A split-type wear-resistant discharger for a semi-autogenous mill

Abstract

The application discloses a split type wear-resistant discharger for a semi-autogenous mill and relates to the technical field of semi-autogenous mill discharging. The bottom plate is arranged below the cover plate, and a reinforcing assembly is arranged between the cover plate and the bottom plate; a buckle assembly is arranged on one side of the cover plate, and the cover plate is fixedly connected with another cover plate through the buckle assembly; the cover plate comprises a main wear-resistant part and a curved surface part, and the thickness of the cover plate is stepwise increased from the main wear-resistant part to the curved surface part. In the application, the whole discharger is split into multiple fan-shaped units which can be independently prefabricated through the split type fan-shaped unit and the multi-stage buckle splicing assembly, the hoisting weight of a single piece is greatly reduced, the on-site installation difficulty is reduced, the adjacent units are quickly guided and aligned through the isosceles trapezoidal protrusions and the clamping grooves, the work surface after splicing is ensured to be flush and free of errors, and the local wear caused by the height difference is avoided.

Description

Technical Field

[0001] This invention relates to the field of semi-autogenous mill discharge technology, specifically a segmented wear-resistant discharge device for semi-autogenous mills. Background Technology

[0002] Semi-autogenous mills, as core grinding equipment in the mineral processing field, are widely used in material crushing and grinding processes in industries such as metal mines, non-metallic minerals, and building materials. The discharge device, installed inside the discharge end cover of the semi-autogenous mill, is a key component for achieving forced material discharge and protecting the end cover substrate from impact and wear. Its structural reliability and wear-resistant life directly determine the mill's continuous operation capability and production and maintenance costs.

[0003] Currently, most feeders in the industry adopt a monolithic casting structure. While this structure offers good overall impact resistance, it suffers from drawbacks such as large individual component size and excessive weight. On-site installation and replacement require large hoisting equipment, resulting in high construction barriers, long downtime for maintenance, and significant regional differences in wear on the feeder's working surface. Once a localized area reaches its wear limit, the entire feeder must be scrapped and replaced, leading to substantial spare parts waste and high maintenance costs, making it unsuitable for the efficient operation and maintenance requirements of large semi-autogenous mills. Therefore, there is an urgent need for a segmented wear-resistant feeder for semi-autogenous mills to solve these problems. Summary of the Invention

[0004] In view of the problems in the related technologies, the present invention proposes a segmented wear-resistant feeder for a semi-autogenous mill to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows: A segmented wear-resistant feeder for a semi-autogenous mill includes a cover plate, a bottom plate below the cover plate, and a reinforcing component between the cover plate and the bottom plate. A snap-fit ​​assembly is provided on one side of the cover plate, and one side of the cover plate is fixedly connected to another cover plate by snap-fit ​​assembly. The cover plate includes a main wear-resistant part and an arc-shaped part. The thickness of the cover plate increases in a stepped manner from the main wear-resistant part to the arc-shaped part. The buckle assembly is disposed on both sides of the main wear-resistant part. Both sides of the outer wall of the arc-shaped surface are fixedly connected with fixing ears. The fixing ears on one side of the cover plate and the fixing ears on the other side of the cover plate are fixedly connected by bolts. A circular ring plate is fixedly connected to the circumferential outer wall of the arc-shaped surface.

[0006] Preferably, the base plate includes a reinforcing plate and a flange plate, the distance between the base plate and the cover plate gradually increases along the direction close to the flange plate, and the cross-section of the base plate is L-shaped.

[0007] Preferably, the reinforcing assembly includes a first liner, a second liner, a third liner, and a fourth liner welded to the outer wall of one side of the base plate. The ends of the first liner, the second liner, the third liner, and the fourth liner all extend from the top of the cover plate, and the cross-sections of the portions of the first liner, the second liner, the third liner, and the fourth liner extending from the top of the cover plate are all right-angled trapezoids.

[0008] Preferably, the first liner and the third liner have the same length, and the lengths of the fourth liner and the second liner are both greater than the length of the first liner, with the second liner being greater than the length of the fourth liner.

[0009] Preferably, the second liner includes a main support portion and a diagonal brace portion, wherein the angle between the main support portion and the diagonal brace portion in the vertical direction is 6°-10°, and the diagonal brace portion is fixedly connected to the lower part of the arc-shaped surface.

[0010] Preferably, the second liner and the fourth liner are provided with an assembly groove at the top, and a screw hole is provided on the bottom inner wall of the assembly groove. The screw hole obliquely penetrates the cover plate and the bottom plate, and the oblique angle of the screw hole is 3°.

[0011] Preferably, stress plates are fixedly connected to one side of the outer wall of both the first liner and the third liner, and the top of the stress plate is provided with a corrugated groove, and the width of the stress plate gradually decreases along the direction close to the diagonal brace.

[0012] Preferably, the buckle assembly includes a protrusion fixedly connected to the outer wall of one side of the cover plate, and a slot is also provided on one side of the cover plate, wherein the protrusion on one side of the cover plate cooperates with the slot provided on the other side of the cover plate.

[0013] Preferably, the cross-section of the protrusion is an isosceles trapezoid, the protrusions and slots on one side of the cover plate are staggered, and the size of the protrusion gradually decreases along the direction close to the annular plate.

[0014] Preferably, a second locking groove and a first locking groove are provided on one side of the cover plate, and a first locking block and a second locking block are provided on the other side of the cover plate. The cross-section of the first locking block and the second locking block is mountain-shaped, and the peak of the first locking block is higher than the peak of the second locking block. The first locking block and the second locking block on one side of the cover plate cooperate with the first locking groove and the second locking groove on the other side of the cover plate, respectively.

[0015] The beneficial effects of this invention are: This invention provides a segmented wear-resistant feeder for a semi-autogenous grinding mill. Through segmented fan-shaped units and multi-stage snap-fit ​​splicing components, the overall feeder is divided into multiple independently prefabricated fan-shaped units, significantly reducing the weight of a single unit during hoisting and the difficulty of on-site installation. Simultaneously, adjacent units achieve rapid guidance and alignment through the cooperation of isosceles trapezoidal protrusions and slots, ensuring a flat working surface without misalignment after splicing, avoiding increased localized wear caused by height differences. Furthermore, one side of the cover plate is equipped with staggered, mountain-shaped locking blocks and locking grooves, forming a multi-bend labyrinthine sealing path, significantly increasing the resistance to slurry leakage and effectively preventing high-concentration slurry from seeping into the substrate structure through the splicing seams. The staggered snap-fit ​​structure can also directly transfer circumferential shear loads, reducing the lateral stress on the fixing bolts and further extending their service life.

[0016] This invention provides a segmented wear-resistant feeder for a semi-autogenous grinding mill. It features a hollow box-shaped structure composed of gradient-arranged reinforced liners and stepped-thickness cover plates. Four sets of liners of varying lengths are welded and fixed between the cover plate and the bottom plate to form a supporting frame. While ensuring overall bending and impact resistance, this significantly reduces the unit's self-weight compared to traditional solid cast steel structures, lowering the eccentric load at the mill's discharge end. Simultaneously, the cover plate thickness increases in a stepped manner from the wear-resistant main body towards the arc-shaped surface. This, combined with the gradient-arranged liners, precisely matches the high wear and stress distribution on the outer periphery of the fan-shaped unit. The long liners with diagonal bracing directly support the arc-shaped surface of the cover plate, specifically reinforcing the support strength and wear-resistant margin in the high-load area of ​​the outer ring, preventing deformation, collapse, and excessive wear of the arc-shaped surface due to repeated impacts from steel balls. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall right-side structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the overall left side structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the overall bottom structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the disassembled cover plate structure in this invention.

[0022] Figure 5 This is a top view of the overall structure of the cover plate after it has been disassembled in this invention.

[0023] Figure 6 This is a schematic diagram of the overall structure after the cover plates of the present invention are fitted together.

[0024] Figure 7 This is a schematic diagram of the overall structure of the two sets of cover plates after they have been separated.

[0025] Figure 8 For the present invention Figure 7 A magnified structural diagram of point A in the middle.

[0026] In the picture: 1. Cover plate; 101. Main wear-resistant part; 102. Curved part; 2. Base plate; 201. Reinforcing plate; 202. Flanged plate; 3. Circular ring plate; 4. Fixing ear; 5. First liner plate; 6. Second liner plate; 601. Main support part; 602. Diagonal brace part; 7. Third liner plate; 8. Fourth liner plate; 9. Protrusion; 10. Slot; 11. First locking block; 12. Second locking block; 13. First locking groove; 14. Second locking groove; 15. Screw hole; 16. Assembly groove; 17. Stress plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0028] Please see Figures 1-8A segmented wear-resistant feeder for a semi-autogenous mill includes a cover plate 1, a base plate 2 below the cover plate 1, and a reinforcing assembly between the cover plate 1 and the base plate 2. A snap-fit ​​assembly is provided on one side of the cover plate 1, and one side of the cover plate 1 is fixedly connected to another cover plate 1 via the snap-fit ​​assembly. The cover plate 1 includes a main wear-resistant portion 101 and an arc-shaped portion 102. The thickness of the cover plate 1 increases in a stepped manner from the main wear-resistant portion 101 to the arc-shaped portion 102. The snap-fit ​​assembly is located on both sides of the main wear-resistant portion 101. Fixing ears 4 are fixedly connected to the outer walls of both sides of the arc-shaped portion 102. The fixing ears 4 on one side of the cover plate 1 are fixedly connected to the fixing ears 4 on the other side of the cover plate 1 via bolts. The circumference of the arc-shaped portion 102... The outer wall is fixedly connected with a circular plate 3. By adopting a segmented modular structure design, the feeder is divided into multiple fan-shaped units that can be independently prefabricated and installed, which effectively reduces the weight of a single piece and the difficulty of on-site construction. The cover plate 1 adopts a stepped thickening structure, which can accurately match the working conditions with higher wear rate on the outer periphery of the feeder. Sufficient wear resistance margin is reserved in high wear areas to balance the overall service life. At the same time, adjacent units can be quickly spliced ​​and positioned through snap-fit ​​components. With the bolts of the fixing ears 4, a double connection structure is formed, which significantly improves the circumferential splicing strength. The circular plate 3 set on the outer ring can be spliced ​​to form a continuous ring-shaped baffle, which effectively prevents slurry and materials from overflowing to the outer periphery, ensuring the stability and efficiency of the discharge process.

[0029] Furthermore, the base plate 2 includes a reinforcing plate 201 and a flange plate 202. The distance between the base plate 2 and the cover plate 1 gradually increases along the direction close to the flange plate 202. The cross-section of the base plate 2 is L-shaped. By adopting the L-shaped cross-section structure of the base plate 2, the reinforcing plate 201 bears the main vertical support load. The flange plate 202 can strengthen the structural rigidity and impact resistance of the unit side and form lateral protection for the internal reinforcement components. Since the distance between the base plate 2 and the cover plate 1 gradually increases along the direction of the flange plate 202, it can adapt to the stress distribution law of the material discharge unit where the load gradually increases from the inside to the outside. More sufficient internal support space is reserved in the high load area. Under the premise of ensuring structural strength, the overall self-weight of the unit is reasonably reduced, and the eccentric load of the mill operation is reduced.

[0030] Furthermore, the reinforcing components include a first liner 5, a second liner 6, a third liner 7, and a fourth liner 8 welded to the outer wall of one side of the base plate 2. The ends of the first liner 5, the second liner 6, the third liner 7, and the fourth liner 8 all extend from the top of the cover plate 1. The cross-sections of the portions of the first liner 5, the second liner 6, the third liner 7, and the fourth liner 8 extending from the top of the cover plate 1 are all right-angled trapezoids. By welding the four sets of liners between the cover plate 1 and the base plate 2, a hollow box-shaped support frame is formed. While ensuring the overall bending and impact resistance, the unit weight is significantly reduced compared to the traditional solid cast steel structure. The ends of the liners extend from the top of the cover plate 1 and have right-angled trapezoidal cross-sections, which can directly participate in the wear-resistant protection of the working surface, increase the impact contact area, and evenly distribute and transfer the impact load of the ore and steel balls to the base plate 2, preventing the cover plate 1 from being deformed by local impact, while improving the overall wear resistance of the working surface.

[0031] Furthermore, the first liner 5 and the third liner 7 have the same length, while the fourth liner 8 and the second liner 6 are both longer than the first liner 5, and the second liner 6 is longer than the fourth liner 8. By adopting a liner layout with gradients of long and short liner plates, the longer second liner 6 and the fourth liner 8 are arranged in the outer peripheral area with higher loads, while the shorter first liner 5 and the third liner 7 correspond to the inner peripheral low-load area. This precisely matches the distribution characteristics of the fan-shaped unit, where the outer peripheral stress is high and the inner peripheral stress is low, achieving a differentiated configuration of support strength. This approach focuses on reinforcing high-stress areas while avoiding material redundancy.

[0032] Furthermore, the second liner 6 includes a main support 601 and a diagonal brace 602. The vertical angle between the main support 601 and the diagonal brace 602 is 6°-10°. The diagonal brace 602 is fixedly connected to the lower part of the arc-shaped surface 102. The inclined diagonal brace 602 of the second liner 6 forms an inclined support for the arc-shaped surface 102 of the cover plate 1. The 6°-10° inclination angle can decompose the vertical impact load on the arc-shaped surface 102 into vertical and radial components, effectively weakening the peak impact stress, specifically strengthening the impact resistance of the outer arc-shaped surface area, and preventing the arc-shaped surface 102 from collapsing and deforming under repeated impacts from steel balls and ore, thus significantly improving the structural stability and service life of the high-load area of ​​the outer ring of the feeder.

[0033] Furthermore, the top of both the second liner plate 6 and the fourth liner plate 8 are provided with assembly grooves 16, and the bottom inner wall of the assembly groove 16 is provided with screw holes 15. The screw holes 15 obliquely penetrate the cover plate 1 and the bottom plate 2, and the oblique angle of the screw holes 15 is 3°. The screw holes 15, which are arranged at an oblique angle of 3°, will generate a circumferential component force during the bolt tightening process, which can automatically push the unit to move closer to the adjacent splicing surface, realize the automatic pre-tightening of the splicing seam, and eliminate the need for repeated manual adjustment and alignment, thus greatly improving the on-site installation efficiency.

[0034] Furthermore, stress plates 17 are fixedly connected to one side of the outer wall of the first liner 5 and the third liner 7. The top of the stress plate 17 is provided with a corrugated groove. The width of the stress plate 17 gradually decreases along the direction close to the diagonal brace 602. The stress plates 17 with corrugated grooves on the sides of the first liner 5 and the third liner 7 can evenly distribute the concentrated impact load transmitted from the working surface to the liner body and the bottom plate 2, avoiding local stress concentration that could cause cracking failure at the root of the liner. The corrugated groove structure can also enhance the buffering and energy absorption effect of the structure, weaken the transmission of impact vibration, and reduce the noise during the operation of the mill. Moreover, the width of the stress plate 17 gradually decreases along the direction of the diagonal brace 602, which can adapt to the attenuation law of stress transmission in the radial direction, thus optimizing the amount of material used while ensuring the stress dispersion effect.

[0035] Furthermore, the snap-fit ​​assembly includes a protrusion 9 fixedly connected to the outer wall of one side of the cover plate 1. A slot 10 is also provided on one side of the cover plate 1. The protrusion 9 on one side of the cover plate 1 cooperates with the slot 10 on the other side of the cover plate 1. Adjacent material discharge units are spliced ​​and positioned by the interlocking of the protrusion 9 and the slot 10, which can quickly complete circumferential docking, reduce the difficulty of on-site alignment, and improve installation efficiency. The snap-fit ​​structure with concave and convex interlocking can directly transmit the circumferential shear load between units, effectively reduce the lateral force on the connecting bolts, avoid bolt breakage failure due to shearing, and enhance the overall coordination of each unit after splicing, thereby improving the overall circumferential structural strength of the material discharger.

[0036] Furthermore, the cross-section of the protrusion 9 is an isosceles trapezoid. The protrusion 9 and the groove 10 on one side of the cover plate 1 are staggered. The size of the protrusion 9 gradually decreases along the direction close to the annular plate 3. The protrusion 9 with an isosceles trapezoidal cross-section has a guiding and alignment function, which can guide adjacent units to automatically align, ensuring that the working surface is flat and without misalignment after splicing, avoiding the aggravation of local wear caused by height difference. The staggered layout of the protrusion 9 and the groove 10 can form multiple sealing barriers, improve the anti-leakage ability of the splice joint, and the size of the protrusion 9 gradually decreases along the direction close to the annular plate 3, which can adapt to the distribution change of radial stress from the inside to the outside, while optimizing the processing technology and ensuring the tightness of the splice fit.

[0037] Furthermore, a second locking groove 14 and a first locking groove 13 are provided on one side of the cover plate 1, and a first locking block 11 and a second locking block 12 are provided on the other side of the cover plate 1. The cross-section of the first locking block 11 and the second locking block 12 is mountain-shaped, with the peak of the first locking block 11 being higher than the peak of the second locking block 12. The first locking block 11 and the second locking block 12 on one side of the cover plate 1 respectively cooperate with the first locking groove 13 and the second locking groove 14 on the other side of the cover plate 1. When the peaks are of varying heights... After the first locking block 11 and the second locking block 12 are interlocked with the corresponding first locking groove 13 and the second locking groove 14, a multi-bent labyrinthine sealing path can be constructed, which greatly improves the resistance to slurry leakage and effectively prevents high-concentration slurry from seeping into the unit from the splice seam and corroding the matrix structure. The two-level locking structure with different peaks forms a multi-level shear limit, which can further enhance the transmission capacity of circumferential shear load, strengthen the overall firmness of the unit splice, and improve the operational reliability of the feeder under strong impact conditions.

[0038] In summary, with the help of the above-mentioned technical solution of the present invention, when in use, the workers first complete the prefabrication and assembly of a single fan-shaped material discharge unit. Specifically, the first liner 5, the second liner 6, the third liner 7, and the fourth liner 8 are arranged radially in a gradient of length and fixed to the reinforcing plate 201 of the base plate 2 to form a reinforced support frame. Then, the cover plate 1 is fastened and welded to the top of each liner, so that the cover plate 1, the base plate 2, and the four sets of liner plates together form a box-shaped structure with a hollow interior. This box-shaped reinforced structure, while ensuring the overall bending and impact stiffness, significantly reduces the unit's self-weight compared to the traditional solid cast steel structure, reduces the eccentric load at the mill discharge end, and the gradient arrangement of the liner plates of different lengths precisely matches the distribution law of high stress on the outer periphery and low stress on the inner periphery of the fan-shaped unit. The inclined support 602 of the second liner 6 directly supports the arc-shaped part 102 of the cover plate 1, specifically reinforcing the support strength of the high load area on the outer ring, and preventing the arc-shaped part 102 from deforming and collapsing due to repeated impacts from steel balls. During the subsequent on-site installation phase, the workers hoisted the prefabricated individual sector units one by one to the inside of the discharge end cover of the semi-autogenous mill. Fixing bolts were inserted through the inclined screw holes 15 in the top mounting grooves 16 of the second liner plate 6 and the fourth liner plate 8 to lock the unit as a whole onto the end cover base. Since the screw holes 15 are arranged at a 3° inclination, a circumferential force will be generated during the subsequent bolt tightening process, which will automatically push the unit closer to the adjacent splicing surface, realizing automatic pre-tightening of the splicing seam. There is no need for repeated manual adjustment and alignment, which greatly improves the efficiency of on-site installation. Moreover, the continuous impact load generated by the operation of the mill will further amplify this circumferential tension force, making the bolts tighter with vibration, avoiding the situation where the bolts are easy to loosen under strong impact conditions. When workers assemble two adjacent fan-shaped units, the protrusions 9 on the side of the wear-resistant part 101 of the main body of the cover plate 1 are embedded into the slots 10 of the adjacent units. At the same time, the first locking block 11 and the second locking block 12 are respectively inserted into the first locking groove 13 and the second locking groove 14 of the adjacent units, forming a multi-level concave-convex interlocking fit. The isosceles trapezoidal protrusions 9 and the slots 10 can achieve rapid guidance and alignment, ensuring that the working surface is flat and without misalignment after splicing, avoiding the aggravation of local wear caused by height differences. After the staggered mountain-shaped locking blocks and locking grooves are interlocked, they form a multi-bend labyrinthine sealing path, which greatly improves the resistance to slurry leakage and effectively prevents high-concentration slurry from seeping into the unit from the splicing seam and corroding the matrix structure. At the same time, the staggered interlocking structure can directly transmit circumferential shear loads, reduce the lateral force on the fixing bolts, and further extend the service life of the bolts. After all the fan-shaped units are spliced ​​circumferentially, the fixing ears 4 on the sides of the arc surface 102 of the adjacent units are bolted together and locked. At the same time, the circular ring plates 3 of all units are spliced ​​together to form a complete ring-shaped retaining edge. The tie bolts of the fixing ears 4 can further strengthen the overall strength of the circumferential connection, and the circular ring plates 3 form a continuous material-blocking structure on the outer ring to prevent the slurry from overflowing from the outer periphery during the lifting process, ensuring the stability and efficiency of the discharge process. During the operation of the mill, the load generated by the impact of the ore is transmitted to each of the internal liners through the cover plate 1. The stress plates 17 with corrugated grooves on the sides of the first liner 5 and the third liner 7 can evenly distribute the concentrated impact load to the liner body and the bottom plate 2, avoiding local stress concentration that causes cracking at the root of the liner. The corrugated groove structure can also increase the buffering and energy absorption effect of the structure, weaken the impact vibration, and reduce the operating noise. When the fan-shaped unit rotates to the upper region with the cylinder, the slurry it collects flows inward along the arc of the cover plate 1 under the action of gravity, and finally flows into the central discharge pipe of the mill and is discharged from the machine body, completing the forced discharge process of the semi-autogenous mill.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A segmented wear-resistant feeder for a semi-autogenous mill, comprising a cover plate (1), characterized in that, A bottom plate (2) is provided below the cover plate (1), and a reinforcing component is provided between the cover plate (1) and the bottom plate (2); A snap-fit ​​assembly is provided on one side of the cover plate (1), and one side of the cover plate (1) is fixedly connected to another cover plate (1) by snap-fit ​​assembly. The cover plate (1) includes a main wear-resistant part (101) and an arc-shaped part (102). The thickness of the cover plate (1) increases in a stepped manner along the direction from the main wear-resistant part (101) to the arc-shaped part (102). The buckle assembly is disposed on both sides of the main wear-resistant part (101). The outer walls of both sides of the arc-shaped surface (102) are fixedly connected with fixing ears (4). The fixing ears (4) on one side of the cover plate (1) and the fixing ears (4) on the other side of the cover plate (1) are fixedly connected by bolts. The outer circumferential wall of the arc-shaped surface (102) is fixedly connected with a circular ring plate (3).

2. The segmented wear-resistant feeder for a semi-autogenous mill according to claim 1, characterized in that, The base plate (2) includes a reinforcing plate (201) and a flange plate (202). The distance between the base plate (2) and the cover plate (1) gradually increases in the direction close to the flange plate (202). The cross-section of the base plate (2) is L-shaped.

3. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 2, characterized in that, The reinforcing assembly includes a first liner (5), a second liner (6), a third liner (7), and a fourth liner (8) welded to the outer wall of one side of the base plate (2). The ends of the first liner (5), the second liner (6), the third liner (7), and the fourth liner (8) all extend from the top of the cover plate (1). The cross-sections of the portions of the first liner (5), the second liner (6), the third liner (7), and the fourth liner (8) extending from the top of the cover plate (1) are all right-angled trapezoids.

4. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 3, characterized in that, The first liner (5) and the third liner (7) have the same length. The lengths of the fourth liner (8) and the second liner (6) are both greater than the length of the first liner (5), and the length of the second liner (6) is greater than the length of the fourth liner (8).

5. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 4, characterized in that, The second liner (6) includes a main support part (601) and a diagonal brace part (602). The angle between the main support part (601) and the diagonal brace part (602) in the vertical direction is 6°-10°. The diagonal brace part (602) is fixedly connected to the lower part of the arc-shaped surface (102).

6. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 5, characterized in that, The second liner (6) and the fourth liner (8) are both provided with an assembly groove (16) at the top. The bottom inner wall of the assembly groove (16) is provided with a screw hole (15). The screw hole (15) obliquely penetrates the cover plate (1) and the bottom plate (2). The oblique angle of the screw hole (15) is 3°.

7. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 6, characterized in that, Stress plates (17) are fixedly connected to one side of the outer wall of the first liner (5) and the third liner (7). The top of the stress plate (17) is provided with a wave groove, and the width of the stress plate (17) gradually decreases along the direction close to the diagonal brace (602).

8. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 7, characterized in that, The buckle assembly includes a protrusion (9) fixedly connected to the outer wall of one side of the cover plate (1). A slot (10) is also provided on one side of the cover plate (1). The protrusion (9) on one side of the cover plate (1) cooperates with the slot (10) provided on the other side of the cover plate (1).

9. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 8, characterized in that, The cross-section of the protrusion (9) is an isosceles trapezoid. The protrusion (9) and the slot (10) on one side of the cover plate (1) are staggered. The size of the protrusion (9) gradually decreases along the direction close to the annular plate (3).

10. A segmented wear-resistant feeder for a semi-autogenous mill according to claim 9, characterized in that, The cover plate (1) has a second locking groove (14) and a first locking groove (13) on one side, and a first locking block (11) and a second locking block (12) on the other side. The cross-section of the first locking block (11) and the second locking block (12) is mountain-shaped. The peak of the first locking block (11) is higher than the peak of the second locking block (12). The first locking block (11) and the second locking block (12) on one side of the cover plate (1) cooperate with the first locking groove (13) and the second locking groove (14) on the other side of the cover plate (1).

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