US3503846A - Apparatus for bleaching wood pulp - Google Patents

Apparatus for bleaching wood pulp Download PDF

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Publication number
US3503846A
US3503846A US567561A US3503846DA US3503846A US 3503846 A US3503846 A US 3503846A US 567561 A US567561 A US 567561A US 3503846D A US3503846D A US 3503846DA US 3503846 A US3503846 A US 3503846A
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United States
Prior art keywords
pulp
chemicals
blades
rotor
chamber
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Expired - Lifetime
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US567561A
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English (en)
Inventor
Franco Nardi
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.)
I C L SOC AGRICOLA IND PER LA
Saicl Soc Agricola Ind Per La Cellulosa Italiana Spa
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I C L SOC AGRICOLA IND PER LA
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/56—Mixing liquids with solids by introducing solids in liquids, e.g. dispersing or dissolving
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/712—Feed mechanisms for feeding fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7175—Feed mechanisms characterised by the means for feeding the components to the mixer using propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/32—Hammer mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F2025/91—Direction of flow or arrangement of feed and discharge openings
    • B01F2025/912—Radial flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
    • B01F2101/47—Mixing of ingredients for making paper pulp, e.g. wood fibres or wood pulp
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/27—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices
    • B01F27/271—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator
    • B01F27/2711—Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices with means for moving the materials to be mixed radially between the surfaces of the rotor and the stator provided with intermeshing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
    • B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
    • B01F33/83612—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by crushing or breaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7181—Feed mechanisms characterised by the means for feeding the components to the mixer using fans or turbines

Definitions

  • An apparatus for bleaching a thick semi-chemical pulp having a concentration higher than 3549% of dry matter by the use of chemicals having an oxidizing action only having a stationary casing with one inlet for the thick pulp and at least one inlet for the chemicals.
  • a chamber wherein the reaction is brought to completion has an outlet.
  • a rotor is supported for rotation in the casing and has an impeller-like structure comprising two concentric sections, of which the inner one is fitted with centrifugating blades, while the outer section is fitted with a plurality of spaced pins of projections, designed to intercept the flow of air which is centrifugated by said blades.
  • the maximum diameter of the outer section is at least one and a half times greater than the maximum diameter of the inner section.
  • the chemical inlet opens into the chamber adjacent to the inner section of the rotor.
  • the rotor is vertically journalled and the chamber is formed with an inlet flared axial port.
  • a feeding unit is eoaxially secured to the rotor and extends partly into the axial port and is fitted with helical blades to obtain a first coarse fragmentation and a uniform feeding of thick pulp into the chamber.
  • This invention relates to an equipment for the processing of pulps obtained from woods, and possibly from other vegetals, as e.g. cane, bagasse and the like, in order to have same pulps efliciently bleached, by means of chemicals, by which an oxidizing action only is exerted, as e.g. the mixtures of chemicals, wherein hydrogen peroxide is present.
  • the equipment according to the invention is particularly designed for processing pulps of the so-called semichemical type, and is intended to have thick and very thick semi-chemical pulps thoroughly mixed with chemicals by which an oxidizing action only is exerted, in bleaching processes of the type as disclosed and claimed in the copending Patent Application Nardi et al. Process for Bleaching of Pulps Obtained From Vegetal Essences, Ser. No. 5 67,616 filed July 25, 1966.
  • the pulps obtained from vegetal sources, and in particular the semi-chemical pulps are processed under conditions of high consistency, corresponding to concentrations of an order in the range of 40% and more of dry matter contents, thereby to obtain material advantages from both technical and economical viewpoints, as stated in more details in said co-pending patent application.
  • the main object of this invention consists in the provision of an equipment, that is designed to exert a mechanical action both on the pulp to be bleached, and which is fed thereto under said conditions of high consistency, and to the oxidizing chemicals, that are utilized in a liquid condition, thereby to obtain a thorough and intimate mixing of all particles and fibres of the pulp, with said chemicals, and thus to ensure a uniform and eflicient reaction in practically all points of raw pulp, in order to obtain a uniformly bleached pulp, suitable for making sufiiciently and uniformly white papers and pasteboards.
  • a further object of the invention is the provision of an equipment as stated above, that is designed to exert mechanical actions and effects as required for the intended purposes, without causing changes in the fluidity degree of pulp, i.e. without any modification in the Schopper-Riegler number.
  • the equipment according to the invention is substantially designed in such a manner as to have both the pulp and the chemicals simultaneously and uniformly acted upon, in order to obtain the splitting of pulp into elemental fibers and small fiber bundles, or at any rate into minute particles, while the chemicals are nebulized, whereby the thus dispersed pulp and the nebulized chemicals are brought and maintainedeven if for a very short timein suspension-in a violently agitated and vorticated atmosphere, whereby to ensure a substantially uniform distribution of said particles and of said chemicals throughout said atmosphere.
  • the main object of this invention consists in the provision of an equipment which is substantially characterized in that it comprises mechanical means, fitted whithin a chamber, that is formed with inlet ports for the thick pulp and for the liquid chemicals, as well as with outlet ports for the pulp fibres whereon and/or between which the chemicals are uniformly dispersed, being said means designed to cause a nebulization of said chemicals, a very fine dispersion of pulp, and a strong whirling motion of the air in the chamber, wherein the pulp fibres and the chemicals are thus suspended under conditions of substantially uniform distribution.
  • such mechanical means consist of a rotary unit comprisive of centrifugating devices, splitting devices and whirling devices.
  • Said centrifugating devices are on turn comprisive of a crown of centrifugating blades, located in the cen tral section of said rotary unit, and that is essentially realized under the form of a centrifugating rotor, to which the thick pulp is axially fed.
  • the splitting and whirling devices consist on turn of projections, e.g. under the form of pins, arranged in rings in the outer section of same rotary unit, and which peripheral speed'is consequently higher than that of centrifugating blades.
  • the air current wherein the discrete pulp fibers and the nebulized chemicals are kept in a substantially uniform dispersion, is discharged through one, or possibly more .ports, which are tangentially directed in respect of said peripheral portion.
  • the chemical inlet ports are located and directed in such a manner as to have same chemicals fed directly to the depression and action zone of the centrifugating blades, by which therefore, the task of nebulizing same chemicals is also performed.
  • an auxiliary crown of blades is provided on the perimetraljportion of the rotary unit, in order to complete the centrifugating action exerted on the air current, wherein the pulp fibers and the nebulized reagents are uniformly suspended.
  • the outer edges of such blades, or at least of one 'of them are provided with bits of a very hard material, e.g. of high speed steel, carbides or the like, in order to have all scales which may form on said inner wall, continuously scraped off.
  • said rotary unit is fitted in such a manner as to be turned round a vertical axis, and the thick pulp is axially fed from above thereto.
  • the rotary unit is moreover comprisive of a feeder, revolvingly fitted in the axial bore through which the pulp is fed, and equipped with spiral blades, that are designed to perform a twofold task, i.e. to make the feeding of pulp into the mechanical processing chamber more regular and uniform, and to bring about a first, gross fragmentation of the large clots of pulp (which is previously expressed in order to bring it to the required concentration) thereby preventing possible cloggings, or at any rate possible troubles in the feeding.
  • FIG. 1 is a side view of an equipment according to the invention, that forms a part of a plant of the type as disclosed in the previously stated co-pending patent application.
  • FIG. 2 is a view, partly sectioned on a diametral plane, of the main operating unit of said equipment.
  • FIG. 3 is an exploded view of same unit, which main components are shown in views part sectioned on the planes and lines IIIIII-III in the FIG. 4.
  • FIG. 4 is an axial view from above, partly'sectioned on the horizontal plane IVIVIV in the FIG. 2, of same unit.
  • the equipment indicated in its entirety by the letter D, is comprisive of a casing or shell, that is suitably supported, e.g. through a hollow column C, by a base B, wherein the prime mover is fitted.
  • prime mover may be e.g. an electric motor, as required for driving the hereinafter described mechanical components of said equipment.
  • the drive may be advantageously effected by a belt transmission, that can be properly adjusted by a belt stretcher, operated by a handwheel V.
  • the different components, that are designed to perform merely structural or driving tasks, shall not be described in more detail, since they are already known, and are not covered by the invention.
  • the casing or stator of the equipment D is approximately similar to the casing of stator of already well known centrifugal pumps, and is formed with an axial inlet port E, and a tangential outlet port U, as well as with a flare-shaped section S, showing a number of inlet ports P, arranged on a circle, and designed for the introduction of required chemicals in the form of a liquid, and preferably also of steam.
  • Said equipment D - is located at the outlet end of a channel for feeding the thick pulp (that is obtained, 'g'
  • the considered equipment is comprisive of a rotary unit or rotor 10 (see FIG. 3), running inside said casing, that is made-up by a bottom section 11, having an inner, shallow circular chamber, and by a top section 12, having a cylindrical channel 13, that is connected with said inlet port E, a flare-shaped portion S with the pipe connections for the inlet ports through which the chemicals and steam are fed, and an outer flange 14 by which said top section is tightly secured to the outer edge 15 of bottom section 11.
  • the mouth of the tangential outlet passage U (see FIG. 3) is formed as in 17 on the essentially cylindrical inside wall 16 of the circular chamber.
  • Said inlet passages P for the chemicals and the steam have their outlets 18 (see FIGS. 2 and 3) in the stator inside, on the inner wall 19 of the flare-shaped section S, and thus in a zone wherein a depression is prevailing when the rotor 10 is turning.
  • Said rotor 10 essentially consists of a discoid body 20, having a central hub 21, by which it is fitted on the top end 22 of driving shaft 23, which is revolvingly supported within the hollow column C.
  • Said body 20 is upwardly flared, and is connected with a tapered ogival component 24, which rotates along with the rotor, and that extends for a given length inside the cylindrical inlet channel 13, and the component 24 is fitted with a plurality of spiral blades 25.
  • the unit 24, 25 is designed to ensure a uniform and regular feed of the thick pulp into the chamber wherein the rotor is operating, and to provide also for a first coarse fragmentation of larger crumbs, which may be formed as a consequence of the water squeezing action which is being exerted directly upstream of the considered equipment.
  • a plurality of blades 26 are fitted in the central section of the rotor, and in particular near the flare-shaped portion 21 of disk 20.
  • the structure and operation of said rotor central portion are essentially similar to those of an impeller of a centrifugal pump or fan.
  • the outlets 18 of the chemicals and steam inlet passages P are located and directed in such a manner as to bring the chemicals and steam directly under the action of the centrifugating blades 26.
  • Fitted on the flat outer edge of disk 20 are a plurality of projections, preferably arranged in more concentric rows or'crown, and consisting of metal pins 27, having preferably but not necessarily a polygonal cross-section, e.g.
  • auxiliary blades 28 by which the centrifugating action of the air current, and of the particles suspended therein, is completed, and this air is also urged into the outlet passage U. Bits of a hard material are fitted on the outer edge of at least one of said blades 28, whereby to have the scales and deposits that may be progressively formed on the stator inner wall 16, continuously scraped-off.
  • the diameter of the outer pin row may be close to the double of the outer diameter of the row of blades 26. Consequently, the air threads and the particles that are kept suspended in the air flow produced by said blades are intercepted and broken by projections that are running at a much higher linear speed.
  • the thick pulp that uniformly flows downward through the cylindrical channel 13, is cut into small chips when contacted by the top edges of centrifugating blades 26, by which the chemicals, flowing from 18 near same edges, are simultaneously nebulized.
  • a centrifugal condition is produced in the central section of the mechanical treatment chamber, by said blades 26, in an essentially smooth flowing current of air, wherein the pulp chips and the nebulized chemicals are suspended, being thus by the air flow tangentially urged beyond the side edge of the blades 26.
  • the annular zone above the outer flat portion of disk 20 is flooded by the air current carrying the pulp chips in suspension, whereby same current is beaten, in a plurality of points, by the pins 27, that are running at higher linear speed, whereby a large number of uniformly distributed whirls are produced in said current and consequently the further broken, small pulp chips to be processed, are thoroughly mixed with the nebulized chemicals.
  • the different components are dimensioned as a function of the throughput of the plant wherein the equipment is designed to operate.
  • the r.p.m. of the rotor shall be selected in a suitable reversed ratio to diameters of their sections, in order to attain the most convenient tangential speeds.
  • rotors having a max. diameter of about 800 mm. can be fitted, and in such a case the centrifugating blades 26 may have an operating diameter of about 35 -400 mm., while the pins are arranged in more concentric rows, having diameters ranging from about 450 up to 700 mm.
  • a rotor dimensioned as above, allows attaining the most convenient processing conditions when driven at a speed in the range of 1500-2000 r.p.m., and preferably of 1700 r.p.m.
  • An apparatus for bleaching a thick semi-chemical pulp having a concentration higher than 3540% of dry matter by the use of chemicals having an oxidizing action comprising a stationary casing having an inlet for said pulp, and an inlet for said chemicals, a chamber in said casing wherein the reaction is brought to completion having an outlet; means for feeding the material in said chamber and providing a first coarse fragmentation, a rotor supported for rotation in said casing having an impeller-like structure comprising an inner section, an outer section concentric to said inner section, said inner section having centrifugating blades to ensure centrifugation where said blades operate, said outer section having a plurality of spaced peripheral pins to provide minute fragmentation of the centrifugated material and a finely subdivided swirling motion of the gaseous atmosphere in which the particles and chemicals are suspended; to secure a homogeneous distribution of particles of said pulp and said pins catching the gases and particles and tangentially centrifugating them into and through said outlet in said chamber.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
US567561A 1965-10-25 1966-07-25 Apparatus for bleaching wood pulp Expired - Lifetime US3503846A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT1048365 1965-10-25
IT2381565 1965-10-25
IT1480365 1965-10-25

Publications (1)

Publication Number Publication Date
US3503846A true US3503846A (en) 1970-03-31

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US567561A Expired - Lifetime US3503846A (en) 1965-10-25 1966-07-25 Apparatus for bleaching wood pulp

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US (1) US3503846A (de)
BE (1) BE681488A (de)
DE (1) DE1546283A1 (de)
FI (1) FI43528B (de)
FR (1) FR1498761A (de)
SE (1) SE318184B (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3917176A (en) * 1974-04-10 1975-11-04 Ingersoll Rand Co Disintegrating-and-blowing apparatus for material such as pulp
US3929320A (en) * 1973-05-07 1975-12-30 Escher Wyss Ltd Foundry mixing machine
US3964962A (en) * 1974-02-25 1976-06-22 Ingersoll-Rand Company Gaseous reaction apparatus and processes including a peripheral gas receiving chamber and a gas recirculation conduit
US4209359A (en) * 1978-10-23 1980-06-24 International Paper Company Process for removing residual oxygen from oxygen-bleached pulp
EP0124431A1 (de) * 1983-04-22 1984-11-07 E. + M. Lamort Société Anonyme dite: Stofflöserrotoren
US5322357A (en) * 1991-05-28 1994-06-21 Abbott Laboratories Apparatus for blending a powder with a liquid
US20030103852A1 (en) * 2001-12-04 2003-06-05 Levitronix Llc Dispensing apparatus for a fluid
US20060133195A1 (en) * 2002-12-12 2006-06-22 Metso Paper, Inc. Apparatus for mixing
US20060140049A1 (en) * 2002-12-12 2006-06-29 Metso Paper, Inc. Apparatus for mixing
EP2367623A2 (de) * 2008-12-16 2011-09-28 H R D Corporation Wachsoxidierung mit hoher scherung
US20160023173A1 (en) * 2013-08-30 2016-01-28 Lg Chem, Ltd. Impeller mixer of electrode slurry
WO2016124164A1 (de) * 2015-02-04 2016-08-11 Ika - Werke Gmbh & Co. Kg Mischvorrichtung mit integrierter förderpumpe
EP3069786A1 (de) * 2015-03-20 2016-09-21 Silverson Machines Limited Vorrichtung und verfahren zum mischen mit hoher scherkraft
WO2017025073A1 (de) * 2015-08-13 2017-02-16 Netzsch-Feinmahltechnik Gmbh Vorrichtung und verfahren zum dispergieren mindestens einer substanz in einem fluid
EP4338826A1 (de) * 2022-09-15 2024-03-20 BAUER Spezialtiefbau GmbH Vorrichtung und verfahren zum mischen eines weichgelmediums

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435085A (en) * 1982-08-06 1984-03-06 Ingersoll-Rand Company Mixer for use in pulp processes
AU4404285A (en) * 1984-05-15 1985-12-13 Flinck Karl-Evert Method of bleaching fibre pulp for the production of paper and paperboard
AT388193B (de) * 1987-06-12 1989-05-10 Andritz Ag Maschf Mischer
EP0305707B1 (de) * 1987-09-02 1991-10-16 BABCOCK-BSH AKTIENGESELLSCHAFT vormals Büttner-Schilde-Haas AG Mischer zum Herstellen von Mörtel aus feinkörnigen Bindemitteln, insbesondere Gips
AT395180B (de) * 1989-08-16 1992-10-12 Andritz Ag Maschf Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US635480A (en) * 1898-07-30 1899-10-24 Hermann Heinrich Grain-scourer.
US2859110A (en) * 1956-03-26 1958-11-04 Fibreboard Paper Products Corp Method and apparatus for treatment of waste paper stock
US3194540A (en) * 1961-07-28 1965-07-13 Liberty Nat Bank And Trust Com Homogenizing apparatus
US3284055A (en) * 1963-07-05 1966-11-08 Kamyr Ab Mixing apparatus, particularly for mixing of bleaching agents into cellulosic pulp
US3337191A (en) * 1964-02-17 1967-08-22 Kaiser Gypsum Company Inc Apparatus for mixing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US635480A (en) * 1898-07-30 1899-10-24 Hermann Heinrich Grain-scourer.
US2859110A (en) * 1956-03-26 1958-11-04 Fibreboard Paper Products Corp Method and apparatus for treatment of waste paper stock
US3194540A (en) * 1961-07-28 1965-07-13 Liberty Nat Bank And Trust Com Homogenizing apparatus
US3284055A (en) * 1963-07-05 1966-11-08 Kamyr Ab Mixing apparatus, particularly for mixing of bleaching agents into cellulosic pulp
US3337191A (en) * 1964-02-17 1967-08-22 Kaiser Gypsum Company Inc Apparatus for mixing

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929320A (en) * 1973-05-07 1975-12-30 Escher Wyss Ltd Foundry mixing machine
US3964962A (en) * 1974-02-25 1976-06-22 Ingersoll-Rand Company Gaseous reaction apparatus and processes including a peripheral gas receiving chamber and a gas recirculation conduit
US3917176A (en) * 1974-04-10 1975-11-04 Ingersoll Rand Co Disintegrating-and-blowing apparatus for material such as pulp
US4209359A (en) * 1978-10-23 1980-06-24 International Paper Company Process for removing residual oxygen from oxygen-bleached pulp
EP0124431A1 (de) * 1983-04-22 1984-11-07 E. + M. Lamort Société Anonyme dite: Stofflöserrotoren
US5322357A (en) * 1991-05-28 1994-06-21 Abbott Laboratories Apparatus for blending a powder with a liquid
US20030103852A1 (en) * 2001-12-04 2003-06-05 Levitronix Llc Dispensing apparatus for a fluid
US20050226746A1 (en) * 2001-12-04 2005-10-13 Levitronix Llc Dispensing apparatus for a fluid
US20060133195A1 (en) * 2002-12-12 2006-06-22 Metso Paper, Inc. Apparatus for mixing
US20060140049A1 (en) * 2002-12-12 2006-06-29 Metso Paper, Inc. Apparatus for mixing
US7384185B2 (en) * 2002-12-12 2008-06-10 Metso Paper, Inc. Apparatus for mixing a chemical medium with a pulp suspension
US7384184B2 (en) * 2002-12-12 2008-06-10 Metso Paper, Inc. Apparatus for mixing a chemical medium with a pulp suspension
EP2367623A2 (de) * 2008-12-16 2011-09-28 H R D Corporation Wachsoxidierung mit hoher scherung
EP2367623A4 (de) * 2008-12-16 2013-04-24 H R D Corp Wachsoxidierung mit hoher scherung
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EP3505230A1 (de) * 2015-02-04 2019-07-03 IKA - Werke GmbH & Co. KG Mischvorrichtung mit integrierter förderpumpe
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CN107438477B (zh) * 2015-02-04 2021-07-09 艾卡工厂有限及两合公司 具有集成输送泵的混合装置
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JP2018522727A (ja) * 2015-08-13 2018-08-16 ネッツシュ−ファインマールテヒニック ゲーエムベーハー 少なくとも１種の物質を流体中に分散させるための装置及び方法
CN107921382A (zh) * 2015-08-13 2018-04-17 耐驰精细研磨技术有限公司 用于使至少一种物质在流体中分散的装置和方法
CN107921382B (zh) * 2015-08-13 2021-09-07 耐驰精细研磨技术有限公司 用于使至少一种物质在流体中分散的装置和方法
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Also Published As

Publication number Publication date
BE681488A (de) 1966-10-31
DE1546283A1 (de) 1969-09-25
FI43528B (de) 1970-12-31
FR1498761A (fr) 1967-10-20
SE318184B (de) 1969-12-01

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