EP0204935B1 - Procédé de contrôle du chargement d'un four à cuve - Google Patents

Procédé de contrôle du chargement d'un four à cuve Download PDF

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Publication number
EP0204935B1
EP0204935B1 EP86105644A EP86105644A EP0204935B1 EP 0204935 B1 EP0204935 B1 EP 0204935B1 EP 86105644 A EP86105644 A EP 86105644A EP 86105644 A EP86105644 A EP 86105644A EP 0204935 B1 EP0204935 B1 EP 0204935B1
Authority
EP
European Patent Office
Prior art keywords
valve
flow
hopper
charging
real
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
EP86105644A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0204935A1 (fr
Inventor
Gilbert Bernard
Emile Breden
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
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Priority to AT86105644T priority Critical patent/ATE41679T1/de
Publication of EP0204935A1 publication Critical patent/EP0204935A1/fr
Application granted granted Critical
Publication of EP0204935B1 publication Critical patent/EP0204935B1/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

Definitions

  • the present invention relates to a method for controlling the loading of a shaft furnace, comprising a rotary or oscillating distribution chute for ensuring the distribution of the material on the loading surface of the furnace, one or more hoppers for storing the material in the above the oven, each provided with a metering valve for adjusting the flow rate of the loading material flowing from the hopper to the chute, a weighing system for determining the content of the hopper, method according to which it is determined, by calculation or experiment, the initial degree of opening of the valve so that the content of a hopper flows in a determined time, we memorize, for different types of material and different loading conditions, the theoretical curves of a flow constant determined as well as the corresponding position of the metering valve to ensure flow over the determined time, these curves providing at all times the set flow rate Q c and the position of the valve and, the actual flow rate Q is established at determined intervals, by measuring the reduction in weight AP of the content of the hopper per unit of time At and the actual flow rate Q is compared with the
  • a shaft furnace When loading a shaft furnace using a distribution chute, it is generally arranged so as to deposit a layer, with diametrical symmetry and circular uniformity, on the loading surface using the contents d 'a storage hopper.
  • a predetermined time imposed by the efficiency and capacity of the furnace, the distribution method and the coordination of operations, such as opening, closing of the valves, supply of the loading material, etc. Knowing therefore this available time, it is necessary to adjust the opening of the metering valve controlling the flow out of the hopper so that it empties at the moment when the chute ends its scanning phase at the expiration of the imposed time.
  • the reduction in weight reduces the thrust on the flow so that the flow falls below the set flow. Because of this slowing, one necessarily exceeds the time imposed by the loading of the contents of a hopper into the oven, which not only disturbs the loading program, but in addition, is the cause of non-symmetrical loading, c that is, the height of the deposited layer is irregular in the circular direction of the loading surface. Other factors, such as the humidity level or the grain size of the loading material, can influence the flow rate.
  • the object of the present invention is to provide a new method for operating the metering valve so as to ensure an almost uniform flow corresponding to the set flow.
  • the method proposed by the present invention is characterized in that the metering flap is opened each time the actual flow is less than the set flow and in that it is maintained in position when the actual flow is higher than the set flow.
  • the valve is opened at an amplitude AS which corresponds to the difference between the position of the valve corresponding to the set flow rate Q c and that corresponding to the actual flow Q ,.
  • the actuation speed of the valve is proportional to the difference AS, that is to say if this difference AS is large, the valve is moved relatively quickly, whereas if this difference AS is weak, the valve is moved slowly.
  • AS the difference between the two valves.
  • Figure 1 shows, in bold lines, the curve representing the actual weight P ,, that is to say the measured weight while the curve in dashed lines represents the target weight P c which should allow a uniform flow of the loading material in the imposed time T.
  • the gradient of these curves that is to say represents the flow rate which is constant for the curve P c .
  • the horizontal evolution of the flow rate of each of the curves P, and P c represents the phase of opening of the metering valve.
  • the reduction in weight of the hopper should be linear to ensure constant flow corresponding to the set flow Q c .
  • the evolution of the two curves shows, from a certain moment, the difference between the weight and the material which is actually in the hopper and that of the material which should still be there to respect the constant flow Q c becomes larger and larger and the hopper will not be empty until well beyond the imposed time T.
  • FIG. 4 shows the head of an oven 10 in which there is a chute 12 driven by a drive device 14 to rotate it around the axis of the oven and adjust its angle of discharge.
  • a frame 16 carried by the oven 10 supports, via a series of load cells 20, a hopper 18. These load cells constantly provide information on the weight of the hopper 18 and, consequently, on its content.
  • the flow orifice of this hopper 18 is controlled by a metering valve 22 which can be composed of two registers with symmetrical movement around the axis of the oven.
  • This metering valve 22 is actuated by a hydraulic cylinder 24, while the actual position of the valve is constantly determined by a position detector 26.
  • the hydraulic cylinder 24 controlling the position of the metering valve 22 is actuated by a hydraulic valve 28 with proportional action which receives the oil under pressure from a hydraulic unit 30.
  • the control circuit also includes a computer 32 for carrying out the operations of calculation and memorizing all the necessary information. The information from this computer 32 is transmitted to a control unit 34 which controls the hydraulic valve 28 to regulate the oil flow, that is to say the operating speed of the hydraulic cylinder 24 and of the valve 22.
  • the oil flow rate is adjusted by the valve 28 on the order of the control unit 34 as a function of the quantity AS, that is to say that the valve 28 is moved faster when AS is large, and conversely, is moved more and more slowly as AS decreases. It is even preferable to stop the valve when AS reaches a predetermined lower limit to be certain to avoid that the valve does not exceed its set position and possibly risk thus finding itself in the situation of FIG. 2.

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)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Heat Treatment Of Articles (AREA)
  • Blast Furnaces (AREA)
  • Control Of High-Frequency Heating Circuits (AREA)
  • Cookers (AREA)
  • Electric Stoves And Ranges (AREA)
  • Looms (AREA)
EP86105644A 1985-05-10 1986-04-23 Procédé de contrôle du chargement d'un four à cuve Expired EP0204935B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105644T ATE41679T1 (de) 1985-05-10 1986-04-23 Verfahren zum kontrollieren der beschickung eines schachtofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU85892A LU85892A1 (fr) 1985-05-10 1985-05-10 Procede de controle du chargement d'un four a cuve
LU85892 1985-05-10

Publications (2)

Publication Number Publication Date
EP0204935A1 EP0204935A1 (fr) 1986-12-17
EP0204935B1 true EP0204935B1 (fr) 1989-03-22

Family

ID=19730462

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105644A Expired EP0204935B1 (fr) 1985-05-10 1986-04-23 Procédé de contrôle du chargement d'un four à cuve

Country Status (16)

Country Link
US (1) US4714396A (enrdf_load_stackoverflow)
EP (1) EP0204935B1 (enrdf_load_stackoverflow)
JP (1) JPH0776372B2 (enrdf_load_stackoverflow)
KR (1) KR930009386B1 (enrdf_load_stackoverflow)
CN (1) CN1006554B (enrdf_load_stackoverflow)
AT (1) ATE41679T1 (enrdf_load_stackoverflow)
AU (1) AU574574B2 (enrdf_load_stackoverflow)
BR (1) BR8602270A (enrdf_load_stackoverflow)
CA (1) CA1269831A (enrdf_load_stackoverflow)
CZ (1) CZ320186A3 (enrdf_load_stackoverflow)
DE (1) DE3662533D1 (enrdf_load_stackoverflow)
ES (1) ES8703618A1 (enrdf_load_stackoverflow)
IN (2) IN165912B (enrdf_load_stackoverflow)
LU (1) LU85892A1 (enrdf_load_stackoverflow)
SU (1) SU1493112A3 (enrdf_load_stackoverflow)
ZA (1) ZA863206B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8034157B2 (en) 2005-10-24 2011-10-11 Siemens Vai Metals Technologies Gmbh Method and device for charging feedstock

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE8903711U1 (de) * 1989-01-25 1989-05-18 Colortronic GmbH, 61381 Friedrichsdorf Dosiereinrichtung zum Dosieren mindestens eines Schüttgutes
CH678847A5 (enrdf_load_stackoverflow) * 1989-06-02 1991-11-15 Maerz Ofenbau
US5103401A (en) * 1989-11-21 1992-04-07 Merrick Industries, Inc. System for precisely controlling discharge rates of loss-in-weight feeder systems
US5458450A (en) * 1993-05-07 1995-10-17 Exxon Chemical Patents Inc. Pressure-vacuum rated flexible connector for use in material handling systems
JPH07258650A (ja) * 1994-03-23 1995-10-09 Kawasaki Steel Corp コークス炉における原料炭の装入方法およびその装置
US5784974A (en) * 1997-04-22 1998-07-28 General Signal Corporation System for improving fuel feed control of volumetric coal feeders
DE19912995A1 (de) 1999-03-23 2000-09-28 Focke & Co Packung nach Art einer Zigarettenstange
CN101353116B (zh) * 2008-09-05 2012-03-14 江苏省冶金设计院有限公司 旋转料床设备及其铺装料机构
CN101748227B (zh) * 2008-12-19 2011-09-21 宝山钢铁股份有限公司 一种高炉炉顶称量罐的称量装置及方法
LU91526B1 (en) 2009-02-11 2010-08-12 Wurth Paul Sa Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace
LU91525B1 (en) 2009-02-11 2010-08-12 Wurth Paul Sa Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace
CN103436648B (zh) * 2013-08-30 2015-09-16 莱芜钢铁集团有限公司 高炉布料中溜槽料流开度的调整方法及装置
CN109580983A (zh) * 2018-12-17 2019-04-05 苏州宇量电池有限公司 一种锂离子电池浆料的过筛流速测定方法
CN115303823B (zh) * 2022-10-12 2023-01-24 常州百韩科智能装备有限公司 多通道高精度粉体定量给料系统及其给料工艺

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1947200A1 (de) * 1969-09-18 1971-04-01 Still Fa Carl Vorrichtung zum gleichmaessigen Einfuellen der Kokskohle in horizontale Verkokungsofenkammern aus Fuellbehaeltern von Fuellwagen
DE2216552C3 (de) * 1972-04-06 1980-10-30 Bayer Ag, 5090 Leverkusen Disubstituierte N- [Aminomethyliden] - thiol-(thiono)-phosphorsäureesterimide, Verfahren zu ihrer Herstellung und ihre Verwendung als Insektizide und Akarizide
LU66430A1 (enrdf_load_stackoverflow) * 1972-11-08 1973-02-05
LU77547A1 (enrdf_load_stackoverflow) * 1977-06-16 1977-09-19
JPS5647506A (en) * 1979-09-28 1981-04-30 Nippon Steel Corp Controlling raw material charging into blast furnace
JPS5678730A (en) * 1979-11-27 1981-06-27 Sumitomo Heavy Ind Ltd Feeding device for coal in coal charging truck
JPS56136908A (en) * 1980-03-28 1981-10-26 Sumitomo Metal Ind Ltd Charging method for bell-less type blast furnace
DE3212423A1 (de) * 1982-04-02 1983-10-13 Krupp Polysius Ag, 4720 Beckum Verfahren zum pneumatischen austrag von gut aus einem vorratsbehaelter
JPS6043406B2 (ja) * 1983-02-10 1985-09-27 石川島播磨重工業株式会社 原料コントロ−ルゲ−トの制御方法
US4527714A (en) * 1983-02-18 1985-07-09 White River Technologies, Inc. Pressure responsive hopper level detector system
JPS59229407A (ja) * 1983-06-09 1984-12-22 Kawasaki Steel Corp ベルレス高炉の原料装入方法
JPS6043415A (ja) * 1983-08-18 1985-03-08 Ishikawajima Harima Heavy Ind Co Ltd 炉頂原料装入装置の制御装置
JPS6046306A (ja) * 1983-08-24 1985-03-13 Ishikawajima Harima Heavy Ind Co Ltd 炉頂原料装入装置の制御方法
US4659274A (en) * 1984-11-13 1987-04-21 Accutrol Incorporated Computer controlled load-out system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8034157B2 (en) 2005-10-24 2011-10-11 Siemens Vai Metals Technologies Gmbh Method and device for charging feedstock

Also Published As

Publication number Publication date
EP0204935A1 (fr) 1986-12-17
JPS61266512A (ja) 1986-11-26
US4714396A (en) 1987-12-22
CN86103226A (zh) 1986-11-05
ATE41679T1 (de) 1989-04-15
ES8703618A1 (es) 1987-03-01
AU5687486A (en) 1986-11-20
CN1006554B (zh) 1990-01-24
KR930009386B1 (ko) 1993-10-02
LU85892A1 (fr) 1986-12-05
CA1269831A (en) 1990-06-05
CZ320186A3 (en) 1994-01-19
AU574574B2 (en) 1988-07-07
ES554736A0 (es) 1987-03-01
SU1493112A3 (ru) 1989-07-07
IN167117B (enrdf_load_stackoverflow) 1990-09-01
ZA863206B (en) 1987-02-25
KR860009133A (ko) 1986-12-20
JPH0776372B2 (ja) 1995-08-16
IN165912B (enrdf_load_stackoverflow) 1990-02-10
DE3662533D1 (en) 1989-04-27
BR8602270A (pt) 1987-01-21

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