CN116747980A - Stone breaker for mining engineering with secondary crushing screening function - Google Patents

Stone breaker for mining engineering with secondary crushing screening function Download PDF

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Publication number
CN116747980A
CN116747980A CN202310666934.8A CN202310666934A CN116747980A CN 116747980 A CN116747980 A CN 116747980A CN 202310666934 A CN202310666934 A CN 202310666934A CN 116747980 A CN116747980 A CN 116747980A
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CN
China
Prior art keywords
fixedly connected
rod
secondary crushing
frame
spiral
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Pending
Application number
CN202310666934.8A
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Chinese (zh)
Inventor
王永胜
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Individual
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Individual
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Priority to CN202310666934.8A priority Critical patent/CN116747980A/en
Publication of CN116747980A publication Critical patent/CN116747980A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00Crushing or disintegrating by gyratory or cone crushers
    • B02C2/10Crushing or disintegrating by gyratory or cone crushers concentrically moved; Bell crushers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00Crushing or disintegrating by roller mills
    • B02C4/02Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers

Abstract

The application belongs to the field of mining machinery, and particularly relates to a stone crusher with a secondary crushing and screening function for mining engineering. The device comprises a feeding mechanism, a primary crushing mechanism, a secondary crushing mechanism and a cooling mechanism, wherein the primary crushing mechanism comprises a motor, a spiral sleeve, a spiral rod striking rod, a pressing plate, a frame and a pressed baffle, the frame is fixedly connected with the pressed baffle, a discharge hole is formed in the frame, the striking rod is fixedly connected with the pressing plate, the spiral rod is communicated with the same axis of the striking rod, the spiral sleeve is fixedly connected with an output shaft of the motor, and the spiral sleeve is in threaded fit with the spiral rod; the cooling mechanism comprises a piston, the inside of the screw rod is hollow, the screw rod is in sliding connection with the piston, the piston is fixedly connected with an output shaft of the motor, the inside of the striking rod is hollow, and the striking rod is provided with a liquid inlet and a nozzle; the secondary crushing mechanism comprises a breaking wheel, and a discharge hole is arranged above the breaking wheel. The scheme can effectively solve the problems that the crushing structure is overheated and damaged and the service life is short when the crusher works for a long time.

Description

Stone breaker for mining engineering with secondary crushing screening function
Technical Field
The application belongs to the field of mining machinery, and particularly relates to a stone crusher with a secondary crushing and screening function for mining engineering.
Background
In a dressing plant, the crushing of mine stones is an indispensable preparation stage before the screening operation, firstly, most of mine stones processed by the dressing plant are useful minerals and gangue minerals closely connected together and are often formed into fine particles or even embedded into fine particles, only the fine particles are crushed and fully dissociated, the fine particles can be enriched by the existing physical dressing method, secondly, all the physical dressing methods are limited by granularity, the granularity is too coarse or too fine, and the effective screening cannot be carried out, and in each link of the dressing plant, the crushing of the mine stones is the most expensive procedure, which is an important component for the investment and production cost of the dressing plant, therefore, the basic task of the crushing operation of the mine stones is to provide proper selected materials for the screening operation, the work of the crushing process is good, and the technological and economic indexes of the dressing are directly influenced.
The existing ore crusher is an ore crushing device with a patent number of CN218690248U, and comprises a first box body, a feeding port, a crushing mechanism, a pushing mechanism, a screening net, a first drawer, a second box body and a communication port. A feeding port is fixedly formed above the first box body; the side wall of the first box body is fixedly connected with a second box body; the first box body is communicated with the upper end of the second box body through a communication port. One of the two crushing mechanisms is arranged below the feeding hole in the first box body, and the other crushing mechanism is arranged below the communication hole in the second box body; the screening net is arranged below the crushing mechanism in the first box body and is fixedly connected with the inner wall of the first box body; the pushing mechanism is arranged above the screening net and is flush with the communication port and used for pushing ore above the screening net into the communication port; the first drawer is slidably arranged at the lowest part of the first box body; the second drawer is slidably mounted at the lowest part of the second box body. The scheme can complete secondary crushing after ore size screening, does not need to manually carry out secondary crushing work, and is time-saving and labor-saving.
However, the problems are also existed, 1, the crushing mechanism of the scheme works for a long time, which can cause overheat damage and short service life of the crushing mechanism. 2. The breaking mechanism can generate a large amount of dust when breaking the stone, and the dust can influence the health of staff. 3. The stones are different in size during secondary crushing, and many stones may already be small enough to not need to be crushed, and this solution does not allow finer screening crushing, resulting in many stones becoming powder, increasing dust hazards and causing unnecessary waste.
Disclosure of Invention
The utility model provides a stone breaker for mining engineering with secondary crushing screening function for solve the breaker and work for a long time and can lead to crushing structure overheat damage, problem that life-span is short.
In order to achieve the aim, the scheme provides the stone crusher with the secondary crushing and screening functions for the mining engineering, which comprises a feeding mechanism, a primary crushing mechanism, a secondary crushing mechanism and a cooling mechanism,
the primary crushing mechanism comprises a motor, a spiral sleeve, a spiral rod impact rod, a pressing plate, a frame and a pressed baffle, wherein the frame is fixedly connected with the pressed baffle, a discharge hole is formed in the frame, the pressing plate is matched with the pressed baffle, the impact rod is fixedly connected with the pressing plate, the spiral rod is communicated with the coaxial center of the impact rod, the spiral sleeve is fixedly connected with an output shaft of the motor, and the spiral sleeve is in threaded fit with the spiral rod;
the feeding mechanism is arranged above the impact rod;
the cooling mechanism comprises a piston, the inside of the screw rod is hollow, the screw rod is in sliding connection with the piston, the piston is fixedly connected with an output shaft of the motor, the inside of the impact rod is hollow, the impact rod is provided with a liquid inlet and a nozzle, the nozzle is provided with a first one-way valve, and the liquid inlet is provided with a second one-way valve;
the secondary crushing mechanism comprises a destruction wheel, and the discharge port is arranged above the destruction wheel.
The principle of the scheme is as follows: when the screw sleeve rotates, the screw rod is driven to move upwards by the impact rod and the pressing plate to move upwards, the pressing plate and the pressed baffle form an extrusion crushing effect, stone is extruded and crushed, meanwhile, the piston is fixedly connected with an output shaft of the motor, when the screw rod moves upwards, the inner space of the screw rod is enlarged, suction force is generated, condensate is sucked into the cavity of the impact rod from the liquid inlet, and condensate is supplemented.
At this moment, the motor is reversing, the spiral shell is being driven to reverse, make the hob move down, the hob drives the striking pole to move down together, broken building stones can be followed the bin outlet of opening and fall down, simultaneously, along with the lower shift of hob, piston extrusion striking pole inner space, the condensate is extruded by the piston from the spout, the condensate water spray is on clamp plate and by the pressure baffle, it is too high to reduce the temperature to prevent clamp plate and by the pressure baffle operation temperature and lead to damaging, the condensate is from the spout blowout simultaneously, can effectually absorb the dust, prevent dust pollution in the air, influence staff's health, and piston extrusion strength is big, can form the water sword effect when the condensate is spouted, can help broken stone, increase work efficiency.
After the stone is screened for the first time, the stone is discharged from a discharge hole to a material plate, falls on a crushing wheel and is crushed for the second time, and the whole crushing and screening process is completed.
The beneficial effect of this scheme lies in: 1. the piston extrudes the cavity in the impact rod to spray condensate from the nozzle, and the condensate is effectively cooled by the pressure-supplying plate and the pressed baffle. 2. The condensate can also dissolve away the dust generated after the stone blocks are broken, so that dust pollution is reduced. 3. The piston extrusion power is big, and the condensate can form the water sword effect when spouting, can help broken stone, increases work efficiency.
Further, the motor driving device further comprises a driving bevel gear, a driven bevel gear, a main shaft and a two shafts, one end of the main shaft is fixedly connected with an output shaft of the motor, the other end of the main shaft is fixedly connected with the driving bevel gear, one end of the two shafts is fixedly connected with the spiral sleeve and the piston, the other end of the two shafts is fixedly connected with the driven bevel gear, and the driving bevel gear is meshed with the driven bevel gear. The motor can be placed on the frame better through the functions of changing direction and reducing rotation speed by the meshing of the bevel gears.
Further, the device further comprises a plurality of size screening mechanisms, each breaking wheel is provided with a plurality of blades, each size screening mechanism comprises a fan blade, a driving bevel gear, a driven bevel gear and three shafts, each driving bevel gear is fixedly connected with the corresponding spindle shaft, each driving bevel gear is meshed with each driven bevel gear, each driven bevel gear is fixedly connected with the corresponding three shaft, each three shaft is fixedly connected with each fan blade, each breaking wheel is matched with each fan blade, and each fan blade is matched with each discharge hole.
When the main shaft rotates, the driving bevel gear is driven to rotate, the driving bevel gear drives the driven bevel gear to rotate, then the three shafts rotate, the three shafts drive the fan blades to rotate, the fan blades are located below the discharge hole, stones in the discharge hole fall down and are required to pass through the front ends of the fan blades, the fan blades generate wind power, the stones are subjected to the same wind power, a plurality of breaking wheels are arranged, the breaking wheels are located below the fan blades and distributed at equal intervals, the number of the breaking wheels close to the fan blades is high, the number of the breaking wheels far away from the fan blades is low, smaller stones are contacted with the breaking wheels at a low speed, and the large stones are contacted with the breaking wheels at a high speed, so that the number of the breaking wheels is prevented from being too high, and the small stones are made into powder to cause waste.
Further, the device also comprises a baffle frame, wherein the baffle frame is fixedly connected with the frame, and the baffle frame is matched with the feeding hole. The baffle frame is positioned below the feeding hole, and can better convey stones into the pressing plate and the pressed baffle plate.
Further, still include the filter screen, the filter screen sets up in the below of destruction wheel. The filter screen sets up in the destruction wheel below, can effectually prevent the big stone that does not break to be on the filter screen, lets the destruction wheel continue the breakage.
Further, a collection bin for collecting concentrate is included, said collection bin being located below the filter screen. Concentrate enters the collecting box through the filter screen, so that the concentrate is convenient for staff to access.
Further, the device also comprises a condensing box, and the condensing box is communicated with the liquid inlet. Condensate is stored in the condensing box, so that the condensate is prevented from being used up.
Drawings
Figure 1 is a first crushing structure diagram of a stone crusher for mining engineering with a secondary crushing and screening function,
fig. 2 is a second crushing structure diagram of a stone crusher for mining engineering with a secondary crushing and screening function.
Detailed description of the preferred embodiments
The labels in the drawings of this specification include: 1. a baffle frame; 2. a pressed baffle; 3. a spout; 4. a pressing plate; 5. a condensing box; 6. a striker rod; 7. a screw rod; 8. a liquid inlet; 9. a spiral sleeve; 10. a piston; 11. a two-axis; 12. driven helical gears; 13. a driving helical gear; 14. a main shaft; 15. a motor; 16. a discharge port; 17. a filter screen; 18. a driven bevel gear; 19. a drive bevel gear; 20. a fan blade; 21. a ring breaking wheel; 22. and (5) collecting a box.
An example is substantially as shown in figure 1:
the utility model provides a stone breaker for mining engineering with secondary crushing screening function, including baffle 1, by pressing baffle 2, spout 3, clamp plate 4, condensation tank 5, striking pole 6, screw rod 7, inlet 8, spiral shell 9, piston 10, diaxon 11, driven helical gear 12, initiative helical gear 13, main shaft 14, motor 15 and bin outlet 16, striking pole 6 inside cavity, and full condensate, the top is equipped with spout 3, spout 3 aims at the feed inlet, spout 3 department is equipped with first check valve, condensate only goes out and does not go in, is equipped with inlet 8 on the striking pole 6, inlet 8 department is equipped with the second check valve, condensate only does not go in and out. The baffle frame 1 is arranged on the pressed baffle plate 2, so that stones can enter the crusher better, the pressed baffle plate 2 is fixed on the frame, the pressed baffle plate 2 is opposite to the pressing plate 4, when the impact rod 6 moves upwards, the distance between the pressing plate 4 and the pressed baffle plate 2 is reduced, extrusion is formed, the pressing plate 4 is fixedly connected with the impact rod 6, and a plurality of protruding points are arranged on the pressing plate 4 and used for crushing stones.
A plurality of condensate is stored in the condensing box 5, and the condensing box 5 is communicated with a liquid inlet 8 on the striking rod 6 to provide condensate for the inside of the striking rod 6. The screw rod 7 is fixedly connected with the striking rod 6, and the screw rod 7 is hollow and communicated with the striking rod 6. Screw rod 7 and screw sleeve 9 screw thread fit, screw sleeve 9 and diaxon 11 fixed connection, screw rod 7 inside still is equipped with piston 10, piston 10 and screw rod 7 sliding connection, piston 10 and diaxon 11 fixed connection. The driven bevel gear 12 is fixedly connected with the two shafts 11, and the driven bevel gear 12 is meshed with the driving bevel gear 13, so that the motor 15 is convenient to place in order to change the rotation direction. One end of the main shaft 14 is fixedly connected with the driving bevel gear 13, the other end is fixedly connected with the motor 15, and the motor 15 is fixed on the frame. The two shafts 11 are rotatably connected with the frame bearing. A discharge opening 16 is provided below the platen 4 and discharges through a pipe.
As shown in fig. 2:
the stone crusher with the secondary crushing and screening functions for the mining engineering comprises a discharge hole 16, a filter screen 17, a driven bevel gear 18, a driving bevel gear 19, fan blades 20, a breaking wheel 21 and a collecting box 22. The pipeline outlet of the discharge hole 16 is positioned above the screening mechanism, the screening mechanism is composed of a driven bevel gear 18, a driving bevel gear 19 and a fan blade 20, the fan blade 20 is fixedly connected with a triaxial, the fan blade 20 is fixedly connected with the driven bevel gear 18 coaxially, when the main shaft 14 rotates, the driving bevel gear 19 is driven to rotate, the driving bevel gear 19 drives the driven bevel gear 18 to rotate and then drives the triaxial to rotate, the triaxial drives the fan blade 20 to rotate, the fan blade 20 is positioned below the discharge hole 16, stones in the discharge hole 16 fall down and must pass through the front end of the fan blade 20, the fan blade 20 generates wind power, the stones are subjected to the same wind power, a plurality of breaking wheels 21 are arranged below the fan blade 20 and are distributed at equal intervals, the number of the breaking wheels 21 close to the fan blade 20 is high, the number of the breaking wheels 21 far away from the fan blade 20 is low, the small stones are blown to be contacted with the slow breaking wheels 21, and the large stones are contacted with the fast breaking wheels 21, so that the breaking wheels 21 are prevented from being too fast in the number of the breaking wheels, and the small stones are made into powder, and waste is caused.
The crushing wheel is equipped with 3, is located screening mechanism below, and the rotational speed of 3 crushing wheels slows down in proper order from the right to left. The collection bin 22 is used to collect the screened rock.
As shown in fig. 1 and 2:
when the screw sleeve 9 rotates, the screw sleeve 9 is acted by an upward force of the screw sleeve 9 to start to move upwards, the screw rod 7 moves upwards to drive the impact rod 6 and the pressing plate 4 to move upwards together, the pressing plate 4 and the pressed baffle plate 2 form an extrusion crushing effect, stone is extruded and crushed, meanwhile, the piston 10 is fixedly connected with the two shafts 11, when the screw rod 7 moves upwards, the inner space of the screw rod 7 is enlarged, suction force is generated, condensate in the condensing box 5 is sucked into the cavity of the impact rod 6, and condensate is supplemented.
At this moment, the motor 15 is reversed, the motor 15 drives the spiral sleeve 9 to be reversed, the spiral rod 7 moves downwards, the spiral rod 7 drives the impact rod 6 to move downwards together, broken stones can fall from the opened discharge outlet 16, simultaneously, along with the downward movement of the spiral rod 7, the piston 10 extrudes the inner space of the impact rod 6, condensate is extruded out of the nozzle 3 by the piston 10, condensate water sprays on the pressing plate 4 and the pressed baffle 2 to cool the pressing plate, damage caused by overhigh operation temperature of the pressing plate 4 and the pressed baffle 2 is prevented, condensate is sprayed out of the nozzle 3 simultaneously, dust can be effectively absorbed, dust pollution in air is prevented, the physical health of staff is influenced, the extruding force of the piston is large, a water knife effect can be formed when the condensate is sprayed out, broken stones can be helped, and the working efficiency is increased.
After the stone is screened for the first time, coming to the fan blade 20 from the discharge hole 16, the main shaft 14 rotates to drive the driving bevel gear 19 to rotate, the driving bevel gear 19 drives the driven bevel gear 18 to rotate, then drives the triaxial to drive the fan blade 20 to rotate, the fan blade 20 is positioned below the discharge hole 16, the stone in the discharge hole 16 is required to pass through the front end of the fan blade 20 when falling down, the fan blade 20 generates wind power, the stone is subjected to the same wind power, a plurality of breaking wheels 21 are arranged below the fan blade 20 and are distributed at equal intervals, the breaking wheels 21 close to the fan blade 20 rotate at a high speed, the breaking wheels 21 far away from the fan blade 20 rotate at a low speed, smaller stones are contacted with the low-speed breaking wheels 21, and large stones are contacted with the high-speed breaking wheels 21 to prevent the breaking wheels 21 from rotating at an excessive speed, so that the small stones are crushed into powder, and waste is caused.
Finally, all the stones fall on the filter screen 17, and the filter screen 17 filters the up-to-standard large stones, so that the large stones continue to be crushed by the crushing wheel, and the qualified stones roll into the collecting box 22 from the sliding, thus completing the whole crushing and screening process.
The foregoing is merely exemplary embodiments of the present application, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present application, and these should also be considered as the scope of the present application, which does not affect the effect of the implementation of the present application and the utility of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (7)

1. The stone crusher with the secondary crushing and screening functions for the mining engineering comprises a feeding mechanism, a primary crushing mechanism and a secondary crushing mechanism, and is characterized by further comprising a cooling mechanism,
the primary crushing mechanism comprises a motor, a spiral sleeve, a spiral rod impact rod, a pressing plate, a frame and a pressed baffle, wherein the frame is fixedly connected with the pressed baffle, a discharge hole is formed in the frame, the pressing plate is matched with the pressed baffle, the impact rod is fixedly connected with the pressing plate, the spiral rod is communicated with the coaxial center of the impact rod, the spiral sleeve is fixedly connected with an output shaft of the motor, and the spiral sleeve is in threaded fit with the spiral rod;
the feeding mechanism is arranged above the impact rod;
the cooling mechanism comprises a piston, the inside of the screw rod is hollow, the screw rod is in sliding connection with the piston, the piston is fixedly connected with an output shaft of the motor, the inside of the impact rod is hollow, the impact rod is provided with a liquid inlet and a nozzle, the nozzle is provided with a first one-way valve, and the liquid inlet is provided with a second one-way valve;
the secondary crushing mechanism comprises a destruction wheel, and the discharge port is arranged above the destruction wheel.
2. The stone crusher with the secondary crushing and screening function for mining engineering according to claim 1, further comprising a driving bevel gear, a driven bevel gear, a main shaft and a two shafts, wherein one end of the main shaft is fixedly connected with an output shaft of a motor, the other end of the main shaft is fixedly connected with the driving bevel gear, one end of the two shafts is fixedly connected with a spiral sleeve and a piston, the other end of the two shafts is fixedly connected with the driven bevel gear, and the driving bevel gear is meshed with the driven bevel gear.
3. The stone crusher with secondary crushing and screening functions for mining engineering according to claim 2, further comprising a plurality of size screening mechanisms, wherein the size screening mechanisms comprise fan blades, driving bevel gears, driven bevel gears and three shafts, the driving bevel gears are fixedly connected with the coaxial centers of the main shafts, the driving bevel gears are meshed with the driven bevel gears, the driven bevel gears are fixedly connected with the coaxial centers of the three shafts, the three shafts are fixedly connected with the fan blades, the damage wheels are matched with the fan blades, and the fan blades are matched with the discharge holes.
4. The stone crusher with the secondary crushing and screening function for mining engineering according to claim 1, further comprising a baffle frame, wherein the baffle frame is fixedly connected with the frame, and the baffle frame is matched with the feeding hole.
5. A stone breaker for mining engineering having a secondary crushing and screening function according to claim 1, further comprising a screen, the screen being arranged below the breaking wheel.
6. A stone breaker for mining engineering with a secondary crushing and screening function according to claim 5, characterized by a collecting box for collecting concentrate, said collecting box being located below the screen.
7. A stone breaker for mining engineering with secondary crushing and screening function according to claim 1, further comprising a condensing box, wherein the condensing box is communicated with the liquid inlet.
CN202310666934.8A 2023-06-07 2023-06-07 Stone breaker for mining engineering with secondary crushing screening function Pending CN116747980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310666934.8A CN116747980A (en) 2023-06-07 2023-06-07 Stone breaker for mining engineering with secondary crushing screening function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310666934.8A CN116747980A (en) 2023-06-07 2023-06-07 Stone breaker for mining engineering with secondary crushing screening function

Publications (1)

Publication Number Publication Date
CN116747980A true CN116747980A (en) 2023-09-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310666934.8A Pending CN116747980A (en) 2023-06-07 2023-06-07 Stone breaker for mining engineering with secondary crushing screening function

Country Status (1)

Country Link
CN (1) CN116747980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117504977A (en) * 2024-01-04 2024-02-06 山东济钢环保新材料有限公司 Ore screening equipment for mining and processing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117504977A (en) * 2024-01-04 2024-02-06 山东济钢环保新材料有限公司 Ore screening equipment for mining and processing
CN117504977B (en) * 2024-01-04 2024-03-26 山东济钢环保新材料有限公司 Ore screening equipment for mining and processing

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