US3794483A - Process for delivering fuel and air to a rotary reduction kiln - Google Patents

Process for delivering fuel and air to a rotary reduction kiln Download PDF

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Publication number
US3794483A
US3794483A US00302606A US3794483DA US3794483A US 3794483 A US3794483 A US 3794483A US 00302606 A US00302606 A US 00302606A US 3794483D A US3794483D A US 3794483DA US 3794483 A US3794483 A US 3794483A
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US
United States
Prior art keywords
air
kiln
fuel
nozzles
nozzle
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
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US00302606A
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English (en)
Inventor
E Rossi
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Allis Chalmers Corp
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Allis Chalmers Corp
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Filing date
Publication date
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Publication of US3794483A publication Critical patent/US3794483A/en
Assigned to CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE, WOODS KATHLEEN D., AS TRUSTEE reassignment CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
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Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices
    • F27B7/362—Introducing gas into the drum axially or through the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/36—Arrangements of air or gas supply devices
    • F27B7/362—Introducing gas into the drum axially or through the wall
    • F27B2007/367—Introducing gas into the drum axially or through the wall transversally through the wall of the drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/02—Supplying steam, vapour, gases, or liquids
    • F27D2007/026—Dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0068—Regulation involving a measured inflow of a particular gas in the enclosure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen

Definitions

  • PROCESS FOR DELIVERING FUEL AND AIR TO A ROTARY REDUCTION KILN Filed Oct. 51, 1972 2 Sheets-Sheet 2 United States Patent Office 3,794,483 Patented Feb. 26, 1974 3,794,483 PROCESS FOR DELIVERING FUEL AND AIR TO A ROTARY REDUCTION KILN
  • Eugene F. Rossi, Wauwatosa, Wis., assignorfo Allis Chalmers Corporation, Milwaukee, Wis. Filed Oct. 31, 1972, Ser. No. 302,606
  • This invention relates to rotary kilns used for such purposes as reducing iron ore to a lower state of oxidation having nozzles mounted on the outer surface of the kiln projecting radially through the kiln shell for injecting air and fuel into the kiln at axially and circumferentially spaced locations along the kiln length.
  • the invention relates to such a rotary kiln wherein the same nozzle can be utilized to alternately provide both the fuel and the air to the kiln charge.
  • An additional object of this invention is to provide a process wherein both fuel and air are admitted through the same nozzles at different points of rotation of the kiln.
  • a more specific object of the subject invention is to provide a process for reducing ore of the hereinbefore described type wherein the fuel and air are admitted through the nozzle at a speed which is greater than the speed of flame propagation of a combustible mixture of the fluid flowing throuhg the nozzle.
  • Another object of the invention is to provide a process for a rotary ore reducing kiln of the hereinbefore described type wherein the reducing fuel is admitted through a nozzle while the nozzle is beneath the ore charge and alternately air is admitted through the same nozzle while the nozzle is above the ore charge.
  • An additional object of the subject invention is to provide a rotary kiln with fluid distribution means which alternately delivers fuel or air to each nozzle at preselected points of rotation of the nozzle relative to the kiln charge.
  • a more specific object of the subject invention is to provide a rotary ore reducing kiln of the hereinbefore described type wherein valve means connect both the fuel and air to a single nozzle for selective alternate flow of both fluids through the same nozzle.
  • An additional object of the subject invention is to provide a kiln of the hereinbefore described type wherein a single valve is utilized to alternately direct either fuel or air through the same nozzle at selected points of rotation of the kiln.
  • FIG. 1 is a side elevation of a portion of a kiln constructed in accordance with the invention
  • FIG. 2 is a section taken along the lines II--II of FIG. 1 and additionally showing means for operating the fluid distribution means;
  • FIG. 3 is a cross-section of a particular type of valve showing one inlet port connected to the outlet port;
  • FIG. 4 shows the same valve as FIG. 3 with both inlet ports shut off
  • FIG. 5 shows the same valve with the other inlet port connected to the outlet port.
  • the kiln shown herein for purposes of illustration is provided with an elongated cylindrical body portion 6 which defines a cylindrical reduction or combustion chamber 7.
  • the shell or inner wall 8 of the kiln may be constructed of any suitable refractory material such as firebricks. Any well-known means may be provided for supporting and rotating the kiln. Since such means form no part of this invention and are well known in the art they are not shown herein.
  • a charge of ore generally designated 9 is shown in FIG. 2.
  • a main burner 11 is provided at the right-hand end of the kiln to preheat the kiln.
  • a plurality of circumferentially spaced and axially spaced nozzles 12 are provided about the surface of the kiln opening into the chamber 7. These nozzles may be constructed of any conventional manner and are preferably constructed in accordance with my co-pending application entitled Nozzle for Rotary Kiln. The nozzles may be supported by the outer kiln plate 13 in any conventional manner such as by welding. A plurality of circumferentially spaced fuel and air conduits 14 and 16 respectively are also supported about the surface of the kiln. Any conventional means in the form of a manifold (not shown) may be provided to deliver fuel and air to the conduits 14 and 16.
  • a fluid distribution means generally designated 17 connects the respective fuel and air conduits to the associated nozzles.
  • This fluid distribution means may comprise a plurality of valves or as shown herein for purposes of illustration may comprise a single three-way 'valve generally designated 18 and fluid transfer conduit means 19 connecting the outlet of the valve 18 to the associated nozzles 12.
  • the particular valve 18 shown herein for purposes of illustration is more clearly defined in FIGS. 3 through 5.
  • the valve consists of a valve body 20 having two opposed inlet ports 21 and 22 and a single outlet port 23.
  • a rotary plug 24 having a passageway 26 in the configuration shown is rotatably supported in the valve body and has a valve stem 27 attached thereto and extending to the exterior of the valve body.
  • the fuel from conduit 14 is delivered through the nozzles 12 while they are beneath the charge 9. Such fuel is only admitted while the nozzles are beneath the charge and air from conduit 16 is admitted through the same nozzles while they are above the charge 9. To this end means are provided to operate the valve 18 to effect this alternate delivery of fuel and air through each of the nozzles.
  • FIG. 2 A preferred relatively inexpensive mechanical operating mechanism for controlling the flow of fuel and air into the chamber 7 is shown most clearly in FIG. 2. It should be understood that while this control mechanism is perfectly acceptable other means for operating the fluid distribution means 17 could be employed such as a solenoid valve operating hydraulic or air actuators. Referring to FIG. 2 a frame generally designated 28 is provided about the kiln 6. This frame 28 is provided with four strategically located trip means 29, 31, 32 and 33.
  • Each valve shaft 27 is connected to a cam plate 34 which is supported for rotation on brackets 36 connected to the exterior of the kiln for rotation therewith.
  • Each cam plate 34 has four cams 37, 38, 39 and 41 supported about the periphery thereof. The cams are spaced substantially 90 degrees from one another and are located to engage a particular trip means when they are in the radially outermost position relative to the axis of the kiln.
  • a process for reducing a charge of ore in a rotating kiln having nozzles open to the interior of the kiln comprising the steps of:

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Manufacture Of Iron (AREA)
  • Furnace Details (AREA)
US00302606A 1972-10-31 1972-10-31 Process for delivering fuel and air to a rotary reduction kiln Expired - Lifetime US3794483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30260672A 1972-10-31 1972-10-31

Publications (1)

Publication Number Publication Date
US3794483A true US3794483A (en) 1974-02-26

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ID=23168481

Family Applications (1)

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US00302606A Expired - Lifetime US3794483A (en) 1972-10-31 1972-10-31 Process for delivering fuel and air to a rotary reduction kiln

Country Status (15)

Country Link
US (1) US3794483A (xx)
JP (1) JPS5232723B2 (xx)
AU (1) AU465274B2 (xx)
BR (1) BR7308532D0 (xx)
CA (1) CA989611A (xx)
ES (1) ES420116A1 (xx)
FR (1) FR2205182A5 (xx)
GB (1) GB1448263A (xx)
IN (1) IN140689B (xx)
IT (1) IT996352B (xx)
NL (1) NL7314873A (xx)
NO (1) NO134768C (xx)
OA (1) OA04566A (xx)
SE (1) SE402128B (xx)
ZA (1) ZA738405B (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070149A (en) * 1976-07-23 1978-01-24 Allis-Chalmers Corporation Controllable distribution system for rotary kiln
US4148601A (en) * 1976-08-06 1979-04-10 Gosudarstvenny Vsesojuzny Nauchno-Issledovatelsky Institut Tsementnoi Promyshlennosti Flexible cam system for actuating mechanisms mounted on a revolving assembly
US4208181A (en) * 1978-11-13 1980-06-17 Allis-Chalmers Corporation Liquid metering and distribution arrangement for rotary reactor
US4209292A (en) * 1978-11-13 1980-06-24 Allis-Chalmers Corporation Fluid storage and distribution arrangement mounted on rotary reactor
US4214707A (en) * 1979-07-23 1980-07-29 Allis-Chalmers Corporation Trap-port for rotary kilns
US4373909A (en) * 1981-11-23 1983-02-15 Allis-Chalmers Corporation Gas injecting kiln shell nozzle with particle entry barriers
US4373908A (en) * 1981-11-23 1983-02-15 Allis-Chalmers Corporation Kiln shell nozzle with annular fluid delivery
US4591362A (en) * 1984-04-06 1986-05-27 Phillips Petroleum Company Fluid injection method
US6221127B1 (en) 1999-11-10 2001-04-24 Svedala Industries, Inc. Method of pyroprocessing mineral ore material for reducing combustion NOx
US6474984B2 (en) 2000-11-20 2002-11-05 Metso Minerals Industries, Inc. Air injection for nitrogen oxide reduction and improved product quality
US6568653B1 (en) 2002-01-15 2003-05-27 Metso Minerals Industries, Inc. Butterfly valve actuation system for ported kiln
US20100175591A1 (en) * 2006-10-19 2010-07-15 Holcim Technology Ltd. Method for introducing waste and/or alternative fuels into a clinker production method and device for carrying out said method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH609443A5 (en) * 1976-04-15 1979-02-28 Soreb Societe Pour La Rech L E Method for forced blowing of fluids making possible physical or chemical exchanges in a mass of material in movement
FR2399722A1 (fr) * 1977-08-04 1979-03-02 Aimants Ugimag Sa Ruban composite aimante
JPS56100622U (xx) * 1979-12-28 1981-08-07

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070149A (en) * 1976-07-23 1978-01-24 Allis-Chalmers Corporation Controllable distribution system for rotary kiln
US4148601A (en) * 1976-08-06 1979-04-10 Gosudarstvenny Vsesojuzny Nauchno-Issledovatelsky Institut Tsementnoi Promyshlennosti Flexible cam system for actuating mechanisms mounted on a revolving assembly
US4208181A (en) * 1978-11-13 1980-06-17 Allis-Chalmers Corporation Liquid metering and distribution arrangement for rotary reactor
US4209292A (en) * 1978-11-13 1980-06-24 Allis-Chalmers Corporation Fluid storage and distribution arrangement mounted on rotary reactor
US4214707A (en) * 1979-07-23 1980-07-29 Allis-Chalmers Corporation Trap-port for rotary kilns
US4373909A (en) * 1981-11-23 1983-02-15 Allis-Chalmers Corporation Gas injecting kiln shell nozzle with particle entry barriers
US4373908A (en) * 1981-11-23 1983-02-15 Allis-Chalmers Corporation Kiln shell nozzle with annular fluid delivery
US4591362A (en) * 1984-04-06 1986-05-27 Phillips Petroleum Company Fluid injection method
US6221127B1 (en) 1999-11-10 2001-04-24 Svedala Industries, Inc. Method of pyroprocessing mineral ore material for reducing combustion NOx
US6474984B2 (en) 2000-11-20 2002-11-05 Metso Minerals Industries, Inc. Air injection for nitrogen oxide reduction and improved product quality
US6568653B1 (en) 2002-01-15 2003-05-27 Metso Minerals Industries, Inc. Butterfly valve actuation system for ported kiln
US20100175591A1 (en) * 2006-10-19 2010-07-15 Holcim Technology Ltd. Method for introducing waste and/or alternative fuels into a clinker production method and device for carrying out said method
US8162659B2 (en) * 2006-10-19 2012-04-24 Holcim Technology Ltd. Method for introducing waste and/or alternative fuels into a clinker production method and device for carrying out said method

Also Published As

Publication number Publication date
CA989611A (en) 1976-05-25
AU465274B2 (en) 1975-09-25
ES420116A1 (es) 1976-07-01
GB1448263A (en) 1976-09-02
DE2354604B2 (de) 1975-09-04
IN140689B (xx) 1976-12-11
FR2205182A5 (xx) 1974-05-24
JPS5232723B2 (xx) 1977-08-23
JPS4976707A (xx) 1974-07-24
BR7308532D0 (pt) 1974-08-15
ZA738405B (en) 1975-06-25
NO134768B (xx) 1976-08-30
IT996352B (it) 1975-12-10
NL7314873A (xx) 1974-05-02
AU6187173A (en) 1975-05-01
DE2354604A1 (de) 1974-05-09
OA04566A (fr) 1980-05-31
SE402128B (sv) 1978-06-19
NO134768C (xx) 1976-12-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329