EP2601319B1 - Distribution chute - Google Patents

Distribution chute Download PDF

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Publication number
EP2601319B1
EP2601319B1 EP11732496.2A EP11732496A EP2601319B1 EP 2601319 B1 EP2601319 B1 EP 2601319B1 EP 11732496 A EP11732496 A EP 11732496A EP 2601319 B1 EP2601319 B1 EP 2601319B1
Authority
EP
European Patent Office
Prior art keywords
chute
channel
distribution chute
distribution
outlet
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.)
Not-in-force
Application number
EP11732496.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2601319A1 (en
Inventor
Emile Lonardi
Guy Thillen
Dominique Rocchi
Serge Devillet
Claude Thinnes
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.)
Paul Wurth SA
Original Assignee
Paul Wurth 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 Paul Wurth SA filed Critical Paul Wurth SA
Priority to PL11732496T priority Critical patent/PL2601319T3/pl
Publication of EP2601319A1 publication Critical patent/EP2601319A1/en
Application granted granted Critical
Publication of EP2601319B1 publication Critical patent/EP2601319B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • 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
    • F27B1/20—Arrangements of devices for charging
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/10—Charging directly from hoppers or shoots
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • F27D2003/0006—Particulate materials
    • F27D2003/0007—Circular distribution
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D2003/0001—Positioning the charge
    • F27D2003/0006—Particulate materials
    • F27D2003/0008—Longitudinal distribution

Definitions

  • the present invention generally relates to distribution chutes to be used in a bulk material distribution device for distributing bulk material in an enclosure such as a metallurgical reactor and, in particular, a blast furnace. More specifically, the invention relates to a distribution chute that has a chute body defining a channel with a bent portion that diverts bulk material from a first flow direction, along which it flows immediately after impact on the chute in an inlet portion thereof, to a second flow direction with which the flow leaves the chute outlet.
  • charging installations of the so-called "bell-less” type have found widespread use.
  • These charging installations are arranged at the furnace top and comprise a distribution device and have a distribution chute as a key component.
  • the distribution device is typically configured for rotating the chute about the vertical furnace axis and for pivoting the chute about a perpendicular horizontal axis.
  • bulk charge falls vertically onto the distribution chute that distributes the material in circumferential and radial direction according to its rotational and pivotal position. Accordingly, virtually any desired charge material profile can be achieved on the charging surface.
  • Distribution chute bodies that define a channel with a bent portion that diverts the flow from a first flow direction immediately after impact on the chute to a less steep second flow direction at the outlet said flow are known for instance from Japanese patent applications JP 59-020412 and JP 59-031807 .
  • JP 59-020412 proposes a generally trough-shaped chute body with a downstream portion that is generally straight ( Fig.2 : A-B) and an upstream portion ( Fig.2 : C-B) that is curved to an arcuate shape having a center of curvature at a radius of 0.5-4.0 times, more preferably 0.5-3.0 times the chute length. Accordingly, the flow of charge material changes its direction gradually along the curved shape of the chute. Manufacturing of such a curved shape is however uneconomical or likely to result in a relatively weak construction.
  • JP 59-031807 proposes a very similar design.
  • This trough-shaped chute body merely differs in that the upstream portion is formed of a succession of straight segments, which contact tangentially with an arc having a radius of 0.5-4.0 times the chute length. Accordingly, the segments proposed in JP 59-031807 approximate the aforementioned curved shape of JP 59-020412 whilst being likely more economical in terms of manufacturing.
  • WO 2009/037508 Another chute body with a downstream portion that is less steep than the upstream portion is proposed in WO 2009/037508 .
  • the latter chute has a generally frusto-conical construction and is specifically suited for a so-called gimbal-type charging device, in which the chute pivots in cardanic manner about two perpendicular horizontal axes. Besides being incompatible with rotary and pivotal charging devices, this chute is held to be subject to more rapid wear on impact point.
  • the invention proposes a distribution chute of the rotate-and-pivot type. It may be used in a bulk material distribution device, in particular for a charge material distribution device of a metallurgical reactor such as, e.g., a shaft furnace.
  • the distribution chute comprises a chute body (i.e. the load-supporting structure of the distribution chute) having therein a channel with an inlet for receiving a flow of bulk material and an outlet for discharging the bulk material.
  • the channel conveys the bulk material from the inlet to the outlet.
  • the channel has a bend to divert the flow of material from a first flow direction in the inlet into a second flow direction in the outlet.
  • the chute body is assembled of at least an upstream part, which comprises the inlet, and a downstream part, which comprises the outlet and which is fixed to the upstream part (i.e. the upstream and downstream parts are secured against relative displacement).
  • the downstream part defines a straight portion of the channel, whereas the upstream part defines the inlet and the bend of the channel.
  • the upstream part is thick-walled with respect to the (more thin-walled) downstream part.
  • the major part of the load exerted on the distribution chute by the impacting bulk material is taken by the thick-walled upstream part of the chute body.
  • the upstream part of the chute also comprises the bend, most of the deflecting forces needed to change the trajectory of the bulk material at the transition between the first and the second flow direction are also exerted by the upstream part.
  • the material follows an essentially rectilinear trajectory (in the reference system of the chute). Consequently, the wall strength of the downstream part has been chosen smaller than that of the upstream part.
  • the result is a distribution chute, which exhibits high mechanical rigidity, which imparts less torque on the chute bearings thanks to the construction of the radially outward downstream part, and which is manufacturable economically.
  • the first flow direction corresponds to the overall tangential direction (in the vertical central plane of the distribution chute) of the bottom of the inlet, where the flow of bulk material hits the distribution chute - at least for high discharge angles, i.e. above about 45°-, whereas the second flow direction corresponds to the overall tangential direction (in the vertical central plane of the distribution chute) of the bottom of the outlet.
  • discharge angle designates the angle between the distribution chute outlet and the vertical direction.
  • the upstream part is made of cast metal, e.g. cast iron or cast steel.
  • cast metal e.g. cast iron or cast steel.
  • the downstream part comprises one or more welded curved steel plates.
  • the inlet of the channel of the distribution chute is preferably provided on the upstream part as an annular collar.
  • the inlet is thus formed as a tubular section (which encloses the axis of the inlet circumferentially).
  • the annular collar reinforces the upstream part, allowing it to take up higher torque without significant deformation.
  • the downstream part comprises a tubular section that provides the outlet. As those skilled will appreciate, this reduces (or eliminates) lateral overflow of the bulk material, which ultimately results in an improved control of the charge distribution underneath the chute. Most preferably, the downstream part tapers from the coupling with the upstream part towards the outlet.
  • the channel has a first channel axis (corresponding to the first flow direction) in the inlet and a second channel axis (corresponding to the second flow direction) in the outlet, between which the bend in the upstream part defines an angle.
  • This angle is preferably in the range from 15 to 45°, more preferably in the range from 20 to 40°.
  • the bend in the upstream part may be sharp (abrupt).
  • the bend may define a curved transition between the channel bottoms in the inlet and the outlet. It will be appreciated that three-dimensionally curved surfaces can easily be achieved using casting techniques for the manufacturing of the upstream part.
  • the upstream part comprises a coupling end opposite the inlet (with respect to the bend).
  • the downstream part is preferably inserted into the coupling end, e.g. up to the bend, and fixed in that position using screws, bolts, rivets, weldings or any other suitable fixation means.
  • the length of the overlap of the coupling end and the downstream part preferably amounts to at least 20%, e.g. between 20 and 40%, of the total length of the downstream part.
  • the distribution chute comprises an insert in the upstream part and/or in the downstream part, which insert comprises retention chambers (stone boxes), which are open to the channel so as to be able to fill up with bulk material for protection of the distribution chute against wear.
  • the inserts are arranged in such a way that any surface on which the entering flow of bulk material may impinge at an angle of at least about 30° is protected with a stone box. This way, one ensures that the regions on the channel surface that are most susceptible of being eroded by the impacting material flow are appropriately protected. It will be appreciated that the insert(s) may be exchanged separately from the chute body when they are worn. This helps to keep servicing costs low.
  • inserts in the form of retention chambers it is also possible to provide inserts in the form of cast or ceramic wear plates.
  • the outlet of the distribution chute is formed by a wear-resistant slide insert within the downstream part.
  • the slide has an essentially smooth surface in the outlet in order to discharge an as concentrated and homogeneous stream of bulk material as possible.
  • the chute body preferably has an opening on the interior side of the bend. Advantages of such an opening are, for instance, a reduction of the weight of the chute without compromising wear-resistance and the removal of an "obstacle" to the incoming flow of bulk material when the chute is oriented substantially vertical (i.e. when the discharge angle is less than about 15°) for center-charging.
  • the distribution chute may comprise handling trunnions on the upstream part, on which the distribution chute may be supported by a tilting mechanism.
  • the handling trunnions are preferably integrally formed with the upstream part.
  • a preferred aspect of the invention concerns a metallurgical reactor, e.g. a shaft furnace, comprising a charging installation with a charge material distribution device equipped with a distribution chute as described herein.
  • a distribution chute 10 according to a preferred embodiment of the invention is generally shown in Fig. 1 .
  • the distribution chute 10 comprises a chute body 12, which is essentially composed of two structural parts: cast-steel upstream part 14 and downstream part 16, which is made from curved steel plates.
  • the distribution chute 10 may be suspended to a charging device with trunnions 18 that are integrally formed with the upstream part 14, on the outside of the inlet 20 thereof.
  • the inlet 20 is configured as a (circumferentially closed) tubular channel portion.
  • the end opposite the inlet of the upstream part 14 is configured as a coupling portion, to which the downstream part is fixed.
  • the upstream and downstream parts 14, 16 delimit in their interior a channel 22 that conveys bulk material entering the distribution chute 10 through the inlet 20 to the outlet 24, from which the material is then discharged, e.g. into the charging zone of a shaft furnace.
  • Fig. 2 shows a shaft furnace charging device equipped with the distribution chute of Fig. 1 .
  • the distribution chute 10 is pivotally suspended with its trunnions 18 to a rotatable structure 25.
  • the rotatable structure 25 is rotatably supported in a stationary housing 30 by means of large diameter roller bearings 32.
  • the inner race of roller bearings 32 is fixed to a top end flange 34 of the rotatable structure 25 whereas the outer race of roller bearings 32 is fixed to a top plate 36 of the stationary housing 30.
  • the roller bearings 32 are configured so that the rotatable structure 25 and therewith the distribution chute 10 can rotate about the substantially vertical axis 38, which usually coincides with the central axis of the furnace.
  • a central feeder spout 26 is centered on axis 38 and defines a passage for bulk material through the top plate 36.
  • the charging device of Fig. 2 achieves distribution of charge material in the charging zone of the shaft furnace by rotating the distribution chute 10 about axis 38 and by varying the pivoting angle of the distribution chute 10 about pivot axis 39.
  • Pivot axis 39 is generally perpendicular to axis 38. Details of mechanisms suitable for rotating and pivoting the distribution chute 10 are not shown in the figures and not further described herein. Those interested in such mechanisms may e.g. refer to US 3,880,302 .
  • Material hitting the channel bottom in the inlet 20 is first diverted into a first flow direction substantially parallel to the bottom of the inlet.
  • the material is then diverted into a second flow direction parallel to the bottom of the outlet 24.
  • the bend 28 defines an angle ⁇ in the range from 20 to 40° between the channel bottom of the inlet and the channel bottom of the outlet.
  • the downstream part 16 and the upstream part 14 are fixed to one another at the coupling portion 40 of the upstream part 14.
  • the coupling portion 40 is located opposite the inlet 20 with respect to the bend 28.
  • the upper end of the downstream part 16 is inserted into the coupling portion 40 up to the bend 28 and fixed in that position.
  • the length of the overlap of the coupling portion 40 and the downstream part 16 amounts to about one third of the total length of the downstream part 16.
  • the distribution chute 10 comprises a first insert 42 that defines retention chambers in the upstream part 14 and a second insert 44 that defines retention chambers in the downstream part 16.
  • the retention chambers are open to the channel so as to be able to fill up with bulk material and thus to protect the distribution chute against wear.
  • the inserts are arranged in the regions that are most susceptible to erosion by the impacting bulk material.
  • Each insert 42, 44 includes a plurality of transverse plates 46 that are inclined in a direction generally opposite to the flow of the bulk material.
  • One or more longitudinal plates 48 subdivide the retaining chambers in the transversal direction of the channel in order to ensure a more uniform filling of the retaining chambers in the lateral regions of the chute 10. Further details on possible configurations of the retention chambers can e.g. be found in EP 0 640 539 .
  • the outlet 24 of the distribution chute 10 is formed by a wear-resistant slide insert 50 arranged within the downstream part 16.
  • the slide insert 50 forms an essentially smooth and slightly tapering channel portion in the outlet in order to discharge an as concentrated and homogeneous stream of bulk material as possible.
  • the surface formed by the slide insert is essentially aligned with the top edges of the transversal plates 46 and the longitudinal plates downstream of the bend 28.
  • the slope of the outlet determines the discharge angle ⁇ , which may be varied between about 10° (center-charging position) and about 50° by pivoting the chute about the pivot axis 39.
  • the chute body 12 has an opening 52 on the interior side of the bend 28.
  • the opening 52 is arranged so as to define a recess that allows increasing the inclination angle of the chute 10 without touching the radially inner edge 54 of the bottom end flange of the rotatable structure 25.
  • Another advantage of the opening 52 is that in the "center-charging" position, the bulk material may fall straight through the chute 10 without substantial deflection at the bend 28 by the roof of the channel 22. Furthermore, the opening could even serve as an overflow in certain situations.
  • the bend in the upstream part corresponds to a sharp transition between essentially straight channel portions.
  • the bend could also be implemented as a smoothly curved transition between the channel bottoms in the inlet and the outlet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chutes (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP11732496.2A 2010-08-06 2011-07-18 Distribution chute Not-in-force EP2601319B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11732496T PL2601319T3 (pl) 2010-08-06 2011-07-18 Rozprowadzająca rynna zsypowa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU91716A LU91716B1 (en) 2010-08-06 2010-08-06 Distribution chute
PCT/EP2011/062282 WO2012016818A1 (en) 2010-08-06 2011-07-18 Distribution chute

Publications (2)

Publication Number Publication Date
EP2601319A1 EP2601319A1 (en) 2013-06-12
EP2601319B1 true EP2601319B1 (en) 2014-06-18

Family

ID=42648283

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11732496.2A Not-in-force EP2601319B1 (en) 2010-08-06 2011-07-18 Distribution chute

Country Status (11)

Country Link
EP (1) EP2601319B1 (ja)
JP (1) JP5764658B2 (ja)
KR (1) KR101773454B1 (ja)
CN (1) CN103052721B (ja)
BR (1) BR112013002927A2 (ja)
LU (1) LU91716B1 (ja)
PL (1) PL2601319T3 (ja)
RU (1) RU2570258C2 (ja)
TW (1) TWI571516B (ja)
UA (1) UA107026C2 (ja)
WO (1) WO2012016818A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101443791B1 (ko) * 2013-06-26 2014-09-23 주식회사 포스코 원료 공급 장치
CA2943376C (en) * 2014-04-03 2022-06-14 Medizinische Hochschule Hannover Nebulization of immunoglobulin
LU92494B1 (fr) * 2014-07-07 2016-01-08 Wurth Paul Sa Dispositif de blocage de la goulotte sur les extrémités des tourillons, dans une installation de chargement d'un four à cuve
KR102305816B1 (ko) * 2017-02-15 2021-09-28 주식회사 포스코 원료 공급장치 및 이의 제작방법
CN110274464B (zh) * 2019-07-11 2024-02-23 重庆赛迪热工环保工程技术有限公司 一种环形受料装置及其布料方法
CN216473295U (zh) * 2021-11-08 2022-05-10 湖南德尚源耐磨工业有限公司 大高炉扁平出口布料溜槽

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Publication number Priority date Publication date Assignee Title
LU65537A1 (ja) 1972-06-16 1972-10-25
FR2230246A5 (en) 1973-05-16 1974-12-13 Delattre Levivier Rotating chute charger for blast or shaft furnaces - with all working parts sealed in annular chamber for protection against hot gas and dust
LU80630A1 (fr) * 1978-12-08 1979-04-09 Wurth Anciens Ets Paul Procede et installation de chargement d'un four a cuve
JPS5920412A (ja) 1982-07-23 1984-02-02 Nippon Steel Corp ベルレス炉頂装入装置の炉内旋回シユ−ト
JPS5931807A (ja) * 1982-08-13 1984-02-21 Nippon Steel Corp ベルレス炉頂装入装置の炉内旋回シユ−ト
JPS6378050U (ja) * 1986-11-12 1988-05-24
JPH0111717Y2 (ja) * 1987-05-15 1989-04-06
JPH065403Y2 (ja) * 1988-07-11 1994-02-09 新日本製鐵株式会社 ベルレス高炉の炉内旋回シュート
DE9422425U1 (de) * 1993-08-25 2002-01-24 Wurth Paul Sa Verteilerschurre für Schüttgut
LU88396A1 (de) * 1993-08-25 1995-03-01 Wurth Paul Sa Verteilerschurre fuer Schuettgut
LU88494A1 (fr) * 1994-06-08 1996-02-01 Wurth Paul Sa Dispositif de chargement à goulotte rotative pour un four à cuve
JPH1046220A (ja) * 1996-08-02 1998-02-17 Sumitomo Metal Ind Ltd 高炉の分配シュート
LU90319B1 (fr) * 1998-11-16 2000-07-18 Wurth Paul Sa Dispositif de r-partition de mati-res en vrac avec goulotte tournante - angle d'inclinaison variable
ATE226260T1 (de) * 1998-12-30 2002-11-15 Sms Demag Ag Gichtverschluss für schachtöfen
JP3975692B2 (ja) * 2001-06-08 2007-09-12 Ｊｆｅスチール株式会社 高炉用ベルレス式炉頂装入装置の分配シュート構造
LU91176B1 (en) 2005-06-15 2006-12-18 Wurth Paul Sa Charging device and distribution chute for a shaftfurnace
EP1870651A1 (en) * 2006-06-21 2007-12-26 Paul Wurth S.A. Charging device for a shaft furnace
GB2452917A (en) * 2007-09-19 2009-03-25 Siemens Vai Metals Tech Ltd Curved Blast Furnace Chute
CN201232066Y (zh) * 2008-07-29 2009-05-06 湖南华菱湘潭钢铁有限公司 高炉布料溜槽
CN101581541B (zh) * 2009-06-17 2011-01-05 中冶赛迪工程技术股份有限公司 一种长寿布料溜槽
CN201463592U (zh) * 2009-06-17 2010-05-12 中冶赛迪工程技术股份有限公司 一种布料溜槽衬板
CN201413040Y (zh) * 2009-06-17 2010-02-24 中冶赛迪工程技术股份有限公司 一种布料溜槽
JP6005403B2 (ja) * 2012-05-29 2016-10-12 株式会社東芝 系統安定化装置及び系統安定化装置の制御方法

Also Published As

Publication number Publication date
BR112013002927A2 (pt) 2016-06-07
JP5764658B2 (ja) 2015-08-19
TW201211266A (en) 2012-03-16
TWI571516B (zh) 2017-02-21
PL2601319T3 (pl) 2014-11-28
LU91716B1 (en) 2012-02-07
JP2013532775A (ja) 2013-08-19
CN103052721B (zh) 2014-06-04
KR101773454B1 (ko) 2017-08-31
CN103052721A (zh) 2013-04-17
UA107026C2 (uk) 2014-11-10
RU2570258C2 (ru) 2015-12-10
EP2601319A1 (en) 2013-06-12
WO2012016818A1 (en) 2012-02-09
KR20130137605A (ko) 2013-12-17
RU2013109733A (ru) 2014-09-20

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