US3904130A - Mill for grinding minerals - Google Patents

Mill for grinding minerals Download PDF

Info

Publication number
US3904130A
US3904130A US401487A US40148773A US3904130A US 3904130 A US3904130 A US 3904130A US 401487 A US401487 A US 401487A US 40148773 A US40148773 A US 40148773A US 3904130 A US3904130 A US 3904130A
Authority
US
United States
Prior art keywords
grinding
mill
weight
balls
diameter
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
US401487A
Other languages
English (en)
Inventor
Pierre Delfosse
Alfred Bosshard
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.)
Omya AG
Original Assignee
Pluess Staufer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pluess Staufer AG filed Critical Pluess Staufer AG
Application granted granted Critical
Publication of US3904130A publication Critical patent/US3904130A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C09C3/041—Grinding
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/02—Compounds of alkaline earth metals or magnesium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/51—Particles with a specific particle size distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds

Definitions

  • the present invention relates to a mill for grinding minerals which are used as pigments or fillers.
  • the sand mills' which are most widely used consist of a cylindrical mill body with a vertical axis and a rotor with discs or crowns, the rotor simultaneously moving the grinding elements and the liquid suspension of the material to be ground in the cylinder.
  • the liquid suspension of the material to be ground enters the mill at the bottom and is discharged at the top by means of an overflow.
  • the known grinding elements consist of sand, glass balls, stearite balls, molocite balls, steel balls or nylon balls.
  • the known grinding elements have the disadvantage of contaminating the materials to be ground, due to rapid wear.
  • Another disadvantage of the known grinding elements consists in that they can only be used for suspensions of comparatively low viscosity because of their low specific weight. In other words: with a given type of mill and, for example, glass balls, the concentration of the solids is limited by the viscosity which cannot be exceeded.
  • the grinding elements consist of 30 70% by weight of zirconium oxide, 0.1 5% by weight of aluminium oxide and 5 20% by weight of silicon oxide.
  • Ball mills the balls of which have a diameter of 0.5 cm
  • bead mills the balls of which have a diameter of 0.05 0.5 cm, preferably 0.1 0.25 cm, or sand mills are preferably used.
  • the grinding elements used according to the invention have a smooth surface. Apart from their great hardness and their resistance to abrasion, one of the most important properties of the grinding elements of the invention is their specific weight amounting to 3.5 5, dependent upon the content of zirconium oxide.
  • a mill was charged with 920 kg of grinding elements in the form of balls according to the invention with a diameter of between 1 and 2.5 cm.
  • the material to be ground consisted of an aqueous suspension of chalk with a concentration of 64% solids.
  • the throughput amounted to 1,000 litres/h.
  • a product with 95 98% of particles below 2 microns and a degree of whiteness of 95% Elrepho (blue filter) was obtained.
  • the specific surface of the finished product was found to have increased by 20 25%. It was also found that, in contrast to the use of glass balls, the mill performed with satisfactory regularity and that the ampere value remained constant and no vibration occurred.
  • the increase in the degree of whiteness achieved by using the mill according to the invention can be explained not only by the increase in fineness but also by a substantially lower contamination of the finished product.
  • the wear of the balls used was substantially lower than that of glass balls, as is shown by the following comparison.
  • Balls used according to the invention 0.3 kg/t finished product; glass balls: 1 1.3 kg/t finished product.
  • Another advantage of the present invention consists in the fact that the grinding elements based on zirconium, in contrast to balls of glass or other substances, do not contain metals such as lead, manganese, copper etc. which could lead to contamination of the finished product.
  • a further advantage of the mill according to the invention consists in the possibility of grinding aqueous suspensions of substantially higher viscosities and hence substantially higher solids concentration than with the use of grinding elements of different composition, and this results in a higher throughput while the fineness obtained remains the same.
  • the concentration of solid particles in the material to be ground can be increased to in the process of the invention, whereas in the case of, for example, glass balls, the optimal concentration is about 64%, the fineness achieved being the same in both cases.
  • a further advantage of the mill of the invention consists in that substances of a comparatively high specific weight can be ground such as e.g. barite or various lead salts.
  • a mill for grinding minerals for use as a pigment or filler having grinding elements comprising 30 to 70% by weight of zirconium oxide, 0.] to 5% by weight of aluminium oxide and 5 to 20% by weight of silicon oxide.
  • a process for grinding of a material which comrises grinding said material in a mill having grinding lements comprising 30 to 70% by weight of zirconium xide, 0.1 to 5% by weight of aluminum oxide and 5 to 0% by weight of silicon oxide.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Crushing And Grinding (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
US401487A 1972-10-18 1973-09-27 Mill for grinding minerals Expired - Lifetime US3904130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2251099A DE2251099C3 (de) 1972-10-18 1972-10-18 Mahlkörper für Mühlen zur Vermahlung von Mineralien

Publications (1)

Publication Number Publication Date
US3904130A true US3904130A (en) 1975-09-09

Family

ID=5859403

Family Applications (1)

Application Number Title Priority Date Filing Date
US401487A Expired - Lifetime US3904130A (en) 1972-10-18 1973-09-27 Mill for grinding minerals

Country Status (4)

Country Link
US (1) US3904130A (ko)
DE (1) DE2251099C3 (ko)
FR (1) FR2203681B1 (ko)
GB (1) GB1387100A (ko)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547534A (en) * 1983-03-18 1985-10-15 Memorex Corporation Method to disperse fine solids without size reduction
US4670370A (en) * 1986-04-03 1987-06-02 E. I. Du Pont De Nemours And Company Process for preparation of color liquid toner for electrostatic imaging using carbon steel particulate media
US20040118954A1 (en) * 2001-06-25 2004-06-24 Philippe Artru Method and device for fine grinding of minerals particles
US20090301351A1 (en) * 2005-07-25 2009-12-10 Omya Development Ag Process to disperse and/or grind and/or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US20100074827A1 (en) * 2005-09-16 2010-03-25 Christian Rainer Process of Preparing Mineral Material with Particular Ceria-Containing Zirconium Oxide Grinding Beads, Obtained Products and their Uses
US20100075148A1 (en) * 2005-09-16 2010-03-25 Christian Rainer Process of Manufacturing a Co-Ground Calcium Carbonate Mineral of the Gcc and Pcc Type with a Specific Steepness Factor, Obtained Products and their Uses
US20110139913A1 (en) * 2009-12-11 2011-06-16 Flsmidth A/S Milling device
US20120282470A1 (en) * 2004-09-21 2012-11-08 Al-Shafei Mansour A Ground particulate spent claus catalyst product
US8647597B1 (en) 2005-09-16 2014-02-11 Omya International Ag Process of preparing mineral material with particular ceria-containing zirconium oxide grinding beads, obtained products and their uses

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2334804B1 (de) 1973-07-09 1975-01-02 Pluss Stauffer Ag Verfahren zur Nassvermahlung von Mineralien
FI64674C (fi) * 1982-04-29 1983-12-12 Ruskealan Marmori Oy Foerfarande foer framstaellning av en fyllnadsmedels- och/eller belaeggningspigmentblandning foer papper
JPS6287414A (ja) * 1985-10-14 1987-04-21 Oji Paper Co Ltd 抄紙用重質炭酸カルシウムの処理方法
GB2257379B (en) * 1991-07-09 1995-04-19 Ecc Int Ltd Comminution in a planetary mill
ATE158202T1 (de) * 1992-07-07 1997-10-15 Ecc Int Ltd Differentialzerkleinerung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316043A (en) * 1939-01-30 1943-04-06 Cabot Godfrey L Inc Treatment of pigments or the like
US2332701A (en) * 1940-06-12 1943-10-26 Charles W Dowsett System and method of grinding

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1671080A1 (de) * 1965-05-25 1971-08-12 Schmitz Ralf Guenther Mahlkoerper und Auskleidungen fuer Kugelmuehlen u.dgl. zum eisen- bzw. metallfreien Vermahlen von Rohstoffen und Verfahren zu deren Herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2316043A (en) * 1939-01-30 1943-04-06 Cabot Godfrey L Inc Treatment of pigments or the like
US2332701A (en) * 1940-06-12 1943-10-26 Charles W Dowsett System and method of grinding

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547534A (en) * 1983-03-18 1985-10-15 Memorex Corporation Method to disperse fine solids without size reduction
US4670370A (en) * 1986-04-03 1987-06-02 E. I. Du Pont De Nemours And Company Process for preparation of color liquid toner for electrostatic imaging using carbon steel particulate media
US20040118954A1 (en) * 2001-06-25 2004-06-24 Philippe Artru Method and device for fine grinding of minerals particles
US7093782B2 (en) * 2001-06-25 2006-08-22 Wheelabrator-Allevard Method and device for fine grinding of mineral particles
US10301216B2 (en) * 2004-09-21 2019-05-28 Saudi Arabian Oil Company Ground particulate spent Claus catalyst product
US20120282470A1 (en) * 2004-09-21 2012-11-08 Al-Shafei Mansour A Ground particulate spent claus catalyst product
US20110192323A1 (en) * 2005-07-25 2011-08-11 Mathias Buri Process to disperse and / or grind and / or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US8845804B2 (en) 2005-07-25 2014-09-30 Omya International Ag Process to disperse and/or grind and/or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US9574088B2 (en) 2005-07-25 2017-02-21 Omya International Ag Process to disperse and / or grind and / or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US9617430B2 (en) 2005-07-25 2017-04-11 Omya International Ag Process to disperse and/or grind and/or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
EP3235879A1 (en) * 2005-07-25 2017-10-25 Omya International AG Process to disperse and / or grind and / or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US20090301351A1 (en) * 2005-07-25 2009-12-10 Omya Development Ag Process to disperse and/or grind and/or concentrate calcium carbonate in aqueous media using an aqueous solution containing zirconium compounds
US20100075148A1 (en) * 2005-09-16 2010-03-25 Christian Rainer Process of Manufacturing a Co-Ground Calcium Carbonate Mineral of the Gcc and Pcc Type with a Specific Steepness Factor, Obtained Products and their Uses
US20100074827A1 (en) * 2005-09-16 2010-03-25 Christian Rainer Process of Preparing Mineral Material with Particular Ceria-Containing Zirconium Oxide Grinding Beads, Obtained Products and their Uses
US8517291B2 (en) 2005-09-16 2013-08-27 Omya International Ag Process of manufacturing a co-ground calcium carbonate mineral of the GCC and PCC type with a specific steepness factor, obtained products and their uses
US8591853B2 (en) 2005-09-16 2013-11-26 Omya International Ag Process of preparing mineral material with particular ceria-containing zirconium oxide grinding beads, obtained products and their uses
US8647597B1 (en) 2005-09-16 2014-02-11 Omya International Ag Process of preparing mineral material with particular ceria-containing zirconium oxide grinding beads, obtained products and their uses
US20110139913A1 (en) * 2009-12-11 2011-06-16 Flsmidth A/S Milling device
US8091817B2 (en) 2009-12-11 2012-01-10 Flsmidth A/S Milling device

Also Published As

Publication number Publication date
DE2251099B2 (de) 1978-06-29
FR2203681B1 (ko) 1976-06-18
GB1387100A (en) 1975-03-12
DE2251099A1 (de) 1974-05-02
DE2251099C3 (de) 1979-02-22
FR2203681A1 (ko) 1974-05-17

Similar Documents

Publication Publication Date Title
US3904130A (en) Mill for grinding minerals
US3014836A (en) Calcined clay products
US3149789A (en) Continuous process of grinding particulate material
US3798044A (en) Process for manufacturing calcined kaolinitic clay products
CA1061957A (en) Brightening of natural calcitic ores
FI64674C (fi) Foerfarande foer framstaellning av en fyllnadsmedels- och/eller belaeggningspigmentblandning foer papper
US4561597A (en) Method for improving handleability of calcined kaolin clay products
US4693427A (en) Method for improving handleability of calcined kaolin clay products
US3476576A (en) Process for obtaining a size reduction of non-lamellar materials
US3934825A (en) Process for the wet grinding of materials
US3798047A (en) Pigment for coating paper and manufacture thereof
US3022185A (en) White filler material and its preparation
US4593860A (en) Method for improving handleability of calcined kaolin clay products
FI65552C (fi) Framstaellningsfoerfarande foer mineralfyllaemnen genom vaotfinfoerdelning
US3398008A (en) Grinding method
US2260826A (en) Process for preparing improved pigment materials
US4013602A (en) Ultrafine natural calcium carbonates as fillers in varnishes and paints
US3990642A (en) Brightening of natural dolomitic ores
US20050017105A1 (en) Superfine powders and methods for manufacture of said powders
EP0577889B1 (en) Differential grinding
GB1428432A (en) Ceramic metal materials
GB2261431A (en) Preparing pigment suspensions by wet grinding
EP0690749B1 (en) Method of milling with a zirconium silicate grinding medium
US3313492A (en) Grinding method
US2346085A (en) Process for producing improved titanium pigments