EP2988875A2 - Device for comminuting abrasive materials - Google Patents
Device for comminuting abrasive materialsInfo
- Publication number
- EP2988875A2 EP2988875A2 EP14722137.8A EP14722137A EP2988875A2 EP 2988875 A2 EP2988875 A2 EP 2988875A2 EP 14722137 A EP14722137 A EP 14722137A EP 2988875 A2 EP2988875 A2 EP 2988875A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- welds
- iron
- chromium
- wear protection
- carbides
- 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- Withdrawn
Links
- 239000003082 abrasive agent Substances 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- ZBHWCYGNOTVMJB-UHFFFAOYSA-N [C].[Cr].[Fe] Chemical compound [C].[Cr].[Fe] ZBHWCYGNOTVMJB-UHFFFAOYSA-N 0.000 claims description 8
- 229910001018 Cast iron Inorganic materials 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 6
- 239000011651 chromium Substances 0.000 claims description 6
- -1 chromium carbides Chemical class 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910001141 Ductile iron Inorganic materials 0.000 claims description 3
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 229910001339 C alloy Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 235000019589 hardness Nutrition 0.000 description 7
- 239000004568 cement Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005552 hardfacing Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
- B02C1/10—Shape or construction of jaws
-
- 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
Definitions
- the invention relates to a device for the comminution of abrasive materials with at least one component which is provided with a welded wear protection profiling.
- These devices are, for example, roller presses or vertical roller mills, as used in particular in the cement and mineral industries.
- the coming into contact with the material to be crushed components, such as grinding rollers or grinding plates are exposed to various wear mechanisms, such as adhesion, abrasion or tribochemical reactions or a combination of these wear mechanisms during operation.
- wear protection is formed by build-up welding, single-layer or multi-layer wear protective layers are applied using different welding methods.
- the welds usually consist of a highly wear-resistant iron-chromium-carbon hard alloy with additions of niobium, titanium, boron, molybdenum, vanadium, tungsten and manganese and hardnesses of more than 55 HRC.
- These alloys have a martensitic and / or austenitic matrix with embedded hard phases.
- the hard phases are chromium carbides and special carbides that form primarily or eutectically.
- the carbide content and their size are significantly higher than is possible in the cast state.
- the pure weld metal of these hard alloys have higher wear resistance.
- forged materials or wear-resistant cast iron materials are used for crushing rollers.
- surface build-up welding is essential to protect the material during operation.
- a profiling is welded on for procedural reasons.
- crushing rollers of wear-resistant cast iron materials have a flat surface Build-up welding not necessary so that only a welded-on profiling is applied.
- highly wear-resistant iron-chromium-carbon hard alloys are used for these profiling.
- a wear-resistant cast iron material for comminution rolls is provided with build-up welds.
- the wear protective layer is formed by applying weld beads of a wear-resistant hardfacing material on the surface of a chill cast roll shell.
- cracks have already been found in the weld metal when the hardfacing material has cooled
- the invention has for its object to provide a wear protection profiling of an iron-chromium-carbon hard alloy, which is substantially free of cracks.
- the inventive device for comminuting abrasive materials with at least one component is provided with a wear protection profiling, which is formed by a plurality of welds of an iron-chromium carbon hard alloy having a hardness of more than 55 HRC, wherein the welds a geometric relationship of length to width of ⁇ 4, preferably ⁇ 2.5, preferably ⁇ 1.5.
- the weld metal undergoes a volume shrinkage during solidification, wherein the longitudinal shrinkage in the welding direction is hindered by the own supporting effect within the weld metal and in this way tensile stresses arise within the weld metal. These tensile stresses are reduced when exceeding the yield strength by a classic deformation of the weld metal in the welding direction. If the tensile stresses exceed the tensile strength of the weld metal, cracking occurs transversely to the welding direction. If the geometric ratio of length to width is ⁇ 4 Free shrinkage without shrinkage hindrance of the weld metal allows and the stress build-up within the weld metal is reduced so much that cracking does not occur.
- the welds are preferably applied at a distance from each other, which may in particular also result in repetitive patterns.
- the welds may preferably have a height of up to 15 mm, preferably up to 10 mm and most preferably in the range of 3 to 7 mm.
- the welds can be formed by welds or preferably by welds. In the case of spot welds, it has proven to be advantageous if the diameter is in the range of 7 to 25 mm, preferably in the range of 10 to 20 mm and the height in the range of 7 to 20 mm.
- the weld filler used for the welds may form special carbides (such as niobium, vanadium, titanium) besides iron and chromium carbides.
- the wear protection profiling is preferably applied to a body which is characterized by a. a bainitic ductile iron having an elongation at break of about 0.1 to 2.5%, a compressive strength of 1,000 to about 1,800 MPa and a hardness of 42 to 55 HRC or b. a carbide white solidified cast iron material with iron, chromium, molybdenum, vanadium and / or niobium carbides or c. a forged material is formed.
- the component on which the welded wear protection profiling is applied is preferably a roller, a roller, a cone, a ball or a crushing jaw for a mill or a crusher. In addition, it may be a grinding track or trays of a mill. Further advantages and embodiments of the invention are explained below with reference to the following description and the drawing.
- FIG. 1 is a schematic representation of a roller press
- Fig. 2 is a schematic representation of a grinding roller
- Fig. 3 is an enlarged, schematic representation of
- FIG. 4 is a sectional view taken along the line A-A of FIG. 2,
- Fig. 6 is a schematic plan view of a weld formed as
- Fig. 7 is a sectional view taken along the line B-B of Fig. 6 and
- Fig. 8 shows various forms of welds for the
- the apparatus shown in Figures 1 and 2 for the comminution of abrasive materials is a roller press with two mutually pressed and counter-driven grinding rollers 1, 2, and can be formed, for example, as a good bed roller mill, as used in the cement and minerals industry.
- the rolls have a diameter of usually 1 to 2 m.
- the peripheral surface of the grinding rolls 1, 2 is provided with a wear protection profiling 3, which has a plurality of welds 4 made of an iron-chromium carbon hard alloy having a hardness of more than 55 HRC (Rockwell hardness).
- HRC Rockwell hardness
- the welds in this exemplary embodiment are characterized by short weld seams with a geometric weld Ratio of length L to width B of about 3 is formed.
- the height H is a maximum of 15 mm and is preferably in the range of about 7 to 10 mm.
- the welds 4 are applied in a repeating pattern that forms a herringbone pattern in this case. In the context of the invention, however, other patterns and basically irregular patterns are conceivable. In Fig. 5 different patterns for wear protection profiling are shown.
- the welds 4 can basically assume any desired shapes, provided that the geometric ratio of length to width ⁇ 4 is selected.
- a preferred embodiment is shown in which the welds as
- the diameter D is preferably in the range of 7 to 25 mm, preferably in the range of 10 to 20 mm and the height is preferably in the range of 7 to 20 mm.
- the wear protection profiling 3 is applied to a body, in particular a main body 5, which can be formed in particular from the following materials: a. a bainitic ductile iron having an elongation at break of about 0.1 to 2.5%, a compressive strength of 1,000 to about 1,800 MPa and a hardness of 42 to
- the wear profiling serves on the one hand to protect the relatively softer base body 5 and on the other hand also to favor the collection of the material to be shredded.
- a s see Fig. 3
- welds of an iron-chromium-carbon hard alloy with a hardness of more than 55 HRC can be formed free of cracks if the geometric ratio of length L to width B ⁇ 4, preferably ⁇ 2.5 , preferably ⁇ 1.5 is selected.
- the crack-free design also results in a longer life of wear protection profiling.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Crushing And Grinding (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Earth Drilling (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013104098.5A DE102013104098A1 (en) | 2013-04-23 | 2013-04-23 | Device for the comminution of abrasive materials |
PCT/EP2014/058102 WO2014173877A2 (en) | 2013-04-23 | 2014-04-22 | Device for comminuting abrasive materials |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2988875A2 true EP2988875A2 (en) | 2016-03-02 |
Family
ID=50680010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14722137.8A Withdrawn EP2988875A2 (en) | 2013-04-23 | 2014-04-22 | Device for comminuting abrasive materials |
Country Status (12)
Country | Link |
---|---|
US (1) | US20160101425A1 (en) |
EP (1) | EP2988875A2 (en) |
CN (1) | CN105142792B (en) |
AU (1) | AU2014257641B2 (en) |
BR (1) | BR112015024483A2 (en) |
CA (1) | CA2907838C (en) |
CL (1) | CL2015002846A1 (en) |
DE (1) | DE102013104098A1 (en) |
MX (1) | MX2015012374A (en) |
PE (1) | PE20160139A1 (en) |
RU (1) | RU2650906C2 (en) |
WO (1) | WO2014173877A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL2020403B1 (en) * | 2018-02-08 | 2019-08-19 | Weir Minerals Netherlands Bv | A roll for a roller press suitable for comminution of granular material by interparticle crushing, as well as a roller press provided with such a roll. |
FI4065281T3 (en) * | 2019-11-26 | 2024-03-26 | Smidth As F L | Wear-resistant element for a comminution device |
RU210365U1 (en) * | 2021-12-13 | 2022-04-14 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Липецкий государственный технический университет" (ЛГТУ) | Four Roll Crusher Roll |
RU210515U1 (en) * | 2022-01-12 | 2022-04-19 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Липецкий государственный технический университет" (ЛГТУ) | Four Roll Crusher Roll |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4038798A (en) * | 1975-03-05 | 1977-08-02 | U-Forms International, Inc. | Composite permanent block-form for reinforced concrete construction and method of making same |
US4604781A (en) * | 1985-02-19 | 1986-08-12 | Combustion Engineering, Inc. | Highly abrasive resistant material and grinding roll surfaced therewith |
CH669026A5 (en) * | 1985-12-23 | 1989-02-15 | Sulzer Ag | WORKPIECE WITH RIBS AND METHOD FOR THE PRODUCTION THEREOF. |
DE4036040C2 (en) * | 1990-02-22 | 2000-11-23 | Deutz Ag | Wear-resistant surface armor for the rollers of roller machines, especially high-pressure roller presses |
DE4038798A1 (en) * | 1990-12-05 | 1992-06-11 | Krupp Polysius Ag | Roller mill - has two rollers circulating in opposite directions pressed together under high pressure and each with cover forming grinding surface |
DE4210395A1 (en) | 1992-03-30 | 1993-10-07 | Krupp Polysius Ag | Roller mill |
DE4232045A1 (en) * | 1992-09-24 | 1994-03-31 | Krupp Polysius Ag | Brittle-material crusher with contra-rotating tools - has tool length less than dia. and gap between them less than thickness of crushed material in scab form |
DE19506600A1 (en) * | 1995-02-24 | 1996-08-29 | Krupp Polysius Ag | Roll, process for producing a roll and material bed roll mill |
DE19750144A1 (en) | 1997-11-12 | 1999-06-02 | Krupp Polysius Ag | Process for producing a grinding roller |
DE102005027729A1 (en) * | 2005-06-16 | 2006-12-28 | Khd Humboldt Wedag Gmbh | Roll crusher for breaking hot cement clinker |
CA2585688C (en) * | 2007-04-20 | 2014-10-14 | Igor Tsypine | Wear-resistant castings and method of fabrication thereof |
DE102009039928B3 (en) * | 2009-08-17 | 2011-03-03 | Khd Humboldt Wedag Gmbh | Roll press screen armoring with ring-shaped bolts and method for renewing the reinforcement of this grid armor |
DE102010024221A1 (en) * | 2010-06-18 | 2011-12-22 | Khd Humboldt Wedag Gmbh | Profiled bandage for a roller press |
DE102011104854B4 (en) * | 2011-06-21 | 2015-06-11 | Khd Humboldt Wedag Gmbh | Grinding roller with hard bodies inserted into the surface |
-
2013
- 2013-04-23 DE DE102013104098.5A patent/DE102013104098A1/en not_active Withdrawn
-
2014
- 2014-04-22 BR BR112015024483A patent/BR112015024483A2/en not_active IP Right Cessation
- 2014-04-22 US US14/786,444 patent/US20160101425A1/en not_active Abandoned
- 2014-04-22 CA CA2907838A patent/CA2907838C/en not_active Expired - Fee Related
- 2014-04-22 MX MX2015012374A patent/MX2015012374A/en unknown
- 2014-04-22 AU AU2014257641A patent/AU2014257641B2/en not_active Ceased
- 2014-04-22 EP EP14722137.8A patent/EP2988875A2/en not_active Withdrawn
- 2014-04-22 CN CN201480022403.4A patent/CN105142792B/en not_active Expired - Fee Related
- 2014-04-22 PE PE2015001984A patent/PE20160139A1/en active IP Right Grant
- 2014-04-22 WO PCT/EP2014/058102 patent/WO2014173877A2/en active Application Filing
- 2014-04-22 RU RU2015150043A patent/RU2650906C2/en not_active IP Right Cessation
-
2015
- 2015-09-24 CL CL2015002846A patent/CL2015002846A1/en unknown
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2014173877A2 * |
Also Published As
Publication number | Publication date |
---|---|
CL2015002846A1 (en) | 2016-03-28 |
RU2015150043A3 (en) | 2018-03-19 |
US20160101425A1 (en) | 2016-04-14 |
DE102013104098A1 (en) | 2014-10-23 |
WO2014173877A2 (en) | 2014-10-30 |
BR112015024483A2 (en) | 2017-07-18 |
AU2014257641A1 (en) | 2015-10-22 |
MX2015012374A (en) | 2016-04-19 |
PE20160139A1 (en) | 2016-03-19 |
RU2650906C2 (en) | 2018-04-18 |
WO2014173877A3 (en) | 2014-12-24 |
CN105142792B (en) | 2018-12-04 |
CA2907838C (en) | 2017-03-07 |
CA2907838A1 (en) | 2014-10-30 |
CN105142792A (en) | 2015-12-09 |
AU2014257641B2 (en) | 2018-01-04 |
RU2015150043A (en) | 2017-05-24 |
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Legal Events
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DAX | Request for extension of the european patent (deleted) | ||
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Owner name: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG |
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