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
  • B02C4/00—Crushing or disintegrating by roller mills
  • B02C4/10—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member
  • B02C4/12—Crushing or disintegrating by roller mills with a roller co-operating with a stationary member in the form of a plate

Definitions

• the invention relates to a single-roll crusher for comminuting solid bodies with a rotatably mounted, rotationally driven roller and with an associated rocker as crushing tools, at least the surface of the roller facing the rocker being profiled, the profiling being arranged by ribs and between them Grooves is formed, is at least partially inclined to the direction of the relative movement between roller and rocker.
• a roller mill is known from EP 0 563 564 A2.
• the known roller mill for comminuting brittle regrind has two oppositely rotating grinding rollers which are pressed against one another at high pressure and each have a roller jacket made of wear-resistant chilled cast iron with surface profiles. So that the rolls have a particularly good pull-in capacity and a high wear resistance, profiles in the form of welding beads made of wear-resistant build-up welding material are applied to the surface of the roll shell.
• the invention is based on the object of specifying a single-roll crusher of the type mentioned at the outset which is particularly suitable for fine comminution and with which, with good use of the energy, predominantly comminuted material having a grain shape is obtained which is approximately cubic or spherical, that is to say no length extension particularly pronounced in one direction Has.
• this is achieved in that the profiling of the roller and, if applicable, that of the rocker is formed by bodies made of hard material inserted therein and that the roller consists of a plurality of disks arranged side by side in the axial direction, each disk having ribs and grooves on its circumference to form the Has profiling.
• the desired effect is achieved because of the particularly structured At least on the surface of the roller, which is one of the two tools effecting the comminution, such an interaction arises that not only does a movement of the solid particles to be comminuted occur perpendicular to the moving roller, but also a movement component occurs perpendicular to the direction of movement of the relative movement.
• the movement component is achieved by structuring (profiling) the surface of the roller and preferably also that of the rocker arm. This movement component transversely to the direction of movement of the roller leads to the rolling movement of the grains in the crushing chamber and thus to a rounding thereof. This substantially improves the grain shape in the direction of cubicity and thus avoids the disadvantage of the known comminuting device mentioned above.
• the angle of the profiling to the direction of the relative movement between the roller and the rocker can be selected depending on the properties of the material to be shredded and can be determined taking into account the other operating conditions of the single-roll crusher. It is preferred in the context of the invention that the profiling of the roller and / or that of the rocker is divided into sections with the opposite orientation to the direction of the relative movement between roller and rocker. It can be provided that the profiling in the different sections includes the same, but opposite angles with the direction of the relative movement between roller and rocker. In certain applications, an embodiment has proven itself in which the profiling in the different sections includes angles of different sizes and opposite angles with the direction of the relative movement between roller and rocker.
• the profiling of the roller and, if appropriate, that of the rocker can be seen in a zigzag or serpentine shape transverse to the direction of the relative movement between the roller and the rocker.
• Fig. 3 in plan view a tool body of the rocker (seen essentially from the axis of the roller) and
• a comminution device which is intended in particular for the fine comminution of minerals (rock) and is designed as a single-roll crusher consists of a rotatably driven and rotatably driven roller 1 about an axis 3 and a rocker 2 assigned to the outer circumference of the roller 1, for example is pivotally mounted in the frame of the comminution device by a hydraulic drive and is loaded firmly or resiliently (resiliently) onto the roller 1.
• Ribs 5 are provided on the outer circumference of the roller 1 and are provided between these grooves 6.
• the ribs 5 and the grooves 6 can be evenly distributed on the roller 1 (over the circumference).
• the roller 1 is composed of several disks 4, each of which carries a section of the ribs 5 and the grooves 6 on its outer circumference.
• the ribs 5 and the grooves 6 can also run such that they have areas in which they run parallel to the direction of the relative movement (arrow 10) between the roller 1 and the rocker 2.
• the ribs 5 and the grooves 6 can also run in a serpentine manner.
• the tool bodies 11 inserted into the rocker 2 also have a structuring on their active surface facing the roller 1, which is composed of ribs or cutting edges 13 and grooves 14 arranged between them.
• the sections 15 and 16 in which the ribs
• roller 14 can in the direction of the axis of rotation 3 of the roller 1, i.e. seen transversely to the direction of the relative movement (arrow 10) between roller 1 and rocker 2 have the same width as the sections 7 and 8 of the ribs 5 on the roller 1.
• the ribs 5 and the grooves 6 of the roller 1 are wider than the ribs 13 and the grooves 14 on the rocker arm 2.
• the ribs 13 and the grooves 14 can also be arranged unevenly distributed.
• the ribs 13 and the grooves 14 can also run so that they have areas in which they run parallel to the relative movement between the roller 1 and the rocker 2.
• curved ribs 5 and 13 are also advantageous. In certain applications, an uneven distribution of the ribs 5 and grooves 6 on the roller 1 and / or the ribs 13 and the grooves 14 on the rocker 2 can bring better results.
• the ribs 5 and the ribs 13 are formed in that strips made of hard material are inserted into the disks 4 of the roller 1 and into the rocker 2 or the tool body 11 thereof. It is possible to form the various structural elements (ie the ribs 5 or 13 on the one hand and the carrier material on the other hand) from different materials, so that there is a self-resharpening effect.
• angles ⁇ and ⁇ are chosen depending on the properties of the material to be shredded.
• an angle ⁇ of the order of 10 to 40 ° has proven successful.
• the angles ⁇ of the ribs 13 on the tool bodies 11 of the rocker arm 2 are, for example, 40 to 80 °.
• angles ⁇ of the order of 10 to 40 ° are preferred for the crushing of rocks, the best results being achieved at 15 to 30 ° in most cases.
• the angles ⁇ can be in the range from 40 to 80 °, preferably from 50 to 70 °.
• the height H1 of the ribs 5 of the roller 1 and the pitch T1, the height H2 of the ribs 13 and the pitch T2 T3 of the ribs 13 are selected depending on the material to be cut and on the desired product grain belt.
• flank angles ⁇ l and ⁇ 2 are also determined according to these parameters and can, for example, have values from -25 ° to + 25 °.
• the flank angles ⁇ l and ⁇ 2 are variable.
• the gap "S" between the roller 1 and the rocker 2 can be adjusted, if necessary, since it is also decisive for the achievable product grain belt.
• the invention can be represented as follows, for example:
• a comminution device designed as a single-roll crusher with a rotationally driven roller 1 and a rocker arm 2 assigned to it has a profiling on the mutually facing surfaces of the roller 1 and rocker arm 2.
• the profiles formed by ribs 5, 13 are inclined to the direction (arrow 10) of the relative movement between roller 1 and rocker 2, so that in addition to the radial movement component, there is an axial movement component which promotes the cubicity of the grain shape of the reduction products.

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

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3511762

Family Applications (1)

Country Status (13)

Cited By (1)

Citations (3)

Family Cites Families (2)

• 1994
  • 1994-07-06 AT AT0133994A patent/AT400817B/de not_active IP Right Cessation
• 1995
  • 1995-07-04 CA CA002194409A patent/CA2194409A1/en not_active Abandoned
  • 1995-07-04 WO PCT/AT1995/000143 patent/WO1996001147A1/de active IP Right Grant
  • 1995-07-04 CZ CZ199730A patent/CZ291425B6/cs not_active IP Right Cessation
  • 1995-07-04 EP EP95923117A patent/EP0766601B1/de not_active Expired - Lifetime
  • 1995-07-04 HU HU9700008A patent/HU214897B/hu not_active IP Right Cessation
  • 1995-07-04 SI SI9520082A patent/SI9520082A/sl not_active IP Right Cessation
  • 1995-07-04 ES ES95923117T patent/ES2125021T3/es not_active Expired - Lifetime
  • 1995-07-04 DE DE59503860T patent/DE59503860D1/de not_active Expired - Fee Related
  • 1995-07-04 AU AU27794/95A patent/AU2779495A/en not_active Abandoned
  • 1995-07-04 PL PL95318042A patent/PL177698B1/pl not_active IP Right Cessation
• 1997
  • 1997-01-02 NO NO970006A patent/NO970006L/no not_active Application Discontinuation
  • 1997-01-03 FI FI970025A patent/FI970025A/fi unknown

Patent Citations (3)

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