EP2643100B1 - Apparatus and process for rinsing and dewatering solid granular materials rich in threadlike particles, like metal cables - Google Patents
Apparatus and process for rinsing and dewatering solid granular materials rich in threadlike particles, like metal cables Download PDFInfo
- Publication number
- EP2643100B1 EP2643100B1 EP11790744.4A EP11790744A EP2643100B1 EP 2643100 B1 EP2643100 B1 EP 2643100B1 EP 11790744 A EP11790744 A EP 11790744A EP 2643100 B1 EP2643100 B1 EP 2643100B1
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- EP
- European Patent Office
- Prior art keywords
- granular material
- solid granular
- material rich
- particles
- perforated plate
- Prior art date
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- 239000002245 particle Substances 0.000 title claims description 121
- 239000008187 granular material Substances 0.000 title claims description 102
- 239000007787 solid Substances 0.000 title claims description 96
- 238000000034 method Methods 0.000 title claims description 22
- 239000002184 metal Substances 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 title description 6
- 239000008346 aqueous phase Substances 0.000 claims description 42
- 239000010419 fine particle Substances 0.000 claims description 21
- 230000005484 gravity Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000010814 metallic waste Substances 0.000 description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 208000018747 cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome Diseases 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001080024 Telles Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
- B03B5/04—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on shaking tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/469—Perforated sheet-like material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/55—Cleaning with fluid jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2230/00—Specific aspects relating to the whole B07B subclass
- B07B2230/01—Wet separation
Definitions
- a screening system is for example described in the document US 2237491 which discloses a screen fed upstream with granular material of different particle sizes. Under the effect of vibration, the finer particles pass through the screen for further processing while the particles having a particle size greater than the size of the orifices remain on the screen and traverse the slope of the screen surface by gravity.
- the orifices are present on projections and face the direction of advancement of the material.
- this type of screen does not allow to obtain a proper screening and one of the major problems encountered is the clogging of canvases or grids by fragments of cables and other materials filiform, the section of which is smaller than the opening of the orifices of the screen fabric, but whose twisted shape promotes their accumulation on these fabrics, although the length of the filiform particles is often greater than the size of said orifices.
- solid granular material rich in filiform particles typically in the sense of the present invention a material from a metal waste treatment for the recovery of metals or its concentrate.
- the aforesaid material is rich in filiform particles such as metal cables.
- the "solid granular material rich in filiform particles” thus comprises particles having a preferential direction but also corrugated portions and which can thus be wound on themselves or intermesh with each other.
- the solid granular material rich in filiform particles is typically the result of a gravimetric concentration of metal waste in a dense medium. This operation can be performed by means of a conventional screen.
- the document DE19515349 relates to a method for separating solid particles of different sizes and densities in which the vibrating screen has projections and orifices.
- This screen is inclined relative to the horizontal at an angle of at least 20 ° to ensure proper separation of the different particles.
- such an inclination is not suitable for the treatment of solid granular materials rich filiform particles since such a slope promotes, under the action of gravity, the accumulation of filiform materials at the orifices located at the start of the projections, which ultimately results in the clogging of these openings.
- the invention aims to solve this problem by providing a device for the screening of products from the treatment of wet metal waste which minimizes the clogging of the orifices of the fabric.
- the invention provides a device for dewatering and optionally rinsing a solid granular material loaded with fine particles, characterized in that said solid granular material is rich in filiform particles and in that said perforated plate of orifices has projections 8 directed from the face of said perforated plate 2 receiving said solid granular material rich in filiform particles 6 upwards, said projections 8 being each provided with at least one orifice 9.
- An inclination ranging from 1 to 10 ° C advantageously prevents that, under the effect of gravity, filiform particles accumulate at the orifices located at the start of the projections, which causes the clogging of the latter.
- the screening of the material resulting from a wet metal waste treatment It is intended to separate on the one hand an aqueous phase from a solid phase which comprises solid granular material rich in filiform particles.
- the product resulting from the treatment of wet metal scrap may already comprise an aqueous phase which must be separated from the solid granular material rich in filiform particles and in this case, the solid granular material rich in filiform particles must be drained. and that the solid granular material rich in filiform particles may be optionally rinsed with an aqueous phase fed separately.
- the aqueous phase whether fed or residual wet metal waste treatment or both, carries with it fine particles whose particle size is smaller than the size of the orifices of the screen ( perforated plate).
- said supply of solid granular material rich in filiform particles is at the bottom of the perforated plate at the level of the head portion and the solid granular material rich in filiform particles back the plate up to at the tail portion where it is recovered for further processing.
- the aqueous phase flows by gravity either on the plate or under the plate or both depending on the location of the perforated plate where the aqueous phase passes through the orifices, countercurrently with respect to the rich solid granular material in filiform particles that goes up the screen.
- the vibration of the sieve and the rise of the material distribute the solid granular material rich in filiform particles homogeneously, which reduces the clogging of the orifices, the inclination being arranged to be such that it allows the upward progression of the solid granular material rich in filiform particles, avoiding that it descends under the effect of gravity, and therefore taking into account the the density of solid granular material rich in filiform particles to be treated.
- the granular materials advance on the sheets without the possibility of penetrating into the openings or orifices, by rebounding.
- the liquid flows gravitarily against the direction, giving it the opportunity to rush into the openings and be recovered at the bottom of the vibrating.
- This liquid can carry fine particles smaller than the size of the openings and for which the effects of driving the liquid are greater than the effects of the vibration. This feature allows for washing and rinsing operations while recovering a drained product output vibrating.
- the conventional methods of gravimetric concentration of the recovery of metals generally treat a product having a size spectrum of metal particles to be recovered ranging from 10 microns to 300 mm.
- Existing rinsing processes only treat particles larger than 15-20 mm because these processes use relatively large orifices to reduce clogging.
- the dewatering and optionally rinsing device comprises a second vibrating screen comprising a perforated orifice plate comprising a transverse median, said perforated plate having an inclination with respect to the horizontal plane passing through. by said transverse median, a head portion and a tail portion, said head portion being located below said horizontal plane of said second vibrating screen and under said tail portion of said first vibrating screen and said tail portion being located above the horizontal plane of said first vibrating screen; and wherein the outlet of said drained filiform particulate rich granular material is connected to said tail portion of said second vibrating screen.
- the device according to the invention has a plurality of vibrating screens arranged in series with respect to the direction of advancement of the solid granular material rich in filiform particles.
- the vibrating screens of said plurality are arranged in series, but in staircase. In this way, the tail portion of the second screen is under the series portion of said first screen.
- the head portion of the second sieve is above the tail portion of the next sieve and so on to the last.
- the granular material falls and turns to land on said second screen where it may for example undergo a new rinse to using another feed of an aqueous phase.
- the size of the openings is chosen according to the size of the particles that can be accepted in the recovered liquid.
- said inclination is chosen in the range from 1 to 5 °.
- the amplitude, the frequency and the direction of vibration are adjusted so as to raise the solids toward the tail end of the vibrator, the aforesaid values being preferential based on the type of metal waste treated. wet.
- the vibrating screen particles having a particle size from 3 mm and for example up to 300 mm, can be drained and optionally rinsed successfully without clogging the orifices.
- the efficiency of the process will be much higher since the losses are decreased.
- each projection provided with at least one of said orifices is in the form of a tile, said at least one of said orifices facing said tail portion.
- the openings of the sheets are obtained by stamping so as to obtain a tile shape. They are preferably staggered and are oriented such that the orifice faces said tail portion of the perforated plate.
- the orifices of the vibrating screen do not face the solid granular material rich in filiform particles that goes up the screen, which prevents sections of cables or son and the like can get stuck and clogged.
- This embodiment particularly preferred substantially reduces to zero the clogging phenomenon of the perforated plate.
- said first ascent is carried out according to an average trajectory inclined at an angle of 1 to 10 ° with respect to a horizontal plane.
- the process according to the invention thus allows, as mentioned above, a dewatering and optionally a rinsing of a solid granular material rich in filiform particles in which the solid granular material rich in filiform particles back the perforated plate towards the tail portion, under the effect of vibration, it is distributed in a homogeneous manner which favors the result of dripping and possibly rinsing by reducing the clogging of the orifices.
- the granular material rich in filiform particles back said perforated orifice plate which has an inclination ranging from 1 to 10 ° relative to the horizontal plane passing through said transverse median. Such inclination advantageously avoids that, under the effect of gravity, threadlike materials do not accumulate at the orifices facing it on the other side of the projections, which could otherwise lead to the clogging of the latter. .
- said second ascent is carried out according to an average trajectory inclined at an angle of 1 to 10 °, preferably 1 to 5 ° relative to a horizontal plane.
- said first lift is carried out along an average path inclined at an angle of 1 to 5 ° relative to said horizontal.
- said solid granular material rich in filiform particles bounces on the sieve and bypasses protrusions coming out of said perforated plate upwards (from above or from the side).
- said aqueous phase flows at least through orifices present on said projections facing said tail portion.
- said recovered aqueous phase is recycled for reuse in said aqueous phase feed.
- the solid granular material rich in filiform particles is further rinsed with an aqueous phase fed above said first and / or second perforated plate respectively.
- the invention also relates to a use of a device according to the invention for draining a solid granular material rich in filiform particles and optionally rinsing a solid granular material rich in filiform particles.
- the figure 1 is a side view of a device according to the invention.
- the figure 2 is a sectional view of a projection of a perforated grid according to the invention, itself illustrated in FIG. figure 3 .
- the figure 4 is a perspective view of a preferred device according to the invention.
- the figure 5 is a perspective view of a variant according to the invention of the figure 4 .
- the device according to the invention comprises a vibrating screen 1 provided with a perforated plate 2.
- the vibrating screen comprises a transverse median X through which passes a horizontal plane.
- the plane of the perforated grid 2 of the vibrating screen 1 has an inclination of an angle ⁇ relative to the aforesaid horizontal plane, between 1 and 10 °, preferably less than 8.
- the perforated plate 2 has a head portion 3 and a tail portion 4 and, in view of the aforementioned inclination, the head portion 3 is lower than the tail portion 4, and is therefore located under the aforesaid horizontal plane . As a result, the tail portion 4 is located above the aforesaid horizontal plane.
- the device according to the invention comprises a feed of solid granular material rich in filiform particles 5, loaded with fine particles.
- Said solid granular material rich in filiform particles 6 loaded with fine particles is preferably derived from a wet metal waste treatment and therefore comprises an aqueous phase as well.
- the device according to the invention also comprises a series of feeds in an aqueous phase 7 arranged to feed an aqueous phase for rinsing the solid granular material rich in filiform particles 6 which is on the perforated grid 2 of said vibrating screen.
- the perforated grid is moved under the effect of a motor which gives it an amplitude, a frequency and a direction of vibration arranged to raise the solid granular material rich in filiform particles 6 of the head portion 3 towards the tail portion 4 where it will then be recovered, possibly for further processing
- the aqueous phase originating on the one hand from the solid granular material rich in filiform particles 6 resulting from the treatment of wet metal waste and / or on the other hand from the aqueous phase feeds 7 rinses the solid granular material rich in filiform particles 6 which goes up the vibrating screen 1 to the tail portion 4 and the aqueous phase flows either on the perforated plate 2, or through holes 9 and then in the trough 13 at the bottom of the vibrating screen. It is then recovered by a suitable device 14 and conveyed to be subsequently treated and / or recycled according to the arrow B of the figure 1 .
- the solid granular material rich in filiform particles 6 thus raises the perforated plate in the average direction A and the aqueous phase flows against the current in the direction B by gravity.
- the directions A and B are the resultants of the various trajectories respectively of the solid granular material rich in filiform particles 6 and of the aqueous phase since the vibrations and the movement of the sieve generate a turbulent and disturbed movement of the latter.
- the perforated plate 2 of the vibratory screen 1 further comprises protrusions 8 obtained by stamping so as to obtain a tile shape, that is to say projections 8 upwards having an upper domed surface, as can be seen in FIG. see to the figure 2 , substantially flattened on the top so as to advance the solid granular material rich in filiform particles 6 to the portion of tail 4 as homogeneous as possible. Therefore, the upper face of the projection 8 has 2 lateral parts, inclined and curved 10 and 11 connected at their apex by a substantially flat face 12. Preferably, the thickness of the upper face of the projection is similar to that of the perforated plate 2 since the projections are obtained by stamping.
- Each projection has a longitudinal aperture 9 of about 30 mm in the width direction of the perforated plate or the transverse median X, i.e., having about the same width as that of the upper planar surface 12.
- the height of the orifices generally between 200 microns and 3 mm.
- the longitudinal orifice 9 faces the tail portion 4.
- the projections are preferably aligned in the direction of the transverse median X and staggered in the direction of the longitudinal median.
- the orifices 9 of the same row are preferably inscribed in an oblique plane or perpendicular to the plane of the perforated plate 2.
- the figure 4 illustrates a preferred embodiment of the device according to the invention.
- the illustrated device comprises a first and a second vibrating screen 1,1 'respectively comprising a first and a second perforated plate 2,2'.
- a device may also include more than two vibrating screens arranged in series and in staircase, for example three.
- each of the three vibrating screens arranged in series, and in staircase comprises two perforated plates disposed end to end in series about 1.7 m wide by 2 m long.
- This therefore makes it possible to have three vibrating screens in steps, each comprising two perforated sheets, 4 m long and 1.7 m wide for rinsing and / or draining over 12 m long.
- the device according to the invention which does not suffer from clogging, it is advantageous to rinse the first side of the solid granular material rich in filiform particles on the two perforated plates of the first vibrating screen, to rinse the second side of the material.
- solid granular material rich in filiform particles on the two perforated plates of the second vibrating screen through the overturning thereof and then drain, without additional rinsing, solid granular material rich in filiform particles on the two perforated plates of the third vibrating screen for achieve optimal rinsing performance and drainage.
- the solid granular material rich in filiform particles is then fed by the feed 5 to the first perforated plate 2 of the first vibrating screen, at the level of the head portion 3.
- the granular material is illustrated as being fed to the head portion 3 of the first vibrating screen 1, this is in no way limiting. Indeed, the solid granular material rich in filiform particles to be drained could also be fed to other places, for example in a more central part.
- the solid granular material rich in filiform particles bounces and raises the first vibrating screen 1 inclined at an angle ⁇ relative to the horizontal (included advantageously between 1 and 5 °).
- the solid granular material rich in filiform particles may be rinsed with an aqueous phase fed by rinsing jets 7 which spray the aqueous phase during its ascent of the first vibrating screen 1.
- rinsing jets 7 which spray the aqueous phase during its ascent of the first vibrating screen 1.
- the second vibrating screen 1 ' comprises for example a second perforated plate 2' which is inclined at an angle ⁇ ', which is identical or different with respect to ⁇ but preferably between 1 and 5 °.
- the solid granular material rich in filiform particles rebounds and raises the second vibrating screen 2 'where it can be advantageously rinsed by an aqueous phase supplied by rinsing jets 7.
- the different rinsing jets 7 can spray the same aqueous phase or phases A different aqueous solution which may be water, an aqueous acidic, basic, detergent or neutralizing solution.
- the head position 3 of the second vibrating screen 1 ' is located under the tail portion 4 of the first vibrating screen 1, partially overlapping so that when the solid granular material rich in filiform particles reaches the tail portion 4, it falls and turns on the second vibrating screen 1 'where it is recovered.
- the spacing between the vibrating screens being dimensioned according to the particle size of the granular solid material rich in filiform particles, so that it can turn by half a turn for optimal rinsing.
- the solid granular material rich in filiform particles is recovered by dropping into a recovery tank 15 for subsequent conditioning or subsequent treatment located beneath the tail portion 4 of the second strainer. vibrant.
- the aqueous phase penetrates the orifices 9 of the projections 8 of the first and second perforated plate 2,2 'and is recovered in the trough 13 below by gravity to then flow into an aqueous phase recovery device 14 against -current in the direction B relative to the solid granular material rich in filiform particles (direction A).
- the figure 5 is a variant of the figure 4 wherein the vibrating screens 1, 1 'comprise a common trough 13.
- a width of the openings of 30 mm and a height of 500 microns were retained. Jets of rinsing water were placed above the vibrator to clean the particles. A staircase has also been placed to cause the flipping of the particles. Each vibrating screen was inclined at an angle of 2 ° to the horizontal. The sieve vibrated at a frequency of 6.25 Hz and had a range of motion of 25 mm. The solid granular material rich in filiform particles had a forward speed of about 0.2 m / sec and the rinsing capacity was between 20 and 30 m 3 / h.
- the product to be washed shows a strong magnetite contamination on the surface of the metal fragments.
- the product after washing is relatively free of magnetite. It leaves the vibrator properly drained without any clogging of the perforated plate was observed.
- the pulp (water-magnetite mixture) obtained at the bottom of the vibrator can be treated and recycled; the water can be reused in the washing and the magnetite can reintegrate the gravimetric separation process in a dense medium.
- the orifices and projections of the grid may have other shapes and sizes than those described here, for example depending on the solid granular material rich in filiform particles to be treated.
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- Combined Means For Separation Of Solids (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Description
La présente invention se rapporte à un dispositif d'égouttage et éventuellement de rinçage d'une matière granulaire solide riche en particules filiformes et chargée de particules fines comprenant :
- un premier tamis vibrant comprenant une plaque perforée d'orifices, comprenant une médiane transversale , ladite plaque perforée présentant une inclinaison α allant de 1 à 10° par rapport au plan horizontal passant par ladite médiane transversale X, une portion de tête et une portion de queue, ladite portion de tête étant située en dessous dudit plan horizontal dudit premier tamis vibrant et ladite portion de queue étant située au-dessus dudit plan horizontal dudit premier tamis vibrant,
- une alimentation de ladite matière granulaire solide riche en particules filiformes et chargée de particules fines agencée pour alimenter ladite matière granulaire solide riche en particules filiformes sur la portion de tête dudit premier tamis vibrant,
- au moins une alimentation d'une phase aqueuse pour éliminer par entraînement lesdites particules fines,
- une sortie de ladite matière granulaire solide riche en particules filiformes égouttée, agencée pour la récupération de ladite matière granulaire solide riche en particules filiformes à ladite portion de queue, et,
- une sortie de ladite phase aqueuse chargée en particules fines par gravité, sous ledit premier tamis vibrant.
- a first vibrating screen comprising a perforated plate of orifices, comprising a transverse median, said perforated plate having an inclination α ranging from 1 to 10 ° relative to the horizontal plane passing through said transverse median X, a head portion and a portion of tail, said head portion being located below said horizontal plane of said first vibrating screen and said tail portion being located above said horizontal plane of said first vibrating screen,
- feeding said solid granular material rich in filiform particles and loaded with fine particles arranged to feed said solid granular material rich in filiform particles onto the head portion of said first vibrating screen,
- at least one feed of an aqueous phase to drive off said fine particles,
- an outlet of said solid granular material rich in filiform particles drained, arranged for the recovery of said solid granular material rich in filiform particles at said tail portion, and
- an outlet of said aqueous phase loaded with fine particles by gravity, under said first vibrating screen.
Un système de criblage est par exemple décrit dans le document
Par les termes « matière granulaire solide riche en particules filiformes », on entend typiquement au sens de la présente invention une matière issue d'un traitement de déchets métalliques en vue de la récupération de métaux ou son concentré. La matière susdite est riche en particules filiformes telles que des câbles métalliques. La « matière granulaire solide riche en particules filiformes » comprend donc des particules présentant une direction préférentielle mais également des parties ondulées et qui peuvent donc s'enrouler sur elles-mêmes ou s'emmêler entre elles. La matière granulaire solide riche en particules filiformes est typiquement le résultat d'une concentration gravimétrique de déchets métalliques en milieu dense. Cette opération peut être réalisée au moyen d'un crible conventionnel.By the term "solid granular material rich in filiform particles" is meant typically in the sense of the present invention a material from a metal waste treatment for the recovery of metals or its concentrate. The aforesaid material is rich in filiform particles such as metal cables. The "solid granular material rich in filiform particles" thus comprises particles having a preferential direction but also corrugated portions and which can thus be wound on themselves or intermesh with each other. The solid granular material rich in filiform particles is typically the result of a gravimetric concentration of metal waste in a dense medium. This operation can be performed by means of a conventional screen.
Par ailleurs, les documents
Le document
L'invention a pour objet de résoudre ce problème en procurant un dispositif permettant le criblage de produits issus du traitement de déchets métalliques en voie humide qui minimise le colmatage des orifices de la toile. A cette fin, l'invention procure un dispositif d'égouttage et éventuellement de rinçage d'une matière granulaire solide chargée de particules fines caractérisé en ce que ladite matière granulaire solide est riche en particules filiformes et en ce que ladite plaque perforée d'orifices présente des saillies 8 dirigées de la face de ladite plaque perforée 2 recevant ladite matière granulaire solide riche en particules filiformes 6 vers le haut, lesdites saillies 8 étant munies chacune d'au moins un orifice 9.The invention aims to solve this problem by providing a device for the screening of products from the treatment of wet metal waste which minimizes the clogging of the orifices of the fabric. To this end, the invention provides a device for dewatering and optionally rinsing a solid granular material loaded with fine particles, characterized in that said solid granular material is rich in filiform particles and in that said perforated plate of orifices has
Une inclinaison allant de 1 à 10 °C permet avantageusement d'éviter que, sous l'effet de la gravité, des particules filiformes ne s'accumulent au niveau des orifices situés au départ des saillies, ce qui entraîne le colmatage de ces derniers.An inclination ranging from 1 to 10 ° C advantageously prevents that, under the effect of gravity, filiform particles accumulate at the orifices located at the start of the projections, which causes the clogging of the latter.
Dans le cadre de la présente invention, le criblage de la matière issue d'un traitement de déchets métalliques en voie humide entend séparer d'une part une phase aqueuse d'une phase solide qui comprend de la matière granulaire solide riche en particules filiformes. Ceci signifie que le produit issu du traitement de déchets métalliques en voie humide peut déjà comprendre une phase aqueuse qu'il faut séparer de la matière granulaire solide riche en particules filiformes et dans ce cas, la matière granulaire solide riche en particules filiformes doit être égouttée et que la matière granulaire solide riche en particules filiformes peut être éventuellement rincée par une phase aqueuse alimentée séparément. Dans chacune des situations susdites, la phase aqueuse, qu'elle soit alimentée ou résiduelle du traitement de déchets métalliques en voie humide ou les deux, entraîne avec elle des particules fines dont la taille de particules est inférieure à la taille des orifices du crible (de la plaque perforée).In the context of the present invention, the screening of the material resulting from a wet metal waste treatment It is intended to separate on the one hand an aqueous phase from a solid phase which comprises solid granular material rich in filiform particles. This means that the product resulting from the treatment of wet metal scrap may already comprise an aqueous phase which must be separated from the solid granular material rich in filiform particles and in this case, the solid granular material rich in filiform particles must be drained. and that the solid granular material rich in filiform particles may be optionally rinsed with an aqueous phase fed separately. In each of the aforesaid situations, the aqueous phase, whether fed or residual wet metal waste treatment or both, carries with it fine particles whose particle size is smaller than the size of the orifices of the screen ( perforated plate).
Comme on peut le constater, selon l'invention, ladite alimentation en matière granulaire solide riche en particules filiformes se fait au bas de la plaque perforée au niveau de la portion de tête et la matière granulaire solide riche en particules filiformes remonte la plaque jusqu'à la portion de queue où elle est récupérée pour un traitement ultérieur.As can be seen, according to the invention, said supply of solid granular material rich in filiform particles is at the bottom of the perforated plate at the level of the head portion and the solid granular material rich in filiform particles back the plate up to at the tail portion where it is recovered for further processing.
La phase aqueuse alimentée simultanément à la matière granulaire solide riche en particules filiformes et/ou séparément s'écoule au travers des orifices de la plaque perforée et entraine les particules fines avec elle. La phase aqueuse s'écoule par gravité soit sur la plaque, soit sous la plaque ou les deux en fonction de l'endroit de la plaque perforée où la phase aqueuse traverse les orifices, à contre-courant par rapport à la matière granulaire solide riche en particules filiformes qui remonte le crible.The aqueous phase fed simultaneously to the solid granular material rich in filiform particles and / or separately flows through the orifices of the perforated plate and entrains the fine particles with it. The aqueous phase flows by gravity either on the plate or under the plate or both depending on the location of the perforated plate where the aqueous phase passes through the orifices, countercurrently with respect to the rich solid granular material in filiform particles that goes up the screen.
De cette façon, la vibration du tamis et la remontée de la matière répartissent la matière granulaire solide riche en particules filiformes de manière homogène, ce qui réduit le colmatage des orifices, l'inclinaison étant agencée pour être telle qu'elle permette l'avancement vers le haut de la matière granulaire solide riche en particules filiformes, en évitant que celle-ci ne descende sous l'effet de la gravité, et donc en tenant compte de la densité de la matière granulaire solide riche en particules filiformes à traiter.In this way, the vibration of the sieve and the rise of the material distribute the solid granular material rich in filiform particles homogeneously, which reduces the clogging of the orifices, the inclination being arranged to be such that it allows the upward progression of the solid granular material rich in filiform particles, avoiding that it descends under the effect of gravity, and therefore taking into account the the density of solid granular material rich in filiform particles to be treated.
En résumé, les matières granulaires (et notamment les câbles et autres particules filiformes de section inférieure aux ouvertures des tôles) avancent sur les tôles sans avoir la possibilité de pénétrer dans les ouvertures ou orifices, par rebondissement. Au contraire, le liquide s'écoule gravitairement à contre sens, lui donnant la possibilité de s'engouffrer dans les ouvertures et d'être récupéré au bas du vibrant. Ce liquide peut emporter des particules fines de taille inférieure à la dimension des ouvertures et pour lesquelles les effets d'entraînement du liquide sont plus importants que les effets de la vibration. Cette particularité permet de réaliser des opérations de lavage et de rinçage tout en récupérant un produit égoutté en sortie de vibrant.In summary, the granular materials (and in particular the cables and other filiform particles of section smaller than the openings of the sheets) advance on the sheets without the possibility of penetrating into the openings or orifices, by rebounding. On the contrary, the liquid flows gravitarily against the direction, giving it the opportunity to rush into the openings and be recovered at the bottom of the vibrating. This liquid can carry fine particles smaller than the size of the openings and for which the effects of driving the liquid are greater than the effects of the vibration. This feature allows for washing and rinsing operations while recovering a drained product output vibrating.
De cette façon, le spectre granulométrique de la matière granulaire solide riche en particules filiformes est fortement réduit par rapport à un traitement classique sur un vibrant horizontal où la granulométrie moyenne du produit résultant est élevée.In this way, the particle size spectrum of the solid granular material rich in filiform particles is greatly reduced compared to conventional treatment on a horizontal vibrator where the average particle size of the resulting product is high.
En effet, les procédés conventionnels de concentration gravimétrique de la récupération de métaux traitent généralement un produit présentant un spectre de taille de particules métalliques à récupérer allant de 10 µm à 300 mm. Les procédés existants de rinçage ne traitent que les particules présentant une taille supérieure à 15-20 mm parce que ces procédés utilisent des orifices relativement grands pour réduire le colmatage. En conséquence, les fines particules (d = de 3 à 20 mm), si elles étaient traitées, passeraient au travers des orifices et seraient perdues. Si ces procédés ou dispositifs de rinçage et/ou égouttage utilisaient des orifices plus petits pour minimiser les pertes, le colmatage serait trop fréquent, nécessitant de cette façon des coûts élevés de main d'oeuvre pour racler et ratisser la matière granulaire et dé-colmater les toiles, ce qui rend le rinçage/égouttage discontinu et peu rentable.Indeed, the conventional methods of gravimetric concentration of the recovery of metals generally treat a product having a size spectrum of metal particles to be recovered ranging from 10 microns to 300 mm. Existing rinsing processes only treat particles larger than 15-20 mm because these processes use relatively large orifices to reduce clogging. As a result, the fine particles (d = 3 to 20 mm), if treated, would pass through the orifices and be lost. If these methods or rinsing and / or draining devices used smaller orifices to minimize losses, the clogging would be all too common, requiring high labor costs in this way to scrape and rake the granular material and de-clog the webs, rendering the rinsing / drip discontinuous and uneconomic.
Dans une forme de réalisation avantageuse, le dispositif de d'égouttage et éventuellement de rinçage selon l'invention comprend un deuxième tamis vibrant comprenant une plaque perforée d'orifices comprenant une médiane transversale, ladite plaque perforée présentant une inclinaison par rapport au plan horizontal passant par ladite médiane transversale, une portion de tête et une portion de queue, ladite portion de tête étant située en dessous dudit plan horizontal dudit deuxième tamis vibrant et sous ladite portion de queue dudit premier tamis vibrant et ladite portion de queue étant située au-dessus du plan horizontal dudit premier tamis vibrant ; et dans lequel la sortie de ladite matière granulaire solide riche en particules filiformes égouttée est reliée à ladite portion de queue dudit deuxième tamis vibrant.In an advantageous embodiment, the dewatering and optionally rinsing device according to the invention comprises a second vibrating screen comprising a perforated orifice plate comprising a transverse median, said perforated plate having an inclination with respect to the horizontal plane passing through. by said transverse median, a head portion and a tail portion, said head portion being located below said horizontal plane of said second vibrating screen and under said tail portion of said first vibrating screen and said tail portion being located above the horizontal plane of said first vibrating screen; and wherein the outlet of said drained filiform particulate rich granular material is connected to said tail portion of said second vibrating screen.
Un retournement des matières est donc rendu possible par un positionnement de tôles en escalier. En particulier, le dispositif selon l'invention présente une pluralité de tamis vibrants disposés en série par rapport à la direction d'avancement de la matière granulaire solide riche en particules filiforme. Les tamis vibrants de ladite pluralité sont disposés en série, mais en escalier. De cette façon, la portion de queue du deuxième tamis se trouve sous la portion de série dudit premier tamis. La portion de tête du deuxième tamis se trouve au-dessus de la portion de queue du tamis suivant et ainsi de suite jusqu'au dernier.A reversal of the materials is made possible by a positioning of stepped sheets. In particular, the device according to the invention has a plurality of vibrating screens arranged in series with respect to the direction of advancement of the solid granular material rich in filiform particles. The vibrating screens of said plurality are arranged in series, but in staircase. In this way, the tail portion of the second screen is under the series portion of said first screen. The head portion of the second sieve is above the tail portion of the next sieve and so on to the last.
Dès lors, lors de l'avancement de la matière granulaire solide riche en particules filiformes, lorsqu'elle atteint la portion de tête, la matière granulaire chute et se retourne pour atterrir sur ledit deuxième tamis où elle pourra par exemple subir un nouveau rinçage à l'aide d'une autre alimentation d'une phase aqueuse.Therefore, during the advancement of the solid granular material rich in filiform particles, when it reaches the head portion, the granular material falls and turns to land on said second screen where it may for example undergo a new rinse to using another feed of an aqueous phase.
Un tel retournement de la matière granulaire solide riche en particules filiformes permet un rinçage optimal de la partie supérieure et inférieure de celle-ci.Such a reversal of the solid granular material rich in filiform particles allows optimal rinsing of the upper and lower part thereof.
La dimension des ouvertures est choisie en fonction de la taille des particules pouvant être acceptées dans le liquide récupéré.The size of the openings is chosen according to the size of the particles that can be accepted in the recovered liquid.
Avantageusement, ladite inclinaison est choisie dans la plage allant de 1 à 5°.Advantageously, said inclination is chosen in the range from 1 to 5 °.
Comme on l'a dit précédemment l'amplitude, la fréquence et le sens de vibration sont ajustés de manière à faire monter les matières solides vers l'extrémité de queue du vibrant, les valeurs susdites étant préférentielles sur base du type de déchet métallique traité en voie humide.As previously mentioned, the amplitude, the frequency and the direction of vibration are adjusted so as to raise the solids toward the tail end of the vibrator, the aforesaid values being preferential based on the type of metal waste treated. wet.
Selon l'invention, grâce à la configuration du tamis vibrant les particules présentant une taille de particules à partir de 3 mm et par exemple jusqu'à 300 mm, peuvent être égouttées et éventuellement de rincées avec succès sans colmatage des orifices. En conséquence, le rendement du procédé sera bien plus élevée puisque les pertes sont diminuées.According to the invention, thanks to the configuration of the vibrating screen particles having a particle size from 3 mm and for example up to 300 mm, can be drained and optionally rinsed successfully without clogging the orifices. As a result, the efficiency of the process will be much higher since the losses are decreased.
Dans une forme de réalisation particulièrement préférentielle, chaque saillie munie d'au moins un desdits orifices présente une forme de tuile, ledit au moins un desdits orifices faisant face à ladite portion de queue.In a particularly preferred embodiment, each projection provided with at least one of said orifices is in the form of a tile, said at least one of said orifices facing said tail portion.
De préférence, les ouvertures des tôles sont obtenues par emboutissage de manière à obtenir une forme de tuile. Elles sont placées de préférence en quinconce et sont orientées de telle façon que l'orifice fait face à ladite portion de queue de la plaque perforée.Preferably, the openings of the sheets are obtained by stamping so as to obtain a tile shape. They are preferably staggered and are oriented such that the orifice faces said tail portion of the perforated plate.
Dès lors, les orifices du tamis vibrant ne font pas face à la matière granulaire solide riche en particules filiformes qui remonte le tamis, ce qui évite que les sections de câbles ou fils et analogues puissent s'y coincer et les colmater. Cette forme de réalisation particulièrement préférentielle réduit pratiquement à zéro le phénomène de colmatage de la plaque perforée.Therefore, the orifices of the vibrating screen do not face the solid granular material rich in filiform particles that goes up the screen, which prevents sections of cables or son and the like can get stuck and clogged. This embodiment particularly preferred substantially reduces to zero the clogging phenomenon of the perforated plate.
D'autres formes de réalisation du dispositif selon l'invention sont mentionnées dans les revendications annexées.Other embodiments of the device according to the invention are mentioned in the appended claims.
La présente invention a également pour objet un procédé d'égouttage et éventuellement de rinçage d'une matière granulaire solide riche en particules filiformes et chargée de particules fines comprenant :
- une alimentation de ladite matière granulaire solide riche en particules filiformes chargée de particules fines sur un premier tamis vibrant dans une portion de tête d'une première plaque perforée,
- une première remontée de ladite matière granulaire solide riche en particules filiformes sur ladite première plaque perforée dudit premier tamis vibrant vers une portion de queue, par vibration de ladite première plaque perforée, ladite première remontée étant effectuée selon une trajectoire inclinée d'un angle α de 1 à 10° par rapport à un plan horizontal,
- un premier égouttage de ladite matière granulaire solide riche en particules filiformes avec écoulement de ladite phase aqueuse au travers de ladite première plaque perforée et une récupération par gravité de ladite phase aqueuse sous ledit premier tamis vibrant de telle façon que la phase aqueuse et ladite matière granulaire solide riche en particules filiformes circulent l'une par rapport à l'autre en contrecourant au niveau de ladite plaque perforée, et
- une récupération de ladite matière granulaire en particules filiformes égouttée. Ce procédé est caractérisé en ce que, pendant la vibration de ladite première plaque perforée, ladite matière granulaire solide riche en particules filiformes rebondit sur le tamis et contourne des saillies sortant de ladite plaque perforée vers le haut (par le dessus ou par le côté),
- feeding said solid granular material rich in filiform particles loaded with fine particles onto a first vibrating screen in a head portion of a first perforated plate,
- a first rise of said solid granular material rich in filiform particles on said first perforated plate of said first vibrating screen to a tail portion, by vibration of said first perforated plate, said first lift being carried out along a path inclined at an angle α of 1 to 10 ° with respect to a horizontal plane,
- a first dewatering of said solid granular material rich in filiform particles with flow of said aqueous phase through said first perforated plate and gravity recovery of said aqueous phase under said first vibrating screen so that the aqueous phase and said granular material solid rich in filiform particles circulate relative to each other by counteracting at said perforated plate, and
- recovering said granular material in filiform particles drained. This method is characterized in that, during the vibration of said first perforated plate, said solid granular material rich in filiform particles bounces on the screen and bypasses protrusions coming out of said perforated plate upwards (from above or from the side) ,
ladite première remontée est effectuée selon une trajectoire moyenne inclinée d'un angle de 1 à 10° par rapport à un plan horizontal.said first ascent is carried out according to an average trajectory inclined at an angle of 1 to 10 ° with respect to a horizontal plane.
Comme on peut le constater, le procédé selon l'invention permet donc, comme mentionné ci-avant un égouttage et éventuellement un rinçage d'une matière granulaire solide riche en particules filiformes dans lequel la matière granulaire solide riche en particules filiformes remonte la plaque perforée vers la portion de queue, sous l'effet de vibration, elle est répartie de manière homogène ce qui favorise le résultat de l'égouttage et éventuellement du rinçage en réduisant le colmatage des orifices. De plus, selon l'invention et également pour réduire les colmatages, la matière granulaire riche en particules filiformes remonte ladite plaque perforée d'orifices qui présente une inclinaison allant de 1 à 10° par rapport au plan horizontal passant par ladite médiane transversale. Une telle inclinaison permet avantageusement d'éviter que, sous l'effet de la gravité, des matières filiformes ne s'accumulent au niveau des orifices lui faisant face de l'autre côté des saillies, ce qui pourrait sinon entraîner le colmatage de ces derniers.As can be seen, the process according to the invention thus allows, as mentioned above, a dewatering and optionally a rinsing of a solid granular material rich in filiform particles in which the solid granular material rich in filiform particles back the perforated plate towards the tail portion, under the effect of vibration, it is distributed in a homogeneous manner which favors the result of dripping and possibly rinsing by reducing the clogging of the orifices. In addition, according to the invention and also to reduce clogging, the granular material rich in filiform particles back said perforated orifice plate which has an inclination ranging from 1 to 10 ° relative to the horizontal plane passing through said transverse median. Such inclination advantageously avoids that, under the effect of gravity, threadlike materials do not accumulate at the orifices facing it on the other side of the projections, which could otherwise lead to the clogging of the latter. .
Dans une forme de réalisation particulière, le procédé selon l'invention comprend également :
- un retournement de ladite matière granulaire solide riche en particules filiformes, après la première remontée de ladite matière granulaire solide riche en particules filiformes sur ladite première plaque perforée dudit premier tamis vibrant, sur une deuxième plaque perforée d'une deuxième tamis vibrant,
- une deuxième remontée par ladite matière granulaire solide riche en particules filiformes de ladite deuxième plaque perforée dudit deuxième tamis vibrant, avant ladite récupération avec un deuxième égouttage de ladite matière granulaire solide riche en particules filiformes au travers de ladite deuxième plaque perforée.
- a reversal of said solid granular material rich in filiform particles, after the first rise of said solid granular material rich in filiform particles on said first perforated plate of said first vibrating screen, on a second perforated plate of a second vibrating screen,
- a second rise by said solid granular material rich in filiform particles of said second perforated plate of said second vibrating screen, before said recovery with a second dewatering of said solid granular material rich in filiform particles through said second perforated plate.
De préférence, ladite deuxième remontée est effectuée selon une trajectoire moyenne inclinée d'un angle de 1 à 10°, de préférence de 1 à 5° par rapport à un plan horizontal.Preferably, said second ascent is carried out according to an average trajectory inclined at an angle of 1 to 10 °, preferably 1 to 5 ° relative to a horizontal plane.
De préférence, ladite première remontée est effectuée selon une trajectoire moyenne inclinée d'un angle de 1 à 5° par rapport audit plus horizontal.Preferably, said first lift is carried out along an average path inclined at an angle of 1 to 5 ° relative to said horizontal.
Avantageusement, lors de ladite deuxième remontée, ladite matière granulaire solide riche en particules filiformes rebondit sur le tamis et contourne des saillies sortant de ladite plaque perforée vers le haut (par le dessus ou par le côté).Advantageously, during said second ascent, said solid granular material rich in filiform particles bounces on the sieve and bypasses protrusions coming out of said perforated plate upwards (from above or from the side).
Dans un mode de réalisation préférentiel du procédé selon l'invention, ladite phase aqueuse s'écoule au moins au travers d'orifices présent sur lesdites saillies faisant face à ladite portion de queue.In a preferred embodiment of the method according to the invention, said aqueous phase flows at least through orifices present on said projections facing said tail portion.
De manière préférentielle, ladite phase aqueuse récupérée est recyclée en vue d'une réutilisation à ladite alimentation en phase aqueuse.Preferably, said recovered aqueous phase is recycled for reuse in said aqueous phase feed.
De préférence, dans le procédé selon l'invention, lors de ladite première et/ou deuxième remontée, la matière granulaire solide riche en particules filiformes est en outre rincée par une phase aqueuse alimentée au-dessus de ladite première et/ou deuxième plaque perforée respectivement.Preferably, in the process according to the invention, during said first and / or second ascent, the solid granular material rich in filiform particles is further rinsed with an aqueous phase fed above said first and / or second perforated plate respectively.
D'autres modes de réalisation du procédé selon l'invention sont décrits dans les revendications annexées.Other embodiments of the method according to the invention are described in the appended claims.
L'invention se rapporte également à une utilisation d'un dispositif selon l'invention pour égoutter une matière granulaire solide riche en particules filiformes et éventuellement rincer une matière granulaire solide riche en particules filiformes.The invention also relates to a use of a device according to the invention for draining a solid granular material rich in filiform particles and optionally rinsing a solid granular material rich in filiform particles.
D'autres formes d'utilisation sont mentionnées dans les revendications annexées.Other forms of use are mentioned in the appended claims.
Sur les figures, les éléments identiques ou analogues portent les mêmes références.In the figures, identical or similar elements bear the same references.
La
La
La
La
Comme on peut le voir à la
La plaque perforée 2 présente une portion de tête 3 et une portion de queue 4 et, au vu de l'inclinaison précitée, la portion de tête 3 est plus basse que la portion de queue 4, et est donc située sous le plan horizontal susdit. En conséquence, la portion de queue 4 est située au-dessus du plan horizontal susdit.The
Le dispositif selon l'invention comprend une alimentation en matière granulaire solide riche en particules filiformes 5, chargée en particules fines. La dite matière granulaire solide riche en particules filiformes 6 chargée en particules fines est de préférence issue d'un traitement de déchets métalliques en voie humide et comprend donc une phase aqueuse également.The device according to the invention comprises a feed of solid granular material rich in
Dans la forme de réalisation illustrée à la
La grille perforée est mue sous l'effet d'un moteur qui lui confère une amplitude, une fréquence et un sens de vibration agencé pour faire remonter la matière granulaire solide riche en particules filiformes 6 de la portion de tête 3 vers la portion de queue 4 où elle sera ensuite récupérée, éventuellement pour un traitement ultérieurThe perforated grid is moved under the effect of a motor which gives it an amplitude, a frequency and a direction of vibration arranged to raise the solid granular material rich in
La phase aqueuse provenant d'une part de la matière granulaire solide riche en particules filiformes 6 issue du traitement de déchet métallique en voie humide et/ou d'autre part des alimentations en phase aqueuse 7 rince la matière granulaire solide riche en particules filiformes 6 qui remonte le tamis vibrant 1 vers la portion de queue 4 et la phase aqueuse s'écoule soit sur la plaque perforée 2, soit au travers d' orifices 9 et ensuite dans l'auge 13 située au bas du tamis vibrant. Elle est alors récupérée par un dispositif adéquat 14 et convoyée pour être ensuite traitée et/ou recyclée suivant la flèche B de la
La plaque perforée 2 du tamis vibrant 1 comprend en outre des saillies 8 obtenues par emboutissage de manière à obtenir une forme de tuile, c'est-à-dire des saillies 8 vers le haut présentant une surface supérieure en dôme, comme on peut le voir à la
La hauteur des orifices comprise généralement entre 200 µm et 3 mm. L'orifice longitudinal 9 fait face à la portion de queue 4.The height of the orifices generally between 200 microns and 3 mm. The
Du côté de la saillie 8 faisant face à la portion de tête 3, dans cette forme de réalisation préférentielle, se trouve une face inclinée, courbée ou non, pleine, c'est-à-dire sans orifice de façon à éviter que les particules filiformes de la matière granulaire solide riche en particules filiformes 6 ne se coincent dans les orifices et colmatent la plaque perforée 2 au niveau de ses orifices 8.On the side of the
Comme on peut le voir à la
La
Le dispositif illustré comporte un premier et un deuxième tamis vibrant 1,1' comprenant respectivement une première et une deuxième plaque perforée 2,2'. Bien entendu, un tel dispositif peut également comprendre plus de deux tamis vibrants disposés en série et en escalier, par exemple trois.The illustrated device comprises a first and a second vibrating
Dans la forme de réalisation préférentielle, chacun des trois tamis vibrant disposé en série, et en escalier comporte deux plaques perforées disposées bout à bout en série d'environ 1,7 m de largeur sur 2 m de long. Ceci permet donc d'avoir 3 tamis vibrants en escalier, comportant chacun deux tôles perforées, de 4 m de long sur 1,7 m de largeur pour un rinçage et/ou égouttage sur 12 m de long. Dans les dispositifs connus, Il n'était pas possible de prévoir une telle longueur de crible/égouttage car le crible était trop vite colmaté. Avec le dispositif selon l'invention qui ne souffre pas de colmatage, on peut avantageusement prévoir de rincer le premier côté de la matière granulaire solide riche en particules filiformes sur les deux plaques perforées du premier tamis vibrant, de rincer le deuxième côté de la matière granulaire solide riche en particules filiformes sur les deux plaques perforées du deuxième tamis vibrant grâce au retournement de celle-ci et ensuite d'égoutter, sans rinçage additionnel, la matière granulaire solide riche en particules filiformes sur les deux plaques perforées du troisième tamis vibrant pour atteindre un rendement de rinçage et égouttage optimal.In the preferred embodiment, each of the three vibrating screens arranged in series, and in staircase comprises two perforated plates disposed end to end in series about 1.7 m wide by 2 m long. This therefore makes it possible to have three vibrating screens in steps, each comprising two perforated sheets, 4 m long and 1.7 m wide for rinsing and / or draining over 12 m long. In known devices, it was not possible to provide such a length of sieve / drip because the sieve was too quickly clogged. With the device according to the invention which does not suffer from clogging, it is advantageous to rinse the first side of the solid granular material rich in filiform particles on the two perforated plates of the first vibrating screen, to rinse the second side of the material. solid granular material rich in filiform particles on the two perforated plates of the second vibrating screen through the overturning thereof and then drain, without additional rinsing, solid granular material rich in filiform particles on the two perforated plates of the third vibrating screen for achieve optimal rinsing performance and drainage.
Revenant à la
Il est entendu que si la matière granulaire est illustrée comme étant alimentée à la portion de tête 3 du premier tamis vibrant 1, ceci n'est en aucune façon limitatif. En effet, la matière granulaire solide riche en particules filiformes à égoutter pourrait également être alimentée à d'autres endroits, par exemple dans une partie plus centrale.It is understood that if the granular material is illustrated as being fed to the
Sous l'effet des vibrations, la matière granulaire solide riche en particules filiformes rebondit et remonte le premier tamis vibrant 1 incliné d'un angle α par rapport à l'horizontale (compris avantageusement entre 1 et 5°). La matière granulaire solide riche en particules filiformes peut être rincée par une phase aqueuse alimentée par des jets de rinçage 7 qui pulvérisent la phase aqueuse lors de sa remontée du premier tamis vibrant 1. Lorsque la matière granulaire solide riche en particules filiformes atteint la portion de queue, elle chute sur le deuxième tamis vibrant 1' par retournement afin de pouvoir permettre le rinçage de l'autre côté de la matière granulaire solide riche en particules filiformes.Under the effect of the vibrations, the solid granular material rich in filiform particles bounces and raises the first vibrating
Le deuxième tamis vibrant 1' comporte par exemple une deuxième plaque perforée 2' qui est inclinée d'un angle α', identique ou différent par rapport à α mais de préférence compris entre 1 et 5°.The second vibrating screen 1 'comprises for example a second perforated plate 2' which is inclined at an angle α ', which is identical or different with respect to α but preferably between 1 and 5 °.
La matière granulaire solide riche en particules filiformes rebondit et remonte le deuxième tamis vibrant 2' où elle peut être avantageusement rincée par une phase aqueuse alimentée par des jets de rinçage 7. Les différents jets de rinçage 7 peuvent pulvériser la même phase aqueuse ou des phases aqueuses différentes qui peuvent être de l'eau, une solution aqueuse acide, basique, détergente ou neutralisante. La position de tête 3 du deuxième tamis vibrant 1' est située sous la portion de queue 4 du premier tamis vibrant 1, en chevauchement partiel de sorte que lorsque la matière granulaire solide riche en particules filiformes atteint la portion de queue 4, elle retombe et se retourne sur le deuxième tamis vibrant 1' où elle est récupérée. L'espacement entre les tamis vibrants étant dimensionné en fonction de la coupe granulométrique de la matière granulaire solide riche en particules filiformes, afin que celle-ci puisse se retourner d'un demi-tour pour un rinçage optimal.The solid granular material rich in filiform particles rebounds and raises the second vibrating screen 2 'where it can be advantageously rinsed by an aqueous phase supplied by rinsing
Dans la forme de réalisation illustrée, la matière granulaire solide riche en particules filiformes est récupérée par chute dans un bac de récupération 15 en vue d'un conditionnement ultérieur ou d'un traitement ultérieur situé sous la portion de queue 4 du deuxième tamis vibrant. La phase aqueuse pénètre les orifices 9 des saillies 8 de la première et deuxième plaque perforée 2,2' et est récupérée dans l'auge 13 au-dessous par gravité pour s'écouler ensuite dans un dispositif de récupération de phase aqueuse 14 en contre-courant suivant la direction B par rapport à la matière granulaire solide riche en particules filiformes (direction A).In the illustrated embodiment, the solid granular material rich in filiform particles is recovered by dropping into a
La
Lavage d'un concentré polymétallique issu d'une installation de concentration gravimétrique en milieu dense (eau-magnétite), fortement contaminé par de la magnétite résiduelle de granulométrie inférieure à 300 µm (particules fines).Washing of a polymetallic concentrate from a gravimetric concentration plant in a dense medium (water-magnetite), highly contaminated with residual magnetite with a particle size of less than 300 μm (fine particles).
Pour cette application, une largeur des ouvertures de 30 mm et une hauteur de 500 µm ont été retenu. Des jets d'eau de rinçage ont été placés au-dessus du vibrant afin de nettoyer les particules. Un escalier a également été placé afin de provoquer le retournement des particules. Chaque tamis vibrant était incliné d'un angle de 2° par rapport à l'horizontale. Le tamis vibrait à une fréquence de 6,25 Hz et présentait une amplitude de mouvement de 25 mm. La matière granulaire solide riche en particules filiformes présentait une vitesse d'avancement d'environ 0,2 m/sec et la capacité de rinçage était comprise entre 20 et 30 m3/h.For this application, a width of the openings of 30 mm and a height of 500 microns were retained. Jets of rinsing water were placed above the vibrator to clean the particles. A staircase has also been placed to cause the flipping of the particles. Each vibrating screen was inclined at an angle of 2 ° to the horizontal. The sieve vibrated at a frequency of 6.25 Hz and had a range of motion of 25 mm. The solid granular material rich in filiform particles had a forward speed of about 0.2 m / sec and the rinsing capacity was between 20 and 30 m 3 / h.
Le produit à laver présente une forte contamination en magnétite à la surface des fragments métalliques.The product to be washed shows a strong magnetite contamination on the surface of the metal fragments.
Le produit après lavage est relativement exempt de magnétite. Il sort du vibrant correctement égoutté sans qu'aucun colmatage de la plaque perforée n'ait été observé. De plus, la pulpe (mélange eau-magnétite) obtenue au bas du vibrant peut être traitée et recyclée ; l'eau pouvant resservir au lavage et la magnétite pouvant réintégrer le procédé de séparation gravimétrique en milieu dense.The product after washing is relatively free of magnetite. It leaves the vibrator properly drained without any clogging of the perforated plate was observed. In addition, the pulp (water-magnetite mixture) obtained at the bottom of the vibrator can be treated and recycled; the water can be reused in the washing and the magnetite can reintegrate the gravimetric separation process in a dense medium.
Il est bien entendu que la présente invention n'est en aucune façon limitée aux formes de réalisations décrites ci-dessus et que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.It is understood that the present invention is in no way limited to the embodiments described above and that many modifications can be made without departing from the scope of the appended claims.
Par exemple, les orifices et saillies de la grille peuvent présenter d'autres formes et tailles que celles décrites ici, par exemple en fonction de la matière granulaire solide riche en particules filiformes à traiter.For example, the orifices and projections of the grid may have other shapes and sizes than those described here, for example depending on the solid granular material rich in filiform particles to be treated.
Claims (14)
- A device for draining and optionally rinsing a solid granular material rich in filiform particles (6) and filled with fine particles, comprising:- a first vibrating screen (1) comprising a plate (2) perforated with orifices (9) comprising a transverse median (X), said perforated plate (2) having an incline (α) of from 1 to 10° relative to the horizontal plane passing through said transverse median (X), a head portion (3) and a tail portion (4), said head portion (3) being situated below said horizontal plane of said first vibrating screen (1) and said tail portion (4) being situated above said horizontal plane of said first vibrating screen (1),- a supply (5) of said solid granular material rich in filiform particles (6) and filled with fine particles arranged to supply said solid granular material rich in filiform particles (6) on the head portion (3) of said first vibrating screen (1),- at least one supply of an aqueous phase (7) to eliminate said fine particles by driving,- an outlet for said drained solid granular material rich in filiform particles (6), arranged to recover (14) said solid granular material rich in filiform particles (6) at said tail portion (4), and- an outlet for said aqueous phase filled with fine particles by gravity, under said first vibrating screen (1),characterized in that
said plate (2) perforated with orifices (9) has protrusions (8) oriented upward from the face of said perforated plate (2) receiving said solid granular material rich in filiform particles (6), said protrusions (8) each being provided with at least one orifice (9). - The device according to claim 1, further comprising a second vibrating screen (1') comprising a plate (2') perforated with orifices (9) comprising a transverse median (X), said perforated plate (2') having an incline (α') relative to the horizontal plane passing through said transverse median (X), a head portion (3) and a tail portion (4), said head portion (3) being situated below said horizontal plane of said second vibrating screen (2') and below said tail portion (4) of said first vibrating screen (1) and said tail portion (4) being situated above the horizontal plane of said first vibrating screen (1); and wherein the outlet for said drained solid granular material rich in filiform particles (6) is connected to said tail portion (4) of said second vibrating screen (1').
- The device according to claim 1 or claim 2, wherein said incline (α, α') is chosen in the range of 1 to 5°.
- The device according to claim 3, wherein each protrusion (8) provided with at least one of said orifices (9) has a tile shape, said at least one of said orifices (9) facing said tail portion (4).
- The device according to any one of claims 1 to 4, comprising at least one supply of an aqueous phase (7) separated from said solid granular material rich in filiform particles (6) in order to rinse said solid granular material rich in filiform particles (6) present on said perforated plate (2).
- A method for draining and optionally rinsing a solid granular material rich in filiform particles (6) and filled with fine particles comprising:- a supply (5) of said solid granular material rich in filiform particles (6) filled with fine particles on a first vibrating screen (1) in a head portion (3) of a first perforated plate (2),- a first rise of said solid granular material rich in filiform particles (6) onto said first perforated plate (2) having a transverse median (X) of said first vibrating screen (1) toward a tail portion (4), by vibration of said first perforated plate (2), said first rise being done along a trajectory inclined by an angle (α) of 1 to 10° relative to a horizontal plane,- a first draining and optionally a first rinsing of said solid granular material rich in filiform particles (6) with a flow of said aqueous phase through said first perforated plate (2) and recovery (14), by gravity, of said aqueous phase below said first vibrating screen (1) such that the aqueous phase and said solid granular material rich in filiform particles (6) flow countercurrent to one another at said perforated plate (2), and- a recovery (14) of said granular material rich in drained filiform particles (6),characterized in that, during said vibration of said first perforated plate (2), said solid granular material rich in filiform particles (6) abuts on protrusions (8) emerging upward from said perforated plate (2).
- The method according to claim 6, further comprising:- a reversal of said solid granular material rich in filiform particles (6), after said first rise of said solid granular material rich in filiform particles (6) on said first perforated plate (2) of said first vibrating screen (1), onto a second perforated plate (2') of a second vibrating screen (1'),- a second rise by said solid granular material rich in filiform particles (6) from said second perforated plate (2') of said second vibrating screen (1'), before said recovery (14) with a second draining of said solid granular material rich in filiform particles (6) through said second perforated plate (2').
- The method according to claim 6 or claim 7, wherein said first rise is done along a mean trajectory inclined by an angle (α) of 1 to 5° relative to said horizontal plane.
- The method according to claim 7 or 8, wherein said second rise is done along a mean trajectory inclined by an angle (α') from 1 to 10°, preferably from 1 to 5° relative to a horizontal plane.
- The method according to one of claims 6 to 9, wherein, during said second rise, said solid granular material rich in filiform particles (6) abuts on protrusions (8) emerging upward from said perforated plate (2').
- The method according to any one of claims 6 to 10, wherein said aqueous phase flows at least through orifices (9) present on said protrusions (8) facing said tail portion (4).
- The method according to any one of claims 6 to 11, wherein said recovered aqueous phase is recycled for reuse for said supply of aqueous phase (7).
- The method according to any one of claims 6 to 12, wherein during said first and/or second rise, the solid granular material rich in filiform particles (6) is further rinsed by an aqueous phase supplied above said first and/or second perforated plate (2, 2'), respectively.
- A use of a device according to any one of claims 1 to 5, to drain and optionally rinse a solid granular material rich in filiform particles (6).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2010/0696A BE1019649A5 (en) | 2010-11-22 | 2010-11-22 | DEVICE AND METHOD FOR RINSING-DRAINING SOLID GRANULAR MATERIALS, RICH IN PARTICULAR FILIFORMS (IE METAL CABLES). |
PCT/EP2011/070665 WO2012069464A1 (en) | 2010-11-22 | 2011-11-22 | Device and process for draining/rinsing solid granular materials that are rich in wire-like particles (i.e. metal cables) |
Publications (2)
Publication Number | Publication Date |
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EP2643100A1 EP2643100A1 (en) | 2013-10-02 |
EP2643100B1 true EP2643100B1 (en) | 2015-02-18 |
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Application Number | Title | Priority Date | Filing Date |
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EP11790744.4A Active EP2643100B1 (en) | 2010-11-22 | 2011-11-22 | Apparatus and process for rinsing and dewatering solid granular materials rich in threadlike particles, like metal cables |
Country Status (6)
Country | Link |
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EP (1) | EP2643100B1 (en) |
BE (1) | BE1019649A5 (en) |
DK (1) | DK2643100T3 (en) |
ES (1) | ES2536283T3 (en) |
PT (1) | PT2643100E (en) |
WO (1) | WO2012069464A1 (en) |
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CN104525356A (en) * | 2014-12-27 | 2015-04-22 | 高庆泽 | Cradle easy to assemble and disassemble |
GB201703396D0 (en) * | 2017-03-02 | 2017-04-19 | Mccloskey Int Ltd | An improved vibrating screener |
CN107185804A (en) * | 2017-05-24 | 2017-09-22 | 青海万加环保新材料有限公司 | One kind is wet sieving to use vibratory sieve |
KR102072646B1 (en) * | 2017-11-28 | 2020-02-03 | 송순철 | Separation net for yellow mealworm beetle |
Family Cites Families (4)
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US2237491A (en) | 1938-09-20 | 1941-04-08 | William H Kutz | Shaker screen |
FR1461603A (en) * | 1965-10-26 | 1966-02-25 | Wringing screen | |
DE19515349C2 (en) * | 1995-04-26 | 1997-04-24 | Peter Dieckmann | Device for separating a feed material consisting of thicker and thinner solid particles of different shape and / or density into at least two components |
GB0714391D0 (en) * | 2007-07-24 | 2007-09-05 | Axiom Process Ltd | Vibratory screening apparatus |
-
2010
- 2010-11-22 BE BE2010/0696A patent/BE1019649A5/en active
-
2011
- 2011-11-22 PT PT117907444T patent/PT2643100E/en unknown
- 2011-11-22 WO PCT/EP2011/070665 patent/WO2012069464A1/en active Application Filing
- 2011-11-22 EP EP11790744.4A patent/EP2643100B1/en active Active
- 2011-11-22 DK DK11790744.4T patent/DK2643100T3/en active
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EP2643100A1 (en) | 2013-10-02 |
ES2536283T3 (en) | 2015-05-22 |
PT2643100E (en) | 2015-06-01 |
BE1019649A5 (en) | 2012-09-04 |
WO2012069464A1 (en) | 2012-05-31 |
DK2643100T3 (en) | 2015-05-18 |
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