EP2604345B1 - Zerkleinerungsvorrichtung - Google Patents

Zerkleinerungsvorrichtung Download PDF

Info

Publication number
EP2604345B1
EP2604345B1 EP20110306685 EP11306685A EP2604345B1 EP 2604345 B1 EP2604345 B1 EP 2604345B1 EP 20110306685 EP20110306685 EP 20110306685 EP 11306685 A EP11306685 A EP 11306685A EP 2604345 B1 EP2604345 B1 EP 2604345B1
Authority
EP
European Patent Office
Prior art keywords
separator
grinder
grinding
inlet
gas
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.)
Not-in-force
Application number
EP20110306685
Other languages
English (en)
French (fr)
Other versions
EP2604345A1 (de
Inventor
Didier Dumont
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.)
Lafarge SA
Original Assignee
Lafarge SA
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
Priority to EP20110306685 priority Critical patent/EP2604345B1/de
Application filed by Lafarge SA filed Critical Lafarge SA
Priority to DK11306685T priority patent/DK2604345T3/da
Priority to CN201280061343.8A priority patent/CN103998136B/zh
Priority to CA2859455A priority patent/CA2859455C/en
Priority to JP2014546403A priority patent/JP2015501720A/ja
Priority to US14/365,041 priority patent/US9114401B2/en
Priority to EP12791794.6A priority patent/EP2790837B1/de
Priority to ES12791794T priority patent/ES2744251T3/es
Priority to PCT/EP2012/074029 priority patent/WO2013087421A1/en
Publication of EP2604345A1 publication Critical patent/EP2604345A1/de
Application granted granted Critical
Publication of EP2604345B1 publication Critical patent/EP2604345B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/001—Air flow directing means positioned on the periphery of the horizontally rotating milling surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B02C21/007—Disintegrating plant with or without drying of the material using a combination of two or more drum or tube mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier

Definitions

  • the present invention relates to the field of grinding, and in particular the grinding of raw materials used for the manufacture of hydraulic binders.
  • An example of a grinding installation is for example described by the document DE 42 24 704 .
  • This grinding plant comprises a first workshop with a first mill and a second workshop with a second mill and a separator common to both mills. In this installation the first mill is supplied with gas from the common separator.
  • the present invention relates to a grinding plant comprising a grinding equipment having particular characteristics, to a cement plant or to a grinding plant comprising this grinding equipment, to a use of this grinding equipment and to methods implementing this grinding equipment.
  • the fineness of a material can be characterized by a curve, called particle size curve, which represents the evolution of the volume percentage of the particles as a function of the average particle size.
  • a granulometric curve generally has a shape of the Gaussian curve type, that is to say a bell-shaped curve.
  • a grain size curve increases to a maximum volume percentage and then decreases.
  • a granulometric curve is more or less spread around the average particle size which corresponds to the maximum volume percentage.
  • a particle size curve is said to be centered when it is not spread out on either side of the average particle size which corresponds to the maximum volume percentage.
  • the spread of a grain size curve can for example be evaluated by the slope of Rosin Rammler (nRR).
  • the slope of Rosin Rammler can be determined by plotting a curve representing the logarithmic evolution of sieve rejection as a function of particle size. The curve obtained is almost a straight line. The slope of this line is the slope of Rosin Rammler.
  • a typical grain size curve has a Rosin Rammler slope of 0.8 to 1.1.
  • a Rosin Rammler slope greater than or equal to 1.2 would be more satisfactory.
  • the problem to be solved by the invention is to provide a new means for grinding at least one material, and in particular a material used for the manufacture of hydraulic binders, to obtain a ground material having a higher Rosin Rammler slope. or equal to 1.2, preferably the highest possible, and a Blaine specific surface greater than or equal to 7000 cm 2 / g.
  • the inventors have demonstrated that it is possible to use, for finer grinding a material, and in particular a material used for the manufacture of hydraulic binders, grinding equipment having particular characteristics and in particular comprising a separator fed by two different gas inlets, to obtain a ground material having a Blaine specific surface greater than or equal to 7000 cm 2 / g and a Rosin Rammler slope greater than or equal to 1.2.
  • This grinding equipment can be included in a grinding plant comprising a first and a second mill and a first and a second separator.
  • a separator comprises a fixed cylindrical chamber of vertical axis, in which are arranged a cage and blades.
  • the blades are arranged around the cage in a circle. They extend over the entire height of the cage.
  • the cage comprises blades secured between a solid bottom disk and a hollow top disk. Each blade is oriented radially and extends in a substantially vertical direction over the entire height of the cage.
  • the space between the blades of the cage and the blades is called the area of selection.
  • the space between the cylindrical chamber and the blades is called the gas supply zone and particles of a material to be separated.
  • a separator is traversed by a gas which allows in particular to transport the particles of a material to be separated.
  • the cage is a cylinder, having a height and a diameter, which turns on itself along its vertical axis.
  • the blades are fixed, that is to say they do not rotate around the vertical axis of the cage.
  • the blades are rotatable on themselves to adjust the speed of the gas relative to the rotational speed of the cage.
  • the gas that transports the material to be separated arrives from the bottom of the separator into the feed zone and rises vertically. It is deflected by the blades, so as to cross the selection zone and reach the blades of the cage in a radial motion, then resume its vertical upward movement in the center of the cage.
  • the radial velocity is the velocity of displacement, through the separation zone of the separator, of the gas used to transport the particles of the material to be separated.
  • the radial velocity is expressed in meters per second.
  • the radial velocity can be calculated according to a method known to those skilled in the art, knowing the height and the diameter of the cage (and therefore its exchange surface) and the flow rate of the gas.
  • the tangential velocity is the rotational speed at the periphery of the separator cage which transmits a centrifugal force to the particles of the material to be separated.
  • the tangential velocity is expressed in meters per second.
  • the tangential velocity can be calculated according to a method known to those skilled in the art, knowing the diameter of the cage and its rotational speed in revolutions per minute.
  • the invention has the advantage of being implemented in the building industry, cement industry, or grinding stations.
  • the invention relates to a grinding plant according to claim 1.
  • the first separator operates at a tangential velocity of 10 to 25 m / s and a radial velocity of 3.5 to 4.5 m / s.
  • the second separator operates at a tangential speed of 25 to 45 m / s and a radial velocity of 3 to 3.5 m / s.
  • the first grinder and the first separator are the grinding equipment according to the present invention.
  • the grinding plant according to the present invention comprises two workshops, which can be interconnected or separated by intermediate storage means. Both workshops may be on the same site or on separate sites. On the other hand, the two workshops of the grinding plant according to the present invention can operate simultaneously or deferred. They can operate at the same material flow rate or at different flow rates.
  • the first mill may be any known mill, for example a ball mill or a compression mill.
  • the second separator is preferably a third generation separator.
  • the plant according to the present invention is an installation capable of producing ultrafine materials at an industrial flow rate.
  • the invention also relates to a cement plant according to claim 2.
  • the invention also relates to a grinding mill according to claim 3.
  • the invention also relates to a use of a grinding plant according to the present invention to obtain a final ground material having a Rosin Rammler slope greater than or equal to 1.2.
  • the invention also relates to a method of grinding a raw material according to claim 5.
  • the present invention also relates to a method of manufacturing a hydraulic binder according to claim 7.
  • the grinding of step (i) is an operation during which the different materials are ground separately.
  • the grinding method according to the present invention is based on a separate grinding of the different materials so as to optimize grinding for each of the materials.
  • Known grinding processes are co-grinding processes, which pose particular problems in terms of management of the respective fineness of each material to be ground.
  • a mixture of two materials having different grindability does not make it possible to obtain a ground mixture with satisfactory fineness, or even optimum fineness, for each material. Indeed, the easiest material to grind can be ground more finely than desired, while the less grindable material can be ground more coarsely than desired.
  • a separate grinding may allow grinding to the desired fineness for each material.
  • a separate grinding can make it possible to produce custom compositions with a controlled nature, quantity and size of the different materials.
  • several grinding plants according to the present invention can be used on the same site to grind each material separately.
  • the present invention also relates to a hydraulic binder comprising materials obtained by grinding in a grinding plant according to the present invention.
  • the materials of the hydraulic binder according to the present invention have been obtained by separate grinding, i.e. they have each been ground separately, in a grinding plant which is preferably that according to the present invention.
  • the material to be ground is preferably a material useful for the manufacture of a hydraulic binder or a hydraulic composition.
  • the material to be ground is preferably a clinker, a hydraulic binder (for example a cement) or a mineral addition (for example a slag, a fly ash, a pozzolan or limestone).
  • a hydraulic binder for example a cement
  • a mineral addition for example a slag, a fly ash, a pozzolan or limestone.
  • a clinker is generally the product obtained after firing (the clinkerization) of a mixture (the raw material) comprising limestone and for example clay.
  • a hydraulic binder includes any compound that takes and cures by hydration reaction.
  • the hydraulic binder is a cement.
  • a cement generally comprises at least one clinker and calcium sulphate.
  • the clinker may in particular be a Portland clinker.
  • the mineral additions are generally, for example, fly ash (for example as defined in the standard "Cement” NF EN 197-1 of February 2001 paragraph 5.2.4 or as defined in the standard “Concrete” EN 450), pozzolanic materials (for example as defined in the "Cement” standard NF EN 197-1 of February 2001 paragraph 5.2.3), silica fumes (for example as defined in the "Cement” standard NF EN 197-1 of February 2001 paragraph 5.2.7 or as defined in the "Concrete” standard prEN 13263: 1998 or NF P 18-502), slags (for example as defined in the "Cement” standard NF EN 197-1 paragraph 5.2 .2 or as defined in the "Concrete” standard NF P 18-506), calcined schists (for example as defined in the "Cement” standard NF EN 197-1 of February 2001 section 5.2.5), additions limestones (for example as defined in the "Cement” standard NF EN 197-1 paragraph 5.2.6 or as defined in the "Concrete” standard
  • the fineness of the final ground material can be expressed in terms of Dv97, Dv80 or Blaine surface area.
  • the Dv97 (by volume) generally is the 97 th percentile of the distribution of particle size, that is to say that 97% of particles have a size less than or equal to the Dv97 and 3% larger than the Dv97.
  • the DV80 (by volume) generally is the 80 th percentile of the distribution of particle size, that is to say that 80% of particles have a size less than or equal to DV80 and 20% are larger at Dv80.
  • Dv97 and Dv80 can be determined by laser particle size for particles smaller than 200 ⁇ m, or by preliminary sieving for particles larger than 200 ⁇ m.
  • a laser granulometry apparatus generally comprises a prior treatment equipment of the material to be analyzed, which makes it possible to disaggregate the particles of the material.
  • the deagglomeration is made by ultrasound in a liquid way (for example in ethanol). When the particles have a tendency to agglomeration, it is recommended to vary the duration of the ultrasound to ensure dispersion or to change the nature of the dispersing liquid.
  • the Blaine surface area is determined according to EN 196-6 of August 1990, paragraph 4.
  • the Blaine surface area of the final ground material is preferably 7000 to 10000 cm 2 / g.
  • the Rosin Rammler slope of the final ground material is 1.2 to 1.6, more preferably 1.3 to 1.5.
  • the grinding plant and the method according to the present invention may for example make it possible to obtain the hydraulic binders as described in the French patent application no. 06/04398 , 07/06703 , 09/01364 and 11/50676 .
  • the different materials to be ground can be ground together or separately.
  • the different materials to be ground are ground separately.
  • the grinding plant includes a first workshop and a second workshop.
  • the first workshop comprises a first mill 11, a first separator 12 and a first filter 13.
  • the second workshop comprises a second mill 21, a second separator 22 and a second filter 23.
  • the first mill 11 is fed with material to be milled via a mill.
  • first conveyor means 31 An outlet of the first mill 11 is connected to an inlet of the first separator 12 by a second conveying means 32.
  • a first outlet of the first separator 12 is connected to an inlet of the first mill 11 by a third means of
  • a second output of the first separator 12 is connected to an input of the first filter 13 by a fourth conveying means 34.
  • An output of the first filter 13 is connected to an input of the second separator 22 by a fifth conveying means 35.
  • a first output of the second separator 22 is connected to an input of the second filter 23 by a sixth conveying means 36.
  • An output of the filter 23 is connected to a storage means 42 by a seventh conveying means 37.
  • a second output of the second separator 22 is connected to an input of the second mill 21 by an eighth conveying means 38.
  • An output of the second mill 21 is connected to the inlet of the second separator 22 by a ninth conveying means 39.
  • the conveyor means may be any known conveying means, and for example a conveyor belt, a worm or a truck.
  • the raw material is crushed in the first crusher 11 to provide a first milled material.
  • the first ground material is separated in the first separator 12 to provide a first fine fraction and a first coarse fraction.
  • the first coarse fraction is then milled in the first mill 11.
  • the first filter 13 is fed by the first fine fraction.
  • the filtering performed by the first filter 13 makes it possible to filter the transport gas from the first separator 12 to provide a first filtered fine fraction.
  • the first filtered fine fraction is separated in the second separator 22 to provide a second fine fraction and a second coarse fraction.
  • the second filter 23 is fed by the second fine fraction.
  • the filtering performed by the second filter 23 makes it possible to filter the transport gas from the second separator 22 to provide a second filtered fine fraction.
  • the second filtered fine fraction is stored in the storage means 42.
  • the second coarse fraction is milled in the second mill 21 to provide a second milled material.
  • the second milled material is separated in the second separator 22.
  • the grinding plant may further comprise a storage means 41, which may be a silo, located between the first filter 13 and the second separator 22.
  • the output of the first filter 13 is connected to an input of the means of storage 41 by a tenth conveying means 40.
  • An outlet of the storage means 41 is connected to the inlet of the second separator 22 by the fifth conveying means 35.
  • the filtered first fine fraction is stored in the storage means 41.
  • the fifth and / or the tenth conveying means 35, 40 is a truck.
  • the raw material to be ground may have a particle size of less than or equal to 50 mm.
  • the first filtered fine fraction provided by the first filter 13 may have a particle size of less than or equal to 80 ⁇ m, a Blaine specific surface area of about 3960 cm 2 / g and a Rosin Rammler slope of about 1.02.
  • the second filtered fine fraction provided by the second filter 23 may have a particle size of less than or equal to 20 ⁇ m, a Blaine specific surface area of about 8000 cm 2 / g and a Rosin Rammler slope of greater than or equal to 1.2. .
  • the flow rate of the first filtered fine fraction provided by the first filter 13 may be about 100 t / h.
  • the flow rate of the second filtered fine fraction supplied by the second filter 23 may be about 50 t / h.
  • the Figures 3 and 4 represent an exemplary embodiment of a grinding equipment according to the present invention.
  • the grinding equipment 1 comprises a mill 3 and a separator 5 connected to each other.
  • the mill 3 comprises an enclosure 45 in which is disposed a cylindrical milling table 2 of vertical axis, surrounded by a blowing ring 14 which comprises means for guiding the flow of gas in the vertical direction.
  • Rollers 10 are placed at the periphery of the table 2.
  • the axis of the rollers 10 is positioned radially relative to the table 2.
  • a cone 16 connects the mill 3 and the separator 5.
  • the mill 3 also comprises a first inlet of gas 7, located in the bottom of the mill 3 which opens into the blowing ring 14.
  • the blowing ring 14 is connected to the first gas inlet 7.
  • a material supply means to grind I can feed the grinder 3 of material to grind.
  • the separator 5 comprises a fixed enclosure 18 of vertical axis in which are arranged vertically a cage 9 and blades 17.
  • the blades 17 are arranged around the cage 9 in a circle. They extend over the entire height of the cage 9.
  • the cage 9 comprises blades 43 fixed between a solid lower disk and a hollow top disc 44. Each blade 43 is oriented radially and extends in a substantially vertical direction over any the height of the cage 9. The blades 43 do not meet at the center of the cage 9.
  • a selection zone 15 corresponds to the space between the cage 9 and the blades 17.
  • a feed zone 6 in gas and particles a material to be separated corresponds to the space between the cylindrical chamber 18 and the blades 17.
  • the chamber 45 of the mill 3 opens at its upper end in the feed zone 6 by a passage 46.
  • the separator comprises in addition to a second gas inlet 8.
  • the second gas inlet 8 is located at the chamber 18 of the separator 5.
  • the second gas inlet 8 can be in the form of flanged dampers, the position of which is adjustable to adjust the additional gas flow.
  • a conveying means II makes it possible to evacuate the final ground material from the separator 5.
  • the material to be ground is fed by the supply means I at the center of the table 2 of the mill 3.
  • the table 2 rotates about its axis during grinding.
  • the rotational speed of the table 2 of the mill 3 may be fixed or adjustable.
  • the material moves from the center of the table 2 towards the outside of the table 2.
  • the rollers 10 rotate on their horizontal axis.
  • the rollers 10 may have different shapes, for example cylindrical, toroidal or frustoconical shapes.
  • the rollers 10 exert pressure on the table 2 as they roll on the table 2 to grind the material to be ground.
  • the rollers 10 are pressurized by a hydraulic system (operating for example with oil).
  • the ground material arriving in the annular zone 14 is transported by the gas coming from the first inlet 7 of the end of the table 2 to the feed zone 6 of the separator 5 through the passage 46.
  • the total flow of gas in the feed zone 6 comprises two different gas flow rates: the flow of gas from the first inlet 7 from the mill 3 and an additional gas flow from the second inlet 8 from outside air inlets located at the level of the separator 5.
  • the cage 9 rotates about its vertical axis D in the direction indicated by the arrow 19. This rotation creates a tangential speed represented by the arrow 20.
  • the blades 17 are fixed, that is to say they do not rotate around the vertical axis D of the cage 9.
  • the blades 17 are rotatable on themselves to adjust the speed of the gas relative to the rotation speed of the cage 9.
  • the gas mixture from the first inlet 7 and the second inlet 8, which carries the particles of the material to be separated, arrives from the bottom of the separator and rises substantially vertically in the feed zone 6. It is deflected by the blades 17, so as to pass through the selection zone 15 and reach the blades 43 of the cage 9 in a substantially radial movement, that is to say in the direction of the vertical axis D.
  • the gas escapes in an upward movement by an opening substantially in the center of the cage 9 which are t generally connected to a suction means (not shown).
  • the particles entrained by the gas reach the cage 9 with a radial velocity represented by the arrow 30.
  • the additional gas flow from the second inlet 8 makes it possible to adjust the total gas flow rate in the supply zone 6 and therefore the gas flow rate in the selection zone 15.
  • This total gas flow including the gas flow rate from the first inlet 7 and the additional gas flow from the second inlet 8 induces the radial velocity.
  • the tangential velocity is fixed by the speed of rotation of the cage 9 of the separator 5.
  • the combination of the radial and tangential velocities defines the cutting mesh and the fineness of the final ground material. Sufficiently small particles are driven by the gas and then rise substantially vertically with the gas. Too large particles fall into the selection zone 15 under the action of gravity. The too large particles falling in the selection zone 15 are recovered in the cone 16, which sends the too large particles onto the table 2 of the mill 3. The fine particles are directed towards the conveying means II of the final crushed material, which is generally connected to a suction means and a storage means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Disintegrating Or Milling (AREA)

Claims (8)

  1. Zerkleinerungsanlage, umfassend:
    • ein erstes Atelier, umfassend einen ersten Zerkleinerer (11) und einen ersten Separator (12), wobei ein Ausgang des Zerkleinerers (11) mit einem Eingang des ersten Separators (12) verbunden ist;
    • ein zweites Atelier, umfassend einen zweiten Separator (22) und einen zweiten Zerkleinerer (21), wobei ein Ausgang des zweiten Separators (22) mit einem Eingang des zweiten Zerkleinerers (21) verbunden ist;
    wobei der zweite Separator (22) mit dem Material, das aus dem ersten Separator (12) kommt, gespeist wird;
    wobei das zweite Atelier eine Zerkleinerungsausrüstung (1) ist, umfassend einen Kompressionszerkleinerer (3) und einen Separator (5), wobei ein Ausgang des Separators (5) mit einem Eingang des Zerkleinerers (3) verbunden ist, wobei der Separator (5) mit Gas gespeist wird über:
    • einen ersten Gaseintritt (7), der sich auf Höhe des Zerkleinerers (3) befindet, wobei das von dem ersten Gaseintritt (7) kommende Gas zuerst durch den Zerkleinerer (3) und dann durch den Separator (5) strömt;
    • einen zweiten Gaseintritt (8), der sich auf Höhe des Separators (5) befindet, wobei das von dem zweiten Gaseintritt (8) kommende Gas nur durch den Separator (5) strömt und sich mit dem Gas, das von dem ersten Gaseintritt (7) kommt, vermischt, nachdem es den Zerkleinerer (3) durchströmt hat;
    wobei der erste Separator (12) dazu geeignet ist, mit einer Tangentialgeschwindigkeit von 15 bis 25 m/s und einer Radialgeschwindigkeit von 3,5 bis 5 m/s zu funktionieren; und
    wobei der zweite Separator (22) dazu geeignet ist, mit einer Tangentialgeschwindigkeit von 20 bis 50 m/s und einer Radialgeschwindigkeit von 2,5 bis 4 m/s zu funktionieren.
  2. Zementwerk, umfassend eine Zerkleinerungsanlage nach Anspruch 1, die mit einem Eingang eines Zementofens verbunden ist.
  3. Zerkleinerungsatelier, umfassend eine Zerkleinerungsanlage nach Anspruch 1, die mit einem Eingang eines Lagermittels verbunden ist.
  4. Verwendung einer Zerkleinerungsanlage nach Anspruch 1, um ein endzerkleinertes Material mit einer Rosin Rammler-Verteilung größer oder gleich 1,2 zu erhalten.
  5. Verfahren zur Zerkleinerung eines Rohmaterials in einer Zerkleinerungsanlage, umfassend:
    • ein erstes Atelier, umfassend einen ersten Zerkleinerer (11) und einen ersten Separator (12), wobei ein Ausgang des ersten Zerkleinerers (11) mit einem Eingang des ersten Separators (12) verbunden ist;
    • ein zweites Atelier, umfassend einen zweiten Separator (22) und einen zweiten Zerkleinerer (21), wobei ein Ausgang des zweiten Separators (22) mit einem Eingang des zweiten Zerkleinerers (21) verbunden ist;
    wobei der zweite Separator (22) mit dem Material, das aus dem ersten Separator (12) kommt, gespeist wird;
    wobei das zweite Atelier eine Zerkleinerungsausrüstung (1) ist, umfassend einen Kompressionszerkleinerer (3) und einen Separator (5), wobei ein Ausgang des Separators (5) mit einem Eingang des Zerkleinerers (3) verbunden ist, wobei der Separator (5) mit Gas gespeist wird über:
    • einen ersten Gaseintritt (7), der sich auf Höhe des Zerkleinerers (3) befindet, wobei das von dem ersten Gaseintritt (7) kommende Gas zuerst durch den Zerkleinerer (3) und dann durch den Separator (5) strömt;
    • einen zweiten Gaseintritt (8), der sich auf Höhe des Separators (5) befindet, wobei das von dem zweiten Gaseintritt (8) kommende Gas nur durch den Separator (5) strömt und sich mit dem Gas, das von dem ersten Gaseintritt (7) kommt, vermischt, nachdem es den Zerkleinerer (3) durchströmt hat;
    wobei der erste Separator (12) dazu geeignet ist, mit einer Tangentialgeschwindigkeit von 15 bis 25 m/s und einer Radialgeschwindigkeit von 3,5 bis 5 m/s zu funktionieren; und
    wobei der zweite Separator (22) dazu geeignet ist, mit einer Tangentialgeschwindigkeit von 20 bis 50 m/s und einer Radialgeschwindigkeit von 2,5 bis 4 m/s zu funktionieren.
  6. Zerkleinerungsverfahren nach Anspruch 5, umfassend die folgenden Schritte:
    a) Zerkleinerung des zu zerkleinernden Rohmaterials in dem ersten Zerkleinerer (11) um ein erstes zerkleinertes Material zu liefern;
    b) Abtrennung des ersten zerkleinerten Materials in dem ersten Separator (12), um eine erste feine Fraktion und eine erste grobe Fraktion zu liefern;
    c) Rezirkulation der ersten groben Fraktion zum ersten Zerkleinerer (11);
    d) Abtrennung der ersten feinen Fraktion in dem zweiten Separator (22), um eine zweite feine Fraktion und eine zweite grobe Fraktion zu liefern;
    e) Lagern der zweiten feinen Fraktion in einem Lagermittel (42);
    f) Zerkleinern der zweiten groben Fraktion in dem zweiten Zerkleinerer (21), um ein zweites zerkleinertes Material zu liefern;
    g) Abtrennung des zweiten zerkleinerten Materials in dem zweiten Separator (22).
  7. Verfahren zur Herstellung eines hydraulischen Bindemittels, umfassend die folgenden Schritte:
    (i) Zerkleinerung mindestens zweier Materialien in einer Zerkleinerungsanlage nach Anspruch 1;
    (ii)Mischen der in Schritt (i) erhaltenen Materialien mit möglichen anderen zerkleinerten oder nicht zerkleinerten Materialien.
  8. Verfahren nach Anspruch 7, bei dem die Zerkleinerung aus Schritt (i) ein Vorgang ist, bei dem die Materialien getrennt zerkleinert werden.
EP20110306685 2011-12-16 2011-12-16 Zerkleinerungsvorrichtung Not-in-force EP2604345B1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DK11306685T DK2604345T3 (da) 2011-12-16 2011-12-16 Formalingsudstyr
EP20110306685 EP2604345B1 (de) 2011-12-16 2011-12-16 Zerkleinerungsvorrichtung
CA2859455A CA2859455C (en) 2011-12-16 2012-11-30 Grinding process and unit, and corresponding production process of a hydraulic binder
JP2014546403A JP2015501720A (ja) 2011-12-16 2012-11-30 粉砕方法、粉砕設備及び関連する水硬性結合剤の製造方法
CN201280061343.8A CN103998136B (zh) 2011-12-16 2012-11-30 研磨方法和单元和相应的水硬性粘合剂的制备方法
US14/365,041 US9114401B2 (en) 2011-12-16 2012-11-30 Grinding process and unit, and corresponding production process of a hydraulic binder
EP12791794.6A EP2790837B1 (de) 2011-12-16 2012-11-30 Zerkleinerungsvorrichtung und verfahren zur herstellung hydraulischer binder
ES12791794T ES2744251T3 (es) 2011-12-16 2012-11-30 Procedimiento y unidad de molienda, y procedimiento de producción correspondiente de un aglutinante hidráulico
PCT/EP2012/074029 WO2013087421A1 (en) 2011-12-16 2012-11-30 Grinding process and unit, and corresponding production process of a hydraulic binder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110306685 EP2604345B1 (de) 2011-12-16 2011-12-16 Zerkleinerungsvorrichtung

Publications (2)

Publication Number Publication Date
EP2604345A1 EP2604345A1 (de) 2013-06-19
EP2604345B1 true EP2604345B1 (de) 2014-07-30

Family

ID=45478188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110306685 Not-in-force EP2604345B1 (de) 2011-12-16 2011-12-16 Zerkleinerungsvorrichtung

Country Status (2)

Country Link
EP (1) EP2604345B1 (de)
DK (1) DK2604345T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110369046B (zh) * 2019-07-10 2021-02-05 宁波可可磁业股份有限公司 一种钕铁硼气流磨机的回料设备
CN110342839A (zh) * 2019-07-11 2019-10-18 杭州中禄新材料有限公司 一种水泥生产加工工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL34608C (de) 1929-11-30
FR604398A (fr) 1925-10-10 1926-05-03 Outil Mathiaux Et Cie Soc D Chemise de mandrins pour vilebrequins
FR901364A (fr) 1943-09-08 1945-07-25 élément d'adhérence pour chaînes antipatinantes
DE1144620B (de) 1955-02-07 1963-02-28 Helmut Bross Dipl Ing Mechanik fuer Kugelschreiber
US4597537A (en) * 1982-09-14 1986-07-01 Onoda Cement Company, Ltd. Vertical mill
DE4124416A1 (de) * 1991-07-23 1993-01-28 Krupp Polysius Ag Einrichtung und verfahren zur zerkleinerung von mahlgut unterschiedlicher koernung
DE4224704C2 (de) * 1992-07-25 2002-01-31 Kloeckner Humboldt Wedag Verfahren und Anlage zur Zerkleinerung von Mahlgut
DE10050332C2 (de) * 2000-10-11 2003-11-27 Loesche Gmbh Verfahren und Vorrichtung zur Präparierung von Brennstoffen

Also Published As

Publication number Publication date
EP2604345A1 (de) 2013-06-19
DK2604345T3 (da) 2014-09-08

Similar Documents

Publication Publication Date Title
JP5576510B2 (ja) 金属回収のためのステンレス鋼スラグおよび鉄鋼スラグの精製方法
CN103998136B (zh) 研磨方法和单元和相应的水硬性粘合剂的制备方法
JP2012076961A (ja) 砕砂、砕石生産システム
EP2604345B1 (de) Zerkleinerungsvorrichtung
JP7358598B2 (ja) ミル
JP5264846B2 (ja) 砕石および砕砂の製造プラントおよび製造方法
EP2106294B1 (de) Korngrössenwahl und/oder materialtrocknungsvorrichtung
CN110090719B (zh) 一种粒径分级装置及系统
EP2604346B1 (de) Zerkleinerungsanlage
JPWO2003066220A1 (ja) 粉砕方法
EP2718028A2 (de) Dynamischer abscheider für pulverförmige materialien
EP2566625B1 (de) Verfahren und vorrichtung zur zerkleinerung von erzmaterial enthaltend mindestens calcium und metallische verunreinigungen
KR100507705B1 (ko) 모래제조장치
JP2755338B2 (ja) 粉砕設備
FR2670135A1 (fr) Procede de broyage de matieres cassantes comportant pour la mise en óoeuvre du procede une desagglomeration selective et installation.
RU2472593C1 (ru) Устройство для сухого обогащения минерального сырья
JP6331700B2 (ja) 竪型粉砕機
JPH05285455A (ja) 砕砂ダスト除去装置
JP5810542B2 (ja) バイオマスミル
JP2709673B2 (ja) 砕砂ダスト除去装置
JP3211420B2 (ja) 分級装置
JP3805131B2 (ja) 砕砂製造用竪型粉砕機の運転方法
FR2906735A1 (fr) Dispositif de broyage de materiaux mineraux.
JP2707021B2 (ja) 砕砂ダスト除去装置
JPH05285411A (ja) 砕砂ダスト除去装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

17P Request for examination filed

Effective date: 20131219

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20140313

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 679683

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140815

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

Effective date: 20140902

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602011008705

Country of ref document: DE

Effective date: 20140911

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20140730

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141031

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141030

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141030

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141202

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141130

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602011008705

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141231

26N No opposition filed

Effective date: 20150504

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20141216

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141216

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141231

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20111216

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20151216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151216

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

REG Reference to a national code

Ref country code: AT

Ref legal event code: PC

Ref document number: 679683

Country of ref document: AT

Kind code of ref document: T

Owner name: HOLCIM TECHNOLOGY LTD, CH

Effective date: 20180730

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 602011008705

Country of ref document: DE

Owner name: HOLCIM TECHNOLOGY LTD., CH

Free format text: FORMER OWNER: LAFARGE, PARIS, FR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20140730

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20191226

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20191029

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20191231

Year of fee payment: 9

Ref country code: DK

Payment date: 20191230

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602011008705

Country of ref document: DE

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

Effective date: 20201231

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 679683

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201216

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201231