Feeding station of crusher

Abstract

A crusher feed station (20) mountable on a crusher main frame (30) to receive bulk material from a feed hopper (80) and a primary feeder (90) also mounted on the main frame (30), the crusher feed station (20) having a coarse screen table (100) and a classifying screen (110) in which the coarse screen table (100) and the classifying screen (110) are mounted, the classifying screen (110) is configured to produce a first classifying screen oversize product, a second fine grain product, and a third intermediate size product. The invention also extends to a crusher (10) comprising said crusher feed station (20) and to a method of feeding feed material from a feed station (20) to a crusher (10).

Description

Technical Field

[0001] The invention relates to a crusher feeding station and a crusher comprising the feeding station. Background Art

[0002] A variety of different crushers have been developed for processing bulk materials such as stone, minerals and domestic and industrial waste including building materials to produce a crushed product for subsequent processing or disposal. Known crushers include cone, impact, vibrating and jaw crushers. Crushers can also be classified as mobile crushers, which are easily transported from one location to another, and static crushers, which are designed for use in large fixed installations that are assembled on site, for example, in a quarry or mine environment, where they remain until the source of raw materials is exhausted.

[0003] The mobile crusher generally has endless tracks or wheels mounted at a track undercarriage of the main chassis of the mobile crusher.

[0004] Typically, a crusher is provided with a feed station for receiving crusher feed bulk material from a hopper and feeding the bulk material to the crusher. Known feed stations consist of a feeder, such as a vibrating pan feeder for receiving bulk material from a hopper, and may include a screening device to remove undersize material, such as natural fines, from the bulk material prior to crushing to prevent clogging in the crusher and to improve crusher performance. The removed material may then be combined with the crushing product and / or processed as a useful commercial by-product of the crushing process, such as natural fines.

[0005] However, known feed stations may be inefficient in removing undersize material from the bulk material and may not be able to produce more than one by-product from the undersize material.

[0006] An object of the present invention is to provide a crusher feed station adapted to efficiently remove undersize material from crusher feed bulk material and to produce more than one by-product from the bulk material. Summary of the invention

[0007] According to the present invention, there is provided a crusher feeding station for feeding feed material into a crusher, the crusher feeding station being configured to produce a sized crushed product, the crusher feeding station comprising: Primary feeder; a scalping deck for removing undersize material from the feed material to form a scalping deck oversize crusher feed and undersize (underflow) sections; and A sizing screen located below the coarse screen deck for sizing the undersize (underflow) fraction, wherein the sizing screen comprises at least three screening decks configured to produce or size or produce and size a first sizing screen oversize product, a second fines product, and a third intermediate size product. A crusher feed station optimizes crusher efficiency by removing a high percentage of undersize material and producing a clean, saleable third intermediate product in addition to the second fines product.

[0008] The feed station may be configured to output each of the first grading screen oversize product, the second fine particle product, and the third intermediate size product as a corresponding finished product.

[0009] The crusher feed station has a general feeding direction along the longitudinal direction of the feed station. In any embodiment, the feed station is configured to feed the coarse screen deck oversize crusher feed and the undersize portion along the feeding direction. Preferably, the undersize portion is fed (i.e., flows) immediately below the oversize crusher feed.

[0010] Each of the at least three screening decks may extend along the feed direction from a respective upstream receiving end to a downstream discharge end of the at least three screening decks.

[0011] In any embodiment, the coarse screen deck oversize crusher feed and undersize feed stream are fed continuously in a feed direction of the feed station.

[0012] In any embodiment, the scalping deck is configured to feed, in operation, crusher feed above the scalping deck screen to the crusher, such as conveying crusher feed above the scalping deck screen to the crusher.

[0013] In any embodiment, the crusher feed station, in particular the coarse screen table, can be configured to separate the oversize crusher feed from the undersize portion in operation. The feed station can be configured so that in operation, the undersize portion falls by gravity to the sizing screen located below the coarse screen table.

[0014] In one embodiment, the first upper stage of the three screening stages comprises a first screening medium, the size of which is set to produce a first grading screen oversize product. Thus, the size of the first grading screen oversize product is set as required according to production requirements.

[0015] Preferably, the size of the first screening medium is set to set the size of the product on the first grading screen according to the sized crushed product. Therefore, the product on the first grading screen can be combined with the sized crushed product without being crushed. Wherein, the term "setting size" as used in this article, such as "the size is set to set the size", can include at least one of distinguishing and distinguishing. For example, the size of the first screening medium can be set to distinguish the product on the first grading screen (from the rest of the undersize part). As used herein, the term "setting size" is intended to refer to the size of the opening of the corresponding screening medium.

[0016] Typically, the oversize product of a screening medium may be a product that is oversized for the screening medium, i.e., a product that cannot pass through the screening medium, e.g., through an opening in the screening medium. Thus, different screening media may "size the product" based on the respective oversizing of the different screening media. For the term "produce" as used herein, e.g., "a screening table or screening medium is configured to produce", generally refers to the ability of the screening table or screening medium to distinguish and capture material of a relevant size to output such material.

[0017] In one embodiment, the first upper stage and the second lower stage and the third lower stage of the three screening stages include screening media, the size of which is set to produce a second fine grain product as an output product. Therefore, the second fine grain product does not enter the crusher and can be regarded as a graded finished product. The output product can have a particle size that can pass through the corresponding screening media of the first stage, the second stage and the third stage.

[0018] Suitably, the second and third lower stages include screening media sized to produce a third intermediate size product as the second and third lower stage oversize product. Such oversize product thus results in additional saleable product.

[0019] Suitably, the second lower stage screening medium is different from the first stage screening medium, and the second lower stage screening medium may be configured to be sized for different products. For example, the openings of the first stage screening medium may be larger than the openings of the second lower stage screening medium (if a second lower stage screening medium is present).

[0020] In any embodiment, the crusher feed station further comprises a third intermediate size product conveyor for conveying the third intermediate product from the crusher feed station. The third intermediate size product conveyor can remove the third intermediate size product from the crusher feed station for bagging or the like.

[0021] In any embodiment, the crusher feed station further comprises a fines product conveyor for conveying fines product from the crusher feed station. The fines product conveyor removes fines product from the crusher feed station for bagging or the like.

[0022] In any embodiment, the sizing screen comprises a vibrating sizing screen. The vibrating screen is effective to screen the underflow fraction.

[0023] In any embodiment, the primary feeder comprises a vibratory pan feeder.The vibratory pan feeder is effective to feed feed material to the coarse screen table.

[0024] The undersize portion may form a first underflow which vertically descends from the oversize crusher feed to a first sizing screen.

[0025] The first grading screen may be configured to remove the first grading screen overscreen product to form a second underflow vertically descending from the first grading screen to the second lower stage 130 , particularly the second lower stage screening medium 160 .

[0026] The second lower stage 130, and in particular the screening media 160 of the second lower stage 130, may be configured to remove intermediate-sized products from the second underflow product as an oversize product of the second stage (i.e., the second lower stage screening media) to form a third underflow that vertically descends to the screening media 170 of the third lower stage 140.

[0027] In any embodiment, the primary feeder may be configured to convey the feed material along a feeding direction of the feed station.The primary feeder may be configured to convey the feed material in a substantially horizontal direction.

[0028] In any embodiment, the coarse screen stage may border the primary feeder.

[0029] In any embodiment, the primary feeder 90 can be disposed in the feed hopper 80. The primary feeder 90 can extend from the feed hopper toward the coarse screen deck 100. The coarse screen deck 100 can be positioned immediately above the grading screen 110.

[0030] In any embodiment, the oversize crusher feed is fed through the coarse screen table along the feed direction of the feed station.

[0031] In any embodiment, the first underflow is fed along a feeding direction of the feed station over the entire longitudinal extension of the feed station.

[0032] In any embodiment, the second underflow is fed along a feed direction of the feed station.

[0033] In any embodiments, the third screening deck includes a discharge end adjacent to the fine product conveyor 190. Thus, the fine product conveyor can be configured to receive product from the discharge end of the third screening deck.

[0034] In any embodiment, the second station includes a discharge end adjacent to, and preferably immediately above, the third intermediate-size product conveyor 180 for conveying the intermediate product away from the feed station as a finished product.

[0035] In any embodiment, a mechanical steering device. The mechanical steering device may be displaceable. The steering device may include a pivotally attached end, such as a hinged end and a displaceable free end. The steering device may be movable between a first steering position and a second position.

[0036] The diverter may be arranged immediately downstream of the intermediate product conveyor in the feed direction. The diverter may be displaced, such as pivoted, for example pivoted relative to the vertical, to obtain a first diverting position. In this diverting position, the diverter may at least partially protrude in a horizontal direction above the intermediate product conveyor, so that the intermediate-sized products are bypassed from the second lower station, for example, to another conveyor, such as a discharge conveyor.

[0037] In any embodiment, the displaceable mechanical diverter is configured to selectively receive material from the first upper table or the second lower table, in particular from the respective discharge ends of the first upper table and the second lower table. This configuration advantageously allows selective bypassing of material, such as the third intermediate product from the second lower table, through the intermediate product conveyor 180. Thus, the third intermediate size product can be mixed with the first grading screen oversize product, or it can be conveyed by the intermediate product conveyor 180. The diverter can be configured in the shape of a pivotable member (such as a plate or hatch) having a receiving end and a discharge end, wherein the receiving end can be between the first upper table and the second lower table, in particular between the respective discharge ends of the first upper table and the second lower table.

[0038] In another embodiment, the invention also extends to a crusher comprising a crusher feed station as defined above. The crusher incorporating the crusher feed station exhibits optimum efficiency, removes a high percentage of undersize material prior to crushing, and produces a clean, saleable third intermediate product in addition to the second fines product.

[0039] In one embodiment, the crusher further comprises a discharge conveyor for conveying the sized crushed product from the crusher, and the discharge conveyor is located below the discharge end of the grading screen to receive the first grading screen on-screen product from the grading screen. Thus, the discharge conveyor conveys the sized crushed product and the first grading screen on-screen product from the crusher.

[0040] In any embodiment, the crusher comprises a jaw crusher, a cone crusher or an impact crusher.

[0041] In another embodiment, the invention also extends to a method of feeding feed material from a feed station to a crusher, the crusher being configured to produce a sized crushed product from the feed material, the method comprising: coarsely screen the feed material on a coarse screen deck at the feed station to form a coarse screen deck over-screen crusher feed and an under-screen (underflow) portion, and The undersize (underflow) fraction at the feed station is screened with a grading screen having at least three screening stations to form a first grading screen oversize product, a second fines product and a third intermediate size product. Thus, the method optimizes crusher efficiency by removing a high percentage of undersize material and producing a clean, saleable third intermediate product in addition to the second fines product.

[0042] In one embodiment, the method further comprises feeding the scalping deck overscreen crusher to the crusher, such as directly to the crusher.

[0043] In one embodiment, the underflow (bottom flow) part is screened by the first upper stage of the three screening stages to produce the first grading screen upper product. Therefore, the size of the first grading screen upper product is set as required according to production requirements.

[0044] In one embodiment, the underflow (bottom flow) portion is screened by the first upper stage and the second lower stage and the third lower stage of the three screening stages to produce a second fine particle product as an output product, and screened by the second lower stage and the third lower stage to produce a third intermediate product as a second lower stage overscreen product and a third lower stage overscreen product. Thus, the method results in the production of two finished products or saleable products at the material feeding stage of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0046] Figure 1 is a perspective view from above and from one side of a crusher provided with a crusher feed station of the present invention, in which the crusher is a mobile primary jaw crusher and the crusher feed station consists of a primary feeder, a coarse screen table and a grading screen with three grading tables;

[0047] Figure 2 yes Figure 1 A side view of a crusher;

[0048] Figure 3 is from Figure 1 and Figure 2an enlarged perspective view of a crusher feed station and associated feed hopper and primary feeder from above and to one side of the crusher feed station and associated feed hopper and primary feeder separated from the crusher to more clearly illustrate the crusher feed station;

[0049] Figure 4 yes Figure 3 side view of a crusher feed station, feed hopper and primary feeder, with the direction of movement of bulk material through the feed station indicated by an arrow, and

[0050] Figure 5 yes Figure 3 and Figure 4 Another enlarged view of the crusher feed station and primary feeder to more clearly show the three screening decks of the sizing screen and the path of the bulk material through the coarse screening deck. DETAILED DESCRIPTION

[0051] Figure 1 and Figure 2 A mobile crusher 10 is shown provided with a crusher feed station 20 of the present invention, in which the mobile crusher 10 is generally composed of a main frame 30 on a chassis 40 provided with wheels 50 and a jaw crusher 60 mounted on the main frame 30 for crushing bulk material to form a crushed primary product which is conveyed from the mobile crusher 10 on a primary product discharge conveyor 70 provided below the jaw crusher 60. As will be explained more fully below, the crusher feed station 20, which may be mounted on the main frame 30 to receive bulk material from a feed hopper 80 and a primary feeder 90 also mounted on the main frame 30, has a coarse screen deck 100 and a grading screen 110 configured to produce a first grading screen oversize product, a second fines product, and a third intermediate size product.

[0052] Figure 3 An enlarged perspective view from above and to one side of a crusher feed station 20 and associated feed hopper 80 and primary feeder 90 is shown, wherein the crusher feed station 20 and associated feed hopper 80 and primary feeder 90 are separated from the mobile crusher 10. As shown, the primary feeder 90 is disposed in the feed hopper 80 and extends from the feed hopper 80 toward a coarse screen deck 100 positioned above a grading screen 110. The coarse screen deck 100 terminates at a coarse screen deck discharge end 105 from which the coarse screen deck oversize feed is fed from the coarse screen deck 100 to a jaw crusher 60 (see also FIG. 1 ) for crushing. Figure 1 and Figure 2 )middle.

[0053] The grading screen 110 is disposed below the coarse screen stage 100 for sieving the underflow (underflow) portion from the coarse screen stage 100, and has a grading screen discharge end 115 for discharging the sieved material from the grading screen 110. The grading screen 110 is a triple stage grading screen 116 having a first upper screening stage 120 disposed immediately below the coarse screen stage 100, a second or middle screening stage 130 disposed below the upper screening stage 120, and a third or lower screening stage 140 disposed below the second screening stage 130.

[0054] In order to produce the first graded screen oversize product, the second fines product and the third intermediate size product, the upper screening table 120 is provided with an upper table screening medium 150, the second screening table 130 is provided with a second table screening medium 160, and the third screening table 140 is provided with a third table screening medium 170. The size of the first table screening medium 150 is set to produce the first graded screen oversize product, for example, based on the sized crushed product. The first upper screening table 120, the second screening table 130 and the third lower screening table 140 have respective screening media 150, 160, 170, the size of which is set to produce the second fines product as the output product. The size of the screening medium 160 of the second screening table 130 and the screening medium 170 of the third lower screening table 140 is also set to produce the third intermediate size product as the oversize product of the second screening table 130 and the third lower screening table 140.

[0055] The crusher feeding station 20 is also provided with a third intermediate size product conveyor 180, which is disposed below the grading screen discharge end 115 of the second screening deck 130 and the third lower screening deck 140 to convey the third intermediate product from the crusher feeding station 20. The longitudinal axis of the third intermediate size product conveyor 180 is disposed substantially perpendicular to the longitudinal axis of the grading screen 110, and a chute 185 is positioned above the third intermediate product conveyor 180 to guide the third intermediate product onto the third intermediate product conveyor 180. In addition, the crusher feeding station 20 is also provided with a fine grain product conveyor 190, which is adjacent to the third intermediate size product conveyor 180 and disposed below the third lower screening deck 170 to convey the fine grain product from the crusher feeding station 20, and a chute 195 is also positioned above the fine grain product conveyor 190 to guide the fine grain product onto the fine grain product conveyor 190. The longitudinal axis of the fine product conveyor 190 is also arranged substantially perpendicular to the longitudinal axis of the sizing screen 110 .

[0056] As shown in the drawings, for crushing the jaws 60 (see also Figure 1 and Figure 2) A discharge conveyor 70 for conveying sized crushed products is also located below the discharge end 115 of the grading screen 110 to receive the first grading screen on-screen product from the grading screen 110 so that the first grading screen on-screen product is combined with the sized crushed products.

[0057] Now refer to Figure 4 and Figure 5 The operation of the crusher feed station 20 is described. In operation, the bulk material moves through the feed station 20 in the direction indicated by Figure 4 Indicated by the arrows in the figure, and the three screening tables 120, 130, 140 of the grading screen 110 are Figure 5 More clearly shown in .

[0058] As shown in the drawings, feed material from a hopper 80 is delivered by a primary feeder 90, which is typically a vibrating pan feeder 200, to a scalping table 100. The scalping table 100 removes undersize material from the feed material to form a scalping table oversize crusher feed and an undersize (underflow) portion, and feeds the scalping table oversize crusher feed to a jaw crusher 60 (see FIG. Figure 1 and Figure 2 ) for crushing and passing through the main product discharge conveyor 70 (see also Figure 2 ) is removed as a sized crushed product and the underflow portion drops to the triple stage grading screen 110 for further processing.

[0059] At the triple stage grading screen 110, the screening media 150 of the first upper stage 120 screens the material to produce a first grading screen oversize product. Typically, the first stage screening media 150 is sized to size the first grading screen oversize product based on the sized crushed product that descends from the discharge end 115 of the grading screen 110 onto the main product discharge conveyor 70.

[0060] The sizes of the screening media 150, 160, 170 of the first upper screening table 120, the second screening table 130 and the third screening table 140 are set so that the output products passing through the three screening tables 120, 130, 140 form a second fine particle product, which is conveyed by the fine particle product conveyor 190 from the feed station 20 as a processed finished product.

[0061] In addition, the sizes of the corresponding screening media 160, 170 of the second lower table 130 and the third lower table 140 are set to produce a third intermediate size product as the second lower table 130 and the third lower table 140 screen products, which descend from the discharge end 115 of the grading screen 110 to the third intermediate product conveyor 180, and the third intermediate product conveyor 180 conveys the third intermediate product from the feed station 20 as an additional processed finished product.

[0062] The coarse screen deck 100 and screening media 150, 160, 170 can be configured and sized as needed depending on the desired finished product size and grade. For example, in one configuration, the maximum opening on the coarse screen deck of the primary feeder is 150 mm so that the oversize material is passed to the jaw crusher 60 (see also Figure 1 and Figure 2 ) for crushing, while the undersize falls on the grading screen 110, where the first upper stage screening media has an opening of 120 mm to achieve a product of about 100 mm passing through. As described above, the second screening deck 130 and the third screening deck 130 can be configured by the end user, and one suitable configuration is 75 mm openings in the second stage screening media 160 and 25 mm openings in the third lower stage screening media 170 on the lower screen deck. Therefore, in this configuration, the oversize product of the first grading screen with a size of about 100 mm+ is sent to the jaw crusher 60 or to the main product conveyor 70, depending on the requirements, the material with a size between about 25 mm and about 75 mm forms a third intermediate size product and is discharged on the third intermediate product conveyor 180, and the material with a size less than about 25 mm forms a fine product as an output product discharged on the fine product conveyor 190. In this configuration, the main product from the mobile crusher 10 has a size ranging from about 150 mm down to dust.

[0063] Reference again Figure 3 , the feed station includes a displaceable mechanical diverter 117. The diverter 117 is configured to selectively receive material from the first upper table 120 or the second lower table 130, in particular from the respective discharge ends of the first upper table 120 and the second lower table 130. This configuration advantageously allows selective bypassing of material, such as passing the third intermediate product from the second lower table 130 through the intermediate product conveyor 180. Thus, the third intermediate size product can be mixed with the first grading screen oversize product, or it can be conveyed by the intermediate product conveyor 180. The diverter 117 is configured in the shape of a pivotable member, for example Figure 3The pivotable plate or hatch shown. The diverter 117 has a receiving end and a discharge end. The receiving end is shiftable between the first upper stage 120 and the second lower stage 130, in particular between the respective discharge ends of the first upper stage and the second lower stage.

[0064] Reference Figure 4 , the crusher feed station 20 has a general feeding direction S along the longitudinal direction of the feed station 20. In any embodiment, the feed station is configured to feed the coarse screen deck oversize crusher feed and the undersize portion along the feeding direction S. Preferably, the undersize portion is fed, e.g. flows, immediately below the oversize crusher feed.

[0065] Each of the at least three screening tables 120 , 130 , 140 may extend along the feed direction from a corresponding upstream receiving end to a downstream discharge end of the at least three screening tables.

[0066] The coarse screen table oversize crusher feed and undersize feed stream are fed continuously in the feed direction of the feed station, at least until discharge to the corresponding conveyor 70, 180, 190, such as from e.g. Figure 4 As can be derived.

Claims

1. A crusher feed station (20) for feeding feed material into a crusher (10), the crusher (10) being configured to produce a sized crushed product, the crusher feed station (20) comprising: Primary Feeder (90); a coarse screen station (100) for removing undersize material from the feed material to form a coarse screen station oversize crusher feed and undersize (underflow) portion; as well as The grading screen (110) located below the coarse screen stage (100) is used to screen the undersize (underflow) portion, wherein the grading screen (110) comprises at least three screening stages (120, 130, 140), and the at least three screening stages (120, 130, 140) are configured to produce a first grading screen upper product, a second fine particle product, and a third intermediate size product.

2. The crusher feed station (20) according to claim 1, wherein: The first upper stage (120) of the three screening stages (120, 130, 140) includes a first stage screening medium (150) sized to produce the first sizing screen oversize product.

3. The crusher feed station (20) according to claim 2, wherein: The first screening medium (150) is sized to set the size of the product on the first sizing screen according to the sized crushed product.

4. A crusher feeding station (20) according to claim 2 or 3, wherein: The first upper stage (120) and the second lower stage (130) and the third lower stage (130) of the three screening stages (120, 130, 140) include screening media (150, 160, 170) whose sizes are set to produce the second fine particle product as the output product.

5. The crusher feed station (20) according to claim 4, wherein: The second lower station (130) and the third lower station (140) include screening media (160, 170) sized to produce a third intermediate size product as an oversize product of the second lower station (130) and the third lower station (140).

6. The crusher feed station (20) according to any one of claims 1 to 5, further comprising a third intermediate size product conveyor (180), wherein the third intermediate size product conveyor (180) is used to convey the third intermediate product from the crusher feed station (20).

7. A crusher feed station (20) according to any one of claims 1 to 6, further comprising a fine product conveyor (190) for conveying the fine product from the crusher feed station (20).

8. A crusher feeding station (20) according to any one of claims 1 to 7, wherein: The grading screen (110) comprises a vibrating grading screen (110).

9. A crusher feeding station (20) according to any one of claims 1 to 8, wherein: The primary feeder (90) comprises a vibrating plate feeder (200).

10. A crusher (10) comprising a crusher feed station (20) according to any one of claims 1 to 9.

11. The crusher (10) according to claim 10, wherein: The crusher (10) further comprises a discharge conveyor (70) for conveying sized crushed products from the crusher (10), and the discharge conveyor (70) is located below a discharge end (115) of the grading screen (110) to receive the products on the first grading screen from the grading screen (110).

12. A crusher (10) according to claim 10 or 11, wherein: The crusher (10) comprises a jaw crusher (60), a cone crusher or an impact crusher.

13. A method of feeding feed material from a feed station (20) to a crusher (10), the crusher (10) being configured to produce a sized crushed product from the feed material, the method comprising: The feed material on the coarse screen table (100) at the feed station (20) is coarsely screened to form a coarse screen table over-screen crusher feed and an under-screen (underflow) portion, and The underflow portion at the feed station (20) is screened using a grading screen (110) having at least three screening stages (120, 130, 140) to form a first grading screen oversize product, a second fine particle product and a third intermediate size product.

14. The method according to claim 13, wherein: The underflow portion is screened by a first upper stage (120) among the three screening stages (120, 130, 140) to produce the first grading screen upper product.

15. The method according to claim 14, wherein: The undersize (bottom flow) portion is screened by the first upper stage (120) and the second lower stage (130) and the third lower stage (140) among the three screening stages (120, 130, 140) to produce the second fine particle product as the output product, and the third intermediate product is produced by the second lower stage (130) and the third lower stage (140) as the oversize product of the second lower stage (130) and the third lower stage (140).

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