Anti-adhesion crushing tool for crushing damp ores

Abstract

The present invention relates to an anti-adhesion crushing tool for crushing damp ores. The anti-adhesion crushing tool can effectively improve the current working environment in attapulgite crushing, and is beneficial to effectively improve the anti-adhesion properties of the attapulgite clay.

Claims

1. An anti-adhesion crushing tool for crushing cohesive damp ores into cohesive damp ore pellets, comprising: a first crushing roller, wherein the first crushing roller comprises a first roller body, wherein the first roller body is a revolving member formed with an axial hole for receiving a first rotation shaft; and wherein the first crushing roller further comprises a plurality of crushing teeth, wherein the plurality of crushing teeth are arranged in a plurality of first annular crushing patterns running circumferentially around the first roller body, wherein each crushing tooth comprises a guiding-in slope, wherein the guiding-in slope has its angle θ change in a non-steep manner to connect to a top portion of the crushing tooth, wherein the top portion of the crushing tooth connects to a guiding-out slope, wherein the guiding-out slope has its angle β change in a non-steep manner, and the guiding-out slope connects to a valley portion, wherein the valley portion connects in a non-steep manner to a guiding-in slope of the adjacent crushing tooth so that a transitionally connecting portion that has at least two curvatures is formed between two adjacent crushing teeth; and a second crushing roller, wherein the second crushing roller comprises a second roller body, wherein the second roller body is a revolving member formed with an axial hole for receiving a second rotation shaft; wherein the second crushing roller further comprises a plurality of crushing teeth, wherein the plurality of crushing teeth are arranged in a plurality of second annular crushing patterns running circumferentially around the second roller body, wherein each crushing tooth comprises a guiding-in slope, wherein the guiding-in slope has its angle θ change in a non-steep manner to connect to a top portion of the crushing tooth, wherein the top portion of the crushing tooth connects to a guiding-out slope, wherein the guiding-out slope has its angle β change in a non-steep manner, and the guiding-out slope connects to a valley portion, wherein the valley portion connects in a non-steep manner to a guiding-in slope of an adjacent crushing tooth, so that a transitionally connecting portion that has at least two curvatures is formed between two adjacent crushing teeth; and wherein the first annular crushing patterns are spaced in an axial direction of the first roller body, and wherein a first crushing cavity is formed in the space in between any two adjacent first annular crushing patterns of the first roller body, wherein said space is defined by the guiding-out slope, valley portion and transitionally connecting portion of said crushing tooth with the guiding-in slope of said adjacent tooth; and wherein the second annular crushing patterns are spaced in an axial direction of the second roller body, and wherein a second crushing cavity is formed in the space in between any two adjacent second annular crushing patterns of the second roller body, wherein said space is defined by the guiding-out slope, valley portion and transitionally connecting portion of said crushing tooth with the guiding-in slope of said adjacent tooth; and wherein the first crushing roller and the second crushing roller are such arranged that their axes are parallel to each other, and wherein when the first crushing roller and the second crushing roller rotate in relation to each other in a rotation direction (ω), so that in the rotation direction, the crushing teeth of the first annular crushing patterns of the first crushing roller lodge within the second crushing cavities of the second crushing roller to form a first match, and the crushing teeth of the second annular crushing patterns of the second crushing roller lodge within the first crushing cavities of the first crushing roller to form a second match; and wherein as the rotation of the crushing rollers occurs, a plurality of crushing gaps is formed in the axial direction between the first crushing roller and the second crushing roller, wherein each crushing gap is a radial interval formed by the first and second matches between the corresponding annular crushing patterns and crushing cavities of the first and second crushing rollers; wherein a rate by which a guiding-in slope angle (θ) of the guiding-in slope changes with a guiding-in radial height of the guiding-in slope is smaller than a rate by which a guiding-out slope angle (β) of the guiding-out slope changes with a guiding-out radial height of the guiding-out slope, so that in the rotation direction of the first crushing roller and the second crushing roller, the curvature of the transitionally connecting portion at a guiding-in slope of a tooth is greater than the curvature of the transitionally connecting portion at the guiding-out slope of the adjacent tooth.

2. The crushing tool of claim 1, wherein during the rotation of the crushing rollers, the first and second annular crushing patterns are able to rotate with respect to the matched crushing cavities in a manner that the crushing gaps rise and fall.

3. The crushing tool of claim 2, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, the top portion has a flat-top shape.

4. The crushing tool of claim 3, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, during the rotation of the crushing rollers, two adjacent said crushing gaps in the axial direction are able to crush the cohesive damp ores into cohesive damp ore pellets in a manner that the crushing gaps rise and fall asynchronously.

5. The crushing tool of claim 4, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, a radial height (R.sub.h) between the top portion and the valley portion of the crushing tooth of an annular crushing pattern is greater than a first radial width between the top portion and the corresponding crushing cavity, so that during the rotation of the first or second crushing roller, a second radial width of the crushing gap periodically changes based on the transitionally connecting portion that have at least two curvatures in a range between one time of the first radial width and more than two times of the first radial width.

6. The crushing tool of claim 5, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, the top portion has a radian smaller than a radian of the valley portion.

7. The crushing tool of claim 6, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, the first and second rollers are configured such that the cohesive ore pellets can come off the crushing cavities as the slope angle of the guiding-out slope gradually decreases in a manner that an adhesion force between the cohesive ore pellets and the crushing cavities is smaller than a centrifugal force applied thereto by the crushing roller.

8. The crushing tool of claim 7, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, in the rotation direction of the crushing roller, a front end of the valley portion that has a flat surface that extends to the guiding-out slope that extends to the top portion of the crushing tooth in a manner that the guiding-out slope angle of the guiding-out slope increases gradually, and a rear end of the valley portion extends to the guiding-in slope that extends to the top portion of said adjacent crushing tooth in a manner that the guiding-in slope angle increases gradually, so that the transitionally connecting portion that has at least two curvatures is formed between each two adjacent said crushing teeth.

9. The crushing roller of claim 6, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, when the annular crushing patterns engage with the corresponding crushing cavities, the cohesive ore pellets can come off the crushing cavities as the slope angle of the guiding-out slope gradually decreases in a manner that an adhesion force between the cohesive ore pellets and the crushing cavities is smaller than a centrifugal force applied thereto by the crushing rollers.

10. The crushing roller of claim 9, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, the top portion has grains, wherein a portion of each grain is parallel to the direction of linear velocity and adjacent grains are connected.

11. The crushing roller of claim 10, wherein for each crushing tooth of the plurality of crushing teeth of the first crushing roller and the plurality of crushing teeth of the second crushing roller, the radial height (R.sub.h) between the top portion and the valley portion is greater than the minimum radial width between the top portion and the second crushing cavity, so that the cohesive attapulgite pellets can come off the valley portion under the action of the centrifugal force as the crushing gaps widen when the first crushing roller and the second crushing roller rotate toward each other.

12. The crushing roller of claim 11, wherein when the first crushing roller rotates with respect to the second crushing roller, the top portions and the valley portions work with the second crushing cavities to change the rising and falling profile of the crushing gaps.

13. An anti-adhesion crushing method for crushing attapulgite clay, comprising using the crushing tool of claim 1, wherein the crushing roller rotates in a continuous or stepped manner.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 schematically illustrates a bionics-based anti-adhesion crushing tool for crushing damp ores as provided in the present invention;

(2) FIG. 2 depicts a preferred bionic crushing pattern according to the present invention;

(3) FIG. 3 is a conventional crushing tool in the art of the present invention; and

(4) FIG. 4 is a schematic drawing of the crushing tool of the present invention.

(5) 100: first crushing roller; 200: second crushing roller; 100a: first annular crushing patterns; 100b: crushing cavities; 100c: top portion; 100d: valley portion; 100e: guiding-out slope; 100f: guiding-in slope; 200a: second annular crushing patterns; 200b: second crushing cavity; θ: guiding-in slope angle; β: guiding-out slope angle; 300a: crushing gaps.

DETAILED DESCRIPTION OF THE INVENTION

(6) The following detailed description will be made with reference to FIGS. 1-4.

(7) The present invention relates to an anti-adhesion crushing tool used for crushing damp ores, and particularly attapulgite clay, which is configured to crush cohesive attapulgite clay into cohesive attapulgite pellets. Attapulgite clay is one of the materials for making nanometer ceramic separators of lithium-ion batteries, and its physical properties determine the key performance of the resulting separators. If attapulgite clay has moisture therein vaporized and then undergoes the crushing operation, its cohesion is degraded due to the reduced moisture. This can directly reduce the physical performance of the processed attapulgite ores, and indirectly make nanometer material separators in lithium-ion batteries deteriorate in terms of performance. Besides, in view of the increasingly demanding requirements for environmental protection and for energy conservation, the traditional “drying and then crushing” process for attapulgite clay is no more competent. In addition, drying attapulgite clay before crushing it requires a discontinuous process, and this can have adverse effects on the crushing efficiency for making attapulgite pellets.

(8) However, hydrous attapulgite ores are highly cohesive, and the existing crushing devices can either fail to well crush the material or have problems about being stuck due to the cohesiveness of the material. For example, the inventor found in experiments that a jaw crusher can directly compress attapulgite clay in to cakes. Also as demonstrated in experiments conducted by the inventor, some existing crushing rollers can break large-sized attapulgite ores into relatively small pieces but fail to meet the size requirement of 5˜20 mm. Other existing crushing rollers may have the ability to produce pellets of 5˜20 mm, but their crushing gaps tend to be stuck by attapulgite clay. Therefore, the existing devices are not competent means for crushing cohesive attapulgite clay at all.

(9) Bionics is an advanced technology that applies structural and functional principles of organisms to inventions of novel equipment, tools and techniques for improving production and promoting scientific development. The inventor of the present invention spent years in researching into how earthworms, dung beetles and pangolins move in soil and has found that earthworms, dung beetles and pangolins have their non-smooth body surfaces effective in preventing adhesion. After modeling, simulation and extensive experiments, the inventor devised special crushing teeth for a crushing tool that bionically mimic the body structure of earthworms and are effective in preventing attapulgite pellets from blocking crushing gaps.

Embodiment 1

(10) FIG. 3 shows a conventional crushing roller, which comprises crushing teeth spaced along its circumference. Each two adjacent teeth are not in contact with each other, and the tooth has a steep shape. In use, the cohesive material being processed can build up at the root portions of the crushing teeth, and eventually block the crushing gaps after long-term use. Bionics is an advanced technology that applies structural and functional principles of organisms to inventions of novel equipment, tools and techniques for improving production and promoting scientific development. After modeling, simulation and extensive experiments, the inventor devised special crushing teeth for a crushing tool that bionically mimics the body structure of earthworms and is effective in preventing attapulgite pellets from blocking crushing gaps.

(11) Based on this, the present embodiment discloses an anti-adhesion crushing tool for crushing damp ores. The crushing tool comprises crushing rollers. The crushing roller comprises a roller body and crushing teeth axial spaced on the roller body for crushing damp ores into damp ore pellets. As shown in FIG. 2, the crushing tooth comprises a guiding-in slope 100f, a top portion 100c, a valley portion 100d and a guiding-out slope 100e. The guiding-in slope 100f forms a non-steep connecting portion between the top portion 100c and the valley portion 100d of the crushing tooth. The term “non-steep” when used to describe the profile of the guiding-in slope 100f means that mathematically the profile changes continuously without any discontinuities. The guiding-in slope 100f serves to firstly shovel clay to simulate wriggling movements of earthworms in soil. In the rotation direction ω of the crushing roller, the top portion 100c of the crushing tooth that follows the guiding-in slope 100f and has a roughly plateau-like shape transitionally extending to the guiding-out slope 100e in a non-steep manner. Preferably, the guiding-out slope 100e transitionally extends to the root portion of the guiding-in slope 100f of the next crushing tooth along the rotation direction ω of the crushing roller. During its extension, the guiding-out slope has its angle β change in a non-steep manner so that a transitionally connecting portion that has at least two curvatures is formed between two adjacent crushing teeth. The transitionally connecting portion extends in a non-steep manner all along the rotation direction ω for crushing operation. As shown in FIG. 2, non-steep crushing gaps 300 are formed between the top portions 100c of the corresponding crushing teeth and the curved bottom of the matched crushing cavities. As shown in FIG. 2, the first crushing roller 100 has wavy first annular crushing patterns 100a spaced in its axial direction. Each of the first annular crushing pattern 100a is composed of the guiding-out slope 100f, the top portion 100c, the guiding-out slope 100e and the valley portion 100d arranged successively. A first crushing cavity is 100b formed between two adjacent first annular crushing patterns 100a. The second crushing roller 200 has wavy second annular crushing patterns 200a spaced in its axial direction. A second crushing cavities 200b is formed between two adjacent second annular crushing patterns 200a. The first annular crushing pattern 100a lodges in the corresponding second crushing cavity 200b, and the radial intervals therebetween are the crushing gaps 300. Meanwhile, the second annular crushing pattern 200a lodges in the corresponding first crushing cavity 100b, and the radial intervals therebetween are further crushing gaps 300. When the first crushing roller 100 and the second crushing roller 200 rotate toward each other, the crushing gaps 300 dynamically rise and fall with the changing wavy profiles of the first annular crushing patterns 100a and/or the second annular crushing patterns 200a. The annular crushing pattern is inspired by wriggling morphology of earthworms in soil. In the present embodiment, cohesive attapulgite ores falling on first and second crushing rollers 100, 200 from above by the gravity first come into contact with the surfaces of the two rollers, and then gradually enter crushing gaps as the first and second crushing rollers 100, 200 rotate toward each other so as to be ground, crushed and/or torn into attapulgite pellets in the crushing gaps 300. At last, the attapulgite pellets in the rising and falling crushing gaps 300 can come off the crushing tool under the effect of the rising and falling of the crushing gaps 300 and the centrifugal force caused by the crushing tool.

(12) Preferably, the crushing teeth form the annular crushing patterns by having the top portion 100c transitionally connected to the valley portions 100d at its two sides through the guiding-out slope 100e and the guiding-in slope 100f, respectively. Therefore, during rotation of the crushing rollers, the double-curvature transitionally connecting portions, the top portions and the valley portions change the rising and falling patterns of the crushing gaps 300a according to predetermined periodicity, simulating earthworms wriggling in soil without having soil adhered thereto). The clay in the crushing gaps primarily undergoes operations of shoveling, pressing, grinding, and releasing. As shown in FIG. 4, plural attapulgite clay material masses are feed into the crushing tool from above and fall down between two crushing rollers by gravity. The rising and falling of the crushing gaps 300 serve to make the contact pressure between the attapulgite pellets and the tool have non-linear, dynamic change. This in turn makes the adhesion force between the attapulgite pellets and the tool have non-linear, dynamic change, so that when the centrifugal force becomes greater than the adhesion forces, the attapulgite pellets come off the tool. Moreover, as cohesive attapulgite clay contains a large quantity of water, a water film forms between the attapulgite pellets and the tool, and the rising and falling of the crushing gaps has effects on the depth of this water film. Particularly, the deeper the water film is, it can be broken away more easily. The rising and falling of the crushing gaps can increase the depth of the water film in a non-linear manner until the attapulgite pellets break away from the water film. The crushing tool is designed to crush raw attapulgite clay with a size of 15 mm˜50 mm. The raw attapulgite clay is physically processed in the crushing gaps 300 through compressing and tearing to eventually be broken into small pellets. After repeated experiments, the final attapulgite pellets made from raw, cohesive attapulgite clay in one embodiment of the present invention had the pellets size of 5˜20 mm.

(13) Preferably, the top portion 100c has grains. The grains on the top portion 100c run roughly parallel to the direction of linear velocity. The grains are mainly inspired by the structure of the shell of a dung beetle. The shell of a dung beetle has spaced grains roughly parallel to its traveling direction. Preferably, the adjacent grains are connected in a smooth and continuous manner. Preferably, the interval between adjacent grains is narrower than the required pellet size, so that attapulgite pellets are unlikely to be inlaid between adjacent grains. Preferably, the grains have a wave height and a wave crest each of 1˜3 mm. Preferably, an acute angle is included by the grains at the edge of the top portion and the direction of linear velocity. The acute angle is rough of 5˜20°, so that attapulgite pellets are driven to move radiatively with respect to the top portions 100c. The inventor also found in a numerical simulation that transverse grains can mainly reduce adhesion between attapulgite pellets and the top portion 100c, so that the centrifugal force acting on the attapulgite pellets when the crushing rollers rotate is greater than the adhesion force, thereby allowing the attapulgite pellets to come off the tool. In addition, since attapulgite pellets contain water, a water film is formed between the attapulgite pellets and the tool. The transverse grains can change the depth of the water film. The deeper the water film is, the attapulgite pellets can escape from it more easily. The transverse grains can change the depth of the water film between the attapulgite pellets and the tool in a non-linear manner until the water film is broken away.

(14) Preferably, a rate by which the guiding-in slope angle θ of the guiding-in slope 100e changes with a guiding-in radial height of the guiding-in slope 100e is smaller than a rate by which a guiding-out slope angle β of the guiding-out slope (100f) changes with a guiding-out radial height of the guiding-out slope 100f, so that in the rotation direction of the crushing roller, the curvature of the transitionally connecting portion at a front side of the top portion 100c is greater than the curvature of the transitionally connecting portion at a back side of the top portion 100c. Based on this, the contact pressure between the cohesive attapulgite pellets and the crushing tool can dynamically change with the profile of the crushing gaps 300 in a manner that it increases first and then stays steady before finally decreases, thereby allowing the cohesive attapulgite pellets to come off the valley portion 100d as the adhesion force between the attapulgite pellets and the crushing tool sharply decreases in the process that the first crushing roller 100 and the second crushing roller 200 rotate toward each other.

(15) Preferably, the axially adjacent two top portions 100c of the crushing roller are separated by the valley portion 100d. As observed in the axial direction, the transitionally connecting portions of two adjacent said crushing patterns are circumferentially staggered to each other. Therefore, as the crushing rollers rotate toward each other, axially adjacent two crushing gaps 300 rise and fall asynchronously.

(16) Preferably, a radial height R.sub.h between the top portion 100c and the valley portion 100d is greater than a first radial width between the top portion 100c and the corresponding crushing cavity, so that during rotation of the crushing rollers, a second radial width of the crushing gap 300 periodically changes based on the transitionally connecting portion in a range between one time of the first radial width and more than two times of the first radial width.

(17) Preferably, the crushing cavities are smooth cavities formed by annular crushing patterns that are parallel to and spaced from each other and the circumferential surface of a roller body of the crushing roller. The smooth cavities can decrease the contact force between itself and the clay, thereby decreasing adhesion. Therefore, when the annular crushing patterns and the corresponding crushing cavities combine and form the crushing gaps 300, the cohesive attapulgite pellets can come off the crushing cavities 100b as the slope angle of the guiding-out slope 100f gradually decreases to the extent that the adhesion between the attapulgite pellets and the crushing cavities becomes smaller than the centrifugal force applied to the attapulgite pellets by the crushing rollers, thereby further preventing clogging.

(18) Preferably, the valley portion 100d may be roughly horizontal or have a wavy surface with local bulges. The front end of the valley portion 100d extends to the top portion 100c of the present crushing tooth through the guiding-out slope 100f in a manner that the guiding-out slope angle θ gradually increases. The rear end of the valley portion 100d extends to the top portion of the next crushing tooth through another guiding-in slope in a manner that the guiding-in slope angle θ gradually increases. Therefore, the transitionally connecting portion having at least two curvatures is formed between two adjacent crushing teeth.

Embodiment 2

(19) The present embodiment discloses an anti-adhesion crushing method for attapulgite clay as further improvements to Embodiment 1. Without causing conflict or contradiction, the entire and/or part of preferred modes of other embodiments may be incorporated into the present embodiment as supplements.

(20) The present embodiment discloses a crushing tool configured to directly crush the cohered attapulgite clay into cohesive attapulgite ores.

(21) As shown in FIG. 1, the crushing tool comprises a first crushing roller 100 and a second crushing roller 200. The first crushing roller 100 and the second crushing roller 200 are such arranged that their axes are parallel to each other. In addition, each of the rollers has a rotation shaft and a rotation drive mechanism. The respective rotation mechanism drives the rotation shafts to make the first crushing roller 100 and the second crushing roller 200 rotate toward each other or rotate away from each other. The first crushing roller 100 comprises a roller body. The roller body is structurally a revolving member, such as a column. The column is centrally formed with an axial hole for receiving the rotation shaft. The second crushing roller 200 has a roller body similar to that of the first crushing roller 100.

(22) The first crushing roller 100 and the second crushing roller 200 when rotating toward or away from each other, can form crushing gaps 300. The crushing gaps 300 serve to crush cohesive attapulgite ores into cohesive attapulgite pellets. The crushed cohesive attapulgite pellets have a pellet size of 5˜20 mm. Therefore, the crushing gaps 300 are sized in the range of 5˜20 mm.

(23) Preferably, as shown in FIG. 2, the first annular crushing pattern 100a comprises top portions 100c that are spaced in the circumferential direction of the first crushing roller 100. The adjacent two top portions 100c are connected by a valley portion 100d. When the first crushing roller 100 rotates with respect to the second crushing roller 200, the top portions 100c and the valley portions 100d alternately work with the second crushing cavities 200b to change the rising and falling profile of the crushing gaps 300.

(24) Preferably, the top portion 100c is transitionally connected to valley portions 100d at its two sides through the guiding-out slope 100e and guiding-in slope 100f, respectively. Therein, the guiding-in slope angle θ of the guiding-in slope 100e is greater than the guiding-out slope angle β of the guiding-out slope 100f.

(25) Preferably, a valley portion 100d is formed between axially adjacent two top portions 100c of the first crushing roller 100. Thereby, when the first crushing roller 100 and the second crushing roller 200 rotate toward each other, the adjacent two crushing gaps 300 can rise and fall asynchronously and crush cohesive attapulgite ores into cohesive attapulgite pellets.

(26) Preferably, the guiding-out slope 100e, the top portion 100c, the guiding-in slope 100f and the valley portion 100d are connected as a unit having a continuous, smooth surface to form the non-flat, wavy first annular crushing pattern 100a. The radian of the top portion 100c is smaller than the radian of the valley portion 100d.

(27) Preferably, the radial height R.sub.h between the top portion 100c and the valley portion 100d is greater than the minimum radial width between the top portion 100c and the second crushing cavity 200b, so that the cohesive attapulgite pellets meeting the granularity requirement can come off the valley portion 100d under the action of the centrifugal force as the crushing gaps 300 widen when the first crushing roller 100 and the second crushing roller 200 rotate toward each other.

(28) Preferably, the crushing cavities 100b are smooth cavities formed by first annular crushing patterns 100a that are parallel to and spaced from each other and the circumferential surface of a roller body of the crushing roller, so that when the second annular crushing patterns 100b engage with the corresponding crushing cavities, cohesive attapulgite pellets can come off the crushing cavities 100b in a manner that an adhesion force between the cohesive attapulgite pellets and the crushing cavities 100b is smaller than a centrifugal force applied thereto by the crushing roller.

Embodiment 3

(29) The present embodiment discloses an anti-adhesion crushing method for attapulgite clay as further improvements to Embodiment 1 or 2. Without causing conflict or contradiction, the entire and/or part of preferred modes of other embodiments may be incorporated into the present embodiment as supplements.

(30) The method can crush cohesive attapulgite ores into cohesive attapulgite pellets while preventing cohesive attapulgite pellets from adhering to the crushing tool.

(31) The crushing method comprises: providing a first crushing roller 100 and a second crushing roller 200 that are configured to rotate toward each other, wherein crushing gaps 300 serving to crush cohesive attapulgite ores crushing into cohesive attapulgite pellets are formed when at least one of the rollers rotates; providing wavy first annular crushing patterns 100a spaced along the axial direction of the first crushing roller 100 so that first crushing cavities 100b are formed between the adjacent first annular crushing patterns 100a; providing wavy second annular crushing patterns 200a spaced along the axial direction of the second crushing roller 200 so that second crushing cavities 200b are formed between the adjacent second annular crushing patterns 200a; and having crushing gaps 300 formed when the first annular crushing patterns 100a lodge in the second crushing cavities 200b and the second annular crushing patterns 200a lodge in the first crushing cavities 100b, and feeding cohesive attapulgite ores into the crushing gaps 300 that dynamically rise and fall when one of the first crushing roller 100 and the second crushing roller 200 rotates or when the first crushing roller 100 and the second crushing roller 200 rotate toward each other for anti-adhesion crushing.

(32) Preferably, the crushing roller(s) may rotate continuously or in a stepped manner. Continuous crushing is conventional in the art. On the other hand, stepped crushing means that the crushing rollers rotate intermittently, and this provides a greater centrifugal acceleration that increases the centrifugal force acting on the clay pellets, so that the clay can come off the surfaces of the crushing rollers more easily.

Embodiment 4

(33) The present embodiment discloses a crushing roller. Without causing conflict or contradiction, the entire and/or part of preferred modes of other embodiments may be incorporated into the present embodiment as supplements.

(34) The crushing roller has wavy annular crushing patterns spaced in its axial direction, and crushing cavities are formed between adjacent annular crushing patterns.

(35) When the crushing roller and a further crushing roller rotate toward each other or when either of which rotates, crushing gaps are formed when the annular crushing patterns lodge in crushing cavities of the further crushing roller and the wavy annular crushing patterns of the further crushing roller lodge in the crushing cavities of the crushing roller. When entering the crushing gaps that dynamically rise and fall, cohesive damp ores are crushed without adhering to the rollers.

(36) The present invention has been described with reference to the preferred embodiments and it is understood that the embodiments are not intended to limit the scope of the present invention. Moreover, as the contents disclosed herein should be readily understood and can be implemented by a person skilled in the art, all equivalent changes or modifications which do not come off the concept of the present invention should be encompassed by the appended claims.