EP0200996B1 - Procédé de contrôle de l'opération d'une installation de chargement d'un four à cuve et installation conçue pour la mise en oeuvre de ce procédé - Google Patents

Procédé de contrôle de l'opération d'une installation de chargement d'un four à cuve et installation conçue pour la mise en oeuvre de ce procédé Download PDF

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Publication number
EP0200996B1
EP0200996B1 EP86105642A EP86105642A EP0200996B1 EP 0200996 B1 EP0200996 B1 EP 0200996B1 EP 86105642 A EP86105642 A EP 86105642A EP 86105642 A EP86105642 A EP 86105642A EP 0200996 B1 EP0200996 B1 EP 0200996B1
Authority
EP
European Patent Office
Prior art keywords
hopper
chamber
dosing valve
discharge
carcase
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
Application number
EP86105642A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0200996A1 (fr
Inventor
Marc Solvi
Gilbert Bernard
Emile Lonardi
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
Priority claimed from LU85879A external-priority patent/LU85879A1/fr
Priority claimed from LU86340A external-priority patent/LU86340A1/fr
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Priority to AT86105642T priority Critical patent/ATE38857T1/de
Publication of EP0200996A1 publication Critical patent/EP0200996A1/fr
Application granted granted Critical
Publication of EP0200996B1 publication Critical patent/EP0200996B1/fr
Expired legal-status Critical Current

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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
    • 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
    • F27D3/10—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

Definitions

  • the present invention relates to a method for controlling the operation of a loading installation of a shaft furnace comprising a rotary or oscillating distribution chute, a hopper with a central flow opening above the chute controlled by a metering member with symmetrical action around the central axis of the furnace and surmounted by at least one airlock provided with upper and lower sealing valves, as well as a metering valve for regulating the flow towards the hopper.
  • the invention also relates to an installation for implementing this method.
  • the object of the present invention is to provide a loading method and installation which allow a vertical and symmetrical fall of the loading material.
  • the method proposed by the invention is characterized in that the material being contained in the airlock and the metering valve of the hopper being closed, the metering valve of the airlock is first opened to cause the flow of a quantity of material sufficient for the formation of a barrage of material above the flow tubing of the hopper, in that the metering flap of the latter is only opened after the formation of this barrier, in that we weigh separately and throughout the loading time both the hopper and the airlock which is in communication with the hopper, in that we generate signals representing respectively the quantity of material contained in the hopper, the quantity of material contained in the airlock and the sum of the quantities of material contained in the hopper and the airlock and in that the position of the metering valve of the hopper is adjusted so that the hopper flow rate is not greater than the flow rate d e the flow from the airlock to the hopper.
  • the invention also provides an installation for loading a shaft furnace comprising a rotary or oscillating distribution chute, a hopper with a central flow opening above the chute controlled by a metering valve with symmetrical action around the central axis of the oven and surmounted by two storage airlocks juxtaposed on either side of the vertical axis of the oven and carried by means of load cells, these airlocks being each provided with flow pipes directed towards the hopper , a pair of sealing valves and a pair of metering valves respectively associated with the flow pipes for placing the airlocks alternately in communication with the interior of the oven, characterized in that said hopper is contained in a sealed carcass in which penetrate the flow pipes, in that said hopper is suspended from the carcass by means of load cells and in that means are provided outside the carcass for weak re turn the hopper around the axis of the oven and to activate its metering valve through the central suspension of the hopper.
  • the hopper metering valve is preferably constituted by an element movable vertically and defining with the wall of the hopper an annular flow opening whose section is variable by vertical displacement of said element.
  • the hopper suspension consists of a vertical cylinder axially crossing the upper part of the carcass at a sealing bellows and carried by the load cells resting on the carcass, a hollow rod arranged coaxially in said cylinder, the lower part of this rod being connected by means of one or more crosspieces to the hopper, while its upper part undergoes, outside the carcass, the action of a drive means for rotating it around of the vertical axis of the oven and by a rod coaxially passing through said hollow rod, the lower part of this rod being connected to the metering valve, while its upper part undergoes the action of a jack outside the carcass to cause the vertical displacement of the rod and the metering flap.
  • the outer cylinder of the hopper suspension is preferably connected to the carcass by flexible horizontal stabilization elements which do not impede the freedom of vertical movement of the hopper suspension.
  • FIG. 1 shows the upper part of a blast furnace 10 in the head of which is mounted a rotary distribution chute 12 with adjustable angle of discharge. Above the oven 10 is a frame 14 which supports the installation for feeding the material
  • This installation includes, among other things, a hopper 16 whose flow opening is located above the chute 12 on the central axis O and which is controlled by a metering valve 18 composed of two registers with symmetrical action around of axis 0.
  • the frame 14 also supports one or more airlocks, only one of which is represented by the reference 20.
  • This airlock communicates with the hopper 16 through a valve cage 22 which includes a sealing valve not shown and a metering valve 24 controlling the flow of the airlock 20, similar to the valve 18.
  • the hopper 16 rests on a number of load cells 26 which make it possible to continuously supply signals representative of the weight of the hopper and of its content.
  • the airlock 20 rests on several load cells 28 making it possible to supply signals representative of the content of the airlock 20.
  • compensators 30 and 32 have been provided for both 'other of the hopper 16 to separate it from the airlock and the oven.
  • loading phase we mean the deposition of a uniform layer of weight P o on the loading surface in the oven 10.
  • all the quantity of loading material with weight P o is in the airlock 20, the metering valve 24 of which is still closed.
  • the hopper 16 which is empty is also closed by its metering valve 18.
  • valve 24 simply as a check valve and open it fully to allow the flow of material in the hopper up to when the flow stops naturally, which is shown in FIG. 1.
  • the metering is then carried out by the valve 18 and the material descends, without falling, from the airlock through the cage 22 into the hopper 16 as and as it flows from it.
  • valve 24 must be used as a metering valve to regulate the flow of the airlock 20 so as to maintain the dam in the hopper 16.
  • the curves P t and P respectively represent the weight of the content of the hopper and the weight of the content of the airlock. It shows the evolution of the weight of these contents as a function of time T.
  • the flow of the airlock 20 stops automatically when the loading material accumulates at its angle of rest in the hopper 16 through the communication between the airlock and the hopper as shown in Figure 1. This situation is detected by the evolution of the weight of the hopper 16 and the airlock 20 which no longer changes as soon as the flow stops, which is illustrated in FIG. 2 from time t, where the curves P t and P s take directions horizontal.
  • the load flows from the hopper 16 towards the interior of the oven.
  • the flow rate of the material flowing from the hopper 16 is adjusted by the valve 18 so that it is not greater than the flow rate of the flow from the airlock to the hopper 16, so that the weight of the contents of the hopper 16 remains constant as long as the loading material is still in the airlock 20.
  • This is represented by the horizontal evolution of the curve P t beyond the point t 2 .
  • the continuous descent of the curve P illustrates the progressive flow from the airlock 20 towards the hopper 16.
  • the total weight P s + P t decreases, of course, also from the moment t 2 , which is illustrated by the fact that the curve in broken lines descends parallel to the curve P s .
  • FIG. 3 shows an embodiment of an installation for implementing the method described above, and which is becoming more and more advantageous for large capacity ovens.
  • a well-known problem in loading installations with a distribution chute is that of the segregation of the particles, that is to say their separation inside an enclosure according to their particle size.
  • This phenomenon discussed in more detail in patent LU-85,810 intensifies with the increase in the diameter of the enclosure.
  • This problem is also likely to arise, more or less pronounced, in the hopper in which the dam is caused during the implementation of the method described above, in particular because of the fact that the dam is formed by growth the along the conical wall of the hopper into the upper tubing of one of the airlocks.
  • FIG. 3 we can see the upper part of a tank oven 40 in the head of which there is a distribution chute 42 actuated by a drive mechanism located in a housing 44 on the head of the oven 40.
  • a carcass watertight 46 of substantially conical shape, carried by a frame 48 supported by the head of the oven 40 is connected by its lower part by means of a compensator 50 to the housing 44 and communicates through this compensator 50 with the interior of the oven 40.
  • the carcass 46 carries, by means of several load cells 52 two airlocks 54 and 56 whose oblique flow pipes 58 and 60 penetrate inside the carcass 46.
  • the flow of these pipes 58 and 60 is controlled by metering members 62 and 64.
  • the seal between each of the airlocks 54 and 56 and the interior of the carcass 46 and the oven 40 is produced by two sealing valves 66 and 68 cooperating with seats mounted in the carcass.
  • a conical hopper 70 inside the carcass 46 is controlled by a metering valve 72 whose the aim is to cause the formation of a dam of the material in the hopper 70 as described above with reference to FIG. 1.
  • the installation includes means for rotating this hopper 70 around the vertical axis 0 of the oven 40.
  • This rotation in fact allows better filling of the hopper 70 and a filling which takes place over 360 ° rather than an embankment which climbs from the metering valve 72 to the airlocks of the airlocks 54 and 56 and which promotes the phenomenon of segregation.
  • the problem caused by the rotation of the hopper 70 is the need to be able to control the flow of the material by weighing the hopper 70, weighing which with a stationary hopper presented no problem.
  • the hopper 70 is suspended by one or more cross members 74 from a hollow rod 76 disposed on the central axis 0 and held inside an external coaxial cylinder 78 which crosses, in a sealed manner, the upper part of the carcass 46 at the level of a bellows 80.
  • This cylinder 78 rests on the outside on several load cells 82 which supply signals representing the weight of the hopper 70, of its content and of all its suspension and accessories 'training.
  • the rod 76 is connected, outside the carcass 46, to means not shown to rotate it with the hopper 70 around the central axis 0 as symbolized by the arrows A and B.
  • the metering valve 72 which regulates the flow out of the hopper 70 is designed in the form of a disc or bell which, by vertical displacement, defines an annular opening of variable section with the wall of the hopper 70.
  • the metering valve 72 is carried by the end of a rod 84 passing coaxially through the rod 76 and undergoing outside the carcass 46 the action of a jack 86 to move the metering valve 72 between the closed position illustrated in solid lines and a position open illustrated in dotted lines.
  • the cylinder 78 is connected by blades 88 to the carcass 46, these blades being flexible enough not to hinder the freedom of vertical movement of the cylinder 78, that is to say that is, to exert a harmful influence on the results of the weighing.
  • the weighing of the hopper 70 and that of the airlock in the flow phase allow the control and command of the loading, in particular the operation of the metering valve 72 by providing signals representing the content of the hopper 70 and that of one of the airlocks 54 or 56, that is to say during the weighing, the airlock in the flow phase and the hopper are considered as a single container.
  • the weighing of the hopper 70 for monitoring the level of its content.
  • the volume and the level curve of the content of the hopper may vary, it is preferable to monitor the filling level of the hopper by level detectors such as for example ultrasonic, isotope, optical probes, etc.

Landscapes

  • 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)
  • Blast Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP86105642A 1985-05-07 1986-04-23 Procédé de contrôle de l'opération d'une installation de chargement d'un four à cuve et installation conçue pour la mise en oeuvre de ce procédé Expired EP0200996B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105642T ATE38857T1 (de) 1985-05-07 1986-04-23 Verfahren zum kontrollieren der beschickungsvorrichtung eines schachtofens und beschickungsvorrichtung dafuer.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
LU85879 1985-05-07
LU85879A LU85879A1 (fr) 1985-05-07 1985-05-07 Procede de controle de l'operation d'une installation de chargement d'un four a cuve
LU86340A LU86340A1 (fr) 1986-03-04 1986-03-04 Installation de chargement d'un four a cuve
LU86340 1986-03-04

Publications (2)

Publication Number Publication Date
EP0200996A1 EP0200996A1 (fr) 1986-11-12
EP0200996B1 true EP0200996B1 (fr) 1988-11-23

Family

ID=26640310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105642A Expired EP0200996B1 (fr) 1985-05-07 1986-04-23 Procédé de contrôle de l'opération d'une installation de chargement d'un four à cuve et installation conçue pour la mise en oeuvre de ce procédé

Country Status (12)

Country Link
US (1) US4767258A (cs)
EP (1) EP0200996B1 (cs)
JP (1) JP2587919B2 (cs)
KR (1) KR930009969B1 (cs)
CN (1) CN1008939B (cs)
BR (1) BR8602182A (cs)
CA (1) CA1269832A (cs)
CS (1) CS258479B2 (cs)
DE (1) DE3661275D1 (cs)
ES (1) ES8706934A1 (cs)
SU (1) SU1586523A3 (cs)
UA (1) UA7024A1 (cs)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6055966A (ja) * 1983-09-05 1985-04-01 オリンパス光学工業株式会社 医用電極装置
LU86336A1 (fr) * 1986-03-04 1987-11-11 Wurth Paul Sa Installation de chargement d'un four a cuve
LU86820A1 (fr) * 1987-03-24 1988-11-17 Wurth Paul Sa Charpente de support d'une installation de chargement d'un four a cuve
LU86822A1 (fr) * 1987-03-24 1988-11-17 Wurth Paul Sa Procede et dispositif de correction de la trajectoire de chute dans une installation de chargement d'un four a cuve
JPH0441108Y2 (cs) * 1988-04-15 1992-09-28
CH678847A5 (cs) * 1989-06-02 1991-11-15 Maerz Ofenbau
US5458450A (en) * 1993-05-07 1995-10-17 Exxon Chemical Patents Inc. Pressure-vacuum rated flexible connector for use in material handling systems
US5450984A (en) * 1994-04-29 1995-09-19 K-Tron Technologies, Inc. Material feeding apparatus
US6196417B1 (en) * 1995-04-04 2001-03-06 Paul S. Johnson Method and apparatus for improved regulation of flow of particulate matter
ITGE20030033A1 (it) * 2003-05-14 2004-11-15 Sms Demag S P A Reattore siderurgico per la produzione di ghisa.
JP4781801B2 (ja) * 2005-12-01 2011-09-28 株式会社イシダ 計量装置
EP1811045A1 (en) * 2006-01-20 2007-07-25 Paul Wurth S.A. Multiple hopper charging installation for a shaft furnace
CN101619370B (zh) * 2009-08-10 2010-09-29 重庆钢铁(集团)有限责任公司 快速消除称量料罐底部堵料的结构
CN103884188B (zh) * 2014-04-17 2015-08-12 大连华锐重工集团股份有限公司 一种半密闭矿热炉炉顶加料装置
CN103949326B (zh) * 2014-05-13 2016-08-24 上海建冶路桥机器设备有限公司 一种磨粉机的可控排料装置
LU92837B1 (en) * 2015-09-25 2017-04-03 Wurth Paul Sa Sealing valve arrangement for a shaft furnace charging installation
WO2024180485A1 (en) * 2023-02-28 2024-09-06 Flsmidth A/S Filling level monitoring in the pitot tube of a shaft furnace
CN118910347B (zh) * 2024-10-10 2024-12-13 襄汾县新兴冶炼有限公司 一种高炉定量加料装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR983066A (fr) * 1949-01-25 1951-06-19 Ingenieur Bu Ro Fu R Hu Ttenba Procédé de fonctionnement de haut fourneau et appareil analogue
SU96769A1 (ru) * 1951-05-28 1953-11-30 А.Ф. Кутанин Сетчатый барабан к трепальным машинам
US2903144A (en) * 1958-09-26 1959-09-08 Arthur J Stock Non-segregating system for handling and feeding solid particulate material
BE755798A (fr) * 1969-09-17 1971-02-15 Armco Steel Corp Dispositif d'alimentation pour un four a cuve alimente par gravite
AT332432B (de) * 1972-03-06 1976-09-27 Wurth Anciens Ets Paul Dosierungsanlage fur schachtofen, insbesondere hochofen und verfahren zum messen des mollergewichtes
LU66430A1 (cs) * 1972-11-08 1973-02-05
FR2224370B1 (cs) * 1973-04-06 1979-05-25 Hermanns Wilhelm
FR2224373A1 (en) * 1973-04-09 1974-10-31 Delattre Levivier Admitting measured charges into e.g. blast furnaces - using appts. unaffected by high press. and temp
US4395179A (en) * 1976-03-10 1983-07-26 Davy Inc. Apparatus and method for charging material into a receptacle
JPS5638409A (en) * 1979-09-04 1981-04-13 Kawasaki Steel Corp Charging of raw material into blast furnace
DE3007743C2 (de) * 1980-02-29 1982-11-11 Estel Hoesch Werke Ag, 4600 Dortmund Verfahren zum gleichmäßigen Begichten von Hochöfen
GB2106064B (en) * 1981-06-25 1985-06-19 Pertocarb Inc Pneumatic conveyance of solids

Also Published As

Publication number Publication date
SU1586523A3 (ru) 1990-08-15
JP2587919B2 (ja) 1997-03-05
KR930009969B1 (ko) 1993-10-13
CN86103167A (zh) 1986-11-05
DE3661275D1 (en) 1988-12-29
EP0200996A1 (fr) 1986-11-12
UA7024A1 (uk) 1995-03-31
ES8706934A1 (es) 1987-07-01
CA1269832A (en) 1990-06-05
KR860009132A (ko) 1986-12-20
JPS61264111A (ja) 1986-11-22
CN1008939B (zh) 1990-07-25
ES554642A0 (es) 1987-07-01
CS258479B2 (en) 1988-08-16
BR8602182A (pt) 1987-01-13
US4767258A (en) 1988-08-30

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