AU2016201564B2 - Grinding track for a comminution installation - Google Patents
Grinding track for a comminution installation Download PDFInfo
- Publication number
- AU2016201564B2 AU2016201564B2 AU2016201564A AU2016201564A AU2016201564B2 AU 2016201564 B2 AU2016201564 B2 AU 2016201564B2 AU 2016201564 A AU2016201564 A AU 2016201564A AU 2016201564 A AU2016201564 A AU 2016201564A AU 2016201564 B2 AU2016201564 B2 AU 2016201564B2
- Authority
- AU
- Australia
- Prior art keywords
- wear protection
- grinding track
- base plate
- support plate
- wear
- 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.)
- Ceased
Links
- 238000009434 installation Methods 0.000 title claims abstract description 12
- 230000001012 protector Effects 0.000 claims abstract description 9
- 230000000712 assembly Effects 0.000 claims description 24
- 238000000429 assembly Methods 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005219 brazing Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000005476 soldering Methods 0.000 claims description 5
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 239000002436 steel type Substances 0.000 description 6
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229910003470 tongbaite Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910000679 solder Inorganic materials 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
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/282—Shape or inner surface of mill-housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/282—Shape or inner surface of mill-housings
- B02C2013/2825—Shape or inner surface of mill-housings with fastening means for fixing lining members to the inner surface of mill-housings
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Crushing And Pulverization Processes (AREA)
Abstract
Abstract The present invention relates to a grinding track 16 for a comminution installation 10, in 5 particular a hammer mill or a vertical mill. The grinding track 16 comprises at least one base plate 24 and at least one wear protection assembly 28 which is attached to the base plate 24 and comprises a support plate 30 and a wear protector attached to the support plate 30, wherein the wear protection assembly 28 is releasably fastened to the base plate 24. 15 -Fig. 3 7509049_1 (GHMatters) P102455.AU ROSHANK r-4)
Description
The invention relates to a grinding track for a comminution installation, in particular for a hammer mill or a vertical mill, and to a comminution installation having such a 5 grinding track.
Comminution installations such as, for example, hammer mills or vertical mills, are usually employed for comminuting rocks, the former having a grinding track on which the rocks are comminuted. Such a grinding track comprises a plurality of base plates of 10 steel, which are attached to a support frame and have a wear protector, in particular large-area chromium-carbide armour. Wear arises on the large-area armour during operation of the comminution installation, so that the base plate of the grinding track needs to be replaced. Replacing such a base plate is very cost-intensive and is associated with a high effort in labour. Furthermore, replacing the base plates 15 necessitates a long stoppage of the comminution installation.
Proceeding therefrom, it would be advantageous if the present invention would overcome the above-mentioned disadvantages and to provide a grinding track for a comminution installation which has low wear and at the same time enables cost20 effective maintenance of the grinding track.
According to a first aspect, a grinding track for a comminution installation, in particular a hammer mill or a vertical mill, comprises at least one base plate and at least one wear protection assembly which is attached to the base plate and comprises a support 25 plate and a wear protector attached to the support plate, wherein the wear protection assembly is releasably fastened to the base plate.
For example, a grinding track comprises the grinding track of a hammer mill, wherein the grinding track is stationary and impact hammers which are attached to a rotor are 30 rotatingly moved in relation to the grinding track such that ground stock is comminuted between the impact hammers and the grinding track. A grinding track furthermore comprises a grinding track of a vertical mill, in particular the surface of a grinding plate and/or of a rolling body rolling thereon.
2016201564 18 Jan 2019
A grinding track preferably comprises at least one base plate which is configured in such a manner that said base plate withstands the forces which act on the grinding track during comminution of the ground stock. The base plate has a curved plate shape, for example, so as to configure a cylindrical or semi-tubular grinding track, for 5 example.
A wear protection assembly which is releasably fastened to the base plate offers the advantage that in the event of wear only the wear protection assembly needs to be replaced. Dismantling or replacing the entire base plate is not required. This offers 10 significant savings in cost and time, wherein in addition thereto the weight of the wear assembly is significantly lower than that of the base plate and the former is thus significantly simpler to replace.
The wear protection assembly is preferably fastened to the base plate by means of 15 screws, wherein the support plate is screwed to the base plate. A screw connection enables simple removal of the wear protection assembly from the base plate, without the base plate having to be removed from the grinding track.
The wear protector which is applied to the support plate comprises large-area armour 20 of chromium-carbide, for example.
For example, the wear protection assembly extends across the entire surface of the base plate such that the latter does not come into contact with the stock to be comminuted and is thus not or only to a very minor extent exposed to wear. According 25 to a first embodiment, a plurality of wear protection assemblies are disposed beside one another on the base plate. This implements a modular construction of the grinding track, in particular of the base plate, enabling targeted replacement of those regions with high wear.
According to a further embodiment, the grinding track comprises a plurality of wear protection assemblies of dissimilar size. Preferably, the wear protection assemblies in those regions in which high wear arises are of smaller size than in those regions in which minor wear arises. In this way it is ensured that only the worn-out regions of the grinding track are replaced, on account of which material and costs are saved. A
2016201564 18 Jan 2019 plurality of wear protection assemblies of dissimilar size are preferably disposed on one base plate.
According to a further embodiment, the wear protector comprises a plurality of wear 5 protection elements. This enables replacement or reconditioning of individual worn-out wear protection elements on the support plate.
According to a further embodiment, the wear protection elements are configured in a plate-shaped manner, such that simple manufacturing of the wear protection elements 10 is possible. The plate-shaped wear protection elements are preferably disposed in rows beside one another on the support plate in such a manner that the surface of the support plate that faces away from the base plate is entirely covered by the plateshaped wear protection elements, such that additional wear protection of the support plate may be dispensed with. For example, a further wear protection layer having, for 15 example, chromium carbide or fused tungsten carbide may be applied to the surface of the wear protection elements.
According to a further embodiment, the wear protection elements are configured in a pin-shaped manner. This assists the grinding effect of the grinding track and enables 20 the configuration of an autogenous wear layer between adjacent pins. Preferably, the support plate is provided with an additional wear protector, such as a chromium carbide layer, for example, such that wear between adjacent pins is minimized.
According to a further embodiment, the wear protection elements are configured from a 25 hard metal. Hard metal, such as sintered tungsten carbide in a cobalt matrix, for example, has high wear resistance and temperature resistance. This enables the grinding track to be employed for grinding hot ground stock, such as ores, for example, which prior or during grinding has to be dried by a hot-gas stream. In particular, the wear protection elements have a temperature resistance of 500°C to 1000°C.
According to a further embodiment, the wear protection elements are equipped with a built-up weld. In particular, the wear protection elements of hard metal on the surface thereof have a built-up weld, such that additional wear protection is achieved.
2016201564 18 Jan 2019
It is furthermore conceivable that the wear protection elements are configured from rubber and/or polyurethane and/or polyethylene and/or ceramics, for example.
According to a further embodiment, the wear protection elements are attached to the 5 support plate by means of soldering/brazing, screwing or adhesive bonding.
Preferably, the plate-shaped wear protection elements are fastened to the support plate by means of a solder. This offers the advantage of rapid and simple fastening of the wear protection elements to the support plate. Soldering/brazing the wear protection elements to the support plate and not to the base plate additionally prevents 10 warping of the base plate by the high temperatures which are applied during soldering/brazing. Preferably, the pin-shaped wear protection elements are clamped, screwed, adhesively bonded, or welded to the support plate.
According to a further embodiment, the support plate is a substantially planar plate. 15 Any curvature of the base plate is equalized by the angular mutual disposal of the wear protection assemblies, such that any curvature in the individual wear protection assemblies may be dispensed with. This additionally simplifies manufacturing of the wear protection assemblies. Furthermore, a planar support plate simplifies attaching the wear protector, in particular the wear protection elements, to the surface of the 20 support plate. It is likewise conceivable for the support plate to be configured in a curved manner, in particular in such a manner that the curvature of the support plate corresponds to the curvature of the base plate to which the former is attached.
According to a further embodiment, the support plate is configured from steel, in 25 particular from heat-resistant steel. The support plate preferably comprises non-alloyed construction steel or high temperature-resistant steel. Temperature-resistant steel types are, for example, austenitic chromium-nickel steel types. High temperatureresistant steel types up to 600°C are steel types according to DIN EN 10213, for example. High temperature-resistant steel types up to 1200°C are steel types 30 according to DIN EN 10295, for example. The configuration of the support plate from a high temperature-resistant steel enables the grinding track to be employed for grinding hot stock, for example as in the comminution of nickel ores.
Furthermore, the invention comprises a comminution installation, in particular a 35 hammer mill or a vertical mill, having a plurality of grinding elements and a grinding
2016201564 18 Jan 2019 track as described above. A grinding element comprises an impact hammer of a hammer mill or a rolling body of a vertical mill, for example.
Description of the drawings
The invention is explained in more detail hereunder by means of a plurality of exemplary embodiments with reference to the appended figures, in which:
Fig. 1 shows a schematic illustration of a hammer mill having a grinding track according to one exemplary embodiment.
Fig. 2 shows a schematic illustration of a grinding track according to Fig. 1, having a plurality of base plates, in a perspective view, according to one exemplary 15 embodiment.
Fig. 3 shows a schematic illustration of a fragment of a grinding track having a base plate and a wear protection assembly, according to one exemplary embodiment.
Fig. 4 shows a schematic illustration of a wear protection assembly according to Fig. 3.
Fig. 5 shows a schematic illustration of a base plate having a plurality of wear protection assemblies, in a perspective front view, according to one exemplary 25 embodiment.
Fig. 6 shows a schematic illustration of a base plate having a plurality of wear protection assemblies, in a perspective rear view, according to the exemplary embodiment as per Fig.5.
Fig. 1 shows a hammer mill 12 having a stock inlet 12, a stock outlet 14, and a grinding track 16, configuring a substantially U-shaped housing. A rotor 18 which is attached so as to be rotatable about an axle 22 is disposed below the stock inlet 12 and the stock outlet 14. Impact hammers 20 which are circumferentially spaced apart in a uniform
2016201564 18 Jan 2019 manner and which point radially outward are disposed on the rotor 18. In an exemplary manner, ten impact hammers are attached to the rotor 18 in Fig. 1.
The grinding track 16 extends from the stock inlet 12 towards the stock outlet 14, and has a first upper and substantially funnel-shaped region into which the stock inlet 12 opens and from which the stock outlet 14 exits. A substantially semi-tubular region which surrounds the lower half of the rotor 18 adjoins the funnel-shaped region. A grinding gap which narrows from the stock inlet 12 in the direction of the central area up to the symmetry plane of the grinding track and subsequently widens in the 10 direction of the stock outlet 14 is configured between the grinding track 16 and the impact hammers 20.
During operation of the hammer mill 10, stock to be comminuted, such as rocks, for example, is loaded into the stock inlet 12 and on account of gravity falls laterally onto 15 the rotor 18 of the hammer mill 10. Movement of the stock to be comminuted is assisted by the rotation of the rotor 18 in the direction of the arrow and/or by a blower (not illustrated). The impact hammers 20 which are attached to the external circumference of the rotor 18, by way of relative movement between the impact hammers 20 and the grinding track 16, comminute the stock. The comminuted stock 20 leaves the hammer mill 10 by way of the stock outlet 14.
Fig. 2 shows a grinding track 16 according to the grinding track 16 illustrated in the hammer mill 10 of fig. 1. The grinding track has a plurality of base plates 24 disposed in rows. The base plates 24 are attached to a structure which is not illustrated in Fig. 2, 25 for example.
The grinding track 16 has the geometry described with reference to Fig. 1, wherein in an exemplary manner nineteen rows running in the axial direction, having in each case six base plates, are disposed. The base plates 24 have a rectangular, in particular 30 square shape, and are arched in such a manner that when mutually disposed they configure the above-described shape of the grinding track.
Fig. 3 shows a fragment of the grinding track 16, having two base plates disposed beside one another, wherein only one of the base plates is completely illustrated, The 35 base plate 24 has a concave curvature and a plurality of bores 26 running through the
2016201564 18 Jan 2019 base plate. In an exemplary manner, six parallel rows of in each case eight bores are configured in the base plate 24 in Fig. 3. The base plate 24 furthermore has a wear protection assembly 28 which is illustrated in more detail in Fig. 4. The wear protection assembly 28 has a rectangular support plate 30, a plurality of wear protection elements 5 32 arranged in rows being attached to the surface of said support plate 30. In an exemplary manner, three rows of in each case seven wear protection elements 32 are disposed in Figs. 3 and 4. For example, the wear protection elements 32 have a rectangular plate shape and are attached to the surface of the support plate 30 by means of soldering/brazing or adhesive bonding, for example.
Fig. 4 furthermore shows a plurality of screws 34 which are provided for fastening the support plate 30 to the base plate 24. In an exemplary manner, each support plate 30 is attached to the base plate 24 by means of three screws.
Fig. 5 shows a base plate 24 to which a plurality of wear protection assemblies 28 are attached in such a manner that the surface of the base plate is completely covered by wear protection assemblies 28, such that during operation of the hammer mill 10 the base plate 24 does not come into contact with the stock to be comminuted. In an exemplary manner, sixteen wear protection assemblies 28 in two rows having in each case eight wear protection assemblies 28 are attached to the base plate 24.
Fig. 6 shows the rear side of the base plate 24 illustrated in Fig. 5, having the wear protection assemblies 28 which are attached to the base plate 24 by in each case three screws 34.
The support plates 30 are configured from steel, for example, in particular from heatresistant steel. The wear protection elements 32 are configured from a hard metal, in particular tungsten carbide in a cobalt matrix.
The construction of the grinding track 16 of a hammer mill 10, as has been described with reference to Figs. 1 to 6, offers the advantage that the wear protection assemblies 28 are releasably attached to the base plates 24 and in the event of wear on the surface are thus removable in a simple and rapid manner. By way of the abovedescribed grinding track 16 it is possible for only the heavily worn-out regions of the grinding track 16 to be replaced in a targeted manner, since the wear surface of the
2016201564 18 Jan 2019 grinding track 16 is subdivided into a plurality of wear protection assemblies 28 and is thus replaceable in segments. Disposing a plurality of wear protection assemblies 28 on the base plate 24 of the grinding track 16 furthermore offers the advantage that the individual wear protection assemblies 28 are of identical construction and are thus 5 readily manufacturable. Furthermore, the wear protection assemblies 28 preferably have a planar support plate 30 to which the wear protection elements 32 are attached.
The curvature of the base plate is equalized by the angular mutual disposal of the wear protection assemblies 28, such that any curvature in the individual wear protection assemblies 28 may be dispensed with. This additionally simplifies manufacturing of the 10 wear protection assemblies 28.
In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is 15 used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
It is to be understood that, if any prior art publication is referred to herein, such 20 reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.
2016201564 18 Jan 2019
List of reference signs
Hammer mill
Stock inlet
14 Stock outlet
Grinding track
Rotor
Impact hammer
Axle
24 Base plate
Bore
Wear protection assembly
Support plate
Wear protection element
34 Screws
2016201564 18 Jan 2019
Claims (10)
1. Grinding track for a comminution installation, in particular a hammer mill or a vertical mill, having
5 at least one base plate, and at least one wear protection assembly which is attached to the base plate and comprises a support plate and a wear protector attached to the support plate, wherein the wear protection assembly is releasably fastened to the base plate,
10 wherein the wear protector comprises a plurality of wear protection elements configured from hard metal and wherein the plate-shaped wear protection elements are disposed in rows beside one another on the support plate in such a manner that the surface of the support plate that faces away from the base plate is 15 entirely covered by the plate-shaped wear protection elements.
2. Grinding track according to Claim 1, wherein a plurality of wear protection assemblies is disposed on the base plate.
20
3. Grinding track according to one of the preceding claims, wherein the grinding track comprises a plurality of wear protection assemblies of dissimilar size.
4. Grinding track according to Claim 3, wherein the wear protection elements are configured in a plate-shaped manner.
5. Grinding track according to Claim 4, wherein the wear protection elements are configured in a pin-shaped manner.
6. Grinding track according to any one of any one of the preceding claims, wherein
30 the wear protection elements have an overlay weld.
7. Grinding track according to any one of the preceding claims wherein the wear protection elements are attached to the support plate by means of
35 soldering/brazing, screwing or adhesive bonding.
2016201564 18 Jan 2019
8. Grinding track according to any one of the preceding claims, wherein the support plate is a substantially planar plate.
5
9. Grinding track according to one of the preceding claims, wherein the support plate is configured from steel, in particular from heat-resistant steel.
10. Comminution installation, in particular a hammer mill or a vertical mill, having a plurality of grinding elements and a grinding track according to any one of the 10 preceding claims.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015205011.4A DE102015205011A1 (en) | 2015-03-19 | 2015-03-19 | Grinding track for a shredding device |
| DE102015205011.4 | 2015-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2016201564A1 AU2016201564A1 (en) | 2016-10-06 |
| AU2016201564B2 true AU2016201564B2 (en) | 2019-03-07 |
Family
ID=56852824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2016201564A Ceased AU2016201564B2 (en) | 2015-03-19 | 2016-03-10 | Grinding track for a comminution installation |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU2016201564B2 (en) |
| BR (1) | BR102016005147A2 (en) |
| DE (1) | DE102015205011A1 (en) |
| FR (1) | FR3033717A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678530A (en) * | 1984-07-02 | 1987-07-07 | The B. F. Goodrich Company | Method of making liner sections for rotary pulverizers |
| DE10047095A1 (en) * | 2000-09-21 | 2002-04-18 | Verschleis Technik Dr Ing Hans | Wear plate for machine surfaces is held in place by bolt whose head stands clear of protective layer in plate fixing sector offset from protective layer. |
| US7744028B2 (en) * | 2005-12-09 | 2010-06-29 | Swissrtec Gmbh | Stator for an impact crusher |
| DE102011051744A1 (en) * | 2011-07-11 | 2013-01-17 | Betek Gmbh & Co. Kg | Acceleration tool and spin profile for a rotary impact crusher |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3722066A1 (en) * | 1987-07-03 | 1989-01-12 | Valentin Gotic | Pinned disc mill |
| JP5048965B2 (en) * | 2006-04-19 | 2012-10-17 | 新日本製鐵株式会社 | Hammer head |
-
2015
- 2015-03-19 DE DE102015205011.4A patent/DE102015205011A1/en not_active Ceased
-
2016
- 2016-03-08 BR BR102016005147A patent/BR102016005147A2/en active Search and Examination
- 2016-03-10 AU AU2016201564A patent/AU2016201564B2/en not_active Ceased
- 2016-03-18 FR FR1652295A patent/FR3033717A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4678530A (en) * | 1984-07-02 | 1987-07-07 | The B. F. Goodrich Company | Method of making liner sections for rotary pulverizers |
| DE10047095A1 (en) * | 2000-09-21 | 2002-04-18 | Verschleis Technik Dr Ing Hans | Wear plate for machine surfaces is held in place by bolt whose head stands clear of protective layer in plate fixing sector offset from protective layer. |
| US7744028B2 (en) * | 2005-12-09 | 2010-06-29 | Swissrtec Gmbh | Stator for an impact crusher |
| DE102011051744A1 (en) * | 2011-07-11 | 2013-01-17 | Betek Gmbh & Co. Kg | Acceleration tool and spin profile for a rotary impact crusher |
Also Published As
| Publication number | Publication date |
|---|---|
| BR102016005147A2 (en) | 2016-10-25 |
| FR3033717A1 (en) | 2016-09-23 |
| AU2016201564A1 (en) | 2016-10-06 |
| DE102015205011A1 (en) | 2016-09-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |