An integrated grading and grinding device for enhancing the ball milling efficiency of hard-to-grind ores

Abstract

The present invention discloses a grading and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores, and relates to the technical field of lead-zinc ore dressing. The present invention comprises a base, on which an end cover assembly is rotatably arranged, and a transmission gear is fixed at one end of the outer wall of the end cover assembly, and the transmission gear is driven by an external motor; a ball mill assembly is fixed on the end cover assembly; a feed port is fixed at one end of the end cover assembly away from the transmission gear, and a spiral feeder is arranged in the feed port; a discharge port is fixed at one end of the end cover assembly opposite to the feed port; and a steel ball inlet is sealed and installed on the outer wall of the ball mill assembly. In the present invention, the ore can be graded and crushed multiple times by the ball mill assembly, which greatly improves the efficiency of grinding.

Description

Technical Field

[0001] The invention relates to the technical field of lead-zinc ore dressing, in particular to a classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores. Background Art

[0002] Lead-zinc ore refers to minerals rich in the metal elements lead and zinc. Lead and zinc are widely used in the electrical industry, mechanical industry, military industry, metallurgical industry, chemical industry, light industry and pharmaceutical industry. The first step in lead-zinc ore dressing is crushing and grinding. Crushing is to mechanically break large pieces of lead-zinc ore into smaller particles through different types of crushers, such as jaw crushers and impact crushers. Next, the crushed ore is further crushed to the ideal particle size through ball mills or autogenous mills. The quality of crushing directly affects the subsequent flotation effect.

[0003] The existing mineral processing equipment first uses the grinding equipment to work when grinding, and then uses the classification equipment to classify, so that the ore with qualified particle size is discharged, and the unqualified ore is sent back to the grinding equipment for further crushing. Its efficiency is low, and qualified ore cannot be discharged in time during grinding, which can easily cause over-crushing. In addition, due to the different sizes of ores when entering the ball mill, small ores are easily between large ores during grinding, affecting the ball milling efficiency.

[0004] In view of the above problems, the present invention provides an integrated classification and grinding device for enhancing the ball milling efficiency of hard-to-grind ores to solve the above problems. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solution: an integrated classification and grinding device for enhancing the ball milling efficiency of hard-to-grind ores, comprising:

[0006] A base, on which an end cover assembly is rotatably arranged, a transmission gear is fixed at one end of an outer wall of the end cover assembly, and the transmission gear is driven by an external motor;

[0007] A ball mill assembly, fixed on the end cover assembly;

[0008] A feed inlet is fixed at one end of the end cover assembly away from the transmission gear, and a screw feeder is arranged in the feed inlet;

[0009] A discharge port, fixed to an end of the end cover assembly opposite to the feed port;

[0010] A steel ball inlet, sealed and mounted on the outer wall of the ball mill assembly;

[0011] Among them, the ball mill assembly includes a cylinder body, on which a plurality of limit bolts are equidistantly arranged, a grading assembly is slidably arranged at one end of the plurality of limit bolts located in the cylinder body, a reflux assembly is arranged on the inner wall of the cylinder body, and a plurality of steel balls are placed in the plurality of grading assemblies.

[0012] Further, preferably, the end cover assembly includes a feed end cover and a discharge end cover, the feed end cover is located at one end of the ball mill assembly close to the feed port, the discharge end cover is located at one end of the ball mill assembly close to the discharge port, and guide surfaces are provided on the sides of the feed end cover and the discharge end cover close to each other, a plurality of baffles are fixed on the feed end cover, a plurality of discharge lining plates are fixed on the discharge end cover, and discharge ports are provided on the plurality of discharge lining plates.

[0013] Further, preferably, the grading component comprises:

[0014] The fixing columns are configured as four and fixed to the inner wall of the cylinder at equal distances;

[0015] An inner lining plate is slidably arranged on the limiting bolts and the four fixing columns, and a spring is arranged between the inner lining plate and the fixing columns;

[0016] The grading grooves are configured in plurality and are opened on the inner lining plate.

[0017] Further, preferably, every two grading components arranged axially of the cylinder form a group, the grading grooves in each group of grading components have the same size, and the grading grooves of the grading components arranged radially of the cylinder have the same size, the grading grooves of each group of the grading components increase sequentially from the feed port to the discharge port, and the size of the grading grooves close to the cylinder is the same as the size of the discharge port.

[0018] Further, preferably, the reflux component comprises:

[0019] A reflux plate, configured as a plurality of plates, circumferentially fixed in the cylinder and located between the plurality of grading components;

[0020] The baffle plates are configured in a plurality, arranged equidistantly along the axial direction of the cylinder, and located between every two grading assemblies;

[0021] The reflux switches are configured as a plurality of switches, which are equidistantly arranged between the reflux plates and along the axial direction of the cylinder.

[0022] Further, preferably, a plurality of discharge grooves 1 and 2 are respectively provided on the reflux plate and the baffle plate, and the sizes of the plurality of discharge grooves 1 and 2 are the same as the size of the discharge port, and the discharge groove 1 has an opening toward the direction of the cylinder.

[0023] Further, preferably, the reflux switch comprises:

[0024] A reflux door, hinged between the reflux plates, with a torsion spring disposed between the reflux plates, and a hinged position located at a side away from the feed port;

[0025] A plurality of magnetic columns are arranged, all of which are fixed on the upper end surface of the reflux gate and located on a side close to the feed port;

[0026] The storage bin is hinged on the inner wall of the cylinder at the upper end, and a magnetic disk corresponding to the position of the magnetic column is fixed to the bottom of one side of the storage bin, and the bottom of the storage bin is flush with an end surface of the discharge trough away from the cylinder.

[0027] Further, preferably, a group of grading components, multiple reflux plates, a baffle plate and a reflux switch arranged around the cylinder together constitute a grading space, and the ore is transported to the storage bin through the reflux plate and enters the previous grading space through the reflux switch.

[0028] Compared with the prior art, the present invention provides an integrated classification and grinding device for enhancing the ball milling efficiency of hard-to-grind ores, which has the following beneficial effects:

[0029] In the present invention, the ore can be ball-milled by the ball milling assembly, and the ore can be graded by the grading assembly during ball milling, thereby avoiding the problem that smaller ores are not easy to contact with steel balls. The grading can also avoid the excessive degree of crushing of the ore during ball milling, thereby affecting subsequent processing. The graded ore can be transported into the previous grading space through the reflux assembly, thereby greatly improving the ball milling efficiency of the ore. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The overall structure diagram of a grading and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0031] Figure 2 A schematic diagram of the structure of an end cover assembly of a grading and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0032] Figure 3 A schematic diagram of the structure of a ball mill assembly of a classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0033] Figure 4 A schematic diagram of the structure of a classification component of a classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0034] Figure 5 A schematic diagram of the structure of a reflux component of a classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0035] Figure 6A schematic diagram of the structure of the ore reflux state of a classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores;

[0036] In the figure: 1. base; 2. end cover assembly; 3. ball mill assembly; 4. transmission gear; 5. feed port; 6. discharge port; 7. steel ball inlet; 21. feed end cover; 22. baffle; 23. discharge end cover; 24. discharge lining plate; 25. guide surface; 31. cylinder; 32. limit bolt; 33. grading assembly; 34. reflux assembly; 35. steel ball; 331. fixing column; 332. inner lining plate; 333. grading trough; 341. reflux plate; 342. barrier plate; 343. discharge trough one; 344. discharge trough two; 345. reflux door; 346. magnetic column; 347. storage bin. DETAILED DESCRIPTION

[0037] Reference Figure 1-Figure 6 The present invention provides a technical solution: an integrated classification and grinding device for enhancing the ball milling efficiency of hard-to-grind ores, comprising:

[0038] A base 1, on which an end cover assembly 2 is rotatably arranged, a transmission gear 4 is fixed at one end of an outer wall of the end cover assembly 2, and the transmission gear 4 is driven by an external motor;

[0039] A ball mill assembly 3 is fixed on the end cover assembly 2;

[0040] A feed port 5 is fixed at one end of the end cover assembly 2 away from the transmission gear 4, and a screw feeder is arranged in the feed port 5;

[0041] A discharge port 6 is fixed at an end of the end cover assembly 2 opposite to the feed port 5;

[0042] A steel ball inlet 7, sealed and mounted on the outer wall of the ball mill assembly 3;

[0043] Among them, the ball mill assembly 3 includes a cylinder 31, on which a plurality of limit bolts 32 are equidistantly arranged, and a grading assembly 33 is slidably arranged at one end of the plurality of limit bolts 32 located in the cylinder 31, and a reflux assembly 34 is arranged on the inner wall of the cylinder 31, and a plurality of steel balls 35 are placed in the plurality of grading assemblies 33.

[0044] In this embodiment, the end cover assembly 2 includes a feed end cover 21 and a discharge end cover 23, the feed end cover 21 is located at one end of the ball mill assembly 3 close to the feed port 5, the discharge end cover 23 is located at one end of the ball mill assembly 3 close to the discharge port 6, and the feed end cover 21 and the discharge end cover 23 are both provided with a guide surface 25 on one side close to each other, a plurality of baffles 22 are fixed on the feed end cover 21, a plurality of discharge lining plates 24 are fixed on the discharge end cover 23, and a plurality of the discharge lining plates 24 are each provided with a discharge port.

[0045] As a preferred embodiment, the grading component 33 includes:

[0046] The fixing columns 331 are configured as four and fixed on the inner wall of the cylinder 31 at equal distances;

[0047] An inner lining plate 332 is slidably disposed on the limiting bolts 32 and the four fixing columns 331, and a spring is disposed between the inner lining plate 332 and the fixing columns 331;

[0048] The grading grooves 333 are configured in plurality and are opened on the inner lining plate 332 .

[0049] That is to say, when the ore is ball-milled, the inner lining plate 332 can be compressed by the spring, and then the ore is bounced up, thereby colliding with the falling steel ball 35, thereby greatly improving the crushing efficiency of the ore.

[0050] As a preferred embodiment, every two grading components 33 arranged axially on the cylinder 31 form a group, the grading grooves 333 in each group of grading components 33 have the same size, and the grading grooves 333 of the grading components 33 arranged radially on the cylinder 31 are also the same size, the grading grooves 333 of each group of the grading components 33 increase in size from the feed port 5 to the discharge port 6, and the size of the grading grooves 333 close to the cylinder 31 is the same as the size of the discharge port.

[0051] That is to say, when the degree of ore crushing is qualified, the ore can be discharged in time through the grading trough 333 close to the cylinder 31, so as to avoid over-crushing. When the degree of ore crushing is insufficient, it moves toward the discharge port 6 through the water flow, so as to be re-classified at the second grading trough 333. At this time, the classified ore that meets the crushing degree is discharged from the discharge port through the reflux component, and the ore that does not meet the crushing degree is sent to the previous grading trough 333 through the reflux component for continued crushing, avoiding over-crushing and avoiding the situation that small ores are difficult to crush between large ores.

[0052] As a preferred embodiment, the reflux component 34 includes:

[0053] The return plate 341 is configured as a plurality of plates, circumferentially fixed in the cylinder 31 and located between the plurality of the classification components 33;

[0054] The baffle plates 342 are configured as a plurality, are arranged equidistantly along the axial direction of the cylinder 31, and are located between every two grading assemblies 33;

[0055] The reflux switches are configured as a plurality of switches, which are equidistantly arranged between the reflux plates 341 and axially arranged along the cylinder 31 .

[0056] As a preferred embodiment, a plurality of discharge grooves 1 343 and a plurality of discharge grooves 2 344 are respectively provided on the return plate 341 and the baffle plate 342 , and the sizes of the plurality of discharge grooves 1 343 and a plurality of discharge grooves 2 344 are the same as the size of the discharge port, and the discharge groove 1 343 has an opening toward the direction of the cylinder 31 .

[0057] That is to say, after the ore is discharged from the grading trough 333, the ore that meets the crushing degree is transported to the discharge port from the discharge trough 1 343 and the discharge trough 2 344 with the water flow for discharge, and the ore that does not meet the crushing degree is transported through the reflux plate 341 and temporarily stored when passing through the reflux switch.

[0058] As a preferred embodiment, the reflux switch comprises:

[0059] The reflux door 345 is hinged between the reflux plates 341, and a torsion spring is arranged between the reflux plates 341, and the hinged position is located at a side away from the feed port 5;

[0060] The magnetic pillars 346 are configured as a plurality of magnetic pillars, all of which are fixed on the upper end surface of the reflux gate 345 and located on a side close to the feed port 5;

[0061] The storage bin 347 is hinged on the inner wall of the cylinder 31 at the upper end, and a magnetic disk corresponding to the position of the magnetic column 346 is fixed to the bottom of one side thereof, and the bottom of the storage bin 347 is flush with an end surface of the discharge trough 343 away from the cylinder 31.

[0062] As a preferred embodiment, a group of grading components 33, multiple reflux plates 341, a baffle plate 342 and a reflux switch arranged around the cylinder 31 together constitute a grading space. The ore is transported to the storage bin 347 through the reflux plate 341 and enters the previous grading space through the reflux switch.

[0063] That is to say, when the ore that does not meet the crushing degree is transported through the return plate 341, it is temporarily stored when passing through the storage bin 347. Then, when the return gate 345 rotates to the storage bin 347, the magnetic disk of the storage bin 347 is adsorbed by the magnetic column 346, so that the storage bin 347 is tilted to unload, and the temporarily stored ore flows into the previous grading space through the return gate 345 and is crushed again.

[0064] It should be noted that a return spring is provided at the hinge position between the storage bin 347 and the cylinder 31 .

[0065] Among them, the ore can be ball-milled by the ball mill component 3, and the ore can be classified by the classification component 33 during ball milling, thereby avoiding the problem that smaller ores are not easy to contact with the steel balls 35. In addition, classification can also avoid excessive crushing of the ore during ball milling, which affects subsequent processing, and the classified ore can be transported into the previous classification space through the reflux component 34, thereby greatly improving the ball milling efficiency of the ore.

[0066] Specifically, first, the steel balls 35 are put in through the steel ball inlet 7, and then the ore is put in through the feed port 5, and water is introduced for assistance. Then, the ore is crushed together by the steel balls 35 and the inner lining plate 332, and is classified by the grading trough 333, thereby avoiding the problem that the smaller ores are not easy to contact with the steel balls and improving the ball milling efficiency. Then, the ore is allowed to enter the grading space again for ball milling through the reflux component 34, and finally the qualified ore is discharged from the discharge port 6.

[0067] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated classification and grinding device for enhancing the ball milling efficiency of hard-to-grind ores, characterized by: include: A base, on which an end cover assembly is rotatably arranged, a transmission gear is fixed at one end of an outer wall of the end cover assembly, and the transmission gear is driven by an external motor; A ball mill assembly is fixed on the end cover assembly; The feed inlet is fixed at one end of the end cover assembly away from the transmission gear, and a spiral feeder is arranged in the feed inlet; The discharge port is fixed to the end of the end cover assembly opposite to the feed port; The steel ball inlet is sealed and installed on the outer wall of the ball mill assembly; The ball mill assembly includes a cylinder, a plurality of limit bolts are equidistantly arranged on the cylinder, a grading assembly is slidably arranged at one end of the plurality of limit bolts located in the cylinder, a reflux assembly is arranged on the inner wall of the cylinder, and a plurality of steel balls are placed in the plurality of grading assemblies; The reflux components include: The return plate is configured as a plurality of plates, circumferentially fixed in the cylinder and located between the plurality of classification components; The baffle plates are configured in a plurality and are arranged equidistantly along the axial direction of the cylinder and are located between every two grading assemblies; The reflux switches are configured as a plurality of switches, which are equidistantly arranged between the reflux plates and arranged along the axial direction of the cylinder; A plurality of discharge grooves 1 and 2 are respectively provided on the return plate and the baffle plate, and the sizes of the plurality of discharge grooves 1 and 2 are the same as the size of the discharge port, and the discharge groove 1 has an opening toward the cylinder body; The reflux switch includes: The return gate is hinged between the return plates, a torsion spring is arranged between the return plates, and the hinge position is located at a side away from the feed port; The magnetic columns are configured in multiple numbers and are all fixed on the upper end surface of the reflux gate and located on the side close to the feed inlet; The storage bin is hinged on the inner wall of the cylinder at the upper end, and a magnetic disk corresponding to the position of the magnetic column is fixed on the bottom of one side of the storage bin, and the bottom of the storage bin is flush with an end surface of the discharge trough away from the cylinder.

2. A classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores according to claim 1, characterized in that: The end cover assembly includes a feed end cover and a discharge end cover. The feed end cover is located at one end of the ball mill assembly close to the feed port, and the discharge end cover is located at one end of the ball mill assembly close to the discharge port. Guide surfaces are provided on the sides of the feed end cover and the discharge end cover close to each other. Multiple baffles are fixed on the feed end cover, and multiple discharge lining plates are fixed on the discharge end cover. Discharge ports are provided on the multiple discharge lining plates.

3. A classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores according to claim 1, characterized in that: The grading components include: The fixed columns are configured as four and fixed to the inner wall of the cylinder at equal distances; An inner lining plate is slidably arranged on the limit bolts and four fixing columns, and a spring is arranged between the inner lining plate and the fixing columns; The grading troughs are configured in multiple numbers and are opened on the inner lining plate.

4. A classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores according to claim 3, characterized in that: Every two grading components arranged axially on the cylinder form a group, the grading grooves in each group of grading components have the same size, and the grading grooves of the grading components arranged radially on the cylinder also have the same size. The grading grooves of each group of grading components increase in size from the feed port to the discharge port, and the size of the grading grooves close to the cylinder is the same as the size of the discharge port.

5. A classification and grinding integrated equipment for enhancing the ball milling efficiency of hard-to-grind ores according to claim 1, characterized in that: A group of grading components, multiple reflux plates, a baffle plate and a reflux switch arranged around the cylinder together constitute a grading space. The ore is transported to the storage bin through the reflux plate and enters the previous grading space through the reflux switch.

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