US3836131A - Apparatus for cooling a moving bed of solid, gas permeable particles - Google Patents

Apparatus for cooling a moving bed of solid, gas permeable particles Download PDF

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Publication number
US3836131A
US3836131A US00428146A US42814673A US3836131A US 3836131 A US3836131 A US 3836131A US 00428146 A US00428146 A US 00428146A US 42814673 A US42814673 A US 42814673A US 3836131 A US3836131 A US 3836131A
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US
United States
Prior art keywords
gas
cooling
unit
distributor
bed
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
US00428146A
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English (en)
Inventor
D Beggs
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.)
ZURICH BRANCH OF MIDREX INTERNATIONAL BV A NETHERLANDS Corp
Midrex Corp
MILDREX CORP
Original Assignee
MILDREX 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
Application filed by MILDREX CORP filed Critical MILDREX CORP
Priority to US00428146A priority Critical patent/US3836131A/en
Application granted granted Critical
Publication of US3836131A publication Critical patent/US3836131A/en
Priority to AU76520/74A priority patent/AU477747B2/en
Priority to GB54698/74A priority patent/GB1485429A/en
Priority to NL7416616A priority patent/NL7416616A/xx
Priority to IT30748/74A priority patent/IT1027822B/it
Priority to JP14626574A priority patent/JPS5320706B2/ja
Priority to BR10604/74A priority patent/BR7410604D0/pt
Priority to AT1013574A priority patent/AT328481B/de
Priority to NO744603A priority patent/NO139795C/no
Priority to LU71526A priority patent/LU71526A1/xx
Priority to SE7416088A priority patent/SE424914B/xx
Priority to ZA00748088A priority patent/ZA748088B/xx
Priority to IN2809/CAL/74A priority patent/IN139654B/en
Priority to FR7442045A priority patent/FR2256388B1/fr
Priority to ES433140A priority patent/ES433140A1/es
Priority to AR256989A priority patent/AR201802A1/es
Priority to BE2054037A priority patent/BE823546A/xx
Priority to DE19742461094 priority patent/DE2461094C3/de
Priority to CA216,763A priority patent/CA1019569A/en
Priority to KE3098A priority patent/KE3098A/xx
Priority to MY247/81A priority patent/MY8100247A/xx
Assigned to MIDREX CORPORATION, A DE CORP. reassignment MIDREX CORPORATION, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MIDLAND-ROSS CORPORATION,
Assigned to ZURICH BRANCH OF MIDREX INTERNATIONAL, B.V. A NETHERLANDS CORPORATION reassignment ZURICH BRANCH OF MIDREX INTERNATIONAL, B.V. A NETHERLANDS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MIDREX CORPORATION
Anticipated expiration legal-status Critical
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
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0086—Conditioning, transformation of reduced iron ores
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
    • C21B13/029—Introducing coolant gas in the shaft 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
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements
    • 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
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0286—Cooling in a vertical, e.g. annular, shaft
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein

Definitions

  • the distributor includes a plurality of tiered gas units in nested relationship with one another and arranged in progressively smaller sizes from the top of the distributor.
  • Each gas unit contains a predetermined number of peripherally spaced gas outlet ports to provide streams of cooling gas under sufficient pressure at each unit to effectively cool the bed of particles.
  • the invention is particularly applicable to vertical shaft-type furnaces which directly reduce iron oxideto metallic iron and employ a cooling leg at the lower portion thereof to cool the metallic particles and will thus be described with particular reference thereto.
  • the invention has broader applications and may be applied as a means for cooling any moving bed of gas permeable solid particles.
  • cooling leg portions may be viewed as discharge bins which converge into a throat section to assure an accurate pellet descent rate through the furnace.
  • One known arrangement simply comprised an upright, hollow cone and cooling gas was directed into the interior thereof. Such arrangement proved generally unsatisfactory because the cooling gas simply could not permeate a sufficent amount of pellets within the bed to adequately cool the bed.
  • Another possible attempt directed at providing sufficient quantities of cooling gas to the bed consisted of applying a number of cooling gas pipes in axially spaced arrangement through the wall of the converging bin.
  • This object along with other features of the subject invention is achieved by providing an especially configured gas distributor within a converging bin through which a bed of solid, gas permeable particles descends.
  • the gas distributor extends downwardly in a converging configuration within the bed and includes a predetermined plurality of gas discharge ports peripherally spaced about the distributor in arrays which are axially spaced along the length thereof.
  • the number of ports and correspondingly the net discharge area associated with each array is sized as a function of 'the array position within the bed to assure, at the least, approximately equal discharge rates of the cooling gas from each discharge port array.
  • This configuration assures that the fastest moving particles at the center of the descending bed are subjected to several streams of cooling gas as they descend past the distributor to assureef- ,fective cooling of the entire bed.
  • the converging configuration of the gas distributor comprises a plurality of successively smaller sized tiered gas units, one nested within the other.
  • Each unit comprises a continiuous side wall having a top end at which is formed an outwardly extending support flange.
  • the support flange of any given unit is positioned at a given distance within the side wall of the next larger unit immediately thereabove.
  • the bottom end of the side wall of each gas unit comprises a leading edge to define an overhanging lip which surrounds the upper side wall portion of the smaller unit positioned directly below. This leading edge prevents particles from flowing into the gas discharge ports which are spaced closely adjacent the top end of each side wall.
  • FIG. 1 is an elevated view, in section, of a vertical shaft furnace employing the cooling apparatus of the subject invention
  • FIG. 2 is a larger elevation view, in section, of the cooling apparatus shown in FIG. 1;
  • FIG. 3 is a cross-sectional view of the cooling apparatus taken along line 33 of FIG. 2.
  • FIG. 1 a refractory lined, vertical shaft furnace 10 having a cooling leg section 12 at the bottom thereof and cooling apparatus 13 disposed within cooling leg 12 for cooling a descending bed of gas permeable solid particles 14, herein defined as iron oxide pellets, lumps or sized ore.
  • Shaft furnace is equipped with a feed hopper 16 at the top thereof which is fed pellets from a source 18.
  • a pellet feed pipe 20 supplies the pellets to the reduction furnace 10 wherein a first stockline 11 is established by the angle of repose of the pellets within the furnace.
  • the bottom of furnace 10 is defined by a throat section 22 which enters into the cooling leg section 12. Spaced above throat section 22 is a bustle and tuyere arrangement 25 which receives hot reducing gas, shown as arrows 26, from a gas inlet pipe 28 which in turn is connnected to a source of reducing gas 29.
  • Reducing gas is introduced radially inwardly into the shaft furnace by a series of wall ports 30 in the bustle and tuyere arrangement 25 and the reducing gas flows vertically upward in counterflow relationship to the descending bed 14.
  • the reacted reducing gas exits from bed 14 at stockline 21 and thence through an off-take pipe 32.
  • Cooling leg 12 may be properly viewed as a discharge bin formed in part by an external wall closed about a predetermined periphery to define a coverging configuration. This converging configuration is shown herein as a frusto-conical wall portion 35 which is disposed between a circular throat portion 36 at the bottom of the cooling leg and a larger circular wall portion 37 which defines a pellet retaining area at the top of the cooling leg.
  • the gravitational rate of descent of the bed 14 of pellets within cooling leg 12, furnace 10 and feed hopper 16 is controlled by a suitable belt feeder assembly 38 positioned below cooling leg throat 36 and driven by a motor 39.
  • Cooling apparatus 13 within cooling leg 12 generally comprises a support mechanism 40 extending through and supported by frusto-conical wall 35 and in turn supporting a gas distributor 42 depending downwardly therefrom and centered on vertical centerline 43 of frusto-conical wall 35 which coincides with the centerline of cooling leg 12 anf furnace 10.
  • a pressurized cooling gas indicated by arrows 45 is directed from distributor 42 into bed 14 in a manner to be explained hereafter and leaves the bed at stockline 33 whereupon it exits from the cooling leg as a relatively hot gas through off-take pipe 46 adjacent stockline 33.
  • the heated or spent cooling gas is then cleansed and cooled in a suitable cooler-scrubber 47 and pressurized in a compressor 49 before being introduced into the cooling apparatus 13 to define a closed loop cooling circuit.
  • support mechanism 40 is shown to comprise a bustle 50 circumferentially extending about frusto-conical wall portion 35 and a central discharge unit 52 positioned at the geometric center of bustle 50.
  • Central discharge unit 52 is supported by four diamond shaped feed pipes 53 which are spaced 90 apart from one another and extend radially inwardly towards the center of bustle 50 and through frusto-conical wall portion 35 which in turn supports the entire support mechanism 40.
  • central discharge unit is defined by a frusto-conical side wall 55 which is open at its bottom end 56 and closed at its top end by a top wall 57. Cooling gas enters bustle 50 through suitable connections (not shown) and exits from the bustle through feed pipes 53 into central discharge unit 52 and exits from the bottom thereof into gas distributor 42.
  • gas distributor 42 extends downwardly into cooling leg 12 in a coverging configuration characterized by a predetermined number of peripherally spaced gas discharge ports 60 arranged in axially spaced arrays 61 along the. distributor length. More particularly, each port array 61 is contained within a gas discharge unit 63. Each discharge port 60 is shown herein to be equally sized and the number of ports which constitutes a given arry 61 defines a net discharge area for that array. It is desirable for optimum cooling results that the net discharge area progressively increase for arrays progressively spaced from the top of gas distributor 42. As a matter of practice, the size of gas distributor 42 may limit the net discharge area of the lowest arrays in which case it is desirable to maintain the area of such arrays as nearly equal to that of the higher arrays as possible.
  • gas discharge units 63 Structurally, gas discharge units 63, and specifically identified as 63a to 63f with corresponding parts identified by like subscripts where applicable, are nested one within another and extend in a tiered arrangement which becomes progressively smaller in size from the top unit 63a to the bottom gas unit 63f.
  • Each gas unit 63 is shown to comprise a peripherally extending open ended sidewall 67. At the top of each side wall an outwardly extending support flange 68 is formed.
  • Each support flange 68 of each gas unit 63 is positioned within and secured to the side wall 67 of that gas unit immediately thereabove.
  • each gas unit thus extends below the support flange 68 of the next lower unit to define an overhanging lip 69 which circumscribes and shrouds the top portion of the side wall 67 of each gas unit.
  • Each overhanging lip 69 thus forms a stockline 70 at eachlgas unit 63 to prevent pellets from clogging distributor 42 by entering outlet ports 60 which importantly are spaced adjacent the top end of each gas outlet side wall 67 and thus shrouded by overhanging lip 69.
  • an exit path through the distributor is provided by an opening 72 in an end wall 73 at the bottom of the side wall of the smallest gas unit 63f. Opening 72 is included in the net discharge area for gas unit 63f.
  • Distributor 42 is similarly connected to central discharge unit 52 of support mechanism 40 by the support flange 68a of the largest gas unit, being nested within frusto-conical side wall 55 in a manner similar to which the other gas units 63 are connected to one another.
  • streams of cooling gas will exit from each gas outlet unit 63 to effectively cool the bed 14 of pellets as it passes downwardly by distributor 42. Cooling of the bed occurs because distributor 42 is optimized in design in accordance with geometric considerations involved in passing a moving bed of pellets through a converging area. That is known flow considerations of the pellets establish that the pellets within the bed at the centerline 43 of the cooling leg or bin 12 will be traveling the fastest of all the pellets within the bed, the pellets adjacent exterior frusto-conical wall 35 will have the slowest velocity of the pellets within the bed, and a velocity gradient will occur across the bed by which the speed of the other pellets can be determined accordingly.
  • distributor 42 introduces the cooling gas adjacent the fastest moving pellets within the bed, sucy pellets are initially impinged by the gas while high in cooling quality. As the cooling gas permeates radially-outwardly through the bed, it loses its high cooling quality but the slower moving pellets are exposed to the cooling gas for a longer period of 5 time to accordingly compensate for this loss.
  • the pressure gradient in effect is neutralized throughout the bed by the number of gas discharge ports 60 provided within each array 61 in distributor 42. More particularly, it has been found that if the net area of all discharge ports for each gas unit were at least made equal and preferably progressively larger for the smaller gas units, sufficient quantities of cooling gas would be supplied at each gas unit to effectively cool the bed of pellets as same passes by distributor 42.
  • the distributor 42 is thus characterized as being positioned along its entire length closely adjacent to the fastest moving particles within the descending bed and having pluralities of peripherally spaced discharge ports 60 arranged in axially spaced arrays 62 with each array having a net discharge area defined by its ports which is sized with respect to the other array areas to produce sufficient quantities of gas leaving each array for effective cooling of the particle bed.
  • the cooling mechanism has been shown applied to the cooling leg section of a shaft furnace for illustrative purposes only. It should be clear from the above description that the cooling mechanism may be applied to any moving bed of gas permeable solid particles heated by means other than a shaft furnace.
  • cooling means within said body for introducing a cooling gas under pressure in counterflow relationship to said descending bed, said cooling means including: a. support means extending within said wall portion and carrying said cooling gas, and b. a gas distributor secured to said support means and receiving said cooling gas therefrom, said distributor extending in a converging configuration downwardly into said body and having a predetermined number of peripherally spaced gas discharge ports arranged in axially spaced arrays along its length whereby said distributor introduces said cooling gas to said particles at predetermined flows along its length.
  • the total area of said discharge ports in any given array is sized as a function of bed pressure adjacent said given array.
  • said downwardly extending converging configuration of said distributor is defined by a plurality of successively smaller sized tiered gas discharge units, each discharge unit nested within an adjacent gas unit spaced vertically thereabove and each unit containing an array of said predetermined number of peripherally spaced gas discharge ports. 4.
  • each gas unit includes a side wall having a top and bottom end, a support flange extending outwardly from said top end and said plurality of discharge ports positioned adjacent said top end; and said support flange of each unit positioned within said side wall of an adjacent unit, each side wall of each unit extending downwardly beyond each support flange of an adjacent unit thus positioned to define an overhanging lip shrouding said ports of a gas unit immediately therebelow.
  • the smallest in size gas unit has an end wall extending from said bottom of said side wall thereof, said bottom wall having a gas discharge port extending therethrough.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Manufacture Of Iron (AREA)
US00428146A 1973-12-26 1973-12-26 Apparatus for cooling a moving bed of solid, gas permeable particles Expired - Lifetime US3836131A (en)

Priority Applications (21)

Application Number Priority Date Filing Date Title
US00428146A US3836131A (en) 1973-12-26 1973-12-26 Apparatus for cooling a moving bed of solid, gas permeable particles
AU76520/74A AU477747B2 (en) 1973-12-26 1974-12-17 Apparatus for cooling a moving bed of solid, gas permeable particles
GB54698/74A GB1485429A (en) 1973-12-26 1974-12-18 Apparatus for cooling a moving bed of solid gas permeable particles
BE2054037A BE823546A (fr) 1973-12-26 1974-12-19 Appareil pour le refroidissement d'un lit mouvant de particules solides, permeables aux gaz.
ZA00748088A ZA748088B (en) 1973-12-26 1974-12-19 Apparatus for cooling a moving bed of solid, gas permeable particles
ES433140A ES433140A1 (es) 1973-12-26 1974-12-19 Perfeccionamientos en aparatos para enfriar lechos perme- ables a los gases de particulas solidas descendentes.
JP14626574A JPS5320706B2 (pt) 1973-12-26 1974-12-19
BR10604/74A BR7410604D0 (pt) 1973-12-26 1974-12-19 Aparelho para resfriamento de um leito permeavel a gas de particulas solidas
AT1013574A AT328481B (de) 1973-12-26 1974-12-19 Kuhlvorrichtung zur kuhlung eines sich bewegenden gasdurchlassigen bettes von festen partikeln
NO744603A NO139795C (no) 1973-12-26 1974-12-19 Apparatur for kjoeling av et bevegelig sjikt av faste, gassgjennomtrengelige partikler
LU71526A LU71526A1 (pt) 1973-12-26 1974-12-19
SE7416088A SE424914B (sv) 1973-12-26 1974-12-19 Apparat for kylning av gaspermeabel bedd av nedsjunkande fasta partiklar exempelvis vertikal schaktugn for reduktion av jernoxid
NL7416616A NL7416616A (nl) 1973-12-26 1974-12-19 Inrichting voor het koelen van een bewegend bed met vaste, gas doorlatende delen.
IN2809/CAL/74A IN139654B (pt) 1973-12-26 1974-12-19
FR7442045A FR2256388B1 (pt) 1973-12-26 1974-12-19
IT30748/74A IT1027822B (it) 1973-12-26 1974-12-19 Apparecchio per il raffreddamento di on letto mobile di granuli solidi permeabili ai gas
AR256989A AR201802A1 (es) 1973-12-26 1974-12-19 Aparato para enfriar un lecho permeable al gas de particulas solidas descendentes
DE19742461094 DE2461094C3 (de) 1973-12-26 1974-12-23 Abkühlvorrichtung für ein gasdurchlässiges Bett absinkender Feststoffteilchen
CA216,763A CA1019569A (en) 1973-12-26 1974-12-24 Apparatus for cooling a moving bed of solid, gas permeable particles
KE3098A KE3098A (en) 1973-12-26 1980-10-22 Apparatus for cooling a moving bed of solid gas permeable particles
MY247/81A MY8100247A (en) 1973-12-26 1981-12-30 Apparatus for cooling a moving bed of solid gas permeable particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00428146A US3836131A (en) 1973-12-26 1973-12-26 Apparatus for cooling a moving bed of solid, gas permeable particles

Publications (1)

Publication Number Publication Date
US3836131A true US3836131A (en) 1974-09-17

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US00428146A Expired - Lifetime US3836131A (en) 1973-12-26 1973-12-26 Apparatus for cooling a moving bed of solid, gas permeable particles

Country Status (19)

Country Link
US (1) US3836131A (pt)
JP (1) JPS5320706B2 (pt)
AR (1) AR201802A1 (pt)
AT (1) AT328481B (pt)
BE (1) BE823546A (pt)
BR (1) BR7410604D0 (pt)
CA (1) CA1019569A (pt)
ES (1) ES433140A1 (pt)
FR (1) FR2256388B1 (pt)
GB (1) GB1485429A (pt)
IN (1) IN139654B (pt)
IT (1) IT1027822B (pt)
KE (1) KE3098A (pt)
LU (1) LU71526A1 (pt)
MY (1) MY8100247A (pt)
NL (1) NL7416616A (pt)
NO (1) NO139795C (pt)
SE (1) SE424914B (pt)
ZA (1) ZA748088B (pt)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118017A (en) * 1976-01-02 1978-10-03 United States Steel Corporation Shaft furnace design
FR2417073A1 (fr) * 1978-02-08 1979-09-07 Metallgesellschaft Ag Procede et installation pour refroidir des poussieres ou des grains fins
US4188022A (en) * 1978-09-08 1980-02-12 Midrex Corporation Hot discharge direct reduction furnace
US4205831A (en) * 1979-04-04 1980-06-03 Hylsa, S. A. Ore reduction reactor discharge regulator
US4221366A (en) * 1979-01-23 1980-09-09 Hylsa, S.A. Gas distributing closure plug for metallurgical reactor
US4256290A (en) * 1979-10-15 1981-03-17 Pullman Incorporated Bottom cooling arrangement for reduction apparatus
US4290587A (en) * 1979-10-04 1981-09-22 Pullman Incorporated Ore treating apparatus
US4338123A (en) * 1981-02-23 1982-07-06 Hylsa, S.A. Method and apparatus for the reduction of metal ores
US4389796A (en) * 1980-03-05 1983-06-28 Luossavaara-Kiirunavaara Aktiebolag Heat exchanger
US4470581A (en) * 1981-01-29 1984-09-11 Midrex Corporation Apparatus for selective reduction of metallic oxides
DE3441361A1 (de) * 1984-08-24 1986-03-06 SKF Steel Engineering AB, Hofors Verfahren und einrichtung zum abkuehlen von stueckigem material
US4728082A (en) * 1986-02-07 1988-03-01 Envirotech Corporation Apparatus for biological processing of metal containing ores
WO1990010602A1 (en) * 1989-03-13 1990-09-20 Envirotech Corporation Bioslurry reactor for treatment of slurries containing minerals, soils and sludges
US4968008A (en) * 1986-02-07 1990-11-06 Envirotech Corporation Bioleaching apparatus and system
US4974816A (en) * 1986-02-07 1990-12-04 Envirotech Corporation Method and apparatus for biological processing of metal-containing ores
US5007620A (en) * 1986-02-07 1991-04-16 Envirotech Corporation Apparatus for biological processing of metal-containing ores
US5437708A (en) * 1994-05-04 1995-08-01 Midrex International B.V. Rotterdam, Zurich Branch Iron carbide production in shaft furnace
US5618032A (en) * 1994-05-04 1997-04-08 Midrex International B.V. Rotterdam, Zurich Branch Shaft furnace for production of iron carbide
US6210631B1 (en) 1997-12-05 2001-04-03 Voest-Alpine Industrieanlagenbau Gmbh Reduction vessel for the reduction of metal-oxide-bearing material
CN102798285A (zh) * 2012-08-23 2012-11-28 济钢集团国际工程技术有限公司 一种氧化球团竖炉内置冷却装置
WO2014060996A1 (en) * 2012-10-18 2014-04-24 Tenova Pyromet (Proprietary) Limited Heating apparatus and gas distributor for use in the heating apparatus
CN104451140A (zh) * 2013-09-13 2015-03-25 中冶东方工程技术有限公司秦皇岛研究设计院 一种立式冷却窑
CN104862439A (zh) * 2015-05-29 2015-08-26 中冶长天国际工程有限责任公司 一种透气物料的气冷装置及方法
CN104894323A (zh) * 2015-05-29 2015-09-09 中冶长天国际工程有限责任公司 一种透气物料的气冷装置及方法
US20200318206A1 (en) * 2016-06-09 2020-10-08 Primetals Technologies Austria GmbH Method for direct reduction using vent gas
IT201900022587A1 (it) * 2019-11-29 2021-05-29 Galbiati Cristiano Fornace a camere separate
CN113720142A (zh) * 2021-08-23 2021-11-30 西安交通大学 一种换热均匀的竖冷窑

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT382391B (de) * 1984-08-17 1987-02-25 Voest Alpine Ag Schachtofen
US5702246A (en) * 1996-02-22 1997-12-30 Xera Technologies Ltd. Shaft furnace for direct reduction of oxides
JP5636881B2 (ja) * 2010-11-01 2014-12-10 宇部興産機械株式会社 竪型焼成炉

Citations (3)

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Publication number Priority date Publication date Assignee Title
US2591789A (en) * 1948-06-24 1952-04-08 Brassert & Co Apparatus for reducing metallic oxides
US3063695A (en) * 1958-09-25 1962-11-13 P M Associates Beneficiation of low-grade hematitic ore materials
US3764123A (en) * 1970-06-29 1973-10-09 Midland Ross Corp Method of and apparatus for reducing iron oxide to metallic iron

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591789A (en) * 1948-06-24 1952-04-08 Brassert & Co Apparatus for reducing metallic oxides
US3063695A (en) * 1958-09-25 1962-11-13 P M Associates Beneficiation of low-grade hematitic ore materials
US3764123A (en) * 1970-06-29 1973-10-09 Midland Ross Corp Method of and apparatus for reducing iron oxide to metallic iron

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118017A (en) * 1976-01-02 1978-10-03 United States Steel Corporation Shaft furnace design
FR2417073A1 (fr) * 1978-02-08 1979-09-07 Metallgesellschaft Ag Procede et installation pour refroidir des poussieres ou des grains fins
US4188022A (en) * 1978-09-08 1980-02-12 Midrex Corporation Hot discharge direct reduction furnace
US4221366A (en) * 1979-01-23 1980-09-09 Hylsa, S.A. Gas distributing closure plug for metallurgical reactor
US4205831A (en) * 1979-04-04 1980-06-03 Hylsa, S. A. Ore reduction reactor discharge regulator
US4290587A (en) * 1979-10-04 1981-09-22 Pullman Incorporated Ore treating apparatus
US4256290A (en) * 1979-10-15 1981-03-17 Pullman Incorporated Bottom cooling arrangement for reduction apparatus
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SE424914B (sv) 1982-08-16
JPS5320706B2 (pt) 1978-06-28
NL7416616A (nl) 1975-06-30
ZA748088B (en) 1976-01-28
AU7652074A (en) 1976-06-17
ES433140A1 (es) 1976-11-16
MY8100247A (en) 1981-12-31
IT1027822B (it) 1978-12-20
NO139795C (no) 1979-05-09
BE823546A (fr) 1975-04-16
IN139654B (pt) 1976-07-10
DE2461094B2 (de) 1976-09-30
FR2256388A1 (pt) 1975-07-25
BR7410604D0 (pt) 1975-09-02
NO139795B (no) 1979-01-29
DE2461094A1 (de) 1975-07-03
AR201802A1 (es) 1975-04-15
SE7416088L (pt) 1975-06-27
FR2256388B1 (pt) 1978-07-07
CA1019569A (en) 1977-10-25
KE3098A (en) 1981-02-13
JPS50117052A (pt) 1975-09-12
LU71526A1 (pt) 1975-06-17
NO744603L (pt) 1975-07-21
ATA1013574A (de) 1975-06-15
AT328481B (de) 1976-03-25
GB1485429A (en) 1977-09-14

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