EP4598682A2 - Broyeur de matières en vrac pour la préparation de matières grossières - Google Patents

Broyeur de matières en vrac pour la préparation de matières grossières

Info

Publication number
EP4598682A2
EP4598682A2 EP23783904.8A EP23783904A EP4598682A2 EP 4598682 A2 EP4598682 A2 EP 4598682A2 EP 23783904 A EP23783904 A EP 23783904A EP 4598682 A2 EP4598682 A2 EP 4598682A2
Authority
EP
European Patent Office
Prior art keywords
grinding
bulk material
processing
phase
discharged
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.)
Pending
Application number
EP23783904.8A
Other languages
German (de)
English (en)
Inventor
Caroline Woywadt
York Reichardt
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.)
Gebr Pfeiffer SE
Original Assignee
Gebr Pfeiffer SE
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 Gebr Pfeiffer SE filed Critical Gebr Pfeiffer SE
Publication of EP4598682A2 publication Critical patent/EP4598682A2/fr
Pending legal-status Critical Current

Links

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
    • 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
    • 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
    • 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 a method for processing a bulk material in a processing plant, a processing plant for processing bulk material and the use of a processing plant with a mill and classifier for dedusting ore.
  • Grinding and separating devices are a frequently used means of grinding and processing raw materials.
  • a starting material is fed into the grinding device and crushed into different fractions, for example fractions of different grain sizes.
  • the different grain sizes are then separated in a separation device.
  • Fractions that are sufficiently finely ground are discharged from the grinding and separating device in the form of fines.
  • Coarse fractions with grain sizes that are too large are rejected by the separation device and usually fed back to the grinding device, where they are ground again and thus further crushed. This cycle is repeated until finally all of the fed starting material is discharged from the grinding and separating device in the form of fines.
  • some of the coarse material rejected by the separation device can be discharged and thus no longer fed to the grinding device.
  • the productivity of the grinding and separating device can be increased, for example.
  • the coarse material discharged is usually disposed of or returned to the grinding device at a later time.
  • the fine material discharged has the desired, sufficiently fine grain size and is then used for subsequent purposes.
  • EP 3 326 720 B1 discloses a method for processing multi-phase mineral raw materials.
  • a raw material added to a mill is crushed using grinding rollers.
  • the ground raw material is then separated into fines and coarse material in a sifter.
  • the fine material is discharged from the plant.
  • Part of the coarse material rejected by the sifter is discharged from the mill.
  • the remaining coarse material is fed back to the grinding rollers and further crushed until it is finally discharged from the plant in the form of fines.
  • grain size is understood to mean the size of individual particles, also called grains.
  • the term particles is used in the present application as Used synonymously for grain. If the particles were perfect spheres, the grain size would be a measure of the respective sphere diameter. However, since the particles are usually not perfectly spherical but have different shapes, the grain size can be interpreted as an equivalent diameter.
  • the object of the present invention is to efficiently and precisely separate undesirable substances and grain sizes from ground material and to remove them from a processing plant. This object is achieved by a method for processing a bulk material according to claim 1, a processing plant for processing bulk material according to claim 12 or a use of a processing plant for dedusting ore according to claim 14.
  • a method according to the present invention for processing a bulk material in a processing plant comprises feeding bulk material into a grinding and separating device, grinding the bulk material in a grinding device to form ground material, separating the ground material in a separating device into fine material and coarse material, discharging the fine material from the grinding and separating device and discharging at least part of the coarse material from the grinding and separating device.
  • the part of the coarse material discharged from the grinding and separating device is at least 65 percent by mass of the bulk material fed in.
  • the part of the coarse material discharged can be fed to a subsequent use.
  • the grinding and separating device comprises the grinding device and the separating device.
  • the separation of the ground material can also be referred to as sifting, classifying or sorting.
  • the discharged fines can be disposed of or sent to a landfill or one or more separate processing stages.
  • the fines can be sent to a separate fines processing plant.
  • the fines can be used as filler.
  • the bulk material fed in can have at least a first phase and a second phase.
  • the coarse material can have a higher proportion of the first phase than the bulk material fed in.
  • the coarse material can have a higher proportion of the first phase than the fine material.
  • the fine material can have a higher proportion of the second phase than the coarse material.
  • the fine material can have a higher proportion of the second phase than the bulk material fed in.
  • the bulk material fed can be a solid with different phases.
  • the bulk material fed can be a raw material with several mineral phases.
  • the bulk material fed can be a composite material, for example concrete or a Composite plastic.
  • the bulk material fed in can be in one piece or in the form of several solid bodies.
  • the first phase and the second phase can be connected to each other in the bulk material.
  • the first phase and the second phase can be present loosely in the bulk material.
  • the first phase and the second phase may comprise particles.
  • the particles of the first phase may have, on average, a larger grain size than the particles of the second phase.
  • the particles of the first phase may, on average, have a higher density than the particles of the second phase.
  • the particles of the first phase may, on average, have a larger grain size and a higher density than the particles of the second phase.
  • the first phase and the second phase can have different grindabilities.
  • the second phase can have better grindability than the first phase.
  • the second phase can be crushed faster and/or into smaller particles, i.e. into particles with a smaller grain size.
  • the second phase can be enriched in the fines by the separation device due to its grain size.
  • the first phase can be enriched in the coarses by the separation device due to its grain size.
  • the first phase can contain the same material as the second phase.
  • the first phase can consist of the same material as the second phase.
  • the first phase and the second phase can be largely identical, so that they only differ from each other in the grain size.
  • the first phase may contain a different material than the second phase.
  • the maximum grain size of the particles in the fine material can be 0.1 millimeters, preferably 0.05 millimeters, preferably 0.01 millimeters, preferably 0.005 millimeters.
  • the maximum grain size can only represent a theoretical limit. In practice, the separation into fine material and coarse material is also influenced by other factors, such as the density and/or the shape of the particles, so that particles with a larger grain size than the maximum grain size are sometimes enriched in the fine material.
  • the maximum grain size can therefore represent a grain size limit below which 90 mass percent, in particular 95 mass percent, preferably 99 mass percent of the particles in the fine material fall.
  • the second phase can have a grain size that is not preferred for further processing, in particular non-preferred grain sizes.
  • This non-preferred grain size or grain sizes can be discharged from the grinding and separating device as fines.
  • the first phase can be arranged at least partially, in particular completely, within the second phase.
  • the second phase can be arranged partially, in particular completely, within the first phase.
  • the first phase can be arranged at least partially connected to the second phase.
  • the particles of the bulk material fed in can be made up of the first phase and the second phase.
  • the bulk material fed in can also have other phases.
  • the first phase and the second phase can be at least partially separated from one another.
  • the first phase and the second phase can be at least partially separated from one another and from the other phases.
  • the particles of the first phase and/or the particles of the second phase can be crushed.
  • the discharged portion of the coarse material may amount to at least 70 percent by mass, in particular at least 75 percent by mass, in particular at least 85 percent by mass, preferably at least 95 percent by mass of the bulk material fed in.
  • the discharged fine material may amount to a maximum of 35 percent by mass, in particular a maximum of 25 percent by mass, in particular a maximum of 15 percent by mass, preferably a maximum of 10 percent by mass, preferably a maximum of 5 percent by mass of the bulk material fed in.
  • the discharged fine material can amount to at least 1 percent by mass, in particular at least 2 percent by mass, in particular at least 3 percent by mass, in particular at least 5 percent by mass, in particular at least 10 percent by mass of the bulk material fed in.
  • the grinding and separating device can comprise a grinding device and a separating device.
  • the grinding device can be a mill, in particular a vertical mill.
  • the separating device can be a sifter, in particular a rotary sifter.
  • the grinding and separating device can be a mill-sifter combination.
  • the separation device can separate the material into fines and coarse materials.
  • the fine materials can be discharged from the grinding and separation device.
  • the ground material rejected by the separation device the so-called coarse material, can be discharged separately from the grinding and separation device. Parts of the coarse material rejected by the separation device can also be fed back into the grinding device.
  • the sifter in particular the rotary sifter, can have an adjustable speed.
  • the sifter can be driven by a motor.
  • a control unit can control the motor and thus the speed of the sifter, in particular control it continuously.
  • the discharged fine material can be controlled via the speed of the classifier.
  • a grain size distribution in the fine material can be controlled via the speed of the classifier or at least be able to be influenced.
  • the density distribution in the fine material can be controlled or at least influenced by the speed of the sifter.
  • the proportion of the bulk material fed in that is discharged as fine material can be controlled by the speed of the sifter.
  • a theoretical maximum value for the grain size in the fine material can be set by the speed of the sifter.
  • a theoretical maximum value for the density in the fine material can be set by the speed of the sifter.
  • the discharged coarse material can be controlled via the speed of the sifter.
  • a grain size distribution in the coarse material can be controlled via the speed of the sifter.
  • a density distribution in the coarse material can be controlled via the speed of the sifter.
  • the proportion of the bulk material discharged as coarse material can be controlled via the speed of the sifter.
  • a theoretical minimum value of the grain size in the coarse material can be set via the speed of the sifter.
  • a theoretical minimum value of the density in the coarse material can be set via the speed of the sifter
  • a preferred limit value for the grain size in the fine material can be set via the speed of the classifier.
  • the person skilled in the art is aware that this grain size limit value does not necessarily represent a 100 percent sharp limit.
  • the fine material discharged is generally influenced not only by its grain size, but also, for example, its density and/or shape.
  • the adjustable preferred grain size limit value can therefore be interpreted as a quantile value.
  • a significant proportion, for example at least 90 percent by mass, preferably at least 95 percent by mass, preferably at least 99 percent by mass, of the fine material discharged can have grain sizes smaller than or equal to the set preferred limit value.
  • a significant proportion, for example at least 90 percent by mass, preferably at least 95 percent by mass, preferably at least 99 percent by mass of the coarse material rejected by the classifier can have grain sizes larger than the set preferred grain size limit value.
  • a preferred limit value for the density in the fine material can be set via the speed of the classifier.
  • the person skilled in the art is aware that this limit value for the density does not necessarily represent a 100 percent sharp limit, because the discharged fine material is influenced not only by its density, but also, for example, by its grain size and/or shape.
  • the adjustable preferred limit value for the density can therefore be regarded as a quantile value.
  • a significant proportion, for example at least 90 percent by mass, preferably at least 95 percent by mass, preferably at least 99 percent by mass, of the discharged fine material can have densities less than or equal to the set preferred limit value.
  • a significant proportion, for example at least 90 percent by mass, preferably at least 95 percent by mass, preferably At least 99 percent by mass of the coarse material rejected by the classifier can have densities greater than the set preferred density limit.
  • the bulk material fed in can consist primarily of ore, in particular metal ore, preferably iron ore.
  • the bulk material fed in can have a proportion of ore of at least 10 percent by mass, preferably at least 30 percent by mass, preferably at least 50 percent by mass.
  • the bulk material fed in can have a proportion of metal ore of at least 10 percent by mass, preferably at least 30 percent by mass, preferably at least 50 percent by mass.
  • the bulk material fed in can have a proportion of iron ore of at least 10 percent by mass, preferably at least 30 percent by mass, preferably at least 50 percent by mass.
  • the metal content in the metal ore can be at least 0.1 mass percent, preferably at least 1 mass percent, preferably at least 5 mass percent of the metal ore.
  • the iron content in the iron ore can be at least 1 mass percent, preferably at least 10 mass percent, preferably at least 30 mass percent, preferably at least 50 mass percent of the iron ore.
  • the bulk material fed in can consist primarily of concrete, in particular old concrete or recycled concrete.
  • the bulk material fed in can have a concrete content of at least 10 percent by mass, preferably at least 30 percent by mass, preferably at least 50 percent by mass.
  • the concrete fed in as bulk material can contain cement paste, hydrated cement or set cement and aggregate.
  • cement paste is used to represent cement paste, hydrated cement and set cement.
  • the cement paste and the aggregate can be separated from each other in the grinding device.
  • the cement paste contained in the fed concrete can have better grindability than the aggregate contained in the fed concrete.
  • the cement paste contained in the fed concrete can mostly be discharged as fines.
  • the aggregate contained in the fed concrete can mostly be discharged as coarse material.
  • the method can be a method for ore processing, in particular metal ore processing, in particular iron ore processing.
  • Metal ore can be a mixture of rock and metal.
  • the metal can generally be present as a metal compound in the metal ore.
  • the term metal compound also includes all sulfidic and oxidic compounds.
  • Iron ore can be a mixture of rock and iron.
  • the iron can generally be present as an iron compound in the iron ore.
  • Metal contained in metal ore can be separated from rock contained in metal ore by the grinding device.
  • the rock can have a better grindability than the metal.
  • the rock can have an average smaller grain size than the metal.
  • the rock can be at least partially in the form of dust. Due to the smaller grain size, the rock can be specifically enriched in the fine material using the separation device and removed as such. Due to the larger grain size, the metal can be specifically enriched in the coarse material and removed as such. This selective enrichment allows metal and rock to be separated efficiently and precisely.
  • Iron contained in iron ore can be separated from rock contained in iron ore by the grinding device.
  • the rock can be more grindable than the iron.
  • the rock can have an average smaller grain size than the iron.
  • the rock can be at least partially in the form of dust. Due to the smaller grain size, the rock can be specifically enriched in the fine material using the separation device and then discharged as such. Due to the larger grain size, the iron can be specifically enriched in the coarse material and then discharged as such. This selective enrichment allows iron and rock to be separated efficiently and precisely.
  • the process can be a process for processing old concrete or recycled concrete. In the following, only the term old concrete will be used to represent old concrete or recycled concrete.
  • the process can be a process for recycling old concrete.
  • the process can be a process for processing and recycling old concrete.
  • the processing and recycling of raw materials, particularly concrete has become increasingly important in recent years due to ecological and economic aspects.
  • Concrete can contain different aggregates, also known as gravel or sand, which are bound together by cement stone.
  • the aggregates present in the concrete can be separated from the cement stone in the grinding device.
  • the cement stone can be easier to grind than the aggregates.
  • the cement stone can be present as cement stone dust.
  • the cement paste dust can be enriched in the fines by the separation device and thus separated from the aggregate.
  • the aggregate can be enriched in the coarse material by the separation device.
  • the process may be a process for the processing of clay in connection with clay calcination.
  • the process may be a process for the processing of slags, in particular metallurgical slags.
  • the coarse material can be rejected by the separating device in the direction of the grinding device.
  • the coarse material can be guided by the separating device into a semolina cone.
  • the rejected coarse material can be conveyed to the grinding device.
  • the semolina cone can guide the rejected coarse material to the grinding device.
  • the separating device can be arranged vertically above the grinding device.
  • the rejected coarse material can be conveyed back in the direction of the grinding device by means of gravity.
  • the discharge of at least part of the coarse material from the grinding and separation device can take place between the separation device and the grinding device.
  • the discharge of at least part of the coarse material from the grinding and separation device can take place via a conveyor screw.
  • the coarse material rejected by the separation device can fall onto the conveyor screw due to gravity.
  • the semolina cone can guide the rejected coarse material at least in part onto the separation device, in particular the conveyor screw.
  • the discharge of at least part of the coarse material from the grinding and separation device can take place via a chute.
  • the discharge of at least part of the coarse material from the grinding and separation device can take place via a chute with subsequent air exclusion.
  • the discharge of at least part of the coarse material from the grinding and separation device can take place via an air conveyor trough.
  • the discharge of at least part of the coarse material from the grinding and separating device can take place via an air conveyor trough with subsequent air isolation.
  • All coarse material rejected by the separation device can be discharged from the grinding and separation device.
  • the discharged coarse material can be fed to a second separation device.
  • the second separation device can divide the discharged coarse material into at least two fractions, in particular at least three fractions, with different grain sizes.
  • the second separation device can be, for example, a screening device or a second sifter.
  • the cement stone contained in the concrete can be largely discharged as fines.
  • the aggregate contained in the concrete can be largely discharged as coarse material and fed to the second separation device.
  • the discharged aggregate can be divided into aggregates of different grain sizes in the second separation device.
  • the discharged aggregate can be divided into sand and gravel, for example, in the second separation device.
  • the separation device can be arranged above the grinding device. The discharge of at least part of the coarse material can take place between the separation device and the grinding device.
  • the grinding and separating device can comprise a grinding device and a first separation device.
  • the grinding device can be designed to grind a bulk material fed into the grinding and separating device into ground material.
  • the first separation device can be designed to separate the ground material into fine material and coarse material.
  • the first discharge device can be designed to discharge the fine material from the grinding and separating device.
  • the second discharge device can be designed to discharge at least part of the coarse material from the grinding and separating device.
  • the processing plant further comprises a second separation device.
  • the second separation device can be designed to separate the discharged coarse material into at least a first fraction and a second fraction.
  • Particles in the first fraction can have an average smaller grain size than particles in the second fraction.
  • the second separation device can be designed to separate the discharged coarse material into at least a first fraction, a second fraction and a third fraction.
  • the second separation device can be designed to separate the discharged coarse material into at least a first fraction, a second fraction, a third fraction and a fourth fraction.
  • the fractions can have different average grain sizes.
  • the processing plant can alternatively be designed without a second separation device.
  • the processing plant can have a control system that is designed to control the processing plant so that the part of the coarse material discharged via the second discharge device is at least 65 percent by mass of the bulk material fed in.
  • the control system can be designed to be purely control-oriented or to carry out regulation based on a measured value.
  • the measured value can be indicative of the relative or absolute amount of the part of the coarse material discharged.
  • the measured value can, for example, reflect the mass flow of the part of the coarse material discharged.
  • the grinding and separating device can be a mill-classifier combination.
  • the grinding device can be a mill, in particular a vertical mill.
  • the mill can comprise several grinding rollers.
  • the mill can comprise a grinding table.
  • the second separation device can be directly downstream of the second discharge device.
  • the first discharge device can be higher than the first Separation device can be arranged.
  • the first discharge device can be arranged vertically above the first separation device.
  • the ground material can be transported from the grinding device to the first separation device by means of a process gas flow, in particular heated air.
  • the first discharge device can be an air duct.
  • the fine material can be transported from the first discharge device, in particular by means of a process gas flow, to a filter or a cyclone. In the filter or the cyclone, the fine material can be filtered out of the process gas flow and collected. The process gas flow can then be fed back to the grinding and separation device.
  • the second discharge device can be a screw conveyor.
  • the discharge device can be a chute with air seal.
  • the discharge device can be an air chute with air seal.
  • Discharge device can be arranged between the first separation device and the
  • the second discharge device can be arranged vertically between the first separation device and the grinding device.
  • the second discharge device can be designed to discharge at least 65 percent by mass, in particular at least 75 percent by mass, in particular at least 85 percent by mass, preferably at least 95 percent by mass of the fed-in bulk material as coarse material.
  • the first discharge device can be designed to discharge a maximum of 35 percent by mass, in particular a maximum of 25 percent by mass, in particular a maximum of 15 percent by mass, preferably a maximum of 5 percent by mass of the fed-in bulk material as fine material.
  • the first separation device can be a sifter, in particular a rotary sifter.
  • the speed of the sifter can be adjustable, in particular continuously adjustable.
  • the processing plant can further comprise a motor.
  • the separation device in particular the classifier, can be driven by the motor.
  • the grinding and separating device can comprise a control unit.
  • the control unit can be configured to control the proportion of fine material discharged via the first discharge device.
  • the proportion of fine material can be specified in relation to the bulk material fed in.
  • the control unit can be electronically connected to the motor.
  • the control unit can be configured to regulate the speed of the motor and thus the speed of the sifter.
  • the control unit can be configured to continuously regulate the speed of the motor and thus the speed of the sifter.
  • the proportion of fine material discharged can be controlled via the speed of the sifter.
  • the theoretical maximum grain size in the fine material can be regulated via the speed of the classifier.
  • the second separation device can be a sifter.
  • the second separation device can be a sieving device.
  • the second separation device can be designed to separate the discharged coarse material into a first fraction and a second fraction.
  • the second separation device can be designed to separate the discharged coarse material into a first fraction, a second fraction, and a third fraction.
  • the second separation device can be designed to separate the discharged coarse material into a first fraction, a second fraction, a third fraction, and a fourth fraction.
  • the fractions can have, on average, different grain sizes than one another.
  • the fractions can have, on average, different densities than one another.
  • the fractions can have, on average, different grain sizes and densities than one another.
  • a further aspect of the invention includes the use of a processing plant with a mill and a classifier for dedusting ore.
  • the ore is discharged from the processing plant predominantly as coarse material.
  • the classifier can be arranged above the mill. Above means in particular that the classifier is arranged vertically higher than the mill in relation to the subsoil, in particular the earth's surface.
  • the classifier can be arranged centrally above the mill in the vertical direction.
  • the classifier can be arranged offset above the mill transversely to the vertical direction.
  • the classifier is arranged in particular above a grinding table of the mill.
  • the classifier is arranged in particular above grinding rollers of the mill.
  • the sifter is in particular a rotary sifter.
  • the sifter comprises elements rotating about an axis, in particular a vertical axis.
  • Dedusting can be described as the removal of particles of small grain sizes, especially unwanted small grain sizes. Finely ground dust can cause problems during further processing of the processed ore. Particles with a grain size of less than 0.02 millimeters, especially less than 0.01 millimeters, can be referred to as dust.
  • Figure 1 shows a schematic representation of a processing plant according to the invention for processing bulk material.
  • Figure 2 shows a vertical section through a processing plant according to the invention for processing bulk material.
  • Fig. 1 shows a schematic representation of a processing plant 1 according to the invention.
  • the processing plant 1 comprises a grinding and separating device 2, a first discharge device 3 and a second discharge device 4.
  • the grinding and separating device 2 comprises a grinding device 5 and a first separation device 6.
  • Bulk material 8 stored in a silo 7 is conveyed via a conveyor belt 9 and a first rotary valve 10 to a material feed opening 11 of the grinding and separating device 2 and fed to the grinding device 5. After the grinding process, the bulk material 8 is transported by a process gas stream to the first separating device 6.
  • the first separating device 6 is designed as a rotary sifter in the embodiment shown in Fig. 1. The first
  • Separation device 6 separates the ground bulk material 8 into fine material 12 and coarse material 13.
  • the fine material 12 is discharged via the first discharge device 3 by means of a
  • Process gas flow is discharged from the grinding and separation device 2 and transported to a filter 14.
  • the fine material 12 is separated from the process gas flow and collected.
  • the fine material 12 collected in the filter 14 can be discharged from the filter 14 via a second rotary valve 15.
  • the filtered process gas flow is partly fed back to the grinding and separation device 2 via a pipe 16.
  • the remaining process gas flow is discharged from the processing plant 1 via an outlet 17.
  • the coarse material 13 is discharged from the grinding and separating device 2 via the second discharge device 4.
  • the second discharge device 4 is designed as a conveyor screw.
  • the discharged coarse material 13 is fed to an intermediate storage device 19 via a third rotary valve 18.
  • the coarse material 13 can then be discharged from the processing plant 1 or fed to a second separation device 20.
  • the second separation device 20 shown in Fig. 1 is a screening device and separates the coarse material 13 into four fractions B, C, D, E with different grain sizes.
  • the fine material 12 discharged from the filter 14 can be regarded as a first fraction A.
  • the second separation device 20 separates the coarse material 13 accordingly into a second fraction B, a third fraction C, a fourth fraction D and a fifth fraction E.
  • Fig. 2 shows a section of a processing plant 1 according to the invention. Essentially, Fig. 2 shows the grinding and separating device 2 of the processing plant 1. Bulk material 8 is added to the grinding device 5 via the material feed opening 11.
  • the grinding device 5 comprises a grinding plate 21 and several grinding rollers 22. The grinding rollers 22 comminute the bulk material 8 to form ground grinding material 23.
  • a process gas flow for example air or hot gas, is introduced into the grinding and separating device 2 via an air inlet opening 24 in the lower region of the grinding device 5.
  • the process gas flow transports sufficiently finely ground grinding material 23 to the first separating device 6.
  • the first separating device 6 is a rotary sifter.
  • the first separating device 6 comprises a lamellar wheel 25 which is driven by a motor 26.
  • the grinding and separating device 2 further comprises a control unit 27.
  • the control unit 27 is electronically connected to the motor 26 and is designed to control the motor 26 and thus the rotational speed of the lamellar wheel 25.
  • the rotational speed of the lamellar wheel 25 can be continuously regulated by the control unit 27 via the motor 26.
  • Sufficiently finely ground material 23 is discharged from the first separation device 6 as fine material 12 via the first discharge device 3.
  • the grinding and separation device further comprises a semolina cone 28.
  • Insufficiently finely ground material 23, so-called coarse material 13, is rejected by the separation device 6 in the direction of the semolina cone 28.
  • the semolina cone 28 guides the coarse material 13 to the second discharge device 4.
  • the second discharge device 4 is designed as a conveyor screw.
  • the coarse material 13 is discharged from the grinding and separation device 2 via the second discharge device 4.
  • the discharged coarse material 13 is then fed to a subsequent use.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Disintegrating Or Milling (AREA)
  • Crushing And Grinding (AREA)

Abstract

L'invention concerne un procédé de traitement d'une matière en vrac (8) dans une installation de traitement (1), comprenant les étapes consistant à : charger la matière en vrac (8) dans un dispositif de broyage et de séparation (2), ce dispositif de broyage et de séparation (2) comprenant un dispositif de broyage (5) et un dispositif de séparation (6), broyer la matière en vrac (8) dans le dispositif de broyage (5) de manière à obtenir une matière de broyage (23) broyée, séparer la matière de broyage (23) broyée dans le dispositif de séparation (6) en matière fine (12) et matière grossière (13) et évacuer la matière fine (12) du dispositif de broyage et de séparation (2), évacuer moins une partie de la matière grossière (13) hors du dispositif de broyage et de séparation (2), la partie évacuée de la matière grossière(13) représentant au moins 65 % en masse de la matière en vrac (8) chargée, et la partie évacuée de la matière grossière (13) étant amenée en vue d'une utilisation subséquente. Cette invention concerne en outre une installation de préparation (1) pour la préparation de matières en vrac (8) et l'utilisation d'une installation de préparation (1) avec broyeur et séparateur pour le dépoussiérage du minerai.
EP23783904.8A 2022-10-06 2023-10-05 Broyeur de matières en vrac pour la préparation de matières grossières Pending EP4598682A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22200014 2022-10-06
PCT/EP2023/077616 WO2024074632A2 (fr) 2022-10-06 2023-10-05 Broyeur de matières en vrac pour la préparation de matières grossières

Publications (1)

Publication Number Publication Date
EP4598682A2 true EP4598682A2 (fr) 2025-08-13

Family

ID=83688689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23783904.8A Pending EP4598682A2 (fr) 2022-10-06 2023-10-05 Broyeur de matières en vrac pour la préparation de matières grossières

Country Status (7)

Country Link
US (1) US20260124622A1 (fr)
EP (1) EP4598682A2 (fr)
CN (1) CN119968235A (fr)
AU (1) AU2023357318A1 (fr)
CL (1) CL2025001027A1 (fr)
MX (1) MX2025004045A (fr)
WO (1) WO2024074632A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026093191A1 (fr) * 2024-10-28 2026-05-07 Gebr. Pfeiffer Se Broyage à froid de matières premières

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57167746A (en) * 1981-04-08 1982-10-15 Ishikawajima Harima Heavy Ind Vertical crusher
US6820829B1 (en) * 2000-02-25 2004-11-23 Exportech Company, Inc. Method and apparatus for separating material
DE102005054209B4 (de) * 2005-11-14 2014-05-28 Loesche Gmbh Wälzmühle
CN105642408A (zh) * 2016-03-22 2016-06-08 中材装备集团有限公司 一种带有磨粉外导出机构的新型立式辊磨机
ES2637017B1 (es) * 2016-04-08 2018-07-18 Talleres Alquezar, S.A. Instalación de molienda para áridos
DK3326720T3 (da) * 2016-11-23 2022-01-10 Loesche Gmbh Fremgangsmåde til behandling af flerfase mineralske råmaterialer

Also Published As

Publication number Publication date
CL2025001027A1 (es) 2025-08-01
MX2025004045A (es) 2025-05-02
CN119968235A (zh) 2025-05-09
US20260124622A1 (en) 2026-05-07
AU2023357318A1 (en) 2025-04-10
WO2024074632A3 (fr) 2024-06-13
WO2024074632A2 (fr) 2024-04-11

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