US3519130A - Apparatus for classifying of finegrained solids in wet condition - Google Patents

Apparatus for classifying of finegrained solids in wet condition Download PDF

Info

Publication number
US3519130A
US3519130A US667515A US3519130DA US3519130A US 3519130 A US3519130 A US 3519130A US 667515 A US667515 A US 667515A US 3519130D A US3519130D A US 3519130DA US 3519130 A US3519130 A US 3519130A
Authority
US
United States
Prior art keywords
sieve
sieves
liquid
classifying
conical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US667515A
Other languages
English (en)
Inventor
Waclaw Jachna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26652803&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US3519130(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from PL116558A external-priority patent/PL56220B1/pl
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3519130A publication Critical patent/US3519130A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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

  • Classification of finest aggregates is especially diflicult, particularly in the case of aggregates containing grains being near colloidal size or being of fibrous character.
  • One of the first such methods employs a conical sieve known as Radialsiebstrom.
  • the sieve used in this method is also divided into a plurality of zones in the same manner as the previously discussed device.
  • the suspension is preliminarily deprived of liquid and finest grains in the upper part of the sieve and is then washed in the second zone on the conical surface of the sieve by means of showers or sprays.
  • arcuate sieve The most modern and broadly propagated method of classification consists in using of an apparatus known as an arcuate sieve. In this case the partitioning of the apparatus into classification zones is impossible, as opposed to the above-discussed methods.
  • this apparatus gives a low accuracy of classification although it has a great ability in drawing-off the liquid, together with finest particles, from the working surface unit. This imperfection in accuracy is caused by a low efiiciency in draining-off the liquid. For this reason the upper product from arcuate sieves is finally classified on Vibrating screens provided with showers in order to obtain an accurate classification.
  • Another method in which arcuate sieves are used employs several arcuate sieves each of which is fed material at an equal rate.
  • the degree of accuracy is defined, in one system of measurement, by the ratio of the 50% graduated grain to the graduated grain. The higher this ratio, the more efiicient the apparatus. For arcuate sieves, this ratio averages 0.55 and for sieves 080 this ratio is within the range of 0.6O .7.
  • This invention relates to apparatus for classifying finegrained solid aggregates in wet condition by the employment of a method using several sieves disposed one after the other.
  • the inventive method is carried out in two or more steps and is characterized in that material being classified in fluid or powdered state is supplied to a rotating ring of washing liquid on the entire periphery of the ring in order to set the material in motion.
  • the action of centrifugal force on the material being classified rapidly mixes the material with the wash liquid and as a result of a comparatively great overspeed of the liquid, the layer of liquid and solid particles is quite thin so that the fine grains are drained 01f with the liquid.
  • the product partially deprived of fine grains can then be reintroduced into the next rotating washing liquid stream and flows onto the sieve surface of the second stage where nearly all fine grains are carried off.
  • FIG. 1 is section of one embodiment of the apparatus according to the invention, in which sieves are disposed in series.
  • FIG. 2 is section of another embodiment of the apparatus according to the invention.
  • the apparatus of FIG. 1 for classifying according to the inventive method comprises one or more sieving stages of frustro conical form and with each conical sieve disposed upside down.
  • the conical sieving elements of the lowermost stage or of the individual stages, near their largest diameter or base portion in area 1 are made of profiled bars disposed in parallel to the generating line of the 3 conical sieve. Near the smaller diameter end or base they are provided with slits in area 2 disposed almost perpendicularly to the generating line of the conical sieve.
  • the suspension passes the slits at a right or oblique angle which is advantageous in that it greatly lessens the possibility that the slits will become clogged.
  • the wearing rate of the lower sieve with openings perpendicular to the generating line will be unsymmetrical however, the small amount of centrifugal force and the low speed of motion of solid parts in this area causes the wearing rate to be smaller than that of the upper sieve having slits parallel to the generating line.
  • the lower sector of the sieve in area 2 with slits perpendicular to the generating line gives smaller graduated grain than that from the upper sieve area 1 with parallel slits. This property can be put to a good use in various assemblies of sieve constructions.
  • the mixture of solid parts contained in the liquid is to be divided. This is performed on the apparatus being described hereabove, but which is additionally provided with a sieve 12 with slits parallel to the generating line and mounted in a first stage guiding element or trough and also being provided with additional mixture inlets '11 for introducing the mixture to be classified.
  • the guiding element 4 is partitioned by means of a horizontal ring 10 into an upper part for the mixture to be classified, and into a lower part for the washing liquid.
  • the present invention includes a sieve 14 around the upper opening in a cover 13 of the first stage guiding element.
  • the apparatus of this invention for carrying out the accurate classification or for classifying the liquid feed into several grain classes with the use of a washing liquid, includes one or more sieving stages connected with one another by means of circular troughs 3, 4 having one or more tangential feedings elements 5 and 6 for feeding the washing liquid.
  • An additional stage may be constituted by a circular trough 4 having uniform cross section and provided with a sieve 12 and by a tangential feeding element 11 for feeding the mixture 4 to be classified as Well as the washing liquid through inlet pipe 6.
  • Each washing liquid circular trough is provided with conical deflecting rings 8 and 9 which have only their lower portions illustrated for directing the material to be classified into a rotating liquid stream, and the Whole is placed in a housing constituting a collecting tank for the filtrate.
  • the material can be fed from element 11 or in some cases may be gravity fed from a position above and axially in line with the axis or conical rings 8 and 9.
  • the said collecting tank may be common for all screening stages or it may be inwardly positioned by horizontal and vertical ring shaped or cylindrical surfaces 15 into several separated tanks for collecting the filtrate from beneath the individual screening stages or from parts thereof.
  • the last-mentioned construction is of advantage in cases when the division of the feed into several classes of grains is required, because apart from the difference in the width of the slits, the size of the grains carried off can be influenced by creating in the individual tanks a defined pressure either above or below the atmospheric pressure.
  • the apparatus for accurate classification with washing liquid may also be adapted for superposed screening with or without washing liquid.
  • the collecting tanks of the screening stages except the uppermost one are connected to the outlet nozzle of the next above stage, in this case the collecting tanks constituting feeding and swelling reservoirs as shown in FIG. 2.
  • the superposed system is of great value due to the fact that it provides a classification accuracy degree which is higher than that obtained with a simple tandem system.
  • the individual screening stages have of course to be provided with separate means for draining off the upper product.
  • An advantage of the screen arrangement shown in FIG. 2 consists, among others, by the inclusion of removable partitions 15 between the screen stages and outlets 18. After supplying to the inlets 19 of the second and subsequent stages of the mixture to be wet classified, a parallel work of a series of screen stages is obtained. Another advantage of this arrangement is the small area occupied by the equipment.
  • Said system is in principle sufficient to prevent grains of defined size to pass to the filtrate and the filtrate to the main product.
  • a flexible sealing pad is located in the labyrinth trough and pressed down by the dead load of the screening element.
  • FIGS. 1 and 2 show an example of mounting a vibrating motor 20 for creating axial oscillations of the sieve elements.
  • a vibrating motor 20 for creating axial oscillations of the sieve elements.
  • one of several vibration drives may be used, making use of the idea shown in FIGS. 1 and 2.
  • An additional advantage of the use of a vibration drive is the increase of the rate of draining off the liquid and preventing the upper product to collect in the lower part of the sieve.
  • the excitation of oscillations may be a continuous or a periodic one.
  • the virbation drives are adapted to change the amplitude of the excitation force and of its frequency as required by the dilferent materials.
  • Outlets 16 are provided in the embodiment of FIG. 2 for the purpose of discharging drained products in a manner analagous to the operation of outlets 16 in the FIG. 1 embodiment.
  • Apparatus for classifying by grain size friable material comprising an inverted conical sieve, a plurality of profiled bars disposed in a first area of said sieve adjacent the upper part thereof corresponding to the base of the conical geometric configuration of the sieve and oriented in parallel relationship to the generating line of the sieve so as to provide slots also oriented parallel to the generating line of the sieve, a second area of said sieve forming the lower portion thereof comprising bars essentially perpendicular to the generating line of the conical sieve and providing slots oriented essentially perpendicular to said generating line of the sieve, a circular trough oriented above the sieve and coaxial therewith, and a plurality of tangential fluid inlets providing means associated with said circular trough for providing a rotating ring of washing liquid in said circular trough for gravitationally receiving material to be classified and for subsequently gravitationally depositing said material and said washing liquid into the upper portion of said sieve for enabling classification of said material as to size.
  • each of said troughs comprises an outer peripheral wall and a downwardly inclined slanted floor portion.

Landscapes

  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Combined Means For Separation Of Solids (AREA)
US667515A 1966-09-21 1967-09-13 Apparatus for classifying of finegrained solids in wet condition Expired - Lifetime US3519130A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL116558A PL56220B1 (enrdf_load_stackoverflow) 1966-09-21
PL118657A PL56209B1 (enrdf_load_stackoverflow) 1967-01-24

Publications (1)

Publication Number Publication Date
US3519130A true US3519130A (en) 1970-07-07

Family

ID=26652803

Family Applications (1)

Application Number Title Priority Date Filing Date
US667515A Expired - Lifetime US3519130A (en) 1966-09-21 1967-09-13 Apparatus for classifying of finegrained solids in wet condition

Country Status (9)

Country Link
US (1) US3519130A (enrdf_load_stackoverflow)
BE (1) BE704168A (enrdf_load_stackoverflow)
CS (1) CS161833B2 (enrdf_load_stackoverflow)
DE (1) DE1301226B (enrdf_load_stackoverflow)
FR (1) FR1553777A (enrdf_load_stackoverflow)
GB (1) GB1198835A (enrdf_load_stackoverflow)
NL (1) NL141406B (enrdf_load_stackoverflow)
NO (1) NO120930B (enrdf_load_stackoverflow)
SE (1) SE325542B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319424A1 (fr) * 1975-07-28 1977-02-25 Ts Osrodek P Procede de separation d'un melange de grains de mineraux dans un milieu aqueux et dispositif pour sa mise en oeuvre
US4204949A (en) * 1978-12-08 1980-05-27 Centralny Osrodek Projektowokonstrukcyjny Maszyn Gorniczych KOMAG Device for wet classification of a mixture of solid components according to size
US4514300A (en) * 1982-08-16 1985-04-30 Centrum Mechanizacji Gornictwa "Komag" Dehydrating centrifugal sieve
US4810270A (en) * 1985-10-24 1989-03-07 Kimberly-Clark Corporation Separator
RU2261582C1 (ru) * 2004-03-16 2005-10-10 Воронежский государственный аграрный университет им. К.Д. Глинки Распределитель зернового вороха
CN114433460A (zh) * 2022-02-10 2022-05-06 山东土秀才生物科技有限公司 一种制备土壤修复剂的多级筛分装置

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3515891A1 (de) * 1985-05-03 1986-11-06 Hein, Lehmann AG, 4000 Düsseldorf Siebvorrichtung
JPS62193608A (ja) * 1986-02-21 1987-08-25 Katsuhiko Gunji ろ過装置
CA2127605A1 (en) * 1993-12-23 1995-06-24 Peter J. Degen Affinity separation method
RU2134619C1 (ru) * 1997-08-29 1999-08-20 ОАО "Рудгормаш" Гидрогрохот
RU2134618C1 (ru) * 1997-08-29 1999-08-20 ОАО Рудгормаш Гидрогрохот
DE29718949U1 (de) * 1997-09-11 1998-01-08 Ing. Walter Hengst GmbH & Co KG, 48147 Münster Filter, insbesondere Regenwasserfilter
RU189222U1 (ru) * 2019-02-20 2019-05-16 Николай Николаевич Арефьев Гидрогрохот
CN113198714B (zh) * 2021-03-17 2022-06-10 江苏振强机械科技股份有限公司 一种矿用循环式细料筛分装置

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US170471A (en) * 1875-11-30 Improvement in pulp-strainers
US527860A (en) * 1894-10-23 Hermann friedrich martin kayser
US1774644A (en) * 1927-05-07 1930-09-02 Gesnel Charles Alfred Sifting machine
BE546647A (enrdf_load_stackoverflow) * 1951-09-25 1956-04-14 van Gent Sas
GB823828A (en) * 1956-11-09 1959-11-18 Ciments D Obourg An improved method and apparatus for filtering or screening thick sludges, for example raw cement slurries
US2974796A (en) * 1957-09-04 1961-03-14 Jung Johannes Centrifugal-type pulp separator
US2998137A (en) * 1959-02-13 1961-08-29 Vane Zdenek Centrifugal screen
US3045823A (en) * 1957-09-04 1962-07-24 Stamicarbon Process and apparatus for separating a mixture of particles according to size
US3061098A (en) * 1960-07-18 1962-10-30 Beloit Iron Works Centrifugal classifier and stock cleaner
CA678037A (en) * 1964-01-14 J. Fontein Freerk Device for wet screening a mixture of fine solid particles suspended in a liquid
US3232436A (en) * 1961-02-09 1966-02-01 Nilsson Nils Gunnar Holger Straining apparatuses
US3247965A (en) * 1963-05-07 1966-04-26 Kimberly Clark Co Vertical centrifugal screen for pulp stock

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1272101A (fr) * 1960-08-09 1961-09-22 Lorraine Houilleres Trieur hydraulique pour matières granulaires et pulvérulentes
DE1232005B (de) 1964-12-31 1967-01-05 B Prejektow Zakladow Przerobki Sieb zum Klassieren und/oder Entfernen von Schuettgut aus Fluessigkeiten

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US170471A (en) * 1875-11-30 Improvement in pulp-strainers
US527860A (en) * 1894-10-23 Hermann friedrich martin kayser
CA678037A (en) * 1964-01-14 J. Fontein Freerk Device for wet screening a mixture of fine solid particles suspended in a liquid
US1774644A (en) * 1927-05-07 1930-09-02 Gesnel Charles Alfred Sifting machine
BE546647A (enrdf_load_stackoverflow) * 1951-09-25 1956-04-14 van Gent Sas
GB823828A (en) * 1956-11-09 1959-11-18 Ciments D Obourg An improved method and apparatus for filtering or screening thick sludges, for example raw cement slurries
US2974796A (en) * 1957-09-04 1961-03-14 Jung Johannes Centrifugal-type pulp separator
US3045823A (en) * 1957-09-04 1962-07-24 Stamicarbon Process and apparatus for separating a mixture of particles according to size
US2998137A (en) * 1959-02-13 1961-08-29 Vane Zdenek Centrifugal screen
US3061098A (en) * 1960-07-18 1962-10-30 Beloit Iron Works Centrifugal classifier and stock cleaner
US3232436A (en) * 1961-02-09 1966-02-01 Nilsson Nils Gunnar Holger Straining apparatuses
US3247965A (en) * 1963-05-07 1966-04-26 Kimberly Clark Co Vertical centrifugal screen for pulp stock

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319424A1 (fr) * 1975-07-28 1977-02-25 Ts Osrodek P Procede de separation d'un melange de grains de mineraux dans un milieu aqueux et dispositif pour sa mise en oeuvre
US4071440A (en) * 1975-07-28 1978-01-31 Centralny Osrodek Projektowokonstrukcyjny Maszyn Gorniczych "Komag" Method and apparatus of stratification with tangential feed
US4204949A (en) * 1978-12-08 1980-05-27 Centralny Osrodek Projektowokonstrukcyjny Maszyn Gorniczych KOMAG Device for wet classification of a mixture of solid components according to size
US4514300A (en) * 1982-08-16 1985-04-30 Centrum Mechanizacji Gornictwa "Komag" Dehydrating centrifugal sieve
US4810270A (en) * 1985-10-24 1989-03-07 Kimberly-Clark Corporation Separator
RU2261582C1 (ru) * 2004-03-16 2005-10-10 Воронежский государственный аграрный университет им. К.Д. Глинки Распределитель зернового вороха
CN114433460A (zh) * 2022-02-10 2022-05-06 山东土秀才生物科技有限公司 一种制备土壤修复剂的多级筛分装置
CN114433460B (zh) * 2022-02-10 2023-10-31 山东土秀才生物科技有限公司 一种制备土壤修复剂的多级筛分装置

Also Published As

Publication number Publication date
GB1198835A (en) 1970-07-15
NO120930B (enrdf_load_stackoverflow) 1970-12-28
NL6712888A (enrdf_load_stackoverflow) 1968-03-22
SE325542B (enrdf_load_stackoverflow) 1970-07-06
DE1301226B (de) 1969-08-14
CS161833B2 (enrdf_load_stackoverflow) 1975-06-10
FR1553777A (enrdf_load_stackoverflow) 1969-01-17
BE704168A (enrdf_load_stackoverflow) 1968-02-01
NL141406B (nl) 1974-03-15

Similar Documents

Publication Publication Date Title
US3519130A (en) Apparatus for classifying of finegrained solids in wet condition
US3437204A (en) Screening apparatus
SU1192632A3 (ru) Вращающеес устройство дл сортировки массы с вертикальным давлением
US3898157A (en) Two stage pressure pulp screen device with stationary cylindrical screen
US2913114A (en) Process and an apparatus for separating solids from suspensions of solids in fluids
US4543180A (en) Device for separating coarse and fine particles from ultrafines
US3392828A (en) Separation of substances
US2033123A (en) Method and apparatus for refining
US3306671A (en) Method and apparatus for feeding material handling devices
US3905894A (en) Apparatus for wet fine screening
US3485363A (en) Plural deck center discharge separator
US1749368A (en) Continuous separation of liquids and solids
US3633743A (en) Process and apparatus for classifying fibres
US4477349A (en) Metalurigical slag filtering apparatus
US3532276A (en) Drum screen for fertilizer
US2748951A (en) Device for separating solid particles from liquids
RU2087200C1 (ru) Центробежный сепаратор периодического действия
CN105964535A (zh) 一种柔性均匀布料的振动式筛选机
SU1036244A3 (ru) Способ непрерывного удалени порошкового или кускового материала из цилиндрического бункера
US3373875A (en) Apparatus for screening pulp
US2610737A (en) Process of and apparatus for strictly limited separation of mixtures by the speed of fall in liquid media
US2199848A (en) Centrifugal mechanism
US3135690A (en) Apparatus for separating liquid from a mixture of granular material and liquid
US2880870A (en) Pressure screening
JPH09508574A (ja) 遠心分離装置