EP0088059A1 - Lanze - Google Patents

Lanze Download PDF

Info

Publication number
EP0088059A1
EP0088059A1 EP83850030A EP83850030A EP0088059A1 EP 0088059 A1 EP0088059 A1 EP 0088059A1 EP 83850030 A EP83850030 A EP 83850030A EP 83850030 A EP83850030 A EP 83850030A EP 0088059 A1 EP0088059 A1 EP 0088059A1
Authority
EP
European Patent Office
Prior art keywords
lance
head
insulation
refractory
nozzle tubes
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.)
Withdrawn
Application number
EP83850030A
Other languages
English (en)
French (fr)
Inventor
Lennart Sträng
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0088059A1 publication Critical patent/EP0088059A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
    • 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
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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

Definitions

  • the invention relates to a metallurgical lance useful for refining metal melts by injecting a gas, mainly air or oxygen gas (oxygen-enriched air), or for supplying alloying elements in powder form by means of a carrier gas.
  • a gas mainly air or oxygen gas (oxygen-enriched air)
  • oxygen-enriched air oxygen-enriched air
  • Metallurgical lances for the purposes indicated above consist as principal parts of a metal tube, usually a steel tube, surrounded by a tubular refractory insulation, the lower end of the tube being provided with a lance tip made of refractory ceramic material into which is cast a tip attachment with laterally extending distributing tubes or nozzles for even distribution of the injection medium.
  • the tip of the lance is usually designed as a metal sleeve having a central bore, from which the distributing tubes or nozzles extend and which in attaching the tip of the lance to the central lance tube forms a direct extension of the central passage channel thereof for the injection medium.
  • the distributing device for the injecting medium is designed as a bolt-like body consisting of a head in the form of a flange and a threaded hollow pin extending centrally therefrom.
  • This bolt-like body is welded to the end of the central lance tube so that its cavity forms a direct extension of the passage of the lance tube.
  • the head or flange of said body is drilled in even distribution about its mantle surface to form holes extending to the distributing chamber wherein the distributing tubes or nozzles are fitted.
  • the lance tube with the distributing body welded thereto may then be inserted into a refractory insulating tube of a known type, suitably of the type described in our above-identified patent application.
  • a refractory insulating tube of a known type, suitably of the type described in our above-identified patent application.
  • the insulation may also apply the insulation as a monolith or as cylindric shaped bodies attached to each other by joint sealing mass onto the lance tube.
  • the lower surface of this refractory insulation is provided with a central recess corresponding to the flange or head of the distributing body and with chutes or channels extending therefrom wherein the distributing tubes or nozzles are fitted.
  • chutes or channels may, of course, also be arranged in the upper surface of the tip of the lance, which is particularly preferred, or partitioned between the lower surface of the insulation and the upper surface of the tip of the lance.
  • the refractory insulation of the free surfaces of the distributing body is provided.
  • This is obtained by using a separate lance head made of refractory mass and having a planar upper surface-wherein there opens a hole with interior threads matching the threads of the bolt-like distributing body.
  • This refractory lance head is screwed onto the threaded pin of the distributing body, suitably while applying a jointing mortar for filling out the gaps between the threads and irregularities between the planar upper surface of the lance head, the head or flange and the lower surface of the lance tube insulation.
  • the lance head is provided with a through-going axial bore, wherein it is secured with a nut engaging the threads of the bolt-like body and resting on a shoulder in the said bore.
  • Fig. 1 shows a complete lance with the lower part at the tip of the lance being shown in section.
  • Fig. 2 shows a section along the line II-II in Fig. 1.
  • Fig. 3 shows on a larger scale the design of the distributor and its connection to the lance tube.
  • a device having a central lance tube 1 and 2, a flow passage 2 for the Injection medium arranged therein.
  • the lance tube 1 is surrounded by a tubular refractory insulation 3 and the lance terminates at the lower end with a lance head 4 also made from a refractory material.
  • the distributor or spreader for the injection medium, generally designated 5 consists of a head or a flange 6 from which a threaded pin 7a extends. Centrally from the head or flange 6 and down into pin 7a a distributing chamber 8 is drilled which when distributor 5 is welded to lance tube 1 as indicated at 9 will constitute an extension of bore 2 of lance tube 1.
  • holes 10 With even distribution around flange 6 the latter is provided with a number - suitably three - holes 10 extending into the distributing chamber 8. In these holes spreader tubes or nozzles 11 are inserted. At their inner part holes 10 have a somewhat smaller diameter than in the outer part so that between said parts a shoulder or stop 12 for the inserted nozzle tube 11 will be provided.
  • Lance head 4 is cast of a refractory mass about a core having a diameter corresponding to the threads of pin 7a to enable in assembly inserting this pin for engagement or contact with the lower surface of flange 6 and the lower surface of insulation 3.
  • the attachment of distributor 5 to the lance head 4 is done by a nut 7b screwed onto pin 7a from below through a central bore 16 (Fig. 1) which is then sealed with a refractory plug 18.
  • a suitable quantity of jointing mortar is supplied in assembly, said mortar when attaching lance head 4 by screwing.being squeezed out between the threads and between the contact surfaces to form a joint between the insulation 3 of the lance tube and the head 4 of the lance.
  • an eccentric 14 is provided which through a spring 15 imparts downward bias to insulation 3.
  • a spring 15 imparts downward bias to insulation 3.
  • it is suitable in order to obtain soft contact to arrange a ceramic fibre disc 16 between the upper surface of the flange 6 and the lower end of insulation 3.
  • the distributing body 5 is welded 9 to the end of lance tube 1.
  • nozzles 11 are fitted into holes 10 and lance tube 1 with the welded distributing body 5 into insulation 3, so that flange 6 of the distributing body 5 will fit into a corresponding recess in the lower surface of insulation 3 and the distributing tubes or nozzles 11 will fit into corresponding recesses in the upper surface of lance head 4.
  • the contact surfaces are sealed with refractory jointirg mass or mortar.
  • spring 15 and eccentric 14 are brought into engagement against the upper surface of insulation 3.
  • Device 14 is locked against the central lance tube 1 after which by means of eccentric 14 the insulation is biassed towards the upper side of flange 6 or a ceramic fibre packing applied thereto.
  • the nozzles 11 will not, as in constructions heretofore used, be cast into the interior of the ceramic lance head 4. This in turn means on the one hand that the crack-forming heat stresses between the nozzles and the ceramic insulation will be avoided and on the other hand the nozzles may easily be removed and replaced with new ones if for example clogging will arise in connection with injection of alloying powder.
  • the invention is not limited to the embodiment described above.
  • the lance can be modified in regard to the design and attachment of distributor 5, the number of distributing tubes 11, their orientation, which need not be radial, i.e. normal to the longitudinal axis of the lance, etc.
  • the essential feature of the invention is the position of distributor 5 and distributing tubes 11 in the area between lance tip 4 and insulation 3 which results in extended period of life, facilitated maintenance and thus reduced operational interruptions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
EP83850030A 1982-02-08 1983-02-07 Lanze Withdrawn EP0088059A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8200723 1982-02-08
SE8200723A SE448026B (sv) 1982-02-08 1982-02-08 Metallurgisk lans

Publications (1)

Publication Number Publication Date
EP0088059A1 true EP0088059A1 (de) 1983-09-07

Family

ID=20345944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83850030A Withdrawn EP0088059A1 (de) 1982-02-08 1983-02-07 Lanze

Country Status (5)

Country Link
EP (1) EP0088059A1 (de)
DK (1) DK50883A (de)
ES (1) ES8402619A1 (de)
FI (1) FI830343L (de)
SE (1) SE448026B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573798B2 (en) * 1984-03-16 1988-06-23 Oxy-Tuben A.B. Metallurgical lance coated with organic fibres at least partially impregnated with refactory

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2005815A (en) * 1977-10-04 1979-04-25 Stiftelsen Metallurg Forsk Lance for injecting powdery material into molten metal
DE2934292A1 (de) * 1978-12-11 1980-06-19 Chamotte Gibbons Continental B Spuellanze
WO1980001923A1 (en) * 1979-03-16 1980-09-18 Hoeganaes Ab Refractory lining for a metal pipe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2005815A (en) * 1977-10-04 1979-04-25 Stiftelsen Metallurg Forsk Lance for injecting powdery material into molten metal
DE2934292A1 (de) * 1978-12-11 1980-06-19 Chamotte Gibbons Continental B Spuellanze
WO1980001923A1 (en) * 1979-03-16 1980-09-18 Hoeganaes Ab Refractory lining for a metal pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU573798B2 (en) * 1984-03-16 1988-06-23 Oxy-Tuben A.B. Metallurgical lance coated with organic fibres at least partially impregnated with refactory

Also Published As

Publication number Publication date
DK50883A (da) 1983-08-09
ES519584A0 (es) 1984-02-01
SE8200723L (sv) 1983-08-09
DK50883D0 (da) 1983-02-07
FI830343A0 (fi) 1983-02-01
SE448026B (sv) 1987-01-12
FI830343L (fi) 1983-08-09
ES8402619A1 (es) 1984-02-01

Similar Documents

Publication Publication Date Title
FI73464C (fi) Dysa foer injektionslans.
US5024422A (en) One-piece stopper rod
US2510230A (en) Electrode joint
US4434540A (en) Process for repairing or modifying refractory plates of ladle casting cassettes
US5249778A (en) Gas stir plug device with visual wear indicator
FI61419B (fi) Skjutport foer en gjutoeppning foer smaelt metall
CA2447072C (en) Stopper for reliable gas injection
EP0088059A1 (de) Lanze
US4091971A (en) Molten metal nozzle having capillary gas feed
GB2120369A (en) An improved metallurgical lance
US4784302A (en) Gas atomization melt tube assembly
US5614121A (en) Refractory block for continuous casting
RU2129165C1 (ru) Устройство для донной продувки металла
US4022445A (en) Converter bottom structure
US5156801A (en) Low porosity-high density radial burst refractory plug with constant flow
US5112029A (en) Quick fluid injection assembly replacement in metallurgical reacters
FI77589C (fi) Undervattensfoergripningsfoerfarande och -medel.
EP0297067A1 (de) Metallurgische Düse
US3614083A (en) Outside change tuyere
SU819182A1 (ru) Устройство дл измерени темпера-ТуРы МЕТАллА B KOHBEPTEPE
CN211170741U (zh) 一种出钢孔结构
RU2083821C1 (ru) Инструмент для разрушения минеральных и искусственных материалов
RU2243267C1 (ru) Фурма для донной продувки металла газами в ковше и способ ее изготовления
JPS5888520A (ja) スラリ−燃料用バ−ナチツプ
RU2086763C1 (ru) Инструмент для разрушения минеральных и искусственных материалов

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19840124

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19850529