EP0125198A1 - Vorrichtung zur Beschleunigung fester Teilchen - Google Patents

Vorrichtung zur Beschleunigung fester Teilchen Download PDF

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Publication number
EP0125198A1
EP0125198A1 EP84630036A EP84630036A EP0125198A1 EP 0125198 A1 EP0125198 A1 EP 0125198A1 EP 84630036 A EP84630036 A EP 84630036A EP 84630036 A EP84630036 A EP 84630036A EP 0125198 A1 EP0125198 A1 EP 0125198A1
Authority
EP
European Patent Office
Prior art keywords
lance
gas
conduit
mouth
section
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
EP84630036A
Other languages
English (en)
French (fr)
Other versions
EP0125198B1 (de
Inventor
François Schleimer
Clement Burton
André Bock
Jean Peckels
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 AT84630036T priority Critical patent/ATE32526T1/de
Publication of EP0125198A1 publication Critical patent/EP0125198A1/de
Application granted granted Critical
Publication of EP0125198B1 publication Critical patent/EP0125198B1/de
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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0025—Adding carbon material
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • 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 for accelerating solid particles via a gas.
  • Such devices can in particular be used to recarburize steel baths in the process of refining.
  • the consumption of scrap metal per ton of liquid pig iron is commonly around 300 kg when converting lean pig iron and around 400 kg for phosphorous pig iron.
  • these addition rates must be exceeded.
  • One of the known methods consists in increasing the post-combustion rate of the CO emerging from the bath, while ensuring that the bath absorbs a maximum of the released heat. Another method is to heat the metal bath using additional energy sources. Techniques for adding gas and liquid fuel have been used with various successes.
  • the Applicant has described in its patent application LU 84,444 a system for supplying solids with a blowing lance used to supply a metal bath with fuel.
  • the installation used comprises at least one source of compressed gas, a circuit supplying carbonaceous material in suspension in a gas, at least one circuit supplying sweeping gas, means for metering the different flow rates of gas and carbonaceous material and means for separately or jointly connecting said circuits to a conduit leading to the lance.
  • the length of the ducts depends on the location of the cellular metering device and the lance-carrying carriage.
  • the lance heads just like the lance-carrying carriages do not allow certain diameters of the conduits to be exceeded for reasons of sizing resp. weight.
  • the object of the invention is to propose an acceleration device which solves the problems set out above and which is on the one hand capable to supply r at its outlet with a jet of concentrated granulated material, having a speed as high as possible and which on the other hand is capable of being easily integrated into existing installations.
  • the device according to the invention which is characterized in that the angle made by the axis of the conduit or the lance with a tangent, being in a plane passing through the axis of the conduit or the lance, the internal profile of the duct or lance varies over at least 5 m along the duct or lance.
  • the angle made by the axis of the conduit or the lance with a tangent being in a plane passing through the axis of the conduit or the lance, the internal profile of the duct or lance varies over at least 5 m along the duct or lance.
  • the idea underlying the invention stems from tests carried out on lances of various dimensions, fed by gas pressures and various gas / solid particle mixtures and tending to adjust the decrease in gas pressure in the duct. so as to have a maximum speed of the particles at the outlet of the conduit.
  • the forces causing the acceleration of the solid particles depend on the relative speed between the carrier gas and the particles; the solid particles can reach at most a speed equal to that of the gas.
  • the gas and particle velocities are respectively 85 m / s and 70 m / s after a travel distance of some 50 m - for a total length of pipe of 90 m (coal flow rate 300 kg / min) the gas and particle speeds are respectively 80 m / s and 65 m / s after a distance of 80 m.
  • the convergent was not chosen at a constant but variable angle of convergence so that the pressure drop Pl of the gas was practically monotonic from the entry of the gas into the convergent until its exit from the divergent, any pressure jump resulting in turbulence in the flow.
  • the angle made by the profile A10 with the axis of the conduit starts from a maximum negative value, decreases continuously, goes through zero and then increases continuously.
  • the length of the conduit upstream of the convergent contributes only slightly to the acceleration of the particles, which acquire practically all their speed V1 over the last twenty meters before the mouth.
  • the increase in the speed of the gas is no longer quasi-exponential and that the speed of the particles tends towards a plateau worth some 190 m / s.
  • the applicant adjusts the speed of the particles by means of a specific profile of the duct, the length of the latter being of importance. secondary. Acceptable particle velocities have for example been observed by reducing the duct having a variable section up to a length of 5 m. Below this value the results are no longer convincing.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Catalysts (AREA)
  • Saccharide Compounds (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Disintegrating Or Milling (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Steroid Compounds (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP84630036A 1983-03-11 1984-03-08 Vorrichtung zur Beschleunigung fester Teilchen Expired EP0125198B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84630036T ATE32526T1 (de) 1983-03-11 1984-03-08 Vorrichtung zur beschleunigung fester teilchen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU84686A LU84686A1 (fr) 1983-03-11 1983-03-11 Dispositif d'acceleration de particules solides
LU84686 1983-03-11

Publications (2)

Publication Number Publication Date
EP0125198A1 true EP0125198A1 (de) 1984-11-14
EP0125198B1 EP0125198B1 (de) 1988-02-17

Family

ID=19730048

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84630036A Expired EP0125198B1 (de) 1983-03-11 1984-03-08 Vorrichtung zur Beschleunigung fester Teilchen

Country Status (16)

Country Link
US (1) US4603810A (de)
EP (1) EP0125198B1 (de)
JP (1) JPS59177311A (de)
KR (1) KR840007898A (de)
AT (1) ATE32526T1 (de)
AU (1) AU566789B2 (de)
BR (1) BR8401037A (de)
CA (1) CA1234488A (de)
DE (1) DE3469371D1 (de)
ES (1) ES8600416A1 (de)
FI (1) FI74735C (de)
IN (1) IN162131B (de)
LU (1) LU84686A1 (de)
NO (1) NO840915L (de)
PT (1) PT78225B (de)
ZA (1) ZA841306B (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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1272662A (en) * 1985-03-26 1990-08-14 Canon Kabushiki Kaisha Apparatus and process for controlling flow of fine particles
CA1272661A (en) * 1985-05-11 1990-08-14 Yuji Chiba Reaction apparatus
JP2512449B2 (ja) * 1986-10-21 1996-07-03 協和醗酵工業株式会社 粉粒体の高濃度気力輸送方法及びその装置
US5199762A (en) * 1991-12-02 1993-04-06 Scheele Rick L Square-backed vehicle air foil system
US5520331A (en) * 1994-09-19 1996-05-28 The United States Of America As Represented By The Secretary Of The Navy Liquid atomizing nozzle
US6571736B2 (en) 2001-02-22 2003-06-03 Lance H. Patterson Feeder for moist fish feed
US7475831B2 (en) * 2004-01-23 2009-01-13 Delphi Technologies, Inc. Modified high efficiency kinetic spray nozzle
EP2969417A4 (de) 2013-03-15 2016-10-26 Vanmark Equipment Llc Hydroschneidesystem mit konstanter beschleunigung
US9290159B1 (en) * 2014-04-04 2016-03-22 See Ii Corporation Air foil systems and methods
GB201509585D0 (en) * 2015-06-03 2015-07-15 Bripco Bvba -
GB201511070D0 (en) 2015-06-23 2015-08-05 Bripco Bvba Data centre cooling system
AU2018206411A1 (en) * 2017-01-06 2019-08-15 Fenix Advanced Technologies, Limited Transportable combustible gaseous suspension of solid fuel particles
CN107952194A (zh) * 2017-12-18 2018-04-24 山东宏达科技集团有限公司 一种以液氮为喷射动力的多功能消防车及混合喷射炮

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1202754A (fr) * 1958-04-25 1960-01-13 Arbed Dispositif pour l'injection de produits pulvérulents ou granulés dans un bain métallique
GB911545A (en) * 1958-03-03 1962-11-28 Siderurgie Fse Inst Rech An arrangement for imparting a high velocity to particles suspended in a gas
DE1433539A1 (de) * 1963-10-19 1968-11-28 Gutehoffnungshuette Sterkrade Verfahren und Blasrohr zum Frischen einer Metallschmelze,insbesondere von Roheisen
FR2240293A1 (de) * 1973-08-08 1975-03-07 Italsider Spa
EP0081448B1 (de) * 1981-12-04 1986-09-10 Arbed S.A. Verfahren und Vorrichtung zum Raffinieren eines Metallbades, das feste Kühlmittel enthält

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE571082A (de) *
US871208A (en) * 1906-04-16 1907-11-19 Alfred Cotton Jet-blower.
US2175160A (en) * 1935-07-02 1939-10-03 Linde Air Prod Co Nozzle for cutting blowpipes
US2310265A (en) * 1939-09-18 1943-02-09 Robert P Sweeny Pneumatic conveying apparatus
US4038786A (en) * 1974-09-27 1977-08-02 Lockheed Aircraft Corporation Sandblasting with pellets of material capable of sublimation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB911545A (en) * 1958-03-03 1962-11-28 Siderurgie Fse Inst Rech An arrangement for imparting a high velocity to particles suspended in a gas
FR1202754A (fr) * 1958-04-25 1960-01-13 Arbed Dispositif pour l'injection de produits pulvérulents ou granulés dans un bain métallique
DE1433539A1 (de) * 1963-10-19 1968-11-28 Gutehoffnungshuette Sterkrade Verfahren und Blasrohr zum Frischen einer Metallschmelze,insbesondere von Roheisen
FR2240293A1 (de) * 1973-08-08 1975-03-07 Italsider Spa
EP0081448B1 (de) * 1981-12-04 1986-09-10 Arbed S.A. Verfahren und Vorrichtung zum Raffinieren eines Metallbades, das feste Kühlmittel enthält

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
PT78225A (fr) 1984-04-01
US4603810A (en) 1986-08-05
IN162131B (de) 1988-04-02
ES530476A0 (es) 1985-10-01
KR840007898A (ko) 1984-12-11
AU566789B2 (en) 1987-10-29
ES8600416A1 (es) 1985-10-01
NO840915L (no) 1984-09-12
BR8401037A (pt) 1984-10-16
DE3469371D1 (en) 1988-03-24
LU84686A1 (fr) 1984-11-14
PT78225B (fr) 1986-04-23
FI840840A (fi) 1984-09-12
ZA841306B (en) 1984-09-26
CA1234488A (fr) 1988-03-29
FI74735C (fi) 1988-03-10
AU2544984A (en) 1984-09-13
EP0125198B1 (de) 1988-02-17
FI74735B (fi) 1987-11-30
FI840840A0 (fi) 1984-03-02
JPS59177311A (ja) 1984-10-08
ATE32526T1 (de) 1988-03-15

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