EP2925451A1 - Impact screen for an impact crusher, impact crusher provided with said impact screen, and crushing facility - Google Patents
Impact screen for an impact crusher, impact crusher provided with said impact screen, and crushing facilityInfo
- Publication number
- EP2925451A1 EP2925451A1 EP13801671.2A EP13801671A EP2925451A1 EP 2925451 A1 EP2925451 A1 EP 2925451A1 EP 13801671 A EP13801671 A EP 13801671A EP 2925451 A1 EP2925451 A1 EP 2925451A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impact
- screen
- shock
- removable
- fixed
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000035939 shock Effects 0.000 claims description 65
- 238000000227 grinding Methods 0.000 claims description 23
- 238000009527 percussion Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 description 8
- 239000008187 granular material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002245 particle 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
- B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
- B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
- B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
- B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
-
- 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
Definitions
- the present invention relates to a shock shield for horizontal rotor percussion mills, in particular for use in quarries or mines for the dimensional reduction of aggregates or ores.
- the impact crushers comprise a grinding chamber containing a horizontal rotor which is provided with strikers regularly arranged on its periphery, and at least one shock shield which at its upper end has a first hinge for pivotally connecting it to the frame of the mill.
- the shock screen comprises near its lower end a second hinge for connecting the screen to adjustment means comprising an adjusting jack for moving the bottom end of the screen towards or away from the rotor, in particular to define, between the lower end of the lower shock screen and the free end of the strikers, a gap R (see Figure 1) which determines a given grain size.
- the aggregates are introduced through a feed opening and are struck by the strikers secured to the rotor and projected against the shock screen or screens to see their reduced dimensions. Once introduced, the aggregates undergo this process several times until they reach the size of the adjustment gap R between the end of the strikers and the lower end of the last shock screen before the output of the aggregates. Once this dimension is reached, the reduced granulate passes between the strikers and the screen and is evacuated towards the exit.
- the impact crushers comprise at least one impact screen and in general at least two shock screens.
- a first shock screen is disposed behind the rotor and shifted upwardly to define the R difference mentioned above.
- the second shock screen is disposed higher above the rotor, and forms an angle relative to the first shock screen.
- the strikers are wear parts made of a high wear-resistant material and they must be regularly replaced when the effective extension of their ends becomes too small relative to the surface of the rotor.
- shielding bodies made of high-grade material. wear resistance.
- These shielding bodies are elongated bodies fixed horizontally one after the other on this front face. They can be variable in number depending on the size of the shock screen and are fixed on this front face of the shock screen using fastening means to detach them from the shock screen to be replaced when they are too worn for proper use.
- each shielding body is important, which makes the operation risky. These operations inevitably take a long time, especially when we change the set of armor bodies. Of course, the mill must be completely stopped during all this time and produces nothing during this replacement operation of the shielding body.
- An object of the invention is to overcome the disadvantages associated with the assembly and disassembly operations of the shielding bodies by providing a shock screen that facilitates the replacement operations of the shielding body, allowing to significantly reduce the time required for these operations, which therefore greatly reduces the downtime of the mill.
- An object of the invention is a shock shield for a horizontal rotor impact mill, having at one end a first hinge for connecting the shock shield pivotally to a frame of the impact mill, and close to a low end a second joint for connecting the shock shield to adjustment means adapted to rotate the shock shield, the shock shield carrying a plurality of shielding bodies of a wear-resistant material, said armor body being fixed on the shock shield by means of fastening means for detaching them from the shock shield with a view to their replacement, characterized in that said shock shield is composed of a fixed part connected to the frame, and a removable portion carrying said shielding body and for simultaneously removing all the shielding bodies attached thereto, out of said grinding chamber.
- said removable portion of the shock shield is formed by a support plate provided with holes for fixing the shielding bodies;
- said removable portion of the impact screen comprises at one of its ends first connection means and at its opposite end second connection means with said fixed part of the impact screen;
- said first connecting means comprise hook elements adapted to cooperate with a horizontal rod provided at one of the ends of said fixed part so as to allow said removable part to swing to approach it when the assembling said removable portion to said fixed portion and moving away therefrom upon removal of said removable portion;
- said second connecting means comprise fixing screws able to pass through first fixing holes provided at one end of said removable part and second fixing holes provided at one end of said fixed part, said first and second fixing holes being alignable on each other when said removable portion is joined to said fixed portion;
- each impact screen comprises two removable parts juxtaposed on said fixed part of the shock screen; - said removable portion is at an upper end provided with lifting eyes; and
- said first connecting means of said removable portion are disposed at the lower end thereof, and said second connecting means are arranged at the upper end thereof.
- Another object of the invention is to provide a horizontal rotor percussion mill, comprising a frame defining a grinding chamber containing a rotor provided with strikers regularly arranged on its periphery, and at least one shock screen which on its front face directed towards the rotor carries several shielding bodies made of a material with high wear resistance, characterized in that the said at least one impact screen is a shock screen in a fixed part and a moving part having the characteristics defined above. above.
- Yet another object of the invention is to propose a grinding plant comprising a plurality of impact crushers according to the invention.
- the impact crushers of the grinding plant are often placed at a certain height of the ground level in a place difficult to access.
- the grinding installation according to the invention may be stationary or mobile, and in the latter case mounted movable on wheels or caterpillars.
- FIG. 1 is a side view in section showing a hammer mill provided with two impact screens according to the invention
- FIG. 2 is a perspective view showing a shock screen according to the invention comprising a fixed part and two removable parts, one of which is being removed;
- FIG. 3 is a side view showing the removable part connected to the fixed part of the shock screen and, in phantom, released and tilted from the fixed part to be removed;
- FIG. 4 is a side view of the removable portion of the shock shield
- FIG. 5 is a perspective view showing the removable portion of the impact screen in a horizontal position for the change of the shielding bodies
- FIG. 6 is a side view, partially broken away, showing a section of the tilting and tilting mounted mill frame for lifting the removable portion of a first impact screen;
- FIG. 7 is a side view, partially broken away, showing two sections of the mill frame mounted tilting and tilted together for lifting the removable portion of a second impact screen;
- FIG. 8 shows a schematic view of an installation according to the invention mounted mobile.
- FIG. 1 shows an overview of a hammer mill 1 according to the invention. It comprises a frame 2 defining a grinding chamber 3 provided with an opening 4 of receiving aggregates or ores (not shown) which slide on a feed plate inclined inwardly of the grinding chamber.
- the grinding chamber 3 contains a horizontal rotor 6 bearing strikers 7, here four in number, regularly disposed on its periphery.
- the rotor 6 is mounted integral with a rotation shaft 8 driven by an electric motor, hydraulic or other (not shown).
- a first and a second impact screen 9, 10 are arranged in the grinding chamber, the first (9) practically behind the rotor 6 being shifted upwards, and the second ( 10) substantially above the rotor 6 being shifted slightly backwards.
- the shock shields 9, 10 have at their upper end a respective first hinge 11, 12 comprising a pivot so as to be pivotable about it, and near their respective lower end a second hinge 11 ', 12' connecting the shock screen to adjustment means comprising adjustment cylinders 13 respectively 14 for moving the free end closer to or away from the respective screen of the rotor 6.
- the grain size to be obtained for the material to be ground is adjusted by moving the low end of the first screen 9, which is the lowest, of the periphery of the rotor as close as possible or away from it to obtain a distance R thanks to which the granulate can pass after reaching the adjustment dimension determined by this difference.
- Each impact screen 9, 10 carries on its front face 15 directed towards the rotor 6 several elongated shielding bodies 16 fixed horizontally one after the other on this front face 15.
- the shielding bodies are made of a material with high wear resistance and they are fixed on the respective impact screen 9, 10 by means of fastening means enabling them to be detached from the shock screens for replacement.
- these means for fixing the shielding bodies comprise screws 17 (see FIGS. 3 to 5) extending through through holes 18 and 19 made in the shielding bodies 16 respectively in the impact shields 9, 10 and aligned with each other to allow the screws 17 to cooperate with nuts 20 disposed at the rear face of the shock shields.
- the screws can be screwed directly into tapped holes (not shown) made in the impact shields instead of the through holes 19 in the impact shields 9, 10.
- each impact screen 9, 10 is composed of a fixed part 21 connected to the frame 2, and a removable part 22 carrying the shielding bodies 16.
- the fixed part 21 is connected to the frame 2 by the first hinge 11, 12 and even if it can pivot, it is fixed in the sense that it is not removable, that is to say, it remains normally permanently attached to the frame 2.
- the fixed portion 21 of the shock screens 9, 10 is composed of elongated elements 23 which intersect so as to form a perforated structure.
- the removable portion 22 of the shock shields 9, 10 comprises a rectangular support plate 25 provided with through holes 19 for fixing the shielding bodies 16.
- the removable part 22 of the shock shields 9, 10 thus makes it possible to simultaneously remove all the shielding bodies 16 from the grinding chamber 3, while leaving the fixed part 21 in place in the grinding chamber 3.
- the removable portion 22 of the shock shields 9, 10 To connect the removable portion 22 of the shock shields 9, 10 to the fixed portion 21 thereof, the removable portion 22 has at one of its ends first connecting means, and at its opposite end second means of link.
- the first connecting means comprise hook members 26 adapted to cooperate with an axis defined by a horizontal rod 27 provided at one end of the fixed portion 21 of the shock screens 9, 10.
- the hook elements 26 of the removable part 22 thus form with the horizontal rod 27 of the fixed part 21 a hinge about which the removable part 22 can swing to a position assembly with the fixed portion 21 to be connected thereto by the second connecting means.
- These second connecting means of the removable part 22 to the fixed part 21 comprise fixing screws 28 able to pass through first fixing holes 29 provided in a fixing plate 30 at one end of the removable part 22 and second fixing holes 31 provided in a fixing plate 32 at one end of the fixed part 21.
- the first connecting means comprising the hook elements 26 are preferably arranged at the lower end of the removable portion 22 and the second connecting means comprising the fixing screws 28 and the first and second fixing holes 29, 31 are arranged at the upper end of the removable portion 22 to ensure the best accessibility to the screws, as shown in the figures.
- first and second connecting means of the removable portion 22 to the fixed portion 21 of the shock screens 9, 10 can be reversed, that is to say that the first connecting means comprising the hook elements 26 are arranged at the upper end of the removable part 22 and the second connecting means comprising the fixing screws 28 and the first and second fixing holes 29, 31 are arranged at the lower end of the removable part 22.
- the horizontal rod 27 which in the illustrated example is disposed at the bottom of the fixed portion 21 is of course arranged at the top of the fixed part.
- this removable portion has at its upper end lifting eyelets 33 can receive the hooks (not shown) of a lifting device 34 provided with a bracket adapted to the mill. Otherwise, the removable portion can be lifted using any other fixed lifting means such as a crane or removable crane such as a crane.
- the frame 2 of the mill 1 comprises a fixed frame section 2 'and at least one section 2 "upwardly mounted frame for opening the grinding chamber 3 upwardly (see FIG. 6) With this arrangement, the removable part 22 of the first shock screen 9 can be raised substantially vertically and transposed for the change of the shielding 16.
- the mill frame advantageously comprises a third frame section 2 "'which is pivotally mounted with the frame section 2 "(see Figure 7).
- the removable portion 22 of the shock shields 9, 10 can easily be removed by simultaneously removing all the shielding bodies 16 fixed on the support plate 25 out of the grinding chamber.
- the detachable part 22 of the shock screen 9, 10 is preferably transferred to a workshop which offers a more favorable environment for disassembly of the shielding bodies 16.
- the removable part 22 is preferably arranged in a horizontal position (see Figure 5) on trestles, for example. As a result, the intervention time is substantially reduced.
- the stopping time of the mill may be limited to the replacement time of a removable portion 22 in whole if a new removable portion with new shielding blocks 16 is prepared in advance, which is the optimal solution .
- the horizontal shaft impact crusher according to the invention comprises at least one shock screen composed of a fixed part connected to the frame 2 and of a movable part carrying the shielding bodies 16.
- the grinding installation according to the invention comprises at least one and preferably several horizontal shaft impact mills 1 comprising at least one shock screen composed of a fixed part connected to the frame 2 and a moving part carrying the bodies. shielding 16.
- the installation can be stationary or mobile and in the latter case, the impact crushers according to the invention are mounted displaceable on wheels, possibly along rails, or on tracks.
- FIG 8 shows a percussion mill 1 forming part of an installation according to the invention.
- This impact mill 1 is on one side associated with a feed device 35 and on the other, via transmission means 36, associated with a rotary drive device 37 of the rotor of the impact mill.
- This rotary drive device may consist of an electric motor and / or diesel.
- a conveyor 38 is disposed downstream of the impact mill for discharging the milled material.
- FIG. 5 shows that this installation is made mobile by being mounted on tracks 39.
- the invention is not limited to the examples illustrated and described, and the skilled person will be able to find variants without departing from the scope of the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
- Crushing And Grinding (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13801671T PL2925451T3 (en) | 2012-11-29 | 2013-11-15 | Impact screen for an impact crusher, impact crusher provided with said impact screen, and crushing facility |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1261390A FR2998489B1 (en) | 2012-11-29 | 2012-11-29 | SHOCK SCREEN FOR PERCUSSION MILL, PERCUSSION MILL WITH SHOCK SCREEN, AND MILLING MACHINE |
PCT/FR2013/052752 WO2014083257A1 (en) | 2012-11-29 | 2013-11-15 | Impact screen for an impact crusher, impact crusher provided with said impact screen, and crushing facility |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2925451A1 true EP2925451A1 (en) | 2015-10-07 |
EP2925451B1 EP2925451B1 (en) | 2016-11-02 |
Family
ID=47833201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13801671.2A Active EP2925451B1 (en) | 2012-11-29 | 2013-11-15 | Impact screen for an impact crusher, impact crusher provided with said impact screen, and crushing facility |
Country Status (10)
Country | Link |
---|---|
US (1) | US9849459B2 (en) |
EP (1) | EP2925451B1 (en) |
CN (1) | CN104853846B (en) |
CA (1) | CA2890622C (en) |
ES (1) | ES2611350T3 (en) |
FR (1) | FR2998489B1 (en) |
MX (1) | MX358823B (en) |
PL (1) | PL2925451T3 (en) |
PT (1) | PT2925451T (en) |
WO (1) | WO2014083257A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10596576B2 (en) * | 2015-02-18 | 2020-03-24 | Kolberg-Pioneer, Inc. | Apparatus and method for an apron assembly |
US10562081B2 (en) * | 2015-10-08 | 2020-02-18 | Pneumat Systems, Inc. | Counter-rotational dual whip-head device for fragmenting solidified bulk materials in containment vessels |
KR101762197B1 (en) * | 2016-08-19 | 2017-07-27 | 주식회사 하나그린 | Aggregate crusher of Construction Wastes |
CN106861875B (en) * | 2017-03-21 | 2019-02-05 | 中化弘润石油化工有限公司 | A kind of petroleum coke efficiency crushing device |
US11602756B2 (en) * | 2019-03-21 | 2023-03-14 | Terex Usa, Llc | System and method for replacing a rotor in a machine for grinding and chipping |
CN110756278A (en) * | 2019-11-07 | 2020-02-07 | 安徽瑞智福瑶环保科技有限公司 | Multidimensional crushing device for solid waste |
EP4173764A1 (en) * | 2021-10-28 | 2023-05-03 | Comes Maschinen- und Apparatebau GmbH | Horizontal schredder assembly with manipulator |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH351555A (en) * | 1955-12-01 | 1961-01-31 | Hazemag Hartzerkleinerung | Process for comminuting and slurrying chalk and similar substances and apparatus for carrying out this process |
US3531055A (en) * | 1967-11-01 | 1970-09-29 | Gunter Alt | Hammer crusher |
AT354831B (en) * | 1978-05-12 | 1980-01-25 | Voest Ag | IMPACT MILL FOR THE CRUSHING OF STONE OR THE LIKE. |
US5255869A (en) * | 1992-10-26 | 1993-10-26 | Smith Roger G | Impact crusher with biased tertiary curtain assembly |
DE4343406C1 (en) | 1993-12-18 | 1994-12-08 | Noell Serv & Maschtechn Gmbh | Impact crusher with pivotable grinding track |
DE4440076C1 (en) * | 1994-11-10 | 1996-04-04 | Noell Serv & Maschtechn Gmbh | Impact crusher with hydraulic adjustment of the grinding gap that determines the degree of comminution |
CN2208977Y (en) | 1994-12-22 | 1995-10-04 | 杨柯 | Ring hammer counter type fine grain crusher |
DE20002663U1 (en) | 2000-02-14 | 2000-03-30 | Krupp Fördertechnik GmbH, 45143 Essen | Impact crusher |
CN201189478Y (en) | 2008-04-17 | 2009-02-04 | 上海建设路桥机械设备有限公司 | Impact breaker with safety function |
FR2970882B1 (en) * | 2011-01-31 | 2013-01-18 | Metso Minerals France Sa | PERCUSSION MILL WITH ROTOR POSITIONING DEVICE. |
CN102671745B (en) * | 2012-05-07 | 2014-06-18 | 四川川润环保能源科技有限公司 | Urban garbage bag-breaking crushing device with knife cleaning function |
-
2012
- 2012-11-29 FR FR1261390A patent/FR2998489B1/en not_active Expired - Fee Related
-
2013
- 2013-11-15 EP EP13801671.2A patent/EP2925451B1/en active Active
- 2013-11-15 PL PL13801671T patent/PL2925451T3/en unknown
- 2013-11-15 ES ES13801671.2T patent/ES2611350T3/en active Active
- 2013-11-15 CA CA2890622A patent/CA2890622C/en active Active
- 2013-11-15 PT PT138016712T patent/PT2925451T/en unknown
- 2013-11-15 MX MX2015006291A patent/MX358823B/en active IP Right Grant
- 2013-11-15 WO PCT/FR2013/052752 patent/WO2014083257A1/en active Application Filing
- 2013-11-15 US US14/648,107 patent/US9849459B2/en active Active
- 2013-11-15 CN CN201380062621.6A patent/CN104853846B/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014083257A1 * |
Also Published As
Publication number | Publication date |
---|---|
MX2015006291A (en) | 2015-08-07 |
PT2925451T (en) | 2017-01-06 |
ES2611350T3 (en) | 2017-05-08 |
FR2998489B1 (en) | 2014-12-26 |
CA2890622C (en) | 2020-08-11 |
FR2998489A1 (en) | 2014-05-30 |
EP2925451B1 (en) | 2016-11-02 |
CN104853846A (en) | 2015-08-19 |
PL2925451T3 (en) | 2017-07-31 |
MX358823B (en) | 2018-09-05 |
US20150298132A1 (en) | 2015-10-22 |
CN104853846B (en) | 2017-03-08 |
WO2014083257A1 (en) | 2014-06-05 |
US9849459B2 (en) | 2017-12-26 |
CA2890622A1 (en) | 2014-06-05 |
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