WO1986000027A1 - Appareil pour deshydrater des gateaux de masse filtrante d'argile - Google Patents

Appareil pour deshydrater des gateaux de masse filtrante d'argile Download PDF

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Publication number
WO1986000027A1
WO1986000027A1 PCT/US1985/001088 US8501088W WO8600027A1 WO 1986000027 A1 WO1986000027 A1 WO 1986000027A1 US 8501088 W US8501088 W US 8501088W WO 8600027 A1 WO8600027 A1 WO 8600027A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrically conductive
clay
conveying mechanisms
clay material
conductive conveying
Prior art date
Application number
PCT/US1985/001088
Other languages
English (en)
Inventor
Albert C. Kunkle
Edgar J. Maxwell, Iii
Original Assignee
J.M. Huber Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by J.M. Huber Corporation filed Critical J.M. Huber Corporation
Priority to BR8506777A priority Critical patent/BR8506777A/pt
Publication of WO1986000027A1 publication Critical patent/WO1986000027A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
    • B01D61/56—Electro-osmotic dewatering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
    • B01D33/042—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering whereby the filtration and squeezing-out take place between at least two filtering bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/06—Filters making use of electricity or magnetism

Definitions

  • This invention relates in general to an apparatus for removing water from clay and, in particular, to an apparatus for electro inetically removing water from a clay cake as the clay cake passes through the apparatus along a predetermined path of movement.
  • this invention relates to a dewatering apparatus through which a clay cake is directed while exposed to an electrokinetic field, to remove a portion of the water from the clay cake and thereby increase the solids content of the cake.
  • Clays such as kaolin, are widely used as adsorbents, pigments, catalysts, paper fillers and the like. Such clay generally occurs in geological deposits as a mixture with inert foreign materials from which it is desirable for certain commercial applications to separate the clay material before the clay is utilized.
  • One method of separation of the clay from the inert foreign materials is effected by dispersing the crude clay and water with the aid of dispersing chemicals such as sodium silicate, sodium hexametaphosphate, sodium tripolyphosphate and tetrasodium pyrophosphate and such clay slurry is then blunged, degritted, classified and leached to effect removal of the undesired foreign materials.
  • the clay is filtered to remove the dispersing and leaching chemicals, and a somewhat solid filter cake containing 50% to 60% clay solids is produced. This 50% to 60% clay solids cake is then redispersed and sprayed dried or otherwise dried in the flocculated state.
  • Such rotary drum vacuum filters generally comprise a filter drum having a filter medium mounted on the external surface of the drum.
  • the drum is rotatably mounted on a casing or housing with a vacuum being maintained within the drum interior.
  • the drum rotates in a liquid in which solids material is suspended and, as the drum is rotated, the vacuum within the drum causes the liquid to pass through the filter medium on the external surface into the interior of the drum. A solid filter cake is thereby formed on the filter surface while the liquid filtrate is removed from the interior of the drum.
  • Such filtration separates the liquid solids suspension into two parts: (1) a liquid filtrate which has passed through the filter medium on the exterior surface of the drum and which may contain a low concentration of solids material, dependent upon the material from which the filter medium is formed, and (2) a filter cake which is supported on the filter medium and which contains 30% or more, and generally 40-50%, of entrained suspension liquor.
  • an apparatus for electrokinetically treating a clay material having a solids content considerably less than 70% solids material is provided.
  • the clay material is directed along a predetermined path of movement while exposed to electrokinetic forces which remove the water from the clay material, while the material is transported through the field, to discharge a clay cake having a higher solids content than the material entering the apparatus and preferably at least substantially 70%.
  • an object of this invention to improve the processing of clay to obtain a refined clay filter cake having a solids content of at least substantially 70% solids.
  • Another object of this invention is to electrokinetically treat a flocculated clay material by electroosmotically removing water from the clay solids material .
  • a further object of this invention is to electroosmotically separate water from flocculated clay material, without subjecting the resultant filter cake to pressures sufficient to adversely effect the physical form of the filter cake from which the water is being removed.
  • an electrokinetic dewatering apparatus including a pair of oppositely electrically charged continuously traveling webs or belts positioned to contact a quantity of clay material passed into a nip formed at the inlet of the apparatus.
  • the clay cake is continuously contacted by the two electrode belts or webs and passes therebetween without being subjected to a pressure force substantially in excess of the contact pressure, thereby preventing damage to the clay cake during the electrokinetic separation arid removal of the water contained in the clay cake.
  • FIG. 1 is a mechanical schematic of the apparatus to better illustrate the manner in which the apparatus functions to electroosmotically separate and remove water from a clay cake;
  • FIG. 2 is a frontal planar view of the invention
  • FIG. 3 is an enlarged end profile view of the apparatus shown in FIG. 2 taken along lines 3-3;
  • FIG. 4 is an enlarged partial sectional view of the apparatus shown in FIG. 2 taken along lines 4-4 to better illustrate the manner in which the electrical field is established in the apparatus;
  • FIG. 5 is an enlarged view of a detailed portion of the apparatus shown in FIG. 2 to better illustrate the manner in which the relationship between the two opposing webs is maintained;
  • FIG. 6 is an enlarged view of a portion of the structure to better illustrate the manner in which spacing and contact is maintained.
  • FIGS. 7 and 8 are enlarged views of a tensioning mechanism by which the belts of the apparatus are maintained in a predetermined orientation.
  • the dewatering apparatus includes two electrically conductive endless webs or belts 201 and 301 which are of opposing electrical polarities.
  • the upper belt 201 sometimes referred to as the anode belt, is preferably coated with a material to inhibit corrosion whch might result from contact between the anode belt and wet clay materials.
  • the lower belt 301 forms a cathode, and is perforated or formed with apertures to permit the passage therethrough of water driven from the clay material by electrokinetic forces.
  • the water removed from the clay material is drained through a suitable drain system (not shown in FIG. 1) for disposal or further treatment as desired.
  • a flocculated clay paste containing approximately 55% solids material is fed onto the lower or cathode belt 301 and passes through an entrance nip 101 formed between an upper entrance roller 202, associated with the anode belt 201, and the upper run 303 of the lower cathode belt 301, respectively.
  • the clay paste material is thereafter passed between and in contact with the two oppositely charged electrode belts while subjected to an electrical field for effecting the removal of waste from the clay paste as the material moves between and with the two endless electrode webs or belts
  • the position of the two electrode belts 201 and 301 is maintained in a manner hereinafter to be described in detail, such that the upper belt 201.is in substantially pressure free and continuous contact with the clay material as it advances through the apparatus.
  • This force while sufficient to maintain contact with the clay material at all times, does not exert any external pressure substantially in excess of the contacting force, thereby preventing the clay material from being extruded through the perforations or apertures 306 formed in the lower or cathode web 301.
  • a constant voltage level is maintained between the two oppositely charged electrode webs 201 and 301.
  • the electrical resistance of the clay material increases as the material moves along the path of movement so that the current across the cake so formed decreases as the liquid is removed.
  • the apparatus for removing the liquid from the clay material is shown in detail in FIGS. 2-8.
  • the dewatering apparatus includes a frame structure 100 in which an upper and lower electrode belt assembly 200 and 300, respectively, are supported.
  • a paste of clay material containing approximately 55? solids is fed onto the upper run or surface 303 of electrode belt 301 through a nozzle 10 from a source (not shown) and passes through the entrance nip 101 formed between the two electrode belts by the upper entrance roller 202 and the upper run or surface 303 of the lower electrode belt 301.
  • the linear speed of both the upper and lower electrode belts 201 and 301 is the same, so that the clay paste advances therewith through the apparatus and emerges from the dewatering process. as a high clay solids cake which passes over a lower exit roller 307 of the lower electrode belt 301 into a ' cake breaker, not shown.
  • the equal linear velocity for both the electrode belts 201 and 301 may be effected by using either a common or an independent synchronized drive source in a manner that is known to those skilled in the conveyor art, with any system being suitable as long as there is no relative motion between the two opposing surfaces of the electrode belts.
  • the lower electrode belt assembly 300 includes a horizontally extending frame 305, which is supported by the machine frame structure 100, and has at opposite ends thereof a lower entrance roller 302 and the lower exit roller 307 to define the horizontal run of the lower electrode belt 301.
  • the lower surface of the -upper run 303 of the lower electrode belt 301 is supported by a series of substantially identical support rollers 320 each of which are mounted on the horizontally extending frame member 305 by means of suitable bearing assemblies 325 which are connected to the frame member 305 to permit the rollers 320 to rotate relative thereto.
  • the support rollers 320 function to provide a uniform support for the upper run 303 of the lower electrode belt 301 to maintain a substantially uniformly flat surface for supporting the clay materials carried thereon.
  • a predetermined tension force is maintained on the electrode belt 301 by a tensioning roller mechanism 350 shown in FIG. 2, and in enlarged detail in FIG. 7.
  • the tensioning roller assembly 350 is carried between the upper and lower runs 303 and 304, respectively, of the lower electrode belt 301 and floats vertically in contact with the inner surface of the lower belt run 304.
  • Each end of tensioning roller 351 is rotatably journaled by a suitable bearing block 352 which is carried on a support frame 353 to permit vertical movement of the roller.
  • the support frame 353 is constrained against horizontal movement by means of a pair of vertical guide rods 354 at each end of the frame structure 353.
  • the support frame 353 is formed with a pair of openings 355 at each end through which the guide rods 354 are concentrically mounted to permit only vertical movement of the tensioning roller. In this manner while the tensioning roller 351 will freely float in a vertical direction to gravitationally maintain a predetermined tension in the lower electrode belt 301, the support frame 353 is constrained to vertical movement by the guide rods 354.
  • the clay paste As the clay paste is fed onto the upper run 303 of the lower electrode belt 301, the clay materials advance through the apparatus and liquid is removed from the clay paste by electrokinetic forces established between the upper and lower electrode belts. As this liquid is removed from the clay materials, the clay paste that is fed into the apparatus becomes a clay cake which emerges from the outlet after a portion of the liquid has been electroosmotically removed from the clay materials. As previously disclosed, the lower electrode belt 301 is formed with openings or apertures 306 through which the liquid, driven from the clay material by the electrokinetic action, will pass.
  • an inclined trough 470 is supported from the lower electrode frame member 305 in a position extending beneath the support rollers 320 and the upper run 303 of the lower electrode belt.
  • the trough 470 is positioned between the upper and lower runs 303 and 304, respectively, of the lower electrode 301 belt and is downwardly sloped to a discharge outlet 471 from which the liquid removed from the clay material may be discharged.
  • the electrical charge of the upper and lower electrode belts 201 and 301 is of opposite polarity. While the magnitude of charge may be varied, it has been found preferable to maintain the upper electrode belt 201 charged to a positive level and to maintain the lower electrode belt 301 at ground potential. In this manner, maintaining the lower electrode belt asssembly at ground potential facilitates fabrication of the dewatering apparatus by eliminating the necessity of electrically insulating mechanical support connections between the lower electrode belt assembly 300 and the machine frame 100.
  • FIG. 4 is an enlarged view of a portion of the upper entrance roller 202, it is to be understood that the manner in which an electrical charge is applied to the upper electrode belt 201 through the upper entrance roller 202 is shown for convenience of illustration, and similar structure can be utilized to electrically charge both upper and lower electrode belts 201 and 301, respectively, through both the entrance and the exit roller associated with each of the two upper and lower electrode belt assemblies.
  • each of the upper and lower electrode belt assemblies 201 and 301 may be necessary to maintain a suitable electrical charge on the electrode belts.
  • electrical discontinuities may be formed in the belt which would require multiple sources of electrical charging energy on each belt as through both the entrance and exit rollers associated with each belt.
  • the roller 202 is formed of an electrically conductive material with at least one end thereof having a recessed end cap 211. Each end of the roller 202 is journaled for rotation in a suitable bearing block 212 which is supported from the ends of a horizontally extending frame member 215 carried between the upper and lower runs 203 and 204, respecti ely, of the upper electrode belt 201.
  • the roller 202 and the entire upper electrode assembly 200 are electrically isolated from the machine frame 100 through suitable insulators which permit the upper roller assembly 200 to be supported by, but electrically isolated from, the machine frame structure 100.
  • An electrical charge is imposed on the electrode belt 201 through the recessed roller end cap 211 by means of a brush or wiper contact assembly 230.
  • An electrical conductor or cable 231 providing a source of electrical energy is connected to a plurality of brushes or wiper contacts 232 which are carried on one end of a bracket 233 fixed at its other end to an electrical insulator 234 which electrically isolates the bracket and brushes from the machine frame 100.
  • the brushes 232 are carried in a position within the roller end cap 211, and in contact therewith, so that the desired electrical charge level and polarity will be imposed on the roller 202 thereby charging the electrode belt 201 to the desired voltage level and polarity.
  • a predetermined tension force is imposed on the upper electrode belt 201 to maintain a substantially uniform contact surface between the lower surface of the lower run 204 of the upper electrode belt 201 and the clay material in contact therewith.
  • the tensioning roller assembly 250 Shown in detail in FIG. 8, imposes the tension force on the upper electrode belt 201 and is constructed in a similar manner as the lower tensioning roller assembly 350 associated with the lower electrode belt 301.
  • the support frame 253, which carries the bearing blocks 252 in which the tensioning roller 251 is rotatably journal ed, and the vertical guide rods 254 are carried by the horizontally extending frame member 205 which defines the length of the run of the upper electrode assembly 200.
  • the support frame 253 is connected to one end of a vertically disposed lever arms 255 which has at the other end of the lever arm connected to the "free" end 256 of the lever arm of a weighted lever and fulcrum assembly 260.
  • the lever and fulcrum assembly 260 is carried by the horizontally extending frame member 205 with a plurality of weights 261 carried at one end of a lever arm 262. In this manner the lever arm 262 is biased about a fulcrum 263 in a clockwise direction, as shown in FIGS. 2 and 8, thereby imposing an upward force on the end 256 connected to the lever arm 255.
  • a downward force is imposed on the upper surface of the lower run by means of a plurality of spring loaded idler rollers 220.
  • These rollers 220 are supported from the bottom of the horizontally extending frame member 205 to impose a downward force on the lower run of the electrode belt 201.
  • the magnitude of this force is determined by a pair of springs 221, supporting each end of each roller 220.
  • the force imposed should be sufficient to maintain contact between the lower run 204 of the upper electrode belt and the clay material, but not so great as to extrude the clay material through the perforations or apertures 306 formed in the lower electrode belt 301 through which pass the liquid removed from the clay material.
  • each roller is rotatably journaled at its ends in a suitable bearing block assembly 225.
  • the bearing block assemblies are each suspended from the lower portion of the horizontally extending frame member 205 by means of a pair of 'threaded rods 222, which pass through apertures formed in the bearing block assemblies and are secured to the horizontally extending frame member 205.
  • the bearing block assemblies 225 are movable in a vertical direction relative to the suspending rods 222, and are biased out from the bottom of the horizontally extending frame member 205 into contact with the lower run 204 of the upper electrode belt 201.
  • each rod 222 is secured to the lower portion of the horizontally extending frame member 205, and the other end of the rod is formed with a stop 224 to limit the downward vertical movement of the rollers 220.
  • the upper electrode assembly 200 is suspended from the machine frame 205 by a suspension system 260 including vertically suspended rods 261 which permit the upper electrode belt 201 to be positioned in a manner which converges from the entrance nip 101 towards the exit nip 103 in controlled increments.
  • This suspension system 260 shown enlarged in FIG.
  • the upper end of the threaded rods 261 have connected thereto a pointer 265 which in combination with a reference marker 266, secured to the frame member 105, provides a spacial reference point by which the vertical position of the threaded rod 261 may be vertically adjusted to control the spacing between the lower run 204 of the upper electrode belt 201 and the upper run 303 of the lower electrode belt 301 in accordance with the change in thickness of the clay material to maintain constant contact therewith.
  • the convergent spacing between the upper and lower electrode belts can be fixed by means of the lock nut assembly 267 on each of the threaded rods 261, to maintain contact with the clay material at all times while passing through the apparatus.
  • the clay material will have a sufficient amount of liquid removed therefrom to form a clay cake of at least substantially 70% solids material.
  • This clay cake will pass over the lower exit roller 307 into a cake breaker (not shown) and the electrode belts will continue to rotate continuously processing additional material as it is introduced as a paste through the nozzle 10.
  • the belts 201 and 301 pass through cleaning stations whereat the surface of the belt which contacts the clay material is washed by spraying the surface with water, and then dried by subjecting the belts to the discharge from an air dryer.
  • the belt 301 continues to rotate through a multiple station belt washer assembly 370 (shown in FIG. 2) whereat spray heads 371 direct a spray of water upwards against the belt surface prior to its passing beneath the tensioning roller 351 with the water draining from the belt into a sloped drain pan 372 and out through a drain outlet 373.
  • the belt 301 is then subjected to a multiple stage air dryer 380 whereat air jets 381 discharge air against the belt surface to remove the wash water and substantially dry the belt surface.
  • the upper electrode belt 201 upon passing over the upper exit roller 207 and the upper tensioning roller 251 passes beneath a belt wash station 270 whereat water jets 271 spray recirculated water onto the outer belt surface.
  • the belt 201 is then subjected to an air dryer 280 wherein a discharge of air from air jets 281 which removes any residual wash water and dries the belt sufficiently for further processing.
  • a preferred embodiment incorporates an upper electrode belt 201 of titanium or tantalum substrate with a mixed metal oxide coating including a platinum group metal oxide of the type referred to as a Dimensionally Stable Anode available from Diamond Shamrock Company of Chardon, Ohio.
  • the bottom electrode belt 301 is preferably made of perforated stainless steel with an open area sufficient to pass the electroosmotically removed filtrate and preferably having at least 25? open space.
  • the lower electrode assembly 300 is preferably electrically grounded, for convenience of construction, and the upper electrode assembly 200 is isolated from the machine frame 100, and charged with an electrical voltage sufficient to induce el ect roosmot i c dewatering. In use, a voltage of approximately 4 mv to approximately 20 mv per square inch of effective anode area, or establishing a current density of about .05 amps to about .25 amps per square inch has been found to be satisfactory.
  • the speed at which the belts 201, 301 move in conveying the clay material through the apparatus is dependent upon the length of the parallel run therebetween.
  • a satisfactory belt speed should be such that the clay materials will be retained in the electric field between the belts at least about 1 minute to about 8 minutes or less, as long as such time is effective to remove a sufficient amount of water in order to obtain the desired approximately 70% solids content.
  • the convergence of belt 201 toward belt 301 is such that the belts will always remain in contact with the clay material while the thickness of this material is decreasing as water is removed therefrom. Suitable ranges of convergence have been found in spacing the opening at the entrance nip 101 from between about 1/2 inch to about 3 inches. Accordingly, the exit nip 103 has been spaced between appproximately 1/4 inch and less than about 3 inches.
  • the rate at which the clay paste is introduced into the dewatering apparatus must be sufficient to fill the space between the two electrode belts 201, 301 and maintain contact with the upper belt 201.
  • the actual flow rate at which paste is introduced into the entrance nip 101 will, therefore, vary to accomplish this objective.

Abstract

Appareil de déshydratation électrocinétique, comportant une paire de bandes ou courroies (201), (301) de charge électrique opposée et à déplacement continu, positionnées de manière à entrer en contact avec une certaine quantité de matériau d'argile passant dans un pincement (101) formé à l'entrée de l'appareil de déshydratation. Le gâteau d'argile est en contact continu avec les deux bandes (201) (301) pendant que le gâteau passe entre elles. Le matériau d'argile n'est pas soumis à une force de pression quelconque essentiellement lors d'un excédent de pression de contact pendant la séparation électrocinétique et le retrait d'une partie de l'eau qu'il contient.
PCT/US1985/001088 1984-06-11 1985-06-10 Appareil pour deshydrater des gateaux de masse filtrante d'argile WO1986000027A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR8506777A BR8506777A (pt) 1984-06-11 1985-06-10 Aparelho para retirada de agua de torta de filtro de argila

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61933084A 1984-06-11 1984-06-11
US619,330 1984-06-11

Publications (1)

Publication Number Publication Date
WO1986000027A1 true WO1986000027A1 (fr) 1986-01-03

Family

ID=24481441

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1985/001088 WO1986000027A1 (fr) 1984-06-11 1985-06-10 Appareil pour deshydrater des gateaux de masse filtrante d'argile

Country Status (5)

Country Link
EP (1) EP0185736A4 (fr)
JP (1) JPS61502383A (fr)
AU (1) AU568059B2 (fr)
BR (1) BR8506777A (fr)
WO (1) WO1986000027A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011767A1 (fr) * 1995-09-26 1997-04-03 Steinmuller Mining And Piping Systems (Proprietary) Limited Egouttage electro-osmotique des boues
KR101217753B1 (ko) * 2008-12-22 2013-01-02 알루미늄 오프쇼오 피티이 리미티드 소화기가 내장된 랜딩 패드

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5490232B2 (ja) * 2009-06-15 2014-05-14 ドンイルキャンバスエンジニアリング株式会社 電気浸透式スラッジ減量装置

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US636762A (en) * 1898-10-31 1899-11-14 Owen J Conley Screen conveyer.
US2873028A (en) * 1955-09-06 1959-02-10 Bried Henry Francis Filters
US3381609A (en) * 1966-06-20 1968-05-07 Neil Malarkey Jr. Filter press
US3605607A (en) * 1969-05-14 1971-09-20 Hans Gujer Band filter press
US4003811A (en) * 1974-01-25 1977-01-18 J. M. Huber Corporation Electrokinetic separation of solid particles from aqueous suspensions thereof
US4048038A (en) * 1974-07-08 1977-09-13 J. M. Huber Corporation Electroflocculation cell
US4101400A (en) * 1973-05-29 1978-07-18 Machinefabriek W. Hubert & Co. B.V. Method for dewatering sludge
US4110189A (en) * 1974-07-05 1978-08-29 J. M. Huber Corporation Electro-osmotic/phoretic process for concentrating clay
US4244804A (en) * 1979-01-15 1981-01-13 Innova, Inc. Slime and sludge dewatering
US4266474A (en) * 1978-10-13 1981-05-12 Baehr Albert Chamber type filter press for de-watering sludges and similar substances

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JPS5169268A (ja) * 1974-12-12 1976-06-15 Nippon Steel Corp Denkidatsusuiho
GB2143850B (en) * 1983-07-16 1987-02-25 Lyn Illtyd Davies Llewellyn Thickening coal washery tailings

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US636762A (en) * 1898-10-31 1899-11-14 Owen J Conley Screen conveyer.
US2873028A (en) * 1955-09-06 1959-02-10 Bried Henry Francis Filters
US3381609A (en) * 1966-06-20 1968-05-07 Neil Malarkey Jr. Filter press
US3605607A (en) * 1969-05-14 1971-09-20 Hans Gujer Band filter press
US4101400A (en) * 1973-05-29 1978-07-18 Machinefabriek W. Hubert & Co. B.V. Method for dewatering sludge
US4003811A (en) * 1974-01-25 1977-01-18 J. M. Huber Corporation Electrokinetic separation of solid particles from aqueous suspensions thereof
US4110189A (en) * 1974-07-05 1978-08-29 J. M. Huber Corporation Electro-osmotic/phoretic process for concentrating clay
US4048038A (en) * 1974-07-08 1977-09-13 J. M. Huber Corporation Electroflocculation cell
US4266474A (en) * 1978-10-13 1981-05-12 Baehr Albert Chamber type filter press for de-watering sludges and similar substances
US4244804A (en) * 1979-01-15 1981-01-13 Innova, Inc. Slime and sludge dewatering

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011767A1 (fr) * 1995-09-26 1997-04-03 Steinmuller Mining And Piping Systems (Proprietary) Limited Egouttage electro-osmotique des boues
KR101217753B1 (ko) * 2008-12-22 2013-01-02 알루미늄 오프쇼오 피티이 리미티드 소화기가 내장된 랜딩 패드

Also Published As

Publication number Publication date
EP0185736A1 (fr) 1986-07-02
AU568059B2 (en) 1987-12-10
AU4439885A (en) 1986-01-10
BR8506777A (pt) 1986-11-25
EP0185736A4 (fr) 1987-06-16
JPS61502383A (ja) 1986-10-23

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