US3630353A - Method for separation of fines from hot broken sinter - Google Patents

Method for separation of fines from hot broken sinter Download PDF

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Publication number
US3630353A
US3630353A US810628A US3630353DA US3630353A US 3630353 A US3630353 A US 3630353A US 810628 A US810628 A US 810628A US 3630353D A US3630353D A US 3630353DA US 3630353 A US3630353 A US 3630353A
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US
United States
Prior art keywords
sinter
fines
air
precipitator
blast
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 - Lifetime
Application number
US810628A
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English (en)
Inventor
Horst Seidel
Fred Cappel
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.)
Dravo Corp
Original Assignee
Dravo Corp
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
Priority claimed from DE19681758081 external-priority patent/DE1758081C3/de
Application filed by Dravo Corp filed Critical Dravo Corp
Application granted granted Critical
Publication of US3630353A publication Critical patent/US3630353A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/26—Cooling of roasted, sintered, or agglomerated ores

Definitions

  • the invention is directed to the removal of granular fines or dust from broken sinter cake, before delivery thereof to a blast furnace, by subjecting the broken cake, during passage from the sinter breakers to the cooling area, to a pressurized upward blast of air which carries the sinter fines through an exhaust hood and suitable conveyor conduit into a precipitator which removes the fines for return to the sinter machine and discharges the air to the atmosphere.
  • the invention is concerned with the sintering of metallic ore fines for processing in a conventional blast furnace in the manufacture of steel.
  • the invention is concerned with the processing of iron ore fines for reduction in a blast furnace by agglomerating the ore fines by the known process of sintering the ore fines and fuel to form sinter cakes.
  • the sinter cakes are discharged from the sintering line and broken into smaller sizes by known methods. During the breaking of the sinter cakes many fines are produced and are mixed with the larger size pieces of sinter. The charge such a mixture into a blast furnace would result in air pollution due to the blast air blowing said fines into the atmosphere, with consequent loss of valuable ore.
  • One object of the invention is to provide a suitable pressurized blast of cooling air through the broken sinter cake as it moves off the sinter feed line and through a conventional rotating sinter cooler, by collecting such blast air above said cooler and passing it through a suitable precipitator which returns the sinter fines to the sintering machine for reuse and discharges the excess air to the atmosphere.
  • Another object of the invention is to provide means for enclosing a portion of a rotating sinter cooling means with a suitable exhaust hood connected with a suitable precipitator and passing a blast of air under pressure through the cooling broken sinter moving beneath said hood to remove the fines therefrom and discharge such fines into a suitable precipitator.
  • the collected fines are discharged from the bottom of the precipitator and the excess dust free air within the precipitator is withdrawn from adjacent the top of the precipitator by a suitable exhaust fan for discharge to the atmosphere.
  • a further object of the invention is to form the sinter cooling means as a rotating annular member which receives the crushed sinter cake from the sinter feed line and passing same through vertical pressurized air blast to remove the fines therefrom and discharge them into the precipitator.
  • FIG. I shows a side elevation of the apparatus of the invention
  • FIG. 2 shows a plan view of the apparatus.
  • a generally circular U-shaped rotating cooler 1 having a perforated bottom wall.
  • Beneath cooler perforated bottom wall in close spaced relation thereto, for a length of about one-fifth of the periphery thereof, there is mounted a suitable wind box or pressure chamber 3 having connected thereto an air pressure pump 4.
  • the air stream from pump 4 and pressure chamber 3 flows vertically upward through the perforated bottom wall of the rotating cooler l and the broken sinter thereon.
  • the fine granular portions of the sinter cake layer are carried upwardly by the air stream into an overlying exhaust hood 5 and through conduit 6 connected therewith, into a suitable precipitator 8.
  • An exhaust fan 7 withdraws air from the top portion of the precipitator 8 through a conduit 9 and the precipitated sinter fines are withdrawn from precipitator 8 through the bottom thereof for return to the sintering mechanism (not shown), for reuse in forming sinter cakes.
  • the pressure at which air from pump 4 is supplied to wind box 3 may be varied in accordance with the depth of the layer of sinter upon the sinter cooler 1.
  • Such air pressure may vary between 4 to 32 inches water column pressure, preferably l6 to 24 inches water column pressure will sufiice to remove substantially all of the granular fines of 0 to 14 mesh from the sinter.
  • the following table illustrates the comparative pressures of the air stream at the pressure pump and at the sinter layer for varying depth of sinter upon the rotating cooler.
  • a method for dry classification of crushed hot sinter as received from a conventional sintering machine comprising the steps of:

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  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US810628A 1968-03-30 1969-03-26 Method for separation of fines from hot broken sinter Expired - Lifetime US3630353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681758081 DE1758081C3 (de) 1968-03-30 Klassierung von Sinter

Publications (1)

Publication Number Publication Date
US3630353A true US3630353A (en) 1971-12-28

Family

ID=5694846

Family Applications (1)

Application Number Title Priority Date Filing Date
US810628A Expired - Lifetime US3630353A (en) 1968-03-30 1969-03-26 Method for separation of fines from hot broken sinter

Country Status (8)

Country Link
US (1) US3630353A (de)
AT (1) AT285483B (de)
BE (1) BE730728A (de)
FR (1) FR2005151A1 (de)
GB (1) GB1207106A (de)
LU (1) LU58285A1 (de)
NL (1) NL6904786A (de)
SE (1) SE348825B (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831747A (en) * 1972-06-02 1974-08-27 Huber Corp J M Fluidized bed processing of carbon black
US3909189A (en) * 1971-08-25 1975-09-30 Mcdowell Wellman Eng Co Process for conditioning sinter draft for electrostatic precipitation of particulate material therefrom
US4310417A (en) * 1979-07-31 1982-01-12 Reclamet, Inc. Air inlet material separator for chip centrifuge
US4944247A (en) * 1986-03-07 1990-07-31 Aluminum Company Of America Animal litter
US5106487A (en) * 1989-07-26 1992-04-21 Inter-Source Recovery Systems, Inc. Parts separator device for separating heavy materials from chips and lubricants
US6352573B2 (en) 2000-03-21 2002-03-05 Midrex International B.V. Rotterdam Method for the separation and recycling of hot fines in hot briquetting of reduced iron
US20030099752A1 (en) * 2001-10-19 2003-05-29 The Procter & Gamble Co. Liquid coffee concentrates
US9968944B2 (en) 2013-03-15 2018-05-15 Inter-Source Recovery Systems Parts separator
US10195470B2 (en) 2013-03-15 2019-02-05 Oy Halton Group Ltd. Water spray fume cleansing with demand-based operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19501830A1 (de) * 1995-01-21 1996-07-25 Abb Management Ag Verfahren zum Aufbereiten von Schlacke aus Müllverbrennungsanlagen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874484A (en) * 1956-11-09 1959-02-24 Wolverine Equipment Co Apparatus for thermally treating articles
US3161485A (en) * 1957-12-20 1964-12-15 Fischer Ag Georg Sand cooling plant
US3309787A (en) * 1963-04-03 1967-03-21 Vickers Armstrongs Ltd Grate coolers
US3313534A (en) * 1965-07-21 1967-04-11 Allis Chalmers Mfg Co Method and furnace for heat treating minerals
US3374998A (en) * 1963-06-26 1968-03-26 Stirling Sintering Company Sinter breaker and roll crusher
US3381948A (en) * 1965-02-11 1968-05-07 Stirling Sintering Company Apparatus for the reclamation of fine material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874484A (en) * 1956-11-09 1959-02-24 Wolverine Equipment Co Apparatus for thermally treating articles
US3161485A (en) * 1957-12-20 1964-12-15 Fischer Ag Georg Sand cooling plant
US3309787A (en) * 1963-04-03 1967-03-21 Vickers Armstrongs Ltd Grate coolers
US3374998A (en) * 1963-06-26 1968-03-26 Stirling Sintering Company Sinter breaker and roll crusher
US3381948A (en) * 1965-02-11 1968-05-07 Stirling Sintering Company Apparatus for the reclamation of fine material
US3313534A (en) * 1965-07-21 1967-04-11 Allis Chalmers Mfg Co Method and furnace for heat treating minerals

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909189A (en) * 1971-08-25 1975-09-30 Mcdowell Wellman Eng Co Process for conditioning sinter draft for electrostatic precipitation of particulate material therefrom
US3831747A (en) * 1972-06-02 1974-08-27 Huber Corp J M Fluidized bed processing of carbon black
US4310417A (en) * 1979-07-31 1982-01-12 Reclamet, Inc. Air inlet material separator for chip centrifuge
US4944247A (en) * 1986-03-07 1990-07-31 Aluminum Company Of America Animal litter
US5106487A (en) * 1989-07-26 1992-04-21 Inter-Source Recovery Systems, Inc. Parts separator device for separating heavy materials from chips and lubricants
US6352573B2 (en) 2000-03-21 2002-03-05 Midrex International B.V. Rotterdam Method for the separation and recycling of hot fines in hot briquetting of reduced iron
US20030099752A1 (en) * 2001-10-19 2003-05-29 The Procter & Gamble Co. Liquid coffee concentrates
US9968944B2 (en) 2013-03-15 2018-05-15 Inter-Source Recovery Systems Parts separator
US10195470B2 (en) 2013-03-15 2019-02-05 Oy Halton Group Ltd. Water spray fume cleansing with demand-based operation

Also Published As

Publication number Publication date
NL6904786A (de) 1969-10-02
SE348825B (de) 1972-09-11
GB1207106A (en) 1970-09-30
BE730728A (de) 1969-09-01
FR2005151A1 (de) 1969-12-05
AT285483B (de) 1970-10-27
LU58285A1 (de) 1969-07-15

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