US3289950A - Method of and apparatus for grinding moist material - Google Patents

Method of and apparatus for grinding moist material Download PDF

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Publication number
US3289950A
US3289950A US319934A US31993463A US3289950A US 3289950 A US3289950 A US 3289950A US 319934 A US319934 A US 319934A US 31993463 A US31993463 A US 31993463A US 3289950 A US3289950 A US 3289950A
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Prior art keywords
drying
grinding
chamber
gas
section
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US319934A
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English (en)
Inventor
Helming Bernd
Henne Heinrich
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ThyssenKrupp Industrial Solutions AG
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Polysius AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/02—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles
    • F26B11/04—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis
    • F26B11/0463—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall
    • F26B11/0468—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for disintegrating, crushing, or for being mixed with the materials to be dried
    • F26B11/0472—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in moving drums or other mainly-closed receptacles rotating about a horizontal or slightly-inclined axis having internal elements, e.g. which are being moved or rotated by means other than the rotating drum wall for disintegrating, crushing, or for being mixed with the materials to be dried the elements being loose bodies or materials, e.g. balls, which may have a sorbent effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/13—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft and combined with sifting devices, e.g. for making powdered fuel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container
    • B02C17/06—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container with several compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00—Disintegrating plant with or without drying of the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
    • F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried

Definitions

  • the present invention relates to a method of and apparatus for grindingdrying moist material while employing a tube mill operating in a closed circuit with a sitter or separator, which tube mill has associated therewith a built-in drying chamber.
  • the moist material to be ground is first charged into a heated or non-heated hammer mill, impact mill or the like, ⁇ and then passed to a sifter or separator which may likewise be heated.
  • the grits separated by the sifter then are passed to a ball mill the ground product of which is conveyed to the sitter in which, thus, the material from the hammer mill :and the material from the ball mill are sifted together,
  • the ball mill is heated for purposes of drying the material.
  • FIGURES l to 3 diagrammatically illustrate three dif- ,ferent designs of tube mills for carrying ⁇ out the method according to the present invention
  • FIGURE 4 is a diagrammatic illustration of an entire drying-grinding plant.
  • FIG. 5 is a modification ⁇ over the arrangement of FIG. 4.
  • FIG. 6 is a transverse section through the drying chamber, said section being taken along the line A-B of FIG. l.
  • FIG. 7 is a view upon the slot wall of FIG. 1 as seen from the right-hand side of FIG. 1.
  • the present invention consists primarily in carrying out the two operations, viz. the drying and grinding, independently of each other in -a tube mill in such a way that the waste gases of the drying chamber will not affect the grinding chamber.
  • the grinding mill is, along the length thereof, subdivided into a drying chamber and a grinding chamber, While the drying chamber is not filled with grinding bodies but is equipped with lifting elements. Interposed between the said two chambers there is the gas discharge and the material discharge. While, in conformity with the heretofore known practice, the waste gases and the material to be ground are introduced axially in direct current or flow in the same direction, they are no longer passed together through the [grinding chamber. Instead, the gas is already at the end of the drying chamber Withdrawn from the tube mill in radial direction.
  • the sifter - is free from any drying work. It does not have to process too coarse material. In other words, the sifter serves solely its proper purpose, viz. its sifting purpose.
  • one of the outstanding advantages of the invention consists in that the drying and grinding in the interior of the tube mill will be carried out as economically as possible and under the respective most favorable conditions for the drying and grinding.
  • the drying and grinding especially of very moist, sticky material and the employment 'of low-temperature, moist gases will be possible, so that the invention represents a considerable advance in the art.
  • the arrangement shown therein represents a tube mill having a drying chamber 2 into which the moist material to be ground is charged at 1.
  • Rotatable lifting blades 3 on the inside of of the drying chamber 2 bring about a very'intensive engagement of the material in chamber 2 with a drying gas introduced into chamber 2 through an inlet conduit 4.
  • This drying gas is withdrawn from the tube mill through openings 5 at the tube mill portion 6.
  • a portion of the material drops through the openings 5 into a housing 7 and is discharged through the discharge conduit 8.
  • Another portion of the material leaves the fine grinding chamber 9 through the slot wall 10 and combines with the material in the drying chamber 2 -so as, together with the latter, to leave the device through the discharge connection or conduit 8.
  • the total iiow of the material will, with this particular design, 4be passed to a sifter.
  • the coarse particles separated by the sifter are at 11 charged into the fine grinding chamber 9.
  • the fine grinding chamber 9 communicates with a conduit 12 adapted to be charged with fresh air or, if necessary, also with warm gas or warm air.
  • FIG. 2 shows a modification over the arrangement of FIG. l.
  • the material is charged at 1 into the drying chamber 2 and is discharged through openings 5.
  • the waste gas of the drying chamber 2 is also in this instance withdrawn at the end of said drying chamber without the necessity that it has to pass through the fine grinding chamber 9.
  • the milled material in the fine grinding chamber 9 is, however, not combined with the material from the drying chamber 2, but both fiows of material are held separate and are separately discharged through the two discharge conduits 7' and 7".
  • the material from the fine grinding chamber 9 passes through the slot wall 10 and the openings 5 into a separate discharge housing 7
  • the method according to the present invention offers the possibility of feeding the material from the drying chamber 2 into a hammer mill or impact mill of any standard type, or the like, if the material is too coarse for grinding in the fine grinding chamber 9.
  • the thus transferred material is then granulated in said hammer or impact mill or, if desired, may be post-dried and then subjected to sifting and post-grinding.
  • the milled material from fine grinding chamber 9 is expediently combined with the material from the hammer mill, is then sifted, and the sifted-out coarse portion is introduced into the fine grinding chamber 9 at 11 and finish-ground.
  • the method according to the invention may also be employed in connection with a tube mill of the type shown in FIG. 3 in which the material to be ground is adapted to pass to a granulating chamber and subsequently into a second grinding chamber, viz. the fine grinding chamber.
  • the moist material to be ground is charged at 1 into the drying chamber 2.
  • rotatable lifter blades 3 bring about an intensive engagement of the material with the drying gases which enter at 4 and are discharged or withdrawn through the openings 5 and discharge conduit 6.
  • the material leaving the drying chamber 2 passes through a sifting cylinder 13 and is then conveyed from lifting wall 14 into the rst grinding chamber -granulating chamber 15.
  • the fine material passes through openings 5 into the collecting housing 7.
  • the three flows Iof material and, more specifically, the fine material from the drying chamber 2, the pre-granulated material from the first grinding chamber 15, and the postground material from the fine grinding chamber 9 are withdrawn through conduit 8 and are conveyed to a common sifter (not illustrated).
  • the coarse portion leaving the sifter is introduced into the fine grinding chamber 9 at 11 whereby the circuit of the drying-grinding operation is closed.
  • the charge of the tube mill with drying gas and fresh air is effected in the above-described manner.
  • an additional control member 18 is provided in the discharge connection 6 in order to control the speed of the flowing gaseous media in the various chambers, in conformity with the respective requirements.
  • FIG. 4 An example of a drying-grinding plant for carrying out the method according to the present invention is illustrated in FIG. 4.
  • the moist material to -be ground is charged into a funnel 1 from where it passes onto a conveyor 19 which in its turn feeds the material into the tube mill 20.
  • a conveyor 19 Arranged within the drying chamber 2 are movable lifter blades 3 which produce a considerable turbulence of the material in the tube mill 20 so as to intimately subject the material to heating gases introduced into the drying chamber 2.
  • the thus pre-dried material is by means of a bucket conveyor 21 conveyed to the heated hammer mill 22.
  • a conveyor worm 23 conveys the finish or nearly finish-dried material to the fine grinding chamber 9 of the tube mill 20.
  • the milled material is received by a bucket conveyor 24 which discharges the milled material into a sirter 25.
  • the grit from the sifter 25 passes together with the material from the hammer mill 22 to the fine grinding chamber 9 of the tube mill 20, whereas the finished material or powder is in a gas ow withdrawn from the sifter 25 and is separated in a cyclon 26, while the remainder is separated in the de-duster 27 and obtained as finished material.
  • the supply of the milling plant with drying gases is illustrated in the drawing. More specifically, on the lefthand side of FIG. 4 the drying gas, for instance, flue gas of a rotary kiln, is introduced into the milling plant through a conduit 28.
  • the intermediate ⁇ branch 4 of conduit 2S passes the drying gas into the drying chamber 2 of the tube mill 20.
  • the upper branch 29 of conduit 28 supplies the hammer mill 22 with drying gas, whereas the lower branch 3d offers the possibility of supplying also the fine grinding chamber 9 additionally with drying heat.
  • the intermediate portion of the tube mill 2t) is surrounded -by a collector housing 7 which on one hand makes possible the discharge of the milled material, and on the other hand permits the withdrawal of the fiue gases.
  • waste gases from the hammer mill 22 and tube mill 2t are combined in a sifter 25 and are withdrawn therefrom through cyclon 26 and de-duster 27 and are discharged into the atmosphere.
  • the employment of the waste gases of the milling plant as sifting medium greatly simplifies the method according to the present invention.
  • shifting means for sifting the broken-up material may be provided below the hammer mill 22 below the hammer mill 22 below the hammer mill 22 .
  • the coarser portion of the material may be charged into the fine grinding chamber 9 of the tube mill 20 through the intervention of a worm 23, whereas the finer portion of the material may by means of any standard conveyor be conveyed to the bucket conveyor 24. In this way this finer portion will first pass through sifter 25. Also in this way the already finished flour, meal, or powder is withdrawn from the fine material portion from the hammer mill 22, and only the grit is again conveyed to the fine grinding chamber 9.
  • the material discharged from the drying chamber 2 of the tube mill 20 may be sifted, and the fine material may be conveyed to the sifter 25 leading to the bucket conveyor 24, whereas the coarse portion is conveyed to the bucket conveyor 21 conveying the material to the hammer mill 22.
  • a partial flow ofthe material broken up by the hammer mill 22 and dried in the drying chamber 2 may be conveyed to the tube mill 22 together with the sticky, moist material. In this way, the moist material is covered with powder and sticking will more likely be avoided.
  • a method of grinding moist material in a tube mill having drying chamber means and separate grinding chamber means which includes the steps of: charging moist material to be ground into said drying chamber means, passing a first flow of gas in the form of a drying gas into and through said drying chamber means while withdrawing the gas having passed through said drying chamber means so as to bypass and grinding chamber means, conveying predried material into said grinding chamber means for grinding therein while independently of said first flow of gas passing a second flow of gas through said grinding chamber means.
  • a method -according to claim 1 which includes the steps of: in addition to charging moist material to be ground into said drying chamber means also charging pre-dried material of the type of said material to be ground into said drying chamber means.
  • a method according to claim 1 which includes the steps of: rough grinding the material dried in said drying chamber means outside said drying chamber means, separating from the thus rough ground material those particles which exceed a desired maximum grain size, and subsequently fine grinding the said separated particles.
  • a method according to claim 4 which includes the steps of conveying a portion of the fine-ground material to the drying chamber.
  • a mill for separately drying and grinding material which includes: a tubular housing having a first section adapted to be connected to a source of drying gas and forming a drying chamber only, said tubular housing also having a second section separated from said drying chamber and forming a grinding chamber for grinding material received by and dried in said drying chamber, said tubular housing furthermore having a third section located between said first and said second section and comprising apertures for communication with said drying chamber and said grinding chamber, first conduit means in flow communication with said third section and bypassing said second section for withdrawing gas passed through said first section and causing said drying gas to bypass said second section, and second conduit means independent of said first conduit means and in fiow communication with said second section for conveying a iiow of gas thereinto.
  • said third section is provided with first apertures communicating with both the interior of said drying chamber means and the interior of said grinding chamber means for discharging material treated in said rst and second sections, said third section also being provided with second apertures communicating with both the interior of said first and second sections for discharging drying gas from said drying chamber means and gaseous substance from said grinding chamber means, first discharge means communicating with and common to said first apertures, and second discharge means communicating with and common to said second apertures.
  • said third section is provided with a first and second group of apertures respectively communicating with the interior of said first and second sections, and in which said first conduit means communicates through apertures of said first group with the interior of said first section for discharging dried material therefrom, and additional conduit means communicating through apertures of said second group with the interior of said second section for discharging ground material therefrom, and further conduit means communicating through apertures of said firstand second group with the interior of said first and second sections for discharging drying gas from said first section and gaseous substance from said second section.
  • a mill for separately drying and grinding material which includes: a tubular housing having a first section forming a drying chamber only for exclusively drying a moist charge received therein, said first section being provided with first inlet means for feeding thereinto a moist charge to be dried and drying gas for drying said moist charge, said tubular housing also having a second section separated from said drying chamber and representing a fine grinding chamber for ne'grinding material dried in said drying chamber, said fine grinding chamber having second inlet means for admitting thereinto a dried charge to be ground and a gaseous substance, said tubular housing having an additional section interposed between said drying chamber and said fine grinding chamber and forming a coarse grinding chamber for coarse-grinding material from said drying chamber, screen means interposed between said drying'chamber and said coarse grinding chamber and for conveying dried material from said drying chamber to said coarse grinding chamber, first discharge means communicating with said screen means for discharging fine material passed through said screen means toward the outside thereof, second discharge means communicating With said coarse grinding chamber for discharging coarse-ground material therefrom

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Drying Of Solid Materials (AREA)
US319934A 1962-12-12 1963-10-28 Method of and apparatus for grinding moist material Expired - Lifetime US3289950A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP30758A DE1219779B (de) 1962-12-12 1962-12-12 Mahltrocknungsverfahren und Anlage zur Durchfuehrung des Verfahrens

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US319934A Expired - Lifetime US3289950A (en) 1962-12-12 1963-10-28 Method of and apparatus for grinding moist material

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US (1) US3289950A (de)
AT (1) AT247114B (de)
CH (1) CH413562A (de)
DE (1) DE1219779B (de)
DK (1) DK112830B (de)
GB (1) GB985126A (de)
SE (1) SE309709B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026477A (en) * 1965-01-15 1977-05-31 A. Tonolli & Co. S.P.A. Process for the separation of components of scrap storage batteries
US4083500A (en) * 1975-11-21 1978-04-11 F. L. Smidth & Co. Tube mill
US4090671A (en) * 1975-12-29 1978-05-23 F. L. Smidth & Co. Tube mill and method for grinding cement clinker
WO1987003220A1 (en) * 1985-11-29 1987-06-04 Larox Oy Procedure and apparatus for producing classified fines product
US4702927A (en) * 1986-02-03 1987-10-27 Fuji Oil Company, Ltd. Method for drying water retentive substance
WO1988001906A1 (en) * 1986-09-10 1988-03-24 Larox Oy Method and equipment for the production of particularly finely divided dry powders
WO1989010790A1 (en) * 1988-05-04 1989-11-16 Christian Pfeiffer Maschinenfabrik Gmbh & Co. Kg Process for size reduction of brittle grinding material
US5251826A (en) * 1992-03-13 1993-10-12 Pennsylvania Crusher Corporation Tumbling media mill and control system
US5340037A (en) * 1992-05-18 1994-08-23 Texaco Inc. Method and apparatus for grinding hot material and recovering gasses emitted therefrom
US6397490B1 (en) * 1999-07-29 2002-06-04 Hosokawa Micron Corporation Flash drying apparatus
EP2397239A1 (de) * 2008-07-21 2011-12-21 Sergei Yur'evich Vil'chek Verfahren zur behandlung von materialien in einer trommelförmigen vorrichtung und vorrichtung zur durchführung des verfahrens
US20110319520A1 (en) * 2007-05-14 2011-12-29 Baker Hughes Incorporated Polyolefin Drag Reducing Agents Produced by Multiple Non-Cryogenic Grinding Stages
US20140061019A1 (en) * 2012-02-22 2014-03-06 John J. Hagerty, JR. Method and Apparatus for Reducing Organic Waste by Rotary Desiccation
CN104069928A (zh) * 2014-07-01 2014-10-01 太原理工大学 小型节能纸砖机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1283656B (de) * 1966-01-25 1968-11-21 Polysius Gmbh Mahltrocknungsverfahren fuer feuchtes Gut
GB2038202B (en) * 1978-12-29 1982-12-01 Smidth & Co As F L Dry grinding a granular material
DE3230824C2 (de) * 1982-08-19 1985-03-14 O & K Orenstein & Koppel Ag, 1000 Berlin Mahltrocknungsanlage mit Vorzerkleinerung
DE3506486A1 (de) * 1985-02-23 1986-08-28 Klöckner-Humboldt-Deutz AG, 5000 Köln Einrichtung zur zerkleinerung und mahlung sproeden mahlgutes wie zum beispiel zementklinker, erz, kohle oder dergleichen
FR2638105A1 (fr) * 1988-10-21 1990-04-27 Fives Cail Babcock Procede de sechage et de broyage de matieres minerales humides et installation pour la mise en oeuvre de ce procede
DE4312941C1 (de) * 1993-04-21 1994-05-11 Noell Serv & Maschtechn Gmbh Anlage zur Trocknung nasser Schüttgüter
CN108816431B (zh) * 2018-06-15 2021-06-29 许昌市建设工程质量检测站 一种市政道路检测用样品研磨装置

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GB369330A (en) * 1930-10-15 1932-03-24 Aeg Plant for the treatment of moist fuels
US2347215A (en) * 1940-06-14 1944-04-25 Nat Distillers Prod Corp Degermination of corn
US2350162A (en) * 1941-04-24 1944-05-30 Comb Eng Co Inc Material drying method
US2351870A (en) * 1940-12-26 1944-06-20 Allis Chalmers Mfg Co Combined ball mill and drier
US2609299A (en) * 1949-09-27 1952-09-02 Allied Mills Inc Treatment of soya beans
US3117868A (en) * 1961-09-28 1964-01-14 Process Millers Inc Process for nixtamalizing whole grain having an inherent moisture content

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE577537C (de) * 1931-08-30 1933-06-06 Polysius A G G Rohr- oder Verbundmuehle
DE680969C (de) * 1938-07-17 1939-09-11 Polysius Akt Ges G Verbundrohrmuehle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB369330A (en) * 1930-10-15 1932-03-24 Aeg Plant for the treatment of moist fuels
US2347215A (en) * 1940-06-14 1944-04-25 Nat Distillers Prod Corp Degermination of corn
US2351870A (en) * 1940-12-26 1944-06-20 Allis Chalmers Mfg Co Combined ball mill and drier
US2350162A (en) * 1941-04-24 1944-05-30 Comb Eng Co Inc Material drying method
US2609299A (en) * 1949-09-27 1952-09-02 Allied Mills Inc Treatment of soya beans
US3117868A (en) * 1961-09-28 1964-01-14 Process Millers Inc Process for nixtamalizing whole grain having an inherent moisture content

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026477A (en) * 1965-01-15 1977-05-31 A. Tonolli & Co. S.P.A. Process for the separation of components of scrap storage batteries
US4083500A (en) * 1975-11-21 1978-04-11 F. L. Smidth & Co. Tube mill
US4090671A (en) * 1975-12-29 1978-05-23 F. L. Smidth & Co. Tube mill and method for grinding cement clinker
WO1987003220A1 (en) * 1985-11-29 1987-06-04 Larox Oy Procedure and apparatus for producing classified fines product
US4702927A (en) * 1986-02-03 1987-10-27 Fuji Oil Company, Ltd. Method for drying water retentive substance
WO1988001906A1 (en) * 1986-09-10 1988-03-24 Larox Oy Method and equipment for the production of particularly finely divided dry powders
WO1989010790A1 (en) * 1988-05-04 1989-11-16 Christian Pfeiffer Maschinenfabrik Gmbh & Co. Kg Process for size reduction of brittle grinding material
US5251826A (en) * 1992-03-13 1993-10-12 Pennsylvania Crusher Corporation Tumbling media mill and control system
US5340037A (en) * 1992-05-18 1994-08-23 Texaco Inc. Method and apparatus for grinding hot material and recovering gasses emitted therefrom
US5566891A (en) * 1992-05-18 1996-10-22 Texaco Development Corporation Method for grinding hot material and recovering gasses emitted therefrom
US6397490B1 (en) * 1999-07-29 2002-06-04 Hosokawa Micron Corporation Flash drying apparatus
US20110319520A1 (en) * 2007-05-14 2011-12-29 Baker Hughes Incorporated Polyolefin Drag Reducing Agents Produced by Multiple Non-Cryogenic Grinding Stages
EP2397239A1 (de) * 2008-07-21 2011-12-21 Sergei Yur'evich Vil'chek Verfahren zur behandlung von materialien in einer trommelförmigen vorrichtung und vorrichtung zur durchführung des verfahrens
CN102307681A (zh) * 2008-07-21 2012-01-04 S·Y·维尔奇科 用于在滚筒装置中处理材料的方法及实施该方法的装置
JP2012517336A (ja) * 2008-07-21 2012-08-02 ユレビッチ ビルチェク，セルゲイ ドラム装置で物質を処理するための方法とその方法を実現するための装置
EP2397239A4 (de) * 2008-07-21 2012-10-24 Chek Sergei Yur Evich Vil Verfahren zur behandlung von materialien in einer trommelförmigen vorrichtung und vorrichtung zur durchführung des verfahrens
US20140061019A1 (en) * 2012-02-22 2014-03-06 John J. Hagerty, JR. Method and Apparatus for Reducing Organic Waste by Rotary Desiccation
CN104069928A (zh) * 2014-07-01 2014-10-01 太原理工大学 小型节能纸砖机
CN104069928B (zh) * 2014-07-01 2016-06-08 太原理工大学 小型节能纸砖机

Also Published As

Publication number Publication date
DK112830B (da) 1969-01-20
AT247114B (de) 1966-05-25
DE1219779B (de) 1966-06-23
GB985126A (en) 1965-03-03
CH413562A (de) 1966-05-15
SE309709B (de) 1969-03-31

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