US3131875A - Method of and apparatus for grinding a solid in a liquid - Google Patents
Method of and apparatus for grinding a solid in a liquid Download PDFInfo
- Publication number
- US3131875A US3131875A US132057A US13205761A US3131875A US 3131875 A US3131875 A US 3131875A US 132057 A US132057 A US 132057A US 13205761 A US13205761 A US 13205761A US 3131875 A US3131875 A US 3131875A
- Authority
- US
- United States
- Prior art keywords
- grinding
- elements
- agitating
- liquid
- edge
- 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
Links
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Classifications
-
- 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
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23G—COCOA; COCOA PRODUCTS, e.g. CHOCOLATE; SUBSTITUTES FOR COCOA OR COCOA PRODUCTS; CONFECTIONERY; CHEWING GUM; ICE-CREAM; PREPARATION THEREOF
- A23G3/00—Sweetmeats; Confectionery; Marzipan; Coated or filled products
- A23G3/02—Apparatus specially adapted for manufacture or treatment of sweetmeats or confectionery; Accessories therefor
- A23G3/0205—Manufacture or treatment of liquids, pastes, creams, granules, shred or powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
Definitions
- FIG. 2 I METHOD OF AND APPARATUS FOR GRINDING A SOLID IN A LIQUID Filed Aug. 17, 1961 INVENTUR. ANDREW SZEGVARI Bi /Mm ATTORNEY FIG. 2
- the grinding elements are substantially spherical, and all are of substantially the same size. They may be composed of metal, stone, or the like. They are put into motion and then kept in substantially constant motion out of static contact with one another by moving one or more agitator blades horizontally through a mass of them in a vessel.
- the improvement of this invention is in the shape of the agitator blade or blades and the improved grinding action which results from their use.
- the blade is streamlined with a thin forward edge which tapers to a blunt rear edge, its cross section being substantially that of the vertical cross section of a tear drop. It is moved through the grinding elements in the direction opposite to that in which an airfoil moves through the air because the airfoil is shaped to cause minimum agitation of the air, particularly at its rear edge, and it is the function of the agitator blade to cause maximum agitation of the grinding elements, with minimum consumption of energy.
- FIG. 1 is an elevation of an empty grinding vessel equipped with an agitator provided with blades of the invention
- FIG. 2 is an enlarged detail of a corner of the vessel, the grinding elements being much closer together than illustrated, in actual practice;
- FIG. 3 is a section through a blade on the line 33 of FIG. 2, with a schematic showing of how the grinding elements are agitated.
- the vessel 5, of S-gallon capacity contains a large number of steel balls 6, each measuring inch in diameter.
- the grinding elements may vary in size from fine sandsized particles, e.g. inch in diameter to elements ii; inch in diameter or larger, depending upon the size of the vessel, the nature of the material to be ground, etc.
- the vessel is filled with these elements to a depth to cover the top blade of the agitator.
- the agitator comprises a number of evenly spaced agitator blades 8 which project from the vertical shaft 9 which is adapted to be rotated at a speed of 50 to 300 revolutions per minute, depending upon the material subjected to treatment, the ultimate particle size desired, etc.
- the outer ends of the blades are spaced about inch (three times an element diameter) from the wall of the vessel to prevent jamming of the elements in that space.
- the agitator may be used for dry grinding, or the grinding of a suspension from which the grinding elements quickly settle. It may be used for grinding extremely hard materials, and the rapid grinding of softer materials, and the processing of sensitive materials such as biological preparations, medicinals, and other edible products in which more than a trace of impurities derived from the wall structure of the grinding vessel is objectionable. Thus, it may be used for grinding tungsten carbide, paint pigments, coal, procain penicillin and many, many other materials. Where suitable they may be ground dry, although usually they will be ground in suspension in water or other thinly fluid liquid. The hardness, etc. required in the grinding elements will depend upon the material subjected to treatment. Vessels of several hundred gallons capacity can be used. Several agitators of the type shown, all rotated in the same direction, may be used in a single vessel.
- the agitator arm In grinding, the agitator arm is moved with the thin edge forward at a suflicient speed to keep the elements (except those adjacent the bottom and the wall of the vessel) out of static contact with one another. They are suspended in the liquid, and are directed toward each other due to the negative hydrostatic pressure caused by different sides of the same airfoil-shape agitator means. They are in substantially constant motion throughout the grinding operation, bouncing against one another and grinding the material in their respective paths. The action of the elements is more particularly described in said U.S. 2,764,359.
- the vessel may be tipped to empty its contents, or it may be provided with suitable valve means 10, which may be of the type described in said U.S. 2,764,- 359 which retains the grinding elements in the vessel while permitting the discharge of a liquid suspension or" the ground product.
- apparatus for grinding a solid in a liquid which includes in a vessel, many substantially spherical grinding elements all of substantially the same size, and at least one substantially horizontal elongated element adapted to be rotated about an axis at sufiicient speed for maintaining the grinding element out of static contact with one another, the improvement in which said elongated element is streamlined and has a cross section substantially that of the vertical cross section of a tear drop, with means for moving the elongated element with the thin edge thereof the leading edge, whereby agitation of grinding elements is accelerated immediately to the rear of the elongated element as it is moved through the grinding elements.
- the improvement which comprises moving through the elements streamlined agitating means which has a cross section substantially that of the vertical cross section of a tear drop, with its thin edge forward and by the subsequent passage of the blunt edge through the agitating elements directing them toward one another at the rear of the agitating means as it is moved through the liquid due to the negative hydrostatic pressure caused by the passage of the different sides of the same agitating means through the liquid, and moving the agitating means at a sufficient speed to maintain the grinding elements out of static contact with one another.
- a grinding or mixing process performed by contacting balls or grinding elements which are part of a liquid system, whereby these elements are moved into contact primarily by producing hydrodynamic flow behind a moving streamlined agitator arm which broadens gradually backwardly from a pointed front edge and has a blunt 7 rear, thereby keeping the elements in substantially constreamlined agitator arm which has a thin forward edge and tapers backwardly to a blunt rear edge, through grinding elements out of static contact with one another in a medium that behaves like a liquid whereby the elements are moved into contact behind the agitator arm primarily because of hydrodynamic flow existing behind the agitator arm and produced by the movement of the agitator arm and thereby kept in substantially constant motion out of static contact with one another.
- apparatus for grinding a solid in a liquid which includes a vessel, a liquid in the vessel, many substantially spherical grinding elements all of substantially the same size suspended in the liquid out of static contact with one another, and at least one substantially horizontal elongated element adapted to be rotated about a'ver tical axis for maintaining the grinding elements suspended in the liquid, the improvement in which said elongated element has a cross section substantially that of a tear drop with the thin edge thereof the leading edge and free of all sharp edges to the rear of said leading edge, whereby agitation of the grinding elements is accelerated immediately to the rear of the elongated element primarily by hydrodynamic fiow as the elongated element is moved 10 through the grinding elements.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Crushing And Grinding (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3689860 | 1960-09-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3131875A true US3131875A (en) | 1964-05-05 |
Family
ID=12482578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US132057A Expired - Lifetime US3131875A (en) | 1960-09-05 | 1961-08-17 | Method of and apparatus for grinding a solid in a liquid |
Country Status (6)
Country | Link |
---|---|
US (1) | US3131875A (de) |
CH (1) | CH393884A (de) |
DE (1) | DE1164215B (de) |
FR (1) | FR1302681A (de) |
GB (1) | GB1000459A (de) |
NL (1) | NL110346C (de) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3367584A (en) * | 1965-06-09 | 1968-02-06 | Owatonna Mfg Company Inc | Hammer for hammer mills |
US3944144A (en) * | 1973-06-13 | 1976-03-16 | Dai Nippon Toryo Co., Ltd. | Method and apparatus for dispersing suspensions |
US4844355A (en) * | 1987-11-05 | 1989-07-04 | Gte Products Corporation | Apparatus for milling metal powder to produce high bulk density fine metal powders |
CN101402062B (zh) * | 2008-11-14 | 2010-11-10 | 昆明理工大学 | 立式同轴离心磨机 |
WO2013167851A1 (en) | 2012-05-10 | 2013-11-14 | Belmonte Investments Limited | Attritor mill and process for using it |
GB202110426D0 (en) | 2021-07-20 | 2021-09-01 | Cellucomp Ltd | Biodegradable and reusable cellulosic microporous superabsorbent materials |
GB202110423D0 (en) | 2021-07-20 | 2021-09-01 | Cellucomp Ltd | Cellulosic microporous superabsorbent materials with tunable morphology |
WO2023001911A1 (en) | 2021-07-20 | 2023-01-26 | Cellucomp Limited | Biodegradable and reusable cellulosic microporous superabsorbent materials |
WO2023001909A1 (en) | 2021-07-20 | 2023-01-26 | Cellucomp Limited | Water absorbing and antimicrobial fabric composition |
WO2023078904A1 (en) | 2021-11-02 | 2023-05-11 | Cellucomp Limited | Citric acid-catalysed curran modified card board materials |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1248442B (de) * | 1964-02-27 | 1967-08-24 | Draiswerke Gmbh | Ruehrwerksmuehle fuer die Herstellung von Feststoffdispersionen in Fluessigkeiten |
DE1288890B (de) * | 1964-04-10 | 1969-02-06 | Draiswerke Gmbh | Verfahren und Vorrichtung zum trockenen Feinstzerkleinern von Feststoffen |
DE1247822B (de) * | 1965-06-24 | 1967-08-17 | Robert Wakefield Norris Jr | Ruehrwerksmuehle |
GB9214387D0 (en) * | 1992-07-07 | 1992-08-19 | Forrest Joseph M | Bead mill |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA450670A (en) * | 1948-08-24 | Illitch Klock Peter | Method and apparatus for treating particles of materials | |
US2764359A (en) * | 1950-05-24 | 1956-09-25 | Szegvari Andrew | Treatment of liquid systems and apparatus therefor |
US2779752A (en) * | 1953-11-18 | 1957-01-29 | Du Pont | Apparatus for chemical reactions passing through viscous phase |
-
0
- NL NL110346D patent/NL110346C/xx active
-
1961
- 1961-08-17 US US132057A patent/US3131875A/en not_active Expired - Lifetime
- 1961-08-26 DE DES75474A patent/DE1164215B/de active Pending
- 1961-08-31 CH CH1012661A patent/CH393884A/de unknown
- 1961-09-04 GB GB31770/61A patent/GB1000459A/en not_active Expired
- 1961-09-04 FR FR872252A patent/FR1302681A/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA450670A (en) * | 1948-08-24 | Illitch Klock Peter | Method and apparatus for treating particles of materials | |
US2764359A (en) * | 1950-05-24 | 1956-09-25 | Szegvari Andrew | Treatment of liquid systems and apparatus therefor |
US2779752A (en) * | 1953-11-18 | 1957-01-29 | Du Pont | Apparatus for chemical reactions passing through viscous phase |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3367584A (en) * | 1965-06-09 | 1968-02-06 | Owatonna Mfg Company Inc | Hammer for hammer mills |
US3944144A (en) * | 1973-06-13 | 1976-03-16 | Dai Nippon Toryo Co., Ltd. | Method and apparatus for dispersing suspensions |
US4844355A (en) * | 1987-11-05 | 1989-07-04 | Gte Products Corporation | Apparatus for milling metal powder to produce high bulk density fine metal powders |
CN101402062B (zh) * | 2008-11-14 | 2010-11-10 | 昆明理工大学 | 立式同轴离心磨机 |
WO2013167851A1 (en) | 2012-05-10 | 2013-11-14 | Belmonte Investments Limited | Attritor mill and process for using it |
GB202110426D0 (en) | 2021-07-20 | 2021-09-01 | Cellucomp Ltd | Biodegradable and reusable cellulosic microporous superabsorbent materials |
GB202110423D0 (en) | 2021-07-20 | 2021-09-01 | Cellucomp Ltd | Cellulosic microporous superabsorbent materials with tunable morphology |
GB2609040A (en) | 2021-07-20 | 2023-01-25 | Cellucomp Ltd | Biodegradable and reusable cellulosic microporous superabsorbent materials |
GB2609039A (en) | 2021-07-20 | 2023-01-25 | Cellucomp Ltd | Cellulosic microporous superabsorbent materials with tunable morphology |
WO2023001911A1 (en) | 2021-07-20 | 2023-01-26 | Cellucomp Limited | Biodegradable and reusable cellulosic microporous superabsorbent materials |
WO2023001909A1 (en) | 2021-07-20 | 2023-01-26 | Cellucomp Limited | Water absorbing and antimicrobial fabric composition |
WO2023078904A1 (en) | 2021-11-02 | 2023-05-11 | Cellucomp Limited | Citric acid-catalysed curran modified card board materials |
Also Published As
Publication number | Publication date |
---|---|
FR1302681A (fr) | 1962-08-31 |
GB1000459A (en) | 1965-08-04 |
NL110346C (de) | |
DE1164215B (de) | 1964-02-27 |
CH393884A (de) | 1965-06-15 |
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