WO2015015507A1 - Cylindre de broyage pour broyeur à cylindres vertical et son procédé de fabrication - Google Patents

Cylindre de broyage pour broyeur à cylindres vertical et son procédé de fabrication Download PDF

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Publication number
WO2015015507A1
WO2015015507A1 PCT/IN2013/000585 IN2013000585W WO2015015507A1 WO 2015015507 A1 WO2015015507 A1 WO 2015015507A1 IN 2013000585 W IN2013000585 W IN 2013000585W WO 2015015507 A1 WO2015015507 A1 WO 2015015507A1
Authority
WO
WIPO (PCT)
Prior art keywords
roll
insert
roll body
grinding
vertical roller
Prior art date
Application number
PCT/IN2013/000585
Other languages
English (en)
Inventor
Ashish KANODIA
Original Assignee
Balaji Industrial Products Ltd.,
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 Balaji Industrial Products Ltd., filed Critical Balaji Industrial Products Ltd.,
Publication of WO2015015507A1 publication Critical patent/WO2015015507A1/fr

Links

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
    • B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
    • B02C15/004—Shape or construction of rollers or balls
    • B02C15/005—Rollers or balls of composite construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/30—Shape or construction of rollers
    • B02C4/305—Wear resistant rollers

Definitions

  • the present invention relates to vertical roller mill. It particularly relates to wear resistant components of the vertical roller mill. More specifically it relates to grinding roll for the vertical roller mill.
  • mills In industries, various kinds of equipments, which are called mills, are used to crush or grind materials. For examples, coal is ground in thermal power plants, limestone, coal and clinker is ground in cement plants and various others like gold, zinc, iron are crushed in mining industries before they are purified. There are various kinds of mills being used in such industries. A few examples are Horizontal mill, which is a rotary drum kind of a structure having wear resistant liners to protect the shell of the mill,
  • mill includes E-mill which has a bottom ring, a top ring and hollow balls. The balls revolve on the track of the ring crushing the material to be crushed. There are other peripherals and methods to take out the crushed material.
  • roller mill Another type of mill is roller mill.
  • Roller mills have gained a firm footing in many industrial branches for the size reduction of bulk materials.
  • Roller mills are also known as bowl mills or vertical roller mills.
  • the advantages of mills for size reduction are not only their high throughput rates but also the high quality of the final product with respect to particle size and size distribution as well as their energy demand.
  • Roller mills are typically used in coal fired power plants and cement plants. In power plants they are used for grinding coal and in cement plants for raw material size reduction as well as for grinding coal. Lately there has been a growing demand for these types of mills for finished cement grinding and the grinding of granulated blast furnace slag.
  • the two main wear resistant components are grinding rollers and table liners.
  • wear resistant hard weld alloy is deposited over mild steel cast rolls by the process of welding.
  • the thickness of weld may vary depending on the life desired also depending on various other factors. ii. Hi-Cr grinding rolls:
  • the complete grinding roll is cast from a wear resistant and hard grade of High Chrome.
  • Hi-Cr material is wasted in the core, which is never ground, but also that it has to be annealed in order to machine the core of Hi-Cr material.
  • the outer surface which helps in grinding (and is consumed) is cast in wear resistant and hard Ni-hard grade through centrifugal casting process, where as the core is in cast iron, which is not only cheaper but also is easier to machine.
  • inserts are missing.
  • inserts are provided as a wear resistant component. These inserts are made of hard and wear resistant material.
  • US Pat. No. 5,114,082 discloses rolling mill comprising grinding rollers and a grinding path each having a fastening body of ferrous material for attaching a grinding surface including a cladding of wear- resistant segments made from a ceramic compound and tightly fixed to said fastening bodies, the segments having outer faces which form the entire grinding surfaces, and in which said fastening bodies of said grinding rollers and said grinding path facing the grinding rollers have a step-like configuration in axial section which support the segments of the cladding for positively fixing said segments against dynamic stressing forces in the radial direction of the grinding surfaces of the rolling mill.
  • US Publ. No. 2007/0215733 discloses grinding rolls in particular for high-pressure roller mills or rolling presses for pressure grinding a granular material not only with a wear-resistant coating but also with a face armour plating in the area of the roller annular edge, which has a long service life due to the high wear resistance thereof and whose production and repair are, in general, relatively simple and inexpensive.
  • the inventive face armour plating consists of a plurality of prefabricated hard bodies which are circularly arranged side by side in such a way that the circular face edge of the roller is formed, said hard bodies are disposed ,on said circular shoulder of a roll shell such that said hard bodies are placed axially and radially against said circular shoulder of the roll shell and are movably assembled with the roll shell.
  • the primary object of the present invention is to provide a grinding roll to be used in vertical roller mill which is having long lasting wear life.
  • Another object of the invention is to provide a grinding roll to be used in vertical roller mill which is economic.
  • Still another object of the invention is to provide a grinding roll to be used in vertical roller mill which is easy to manufacture.
  • the present invention provides a grinding roll for vertical roller mill, the grinding roll comprising: roll body having inner periphery and outer periphery; at least one insert being placed inside the roll body; characterized in that the insert is placed inside the roll body such that the insert is near to the inner periphery of roll body and away from the outer periphery of roll body, the insert does not make part of the inner periphery and outer periphery of roll body and gap between the insert and outer periphery of the roll body is filled by hard facing or welding.
  • the present invention also provides a method of manufacturing a grinding roll for vertical roller mill, the grinding roll comprises roll body having inner periphery and outer periphery and at least one insert being placed inside the roll body, the method comprising: placing the insert inside the roll body such that the insert is near to the inner periphery of roll body and away from the outer periphery of roll body, the insert does not make part of the inner periphery and outer periphery of roll body; filling gap between the insert and inner periphery of the roll body by spheroidal graphite cast iron; and filling gap between the insert and oiiter periphery of the roll body by hard facing or welding.
  • Fig.1 Shows perspective view of grinding roll for vertical roller mill in accordance to present invention.
  • Fig. 2 Shows sectional view of grinding roll for vertical roller mill in accordance to present invention.
  • Fig. 3 Shows top view of grinding roll for vertical roller mill in accordance to present invention.
  • Fig. 4 Shows exploded sectional view of grinding roll for vertical roller mill in accordance to present invention.
  • the grinding roll (1) includes roll body (2) and one or more inserts (5).
  • the roll body (2) comprises an inner periphery (3) and outer periphery (4).
  • the roll body (2) is made of metal preferably of spheroidal graphite cast iron.
  • the insert (5) is placed inside the roll body (2).
  • the insert (5) includes a part (6) made of wear resistant material.
  • the part (6) is generally made of ceramic material.
  • the part (6) is surrounded by metal part (7).
  • the metal part (7) is generally made of high chromium steel.
  • plurality of inserts (5) placed adjacent to each other are shown.
  • the insert (5) is placed in the roll body (2) in such a way that the insert (5) does not make the part of inner periphery (4) and outer periphery (3) of the roll body (2).
  • the insert (5) is placed away from the outer periphery (3) of the roll body (2) and near to the inner periphery (4) of the roll body (2), but not even on the periphery of the inner periphery (4).
  • the gap between the insert (3) and the outer periphery (3) of the roll body (2) is filled by way of hard facing or welding.
  • the hard facing or welding is done with a wear resistant high chromium welding wire. It not only provides an additional wear life but also enhances the binding strength of the insert (5) around the grinding roll (1).
  • the hard facing is done to a minimum thickness of 3 mm and go up to 30 mm, depending on the output in terms of life required versus the cost to be incurred. In another embodiment, the hard facing is done only in the surface which is prone to high wear and not in the areas which is prone to comparatively low wear.
  • Gap between the insert (5) and inner periphery (4) of the roll body (2) is filled by spheroidal graphite cast iron.
  • the present invention also provides the method of manufacturing grinding roll. Firstly the inserts (5) are placed adjacent to each other inside the roll body (2) such that the insert (5) is near to the inner periphery (4) of roll body and away from the outer periphery (3) of roll body. The insert (5) does not make part of the inner periphery and outer periphery of roll body (2). Then the gap between the insert (5) and inner periphery (4) of the roll body is filled by spheroidal graphite cast iron. The gap between the insert (5) and outer periphery (3) of the roll body by hard facing or welding.

Abstract

La présente invention porte sur un cylindre de broyage pour une broyeur à cylindres vertical, lequel cylindre comprend un corps de cylindre (2) ayant une périphérie interne (4) et une périphérie externe (3), et au moins un élément rapporté (5) étant disposé à l'intérieur du corps de cylindre (2). L'élément rapporté (5) est disposé à l'intérieur du corps de cylindre (2) de telle sorte que l'élément rapporté (5) est proche de la périphérie interne (4) du corps de cylindre et éloigné de la périphérie externe (3) du corps de cylindre (2). L'élément rapporté (5) ne fait pas partie de la périphérie interne (4) et de la périphérie externe (3) du corps de cylindre (2), et un espace entre l'élément rapporté (5) et la périphérie externe (3) du corps de cylindre (2) est rempli par un rechargement dur ou une soudure. L'invention porte également sur un procédé de fabrication d'un tel cylindre de broyage.
PCT/IN2013/000585 2013-07-30 2013-09-27 Cylindre de broyage pour broyeur à cylindres vertical et son procédé de fabrication WO2015015507A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN2522MU2013 2013-07-30
IN2522/MUM/2013 2013-07-30

Publications (1)

Publication Number Publication Date
WO2015015507A1 true WO2015015507A1 (fr) 2015-02-05

Family

ID=49911761

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2013/000585 WO2015015507A1 (fr) 2013-07-30 2013-09-27 Cylindre de broyage pour broyeur à cylindres vertical et son procédé de fabrication

Country Status (1)

Country Link
WO (1) WO2015015507A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106111254A (zh) * 2016-08-26 2016-11-16 江苏新业重工股份有限公司 一种辊压机的压辊
CN107081204A (zh) * 2017-05-18 2017-08-22 广东博晖机电有限公司 一种用于陶瓷原料颗粒研磨的耐磨磨辊
EP3308861A1 (fr) * 2016-10-12 2018-04-18 Magotteaux International S.A. Galet de broyage
RU2781511C2 (ru) * 2020-02-11 2022-10-12 Маготто Интернасьональ С.А. Композитная изнашиваемая деталь
US11534822B2 (en) 2020-02-11 2022-12-27 Magotteaux International S.A. Composite wear part

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4107416A1 (de) * 1990-04-25 1991-11-28 Gisag Ag Giesserei Masch Verfahren zur herstellung von partiell verschleissgeschuetzten gussstuecken
US5114082A (en) 1989-06-29 1992-05-19 Leosche Gmbh Grinding surface of rolling mills
EP0575685A1 (fr) * 1992-06-23 1993-12-29 Sulzer Innotec Ag Moulage de précision ayant des surfaces d'usure
US20020136857A1 (en) * 1996-10-01 2002-09-26 Magotteaux International S.A. Composite wear component
US20070184235A1 (en) * 2004-03-03 2007-08-09 Magotteaux International Sa Grinding rollers for a vertical crusher
US20070215733A1 (en) 2003-11-22 2007-09-20 Christian Splinter Grinding Roller for the Pressure Communication of Granular Material
US20120256030A1 (en) * 2010-04-23 2012-10-11 Flsmidth A/S Wearable Surface For a Device Configured For Material Comminution

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5114082A (en) 1989-06-29 1992-05-19 Leosche Gmbh Grinding surface of rolling mills
DE4107416A1 (de) * 1990-04-25 1991-11-28 Gisag Ag Giesserei Masch Verfahren zur herstellung von partiell verschleissgeschuetzten gussstuecken
EP0575685A1 (fr) * 1992-06-23 1993-12-29 Sulzer Innotec Ag Moulage de précision ayant des surfaces d'usure
US20020136857A1 (en) * 1996-10-01 2002-09-26 Magotteaux International S.A. Composite wear component
US20070215733A1 (en) 2003-11-22 2007-09-20 Christian Splinter Grinding Roller for the Pressure Communication of Granular Material
US20070184235A1 (en) * 2004-03-03 2007-08-09 Magotteaux International Sa Grinding rollers for a vertical crusher
US20120256030A1 (en) * 2010-04-23 2012-10-11 Flsmidth A/S Wearable Surface For a Device Configured For Material Comminution

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106111254A (zh) * 2016-08-26 2016-11-16 江苏新业重工股份有限公司 一种辊压机的压辊
EP3308861A1 (fr) * 2016-10-12 2018-04-18 Magotteaux International S.A. Galet de broyage
WO2018069006A1 (fr) * 2016-10-12 2018-04-19 Magotteaux International S.A. Galet de broyage
CN109843442A (zh) * 2016-10-12 2019-06-04 曼格特奥克斯国际有限公司 磨辊
RU2730026C1 (ru) * 2016-10-12 2020-08-14 Маготто Интернасьональ С.А. Измельчающий валок
US11123742B2 (en) 2016-10-12 2021-09-21 Magotteaux International S.A. Grinding roller
AU2017342978B2 (en) * 2016-10-12 2022-09-15 Magotteaux International S.A. Grinding roller
CN107081204A (zh) * 2017-05-18 2017-08-22 广东博晖机电有限公司 一种用于陶瓷原料颗粒研磨的耐磨磨辊
RU2781511C2 (ru) * 2020-02-11 2022-10-12 Маготто Интернасьональ С.А. Композитная изнашиваемая деталь
US11534822B2 (en) 2020-02-11 2022-12-27 Magotteaux International S.A. Composite wear part

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