EP3542904A1 - Mühle für keramische materialien - Google Patents

Mühle für keramische materialien Download PDF

Info

Publication number: EP3542904A1
Authority: EP; European Patent Office
Prior art keywords: loading; unloading; grille; opening; rotation
Prior art date: 2018-03-22
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.): Granted

Application number

EP19161067.4A

Other languages

English (en)

French (fr)

Other versions

EP3542904B1 (de

Inventor

Valter PALLADINI

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.)

Certech SpA A Socio Unico

Original Assignee

Certech SpA A Socio Unico

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.)

2018-03-22

Filing date

2019-03-06

Publication date

2019-09-25

2019-03-06 Application filed by Certech SpA A Socio Unico filed Critical Certech SpA A Socio Unico

2019-03-06 Priority to SM20210389T priority Critical patent/SMT202100389T1/it

2019-09-25 Publication of EP3542904A1 publication Critical patent/EP3542904A1/de

2021-04-07 Application granted granted Critical

2021-04-07 Publication of EP3542904B1 publication Critical patent/EP3542904B1/de

Status Active legal-status Critical Current

2039-03-06 Anticipated expiration legal-status Critical

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
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- 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
- B24B31/02—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 rotary barrels
- B24B31/03—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 rotary barrels the workpieces being continuously-travelling
- 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
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00

Definitions

the present invention relates to a mill for grinding at least one material used in the ceramics industry, e.g. clay ceramics.
the invention relates in particular to a mill comprising a rotating hollow body, which defines a volume in which grinding bodies are arranged immersed in a liquid, typically water.
the grinding bodies have the function of grinding the material introduced into the volume itself, following the rotation of the mill about an axis of rotation and during such rotation.
the best performing mills perform their grinding action in a continuous cycle.
the introduction of the material to be ground and the extraction of the ground material are carried out concentrically to the axis of rotation of the mill, so that the hollow body can be kept in continuous rotation.
the grinding bodies are cyclically dragged upwards by the rotation of the hollow body and fall down once it reaches a position of maximum height. During these movements, the grinding bodies can accidentally enter the loading opening or unloading opening of the mill, causing occlusions or, in any case, exiting from the mill.
the mills are filled up to a level lower than that of the loading and unloading openings of the mill. This involves a considerable imbalance of the total mass of the mill with respect to the axis of rotation of the hollow body, and a consequent increase in the energy consumption required to keep the mill in rotation. On the other hand, it is not currently possible to raise the filling level of the mill, as in doing so the number of hollow bodies which tend to escape from the mill through the loading and unloading openings greatly increases.
the object of the present invention is to overcome the drawbacks of the currently available mills, preventing the grinding bodies from escaping from the mill.
the mill according to the present invention comprises a hollow body (2), rotating around an axis of rotation (X).
the hollow body (2) has a cylindrical shape, concentric with the axis of rotation (X), and is equipped with a loading head (21) and an unloading head (22) which close the hollow body (2) at its ends.
the two heads (21,22) are arranged substantially transverse to the axis of rotation (X).
Motor means are arranged to drive the hollow body (2) in rotation through a transmission.
the motor means and the transmission required for driving the rotation of the hollow body (2) are well known in the industry, and will therefore not be described in further detail.
the hollow body is equipped with a loading opening (2a), concentric to the axis of rotation (X), and an unloading opening (2b), concentric to the axis of rotation (X).
the loading opening (2a) is formed through the loading head.
Supply means not shown, can be connected to the loading opening (2a) for supplying the material to be subjected to grinding inside the hollow body (2).
the unloading opening (2b) is formed through the unloading head (22), to allow the outflow of the ground material.
the unloading opening (2b) can be connected to a duct which carries the ground material to a subsequent destination.
the material to be ground is fed to the hollow body (2) in an aqueous suspension.
a plurality of grinding bodies are also arranged inside the hollow body (2) which, cyclically rising and falling inside the hollow body (2) due to the rotation of the latter, carry out the grinding of the material.
the mill according to the present invention comprises a loading grille (3), arranged inside the hollow body (2) and located in front of the loading opening (2a), having a plurality of through openings (31).
the mill further comprises an unloading grille (4), arranged inside the hollow body (3) and located in front of the unloading opening (2b), having a plurality of through openings (41).
the two grilles (3,4) equipped with through openings (31,41), allow the flow of the aqueous suspension, while they do not allow the passage of the grinding bodies, which cannot therefore enter into the loading and unloading openings (2a, 2b).
the filling level of the hollow body (2) namely the level of the aqueous suspension containing the material to be ground, can be raised to above the axis of rotation (X), i.e. to above the level of the loading and unloading openings (2a, 2b), allowing a substantial reduction of the energy required for the rotation of the hollow body (2).
the loading grille (3) is associated with the loading head (21), in a frontal position with respect to the loading opening (2a).
the loading grille (3) is substantially concentric to the loading opening (2a).
the loading grille (3) has a concave conformation.
the concavity of the loading grille (3) is turned towards the loading opening (2a), so that a central area of the loading grille (3) is maintained at a certain distance from the loading head (21), to favour the inflow of material through the loading opening (2a).
the loading grille (3) has a truncoconical conformation, concentric to the loading opening (2a).
a base flange of the loading grille (3) is associated with the loading head (21), while the apex portion is placed in front of the loading opening (2a). This conformation is particularly effective to allow the inflow of material and, simultaneously, to keep the grinding bodies at a distance from the loading opening (2a).
the unloading grille (4) is associated with the unloading head (22), in a frontal position with respect to the unloading opening (2b).
the unloading grille (4) is substantially concentric to the unloading opening (2b).
the unloading grille (4) has a concave conformation.
the concavity of the unloading grille (4) is turned towards the unloading opening (2b), so that a central area of the unloading grille (4) is maintained at a certain distance from the unloading head (22), to favour the outflow of material through the unloading opening (2b).
the unloading grille (4) has a truncoconical conformation, concentric to the unloading opening (2b).
a base flange of the unloading grille (4) is associated with the unloading head (22), while the apex portion is placed in front of the unloading opening (2b). This conformation is particularly effective to allow the outflow of material and, simultaneously, to keep the grinding bodies at a distance from the unloading opening (2b).
the mill according to the present invention provides important advantages.
the presence of the loading grille (3) which prevents the entry of the grinding bodies in the loading opening (2a), makes it possible to raise the level of filling of the mill well above the axis of rotation (X).
This raise in level reduces the eccentricity of the total mass of the mill, i.e. brings the centre of the hollow body and the mass contained therein (2) closer to the axis of rotation (X), so that the energy needed for the rotation of the hollow body (2) is drastically reduced compared to the currently available mills.
the raising of the filling level in the hollow body (2) also makes it possible to reduce the processing time.
the use of the unloading grille (4) makes it possible to increase the advantages of the invention, insofar as it excludes the possibility that the grinding bodies can enter into the unloading opening (2b).

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Food Science & Technology (AREA)
Crushing And Grinding (AREA)
Compositions Of Oxide Ceramics (AREA)
Saccharide Compounds (AREA)
Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

EP19161067.4A 2018-03-22 2019-03-06 Mühle für keramische materialien Active EP3542904B1 (de)

Priority Applications (1)

Application Number	Priority Date	Filing Date	Title
SM20210389T SMT202100389T1 (it)	2018-03-22	2019-03-06	Mulino per materiali ceramici

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT102018000003874A IT201800003874A1 (it)	2018-03-22	2018-03-22	Mulino per materiali ceramici

Publications (2)

Publication Number	Publication Date
EP3542904A1 true EP3542904A1 (de)	2019-09-25
EP3542904B1 EP3542904B1 (de)	2021-04-07

Family

ID=62597904

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19161067.4A Active EP3542904B1 (de)	2018-03-22	2019-03-06	Mühle für keramische materialien

Country Status (6)

Country	Link
EP (1)	EP3542904B1 (de)
CN (1)	CN110293479B (de)
BR (1)	BR102019005369B1 (de)
ES (1)	ES2880557T3 (de)
IT (1)	IT201800003874A1 (de)
SM (1)	SMT202100389T1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AT523622B1 (de) *	2020-02-25	2022-09-15	Ess Holding Gmbh	Nassmühle
IT202200026127A1 (it)	2022-12-20	2024-06-20	Certech S P A Con Socio Unico	iniezione aria in mulino continuo

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0219740A2 (de) *	1985-08-27	1987-04-29	Reimbold & Strick GmbH & Co. KG	Ringspalt-Kugelmühle
WO2015059591A1 (en) *	2013-10-21	2015-04-30	Dazzi Mario	Milling plant

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1642632A (en) *	1926-02-25	1927-09-13	Harry W Titgen	Tumbling mill
GB278214A (en) *	1926-12-06	1927-10-06	Traylor Engineering And Mfg Co	Improvements in and relating to ball mills
GB337911A (en) *	1929-09-27	1930-11-13	Harold Sibree Rexworthy	Improvements in grinding or crushing apparatus
BE829565A (fr) *	1974-07-25	1975-09-15		Paroi elevatrice, notamment destinee a etre montee dans un broyeur tubulaire
JPS5953157A (ja) *	1982-09-17	1984-03-27	Tipton Mfg Corp	遊星旋回式バレル加工機
LU85767A1 (fr) *	1985-02-08	1986-09-02	Communition Tech Comminutec	Dispositif de reglage du temps de retention du materiau dans un broyeur
CN2212449Y (zh) *	1995-01-08	1995-11-15	王建国	立式高细破碎机
JP2913473B2 (ja) *	1997-01-31	1999-06-28	株式会社チップトン	間隙調整機能を有する渦流バレル加工機及び退避層成形方法並びに間隙調整方法
EP0937503A1 (de) *	1998-02-20	1999-08-25	Magotteaux International S.A.	Austragsvorrichtung für Nasszerkleinerungsmaschinen
US7134623B2 (en) *	2001-05-17	2006-11-14	Rader Companies	Hammermill
TWM255758U (en) *	2003-12-11	2005-01-21	Jr-Shin Guo	Centrifugal grinding machine
ITRE20050011A1 (it) *	2005-02-11	2006-08-12	Sacmi	Sistema di collegamento tra mulini continui in serie di un impianto di macinazione
ATE361146T1 (de) *	2005-05-19	2007-05-15	Buehler Ag	Rührwerksmühle
JP5555551B2 (ja) *	2010-06-14	2014-07-23	株式会社日高ファインテクノロジーズ	研削加工装置及び研削加工方法

2018
- 2018-03-22 IT IT102018000003874A patent/IT201800003874A1/it unknown
2019
- 2019-03-06 SM SM20210389T patent/SMT202100389T1/it unknown
- 2019-03-06 ES ES19161067T patent/ES2880557T3/es active Active
- 2019-03-06 EP EP19161067.4A patent/EP3542904B1/de active Active
- 2019-03-19 BR BR102019005369-0A patent/BR102019005369B1/pt active IP Right Grant
- 2019-03-21 CN CN201910214941.8A patent/CN110293479B/zh active Active

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP0219740A2 (de) *	1985-08-27	1987-04-29	Reimbold & Strick GmbH & Co. KG	Ringspalt-Kugelmühle
WO2015059591A1 (en) *	2013-10-21	2015-04-30	Dazzi Mario	Milling plant

Also Published As

Publication number	Publication date
IT201800003874A1 (it)	2019-09-22
ES2880557T3 (es)	2021-11-24
BR102019005369A2 (pt)	2019-10-08
SMT202100389T1 (it)	2021-09-14
BR102019005369B1 (pt)	2024-02-20
CN110293479B (zh)	2022-10-04
EP3542904B1 (de)	2021-04-07
CN110293479A (zh)	2019-10-01

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Publication	Publication Date	Title
EP3542904A1 (de)	2019-09-25	Mühle für keramische materialien
KR101575027B1 (ko)	2015-12-21	교반 볼 분쇄기
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