EP3164217A1 - Procédé et dispositif pour le séchage et le broyage de matériaux humides - Google Patents
Procédé et dispositif pour le séchage et le broyage de matériaux humidesInfo
- Publication number
- EP3164217A1 EP3164217A1 EP15753081.7A EP15753081A EP3164217A1 EP 3164217 A1 EP3164217 A1 EP 3164217A1 EP 15753081 A EP15753081 A EP 15753081A EP 3164217 A1 EP3164217 A1 EP 3164217A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drying
- mill
- filtering
- grinding
- hot 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 82
- 238000001035 drying Methods 0.000 title claims abstract description 60
- 238000003801 milling Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title claims description 16
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims description 35
- 238000000227 grinding Methods 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 229910052788 barium Inorganic materials 0.000 claims description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000889 atomisation Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 41
- 239000007789 gas Substances 0.000 description 23
- 239000004927 clay Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 11
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 10
- 239000002994 raw material Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010411 cooking Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 235000014102 seafood Nutrition 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- 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
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
Definitions
- the present invention relates to a method and a device for its implementation, intended to grind, that is to say reduce to a range of particle size, in the form of fine particles or dust, inert raw materials, and having a non-negligible water content, for example having a moisture content between 10% and 90%, and especially between 15% and 85%.
- the process of the invention is applicable to any wet material, which is either powdery, plastic, powdery, fibrous, gelatinous, or pasty.
- the process of the invention finds application in several fields such as construction, communication routes, or food processing, or the environment, or chemistry, or cosmetics ...
- the process makes it possible to treat clay, which, once ground, is intended for the ceramic industry.
- the material may consist of algae, pasta, co-products from, for example, rendering or processing of seafood, dairy products, animal or vegetable protein, oilcake
- the material may consist of sewage sludge.
- the material may be from a precipitation or granulation process ...
- grinders are used for example, either rollers, or pendulum, or attrition, or impact, or sprayers, usually mills aunterlic type.
- the high quantities and volumes to be treated and the resistance of the materials to be crushed therefore require large and resistant installations that consume energy.
- the final particle size must be within a narrow range.
- grinding generates dust by definition, which should be avoided from the installation.
- the raw material is wet, such as clay.
- the difficulty increases further if the material, in addition to its moisture content, has a fibrous structure, gelatinous, or is high viscosity.
- a known drying installation comprises an enclosure into which are introduced on the one hand the material to be dried in bulk, and on the other hand a stream of gas (usually air) hot.
- Known drying systems are diverse and include, among others, so-called fast dryers, spray towers, drying tunnels, rotary dryers.
- the moisture content at the start is generally between 10% and 50%.
- the dried material is recovered with a reduced moisture content, typically between 0.1% and 20%.
- the drying chamber is preferably cylindrical and rotary. It is further connected, via a filter, a ventilation means that sucks the hot air loaded with dust, and recovers the latter to add to semi dry material coming directly from the enclosure.
- the dried material (at the exit of the dryer) is then directed to a second separate grinding plant, which comprises, in known manner, a "dynamic separator" provided with a known mill (of the roller or pendulum type) and at the base of which is blown a hot gas (usually air).
- a second separate grinding plant which comprises, in known manner, a "dynamic separator” provided with a known mill (of the roller or pendulum type) and at the base of which is blown a hot gas (usually air).
- the outlet of the mill is connected to a vacuum means, via a filter that separates the hot air loaded with moisture and dust, to recover the dried milled material.
- the mill base is connected to an additional source of pulsed hot gas to complete the drying.
- the final material must not only be ground to a given grain size, but must also have a moisture content within a given range, and in particular less than an imposed maximum. This last parameter is crucial for the ceramic industry.
- the present invention overcomes these drawbacks and proposes a method and an installation which makes it possible to obtain in a sure manner the desired grain size and the desired moisture content, which have a reduced overall dimension, which consumes less energy, and this compared with to the two known successive installations.
- the installation intended for drying and grinding of inert materials, raw, wet of the type comprising:
- Drying means comprising an enclosure into which the material to be dried in bulk is introduced;
- Dust filtering means at the exit of the mill; is characterized in that it comprises a single means of suction of the hot air (loaded with moisture and possibly dust according to the material) downstream of the mill, said suction means being common to the drying means and to the mill.
- the installation of the invention has the advantage, compared to the prior art, of being simpler and therefore less expensive to build (a only suction means and therefore only one means of filtration) and in operation (energy saving).
- the invention is advantageous in that:
- the installation comprises means for conveying hot gas from the source, passing through the various drying, grinding and filtering means to the single suction means downstream of the installation and arranged downstream of the filtering means.
- one or only suction means means a suction means which is only able to suck up and extract all the gas flowing in the installation from upstream to downstream, and arranged downstream of the installation.
- this suction means located downstream of the installation may include one or more suction elements of the fan type.
- the dust filtering means of the mill are arranged downstream of the mill, and said single suction means is arranged downstream of the filtering means.
- the installation further comprises an auxiliary source of hot gas connected to the inlet of the mill.
- the hot gas is preferably air, and can come either from an additional source provided for this purpose, or from a source different from another device and thus recovering the hot air from a process completely independent of the drying / grinding plant of the invention.
- the drying chamber is for example of the type: fast dryer, spray tower, drying tunnel, rotary dryer.
- the air mill is for example of the roller type or the pendular type.
- dust collector means for example of the cyclone type, and in particular two successive cyclones, at the outlet of the drying chamber, and the outlet of said dust collector means being connected to the inlet of the mill.
- the installation optionally comprises means for feeding and mixing the crushed dried material from the mill with additive materials, such as, for example, sand, wood, pigment, barium or any combination thereof.
- the invention also relates to a process for manufacturing a dried and ground material, of suitable particle size and having a pre-established moisture content, comprising successively at least one step of drying a material by introducing a hot gas , a step of grinding the dried material, and a step of filtering the dried and ground material to provide the appropriate particle size, characterized in that it comprises a single step of suction and exhaust gas which is carried out only after the filtering step.
- the hot gas circulates in a single circuit from the drying step, through the milling and filtering steps, to be sucked and extracted after the filtering step.
- the grinding step comprises the introduction of a stream of additional hot gas, this additional gas mixing with the gas from the drying step, all of the gases being sucked after the filtering step.
- Figure 1 is a simplified flow chart showing the different steps of the method and installation.
- Figure 2 is a simplified side diagram of the first part of the installation.
- Figure 3 is a simplified side diagram of the second part of the installation.
- FIG. 1 shows a schematic view in the form of a flowchart of the different steps of the method, and of the various stations of the installation according to the invention.
- the functional block 1 represents the material or materials to be treated, that is to say, to dry and grind to obtain a material of a suitable particle size on the one hand, and having a desired moisture content on the other hand.
- the invention is described hereinafter in a specific example of a particular material, namely clay, which has a high viscosity, and a high water content (between 10 and 35% moisture). It is understood that the invention is not limited to this material and may include in particular all the wet materials mentioned above.
- the clay undergoes a prior treatment, known per se, and consisting of:
- the material thus mechanically prepared in a coarse manner is conveyed to a drying station, referenced by block 2.
- the means drying are connected to a means 3 for generating hot air (known in itself).
- the material of the drying means is conveyed to grinding means 4, then downstream of the latter is provided a filtering means 6.
- the grinding means 4 are further connected to a second hot air generator 5.
- the filtering means 6 from which the dried and ground material is extracted are connected to a single suction means 7.
- the materials resulting from the filtering step 6 are conveyed (arrow 8) to a mixing station of the treated material, to additives, represented by the functional block 9.
- the various additives or added or complementary materials come from different reserves, symbolized by the functional block 10.
- the additives or complementary products and materials are arranged in storage means or reserves referenced 10A, 10B, 10C, 10D, 10E, and 10F (addition of liquid - water, solute, etc. - in the case clay.
- the materials and their additives, once mixed, are subjected to a final treatment for use, such as cooking for example in the case of clay, and represented by the functional block 1 1.
- the means of the invention are represented in detail, namely the drying means (block 2 of FIG. 1), the grinding means (blocks 4 and 5 of FIG. 1), and the filtering means (blocks 6 and 7 of FIG. 1).
- the raw material or grossly worked mechanically (block 1 of Figure 1) is conveyed, via a conveyor 12, of known type, to a hopper 13 located vertically above the inlet 14A located in upper part of drying means 14, of known type, such as for example a fast dryer.
- the drying means 14 also comprise a second feed inlet 14B located at the rear, and connected to a source of hot air 15 (block 3 of FIG. 1), of the type known per se and drawing ambient air. by an air intake 16.
- the drying means 14 penetrates on the one hand the product or the wet material, and on the other hand hot air.
- the path of hot air, and wet material have been symbolized by lines or curves traversing all the different devices, means and devices to achieve the final product.
- the flow or path of hot air is symbolized by discontinuous lines, while the path of the material or wet material, semi-wet or dry, is represented by continuous lines or paths.
- the drying means 14 comprise downstream two outlets from which are evacuated three families of materials and products:
- the dry or semi-dry material 17 is conveyed by a conveyor 20, known in itself and arranged substantially horizontally.
- the upstream end 20A of the conveyor 20 is located vertically below the lower outlet 14C of the drying means 14, while the downstream end 20B of the conveyor 20 is located vertically above a lifting device 23 provided with a noria of buckets or the like attached to an endless chain.
- the dust-laden air 18 of the material and the hot gas 19 (coming from the drying means 14) are conveyed to the inlet.
- cyclonic type dust collector means consisting in this instance of two successive cyclones 25 and 26.
- the two cyclones 25 and 26 comprise a discharge outlet respectively 25A and 26A, each equipped with a rotary lock 25B and 26B, and of which open the larger solid particles from semi-dry or dry material dust while the finest particles are retained in the corresponding cyclone. About 95 to 97% of the dust is thus recovered via cyclones 25 and 26.
- the material particles from the cyclones are represented by the paths 18A and 18B respectively.
- This hot air still contains a little dust (about 2 to 5%).
- the material particles 18A and 18B from the two cyclones form dry matter which is poured on the first horizontal conveyor 20, to join the material 17 directly from the outlet of the drying means 14.
- the dry material reaches the downstream end 24B of said conveyor, to be conveyed via a rotary lock 27, at the base of a mill 28 (block 4 of FIG. 1), of the known type in itself and of the aerodynamic type.
- a mill may consist of the known mill type pendulum referenced PM.
- the hot air stream 19A At the base and at the inlet of the mill 28 is also introduced the hot air stream 19A from the cyclones 25 and 26. To the hot air stream 19A penetrating the base of the mill 28, is added a second stream of hot air 29 from a second hot air generator 30 (block 5 of Figure 1), collecting the ambient air 31 to heat it according to known techniques.
- the second hot air generator 30 at the base of the mill is optional.
- the mill 28 delivers, at its upper outlet 28A, via a dynamic classifier known under the trade name DYNAIR, a mixture of dry milled material, in the form of dust, and hot air, along respective paths 31 and 32, which penetrate filtering means or filter 33 (block 6 of FIG. 1) known in itself and of the type for example an automatic compressed-air pulse bag filter known under the trade name INTENSIV FILTER or FB FILTRATION or DELTA NEU.
- DYNAIR dynamic classifier
- filtering means or filter 33 block 6 of FIG. 1
- the filtering means 33 receive a mixture from the mill, containing hot air charged with moisture and dry material, this mixture is filtered to separate the moist air from the material.
- the dry product extracted is conveyed under the reference 8 to the means for adding and mixing additives and complementary materials, represented by the block 9 of Figure 1 (and which is not visible in Figure 2).
- the hot, damp, dust-free gas is discharged via a path 34 which opens out according to the invention onto the single suction means 7 (FIG. 1).
- the latter consists of a vacuum fan 35, of the type known per se, and the output of which is connected to a vent stack conduit 36, to either the atmosphere or to means for recovering the calories that remain in the original hot air stream.
- the hot air thus follows a circuit through the various means / successive stations of the plant for manufacturing the dried and milled material at the particle size and at the humidity rate. hoc, this hot air from the first hot air generating means (3, 15) located upstream of the drying means 2 ( Figures 1 and 2) to be sucked and extracted only by the single fan 35 (means d suction 7) downstream of the filter 33.
- the hot air has a continuous path in a single circuit, from the hot air generation means 1 5 located upstream of the installation, to the evacuation 36, connected to the single fan vacuum cleaner 35, and this through all the means and devices described above, namely the drying means, the dust collector cyclones, the grinder, and the filter.
- the suction means 7, and the vacuum fan 35 is thus unique for the entire installation.
- the dry material treated, by drying, grinding and filtering, and referenced 8 is conveyed to a third horizontal conveyor 37, at the base of which, in the upper part, are arranged containers or reserve means of additional materials, additives, additional or other and represented by the functional block 10 ( Figure 1).
- the containers 10A to 10E are five in the example shown, it being understood that the number and content of these containers are based on the needs, and the material to be treated.
- the container 10A contains sand, the container 10B of the wood, the container 10C of the white clay, the container 10D of the pigments, and the container 10E of the barium carbonate, and the water inlet 10F.
- a mixer 38 which may consist of a single, two or more successive mixers, of the type known per se or in themselves, on a fourth horizontal conveyor 39.
- the latter conveys the final processed product, that is to say dried, crushed, filtered, and with the additives, and therefore a dry product directly usable, referenced 40, to so-called processing means of use, such as for example cooking, in the case of a material of origin under clay form.
- processing means of use such as for example cooking, in the case of a material of origin under clay form.
- the utilization treatment means are also supplied with cooking waste (chamotte resulting from bricks or broken or non-compliant tiles) from a source G, via an additional horizontal conveyor 41 .
- the manufacturing process takes into account the various operating parameters of the installation, including:
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1456271A FR3023187B1 (fr) | 2014-07-01 | 2014-07-01 | Procede et dispositif pour le sechage et le broyage de materiaux humides |
PCT/FR2015/051723 WO2016001537A1 (fr) | 2014-07-01 | 2015-06-25 | Procédé et dispositif pour le séchage et le broyage de matériaux humides |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3164217A1 true EP3164217A1 (fr) | 2017-05-10 |
EP3164217B1 EP3164217B1 (fr) | 2018-08-15 |
Family
ID=51570653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15753081.7A Active EP3164217B1 (fr) | 2014-07-01 | 2015-06-25 | Procédé et dispositif pour le séchage et le broyage de matériaux humides |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3164217B1 (fr) |
ES (1) | ES2700878T3 (fr) |
FR (1) | FR3023187B1 (fr) |
RU (1) | RU2680240C2 (fr) |
WO (1) | WO2016001537A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105536924B (zh) * | 2016-01-15 | 2018-04-06 | 江西峰竺新材料科技有限公司 | 磨粉干燥一体机及制粉系统 |
CN108325617B (zh) * | 2018-02-05 | 2019-08-27 | 绍兴市高砚智生物科技有限公司 | 一种医药用珍珠研磨系统 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1098794B (de) * | 1958-05-14 | 1961-02-02 | Hischmann Geb | Anlage zum Feinmahlen eines grubenfeuchten, fuer die Zementherstellung bestimmten Rohmaterials |
BE862930A (fr) * | 1977-01-26 | 1978-07-17 | Tabel Rene | Installation pour la combustion pyrolytique des dechets tels que ligneux |
SU1059380A1 (ru) * | 1982-04-08 | 1983-12-07 | Всесоюзный научно-исследовательский институт нерудных строительных материалов и гидромеханизации | Установка дл сушки и измельчени гранулированных и пастообразных материалов |
DE19641781A1 (de) * | 1996-10-10 | 1998-04-16 | Clariant Gmbh | Verfahren und Vorrichtung zum gleichzeitigen Mahlen und Trocknen eines feuchten Celluloseether enthaltenden Mahlgutes |
DK0842702T3 (da) * | 1996-11-15 | 2001-02-26 | Doumet Joseph E Dipl Ing | Fremgangsmåde og valsemølle til tørring og formaling af fugtigt fødemateriale |
EP1747814A1 (fr) * | 2005-07-25 | 2007-01-31 | Claudius Peters Technologies GmbH | Broyeur et procédé pour la dessiccation de matière broyée |
EA012860B1 (ru) * | 2006-02-28 | 2009-12-30 | Флсмидт А/С | Способ и установка для сушки и измельчения влажного минерального сырья |
US20090212140A1 (en) * | 2008-02-26 | 2009-08-27 | American Electric Power Company, Inc. | System and method for processing hygroscopic materials |
DE102009053059A1 (de) * | 2009-11-16 | 2011-05-19 | Schäfer Elektrotechnik und Sondermaschinen GmbH | Vorrichtung und Verfahren zur Erzeugung eines feinkörnigen Brennstoffs aus festen oder pastösen Energierohstoffen durch Torrefizierung und Zerkleinerung |
-
2014
- 2014-07-01 FR FR1456271A patent/FR3023187B1/fr not_active Expired - Fee Related
-
2015
- 2015-06-25 ES ES15753081T patent/ES2700878T3/es active Active
- 2015-06-25 WO PCT/FR2015/051723 patent/WO2016001537A1/fr active Application Filing
- 2015-06-25 EP EP15753081.7A patent/EP3164217B1/fr active Active
- 2015-06-25 RU RU2016150936A patent/RU2680240C2/ru active
Also Published As
Publication number | Publication date |
---|---|
RU2680240C2 (ru) | 2019-02-18 |
RU2016150936A (ru) | 2018-06-26 |
FR3023187A1 (fr) | 2016-01-08 |
ES2700878T3 (es) | 2019-02-19 |
FR3023187B1 (fr) | 2019-07-12 |
WO2016001537A1 (fr) | 2016-01-07 |
RU2016150936A3 (fr) | 2019-01-17 |
EP3164217B1 (fr) | 2018-08-15 |
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