WO1998029323A1 - Apparatus for processing lumpy material - Google Patents

Apparatus for processing lumpy material Download PDF

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Publication number
WO1998029323A1
WO1998029323A1 PCT/FI1997/000829 FI9700829W WO9829323A1 WO 1998029323 A1 WO1998029323 A1 WO 1998029323A1 FI 9700829 W FI9700829 W FI 9700829W WO 9829323 A1 WO9829323 A1 WO 9829323A1
Authority
WO
WIPO (PCT)
Prior art keywords
conveyor
belt conveyor
belt
essentially
speed
Prior art date
Application number
PCT/FI1997/000829
Other languages
French (fr)
Inventor
Eero VÄÄNÄNEN
Martti Jankkila
Original Assignee
Outokumpu Technology Oy
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 Outokumpu Technology Oy filed Critical Outokumpu Technology Oy
Priority to BR9713664-6A priority Critical patent/BR9713664A/en
Priority to EP97948936A priority patent/EP0963332B1/en
Priority to AT97948936T priority patent/ATE213222T1/en
Priority to US09/331,278 priority patent/US6401908B1/en
Priority to DE69710499T priority patent/DE69710499T2/en
Priority to EA199900605A priority patent/EA000823B1/en
Publication of WO1998029323A1 publication Critical patent/WO1998029323A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
    • B65G69/0408—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials by relatively moving an endless feeding means

Definitions

  • the present invention relates to an apparatus for processing lumpy and advantageously spherical material, such as pellets, so that the lumpy material can be applied on an essentially continuously moving surface to form a layer which is advantageous both in thickness and in cross-section, so that in the further processing of the lumpy material, the gas to be conducted through said layer can be made to penetrate the layer in an essentially homogeneous fashion.
  • a finely ground material such as concentrate must first be pelletized and thereafter sintered in order to improve the strength of the pellets.
  • the sintering can be carried out for instance in a conveyor-type furnace where hot gas is blown in the pellet bed in order to sinter the wet pellets.
  • the hot gas must be allowed to flow through the pellet bed in an essentially even fashion.
  • the pellet bed must be essentially even in thickness, so that the whole pellet bed is treated in a way that is advantageous for the sintering product.
  • Lumpy and essentially spherical material can be processed, in order to obtain a layer that is essentially even in thickness, for example by conveying the material on a conveyor which is articulated at one end, so that the free end of the conveyor moves along a spherical orbit, according to the width of a second conveyor located underneath the first conveyor.
  • This kind of combination requires a lot of space in the lengthwise direction, because the conveyors are arranged in succession.
  • the material can also be conveyed by moving back and forth a chain-operated conveyor provided with a crank lever mechanism, so that the material is fed in this conveyor at one end, and it drops further onto a transversal conveyor located underneath this first conveyor.
  • the drawback of a chain-operated conveyor is that the thickness of the material layer created on the lower conveyor can only be adjusted by changing the chain wheels. This in turn requires that the chain lengths are altered, and further that the conveyor transfer rate and stroke are adjusted.
  • the object of the present invention is to eliminate some of the drawbacks of the prior art and to achieve an improved apparatus for processing lumpy and essentially spherical material, wherein the lumpy material is applied on an essentially continuously moving surface in a layer that is advantageous both in thickness and in cross-section, so that the gases to be conducted through said layer in the further processing of the lumpy material are made to penetrate the layer in an essentially even fashion.
  • the apparatus for processing lumpy material is provided with an essentially continuously operated belt conveyor, which moves back and forth between two positions in relation to a second conveyor located underneath the first conveyor.
  • the opposite positions of the alternating motion are chosen so that the material discharged from the belt conveyor drops onto the conveyor surface of the second conveyor placed underneath the belt conveyor essentially along the whole width of the conveyor surface.
  • the alternating motion of the belt conveyor is created by a specific moving member connected to the conveyor, advantageously a hydraulic cylinder provided with a double piston.
  • Other corresponding members that are operated for instance electrically can likewise be employed as the moving members.
  • the speed of the moving member of the belt conveyor can be steplessly adjusted.
  • at least two limit switches whereby the speed of the alternating motion of the belt conveyor can be adjusted near the end of the trajectory of the belt conveyor.
  • the motion of the belt conveyor is advantageously slowed down by means of the limit switch located first in the proceeding direction.
  • the second limit switch in the proceeding direction is placed at the end of the trajectory, and by means of said second limit switch the motion of the belt conveyor is respectively made to speed up, when the belt conveyor starts moving from the end of the trajectory back towards the first limit switch.
  • the location of the first limit switch of the trajectory it is also possible to adjust the required delay times of the motion of the belt conveyor at both ends of the trajectory.
  • the speed of motion of the belt conveyor by adjusting the speed of motion of the belt conveyor, the quantity of material fed on the second conveyor located underneath the belt conveyor can also be adjusted in the transversal direction of the conveyor belt.
  • the belt of the belt conveyor is made to rotate so that the belt speed in relation to the quantity of the lumpy material fed thereon is essentially constant irrespective of the position and motional direction of the belt conveyor.
  • the motion of the belt in the belt conveyor is achieved by means of an electric motor or a hydraulic motor.
  • the belt speed of the belt conveyor is advantageously adjusted according to the motional speed, so that the belt conveyor feeds lumpy material onto the second conveyor placed below only when the belt conveyor is returning from that position on the belt conveyor trajectory that is located farthest with respect to the moving member of the belt conveyor.
  • the belt speed of the belt conveyor is advantageously the same as the motional speed of the belt conveyor, in which case the belt speed of the belt conveyor with respect to the belt conveyor proper is zero.
  • the belt conveyor now moves back from the position on the trajectory that is located farthest in relation to the moving member of the belt conveyor, the speed of the belt conveyor belt is doubled.
  • the belt conveyor there always is provided an essentially even layer of lumpy material, which essentially helps in the further processing of the lumpy material.
  • figure 1 shows a preferred embodiment of the invention in partial cross-section
  • figure 2 is a top-view illustration of the embodiment of figure 1.
  • the belt conveyor 1 is installed movably in the supporting structure 2, so that the belt conveyor 1 moves between the positions
  • the belt conveyor 1 includes a conveyor belt 9, which is made to move between the driving drum 10 and the bending drum 11 by means of a rotation motor 12 connected to the driving drum 10.
  • the belt conveyor 1 When the belt conveyor 1 is in operation, onto the belt conveyor 1 there is fed lumpy material 13 to be conveyed from the conveyor 14.
  • the conveyor belt 9 of the belt conveyor is made to rotate by means of the rotation motor 12.
  • the belt conveyor 1 is made to move between the positions 3 and 4, so that when moving from the position 3 located nearest to the belt conveyor moving member 5 towards the position 4 that is located farthest, the speed of the belt conveyor belt 9 is advantageously the same as the motional speed of the belt conveyor 1 , so that the belt speed of the belt conveyor 9 with respect to the belt conveyor 1 proper is zero.
  • the speed of the belt conveyor 1 begins to slow down, and material 13 begins to drop onto the conveyor 15 provided underneath the belt conveyor 1.
  • the motional direction of the belt conveyor 1 changes, and its speed begins to rise owing to the influence of the second limit switch 8, until the belt conveyor 1 reaches the first limit switch 8.
  • the speed of the belt conveyor 1 is set to be essentially constant, until the belt conveyor 1 reaches the first limit switch 8 located near the position 3.
  • this additional material helps to shape the material bed, so that at the edges it obtains a cross-section which advantageously conforms to a regular trapezoidal shape, because part of the excessive material 13 that is located at the edge rolls, along with the motion of the material, towards the edge of the conveyor surface and possibly drops out thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Manipulator (AREA)
  • Discharge Of Articles From Conveyors (AREA)
  • Photographic Processing Devices Using Wet Methods (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention relates to an apparatus for processing lumpy, essentially spherical material such as pellets, so that the lumpy material can be applied on a surface that is set in an essentially continuous motion, as an advantageous layer for the further processing of said material, said apparatus comprising means (1) for conveying the material and for feeding the material onto a surface (15) that is set in an essentially continuous motion. According to the invention, the conveyor (1) is installed movably in an alternating motion between two positions (3, 4) in order to feed the material conveyed by the conveyor (1) as a layer (16) that is advantageous both in thickness and in cross section onto a surface (15) set in an essentially continuous motion.

Description

APPARATUS FOR PROCESSING LUMPY MATERIAL
The present invention relates to an apparatus for processing lumpy and advantageously spherical material, such as pellets, so that the lumpy material can be applied on an essentially continuously moving surface to form a layer which is advantageous both in thickness and in cross-section, so that in the further processing of the lumpy material, the gas to be conducted through said layer can be made to penetrate the layer in an essentially homogeneous fashion.
Several smelting processes require that the material to be fed into smelting is not too finely divided. Therefore a finely ground material such as concentrate must first be pelletized and thereafter sintered in order to improve the strength of the pellets. The sintering can be carried out for instance in a conveyor-type furnace where hot gas is blown in the pellet bed in order to sinter the wet pellets. For obtaining a homogeneous sintering product, the hot gas must be allowed to flow through the pellet bed in an essentially even fashion. For creating an even gas flow, also the pellet bed must be essentially even in thickness, so that the whole pellet bed is treated in a way that is advantageous for the sintering product.
In the processing of lumpy, essentially spherical material, it is important to take into account the special feature of the material, i.e. its round surface, which makes the material move piece by piece. When this type of lumpy material should be applied as an essentially even layer, it easily happens that without special procedures the layer becomes very thick in the middle and becomes thinner towards the edges. In thickness, such a layer does not satisfy the requirements of an essentially even layer.
Lumpy and essentially spherical material can be processed, in order to obtain a layer that is essentially even in thickness, for example by conveying the material on a conveyor which is articulated at one end, so that the free end of the conveyor moves along a spherical orbit, according to the width of a second conveyor located underneath the first conveyor. This kind of combination requires a lot of space in the lengthwise direction, because the conveyors are arranged in succession. In order to obtain an even layer, the material can also be conveyed by moving back and forth a chain-operated conveyor provided with a crank lever mechanism, so that the material is fed in this conveyor at one end, and it drops further onto a transversal conveyor located underneath this first conveyor. The drawback of a chain-operated conveyor is that the thickness of the material layer created on the lower conveyor can only be adjusted by changing the chain wheels. This in turn requires that the chain lengths are altered, and further that the conveyor transfer rate and stroke are adjusted.
The object of the present invention is to eliminate some of the drawbacks of the prior art and to achieve an improved apparatus for processing lumpy and essentially spherical material, wherein the lumpy material is applied on an essentially continuously moving surface in a layer that is advantageous both in thickness and in cross-section, so that the gases to be conducted through said layer in the further processing of the lumpy material are made to penetrate the layer in an essentially even fashion. The essential novel features of the invention are apparent from the appended claims.
According to the invention, the apparatus for processing lumpy material is provided with an essentially continuously operated belt conveyor, which moves back and forth between two positions in relation to a second conveyor located underneath the first conveyor. The opposite positions of the alternating motion are chosen so that the material discharged from the belt conveyor drops onto the conveyor surface of the second conveyor placed underneath the belt conveyor essentially along the whole width of the conveyor surface. The alternating motion of the belt conveyor is created by a specific moving member connected to the conveyor, advantageously a hydraulic cylinder provided with a double piston. Other corresponding members that are operated for instance electrically can likewise be employed as the moving members.
According to the invention, the speed of the moving member of the belt conveyor can be steplessly adjusted. Moreover, on the trajectory of the moving member, advantageously near to both ends of the trajectory, there are provided, movably in the lengthwise direction of the trajectory, at least two limit switches whereby the speed of the alternating motion of the belt conveyor can be adjusted near the end of the trajectory of the belt conveyor. When approaching the end of the trajectory, the motion of the belt conveyor is advantageously slowed down by means of the limit switch located first in the proceeding direction. Now the second limit switch in the proceeding direction is placed at the end of the trajectory, and by means of said second limit switch the motion of the belt conveyor is respectively made to speed up, when the belt conveyor starts moving from the end of the trajectory back towards the first limit switch. By means of the location of the first limit switch of the trajectory, it is also possible to adjust the required delay times of the motion of the belt conveyor at both ends of the trajectory. Moreover, by adjusting the speed of motion of the belt conveyor, the quantity of material fed on the second conveyor located underneath the belt conveyor can also be adjusted in the transversal direction of the conveyor belt.
In the apparatus according to the invention, the belt of the belt conveyor is made to rotate so that the belt speed in relation to the quantity of the lumpy material fed thereon is essentially constant irrespective of the position and motional direction of the belt conveyor. The motion of the belt in the belt conveyor is achieved by means of an electric motor or a hydraulic motor. The belt speed of the belt conveyor is advantageously adjusted according to the motional speed, so that the belt conveyor feeds lumpy material onto the second conveyor placed below only when the belt conveyor is returning from that position on the belt conveyor trajectory that is located farthest with respect to the moving member of the belt conveyor. When the belt conveyor is moving from the position on the belt conveyor trajectory that is located nearest with respect to the moving member of the belt conveyor towards the position that is located farthest therefrom, the belt speed of the belt conveyor is advantageously the same as the motional speed of the belt conveyor, in which case the belt speed of the belt conveyor with respect to the belt conveyor proper is zero. When the belt conveyor now moves back from the position on the trajectory that is located farthest in relation to the moving member of the belt conveyor, the speed of the belt conveyor belt is doubled. As a result, on the belt conveyor there always is provided an essentially even layer of lumpy material, which essentially helps in the further processing of the lumpy material.
The invention is explained in more detail below, with reference to the appended drawing, where figure 1 shows a preferred embodiment of the invention in partial cross-section, and figure 2 is a top-view illustration of the embodiment of figure 1.
According to figures 1 and 2, the belt conveyor 1 is installed movably in the supporting structure 2, so that the belt conveyor 1 moves between the positions
3 and 4 in an essentially continuous operation. The locations of the positions 3 and 4 are determined so that the belt conveyor 1 is movable, with respect to the second conveyor 15 arranged underneath the first belt conveyor 1, essentially along the whole width of the conveyor surface of the conveyor 15. In order to move the belt conveyor 1, in the supporting frame 2 there is installed a hydraulic cylinder 5, and the piston rod 6 of said cylinder 5 is connected to the frame of the belt conveyor 1 by means of a connecting member 7. In order to slow down and respectively speed up the motion of the belt conveyor 1 , in the vicinity of the positions 3 and 4, in the trajectory of the belt conveyor 1, essentially near to the positions 3 and 4, there are provided limit switches 8.
Moreover, the belt conveyor 1 includes a conveyor belt 9, which is made to move between the driving drum 10 and the bending drum 11 by means of a rotation motor 12 connected to the driving drum 10.
When the belt conveyor 1 is in operation, onto the belt conveyor 1 there is fed lumpy material 13 to be conveyed from the conveyor 14. The conveyor belt 9 of the belt conveyor is made to rotate by means of the rotation motor 12. At the same time, the belt conveyor 1 is made to move between the positions 3 and 4, so that when moving from the position 3 located nearest to the belt conveyor moving member 5 towards the position 4 that is located farthest, the speed of the belt conveyor belt 9 is advantageously the same as the motional speed of the belt conveyor 1 , so that the belt speed of the belt conveyor 9 with respect to the belt conveyor 1 proper is zero. When the belt conveyor 1 reaches the first limit switch 8 in relation to the proceeding direction, and when it further proceeds towards the position 4, the speed of the belt conveyor 1 begins to slow down, and material 13 begins to drop onto the conveyor 15 provided underneath the belt conveyor 1. When the belt conveyor 1 reaches the position 4, the motional direction of the belt conveyor 1 changes, and its speed begins to rise owing to the influence of the second limit switch 8, until the belt conveyor 1 reaches the first limit switch 8. After passing the first limit switch 8, the speed of the belt conveyor 1 is set to be essentially constant, until the belt conveyor 1 reaches the first limit switch 8 located near the position 3.
When the belt conveyor 1 is returning from the position 4 that is located farthest from the belt conveyor moving member 5, the belt speed of the belt conveyor 9 between the first limit switches 8 is doubled in relation to the speed of the belt conveyor 1 , and the material 13 to be conveyed is dropped onto the conveyor 15. When the speed of the belt conveyor 1 is constant, the material dropped on the conveyor 15 forms a material bed 16 that is advantageous for further processing both in thickness and in cross-section. At the edges of the conveyor 15, between the limit switches 8 and the positions 3 and 4, there is dropped more material 13 than in the area between the limit switches 8. As the material moves further, this additional material helps to shape the material bed, so that at the edges it obtains a cross-section which advantageously conforms to a regular trapezoidal shape, because part of the excessive material 13 that is located at the edge rolls, along with the motion of the material, towards the edge of the conveyor surface and possibly drops out thereof.

Claims

1. An apparatus for processing lumpy and essentially spherical material, such as pellets, so that the lumpy material can be applied on a surface that is set in an essentially continuous motion, to form an advantageous layer for the further processing of said material, said apparatus comprising means (1) for conveying the material and for feeding the material onto a surface (15) that is set in an essentially continuous motion, characterized in that the conveyor (1) is installed movably in an alternating motion between two positions (3, 4) in order to feed the material conveyed by the conveyor (1) as a layer (16) that is advantageous both in thickness and in cross-section onto a surface (15) that is set in an essentially continuous motion.
2. An apparatus according to claim 1 , characterized in that the distance between the two positions (3, 4) of the conveyor is essentially as long as the surface (15) onto which the layer that is advantageous both in thickness and in cross-section is provided.
3. An apparatus according to claim 1 or 2, characterized in that on the trajectory of the conveyor (1), there are arranged at least two limit switches (8) in order to alter the motional speed of the conveyor in the vicinity of the positions (3, 4).
4. An apparatus according to claim 1, 2 or 3, characterized in that the motional speed of the conveyor (1) is adjustable, so that the belt speed of the belt conveyor (9), when approaching the positions (3, 4) in the motional direction between the first limit switches (8), is advantageously equal to the motional speed of the belt conveyor (1) when the belt conveyor moves from the position (3) that is located nearest to the moving member (5) towards the position (4) that is located farthest from the moving member (5).
5. An apparatus according to any of the preceding claims, characterized in that the belt conveyor moving member (5) is a hydraulic cylinder.
6. An apparatus according to any of the preceding claims 1 - 4, characterized in that the belt conveyor moving member (5) is electrically operated.
PCT/FI1997/000829 1996-12-30 1997-12-22 Apparatus for processing lumpy material WO1998029323A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR9713664-6A BR9713664A (en) 1996-12-30 1997-12-22 Apparatus for processing lumpy material
EP97948936A EP0963332B1 (en) 1996-12-30 1997-12-22 Apparatus for processing lumpy material
AT97948936T ATE213222T1 (en) 1996-12-30 1997-12-22 DEVICE FOR PROCESSING GRANULAR MATERIAL
US09/331,278 US6401908B1 (en) 1996-12-30 1997-12-22 Apparatus for processing lumpy material
DE69710499T DE69710499T2 (en) 1996-12-30 1997-12-22 DEVICE FOR PROCESSING GRANULAR MATERIALS
EA199900605A EA000823B1 (en) 1996-12-30 1997-12-22 Apparatus for processing lumpy material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI965254A FI104417B (en) 1996-12-30 1996-12-30 Device for handling piece-like material
FI965254 1996-12-30

Publications (1)

Publication Number Publication Date
WO1998029323A1 true WO1998029323A1 (en) 1998-07-09

Family

ID=8547369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000829 WO1998029323A1 (en) 1996-12-30 1997-12-22 Apparatus for processing lumpy material

Country Status (9)

Country Link
US (1) US6401908B1 (en)
EP (1) EP0963332B1 (en)
AT (1) ATE213222T1 (en)
BR (1) BR9713664A (en)
DE (1) DE69710499T2 (en)
EA (1) EA000823B1 (en)
FI (1) FI104417B (en)
WO (1) WO1998029323A1 (en)
ZA (1) ZA9711498B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105836494A (en) * 2016-05-27 2016-08-10 大唐环境产业集团股份有限公司 Belt type storage silo material scattering and distributing device
CN106185361A (en) * 2016-08-30 2016-12-07 山东华唐环保科技有限公司 A kind of coal dust storage bin unloading device

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FR2864880B1 (en) * 2004-01-14 2007-04-06 Clairefontaine Atel HARVESTING MACHINE OF GENUS PRODUCTS, IN PARTICULAR
CN106185278B (en) * 2016-08-30 2018-06-19 山东华唐环保科技有限公司 A kind of coal dust dosing device
CN108974855A (en) * 2018-06-19 2018-12-11 绵阳师范学院 A kind of material particles automatic material taking mechanism
CN110884916B (en) * 2019-12-11 2021-07-20 河南中烟工业有限责任公司 A even distributing device for pipe tobacco is carried driving
CN112207041A (en) * 2020-10-26 2021-01-12 江西才智重工机械有限公司 Automatic ore conveying device
CN113405348B (en) * 2021-08-19 2021-11-09 山东嘉信工业装备有限公司 Air energy microwave intelligent combined drying assembly line
CN113941502A (en) * 2021-10-13 2022-01-18 四川德胜集团钒钛有限公司 Finished product feed divider of extension sintering maintenance cycle
CN114132767B (en) * 2021-11-30 2022-09-02 唐山神州机械集团有限公司 Clean coal discharge port device for dry intelligent coal preparation system
CN115072339B (en) * 2022-07-28 2024-03-22 苏州威登智能科技有限公司 Automobile part production device with rapid diversion guiding function
CN118529447A (en) * 2024-07-05 2024-08-23 江苏银兴生物工程有限公司 Raw material conveying device for food processing

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FR2616421A1 (en) * 1987-06-15 1988-12-16 Bet B Roulon Rapid loading device, particularly for transferring objects between two transporters

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN105836494A (en) * 2016-05-27 2016-08-10 大唐环境产业集团股份有限公司 Belt type storage silo material scattering and distributing device
CN106185361A (en) * 2016-08-30 2016-12-07 山东华唐环保科技有限公司 A kind of coal dust storage bin unloading device
CN106185361B (en) * 2016-08-30 2018-06-19 山东华唐环保科技有限公司 A kind of coal dust storage bin unloading device

Also Published As

Publication number Publication date
EP0963332B1 (en) 2002-02-13
EA000823B1 (en) 2000-04-24
DE69710499D1 (en) 2002-03-21
ATE213222T1 (en) 2002-02-15
BR9713664A (en) 2000-04-04
FI965254A0 (en) 1996-12-30
EP0963332A1 (en) 1999-12-15
FI965254A (en) 1998-07-01
FI104417B (en) 2000-01-31
EA199900605A1 (en) 2000-02-28
US20020060130A1 (en) 2002-05-23
US6401908B1 (en) 2002-06-11
DE69710499T2 (en) 2002-09-05
ZA9711498B (en) 1998-06-24

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