EP2955236A1 - Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau - Google Patents

Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau Download PDF

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Publication number
EP2955236A1
EP2955236A1 EP14172352.8A EP14172352A EP2955236A1 EP 2955236 A1 EP2955236 A1 EP 2955236A1 EP 14172352 A EP14172352 A EP 14172352A EP 2955236 A1 EP2955236 A1 EP 2955236A1
Authority
EP
European Patent Office
Prior art keywords
raw material
blast furnace
chute
filling level
locally
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.)
Withdrawn
Application number
EP14172352.8A
Other languages
German (de)
English (en)
Inventor
Paul Fischer
Martin LEHOFER
Andreas ROHRHOFER
Michael WEINZINGER
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.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to EP14172352.8A priority Critical patent/EP2955236A1/fr
Publication of EP2955236A1 publication Critical patent/EP2955236A1/fr
Withdrawn legal-status Critical Current

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    • 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 specially adapted for 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices
    • 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
    • F27D2003/105—Charging directly from hoppers or shoots using shutters

Definitions

  • the invention relates to a method for controlling the filling level of a raw material in a blast furnace, wherein the blast furnace has a feed area for further raw material comprising a chute system, wherein the chute system comprises a chute rotating about a vertical axis, which comprises an annular application of the further raw material to the in the Blast furnace already existing raw material produced, and wherein the chute system comprises a raw material flow flap, which causes a function of a flap position a constant inflow of additional raw material to the blast furnace.
  • the invention further relates to a control system for a balancing system of a blast furnace, the metering system comprising a chute system with a chute rotationally driven about a vertical axis for annularly charging further raw material to raw material already present in the blast furnace, the chute further comprising a raw material flow flap with adjustable Flap position includes, and wherein at least one unit for determining a locally present level of the raw material in the blast furnace is present.
  • the invention further relates to an aerating system for a blast furnace, comprising a chute system having a chute rotating about a vertical axis for annularly depositing further raw material on raw material already present in the blast furnace, the chute further comprising a raw material flow flap with adjustable flap position, and wherein at least one unit for determining the locally present filling level of the raw material in the blast furnace is present.
  • a blast furnace with such a Belichtungsstrom.
  • German patent application no. 2 035 458 a furnishing device for a shaft furnace, in particular a blast furnace, with a chute system.
  • the DE 601 02 714 T2 describes a device for distributing bulk material as part of a Belichtungsstrom for a blast furnace.
  • the device comprises a rotatable chute with an adjustable inclination angle.
  • the upper boundary surface of the raw material, to which raw material is repeatedly fed from above via the delivery system, is - as seen from above in the direction of the longitudinal axis of the blast furnace - conceptually divided into circle segments.
  • indentations ie below-average levels of raw material in the blast furnace, form.
  • the raw material is applied in multiple layers, these layers usually having a thickness in the range of 0.2 to 0.8 m.
  • the chute alternately carries either ore, sinter or pellets or coke. Also the position the task of different materials may vary.
  • coarse coke can preferably be introduced in the middle region of the blast furnace, that is to say near the longitudinal axis of the blast furnace, while fine ores are introduced in the outer region, that is to say in regions with the largest possible distance from the longitudinal axis of the blast furnace. This procedure serves to protect an outdoor area of the blast furnace from overheating and to adjust the air resistance of the blast furnace.
  • the circular segments in which indentations are determined, specifically with raw material. If it is determined by a unit for determining a locally present level of filling of the raw material in the blast furnace that a recess with a below-average filling level of the raw material has formed in a circular segment, the chute is controlled such that it only uses the rocking material in a reciprocating motion to the affected circle segment. About the inclination angle of the chute is still controlled, at which distance from the longitudinal axis of the blast furnace, the raw material is to be deposited annularly.
  • a unit for determining a locally present filling level may be the operating personnel and / or a sensor arrangement, for example with a optical sensor, act.
  • the operation of the entire blast furnace plant including the bunker facilities for the assembly of the raw material and the transport system for the raw material in the direction of the metering system must be considered.
  • the bunkers and the Belichtungsstrom in the transport system constantly about 4 to 6 different raw material batches on the road, which differ in their material composition.
  • About 20 to 26 batches are mixed per hour.
  • not every batch is suitable for filling in a resulting indentation.
  • different batches are put together containing either ore, sinter or pellets or coke.
  • the assembly of a single suitable special batch requires separate intervention in the batch creation process and usually takes about 15 minutes.
  • the object of the invention is to provide an improved method for controlling the level of a raw material in a blast furnace. Furthermore, it is an object of the invention to provide a suitable control system.
  • the object is for the method for controlling the filling level of a raw material in a blast furnace, wherein the blast furnace has a feed area for further raw material comprising a chute system, wherein the chute system comprises a chute rotating about a vertical axis, the an annular application of the further raw material on the produced in the blast furnace already existing raw material, and wherein the chute system has a raw material flow flap, which causes a constant inflow of additional raw material to the blast furnace, depending on a flap position, achieved by an angular velocity of the rotating chute in response to a locally present level of the raw material is changed in the blast furnace.
  • the chute is therefore operated so that circular segments with indentations and below average level of raw material are passed through slower than circular segments with elevations and above average level of raw material. Due to the fact that in such a procedure, the chute longer in a circular segment with a recess remains, more raw material is stored in this circle segment and thus filled the indentation. In this case, the next available raw material batch can be used in a simple manner.
  • the control interventions to provide the required angular velocity per circle segment can be done manually or automatically.
  • the inventive method has the advantage that no special batches are required and no interruption of the normal charging operation must be made. The productivity of the blast furnace plant is maintained throughout.
  • Each raw material batch is deposited in the blast furnace all over the upper boundary of the raw material, but in different amounts.
  • the Gas josströmhus the filling and thus the temperature of the blast furnace are made uniform, so that the risk of caking of the raw material is reduced to the shell of the blast furnace.
  • an inclination angle of the chute is changed as a function of the locally present filling level of the raw material in the blast furnace.
  • indentations that are present locally and only at certain distances from the longitudinal axis of the blast furnace, can also selectively fill.
  • the angular velocity of the chute in areas of the blast furnace with locally below average filling height is preferably set lower than in areas with locally average or above-average filling level.
  • the angular velocity of the chute in areas of the blast furnace with local above-average filling level is particular is set higher than in areas with locally average or below average fill levels.
  • the Belichtungsstrom comprises a chute system with a rotatably driven about a vertical axis chute for annular application of additional raw material on existing in the blast furnace raw material, the chute system further with a raw material flow flap adjustable flap position, wherein at least one unit for determining a locally present level of filling of the raw material in the blast furnace by the control system is adapted to change an angular velocity of the rotating chute depending on the determined locally present level of the raw material in the blast furnace.
  • the control system according to the invention has the advantage that no special batches are required and no interruption of the normal charging operation must take place. The productivity of the blast furnace plant is maintained throughout.
  • the control system is preferably further configured to change a slope angle of the chute in dependence on the determined locally present filling level of the raw material in the blast furnace.
  • the regulating interventions can be used to provide the required angular velocity per circular segment and / or required tilt angle within a circle segment manually by the operator or automatically.
  • An aerator for a blast furnace comprising a chute system having a chute rotatably driven about a vertical axis for annularly charging further raw material to raw material already present in the blast furnace, the chute system further comprising a raw material flow flap with adjustable flap position, and wherein at least a unit for determining the locally present filling level of the raw material is present in the blast furnace, with furthermore a control system according to the invention.
  • a blast furnace with such a treatment plant has proved to be advantageous.
  • FIG. 1 1 shows a schematic representation of a blast furnace installation comprising a blast furnace 1, a metering installation 2, a bunker installation 3 with a plurality of material bins 4 containing different starting materials for assembling different raw material batches 9a, 9b, and a transport system 5 for transporting the raw material batches 9a, 9b from the bunker installation 3 to the treatment plant 2.
  • the blast furnace 1 has a shell 1a and a longitudinal axis 1b.
  • the metering system 2 comprises a chute system with a chute 2a, a drive 2b (not shown here in detail) (cf. FIG.
  • the drive 2b is set up, on the one hand a rotation of the chute 2a about a vertical axis, here the longitudinal axis 1b of the blast furnace 1, in an adjustable Angle velocity ⁇ effect and on the other hand to adjust an inclination angle ⁇ of the chute 2a.
  • a rotation of the chute 2a about a vertical axis, here the longitudinal axis 1b of the blast furnace 1, in an adjustable Angle velocity ⁇ effect and on the other hand to adjust an inclination angle ⁇ of the chute 2a.
  • On an upper boundary surface 9 'of the already filled into the blast furnace 1 raw material 9 2a further raw material batches 9a, 9b abandoned by means of the chute 2a.
  • the locally resulting level h of the raw material 9 in the blast furnace 1 can be detected by a unit 11, here in the form of infrared cameras, with areas of high infrared radiation as indentations 10 in the upper boundary surface 9 'with below average level h and areas with low infrared radiation Elevations in the upper boundary 9 'are rated above average level h.
  • FIG. 2 Now shows a schematic plan view of the upper boundary surface 9 'of the raw material 9 in a blast furnace 1 according to FIG. 1 in section A-A '.
  • the upper interface 9 ' is divided into circle segments K1 to K8, each one Circle segment K1 to K8 is assigned to a certain angular range at the formed by the shell 1a of the blast furnace 1 circle.
  • the angular segment K1 is assigned an angular range of 0 to 45 °
  • the circular segment K2 an angular range of 45 to 90 ° and so on.
  • the size of the angles ⁇ of the circle segments will depend essentially on the dimensions of the blast furnace 1 and the specifications of the drive 2b of the chute 2a and is therefore variable within wide limits.
  • unit 11 cf. FIG. 1
  • a recess 10 is detected, which is located in the edge region of the circle segments K4 and K5.
  • FIG. 3 shows a diagram concerning FIG. 2 with the set angular velocities ⁇ of the chute 2a at two different angles of inclination ⁇ of the chute 2a.
  • the angular velocity ⁇ (in rad / s) of the chute 2a is plotted over an angle ⁇ (in radians) in which the chute 2a is located.
  • the chute 2a is guided here on two tracks B2 and B2 (see FIG. 2 ), which result from the adjustment of the two different inclination angles ⁇ .
  • the indentation 10 see FIG.
  • FIGS. 4 to 8 now show possible driving programs for a chute 2a. Same reference numerals as in the FIGS. 1 to 3 identify similar elements.
  • four different angles of inclination ⁇ of the chute 2a are set, thereby traversing four lanes B1 to B4.
  • the angular velocity ⁇ of the chute 2a (marked with thick bars on the tracks B1 to B4) is slowed down in each case.
  • FIG. 9 shows a schematic representation of a control system 100 for the conditioning system 2 of the blast furnace 1 according to FIG. 1 .
  • a control system 100 for the conditioning system 2 of the blast furnace 1 according to FIG. 1 .
  • the radiation images acquired by means of the unit 11 in the form of an infrared camera, via which a local filling level h of the blast furnace 1 is determined, are transferred to a computing unit 101, which comprises a travel program for the chute 2a, including specifications for the angular velocity ⁇ as a function of the angle ⁇ , in which the chute 2 is located and specifications concerning an inclination angle ⁇ of the chute 2a for settingwaterfahrenden paths B1 to B x provides.
  • the calculated driving program is transmitted to a control unit 102, which in turn regulates the drive 2b of the chute 2a and a respective drive 7a of the raw material flow flaps 7, 7 'according to the driving program.
  • the task of raw material 9 achieved on the upper boundary surface 9 'due to the set flap position and the movement profile of the chute 2a with simultaneous filling of indentations 10 generates a modified radiation image which is detected again by the unit 11 and indicates a new local filling height h.
  • the radiation images can also be evaluated by the operator of the blast furnace system and the desired driving program can be manually entered into the arithmetic unit 101 via an input unit 103.
  • FIGS. 1 to 9 shown embodiments of the invention are not limited to the design of the blast furnace system or Belichtungsstrom shown here.

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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)
  • Blast Furnaces (AREA)
EP14172352.8A 2014-06-13 2014-06-13 Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau Withdrawn EP2955236A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14172352.8A EP2955236A1 (fr) 2014-06-13 2014-06-13 Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau

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Application Number Priority Date Filing Date Title
EP14172352.8A EP2955236A1 (fr) 2014-06-13 2014-06-13 Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau

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EP2955236A1 true EP2955236A1 (fr) 2015-12-16

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EP14172352.8A Withdrawn EP2955236A1 (fr) 2014-06-13 2014-06-13 Procédé et dispositif de réglage de la hauteur de remplissage d'un matériau tubulaire dans un haut-fourneau

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2035458A1 (de) 1969-07-31 1971-02-11 Wurth Anciens Ets Paul Schachtofenbegichtungsvornchtung
US3929240A (en) * 1972-07-05 1975-12-30 Wurth Anciens Ets Paul Shaft furnace charging process
NL7707178A (en) * 1977-06-29 1979-01-03 Hoogovens Ijmuiden Bv Device for determining charge distribution in blast furnace - consists of two radar antennae mounted on ball joints, a transmitter and a receiver
US4575790A (en) * 1982-07-28 1986-03-11 Paul Wurth S.A. Method and apparatus for controlling the movement of an oscillating spout
KR20010035940A (ko) * 1999-10-05 2001-05-07 이구택 고로 장입물의 레벨 편차 보상이 이루어지는 장입제어방법
DE60102714T2 (de) 2000-09-20 2005-04-07 Paul Wurth S.A. Drehbare verteilerschurre für schüttgut mit einstellbarem neigungswinkel
WO2013053329A1 (fr) * 2011-10-11 2013-04-18 Gao Zhengkai Système et procédé de mesure en ligne du niveau de charge d'un haut-fourneau

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2035458A1 (de) 1969-07-31 1971-02-11 Wurth Anciens Ets Paul Schachtofenbegichtungsvornchtung
US3929240A (en) * 1972-07-05 1975-12-30 Wurth Anciens Ets Paul Shaft furnace charging process
NL7707178A (en) * 1977-06-29 1979-01-03 Hoogovens Ijmuiden Bv Device for determining charge distribution in blast furnace - consists of two radar antennae mounted on ball joints, a transmitter and a receiver
US4575790A (en) * 1982-07-28 1986-03-11 Paul Wurth S.A. Method and apparatus for controlling the movement of an oscillating spout
KR20010035940A (ko) * 1999-10-05 2001-05-07 이구택 고로 장입물의 레벨 편차 보상이 이루어지는 장입제어방법
DE60102714T2 (de) 2000-09-20 2005-04-07 Paul Wurth S.A. Drehbare verteilerschurre für schüttgut mit einstellbarem neigungswinkel
WO2013053329A1 (fr) * 2011-10-11 2013-04-18 Gao Zhengkai Système et procédé de mesure en ligne du niveau de charge d'un haut-fourneau
EP2787087A1 (fr) * 2011-10-11 2014-10-08 Zhengkai Gao Système et procédé de mesure en ligne du niveau de charge d'un haut-fourneau

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 197903, Derwent World Patents Index; AN 1979-05427B, XP002734081 *

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