A graded energy-saving air flow mill and an ultrafine grinding method for ores

Abstract

The present invention relates to the technical field of graded energy-saving air flow mills, and discloses a graded energy-saving air flow mill and an ultra-fine grinding method for ore, comprising a mounting frame, a feed bin mounted inside the mounting frame, a feed pipe connected to the bottom of the feed bin, an air intake mechanism mounted inside the mounting frame, an upper air intake pipe connected to the outside of the air intake mechanism, a lower air intake pipe connected to the outside of the air intake mechanism, and an air flow injection mechanism connected to the other end of the lower air intake pipe. In the present invention, during the crushing process, a feed control mechanism can input crushed powder into the collection bin at a fixed speed, and when the mass of the powder inside the feed control mechanism increases, the speed at which the ore raw material enters the air flow crushing bin can be controlled, thereby ensuring the balance of the total amount of ore raw material inside the air flow crushing bin. Only when the total amount of ore raw material inside the air flow crushing bin remains balanced can the air flow injection mechanism perform efficient and high-quality crushing of the ore raw material.

Description

Technical Field

[0001] The invention relates to the technical field of grading energy-saving air flow mills, in particular to a grading energy-saving air flow mill and an ultrafine grinding method for ore. Background Art

[0002] Airflow milling equipment is a mechanical device that uses the kinetic energy of high-speed airflow to produce strong collision, friction and shearing of particles, thereby achieving ultra-fine grinding or fine classification of solid materials.

[0003] Chinese patent CN118437480B discloses an airflow pulverizing and classifying device, comprising a frame, an upper cover, a lower cover, an intermediate disk, and an elastic member. The lower cover is fixed to the frame, and the upper and lower covers are tightly fitted together to form an internal chamber. The top of the upper cover is provided with a feed pipe and a discharge pipe, and the bottom of the lower cover is provided with an air intake pipe. The intermediate disk is disposed within the internal chamber and connected to the upper cover via an elastic member, dividing the internal chamber into an upper pulverizing chamber and a lower gas chamber. Gas in the gas chamber enters the pulverizing chamber through a gas flow channel provided around the intermediate disk, pulverizing the material.

[0004] In the above patents and prior art, the air flow crushing equipment usually adds ore raw materials into the crushing chamber at a fixed speed. However, the size of the ore raw materials is often uneven, and the uneven ore raw materials require different crushing times, which leads to the uncontrollable total amount of ore raw materials in the crushing chamber, which not only affects the crushing effect but also affects the crushing efficiency and causes waste of resources. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a graded energy-saving air flow mill and an ultrafine grinding method for ore.

[0006] A graded energy-saving air flow mill comprises a mounting frame, a feed bin is mounted inside the mounting frame, a delivery pipe is connected to the bottom of the feed bin, an air intake mechanism is mounted inside the mounting frame, an upper air intake pipe is connected to the outside of the air intake mechanism, a lower air intake pipe is connected to the outside of the air intake mechanism, an air flow injection mechanism is connected to the other end of the lower air intake pipe, an air flow crushing bin is mounted inside the air flow injection mechanism, a material discharge control mechanism is connected to the top of the air flow crushing bin, a material discharge control mechanism is connected to the outside of the material discharge control mechanism, a material discharge pipe is connected to the other end of the material discharge pipe is connected to a collecting bin, an air flow pipe is connected to the outside of the collecting bin, and an air flow pipe is connected to the other end of the air flow pipe.

[0007] The air intake mechanism is connected to the interior of the airflow injection mechanism through the lower air intake pipe, the air intake mechanism is connected to the interior of the airflow crushing bin through the upper air intake pipe, the interior of the feed bin is connected to the interior of the material discharge control mechanism through the material delivery pipe, and the interior of the material discharge control mechanism is connected to the interior of the airflow crushing bin through the upper air intake pipe;

[0008] The ore raw materials inside the feed bin can enter the interior of the discharge control mechanism through the feed pipe, and the air intake mechanism can drive the ore raw materials inside the discharge control mechanism to enter the interior of the air flow crushing bin through the upper air intake pipe. The air intake mechanism can fill the air flow into the interior of the air flow injection mechanism through the lower air intake pipe. The air flow injection mechanism can crush the ore raw materials inside the air flow crushing bin, and the ore crushed inside the air flow crushing bin can enter the interior of the collection bin through the discharge control mechanism and the discharge pipe.

[0009] Preferably, the airflow injection mechanism includes an airflow injection bin, which is installed on the outside of the airflow crushing bin, and a plurality of airflow injection tubes are installed inside the airflow injection bin, an airflow connecting groove is opened inside the airflow injection tube, a connecting partition plate is slidably installed inside the airflow injection tube, the outside of the connecting partition plate is connected to a connecting telescopic rod, a partition plate mounting seat is installed inside the airflow injection tube, and a partition plate spring is installed outside the partition plate mounting seat.

[0010] Preferably, the plurality of airflow injection pipes are connected to the lower air inlet pipe through the airflow injection bin, the exterior of the communication partition plate is provided with a plurality of protrusions, the protrusions on the exterior of the communication partition plate are slidably mounted inside the airflow communication groove, and the interior of the airflow injection pipe is divided by the communication partition plate;

[0011] The air intake mechanism can inject airflow into the interior of the airflow injection tube through the lower air intake pipe, and the airflow inside the airflow injection tube can enter the interior of the airflow crushing bin through multiple airflow injection tubes.

[0012] Preferably, the exterior of the communicating partition plate is connected to the exterior of the partition plate mounting seat via a connecting telescopic rod and a partition plate spring, the protrusion length of the exterior of the communicating partition plate is less than the depth of the airflow communicating groove, and the two sides of the communicating partition plate can be connected via the airflow communicating groove;

[0013] When the outer portion of the connecting partition plate is in contact with both ends of the airflow connecting groove, the connecting partition plate can separate the interior of the airflow injection tube. When the connecting partition plate is located in the middle of the airflow connecting groove, the airflow can pass through the interior of the airflow connecting groove.

[0014] Preferably, the air flow crushing bin includes an ore crushing bin, which is fixedly installed inside the air flow injection bin, a lower limiting ring is installed inside the ore crushing bin, an air flow blade is installed on the top of the ore crushing bin, the bottom of the air flow blade is connected to the crushing limiting ring, the outside of the crushing limiting ring is connected to the upper limiting ring, and a discharge pipe is installed on the top of the ore crushing bin.

[0015] Preferably, the connection between the discharge pipe and the ore crushing bin is at the center of the top of the ore crushing bin, the connection between the upper air inlet pipe and the ore crushing bin is at the edge of the top of the ore crushing bin, and the air intake mechanism is connected to the interior of the ore crushing bin through the upper air inlet pipe;

[0016] When the air intake mechanism injects airflow into the interior of the ore crushing bin through the upper air intake pipe, it can drive the ore raw materials inside the feeding control mechanism to enter the interior of the ore crushing bin. When the upper air intake pipe injects airflow into the interior of the ore crushing bin, it can drive the airflow blades to rotate inside the ore crushing bin.

[0017] Preferably, the outer portions of the upper and lower limiting rings are both provided with a plurality of openings, the upper limiting ring is rotatably installed inside the ore crushing bin through the crushing limiting ring and the airflow blades, the crushing limiting ring is a conical structure, the interior of the crushing limiting ring is provided with a channel communicating with the discharge pipe, and the crushing limiting ring and the upper limiting ring separate the interior of the ore crushing bin;

[0018] When the air flow blade drives the crushing limit ring to rotate inside the ore crushing bin, the upper limit ring can rotate on the top of the lower limit ring. When the upper limit ring rotates on the top of the lower limit ring, the ore raw materials on the upper limit ring can be controlled to fall evenly to the bottom of the lower limit ring. The crushing limit ring can guide the crushed ore to the inside of the discharge pipe.

[0019] Preferably, the unloading control mechanism includes a feed pipe, the feed pipe is connected to the top of the discharge pipe, the top of the feed pipe is connected to a connecting bin, a transfer bin is installed inside the connecting bin, a powder filter is installed inside the transfer bin, a top connecting column is installed on the top of the transfer bin, a transmission connecting plate is installed on the top of the top connecting column, the outside of the transmission connecting plate is connected to a limiting cylinder, the inside of the limiting cylinder is installed with an airflow connecting cylinder, the outside of the airflow connecting cylinder is connected to the feed bin, and the bottom of the airflow connecting cylinder is connected to the upper air inlet pipe;

[0020] A plurality of openings are provided inside the limiting cylinder and the airflow connecting cylinder, and the openings on the limiting cylinder and the airflow connecting cylinder are staggered with each other.

[0021] Preferably, the bottom of the transfer bin is a conical structure, the top of the transfer bin is a circular structure, the interior of the transfer bin is separated by a powder filter, one end of the discharge pipe passes through the connecting bin and is connected to the interior of the transfer bin, the top of the top connecting column is connected to the limiting cylinder through a transmission connecting plate, and the powder filter can control the descending speed of the ore powder;

[0022] The ore powder inside the ore crushing bin can enter the transfer bin inside the connecting bin through the feed pipe. The ore powder inside the transfer bin passes through the powder filter and then enters the collecting bin from the discharge pipe. The change in the mass of the ore powder above the powder filter can drive the transfer bin to move up and down inside the connecting bin. When the transfer bin moves up and down, it can drive the limit cylinder to move up and down through the top connecting column and the transmission connecting plate.

[0023] A superfine grinding method for ore uses the above-mentioned graded energy-saving air flow mill.

[0024] Compared with the prior art, the present invention provides a graded energy-saving airflow mill and an ultrafine grinding method for ore, which has the following beneficial effects:

[0025] 1. This type of graded energy-saving air flow mill has a feeding control mechanism that can input the crushed powder into the collecting bin at a fixed speed during the crushing process. When the mass of the powder inside the feeding control mechanism increases, the speed at which the ore raw materials enter the air flow crushing bin can be controlled, thereby ensuring the balance of the total amount of ore raw materials inside the air flow crushing bin. Only when the total amount of ore raw materials inside the air flow crushing bin remains balanced can the air flow injection mechanism crush the ore raw materials efficiently and with high quality.

[0026] 2. This type of graded energy-saving air flow mill has multiple air flow injection pipes inside the air flow injection bin connected through the air flow injection bin, which can make the air flow speed discharged from multiple air flow injection pipes the same, and the connecting partition plate is installed inside the air flow injection pipe through the partition plate spring, which can make the air flow intensity discharged from the air flow injection pipe more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of a graded energy-saving airflow mill of the present invention. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of a graded energy-saving airflow mill of the present invention. Figure 2 ;

[0029] Figure 3 This is a schematic diagram of the three-dimensional structure of a mounting frame of a graded energy-saving airflow mill according to the present invention;

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the airflow crushing chamber of a graded energy-saving airflow mill of the present invention. Figure 1 ;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the airflow crushing chamber of a graded energy-saving airflow mill of the present invention. Figure 2 ;

[0032] Figure 6 This is a schematic diagram of the internal structure of the airflow crushing chamber of a graded energy-saving airflow mill of the present invention;

[0033] Figure 7 This is a schematic diagram of the three-dimensional structure of the airflow injection mechanism of a graded energy-saving airflow mill of the present invention;

[0034] Figure 8 This is a schematic diagram of the internal structure of the airflow injection mechanism of a graded energy-saving airflow mill of the present invention;

[0035] Figure 9 This is a schematic diagram of the internal structure of the air jet pipe of a graded energy-saving air jet mill of the present invention;

[0036] Figure 10 This is a schematic diagram of the explosion structure of the airflow crushing chamber of a graded energy-saving airflow mill of the present invention;

[0037] Figure 11 This is a schematic diagram of the three-dimensional structure of a material discharge control mechanism of a graded energy-saving air jet mill according to the present invention;

[0038] Figure 12 The figure is a schematic diagram of the exploded structure of the material feeding control mechanism of a graded energy-saving air flow mill according to the present invention.

[0039] 1. Mounting frame; 2. Feed bin; 3. Feed pipe; 4. Air intake mechanism; 5. Upper air intake pipe; 6. Lower air intake pipe; 7. Air flow injection mechanism; 71. Air flow injection bin; 72. Air flow injection pipe; 73. Air flow connecting groove; 74. Connecting partition plate; 75. Connecting telescopic rod; 76. Partition plate mounting seat; 77. Partition plate spring; 8. Air flow crushing bin; 81. Ore crushing bin; 82. Lower limiting ring; 83. Air flow blade; 84. Crushing limiting ring; 85. Upper limiting ring; 86. Discharge pipe; 9. Discharge control mechanism; 91. Feed pipe; 92. Connecting bin; 93. Transfer bin; 94. Powder filter; 95. Top connecting column; 96. Transmission connecting plate; 97. Limiting cylinder; 98. Air flow connecting cylinder; 10. Discharge pipe; 11. Collection bin; 12. Air flow pipe; 13. Vacuum pump. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] As introduced in the background technology, in order to solve the deficiencies in the prior art and to solve the above technical problems, the present application proposes a graded energy-saving air flow mill and an ultrafine grinding method for ores. Example 1

[0042] See also Figure 1 - Figure 12 A graded energy-saving air flow mill comprises a mounting frame 1, a feed bin 2 is mounted inside the mounting frame 1, a conveying pipe 3 is connected to the bottom of the feed bin 2, an air intake mechanism 4 is mounted inside the mounting frame 1, an upper air intake pipe 5 is connected to the outside of the air intake mechanism 4, a lower air intake pipe 6 is connected to the outside of the air intake mechanism 4, an air flow injection mechanism 7 is connected to the other end of the lower air intake pipe 6, an air flow crushing bin 8 is mounted inside the air flow injection mechanism 7, a material discharge control mechanism 9 is connected to the top of the air flow crushing bin 8, a material discharge control mechanism 9 is connected to the outside of the material discharge control mechanism 9, a material discharge pipe 10 is connected to the other end of the material discharge pipe 10 is connected to a collecting bin 11, an air flow pipe 12 is connected to the outside of the collecting bin 11, and an air flow pipe 12 is connected to the other end of the air flow pipe 12. An air pump 13 is connected to the other end of the air flow pump 13.

[0043] The air intake mechanism 4 is connected to the interior of the airflow injection mechanism 7 through the lower air intake pipe 6, and the air intake mechanism 4 is connected to the interior of the airflow crushing bin 8 through the upper air intake pipe 5. The interior of the feed bin 2 is connected to the interior of the material discharge control mechanism 9 through the material delivery pipe 3, and the interior of the material discharge control mechanism 9 is connected to the interior of the airflow crushing bin 8 through the upper air intake pipe 5;

[0044] The ore raw materials inside the feed bin 2 can enter the interior of the discharge control mechanism 9 through the feed pipe 3, the air intake mechanism 4 can drive the ore raw materials inside the discharge control mechanism 9 to enter the interior of the air flow crushing bin 8 through the upper air intake pipe 5, the air intake mechanism 4 can fill the air flow into the interior of the air flow injection mechanism 7 through the lower air intake pipe 6, the air flow injection mechanism 7 can crush the ore raw materials inside the air flow crushing bin 8, and the ore crushed inside the air flow crushing bin 8 can enter the interior of the collection bin 11 through the discharge control mechanism 9 and the discharge pipe 10.

[0045] During operation, the ore raw materials inside the feed bin 2 can enter the interior of the discharge control mechanism 9 through the feed pipe 3, and the air intake mechanism 4 can input airflow to the interior of the air flow crushing bin 8 through the upper air intake pipe 5. When the airflow passes through the interior of the upper air intake pipe 5, the ore raw materials inside the discharge control mechanism 9 can be brought into the interior of the air flow crushing bin 8. The air intake mechanism 4 can also input airflow to the interior of the air flow injection mechanism 7 through the lower air intake pipe 6. The air flow injection mechanism 7 can crush the ore raw materials inside the air flow crushing bin 8, and the ore raw materials crushed inside the air flow crushing bin 8 enter the interior of the discharge control mechanism 9. The discharge control mechanism 9 can The crushed ore powder can be input into the discharge pipe 10 at a constant speed, and the vacuum pump 13 can guide the ore raw materials in the discharge pipe 10 into the collecting bin 11. During the crushing process, the feeding control mechanism 9 can input the crushed powder into the collecting bin 11 at a fixed speed, and when the mass of the powder in the feeding control mechanism 9 increases, the speed at which the ore raw materials enter the air flow crushing bin 8 can be controlled, thereby ensuring the balance of the total amount of ore raw materials in the air flow crushing bin 8. Only when the total amount of ore raw materials in the air flow crushing bin 8 remains balanced can the air flow injection mechanism 7 perform efficient and high-quality crushing of the ore raw materials. Example 2

[0046] The difference from the above embodiment is that, please refer to Figure 1 - Figure 12 The airflow injection mechanism 7 includes an airflow injection bin 71, which is installed on the outside of the airflow crushing bin 8. A plurality of airflow injection tubes 72 are installed inside the airflow injection bin 71. An airflow connecting groove 73 is opened inside the airflow injection tube 72. A connecting partition plate 74 is slidably installed inside the airflow injection tube 72. The outside of the connecting partition plate 74 is connected to a connecting telescopic rod 75. A partition plate mounting seat 76 is installed inside the airflow injection tube 72, and a partition plate spring 77 is installed outside the partition plate mounting seat 76.

[0047] A plurality of airflow injection pipes 72 are connected to the lower air inlet pipe 6 through the airflow injection chamber 71. A plurality of protrusions are provided on the outside of the connecting partition plate 74. The protrusions on the outside of the connecting partition plate 74 are slidably mounted inside the airflow connecting groove 73. The interior of the airflow injection pipe 72 is divided by the connecting partition plate 74.

[0048] The air intake mechanism 4 can inject airflow into the interior of the airflow injection pipe 72 through the lower air intake pipe 6 , and the airflow inside the airflow injection pipe 72 can enter the interior of the airflow crushing bin 8 through multiple airflow injection pipes 72 .

[0049] The exterior of the connecting partition plate 74 is connected to the exterior of the partition plate mounting base 76 via a connecting telescopic rod 75 and a partition plate spring 77. The protrusion on the exterior of the connecting partition plate 74 is shorter than the depth of the airflow communication groove 73, so that both sides of the connecting partition plate 74 can communicate through the airflow communication groove 73.

[0050] When the outside of the connecting partition plate 74 is in contact with both ends of the airflow connecting groove 73 , the connecting partition plate 74 can separate the inside of the airflow injection tube 72 . When the connecting partition plate 74 is located in the middle part of the airflow connecting groove 73 , the airflow can pass through the inside of the airflow connecting groove 73 .

[0051] During operation, the air intake mechanism 4 can input the airflow into the interior of the airflow injection bin 71 through the lower air intake pipe 6. When the airflow enters the interior of the airflow injection bin 71, the pressure inside the airflow injection bin 71 gradually increases. When the pressure inside the airflow injection bin 71 is relatively low, the outside of the connecting partition plate 74 contacts one end of the airflow connecting groove 73. At this time, the connecting partition plate 74 can separate the interior of the airflow injection pipe 72. After the pressure inside the airflow injection bin 71 increases, the connecting partition plate 74 moves inside the airflow connecting groove 73 toward the center of the airflow injection bin 71. When the connecting partition plate 74 moves toward the center of the airflow injection bin 71, it can make the connecting telescopic rod 75 and the partition plate spring 77 are extended. At this time, the airflow inside the airflow injection bin 71 can enter the interior of the airflow crushing bin 8 through the airflow connecting groove 73 to crush the ore raw materials. When the pressure inside the airflow injection bin 71 is insufficient, the partition plate spring 77 contracts and can drive the connecting partition plate 74 to move to separate the interior of the airflow injection bin 71 again. The multiple airflow injection pipes 72 are connected through the airflow injection bin 71, which can make the airflow speed discharged from the multiple airflow injection pipes 72 the same, and the connecting partition plate 74 is installed inside the airflow injection pipe 72 through the partition plate spring 77 to make the airflow intensity discharged from the airflow injection pipe 72 more stable. Example 3

[0052] The difference from the above embodiment is that, please refer to Figure 1 - Figure 12 The air flow crushing bin 8 includes an ore crushing bin 81, which is fixedly installed inside the air flow injection bin 71. A lower limiting ring 82 is installed inside the ore crushing bin 81, and an air flow blade 83 is installed at the top inside the ore crushing bin 81. The bottom of the air flow blade 83 is connected to a crushing limiting ring 84, and the outside of the crushing limiting ring 84 is connected to an upper limiting ring 85. A discharge pipe 86 is installed at the top of the ore crushing bin 81.

[0053] The connection between the discharge pipe 86 and the ore crushing bin 81 is at the center of the top of the ore crushing bin 81. The connection between the upper air inlet pipe 5 and the ore crushing bin 81 is at the edge of the top of the ore crushing bin 81. The air intake mechanism 4 is connected to the interior of the ore crushing bin 81 through the upper air inlet pipe 5.

[0054] When the air intake mechanism 4 injects air flow into the interior of the ore crushing bin 81 through the upper air intake pipe 5, it can drive the ore raw materials inside the feeding control mechanism 9 into the interior of the ore crushing bin 81. When the upper air intake pipe 5 injects air flow into the interior of the ore crushing bin 81, it can drive the air flow blades 83 to rotate inside the ore crushing bin 81.

[0055] The outer portions of the upper limiting ring 85 and the lower limiting ring 82 are both provided with a plurality of openings. The upper limiting ring 85 is rotatably mounted inside the ore crushing bin 81 through the crushing limiting ring 84 and the airflow blades 83. The crushing limiting ring 84 is a conical structure. A channel is provided inside the crushing limiting ring 84 to communicate with the discharge pipe 86. The crushing limiting ring 84 and the upper limiting ring 85 separate the interior of the ore crushing bin 81.

[0056] When the air flow blade 83 drives the crushing limit ring 84 to rotate inside the ore crushing bin 81, the upper limit ring 85 can rotate on the top of the lower limit ring 82. When the upper limit ring 85 rotates on the top of the lower limit ring 82, the ore raw materials on the upper limit ring 85 can be controlled to fall evenly to the bottom of the lower limit ring 82. The crushing limit ring 84 can guide the crushed ore to the inside of the discharge pipe 86.

[0057] During operation, the airflow inside the upper air inlet pipe 5 can drive the ore raw materials inside the feeding control mechanism 9 to enter the interior of the ore crushing bin 81. When the airflow inside the upper air inlet pipe 5 enters the interior of the ore crushing bin 81, it can drive the airflow blades 83 to rotate inside the ore crushing bin 81. When the airflow blades 83 rotate, they can also drive the crushing limit ring 84 and the upper limit ring 85 to rotate. The ore raw materials inside the ore crushing bin 81 can fall onto the upper limit ring 85 along the outer side of the crushing limit ring 84. Then it enters the bottom of the lower limiting ring 82 through the openings on the upper limiting ring 85 and the lower limiting ring 82. When the upper limiting ring 85 rotates, the openings on the upper limiting ring 85 and the openings on the lower limiting ring 82 coincide with each other, and the ore raw materials can pass through, so that the ore raw materials can be transported into the bottom of the crushing limiting ring 84 for crushing, and the conical crushing limiting ring 84 can limit the shape of the crushing airflow inside the ore crushing bin 81, and can guide the crushed ore to the inside of the discharge pipe 86. Example 4

[0058] The difference from the above embodiment is that, please refer to Figure 1 - Figure 12The unloading control mechanism 9 includes a feeding pipe 91, which is connected to the top of the discharging pipe 86. The top of the feeding pipe 91 is connected to a connecting bin 92. A transfer bin 93 is installed inside the connecting bin 92. A powder filter 94 is installed inside the transfer bin 93. A top connecting column 95 is installed on the top of the transfer bin 93. A transmission connecting plate 96 is installed on the top of the top connecting column 95. The outside of the transmission connecting plate 96 is connected to a limiting cylinder 97. An airflow connecting cylinder 98 is installed inside the limiting cylinder 97. The outside of the airflow connecting cylinder 98 is connected to the feeding bin 2. The bottom of the airflow connecting cylinder 98 is connected to the upper air inlet pipe 5.

[0059] A plurality of openings are provided inside the limiting cylinder 97 and the airflow connecting cylinder 98 , and the openings on the limiting cylinder 97 and the airflow connecting cylinder 98 are staggered with each other.

[0060] The bottom of the transfer bin 93 is a conical structure, and the top of the transfer bin 93 is a circular structure. The interior of the transfer bin 93 is separated by a powder filter 94. One end of the discharge pipe 10 passes through the connecting bin 92 and is connected to the interior of the transfer bin 93. The top of the top connecting column 95 is connected to the limiting cylinder 97 through the transmission connecting plate 96. The powder filter 94 can control the descending speed of the ore powder.

[0061] The ore powder inside the ore crushing bin 81 can enter the transfer bin 93 inside the connecting bin 92 through the feed pipe 91. The ore powder inside the transfer bin 93 passes through the powder filter 94 and then enters the collecting bin 11 from the discharge pipe 10. The change in the mass of the ore powder above the powder filter 94 can drive the transfer bin 93 to move up and down inside the connecting bin 92. When the transfer bin 93 moves up and down, it can drive the limit cylinder 97 to move up and down through the top connecting column 95 and the transmission connecting plate 96.

[0062] During operation, the crushed ore powder enters the inside of the feed pipe 91 from the discharge pipe 86, and then enters the inside of the transfer bin 93 through the connecting bin 92. When the airflow and ore powder move upward inside the transfer bin 93, the ore powder will fall onto the powder filter 94 under the guidance of the circular structure on the top of the transfer bin 93. After the ore powder falls on the powder filter 94, it is transported through the powder filter 94 and enters the inside of the discharge pipe 10. When the ore raw material particles entering the ore crushing bin 81 are small, the crushing efficiency of the ore raw material is increased, and the amount of ore powder entering the transfer bin 93 will also increase. The amount of ore powder entering the transfer bin 93 When the flow rate increases, the speed at which the ore powder passes through the powder filter 94 remains unchanged, so that the mass of the ore powder on the powder filter 94 increases. At this time, the transfer bin 93 moves downward inside the connecting bin 92. When the transfer bin 93 moves downward, it can drive the top connecting column 95 to move downward. When the top connecting column 95 moves downward, it can move downward outside the airflow connecting tube 98 through the limiting tube 97. When the limiting tube 97 moves downward, the overlap of the openings on the limiting tube 97 and the airflow connecting tube 98 can be increased, thereby increasing the descending speed of the ore raw material inside the airflow connecting tube 98, and making the crushed ore raw material inside the ore crushing bin 81 in a balanced state. Example 5

[0063] A method for ultrafine grinding of ore, using a graded energy-saving airflow mill as described in Examples 1 to 4, comprises the following steps:

[0064] During operation, the ore material in the feed bin 2 can enter the interior of the discharge control mechanism 9 through the feed pipe 3;

[0065] The air intake mechanism 4 can input airflow into the air flow crushing bin 8 through the upper air intake pipe 5 to bring the ore raw materials inside the feeding control mechanism 9 into the air flow crushing bin 8;

[0066] The air intake mechanism 4 can also input airflow into the interior of the airflow injection mechanism 7 through the lower air intake pipe 6 to crush the ore material inside the airflow crushing chamber 8;

[0067] The ore raw materials crushed in the air flow crushing chamber 8 enter the interior of the material discharge control mechanism 9;

[0068] Furthermore, when the mass of the powder inside the feeding control mechanism 9 increases, the speed at which the ore raw materials enter the air flow crushing bin 8 can be controlled.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A graded energy-saving airflow mill, comprising a mounting frame, characterized in that: A feed bin is installed inside the mounting frame, a delivery pipe is connected to the bottom of the feed bin, an air intake mechanism is installed inside the mounting frame, an upper air intake pipe is connected to the outside of the air intake mechanism, a lower air intake pipe is connected to the outside of the air intake mechanism, the other end of the lower air intake pipe is connected to an air flow injection mechanism, an air flow crushing bin is installed inside the air flow injection mechanism, a material discharge control mechanism is connected to the top of the air flow crushing bin, a material discharge control mechanism is connected to the outside of the material discharge control mechanism, the other end of the material discharge pipe is connected to a collecting bin, the outside of the collecting bin is connected to an air flow pipe, and the other end of the air flow pipe is connected to an air pump; The air intake mechanism is connected to the interior of the airflow injection mechanism through the lower air intake pipe, the air intake mechanism is connected to the interior of the airflow crushing bin through the upper air intake pipe, the interior of the feed bin is connected to the interior of the material discharge control mechanism through the material delivery pipe, and the interior of the material discharge control mechanism is connected to the interior of the airflow crushing bin through the upper air intake pipe; The ore raw materials inside the feed bin can enter the interior of the discharge control mechanism through the feeding pipe, the air intake mechanism can drive the ore raw materials inside the discharge control mechanism into the interior of the air flow crushing bin through the upper air intake pipe, the air intake mechanism can fill the air flow into the interior of the air flow injection mechanism through the lower air intake pipe, the air flow injection mechanism can crush the ore raw materials inside the air flow crushing bin, and the crushed ore inside the air flow crushing bin can enter the interior of the collecting bin through the discharge control mechanism and the discharge pipe; The airflow injection mechanism includes an airflow injection bin, which is installed outside the airflow crushing bin. A plurality of airflow injection pipes are installed inside the airflow injection bin. Airflow communication grooves are opened inside the airflow injection pipes. A connecting partition plate is slidably installed inside the airflow injection pipes. The outside of the connecting partition plate is connected to a connecting telescopic rod. A partition plate mounting seat is installed inside the airflow injection pipes. A partition plate spring is installed outside the partition plate mounting seat. The plurality of airflow injection pipes are connected to the lower air inlet pipe through the airflow injection bin, the external portion of the connecting partition plate is provided with a plurality of protrusions, the protrusions on the external portion of the connecting partition plate are slidably mounted inside the airflow connecting groove, and the interior of the airflow injection pipe is divided by the connecting partition plate; The air intake mechanism can inject airflow into the interior of the airflow injection tube through the lower air intake pipe, and the airflow inside the airflow injection tube can enter the interior of the airflow crushing bin through multiple airflow injection tubes.

2. The hierarchical energy-saving airflow mill according to claim 1, characterized in that: The exterior of the communicating partition plate is connected to the exterior of the partition plate mounting base via a connecting telescopic rod and a partition plate spring. The protrusion length of the exterior of the communicating partition plate is less than the depth of the airflow communicating groove. The two sides of the communicating partition plate can be connected via the airflow communicating groove. When the outer portion of the connecting partition plate is in contact with both ends of the airflow connecting groove, the connecting partition plate can separate the interior of the airflow injection tube. When the connecting partition plate is located in the middle of the airflow connecting groove, the airflow can pass through the interior of the airflow connecting groove.

3. The hierarchical energy-saving airflow mill according to claim 2, characterized in that: The air flow crushing bin includes an ore crushing bin, which is fixedly installed inside the air flow injection bin. A lower limiting ring is installed inside the ore crushing bin, and an air flow blade is installed on the top of the ore crushing bin. The bottom of the air flow blade is connected to the crushing limiting ring, and the outside of the crushing limiting ring is connected to the upper limiting ring. A discharge pipe is installed on the top of the ore crushing bin.

4. The hierarchical energy-saving airflow mill according to claim 3, characterized in that: The connection between the discharge pipe and the ore crushing bin is at the center of the top of the ore crushing bin, the connection between the upper air inlet pipe and the ore crushing bin is at the edge of the top of the ore crushing bin, and the air intake mechanism is connected to the interior of the ore crushing bin through the upper air inlet pipe; When the air intake mechanism injects airflow into the interior of the ore crushing bin through the upper air intake pipe, it can drive the ore raw materials inside the feeding control mechanism to enter the interior of the ore crushing bin. When the upper air intake pipe injects airflow into the interior of the ore crushing bin, it can drive the airflow blades to rotate inside the ore crushing bin.

5. The hierarchical energy-saving airflow mill according to claim 4, characterized in that: The outer parts of the upper limiting ring and the lower limiting ring are both provided with a plurality of openings. The upper limiting ring is rotatably installed inside the ore crushing bin through the crushing limiting ring and the airflow blade. The crushing limiting ring is a conical structure. The interior of the crushing limiting ring is provided with a channel connected to the discharge pipe. The crushing limiting ring and the upper limiting ring separate the interior of the ore crushing bin. When the air flow blade drives the crushing limit ring to rotate inside the ore crushing bin, the upper limit ring can rotate on the top of the lower limit ring. When the upper limit ring rotates on the top of the lower limit ring, the ore raw materials on the upper limit ring can be controlled to fall evenly to the bottom of the lower limit ring. The crushing limit ring can guide the crushed ore to the inside of the discharge pipe.

6. The hierarchical energy-saving airflow mill according to claim 5, characterized in that: The unloading control mechanism includes a feed pipe, the feed pipe is connected to the top of the discharge pipe, the top of the feed pipe is connected to a connecting bin, a transfer bin is installed inside the connecting bin, a powder filter is installed inside the transfer bin, a top connecting column is installed on the top of the transfer bin, a transmission connecting plate is installed on the top of the top connecting column, the outside of the transmission connecting plate is connected to a limiting cylinder, the inside of the limiting cylinder is installed with an airflow connecting cylinder, the outside of the airflow connecting cylinder is connected to the feed bin, and the bottom of the airflow connecting cylinder is connected to the upper air inlet pipe; A plurality of openings are provided inside the limiting cylinder and the airflow connecting cylinder, and the openings on the limiting cylinder and the airflow connecting cylinder are staggered with each other.

7. The hierarchical energy-saving airflow mill according to claim 6, characterized in that: The bottom of the transfer bin is a conical structure, and the top of the transfer bin is a circular structure. The interior of the transfer bin is separated by a powder filter. One end of the discharge pipe passes through the connecting bin and is connected to the interior of the transfer bin. The top of the top connecting column is connected to the limiting cylinder through a transmission connecting plate. The powder filter can control the descending speed of the ore powder. The ore powder inside the ore crushing bin can enter the transfer bin inside the connecting bin through the feed pipe. The ore powder inside the transfer bin passes through the powder filter and then enters the collecting bin from the discharge pipe. The change in the mass of the ore powder above the powder filter can drive the transfer bin to move up and down inside the connecting bin. When the transfer bin moves up and down, it can drive the limit cylinder to move up and down through the top connecting column and the transmission connecting plate.

8. A method for ultrafine grinding of ore, characterized in that: A stepwise energy-saving jet mill according to any one of claims 1 to 7 is used, comprising the following steps: During operation, the ore raw materials in the feed bin can enter the interior of the discharge control mechanism through the feed pipe; The air intake mechanism can input air into the air flow crushing bin through the upper air intake pipe to bring the ore raw materials inside the discharge control mechanism into the air flow crushing bin; The air intake mechanism can also input air flow into the interior of the air flow injection mechanism through the lower air intake pipe to crush the ore raw materials inside the air flow crushing bin; The ore raw materials crushed in the air flow crushing chamber enter the inside of the material discharge control mechanism; Furthermore, when the mass of the powder inside the feeding control mechanism increases, the speed at which the ore raw materials enter the air flow crushing bin can be controlled.

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