EP0110806B1 - Système de réglage de l'alimentation en matières solides d'une lance de soufflage - Google Patents

Système de réglage de l'alimentation en matières solides d'une lance de soufflage Download PDF

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Publication number
EP0110806B1
EP0110806B1 EP83630175A EP83630175A EP0110806B1 EP 0110806 B1 EP0110806 B1 EP 0110806B1 EP 83630175 A EP83630175 A EP 83630175A EP 83630175 A EP83630175 A EP 83630175A EP 0110806 B1 EP0110806 B1 EP 0110806B1
Authority
EP
European Patent Office
Prior art keywords
gas
carbon
metering
containing material
lance
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
Application number
EP83630175A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0110806A1 (fr
Inventor
Jean Peckels
Antoine Schaaf
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Priority to AT83630175T priority Critical patent/ATE32351T1/de
Publication of EP0110806A1 publication Critical patent/EP0110806A1/fr
Application granted granted Critical
Publication of EP0110806B1 publication Critical patent/EP0110806B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a device and a method for adjusting the supply of solids to a lance used to supply a metal bath, in particular a cast iron bath in the process of refining.
  • the invention describes in particular a device and a method, suitable for the introduction of granulated combustible material using neutral carrier gases into the metal being refined in the context of the LD, LD-AC or LBE processes.
  • patent application FR 2 459 835 provides for blowing calcium carbide on the surface of the bath, and this by using refining oxygen as the vehicle for the carbide. It turns out that the carbide carried by the oxygen does not oxidize in the jet, which may a priori surprise.
  • carbides are compounds which are obtained by reactions consuming large amounts of energy which should exclude such a process at a time when energy is expensive.
  • the constraint of recarburizing the bath in reduced time is also reinforced if nitrogen is chosen as the carrier gas for reasons of cost price.
  • the nitrogen jet strikes the surface of the metal bath in the immediate vicinity of the refining oxygen.
  • the degree of dissolution of nitrogen in liquid steel increases with temperature.
  • the object of the invention is to provide a device and a method capable of rapidly injecting a high quantity of granulated combustible material into a metal bath from above.
  • FIG. 1 shows a possible embodiment of the system for adjusting the supply of the lance.
  • the insufflation lance 1 which can be a multiflux lance used to supply the bath jointly with oxygen and granulated material, or else a monoflux lance used to inject only granulated material into the bath. In the latter case, the refining oxygen and possibly the post-combustion oxygen is supplied by a separate lance.
  • the lance 1 is mounted on a quick fixing system 2, integral with a carriage or any other mobile system, not shown, used to approach the lance at the desired distance from the surface of the bath.
  • the fastening system is connected to a set 5 of rigid tubes 3 and articulations 4, known as shears as well as to a safety device 6 which detects possible leaks in the body of the lance 1.
  • the leak detection is particularly important in multiflow lances which jointly supply the fuel which is normally abrasive and the oxidizer and can for example be carried out using a sheath filled with a fluid, which surrounds the duct of carbonaceous material the lance and a pressure sensor which monitors the fluid pressure. In the event of a rupture, the sensor registers a pressure variation which it transmits to the safety device 6 which stops the blowing operation. It is also possible to design a cooling circuit so as to achieve at the same time a separation between the fuel and oxidizer conduits. In this case, monitoring of the cooling circuit pressure also allows leak detection.
  • the shears 5 can be connected at will to the circuit 7 supplying carbonaceous material or to the circuit 8 supplying sweep gas by acting on the electromagnetic valves 9 respectively 10.
  • the circuit 8 is used to send a determined flow rate of argon from the source 30 or nitrogen from the source 31 to the lance 1 by opening / closing the valves 21 resp. 22 and by adequately controlling the flow regulator 11.
  • the regulator 11 essentially consists of a pressure sensor 19, a pressure variation sensor 18 and a temperature sensor 20 connected respectively to converters 17 , 16 and 15 which transform the signals picked up into electrical signals which can be processed by the computer 14.
  • the latter determines according to the operating mode of the crucible or the state of blockage of the conduits the required flow rate which it transmits to the regulating valve 12 via the amplifier 13. Note that for reasons of clarity of the figure the computer has been drawn in several different places (provided with the references 14a and 14b).
  • valves 24 at 26 are located between valve 22 and the nitrogen source 31 as well as a pressure regulator 25 which prevents the source 31 from applying excessive pressures to the purge gas supply circuit 8.
  • a one-way valve 53 avoids any feedback from the carbonaceous material supply circuit 7 to the purge gas supply circuit 8.
  • the circuit 7 supplying carbonaceous material is only connected to the nitrogen source 31 and essentially comprises a flow regulator 11a as well as a blast airlock with a cellular metering device 40.
  • the airlock allows the flow rate of the mixture to be adjusted continuously. to be introduced and this by simply acting on the speed of rotation of the wheel of the cellular metering device 48.
  • the flow rate of carrier gas passing through the blowing lance can thus be modified independently of the quantity of solid material.
  • the airlock includes a conduit 41 leading to the pressurization system of the carbonaceous material reservoir 47, as well as conduits 42 to 46 connected to the fluidization system of the carbonaceous material.
  • a sensor 50 monitors the pressure in the conduits downstream of the airlock 40 and acts via the converter 49 and the computer 14b on the speed of rotation of the rove of the cellular metering device 48.
  • the flow regulator 11 a of the supplier circuit carbonaceous material 7 is of a design close to that of the regulator 11 controlling the flow of sweeping gas and the elements fulfilling equivalent functions are identified by the same numbers increased by the letter a. Note that the pressure prevailing in the duct is identified using the sensor 19a mounted on the pressure regulator 25a and the valves 24a and 26a and practically indicates the pressure of the nitrogen source 31.
  • the installation also includes several manometers 51 as well as electromagnetic valves 52.
  • the valve 9 is open while the valve 10 is closed.
  • the carrier gas flow rate as well as that of carbonaceous material are adjusted to the maximum values compatible with the capacities of the installation (source, conduits, airlock, etc.) and metallurgical requirements (capacity for absorbing carbon by the bath, etc.).
  • the pressure detected by the sensor 50 increases and the computer 14 commands a reduction in the speed of rotation of the wheel of the metering device 48 so as to reduce the load of solid material in the gas flow. If the pressure then drops, the speed of rotation of the wheel 48 is again increased.
  • the computer 14 controls the stopping of the circuit 7, the closing of the valve 9 and the opening of the valve 10. Then the regulating valve 12 is opened to the maximum so as to send, depending on the opening or closing of the valves 21 and 22, nitrogen or argon under high pressure on the shears 5 and the lance 1. If the unblocking desired operation takes place, the pressure measured by the sensor 50 drops and recarburation can resume.
  • valve 9 is closed and the valve 10 open and allows a small flow of gas (nitrogen, preferably argon) to flow through the shears 5 and the lance 1 so as to prevent blockage of the conduits due has an agglomeration of carbonaceous material deposited in the tubes or a blockage of the lance head caused by projections.
  • gas nitrogen, preferably argon

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Endoscopes (AREA)
  • Discharge Heating (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Color Printing (AREA)
  • Luminescent Compositions (AREA)
  • Inorganic Insulating Materials (AREA)
  • Physical Vapour Deposition (AREA)
  • Glass Compositions (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Coating Apparatus (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP83630175A 1982-10-27 1983-10-20 Système de réglage de l'alimentation en matières solides d'une lance de soufflage Expired EP0110806B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83630175T ATE32351T1 (de) 1982-10-27 1983-10-20 Regelungssystem zur versorgung einer blaslanze mit festen stoffen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84444 1982-10-27
LU84444A LU84444A1 (fr) 1982-10-27 1982-10-27 Systeme de reglage de l'alimentation en matieres solides d'une lance de soufflage

Publications (2)

Publication Number Publication Date
EP0110806A1 EP0110806A1 (fr) 1984-06-13
EP0110806B1 true EP0110806B1 (fr) 1988-02-03

Family

ID=19729972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630175A Expired EP0110806B1 (fr) 1982-10-27 1983-10-20 Système de réglage de l'alimentation en matières solides d'une lance de soufflage

Country Status (16)

Country Link
US (1) US4519587A (pt)
EP (1) EP0110806B1 (pt)
JP (1) JPS59133315A (pt)
KR (1) KR840006371A (pt)
AT (1) ATE32351T1 (pt)
AU (2) AU558520B2 (pt)
BR (1) BR8305162A (pt)
CA (1) CA1210833A (pt)
DE (1) DE3375583D1 (pt)
ES (1) ES8407570A1 (pt)
FI (1) FI73463C (pt)
IN (1) IN160933B (pt)
LU (1) LU84444A1 (pt)
NO (1) NO833910L (pt)
PT (1) PT77554B (pt)
ZA (1) ZA837907B (pt)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU85363A1 (fr) * 1984-05-15 1986-01-29 Arbed Dispositif d'adaptation pour tuyere d'acceleration de particules solides
US4747584A (en) * 1987-05-19 1988-05-31 Inland Steel Company Apparatus for injecting alloying ingredient into molten metal stream
US6976489B2 (en) 2000-06-30 2005-12-20 Northgate Technologies, Inc. Method and apparatus for humidification and warming of air
AUPR817201A0 (en) * 2001-10-09 2001-11-01 Technological Resources Pty Limited Supplying solid feed materials for a direct smelting process
US6835229B2 (en) 2002-01-22 2004-12-28 Isg Technologies Inc. Method and apparatus for clearing a powder accumulation in a powder delivery tube
DE602005026355D1 (de) * 2004-10-12 2011-03-31 Tech Resources Pty Ltd Bereitstellen von festen Ausgangsmaterialien für ein direktes Schmelzverfahren
US8211052B1 (en) 2006-07-13 2012-07-03 Lexion Medical Llc Charged hydrator
US8496412B2 (en) * 2006-12-15 2013-07-30 General Electric Company System and method for eliminating process gas leak in a solids delivery system
UA99576C2 (en) * 2009-04-24 2012-08-27 Флсмидт А/С Burner
JP5585517B2 (ja) * 2011-04-07 2014-09-10 新日鐵住金株式会社 溶鋼に粉体を吹込む精錬設備、粉体吹込みタンクのリーク検知方法及びプログラム
JP6019565B2 (ja) * 2011-11-16 2016-11-02 株式会社Ihi 酸素燃焼ボイラの微粉燃料供給方法及び酸素燃焼ボイラシステム
US10018419B2 (en) * 2013-05-06 2018-07-10 Tata Steel Limited Solids injection lance
CN112981036A (zh) * 2019-12-17 2021-06-18 新疆八一钢铁股份有限公司 一种快速处理转炉加料口堵塞的方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1608619B1 (de) * 1959-04-29 1969-09-11 Polysius Ag Vorrichtung zum Zufuehren von feinkoernigen oder pulverfoermigen Stoffen mittels eines Traegergases auf die Oberflaeche von Metallschmelzen
AT225213B (de) * 1960-05-27 1963-01-10 Oesterr Alpine Montan Verfahren und Einrichtung zur Einbringung von Zusatzstoffen in kohlenstoffhaltige Eisenbäder
DE2316768B2 (de) * 1973-04-04 1977-03-03 Fried. Krupp Gmbh, 4300 Essen Verfahren zum frischen von metallen, insbesondere roheisen, und vorrichtung zur durchfuehrung des verfahrens
US3891196A (en) * 1974-01-21 1975-06-24 Thyssen Niederrhein Ag Apparatus for treating a melt
US4045213A (en) * 1974-11-28 1977-08-30 Creusot-Loire Method of injecting a powder containing carbon into a metal bath
FR2459835A1 (fr) * 1979-06-27 1981-01-16 Sueddeutsche Kalkstickstoff Procede de traitement de fontes liquides permettant d'accroitre la proportion de riblons dans le convertisseur
US4264059A (en) * 1980-03-12 1981-04-28 Victor Benatar Condition responsive control means for use in discharging powdered reagent into a pool of molten metal
LU82336A1 (fr) * 1980-04-04 1980-07-02 Wurth Anciens Ets Paul Procede et dispositif de pression et de fluidisation d'une masse pulverulente dans une enceinte de distribution
US4286774A (en) * 1980-04-22 1981-09-01 Victor Benatar System for automatically injecting a measured quantity of powdered reagent into a pool of molten metal
BE893659A (fr) * 1982-06-25 1982-10-18 Centre Rech Metallurgique Procede et dispositif pour l'elaboration d'acier dans un convertisseur

Also Published As

Publication number Publication date
KR840006371A (ko) 1984-11-29
ES526779A0 (es) 1984-09-16
NO833910L (no) 1984-04-30
FI833858A (fi) 1984-04-28
FI73463C (fi) 1987-10-09
JPS59133315A (ja) 1984-07-31
AU558520B2 (en) 1987-01-29
AU2066783A (en) 1984-05-03
LU84444A1 (fr) 1984-05-10
US4519587A (en) 1985-05-28
FI833858A0 (fi) 1983-10-21
DE3375583D1 (en) 1988-03-10
CA1210833A (fr) 1986-09-02
ATE32351T1 (de) 1988-02-15
AU2081783A (en) 1984-05-03
PT77554B (fr) 1986-03-12
IN160933B (pt) 1987-08-15
ES8407570A1 (es) 1984-09-16
EP0110806A1 (fr) 1984-06-13
BR8305162A (pt) 1984-05-02
ZA837907B (en) 1984-06-27
FI73463B (fi) 1987-06-30
PT77554A (fr) 1983-11-01

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