US20060119019A1 - Gas flushing device for metallurgical melting pots - Google Patents

Gas flushing device for metallurgical melting pots Download PDF

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Publication number
US20060119019A1
US20060119019A1 US10/540,164 US54016405A US2006119019A1 US 20060119019 A1 US20060119019 A1 US 20060119019A1 US 54016405 A US54016405 A US 54016405A US 2006119019 A1 US2006119019 A1 US 2006119019A1
Authority
US
United States
Prior art keywords
gas purging
receptacle
purging device
gas
brick
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.)
Abandoned
Application number
US10/540,164
Other languages
English (en)
Inventor
Johannes Taferner
Alfred Wilpernig
Romano Maion
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Assigned to REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG reassignment REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAION, ROMANO, TAFERNER, JOHANNES, WILPERNIG, ALFRED
Publication of US20060119019A1 publication Critical patent/US20060119019A1/en
Abandoned legal-status Critical Current

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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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/22—Arrangements of air or gas supply devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F27D2003/164—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/167—Introducing a fluid jet or current into the charge the fluid being a neutral gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention pertains to a gas purging device for metallurgical melting vessels.
  • Discrete gas purging plugs can be realized with so-called directional or non-directional porosity. “Directional porosity” is achieved, for example, with channels that extend in the flushing element. “Non-directional porosity” can be achieved with a porous refractory material that has corresponding gas permeability.
  • Gas flushing devices can be installed into a refractory lining of a metallurgical melting vessel that forms a wall or the bottom of the vessel. However, they may also be realized in the bottom or a wall in-situ, for example, as described in EP 0 560 834 B1.
  • Gas flushing elements primarily serve for conducting gas. However, a gas flushing device of this type may also conduct gas/solid mixtures in certain instances.
  • the gases used may be inert gases, for example, when flushing ladles. However, it is also known to flush with oxygen, for example, in electric furnaces.
  • FIG. 1 shows a conventional gas purging device.
  • a so-called gas purging lance L is guided into the bottom region H of an electric furnace from outside, wherein said lance is held on the outer casing A of the vessel with the aid of washers B and mounted by means of a flange.
  • a well nozzle S is placed over the lance L and a mass is filled between the well nozzle and the lance.
  • the well nozzle S is subsequently walled in with bricks M and the bottom H is then lined with a furnace mass.
  • the invention proposes to separate the parts of the gas purging device that are subject to particular wear, i.e., the parts of the gas flushing device that are situated adjacent to the molten metal or the parts situated at the gas outlet end, from the parts arranged upstream thereof, i.e., in the direction of the gas inlet end.
  • the actual flushing element is realized in a monolithic mass in the section that is situated adjacent to the wall of the melting vessel. This mass simplifies the alignment of the flushing element during the installation of the flusher. This mass can also be cleared and replaced more easily when the flushing device is torn down.
  • the mass may be arranged, in turn, in a permanent receptacle that is not exchanged when the flusher (purging element) is replaced.
  • the invention pertains to a gas purging device for metallurgical melting vessels with the following characteristics:
  • a gas purging brick is arranged in an upper cylindrical receptacle with its end on the gas outlet side and in a lower cylindrical receptacle with its adjacent section, and
  • the gas purging brick, the receptacles and the mass are made of a refractory ceramic material.
  • cylindrical merely refers to a body that is open on opposite sections and serves for accommodating another body, wherein this term does not imply any other geometric restrictions.
  • the lower receptacle is not subjected to wear in the normal operating state and can be enclosed with refractory bricks or a refractory mass (hearth mass) that also remains as a permanent lining when a replacement is required. Its serves for receiving a refractory ceramic mass, for example, a ramming mass, which simultaneously serves for adjusting the purging element (gas purging brick) when it is aligned in the lower receptacle and embedded in the mass.
  • the upper cylindrical receptacle is situated adjacent to and practically forms an extension of the lower receptacle (referred to the flow direction of a gas or the direction toward the molten metal).
  • This upper receptacle may have, for example, a circular inside cross section and encloses the purging device in a more or less direct fashion such that it forms a mechanical guide as well as a protection against chemical attacks.
  • the gas purging element may be arranged in the upper receptacle (i.e., on the “hot side”) flush or with slight clearance. It
  • the gas purging brick usually extends over the entire length (height) of the upper and the lower receptacle. It may also protrude the upper receptacle by a short distance (when mounted).
  • the gas connection and, if applicable, a gas distribution chamber for distributing gas to individual channels or pores are situated on the other end.
  • the flusher may have a circular cross section.
  • gas flushing elements in the shape of truncated cones or cuboid geometries may also be utilized.
  • the upper receptacle When using a cuboid purging element, the upper receptacle accordingly has a rectangular cross section.
  • cylindrical receptacle should be understood in the form of an enclosure for a certain length of the gas purging element regardless of its inside cross section.
  • the outside cross section may have an arbitrary shape.
  • At least one receptacle may be realized in the form of a pressed part. Pressed enclosure parts for the flushing element are particularly tight and consequently wear-resistant.
  • the purging element itself can be realized with directed or non-directed porosity. Purging elements with directed porosity are used, in particular, when purging electric furnaces with oxygen. This can be achieved by realizing the purging element with several tubular channels that extend in the axial direction and consist, for example, of small metal or ceramic tubes.
  • the purging element may be equipped with an additional lance (separate gas supply for purging element and lance) or consist merely of a lance lined with refractory material.
  • the length of the upper receptacle is determined in dependence on the respective application and the expected wear, namely because only the upper receptacle should be subsequently replaced.
  • the upper receptacle is at least as long as the lower receptacle.
  • the upper receptacle may be up to four-times as long as the lower receptacle referred to the axial direction of the flushing element, i.e., in the flow direction of the gas.
  • the upper receptacle is two-times to three-times as long as the lower receptacle.
  • the upper receptacle may have a cross-sectional shape that makes it possible to directly place the upper receptacle on the lower receptacle.
  • the upper receptacle may also have a wall thickness that corresponds to the wall thickness of the refractory mass introduced between the flushing element and the lower receptacle as discussed below in the description of the figures.
  • the gas purging device has a stepped cross section as shown in the right part of FIGS. 1, 2 .
  • the upper receptacle ends at a certain distance in front of the lower receptacle or protrudes into the lower receptacle.
  • the described gas purging device can be installed into the bottom or a wall of a metallurgical melting vessel.
  • metallurgical melting vessel includes all crucibles for melting metal and for treating molten metal, respectively.
  • the gas purging device consequently is also suitable for installation into the hearth bottom of an electric furnace, for example, an electric arc furnace.
  • the gas purging device comprises a total of four parts.
  • a lower receptacle 10 is initially inserted during the lining process. This receptacle is a pressed, refractory enclosure of annular shape. Subsequently, a purging brick 12 with directed porosity (channels 20 ) is inserted via the outer wall A through an opening 14 from below (from outside), and its section 12 u is centered in the lower receptacle 10 as well as the region situated thereunder with the aid of a ramming mass. The gas outlet end 12 o of the purging element 12 protrudes the lower receptacle 10 and the mass 16 , respectively.
  • An upper receptacle 18 that is also realized cylindrically analogous to the lower receptacle 10 is then placed over the upper section 12 o of the gas purging element, wherein the upper receptacle has an inside cross section that corresponds to the outside cross section of the gas purging element 12 .
  • the upper receptacle 18 is aligned with the annular channel, filled with the mass 16 , between the lower receptacle 10 and the purging element 12 .
  • the upper receptacle 18 is twice as long as the lower receptacle 10 .
  • the hearth mass H is ultimately introduced and the hearth bottom is formed.
  • the region underneath the lower receptacle 10 may also be equipped with mounting elements B analogous to the state of the art, for example, washers (as illustrated in the left part of FIGS. 1, 2 ) in order to fix the purging elements 12 on the outer wall A of the melting vessel.
  • mounting elements B analogous to the state of the art, for example, washers (as illustrated in the left part of FIGS. 1, 2 ) in order to fix the purging elements 12 on the outer wall A of the melting vessel.
  • the time required for lining the gas purging device shown in FIGS. 1, 2 is approximately one hour.
  • the time required for a lining process in accordance with the state of the art that is illustrated in the left part of FIGS. 1, 2 is approximately 2.5 hours.
  • Another advantage of the gas flushing device according to the invention can be seen in the fact that the lower receptacle 10 can remain when a replacement is required ( FIG. 2 ).
  • the zones of the hearth mass H that are situated adjacent to the outer wall A can be largely preserved such that the required quantity of new hearth mass is reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)
US10/540,164 2002-12-19 2003-10-18 Gas flushing device for metallurgical melting pots Abandoned US20060119019A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10259434.1 2002-12-19
DE10259434A DE10259434B3 (de) 2002-12-19 2002-12-19 Gasspüleinrichtung für metallurgische Schmelzgefäße
PCT/EP2003/011575 WO2004056505A1 (de) 2002-12-19 2003-10-18 Gasspüleinrichtung für metallurgische schmelzgefässe

Publications (1)

Publication Number Publication Date
US20060119019A1 true US20060119019A1 (en) 2006-06-08

Family

ID=32667510

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/540,164 Abandoned US20060119019A1 (en) 2002-12-19 2003-10-18 Gas flushing device for metallurgical melting pots

Country Status (12)

Country Link
US (1) US20060119019A1 (zh)
EP (1) EP1572398B1 (zh)
KR (1) KR20050084405A (zh)
CN (1) CN1315596C (zh)
AT (1) ATE338599T1 (zh)
AU (1) AU2003280394B2 (zh)
CA (1) CA2509137A1 (zh)
DE (2) DE10259434B3 (zh)
EG (1) EG23558A (zh)
MX (1) MXPA05006706A (zh)
PL (1) PL377817A1 (zh)
WO (1) WO2004056505A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060236812A1 (en) * 2003-08-23 2006-10-26 Andreas Flizwieser Method for the pyrometallurgical producing of copper in a converter
WO2023028283A1 (en) * 2021-08-27 2023-03-02 J.H. Fletcher & Co. System and method for porous plug removal and installation

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2845667B1 (en) * 2013-09-10 2015-09-02 Refractory Intellectual Property GmbH & Co. KG Ladle bottom and ladle
EP2942406B1 (de) * 2014-05-05 2016-04-13 Refractory Intellectual Property GmbH & Co. KG Feuerfestes keramisches Gasspülelement
ES2685248T3 (es) 2014-09-29 2018-10-08 Refractory Intellectual Property Gmbh & Co. Kg Dispositivo de fijación para un cuerpo hueco cerámico cilíndrico y un tapón de purga de gas cerámico refractario con un dispositivo de fijación de este tipo

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067693A (en) * 1989-03-15 1991-11-26 Etienne Lepoutre Electric arc oven for treating molten metals with a gas and a process therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6033163B2 (ja) * 1980-10-30 1985-08-01 新日本製鐵株式会社 転炉の底吹羽口熱間交換方法
AU541441B2 (en) * 1981-07-15 1985-01-10 Nippon Steel Corporation Bottom blowing nozzle embedded in a refractory block
IN168760B (zh) * 1987-04-10 1991-06-01 Injectall Ltd
DE3727938C1 (de) * 1987-08-21 1988-09-08 Didier Werke Ag Spuelstein
DE3833502A1 (de) * 1988-10-01 1990-04-05 Didier Werke Ag Gasspuelstein
CZ102193A3 (en) * 1990-12-07 1994-01-19 Veitsch Radex Ag Formation of a bottom or a wall of a metallurgical vessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067693A (en) * 1989-03-15 1991-11-26 Etienne Lepoutre Electric arc oven for treating molten metals with a gas and a process therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060236812A1 (en) * 2003-08-23 2006-10-26 Andreas Flizwieser Method for the pyrometallurgical producing of copper in a converter
WO2023028283A1 (en) * 2021-08-27 2023-03-02 J.H. Fletcher & Co. System and method for porous plug removal and installation
US11858033B2 (en) 2021-08-27 2024-01-02 J.H. Fletcher & Co. System and method for porous plug removal and installation

Also Published As

Publication number Publication date
EG23558A (en) 2006-06-05
DE50304988D1 (de) 2006-10-19
EP1572398B1 (de) 2006-09-06
EP1572398A1 (de) 2005-09-14
AU2003280394A1 (en) 2004-07-14
DE10259434B3 (de) 2004-08-26
PL377817A1 (pl) 2006-02-20
WO2004056505A1 (de) 2004-07-08
MXPA05006706A (es) 2005-09-08
CN1315596C (zh) 2007-05-16
KR20050084405A (ko) 2005-08-26
ATE338599T1 (de) 2006-09-15
AU2003280394B2 (en) 2006-12-14
CA2509137A1 (en) 2005-06-08
CN1729067A (zh) 2006-02-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG, AU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAFERNER, JOHANNES;WILPERNIG, ALFRED;MAION, ROMANO;REEL/FRAME:017444/0063

Effective date: 20050418

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION