EP0110806A1 - Regelungssystem zur Versorgung einer Blaslanze mit festen Stoffen - Google Patents

Regelungssystem zur Versorgung einer Blaslanze mit festen Stoffen Download PDF

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Publication number
EP0110806A1
EP0110806A1 EP83630175A EP83630175A EP0110806A1 EP 0110806 A1 EP0110806 A1 EP 0110806A1 EP 83630175 A EP83630175 A EP 83630175A EP 83630175 A EP83630175 A EP 83630175A EP 0110806 A1 EP0110806 A1 EP 0110806A1
Authority
EP
European Patent Office
Prior art keywords
gas
lance
pressure
circuit
carbonaceous material
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.)
Granted
Application number
EP83630175A
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English (en)
French (fr)
Other versions
EP0110806B1 (de
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/de
Application granted granted Critical
Publication of EP0110806B1 publication Critical patent/EP0110806B1/de
Expired legal-status Critical Current

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    • 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 system 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 system, 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 that 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 propose a system capable of rapidly injecting a high quantity of granulated combustible material into a metal bath from above.
  • the adjustment system which comprises at least one source of compressed gas, a circuit supplying carbonaceous material suspended in a gas, at least one circuit supplying sweeping gas, means for metering the different gas and carbonaceous material flow rates and means for separately or jointly connecting said circuits to a conduit leading to the lance.
  • 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, as described for example in patent application LU 84.176, or else a monoflux lance used to inject only granulated material in 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 case of breaking the sensor records a Variati - one pressure it transmits to the safety device 6 which stops the blowing operation.
  • 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 respective electromagnetic valves 9 ment 10.
  • the circuit-8 is used to send a determined flow 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 that can be processed by the computer 14. The latter determines, depending on 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 by means of the amplifier 13. Note that for reasons of clarity, the calculator figure has been drawn in several different places (provided with the references 14a and 14b).
  • valves 24 and 26 are located between the valve 22 and the nitrogen source 31 as well as a pressure regulator 25 which prevents the source 31 from applying pressures. excessive to the purge gas supply circuit 8.
  • a one-way valve 53 prevents any feedback from the carbon 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 continuously varied. introduce 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 matter.
  • 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 cellular metering device 48.
  • the flow regulator lIa of the circuit supplying carbonaceous material 7 is of a conception close to that of the regula 11 controlling the flow of sweeping gas and the elements performing 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 upstream of 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.
  • 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 clogging of the conduits due to an agglomeration of carbonaceous material deposited in the tubes or 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)
  • Air Transport Of Granular Materials (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Luminescent Compositions (AREA)
  • Color Printing (AREA)
  • Endoscopes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Discharge Heating (AREA)
  • Inorganic Insulating Materials (AREA)
  • Physical Vapour Deposition (AREA)
  • Glass Compositions (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Coating Apparatus (AREA)
EP83630175A 1982-10-27 1983-10-20 Regelungssystem zur Versorgung einer Blaslanze mit festen Stoffen Expired EP0110806B1 (de)

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
LU84444A LU84444A1 (fr) 1982-10-27 1982-10-27 Systeme de reglage de l'alimentation en matieres solides d'une lance de soufflage
LU84444 1982-10-27

Publications (2)

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

Family

ID=19729972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83630175A Expired EP0110806B1 (de) 1982-10-27 1983-10-20 Regelungssystem zur Versorgung einer Blaslanze mit festen Stoffen

Country Status (16)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165198A2 (de) * 1984-05-15 1985-12-18 Arbed S.A. Lanze zur Beschleunigung fester Teilchen

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
MXPA05010927A (es) * 2004-10-12 2006-04-24 Tech Resources Pty Ltd Suministro de materiales de alimentacion solidos para proceso de fusion directa.
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
CN102803849A (zh) * 2009-04-24 2012-11-28 Fl史密斯公司 燃烧器
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
JP6462666B2 (ja) * 2013-05-06 2019-01-30 タタ スチール リミテッド 固形物注入ランス
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT225213B (de) * 1960-05-27 1963-01-10 Oesterr Alpine Montan Verfahren und Einrichtung zur Einbringung von Zusatzstoffen in kohlenstoffhaltige Eisenbäder
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
FR2224546A1 (de) * 1973-04-04 1974-10-31 Krupp Gmbh
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
BE893659A (fr) * 1982-06-25 1982-10-18 Centre Rech Metallurgique Procede et dispositif pour l'elaboration d'acier dans un convertisseur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3891196A (en) * 1974-01-21 1975-06-24 Thyssen Niederrhein Ag Apparatus for treating a melt
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

Patent Citations (6)

* 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
FR2224546A1 (de) * 1973-04-04 1974-10-31 Krupp Gmbh
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
BE893659A (fr) * 1982-06-25 1982-10-18 Centre Rech Metallurgique Procede et dispositif pour l'elaboration d'acier dans un convertisseur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165198A2 (de) * 1984-05-15 1985-12-18 Arbed S.A. Lanze zur Beschleunigung fester Teilchen
EP0165198A3 (en) * 1984-05-15 1987-03-18 Arbed S.A. Lance for accelerating solid particles

Also Published As

Publication number Publication date
ES526779A0 (es) 1984-09-16
EP0110806B1 (de) 1988-02-03
FI833858A (fi) 1984-04-28
NO833910L (no) 1984-04-30
IN160933B (de) 1987-08-15
US4519587A (en) 1985-05-28
PT77554B (fr) 1986-03-12
AU2066783A (en) 1984-05-03
FI833858A0 (fi) 1983-10-21
ATE32351T1 (de) 1988-02-15
FI73463C (fi) 1987-10-09
KR840006371A (ko) 1984-11-29
AU558520B2 (en) 1987-01-29
ZA837907B (en) 1984-06-27
AU2081783A (en) 1984-05-03
DE3375583D1 (en) 1988-03-10
JPS59133315A (ja) 1984-07-31
ES8407570A1 (es) 1984-09-16
FI73463B (fi) 1987-06-30
CA1210833A (fr) 1986-09-02
LU84444A1 (fr) 1984-05-10
BR8305162A (pt) 1984-05-02
PT77554A (fr) 1983-11-01

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