EP0418801A1 - Procédé de broyage de céréales comme le blé ou le mais, et appareillage relatif - Google Patents

Procédé de broyage de céréales comme le blé ou le mais, et appareillage relatif Download PDF

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Publication number
EP0418801A1
EP0418801A1 EP90117907A EP90117907A EP0418801A1 EP 0418801 A1 EP0418801 A1 EP 0418801A1 EP 90117907 A EP90117907 A EP 90117907A EP 90117907 A EP90117907 A EP 90117907A EP 0418801 A1 EP0418801 A1 EP 0418801A1
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EP
European Patent Office
Prior art keywords
products
semifinished products
particle size
semifinished
reduce
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.)
Withdrawn
Application number
EP90117907A
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German (de)
English (en)
Inventor
Aldo Bassetti
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.)
Tpt Technologies SpA
Original Assignee
Tpt Technologies SpA
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 Tpt Technologies SpA filed Critical Tpt Technologies SpA
Publication of EP0418801A1 publication Critical patent/EP0418801A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C9/00—Other milling methods or mills specially adapted for grain
    • B02C9/04—Systems or sequences of operations; Plant

Definitions

  • This invention relates to a process for milling cereals, particularly wheat and maize, by which finished products such as flour and bran are obtained from crude products in the form of grains.
  • the invention also relates to the plant for implementing said process.
  • the milling scheme comprises various stages, each of which requires a series of machines comprising essentially roll mills, plansifters and purifiers.
  • the size reduction operations in the mills are separated by screening in the plansifters and selection in the purifiers.
  • Roll mills are machines provided substantially with one or more pairs of cast iron or steel rolls with smooth or knurled surfaces. By rotating in opposite directions at different speeds, the rolls break, crush and squeeze the products while simultaneously slitting the cortical fractions to separate them from the floury fraction.
  • the rolls differ according to the function which they perform, ie breaking, separation or size reduction.
  • the purpose of the breaking rolls is to open the grains of wheat or maize and detach the farinaceous endosperm from the cortical fraction, leaving this latter in the form of large-dimension flakes separable by the plansifters.
  • That semifinished material which is rejected because still too coarse is passed to a further breaking operation in a subsequent mill.
  • the separation mills which receive the coarse fractions still joined to bran fractions, separate the semolina from the bran and feed the purifiers.
  • the reduction mills reduce the particle size of the semolina fractions now free or nearly free of bran fractions, to produce increasingly fine semolina and flour.
  • the plansifters are flat screens which dimensionally classify the products from the roll mills and feed the subsequent roll mills and the purifiers.
  • They generally consist of two twin bins, each of which contains a series of overlying frames which support screens of different mesh sizes.
  • the two bins are suspended elastically and are rotated at a certain speed so that by centrifugal force the fine particles are projected outwards through the screens and are divided into batches of different particle size.
  • the purifiers separate the particles both by size, using vibrating screens, and by specific gravity, by means of an upward air stream which entrains and suspends the lighter bran flakes to separate them from the heavier semolina.
  • the purifiers can themselves feed breaking, separation and reduction mills with the different batches of material obtained.
  • mechanical breaking, crushing and squeezing operations are effected by roll mills, and/or screening and classification operations by the plansifters and purifiers, to obtain finished products which are collected, and semifinished products which are further processed in the subsequent stages.
  • flour is obtained in each stage, bran also being collected in the final stages.
  • the various machines are grouped on the various floors according to type, the batches of semifinished products which move through one or more stages travelling either in downwardly directed streams by gravity fall, or in upwardly directed streams by a pneumatic system comprising a compressor or fan unit, a bank of cyclones, connection piping and filters for recovering small flour particles present in the air leaving the mill.
  • a pneumatic system comprising a compressor or fan unit, a bank of cyclones, connection piping and filters for recovering small flour particles present in the air leaving the mill.
  • the production cycle is rather long because a number of successive processing stages are required to obtain the most refined finished products.
  • Centrifugal impact mills are known, for example from Italian patent applications Nos. 12442 A/87 and 15142 B/87, which reduce the product particle size by the impact of particles entrained in a fluid stream with each other and against suitable surfaces.
  • Pneumatic centrifugal separators are also known which effectively select the components of milling products on the basis of their specific gravity, such as those described in Italian patents Nos. 1,171,172 and 1,157,470.
  • An object of the present invention is a milling process which requires a smaller number of operations and is therefore more simple and rapid than traditional processes, and which ensures the quality of the final products.
  • a further object of the invention is to provide a milling process by which plant and production costs are reduced.
  • a further object of the invention is to provide a plant for implementing said process.
  • said process is implemented in a plant comprising a breaking roll mill for the crude products in the form of grains, to provide first semifinished products and first finished products, the plant being characterised by comprising at least one centrifugal impact mill arranged to reduce the particle size of said first semifinished products, and at least one pneumatic separator arranged to divide the components of said first semifinished products on the basis of their specific gravity, to obtain at least second semifinished products, the plant also comprising at least one further mill arranged to reduce the particle size of said second semifinished products, to provide at least second finished products.
  • the different component parts of wheat or maize grains can be separated to obtain flour and bran with maximum yield, while simultaneously accomplishing a substantial shortening of the production cycle and eliminating numerous machines, particularly roll mills.
  • the reference numeral 10 indicates overall a plant for milling cereals, particularly wheat or maize.
  • 11 indicates a breaking roll mill and 12 and 13 indicate its entry and exit respectively.
  • 14 indicates a plansifter and 15 and 16 indicate a first and second exit thereof.
  • 17 indicates a centrifugal impact mill for example as described in Italian patent applications Nos. 12442 A/87 and 15142 B/82, and 18 indicates overall a unit comprising two pneumatic separators such as that described in Italian patent No. 1171172.
  • 21 indicates a cyclone separator and 22 its exit.
  • 23 indicates a plansifter and 24, 25, 26 its exits.
  • 27 indicates a centrifugal impact mill
  • 28 indicates a pneumatic separator and 29 its exit.
  • 30 indicates a plansifter and 31 and 32 its exits.
  • 35 indicates a reduction roll mill and 36 its exit.
  • 37 indicates a separation roll mill and 38 its exit;
  • 39 indicates a plansifter and 40 and 41 its exits.
  • 42 indicates a centrifugal impact mill and 43 its exit.
  • 44 indicates a purifier and 45 its exit;
  • 46 indicates a reduction roll mill and 47 its exit.
  • the suitably cleaned crude product in the form of wheat or maize grains enters the roll mill 11 where the grains are broken.
  • the first semifinished products leaving it are screened, ie dimensionally classified, in the plansifter 14, from the exit 15 of which coarse flours are obtained as first finished products, the remaining semifinished products flowing through the line 16 to the centrifugal mill 17, to then enter the unit 18.
  • the first semifinished products are subjected to impact milling, the product components being reduced and selected in the unit 18, which is formed from two pneumatic separators such as that described in the patent 1,171,172.
  • second and third semifinished products are classified and leave through the exits 19 and 20 respectively.
  • the finished products are collected in the cyclone 21 and leave through the exit 22.
  • the coarser semifinished products leaving through the exit 19 are screened and dimensionally classified in the plansifter 23. Finished products leave through the exit 25 of the plansifter 23, while semifinished products leave through the exit 26 and are separated in the purifier 33 on the basis of their size and specific gravity, to then be subjected to particle size reduction in the reduction roll mill 35, after which they leave through the exit 36 as finished products in the form of very fine flours.
  • the other second semifinished products leaving the plansifter 23 through the exit 24 enter a centrifugal impact mill 27 and then enter the centrifugal disintegrator 28, which further reduces the particle size of said products to provide fourth semifinished products.
  • the mill 27 is preferably a micronizer, such as that described in patent applications Nos. 12442 A/87 and 15142 B/87, its purpose being to effect initial separation of the semolina fractions from the bran fractions by the impact of the particles with each other and against suitable surfaces of break-up rings, against which the material, entrained by air stream, is projected by distributor discs.
  • the fourth semifinished products leave through the exit 29 to reach the plansifter 30, where they undergo screening to provide finished products, ie fairly fine flour, through the exit 32 and semifinished products through the exit 31.
  • the third semifinished products leaving the exit 20 of the unit 18 are processed in the separation roll mill 37, where the semolina fractions are separated from the bran, and are then screened in the plansifter 39.
  • the bran leaves through the exit 40 of the plansifter 39, passes through the centrifugal impact mill 42 and is fed to the exit 43, while fifth semifinished products are obtained through the exit 41 of the plansifter 39, to be treated in the purifier 44 together with the semifinished products leaving the exit 31 of the plansifter 30.
  • the products screened by the purifier 44 are subjected to particle size reduction in the reduction roll mill 46, to be then fed to the exit 47 as finished products in the form of very fine flour.
  • the described milling process and plant have various advantages over the traditional, in particular because they enable numerous roll mills, in particular the breaking mills, and various plansifters and purifiers to be eliminated.
  • the bran is also "cleaner" because it is free of starchy fractions and is drier, so that its storage and preservation are facilitated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)
  • Cereal-Derived Products (AREA)
EP90117907A 1989-09-21 1990-09-18 Procédé de broyage de céréales comme le blé ou le mais, et appareillage relatif Withdrawn EP0418801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8921779A IT1232673B (it) 1989-09-21 1989-09-21 Procedimento di macinazione di cereali, quali frumento e mais, e relativo impianto.
IT2177989 1989-09-21

Publications (1)

Publication Number Publication Date
EP0418801A1 true EP0418801A1 (fr) 1991-03-27

Family

ID=11186745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90117907A Withdrawn EP0418801A1 (fr) 1989-09-21 1990-09-18 Procédé de broyage de céréales comme le blé ou le mais, et appareillage relatif

Country Status (3)

Country Link
EP (1) EP0418801A1 (fr)
JP (1) JPH03135448A (fr)
IT (1) IT1232673B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2053393A1 (es) * 1992-11-12 1994-07-16 Provedora Hispano Holandesa S Procedimiento para la molturacion de los frutos secos del pimiento y producto obtenido por dicho procedimiento.
AT405616B (de) * 1997-08-08 1999-10-25 Dyk Peter Anlage zum herstellen von mehlen, griess und dergleichen mahlprodukten
EP1213054A1 (fr) * 2000-09-13 2002-06-12 The Quaker Oats Company Procédé pour le broyage de mais
US6953165B1 (en) 2000-09-13 2005-10-11 The Quaker Oats Company Corn milling process
CN108405068A (zh) * 2018-02-09 2018-08-17 河南迪普森农业开发有限公司 高精度低斑点糯米粉的制作工艺及系统
CN109550566A (zh) * 2018-10-29 2019-04-02 甘肃酒钢集团宏兴钢铁股份有限公司 一种降低磨矿能耗、减少过粉碎的磨矿工艺
CN110180662A (zh) * 2019-05-30 2019-08-30 山东鲁信四砂泰山磨料有限公司 刚玉粉的制备工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5090684B2 (ja) * 2005-08-01 2012-12-05 日清製粉株式会社 小麦全粒粉の製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB830039A (en) * 1955-06-07 1960-03-09 Jiyuichi Nara Improvements in or relating to the manufacture of wheat flour
US3430869A (en) * 1965-03-23 1969-03-04 Gen Mills Inc Milling process for rye
FR2307475A1 (fr) * 1975-04-18 1976-11-12 Siraga Procede et dispositif pour preparer une mouture de provenderie ayant une composition granulometrique choisie
US4133899A (en) * 1976-03-16 1979-01-09 Nabisco, Inc. Farina milling process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB830039A (en) * 1955-06-07 1960-03-09 Jiyuichi Nara Improvements in or relating to the manufacture of wheat flour
US3430869A (en) * 1965-03-23 1969-03-04 Gen Mills Inc Milling process for rye
FR2307475A1 (fr) * 1975-04-18 1976-11-12 Siraga Procede et dispositif pour preparer une mouture de provenderie ayant une composition granulometrique choisie
US4133899A (en) * 1976-03-16 1979-01-09 Nabisco, Inc. Farina milling process

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2053393A1 (es) * 1992-11-12 1994-07-16 Provedora Hispano Holandesa S Procedimiento para la molturacion de los frutos secos del pimiento y producto obtenido por dicho procedimiento.
AT405616B (de) * 1997-08-08 1999-10-25 Dyk Peter Anlage zum herstellen von mehlen, griess und dergleichen mahlprodukten
EP1213054A1 (fr) * 2000-09-13 2002-06-12 The Quaker Oats Company Procédé pour le broyage de mais
US6953165B1 (en) 2000-09-13 2005-10-11 The Quaker Oats Company Corn milling process
EP1669136A2 (fr) * 2000-09-13 2006-06-14 The Quaker Oats Company Procédé pour le broyage de mais
EP1669136A3 (fr) * 2000-09-13 2006-07-05 The Quaker Oats Company Procédé pour le broyage de mais
CN108405068A (zh) * 2018-02-09 2018-08-17 河南迪普森农业开发有限公司 高精度低斑点糯米粉的制作工艺及系统
CN108405068B (zh) * 2018-02-09 2023-10-20 河南迪普森农业开发有限公司 高精度低斑点糯米粉的制作工艺及系统
CN109550566A (zh) * 2018-10-29 2019-04-02 甘肃酒钢集团宏兴钢铁股份有限公司 一种降低磨矿能耗、减少过粉碎的磨矿工艺
CN110180662A (zh) * 2019-05-30 2019-08-30 山东鲁信四砂泰山磨料有限公司 刚玉粉的制备工艺

Also Published As

Publication number Publication date
JPH03135448A (ja) 1991-06-10
IT1232673B (it) 1992-03-02
IT8921779A0 (it) 1989-09-21

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