invention
  • FIG. 4 shows a longitudinal section of a further type of a tundish nozzle with several inserted ring disks
  • FIG. 5 shows a plan view of a ring disk
  • FIG. 6 shows a longitudinal section of a tundishimmersion type nozzle with several inserted ring disks.
  • FIG. I shows tundish-outlet or nozzle of a known form, and according to the invention as shown in FIGS. 2 4, is shown as a compound body, composed of a main component I of a refractory supporting material, for instance quartz with approximately 14 percent Cr O one or more ring disks 2, 2 of hard material, so called cermet with a basis of zirconium oxide and molybdenum, and a holding ring 3 as well as in certain cases one or more spacer collars 4, both made of the same refractory material as the supporting material.
  • the interior flow passage of the holding ring and spacer collar forms one part of the flow-through passage 5 of the nozzle and thus coincides with its inner diameter.
  • the ring disk 2 is set in the intake side.
  • the ring supporting surface for the ring disk is a ridge 1 which extends radially outwardly from said flow-passage and in all the forms of construction is simultaneously formed or subsequently shaped by cutting into the supporting material of the main body.
  • the holding ring 3 is correspondingly shaped and is set from above onto the inserted ring disk 2 and together with the latter and the supporting material it is strongly joined through an adequate refractory mortar.
  • FIG. 3 shows a ring disk mortared in at the discharge end of the nozzle.
  • FIG. 6 A transferal of the ring disk location according to FIG. 4 onto an immersion nozzle located on a tundish of a continuous casting installation for immersion into the continuous casting mold is shown in FIG. 6.
  • the main body of the quartz support material is shown at la.
  • tundish nozzle made of 100 percent SiO and 14 percent Cr O and a 2mm thick hard material shield composed mainly of molybdenum and zirconium oxide, for instance, steel with the following analysis can be faultlessly poured:
  • the ring disk as shown in FIG. 5 may have a number of perforations 6 concentrically arranged around the flow passage, the number and size of the perforations being variable.
  • the invention is not limited to these examples and that it can be used not only for all types of nozzles of containers containing liquid melt, but that particularly by varying the refractory materials used for the supporting material, the holding ring and the spacer collars subject to wear on one hand and the oxide ceramic material or hard material of the ring disks on the other hand, the nozzles can be used for different purposes and the way of pouring melt may be varied.
  • a nozzle for use in a container containing a liquid melt comprising a main component formed of a refractory ceramic material, said main component having a flow passage extending therethrough;
  • said insert comprising a shield body formed of a highly wear resistant refractory material selected from the group consisting of a ceramic oxide and cermet, said shield body having a thickness of from 5 t of thss iaaistqr sfsai fl w nassa stsaii shield body comprising a ring-shaped disc set within said main component, said ring-shaped disc having a plurality of perforations therein concentrically arranged around said opening.
  • a nozzle as claimed inclaim 1 wherein said highly wear resistant refractory material is further selected from the group consisting of corundum, zircon and silicate, zircon oxide.
  • a nozzle for use in a container containing a liquid melt said nozzle comprising I a main component formed of a refractory ceramic material, said main component having a flow passage extending therethrough; and
  • said insert comprising a shield body formed of a highly wear resistant refractory material selected from the group consisting of a ceramic oxide and cermet, said shield body having a thickness of from 5 to 20% of the diameter of said flow passage, said main component having a ridge extending radially outwardly from said flow passage, said shield body positioned on said ridge and further comprising a holding ring retaining said shield body against said ridge, said holding ring having an interior opening forming a portion of said flow passage.
  • a nozzle as claimed in claim 4, wherein said at least one insert comprises a plurality of shield bodies spaced within said main component, and further comprising spacer collars having openings therethrough positioned between adjacent of said shield bodies.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Continuous Casting (AREA)
US00132134A 1970-04-23 1971-04-07 Compound body nozzle for a container holding a liquid melt Expired - Lifetime US3797712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2019541A DE2019541C3 (de) 1970-04-23 1970-04-23 Als Verbundkörper ausgebildeter Ausguß an flüssige Metallschmelze enthaltenden Behältern

Publications (1)

Publication Number Publication Date
US3797712A true US3797712A (en) 1974-03-19

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ID=5768889

Family Applications (1)

Application Number Title Priority Date Filing Date
US00132134A Expired - Lifetime US3797712A (en) 1970-04-23 1971-04-07 Compound body nozzle for a container holding a liquid melt

Country Status (12)

Country Link
US (1) US3797712A (de)
JP (1) JPS5147650B1 (de)
AT (1) AT312834B (de)
BE (1) BE765422A (de)
CA (1) CA942030A (de)
CH (1) CH550625A (de)
DE (1) DE2019541C3 (de)
FR (1) FR2086273B1 (de)
GB (1) GB1341239A (de)
LU (1) LU62918A1 (de)
NL (1) NL7105584A (de)
ZA (1) ZA711974B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4108339A (en) * 1976-12-13 1978-08-22 Leco Corporation Integral nozzle with gas delivery manifold
EP0080248A1 (de) * 1981-11-25 1983-06-01 Gr-Stein Refractories Limited Feuerfestbestandteile
US4843692A (en) * 1983-01-17 1989-07-04 Electric Power Research Institute Casting nozzle with discharge slot defined by refractory inserts
US4960245A (en) * 1983-01-17 1990-10-02 Electric Power Research Institute Casting nozzle with discharge slot defined by refractory inserts
US5969937A (en) * 1996-03-27 1999-10-19 Siemens Energy & Automation, Inc. Snap-on basepan system
US20110017784A1 (en) * 2009-07-24 2011-01-27 Krosakiharima Corporation Molten metal discharge nozzle
US20130228597A1 (en) * 2010-10-20 2013-09-05 Damien Delsine Tube for pouring liquid metal, assembly of a tube and a metal frame and metal frame
CN109648068A (zh) * 2019-01-29 2019-04-19 大冶特殊钢股份有限公司 一种感应加热中间包流钢通道及其防护方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807123A1 (de) * 1978-02-20 1979-08-30 Didier Werke Ag Bodenausguss fuer metallurgische gefaesse zur aufnahme von stahlschmelze, insbesondere tundish
DE4003608C1 (de) * 1990-02-07 1991-06-27 Didier-Werke Ag, 6200 Wiesbaden, De
EP2656945A1 (de) * 2012-04-26 2013-10-30 SMS Concast AG Feuerfestes Giessrohr für eine Kokille zum Stranggiessen von Metallschmelze
CN105689698A (zh) * 2016-03-09 2016-06-22 日照钢铁控股集团有限公司 异型坯连铸的制动式浸入水口

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191507731A (en) * 1915-05-25 1916-01-13 Sydney Walker Williamson Improvements in Foundry Ladles.
GB224113A (en) * 1923-12-27 1924-11-06 John Knowles Hassall Improved nozzle for ladles used in pouring molten metal
GB266050A (en) * 1925-11-17 1927-02-17 William Thomas Lewis Lintern Improved teeming nozzle for ladles for molten metal
GB909458A (en) * 1958-02-24 1962-10-31 Celso Beltrami Improvements in plate channels for pouring liquid steel into ingot moulds
US3428464A (en) * 1965-02-02 1969-02-18 Alchem Ltd Refractory coating compositions
US3435992A (en) * 1966-03-11 1969-04-01 Tisdale Co Inc Pouring nozzle for continuous casting liquid metal or ordinary steel
DE1905995A1 (de) * 1968-02-15 1969-09-25 Inst Der Feuerfest Ind Giesspfannenausguss,insbesondere fuer das Stahlstranggiessen
US3604598A (en) * 1969-07-09 1971-09-14 United States Steel Corp Outlet passage construction for teeming vessels

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191507731A (en) * 1915-05-25 1916-01-13 Sydney Walker Williamson Improvements in Foundry Ladles.
GB224113A (en) * 1923-12-27 1924-11-06 John Knowles Hassall Improved nozzle for ladles used in pouring molten metal
GB266050A (en) * 1925-11-17 1927-02-17 William Thomas Lewis Lintern Improved teeming nozzle for ladles for molten metal
GB909458A (en) * 1958-02-24 1962-10-31 Celso Beltrami Improvements in plate channels for pouring liquid steel into ingot moulds
US3428464A (en) * 1965-02-02 1969-02-18 Alchem Ltd Refractory coating compositions
US3435992A (en) * 1966-03-11 1969-04-01 Tisdale Co Inc Pouring nozzle for continuous casting liquid metal or ordinary steel
DE1905995A1 (de) * 1968-02-15 1969-09-25 Inst Der Feuerfest Ind Giesspfannenausguss,insbesondere fuer das Stahlstranggiessen
US3604598A (en) * 1969-07-09 1971-09-14 United States Steel Corp Outlet passage construction for teeming vessels

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4108339A (en) * 1976-12-13 1978-08-22 Leco Corporation Integral nozzle with gas delivery manifold
EP0080248A1 (de) * 1981-11-25 1983-06-01 Gr-Stein Refractories Limited Feuerfestbestandteile
US4843692A (en) * 1983-01-17 1989-07-04 Electric Power Research Institute Casting nozzle with discharge slot defined by refractory inserts
US4960245A (en) * 1983-01-17 1990-10-02 Electric Power Research Institute Casting nozzle with discharge slot defined by refractory inserts
US5969937A (en) * 1996-03-27 1999-10-19 Siemens Energy & Automation, Inc. Snap-on basepan system
US20110017784A1 (en) * 2009-07-24 2011-01-27 Krosakiharima Corporation Molten metal discharge nozzle
CN102317006A (zh) * 2009-07-24 2012-01-11 黑崎播磨株式会社 熔融金属排出用浇注嘴
US8469243B2 (en) * 2009-07-24 2013-06-25 Krosakiharima Corporation Molten metal discharge nozzle
CN102317006B (zh) * 2009-07-24 2014-07-16 黑崎播磨株式会社 熔融金属排出用浇注嘴
US20130228597A1 (en) * 2010-10-20 2013-09-05 Damien Delsine Tube for pouring liquid metal, assembly of a tube and a metal frame and metal frame
US9517505B2 (en) * 2010-10-20 2016-12-13 Vesuvius Group S.A. Tube for pouring liquid metal, assembly of a tube and a metal frame and metal frame
CN109648068A (zh) * 2019-01-29 2019-04-19 大冶特殊钢股份有限公司 一种感应加热中间包流钢通道及其防护方法

Also Published As

Publication number Publication date
CA942030A (en) 1974-02-19
DE2019541A1 (de) 1971-11-18
ZA711974B (en) 1971-12-29
CH550625A (de) 1974-06-28
FR2086273A1 (de) 1971-12-31
GB1341239A (en) 1973-12-19
JPS5147650B1 (de) 1976-12-16
DE2019541B2 (de) 1974-06-20
DE2019541C3 (de) 1975-02-06
AT312834B (de) 1974-01-25
NL7105584A (de) 1971-10-26
FR2086273B1 (de) 1975-06-06
LU62918A1 (de) 1971-08-26
BE765422A (fr) 1971-08-30

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