Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/16—Details
  • B02C18/18—Knives; Mountings thereof
• • 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
  • B02C13/20—Disintegrating by mills having rotary beater elements ; Hammer mills with two or more co-operating rotors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C4/00—Crushing or disintegrating by roller mills
  • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
  • B02C2018/147—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers of the plural stage type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/16—Details
  • B02C18/18—Knives; Mountings thereof
  • B02C2018/188—Stationary counter-knives; Mountings thereof

Definitions

• the invention relates to a crusher comprising a box-like crusher frame, which includes two end walls and two side walls connecting the end walls; two adjacent crusher rotors, which are supported for rotary motion inside the crusher frame on the end walls thereof; whereby the circumferences of both crusher rotors comprise a plurality of crusher teeth, and the side walls of the crusher frame comprise counterblade structures cooperating with the crusher teeth of both crusher rotors, and material to be fed into the crusher is arranged for being crushed between the crusher teeth of the crusher rotors and the counterblade structures as the crusher rotors are rotated; a feed point for the material to be crushed in the upper part of the crusher frame; and screen sets underneath each crusher rotor, at a selected distance from the crusher rotor teeth and arranged to extend to a selected angular area of each crusher rotor for screening the material crushed to a given particle size out of the crusher.
• the material to be crushed i.e feed material, which has large dimensions or large particle size
• a slow speed tearing crusher This crusher equipped with coarse-teeth crusher rotors does not provide sufficiently small particle size in the end product, even though gripping in the feed material and the capacity are good.
• the object of the invention is to develop the crusher of the above-described type in such a manner that the aforementioned problems will be solved.
• a crusher according to the invention which is characterized in that one crusher rotor is for coarse crushing and another crusher rotor is for fine crushing, and the different crusher rotors are provided with crusher teeth of different sizes, and correspondingly, different counter- blade structures are provided with counterblades of different sizes, and that mesh sizes of screen sets beneath the crusher rotors are selected with the intention to produce a product in accordance with the requirement set for final particle size.
• the preferred embodiments of the invention are disclosed in the dependent claims.
• the invention is thus based on a combination of a coarse crusher and a fine crusher.
• the crushing of feed material is performed against counterblade structures locating on the side walls of the crusher frame, the rotors rotating towards the side walls.
• the rotors are rotated towards the centre only to break up emerging material arches, if any, or to remove overload.
• the particle size of the end product is determined by the screen sets beneath the rotors.
• the material to be crushed is fed on the side of the rotor having coarser cogging. Oversized material, which has not passed through the screen set beneath this particular rotor, rises from the middle of the rotors upwards and will be subjected to a similar crushing treatment with the rotor having finer cogging.
• a crusher of the invention including a box-like frame 1 with two end walls 2 (of which only the rearmost is visible) and two side walls 3 connecting the end walls 2.
• the crusher frame 1 Inside the crusher frame 1 , on its end walls 2 there are supported two adjacent crusher rotors 4 and 5, which are operated, i.e. rotated with conventional actuators, not shown.
• the material to be fed into the crusher i.e.
• feed material F is intended for being crushed between the crusher teeth 6 and 7 of the crusher rotors 4 and 5 and the counterblade structures 8 and 9 while the crusher rotors 4 and 5 are rotated in the direction of the arrows shown in the drawing.
• the feed point 12 of the feed material F to be crushed is located in the upper part of the crusher frame 1 .
• a first crusher rotor 4 is for coarse crushing and a second crusher rotor 5 is for fine crushing, and consequently these crusher rotors 4 and 5 are provided with crusher teeth 6 and 7 of different sizes, and correspondingly, different counterblade structures 8 and 9 are provided with counterblades of different sizes which are suitable for cooperation with the above-mentioned crusher teeth 6 and 7; and that mesh sizes in the screen sets 10 and 1 1 beneath each crusher rotor 4 and 5 are selected with the intention to produce a product in accordance with the requirement set for the final particle size.
• the feed point 12 of the material to be crushed i.e. the feed F, is thus located at and above the crusher rotor 4 for coarse crushing.
• the crushing of the feed material F is performed against the counterblade structures 8 and 9, the rotors 4 and 5 rotating towards the side walls 3.
• the rotors 4 and 5 are rotated towards the centre only to break up emerging material arches, if any, or to remove overload.
• the particle size in the end product is determined by the screen sets 10 and 1 1 . Oversized material, which has not passed through the screen set 10 beneath the rotor 4, rises from the middle of the rotors 4 and 5 upwards and will be subjected to a similar crushing treatment with the rotor 5 having finer cogging.
• the screen sets 10 and 1 1 extend from below the counterblade structures 8 and 9 to the area between the rotors 4 and 5, approximately to the height of the axles of the rotors 4 and 5, and they are connected to a shaped central beam 13 running between the rotors 4 and 5 and supported to the end walls 2 of the crusher frame 1 .
• Each crusher rotor 4 and 5 may be arranged to operate independently, their diameters may be substantially equal in size, or if so desired, different in size. Correspondingly, their rotating speeds may be either equal or different. Likewise, the mutual axle level of the crusher rotors 4 and 5 may be modified. All the above parameters are selected according to each particular feed material F and the desired end product thereof as well as according to the situation in question.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Crushing And Pulverization Processes (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43806497

Family Applications (1)

Country Status (5)

Cited By (3)

Families Citing this family (2)

Citations (3)

• 2011
  • 2011-03-25 FI FI20115288A patent/FI20115288L/fi not_active Application Discontinuation
• 2012
  • 2012-03-23 AT ATGM9003/2012U patent/AT14416U1/de not_active IP Right Cessation
  • 2012-03-23 CN CN201290000176.1U patent/CN203470076U/zh not_active Expired - Lifetime
  • 2012-03-23 WO PCT/FI2012/050294 patent/WO2012131162A1/en active Application Filing
  • 2012-03-23 DE DE201221000029 patent/DE212012000029U1/de not_active Expired - Lifetime
• 2013
  • 2013-09-19 FI FIU20134197U patent/FI10270U1/fi not_active IP Right Cessation

Patent Citations (3)

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