US3864984A - Control device for a distributor chute in a shaft furnace, particularly a blast furnace - Google Patents

Control device for a distributor chute in a shaft furnace, particularly a blast furnace Download PDF

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Publication number
US3864984A
US3864984A US403900A US40390073A US3864984A US 3864984 A US3864984 A US 3864984A US 403900 A US403900 A US 403900A US 40390073 A US40390073 A US 40390073A US 3864984 A US3864984 A US 3864984A
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US
United States
Prior art keywords
drive
rotary
chute
control
casing
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Expired - Lifetime
Application number
US403900A
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English (en)
Inventor
Edouard Legille
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
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Anciens Etablissements Paul Wurth SA
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
    • Y10T74/18616—Single input, plural outputs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19828—Worm

Definitions

  • the invention relates to a control device for a distributor chute for raw material arranged in the top of a shaft furnace particularly a blast furnace.
  • a rotary distributor chute is arranged centrally in the blast furnace top, its pitch angle being adjustable relative to the blast furnace central axis.
  • the charge to be supplied is fed to the distributor chute in controlled quantities via a central feed channel from storage hoppers mounted above the distribution device.
  • the distributor chute is pivotally mounted, so as to permit an adjustable pitch angle, on the underside of a rotary ring which is concentric to the central feed channel.
  • the rotary ring is connected with a main drive via a first rotary sleeve, which rotates the rotary ring and the distributor chute fixed to the underside thereof.
  • a second rotary sleeve is provided for the pitch angle adjustment of the distributor chute; the second sleeve having a sinusoidal slot on its innerside and being arranged outside the first-rotary sleeve and concentrically to the central feed channel.
  • the second rotary sleeve is driven synchronously with the first rotary sleeve.
  • the drive means includes a planet gear which permits the speed of the second sleeve to be increased or decreased relative to the first sleeve.
  • a runner engages in the sinusoidal slot on the inside of the second rotary sleeve and can slide along this slot.
  • the runner is fixed to a cylinder which is displaceably connected with the inner rotary sleeve in a vertical direction. Via a rod connection, the cylinder is connected with the end of the chute remote from the discharge end of the distributor chute.
  • the distributor chute is arranged in pitch adjustable manner on the underside of the rotary ring, the angle of inclination of the distributor chute may be varied relative to the blast furnace central axis by raising or lowering the rod connection.
  • the particular setting of the angle of inclination or pitch of the distributor chute is determined by the position or relative speed of the two concentrically rotating rotary sleeves.
  • the runner which is carried along by the cylinder and which as noted is vertically displaceable in the channel of the inner rotary sleeve, does not change its position relative to the outer rotary sleeve on the sinusoidal slot.
  • the outer rotary sleeve is moving faster or. slower than the inner rotary sleeve the runner runs along the sinusoidal slot so that a raising or lowering of the rod connection is brought about leading to a change in the angle of inclination of the distributor chute.
  • the distributor chute is suspended on the underside of a rotary disc arranged concentrically to the central feed channel, said rotary disc being caused to rotate via a rotary sleeve by a main drive motor and intermediate gears.
  • a toothed rim On the top of the rotary disc is arranged a toothed rim which can be rotated via a planet gear and an auxiliary motor independently of the rotation of the rotary disc.
  • the toothed rim located on the top of the rotary disc drives a shaft passing through the rotary disc and rotably mounted therein which in turn drives a device for the angular adjustment of the distributor chute arranged on the bottom of the rotary disc.
  • the attachment of the distributor chute is arranged in such a way that, at its material feed end, it is attached at one of its longitudinal sides to a suspension device whereby the chute can be secured or detached from a drive chamber located above the rotary disc.
  • the material feed end of the distributor chute is firmly but detachably connected with an adjusting arm.
  • the adjusting arm represents the connection between the distributor chute and the angular adjusting drive.
  • the drive as described in the hereinbefore mentioned co-pending application Ser. No. 368,867 comprises a planet gear which is driven on the one hand by a main motor and on the other by an auxiliary motor. Whilst the main motor also effects the rotation of the distributor chute, the planet gear and the auxiliary motor adjust the inclination angle of the distributor chute.
  • the inclination angle of the distributor chute is therefore brought about by the relative movement of two independently rotatable members such as, e.g., the combination rotary sleeve rotary sleeve or rotary sleeve toothed rim.
  • the object of the present invention is to provide a drive which, whilst retaining the advantages of the known drive devices such as e.g., the independent performance of the rotary movement and the pitch angle adjustment of the distributor chute, can be simply constructed in a light weight design and eliminate to the greatest possible extent the above-indicated disadvantages of previous drive devices.
  • the invention provides a control device for a distributor chute in a shaft furnace, particularly a blast furnace, wherein the distributor chute is connected at its two longitudinal sides in a pivotable manner at the underside of a rotary casing.
  • the chute is provided, at the end remote from its discharge end with a rod connection.
  • the rod connection comprises, at its end remote from the distributor chute, a mounting which can be raised or lowered via a drive to modify the pitch angle of the chute relative to the blast furnace cantral axis.
  • drive for modifying the pitch angle of the distributor chute is constructed separately and independently from the drive for rotating the distributor chute via the said rotary casing.
  • the means for the pitch angle adjustment of the distributor chute in contradistinction to the prior art, is not connected via a planet gear with the drive for rotating the distributor chute.
  • the distributor chute is suspended in a pitch angle adjustable manner in the blast furnace top centrally on a rotary casing which is concentric to the central feed channel.
  • the control bringing about the rotary movement of the rotary casing comprises, in addition to a drive motor, an intermediate gear in order to adapt the speed of the drive motor to the necessary rotary casing speed.
  • the distributor chute In order to bring about the pitch angle adjustment or change of the distributor chute, the distributor chute is suspended in rotary manner on its two longitudinal sides on two diametrically opposite points of the rotary casing. Furthermore the distributor chute is connected at its end remote from the material discharge point with a rod connection which, as a result of its upward and downward movement, causes the distributor chute to pivot about its connection with the rotary casing and thereby varies the pitch angle or angle of inclination of the distributor chute relative to the blast furnace central axis.
  • the rod connection is T- shaped at its lower end and is connected in a pivotable manner with the end of the distributor chute remote from the discharge channel.
  • This connection is constructed in such a way that it can be detached or fixed from a hand hole on the blast furnace wall without any difficulty.
  • the rod connection is connected with a device for raising or lowering the latter. It is stressed that the engagement point of the rod connection on the distributor chute as well as its displacement path are selected in such a way that the distributor chute can without difficulty be pivoted from the vertical into the horizontal position.
  • the device for raising or lowering the rod connection comprises a rotary ring arranged concentrically to the rotary casing with which the end of the rod connection remote from the distributor chute is connected in a pivotable manner.
  • This rotary ring is in turn mounted in a roller rotary connection; e.g., a Rothe Erde ring, and retained in the latter.
  • the rotary ring is rotated by the distributor chute via the rod connection.
  • the roller rotary connection may be raised or lowered over its complete periphery.
  • the rotary ring as well as the rod connection connected with the latter also necessarily carries out this raising or lowering movement.
  • the roller rotary connection is carried by three positioning devices or mountings periphally displaced by Each of said positioning devices comprises a holder for the roller rotary connection as well as an inner thread which engages an endless screw.
  • the endless screws of the three positioning devices are rotated by a common drive so that the roller rotary connection is uniformly raised or lowered over its complete periphery.
  • purified and cooled blast furnace gas or inert gas can be introduced from the outside into the casing for cleaning and cooling the gears exposed to dust and temperature in the throat of the blast furnace.
  • FIG. 1 is a longitudinal section through the installation according to the invention, the distributor chute being represented assuming two different positions in two planes perpendicular to each other,
  • FIG. 2 is a cross section of a preferred embodiment of the drive as well as of the gear for the pitch angle adjustment for the distributor chute,
  • FIG. 3 is a cross section through a construction of the guide for the positioning devices and FIG. 4 is a view of .the rod device.
  • a distributor chute 2 (only partially shown) is arranged centrally in a rotary and pitch angle adjustable manner in a blast furnace top 4 whereby the rotation and pitch angle adjustment of the distributor chute 2 are two independent movements which are performed by two separate and different drives and gears.
  • the charge is supplied to the distributor chute 2 via a centrally arranged feed channel 6.
  • the rotary drive in addition to the toothed rim 20 and the rotary casing 12 fixed to the latter, comprises a drive motor 22, a reduction gear 24, a transmission shaft 26 having a suitable pinion 28 fixed thereon, as well as a spacer gear wheel 30.
  • Drive motor 22 and reduction gear 24 are mounted on the outer casing 32 of drive chamber 18. Only transmission shaft 26 passes through the outer casing 32 and is mounted in a gas-tight manner in the latter.
  • the pinion 28 engages in spacer gear wheel 30 which forms the connection to toothed rim 20.
  • the reduction gear adapts the speed of the drive motor 22 to the necessary speed of rotation of rotary casing 12.
  • the spacer gear wheel 30 has for its object merely a spatially advantageous arrangement of the rotary drive components.
  • This raising and lowering device comprises a rod connection 34 which is constructed in T-shaped manner at its one end. As shown in FIG. 4, this T- shaped connection 36 is connected in pivotable manner to the underside of the distributor chute 2.
  • a raising or lowering of rod connection 34 brings about a pivoting movement of distributor chute 2 about its two connections 8 and 10 and therefore varies the pitch angle of distributor chute 2.
  • the rod connection is connected via a ball and socket joint 38 with a retaining ring 40.
  • Retaining ring 40 is fixed in rigidizing section 42 which also embraces a rotary ring 44.
  • Rotary ring 44 is mounted and retained in a roller rotary connection 46 which is in turn firmly but detachably fixed to a device which permits the raising or lowering, in a uniform peripheral manner, of the roller rotary connection.
  • the roller rotary connection 46 On the periphery of the roller rotary connection 46 there are provided a plurality, and preferably three, positioning devices 48, 50 and 52 (see FIG. 1 and 3) displaced by 120 relative to one another.
  • the positioning devices are connected to the roller rotary connection 46 via detachable spindles.
  • Each of the positioning devices 48, 50 and 52 is provided with a thread which engages respective vertically arranged endless screw 54, 56 and 58.
  • the three endless screws 54, 56 and 58 are driven synchronously via a common drive 60 (FIG. 2). Therefore the endless screws 54, 56 and 58 are provided at their upper ends with respective pinion or worm wheels 62, 64, 66 which are rotated via respective worm threads 68, 70, 72.
  • FIG. 1 On the periphery of the roller rotary connection 46 there are provided a plurality, and preferably three, positioning devices 48, 50 and 52 (see FIG. 1 and 3) displaced by 120 relative to one another.
  • the positioning devices are connected to
  • the worm threads are interconnected and connected with the common drive 60 via shafts 74, 76 and 78 and via angle connections 80 and 82.
  • Drive 60 comprises a reversible drive motor 84, as well as an intermediate gear 86 which drives the shaft 76.
  • Drive 60, worm gears 62, 68, 64, 70, 66, 72 as well as the shafts are constructed so as to be mounted on the outer casing 32 of drive chamber 18.
  • the upper ends of the three endless screws 54, 56 and 58, which are not threads, are mounted in gas-tight manner in the upper sealing cover of outer casing 32. Furthermore the endless screws are held in bearings at their lower ends.
  • positioning devices 48, 50, 52, as shown in FIG. 3, in order to bring about increased rigidity are held respectively by two slide bars 88, 90, or 92, 94, or 96, 98 which are held at their two ends on the inner side of outer casing 32.
  • connection pipe 100 Since however that part of the installation located in casing 32 is exposed to the direct heat as well as the dust of the blast furnace, cooled and cleaned throat gas or inert gas is passed through connection pipe 100. This gas is under a slightly higher pressure than that occurring at the throat so that there is maintained a limited gas flow from the drive chamber 18 into the blast furnace top.
  • the cooling or cleaning gas flow is indicated by arrow l02 in FIG. 1.
  • rotary casing 12 is provided on its underside with a horizontal sealing disc 104 which only leaves a small gap relative to the outer casing 32 through which the gas flows.
  • Sealing disc 104 only has an appropriate recess for the passage of rod 34.
  • rod 34 In order to keep this recess as small as possible rod 34 is shaped like an extended S-line. On raising and lowering rod 34 when viewed horizontally the latter remains virtually unchanged in position at the level of sealing disc 104.
  • a ring 106 bears on sealing disc 104 and is carried freely by rod 34 so as to follow the movement changes of rod 34 and partly or completely covers the remaining gap in the recess for the passage of rod 34.
  • outer casing 32 has three bulges which surround in a gas-tight manner the positioning devices 48, 50 and 52 as well as worms 54, 56 and 58 and their guides.
  • roller rotary connection 46 Since the roller rotary connection 46 is not easily accessible from the outside for lubrication purposes it is connected via a flexible hose 108 with the outer casing 32 and a lubricant supply. Flexible hose 108 is fixed to the outer casing 32 preferably at half the height thereof, so that for a minimum length it still reaches the highest or lowest point of the movement of the roller rotary connection 46.
  • two large hand holes 110 are provided at two diametrically opposite points which duringblast furnace operation are sealed in gas-tight manner and are only opened on assembly or disassembly of the distributor chute.
  • the two pivoting connections 8 and 10 and the attachment of rod 34 to the distributor chute 2 can be easy to reach from these holes 110.
  • an appropriate recess is provided through which the distributor chute which has been detached from its connections can be introduced or removed in per se known manner with the aid of a crane cross bar.
  • the rotary ring 40 can be replaced by a segment-shaped partial ring whereby the length of said ring must be made such that its rotation within the roller rotary connection 46 is not impaired.
  • the advantage of the installation according to the invention lies mainly in the simplicity of the basic concept of the control and the construction of the individual components of the installation.
  • the relative movements of the drives for the rotation or pitch angle adjustment of the distributor chute are no longer necessary and their relatively large and complicated gears are replaced by two simple separate drives.
  • the main components subject to wear are easily accessible and can be replaced without shutting down the furnace for a long time.
  • cooled and cleaned throat gas or inert gas can be introduced in an effective small amount in the control device of the invention for cooling and cleaning of the gear parts located within the gas-tight casing and which are exposed to the heat and the dust present in the top of the furnace.
  • an improved chute position control comprising;
  • vertically movable angular drive means said vertically movable drive means being fixed in position on the furnace and including at least a first vertically movable output member;
  • said rod means comprises a rod having an extended S-shape and formed in a T-shaped manner at its first end.
  • said motion transmitting means comprises:
  • a rod having an extended S-shape and formed in a T- shaped manner at its first end.
  • control of claim 1 further comprising:
  • Method for charging a shaft furnace comprising the steps of rotating the charge distribution chute by means of a rotary casing separately and independently therefrom adjusting the pitch angle of the distribution chute relative to the blast furnace central axis.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US403900A 1972-10-11 1973-10-05 Control device for a distributor chute in a shaft furnace, particularly a blast furnace Expired - Lifetime US3864984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU66273 1972-10-11

Publications (1)

Publication Number Publication Date
US3864984A true US3864984A (en) 1975-02-11

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ID=19727175

Family Applications (1)

Application Number Title Priority Date Filing Date
US403900A Expired - Lifetime US3864984A (en) 1972-10-11 1973-10-05 Control device for a distributor chute in a shaft furnace, particularly a blast furnace

Country Status (15)

Country Link
US (1) US3864984A (fr)
JP (1) JPS572763B2 (fr)
AT (1) AT329612B (fr)
BE (1) BE805858A (fr)
CA (1) CA1006350A (fr)
DE (1) DE2348077C2 (fr)
ES (1) ES419517A1 (fr)
FR (1) FR2202940B1 (fr)
GB (1) GB1441298A (fr)
IN (1) IN140095B (fr)
IT (1) IT995796B (fr)
LU (1) LU66273A1 (fr)
NL (1) NL181214C (fr)
SU (1) SU606563A3 (fr)
ZA (1) ZA737691B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032024A (en) * 1974-11-26 1977-06-28 Demag Aktiengesellschaft Apparatus for distribution of charge material in shaft furnaces, particularly high pressure blast furnaces
US4316681A (en) * 1978-07-31 1982-02-23 Sansho Kabushiki Kaisha Blending equipment
US4718811A (en) * 1986-01-21 1988-01-12 Lancaster Level Flo, Inc. Silage distributor apparatus
US4821596A (en) * 1987-02-25 1989-04-18 Erik Eklund Rotator
CN114347475A (zh) * 2021-12-10 2022-04-15 徐州先临三维云打印技术有限公司 一种3d打印机的空气过滤装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111014B2 (fr) * 1973-01-31 1976-04-08
LU80112A1 (fr) * 1978-08-16 1979-01-19
LU82173A1 (fr) * 1980-02-15 1980-05-07 Wurth Sa O Dispositif de chargement pour fours a cuve
JPS6276975A (ja) * 1985-09-30 1987-04-09 Asahi Seimitsu Kk Ｃｃｔｖカメラ用レンズの自動絞りアンプにおける温度補償方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1472848A (en) * 1918-01-31 1923-11-06 Maag Max Drag-spindle mechanism
US1751650A (en) * 1927-06-01 1930-03-25 Henry W Nieman Power-transmission mechanism
US3440610A (en) * 1964-12-22 1969-04-22 Breguet Louis Atel Aviat Sa Apparatus for storing information elements
US3533522A (en) * 1968-03-08 1970-10-13 Demag Ag Furnace top distributor for shaft furnace,particularly for blast furnaces
US3598257A (en) * 1968-07-10 1971-08-10 Huettenwerk Oberhausen Ag Apparatus for charging shaft-type furnaces
US3640138A (en) * 1969-12-12 1972-02-08 Heald Machine Co Machine tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU59207A1 (fr) * 1969-07-31 1969-12-10 Wurth Anciens Ets Paul

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1472848A (en) * 1918-01-31 1923-11-06 Maag Max Drag-spindle mechanism
US1751650A (en) * 1927-06-01 1930-03-25 Henry W Nieman Power-transmission mechanism
US3440610A (en) * 1964-12-22 1969-04-22 Breguet Louis Atel Aviat Sa Apparatus for storing information elements
US3533522A (en) * 1968-03-08 1970-10-13 Demag Ag Furnace top distributor for shaft furnace,particularly for blast furnaces
US3598257A (en) * 1968-07-10 1971-08-10 Huettenwerk Oberhausen Ag Apparatus for charging shaft-type furnaces
US3640138A (en) * 1969-12-12 1972-02-08 Heald Machine Co Machine tool

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032024A (en) * 1974-11-26 1977-06-28 Demag Aktiengesellschaft Apparatus for distribution of charge material in shaft furnaces, particularly high pressure blast furnaces
US4316681A (en) * 1978-07-31 1982-02-23 Sansho Kabushiki Kaisha Blending equipment
US4718811A (en) * 1986-01-21 1988-01-12 Lancaster Level Flo, Inc. Silage distributor apparatus
US4821596A (en) * 1987-02-25 1989-04-18 Erik Eklund Rotator
CN114347475A (zh) * 2021-12-10 2022-04-15 徐州先临三维云打印技术有限公司 一种3d打印机的空气过滤装置

Also Published As

Publication number Publication date
AT329612B (de) 1976-05-25
ZA737691B (en) 1974-08-28
LU66273A1 (fr) 1973-01-23
NL181214C (nl) 1987-07-01
FR2202940A1 (fr) 1974-05-10
JPS4973306A (fr) 1974-07-16
IN140095B (fr) 1976-09-11
ES419517A1 (es) 1976-04-01
DE2348077A1 (de) 1974-04-18
BE805858A (fr) 1974-02-01
NL181214B (nl) 1987-02-02
NL7313356A (fr) 1974-04-16
FR2202940B1 (fr) 1977-03-11
AU6122273A (en) 1975-04-10
ATA822973A (de) 1975-08-15
GB1441298A (en) 1976-06-30
JPS572763B2 (fr) 1982-01-18
IT995796B (it) 1975-11-20
DE2348077C2 (de) 1983-12-15
CA1006350A (fr) 1977-03-08
SU606563A3 (ru) 1978-04-22

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