EP0740961A1 - Zentrifugalbrecher sowie verstärkungsmaterial eines füllstutzens für das zu zerkleinernde rohmaterial - Google Patents

Zentrifugalbrecher sowie verstärkungsmaterial eines füllstutzens für das zu zerkleinernde rohmaterial Download PDF

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Publication number
EP0740961A1
EP0740961A1 EP95902278A EP95902278A EP0740961A1 EP 0740961 A1 EP0740961 A1 EP 0740961A1 EP 95902278 A EP95902278 A EP 95902278A EP 95902278 A EP95902278 A EP 95902278A EP 0740961 A1 EP0740961 A1 EP 0740961A1
Authority
EP
European Patent Office
Prior art keywords
reinforcing material
supply port
rotor
crusher
raw material
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.)
Ceased
Application number
EP95902278A
Other languages
English (en)
French (fr)
Other versions
EP0740961A4 (de
Inventor
Tosiyuki Kotobuki Eng. & Man. Co. Ltd. KIHARA
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.)
Kotobuki Engineering and Manufacturing Co Ltd
Original Assignee
Kotobuki Engineering and Manufacturing Co Ltd
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 Kotobuki Engineering and Manufacturing Co Ltd filed Critical Kotobuki Engineering and Manufacturing Co Ltd
Publication of EP0740961A1 publication Critical patent/EP0740961A1/de
Publication of EP0740961A4 publication Critical patent/EP0740961A4/de
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C13/1835—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/18—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor
    • B02C13/1807—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate
    • B02C2013/1885—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor the material to be crushed being thrown against an anvil or impact plate of dead bed type

Definitions

  • the invention relates to a centrifugal crusher comprising a crushing chamber formed inside a crusher housing, an impact material set around the periphery of the crushing chamber, a rotor positioned in the center of the crushing chamber that rotates in a horizontal plane and expels raw material from its peripheral ports to the impact material, a supply path through which raw material is fed into the rotor, and a reinforcing material for the supply port thereof.
  • Fig. 4 illustrates a conventional centrifugal crusher used for crushing mineral ores and similar materials.
  • the crushing chamber 11 is formed by the interior of a housing 1, which is a shell of the crusher.
  • a high-speed rotor 2 rotating in a horizontal plane, is positioned in the center of the crushing chamber.
  • Ores or other material to be crushed (hereinafter referred to as raw material) is fed into the rotor 2, wherein the centrifugal force generated by the whirling of the rotor discharges the material radially from the expulsion ports 21 at the peripheral face of the rotor.
  • the expelled material impacts on and is crushed by a dead bed 12, formed by crushed pieces of the material which has piled in a ring inside the crushing chamber 11, or a steel anvil or other means not shown in the drawing.
  • Fig. 5 illustrates the configuration of a feed channel through which the raw material is fed into the rotor 2 of a centrifugal crusher of the type described above.
  • a box-shaped or other type of chute 3, provided for receiving the raw material, is erected on the top of and in the center of a roof 13 of the crushing chamber.
  • a supply port 14 is opened through the roof 13 in the center of the chute 3, and another supply port 23 is opened through a circular plate 22 at the upper part of the rotor, and a supply pipe 4 passes through both ports.
  • the upper end of the supply pipe 4 is sealed to the upper face of the roof 13 by a flange 41, and the bottom end of the supply pipe is inserted into the supply port 23.
  • Raw material being fed from the top of the chute 3 forms a dead bed around the periphery of the chute 3, and also passes through the supply pipe 4 into the rotor 2.
  • the invention provides a centrifugal crusher and a reinforcing material for the rim of the supply port thereof, in which the diameter of the feed channel can be expanded in order to increase the feed volume, thereby improving the crushing efficiency. Further, the design prevents wear-and-tear of the rim of the supply port of the rotor caused by the repellent action of the material, thereby extending the life time of the rotor.
  • the invention is based on the concept that the conventional supply pipe is separated into an upper and a lower component, wherein a lower reinforcing material is fitted directly onto the rim of the rotor supply port. This eliminates the need to leave a gap between the rotor supply port and the supply pipe as in a conventional crusher. Hence, the diameter of the feed channel for the raw material can be widened by an amount which is equivalent to this gap, thereby increasing the feed volume and improving the crushing efficiency.
  • the lower reinforcing material is tube-shaped, and its upper end is in close proximity to the upper reinforcing material, in which case the gap between the upper and lower components is small enough to prevent powdered and tiny pieces of raw material to be blown out from the rotor and to be dispersed outside through the gap. This reduces malfunctions in the crusher caused by crushed debris plugging the area between the roof and the upper face of the rotor.
  • the inner face of the upper reinforcing material is sloping to gradually widen from the bottom to the top, which directs raw material to fall along the outside edges most distant from the center of the rotor. This effectively pares and prevents a bulge from being formed in the dead bed, and enables a constant volume of raw material to be fed to the rotor.
  • the inner face of the lower reinforcing material is sloping to gradually widen from the top to the bottom, which directs the raw material, as it bounces and scatters, to fall down the outside edges most distant from the center of the rotor. This again pares and prevents a bulge from being formed in the dead bed, and enables a constant volume of the raw material to be fed to the rotor. Since the raw material fans out as it is fed to the rotor, the feed volume is increased.
  • the reinforcing material is divided into a separate upper and lower component, wherein the upper component is ring-shaped and of short length. This facilitates the removal of the crusher head in order to inspect the crushing chamber, since the crusher head need only be raised very slightly and slide sideways.
  • a supply port 14 and a supply port 23 are opened through a roof 13 of a crushing chamber into a chute 3, and through the center of a round plate 22 at the upper part of a rotor, respectively.
  • the supply ports 14 and 23 are positioned such that their central axes coincide.
  • the diameters of the supply ports 14 and 23 are bored to be only marginally larger than the external diameter of an inlay collar component of reinforcing materials, to be described later, and are configured in such a manner that the inlay collar can fit inside the rim.
  • the dimensions of the diameters of the supply ports 14 and 23 are preset so as to obtain the required feed channel diameter for a given thickness of the inlay collar.
  • a ring-shaped upper reinforcing material 5 and a tube-shaped lower reinforcing material 6 are fitted into the rims of the supply port 14 and the supply port 23, respectively.
  • the reinforcing materials 5 and 6 can be made of a special high-chromium steel or other abrasion-resistant material.
  • the upper reinforcing material 5 is configured by an inlay collar 51 and a flange 52, wherein the external diameter of the inlay collar 51 is only minimally smaller than the diameter of the supply port 14 such that it can be fitted into the port.
  • the flange 52 molded to be larger than the diameter of the supply port 14, is sealed to the roof 13, and configured in such a maner that the upper reinforcing material 5 can be anchored.
  • the anchoring of the upper reinforcing material 5 and the lower reinforcing material 6, to be described later, can be achieved by tightening with bolts or by other methods which will enable the reinforcing materials to be removed and replaced when eroded.
  • the lower reinforcing material 6 is configured by an inlay collar 61, a flange 62 and a neck 63, wherein the inlay collar 61 and the flange 62 are configured in the same manner as the upper reinforcing material 5.
  • the neck 63 is of a height such that its upper end is in close proximity to the upper reinforcing material 5.
  • the inner spaces of the reinforcing materials 5 and 6 form feed channels 53a and 64, respectively, for the raw material. Since a gap need not be left between the reinforcing material and the rim of the supply port 23, the diameter of the feed channel 64 can be larger than the feed tube used conventionally, thereby increasing the feed volume of the raw material.
  • the diameter of the feed channel 53a is molded to be slightly smaller than the diameter of the feed channel 64. Otherwise, if the diameters of the two feed channels 53a and 64 are the same, small pieces of raw material would become caught in the gap between the bottom face of the upper reinforcing material 5 and the upper face of the lower reinforcing material 6.
  • the head of the crusher above the roof 13 of the crushing chamber is configured so as to be separable from the main body thereof.
  • the roof 13 is configured to be a separate unit detachable from side walls 15 of the crushing chamber 11, wherein the roof 13 and the side walls 15 are joined by an anchoring device 16.
  • anchoring devices can be used; for example, one end of a pin 16a is supported axially by the side wall 15, and a fastening jig 16b is affixed to the other end thereof.
  • the pin 16a is inserted into a notch 17 bored into the edge of the roof 13, wherein the upper face of the roof 13 is affixed by tightening the fastening jig 16b.
  • the elements as described above comprise the unique features of the centrifugal crusher according to this invention, and the rest of the structure is the same as in a conventional crusher.
  • a rotor 2 In order to operate the crusher, a rotor 2 is rotated, and raw material is fed into the chute 3.
  • the raw material so introduced first piles up around the periphery of the chute 3 forming a dead bed 31. Subsequently, the raw material passes through the upper reinforcing material 5 and the lower reinforcing material 6, is fed into the rotor 2, then expelled towards the dead bed around the periphery of the rotor 2 where it is crushed.
  • the crusher head can be removed to inspect the crushing chamber.
  • the anchoring device 16 is loosened and the pin 16a is dropped to disconnect the roof 13 from the side walls 15.
  • the crusher head is raised slightly and slid sideways away from the crushing chamber.
  • Example 1 the inner face of the upper reinforcing material 5 is upright and of constant diameter, but as shown in Fig. 3 according to Example 2, an inner face 54 of the upper reinforcing material 5 is sloping to gradually widen from the bottom to the top to form the feed channel.
  • Example 1 the lower reinforcing material is tube-shaped
  • a ring-shaped lower reinforcing material 7, as shown in Fig. 3, can also be used.
  • the reinforcing material 7 is configured by an inlay collar 71 and a flange 72.
  • the external diameter of the inlay collar 71 is made to be minimally smaller than that of the supply port 23, and the flange 72 is molded to be mountable onto and of a diameter larger than the supply port 23, and is sealed to the upper circular plate 22 of the rotor 2.
  • the inner face of the lower reinforcing material 7 is sloping to gradually widen from the top to the bottom, and the inner space formed therein becomes a feed channel 74 for the raw material. Since there is no need to leave a gap between the reinforcing material and the rim of the supply port 23, the diameter of the feed channel 74 can be larger than the feed tube used conventionally, thereby increasing the feed volume of the raw material.
  • the diameter of the feed channel of the upper reinforcing material 5 is molded to be slightly smaller than the diameter of the feed channel 74 of the lower reinforcing material 7. Otherwise, if the diameters of the two feed channels are the same, raw material passing through the upper reinforcing material 5 would strike against the inner edge of the flange 72 of the lower reinforcing material 7 and would be cast outside.
  • pieces of raw material being fed into the rotor form a dead bed 8 with an edge parallel to the partition of the rotor 2. If the humidity is high, the dead bed 8 will become sticky, in which case a bulge 81 could be formed at the center of the rotor 2, thereby reducing the feed volume of the raw material, or plugging the rotor 2. However, since the inner surface 54 of the upper reinforcing material 5 gradually widens from the bottom to the top, the raw material flows along the dead bed 31 and the inner surface 54, then falls along the outer edges most distant from the center of the rotor 2.
  • the dead bed 31 will be formed up to the corner "a" in the drawing, in which case the raw material will fall towards the center of the rotor 2. Also, if the inner face of the lower reinforcing material 7 is upright, then although the raw material will be bumping together, it will not fan out, and will again be fed towards the center of the rotor 2. Hence, in both cases the formation of a bulge 81 in the dead bed 8 cannot be prevented. Moreover, the narrow feed channel will reduce the feed volume of the raw material.
  • Example 3 the inner face of the upper reinforcing material 5 having a configuration as in Example 1 can slope to gradually widen from the bottom to the top as in Example 2. Also, the inner face of the tube-shaped lower reinforcing material 6 of Example 1 can slope to gradually widen from the top to the bottom as in Example 2.
  • the inner diameters of the upper reinforcing material 5 and the lower reinforcing material 7 having the configuration of Example 2 can, instead of being widened as in Example 2, be of constant diameter from top to bottom.
  • the invention relates to a centrifugal crusher and a reinforcing material for the raw material supply port thereof which crusher can be used for the crushing of mineral ores and similar raw material.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
EP95902278A 1994-11-28 1994-11-30 Zentrifugalbrecher sowie verstärkungsmaterial eines füllstutzens für das zu zerkleinernde rohmaterial Ceased EP0740961A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP317590/94 1994-11-28
JP6317590A JP2936382B2 (ja) 1994-11-28 1994-11-28 遠心破砕機及び破砕原料供給口の補強材
PCT/JP1994/002013 WO1996016740A1 (fr) 1994-11-28 1994-11-30 Machine centrifuge de concassage, et element de renforcement pour orifice d'alimentation en materiau brut a concasser

Publications (2)

Publication Number Publication Date
EP0740961A1 true EP0740961A1 (de) 1996-11-06
EP0740961A4 EP0740961A4 (de) 1998-08-12

Family

ID=18089930

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EP95902278A Ceased EP0740961A4 (de) 1994-11-28 1994-11-30 Zentrifugalbrecher sowie verstärkungsmaterial eines füllstutzens für das zu zerkleinernde rohmaterial

Country Status (4)

Country Link
EP (1) EP0740961A4 (de)
JP (1) JP2936382B2 (de)
AU (1) AU1119795A (de)
WO (1) WO1996016740A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0835690A1 (de) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Verfahren und Vorrichtung zum synchronisierten Prallzerkleinern von Material
WO2013127508A1 (en) 2012-02-29 2013-09-06 Dichter Ingrid Crusher housing with controlled particle traffic
EP2666543A1 (de) * 2012-05-23 2013-11-27 Sandvik Intellectual Property AB Zufuhrrohr für Zerkleinerer mit vertikalem Welleneinschlag

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6776613B2 (ja) * 2016-05-17 2020-10-28 株式会社サタケ 粉砕機
CN108906227B (zh) * 2018-07-05 2023-09-19 福建南方路面机械股份有限公司 一种立轴式破碎机及其破碎方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578254A (en) * 1968-09-23 1971-05-11 Bruce V Wood Impact crusher
GB1283961A (en) * 1969-04-19 1972-08-02 Bardon Hill Quarries London Lt Improvements in or relating to apparatus for breaking up materials, particularly stone and stone-like material
EP0233812A2 (de) * 1986-02-10 1987-08-26 Framatome Schleuderrad für unter Vakuum arbeitenden Prallbrecher
EP0515177A1 (de) * 1991-05-22 1992-11-25 Crm/Ccm Engineering, Inc. Wirksame Zentrifugalprallbrecher mit Entstaubungsmöchlichkeit und Verfahren zu seiner Verwendung
JPH0585445U (ja) * 1992-04-24 1993-11-19 コトブキ技研工業株式会社 遠心破砕機ロ−タ内への原料供給路の構造
JP3000057U (ja) * 1994-01-07 1994-07-26 コトブキ技研工業株式会社 遠心破砕機ロ−タ内への原料供給路の構造

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132741U (de) * 1986-02-18 1987-08-21

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578254A (en) * 1968-09-23 1971-05-11 Bruce V Wood Impact crusher
GB1283961A (en) * 1969-04-19 1972-08-02 Bardon Hill Quarries London Lt Improvements in or relating to apparatus for breaking up materials, particularly stone and stone-like material
EP0233812A2 (de) * 1986-02-10 1987-08-26 Framatome Schleuderrad für unter Vakuum arbeitenden Prallbrecher
EP0515177A1 (de) * 1991-05-22 1992-11-25 Crm/Ccm Engineering, Inc. Wirksame Zentrifugalprallbrecher mit Entstaubungsmöchlichkeit und Verfahren zu seiner Verwendung
JPH0585445U (ja) * 1992-04-24 1993-11-19 コトブキ技研工業株式会社 遠心破砕機ロ−タ内への原料供給路の構造
JP3000057U (ja) * 1994-01-07 1994-07-26 コトブキ技研工業株式会社 遠心破砕機ロ−タ内への原料供給路の構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9616740A1 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0835690A1 (de) 1996-10-11 1998-04-15 Van der Zanden, Johannes Petrus Andreas Josephus Verfahren und Vorrichtung zum synchronisierten Prallzerkleinern von Material
WO2013127508A1 (en) 2012-02-29 2013-09-06 Dichter Ingrid Crusher housing with controlled particle traffic
EP2666543A1 (de) * 2012-05-23 2013-11-27 Sandvik Intellectual Property AB Zufuhrrohr für Zerkleinerer mit vertikalem Welleneinschlag
WO2013174773A1 (en) * 2012-05-23 2013-11-28 Sandvik Intellectual Property Ab Vertical shaft impact crusher feed tube
CN104321144A (zh) * 2012-05-23 2015-01-28 山特维克知识产权股份有限公司 立轴冲击式破碎机进给管
US9550187B2 (en) 2012-05-23 2017-01-24 Sandvik Intellectual Property Ab Vertical shaft impact crusher feed tube

Also Published As

Publication number Publication date
JPH08141419A (ja) 1996-06-04
EP0740961A4 (de) 1998-08-12
JP2936382B2 (ja) 1999-08-23
AU1119795A (en) 1996-06-19
WO1996016740A1 (fr) 1996-06-06

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