Metal ore pretreatment device and system

Abstract

The invention provides a metal ore pretreatment device and system, belongs to the field of metal ore pretreatment, is used for solving the problem that in the prior art, large noise is generated when metal ore is ground, and comprises a base, a grinding mechanism and an air supply mechanism; a grinding cavity is formed between an upper grinding disc and a lower grinding disc of the grinding mechanism, and the grinding cavity is divided into a first grinding sub-cavity, a second grinding sub-cavity and a third grinding sub-cavity; on one hand, the air supply mechanism is used for assisting metal ore particles to be transferred in the first grinding sub-cavity, the second grinding sub-cavity and the third grinding sub-cavity in sequence, residues of the metal ore particles or powder in the grinding cavities are reduced, and the effect of the grinding process is accelerated; on the other hand, the effect of drying the metal ore is achieved; besides, the metal ore particles are ground for three times, so that all the metal ore particles can be ground into powder, no metal ball participates in the whole process, the noise in the grinding process is reduced, and the service life of the metal ore pretreatment device is prolonged.

Description

Technical Field

[0001] The present invention belongs to the field of pretreatment of metal ores, and particularly relates to a metal ore pretreatment device and system. Background Art

[0002] When exploring metal ores, it is necessary to measure the metal content of the ores in the metal ores to know the mineral content in the metal ores, and then determine whether it is necessary to excavate the metal ores. In the process of knowing the mineral content in the metal ores, it is necessary to pretreat the metal ores. The main purpose of the pretreatment is to treat the ores by physical or chemical methods to improve the efficiency and effect of the subsequent smelting or extraction process. Traditional metal ore pretreatment methods include steps such as crushing and grinding. However, these methods have some problems in practical applications, such as high energy consumption, low processing efficiency, environmental pollution, etc.

[0003] When grinding metal ores, an ore ball mill is usually used. The working principle of the ore ball mill is based on the fact that the metal ores are subjected to the collision and friction of steel balls during the ball milling process, so as to realize the grinding of the metal ores. Specifically, the ore ball mill includes a grinding cylinder, and a plurality of steel balls are arranged in the grinding cylinder. After the metal ores are put into the grinding cylinder, the driving mechanism is used to drive the grinding cylinder to rotate, and then drive the steel balls to continuously collide and rub with the metal ores. However, when grinding the metal ores in this way, since collisions will occur between the steel balls and the metal ores, between the metal ores and the inner wall of the grinding cylinder, and between the steel balls and the inner wall of the grinding cylinder, the ore ball mill will generate relatively large noise, which will affect the hearing of the operators after long-term use; in addition, during the collision process, the wear of the inner wall of the grinding cylinder will also be aggravated, resulting in a rapid reduction in the service life of the ore ball mill. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a metal ore pretreatment device and system for solving the problem of relatively large noise generated during the grinding of metal ores in the prior art.

[0005] To achieve the above and other related objectives, the present invention provides a metal ore pretreatment device, comprising: a base; a grinding mechanism disposed on the base for grinding metal ore; a blowing mechanism disposed on the base, with the air outlet of the blowing mechanism connected to the first feed inlet of the grinding mechanism, and the blowing mechanism for delivering hot air into the grinding mechanism; wherein, the grinding mechanism includes an upper grinding disc fixedly connected to the base and provided with a first feed inlet, a lower grinding disc rotatably connected to the base, a discharge assembly disposed on the base and surrounding the outer side of the lower grinding disc, and a driving assembly disposed on the base for driving the lower grinding disc to rotate; a conical grinding chamber is formed between the upper grinding disc and the lower grinding disc, with the small end of the grinding chamber facing the upper grinding disc and the small end of the grinding chamber communicating with the first feed inlet; the grinding chamber includes a first grinding sub-chamber, a second grinding sub-chamber, and a third grinding sub-chamber arranged in sequence from the small end to the large end of the grinding chamber; the maximum gap between the upper grinding disc and the lower grinding disc in the first grinding sub-chamber is greater than the maximum gap in the third grinding sub-chamber; the first grinding surface of the upper grinding disc in the first grinding sub-chamber is parallel to the second grinding surface of the upper grinding disc in the third grinding sub-chamber.

[0006] Optionally, a plurality of first grinding bars are spaced on the first grinding surface of the upper grinding disc; a plurality of second grinding bars are spaced on the second grinding surface of the upper grinding disc; a plurality of third grinding bars are spaced on the third grinding surface of the lower grinding disc in the first grinding sub-chamber; a plurality of fourth grinding bars are provided on the fourth grinding surface of the lower grinding disc in the third grinding sub-chamber; the plurality of first grinding bars and the plurality of third grinding bars extend from the small end to the large end of the first grinding sub-chamber; the plurality of second grinding bars and the plurality of fourth grinding bars extend from the small end to the large end of the third grinding sub-chamber.

[0007] Optionally, the height of the first grinding bar protruding from the first grinding surface is greater than the height of the second grinding bar protruding from the second grinding surface.

[0008] Optionally, the first grinding bars and the second grinding bars are arranged in a staggered manner at the bottom of the upper grinding disc; and / or, the height of the first grinding bar protruding from the first grinding surface is greater than the height of the third grinding bar protruding from the third grinding surface.

[0009] Optionally, the grinding mechanism further includes a first feed pipe, a second feed pipe, an air inlet pipe, and a first pipe joint; the first feed pipe is connected to the first feed inlet; the inner diameter of the air inlet pipe is less than or equal to the inner diameter of the first feed pipe and greater than the outer diameter of the second feed pipe; the air inlet pipe is sleeved on the second feed pipe, with one end of the air inlet pipe connected to the second feed pipe and the other end connected to the first feed pipe through the first pipe joint; an air inlet for connecting to the air outlet of the blowing mechanism is further provided at the connection end of the air inlet pipe and the second feed pipe.

[0010] Optionally, a spiral air guide member for guiding hot air to flow towards the first feed pipe is provided on the inner side wall of the air inlet pipe.

[0011] Optionally, the driving assembly includes a driving motor, a first pulley, a second pulley and a timing belt; the driving motor is arranged on the base, the first pulley is connected to the driving motor, the second pulley is connected to the bottom of the lower grinding disc, and the timing belt is sleeved on the first pulley and the second pulley; and / or, a limiting disc is arranged at the bottom of the lower grinding disc; the grinding mechanism further includes at least three rotating columns and at least three limiting members, the rotating columns and the limiting members are arranged in one-to-one correspondence, at least three rotating columns are arranged on the base at intervals, and the limiting members are rotatably arranged on the rotating columns; a limiting groove is arranged on the limiting member, and the limiting disc is slidably limited in the limiting groove.

[0012] Optionally, the discharging assembly includes two material receiving members, two first discharging pipes, a second discharging pipe and a receiving bag; the first discharging pipes and the material receiving members are arranged in one-to-one correspondence; the upper end of the material receiving member is arc-shaped, and the lower end gradually converges. A material receiving cavity is arranged in the material receiving member, and the material receiving cavity has a material receiving port and a second discharging port. The material receiving port is connected to the first discharging port of the third grinding sub-cavity, the second discharging port is connected to the first discharging pipe, the ends of the two first discharging pipes far away from the second discharging port are connected to the second discharging pipe, and the receiving bag is connected to the end of the second discharging pipe far away from the first discharging pipe; the inner side wall of the material receiving member is slidably connected to the lower grinding disc, and the outer side wall of the material receiving member is fixedly connected to the upper grinding disc.

[0013] Optionally, a first groove for accommodating the inner side wall of the material receiving member is arranged on the outer side wall of the lower grinding disc, the opening direction of the first groove faces the bottom of the lower grinding disc, and a second groove is arranged on the inner side wall of the first groove; a first protrusion for accommodating the second groove is arranged on the inner side wall of the material receiving member.

[0014] On the other hand, the present invention also provides a metal ore pretreatment system, including the metal ore pretreatment device as described above, and further including a crushing mechanism, a screening mechanism and a lifting mechanism; the crushing mechanism includes a second feed port and two relatively arranged crushing rollers, and the crushing mechanism is used for crushing metal ore raw materials into metal ore particles; the screening mechanism is arranged below the crushing mechanism, and is used for screening the metal ore particles crushed by the crushing mechanism, and transferring the metal ore particles with qualified particle sizes into the metal ore pretreatment device for pretreatment and conveying the metal ore particles with unqualified particle sizes into the lifting mechanism; the lifting mechanism is used for conveying the metal ore particles with unqualified particle sizes into the crushing mechanism for secondary crushing.

[0015] As described above, a metal ore pretreatment device and system of the present invention have at least the following beneficial effects: By providing a air supply mechanism and a grinding mechanism, a grinding chamber is provided between the upper grinding disc and the lower grinding disc of the grinding mechanism, and the grinding chamber is divided into a first grinding sub-chamber, a second grinding sub-chamber, and a third grinding sub-chamber; The air supply mechanism is used to assist the transfer of metal ore particles in the first grinding sub-chamber, the second grinding sub-chamber, and the third grinding sub-chamber in sequence, reducing the residue of metal ore particles or powder in the grinding chamber. On the other hand, it can also accelerate the mutual rubbing between metal ore particles to accelerate the grinding process; On the other hand, it also plays a role in drying the metal ore to reduce the water content in the metal ore powder after the metal ore is processed into metal ore powder, facilitating the subsequent determination of the metal content of the metal ore powder; In addition, the metal ore particles are ground three times, which can ensure that all metal ore particles can be ground into powder, and there is no participation of metal balls throughout the process, reducing the noise during the grinding process and increasing the service life of the metal ore pretreatment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows a schematic structural diagram of a metal ore pretreatment device of the present invention.

[0017] Figure 2 Shows a schematic structural diagram of a metal ore pretreatment device of the present invention with the base and the air supply mechanism omitted.

[0018] Figure 3 Shows a schematic structural diagram of a metal ore pretreatment device of the present invention with the base, the air supply mechanism, and the discharge assembly omitted.

[0019] Figure 4 Shows a schematic cross-sectional view of the upper grinding disc, the lower grinding disc, and the discharge assembly of a metal ore pretreatment device of the present invention at a certain angle.

[0020] Figure 5 Shown as Figure 4 An enlarged schematic view of part A in

[0021] Figure 6 Shows a schematic structural diagram of the lower grinding disc of a metal ore pretreatment device of the present invention at a certain angle.

[0022] Figure 7 Shows a schematic structural diagram of the upper grinding disc of a metal ore pretreatment device of the present invention at a certain angle.

[0023] Figure 8 Shows a schematic cross-sectional structural diagram of the second feed pipe, the air inlet pipe, the spiral air guiding member, and the first pipe joint of a metal ore pretreatment device of the present invention at a certain angle.

[0024] Figure 9It shows a schematic cross-sectional view at an angle of the air inlet pipe of a metal ore pretreatment device of the present invention.

[0025] Figure 10 It shows a schematic partial structural view at an angle of the discharge assembly of a metal ore pretreatment device of the present invention.

[0026] Figure 11 It shows a schematic structural view at an angle of a metal ore pretreatment system of the present invention.

[0027] Figure 12 It shows another angle of a metal ore pretreatment system of the present invention, and the front side plate of the crushing mechanism is omitted in the schematic view.

[0028] Reference numeral description: 1. Base, 2. Grinding mechanism, 21. Upper grinding disc, 211. First feed inlet, 212. First grinding strip, 213. Second grinding strip, 22. Lower grinding disc, 221. Third grinding strip, 222. Fourth grinding strip, 223. Limiting disc, 224. First groove, 2241. Second groove, 23. Discharge assembly, 231. Material receiving part, 2311. Material receiving cavity, 2312. Inner side wall, 23121. First protrusion, 2313. Outer side wall, 232. First discharge pipe, 233. Second discharge pipe, 24. Driving assembly, 241. Driving motor, 242. First pulley, 243. Second pulley, 244. Timing belt, 25. Grinding cavity, 251. First grinding sub-cavity, 252. Second grinding sub-cavity, 253. Third grinding sub-cavity, 26. First feed pipe, 27. Second feed pipe, 28. Air inlet pipe, 281. Air inlet, 282. Spiral air guiding part, 29. First pipe joint, 30. Rotating column, 31. Limiting part, 311. Limiting groove, 3. Air supply mechanism, 4. Crushing mechanism, 5. Screening mechanism, 6. Lifting mechanism. Detailed implementation manners

[0029] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0030] Please refer to all the following drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have any substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present invention can be implemented.

[0031] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment only.

[0032] Please refer to Figures 1-5 , the present invention provides a metal ore pretreatment device, including: a base 1; a grinding mechanism 2 provided on the base 1, and the grinding mechanism 2 is used for grinding metal ore; a blowing mechanism 3 provided on the base 1, and the air outlet of the blowing mechanism 3 is connected to the first feed port 211 of the grinding mechanism 2, and the blowing mechanism 3 is used for delivering hot air into the grinding mechanism 2; The grinding mechanism 2 includes an upper grinding disc 21 fixedly connected to the base 1 and provided with a first feed port 211, a lower grinding disc 22 rotatably connected to the base 1, a discharge assembly 23 provided on the base 1 and annularly arranged on the outer side surface of the lower grinding disc 22, and a driving assembly 24 provided on the base 1 for driving the lower grinding disc 22 to rotate; a conical grinding cavity 25 is formed between the upper grinding disc 21 and the lower grinding disc 22, the small end of the grinding cavity 25 is arranged facing the upper grinding disc 21, and the small end of the grinding cavity 25 is communicated with the first feed port 211; the grinding cavity 25 includes a first grinding sub-cavity 251, a second grinding sub-cavity 252, and a third grinding sub-cavity 253 arranged in sequence from the small end to the large end of the grinding cavity 25; the maximum gap between the upper grinding disc 21 and the lower grinding disc 22 in the first grinding sub-cavity 251 is greater than the maximum gap in the third grinding sub-cavity 253; the first grinding surface of the upper grinding disc 21 located in the first grinding sub-cavity 251 is parallel to the second grinding surface of the upper grinding disc 21 located in the third grinding sub-cavity 253.

[0033] Specifically, the bottom of the upper grinding disc 21 is a conical structure. The first feed inlet 211 is arranged at the center of the top of the upper grinding disc 21 and penetrates through the upper grinding disc 21. The top of the lower grinding disc 22 is also a conical structure. The bottom of the upper grinding disc 21 and the top of the lower grinding disc 22 form a grinding cavity 25. After the upper grinding disc 21 is sectioned along a plane parallel to the central axis of the upper grinding disc 21, the first grinding surface and the second grinding surface of the upper grinding disc 21 are arranged parallel to each other, and the first grinding surface and the second grinding surface are connected by an arc transition surface in the second grinding sub-cavity 252. The air supply mechanism 3 is a mechanism for generating hot air, and its internal structure can be composed of a fan, a heating wire, etc., which is used to generate hot air and convey it into the first feed inlet 211 of the upper grinding disc 21 through an air supply pipe. The air supply mechanism 3 can also adopt other structural forms, and this embodiment does not limit this.

[0034] During use, metal ore particles enter the grinding cavity 25 through the first feed inlet 211. At the same time, the air supply mechanism 3 generates hot air, which enters the grinding cavity 25 together with the metal ore particles. The metal ore particles are ground for the first time in the first grinding sub-cavity 251. After the first grinding is completed, the ground metal ore particles enter the second grinding sub-cavity 252 under the action of hot air and their own gravity. At this time, due to the action of hot air, the metal ore particles rub against each other in the second grinding sub-cavity 252, forming the second grinding. And during the grinding process, they enter the third grinding sub-cavity 253 together with the hot air for the third grinding, so that the metal ore particles are ground into metal ore powder. In this way, the pretreatment work of metal ore is completed. After the metal ore is ground into metal ore powder, the metal ore powder can be sent into the extraction mechanism to analyze the metal content in the metal ore and complete the detection work of the metal content in the metal ore.

[0035] In this embodiment, the air supply mechanism 3 is used on the one hand to drive the metal ore particles to move from the first feed inlet 211 to the first grinding sub-cavity 251, the second grinding sub-cavity 252 and the third grinding sub-cavity 253 in sequence, that is, it plays a role in assisting the transfer of metal ore particles and reducing the residue of metal ore particles or powder in the grinding cavity 25; on the other hand, it can also play a role in accelerating the rubbing between metal ore particles to accelerate the grinding process; on the one hand, it also plays a role in drying the metal ore to reduce the water content in the metal ore powder after the metal ore is processed into metal ore powder, which is convenient for the subsequent determination of the metal content of the metal ore powder. In addition, after three grindings of the metal ore particles, it can ensure that all metal ore particles can be ground into powder, and there is no participation of metal balls throughout the process, reducing the noise during the grinding process and increasing the service life of the metal ore pretreatment device.

[0036] Please refer to Figures 6-7, in one implementation, a plurality of first grinding bars 212 are arranged at intervals on the first grinding surface of the upper grinding disc 21; a plurality of second grinding bars 213 are arranged at intervals on the second grinding surface of the upper grinding disc 21; a plurality of third grinding bars 221 are arranged at intervals on the third grinding surface of the lower grinding disc 22 located in the first grinding sub-chamber 251; a plurality of fourth grinding bars 222 are arranged on the fourth grinding surface of the lower grinding disc 22 located in the third grinding sub-chamber 253; the plurality of first grinding bars 212 and the plurality of third grinding bars 221 extend from the small end of the first grinding sub-chamber 251 to the large end of the first grinding sub-chamber 251; the plurality of second grinding bars 213 and the plurality of fourth grinding bars 222 extend from the small end of the third grinding sub-chamber 253 to the large end of the third grinding sub-chamber 253.

[0037] The first grinding bars 212 and the second grinding bars 213 are strip-shaped structures protruding from the bottom surface of the upper grinding disc 21, and the third grinding bars 221 and the fourth grinding bars 222 are also strip-shaped structures protruding from the top surface of the lower grinding disc 22. A first groove 224 structure for accommodating the third grinding bars 221 is formed between two adjacent first grinding bars 212 arranged adjacent to each other, and a second groove structure for accommodating the fourth grinding bars 222 is formed between two adjacent second grinding bars 213 arranged corresponding to each other. A third groove structure for accommodating the first grinding bars 212 is formed between two adjacent third grinding bars 221 arranged corresponding to each other, and a fourth groove structure for accommodating the second grinding bars 213 is formed between two adjacent fourth grinding bars 222 arranged adjacent to each other. When the first grinding bars 212 and the third grinding bars 221 are in contact, at this time, the metal particles can move in the direction away from the first feed port 211 under the action of their own gravity and the hot air of the air supply mechanism 3 by using the first groove 224 structure and the third groove structure; when the first grinding bars 212 are in the third groove structure formed between two adjacent third grinding bars 221, and when the third grinding bars 221 are in the first groove 224 structure formed between two adjacent first grinding bars 212, the first grinding bars 212 and the third groove structure, the third grinding bars 221 and the first groove 224 structure realize the extrusion of metal ore particles, so as to achieve the effect of grinding metal ore particles. Similarly, the functions of the second grinding bars 213 and the fourth grinding bars 222 are the same, and this embodiment will not be elaborated herein.

[0038] In one implementation, the height of the first grinding bars 212 protruding from the first grinding surface is greater than the height of the second grinding bars 213 protruding from the second grinding surface; that is, the particle size of the metal ore particles processed in the first grinding sub-chamber 251 is greater than the particle size of the metal ore particles in the third grinding sub-chamber 253, so as to realize the segmented grinding of metal ore.

[0039] In one implementation, the height by which the first grinding strip 212 protrudes from the first grinding surface can be greater than the height by which the third grinding strip 221 protrudes from the third grinding surface. That is, when the third grinding strip 221 is within the groove structure formed between two adjacent first grinding strips 212, the top of the third grinding strip 221 does not contact the bottom of the first groove 224 structure, thus facilitating the transfer of hot air into the second grinding sub-chamber 252 and facilitating the transfer of the ground metal ore particles into the second grinding sub-chamber 252 by the hot air when the first grinding sub-chamber 251 grinds the metal ore.

[0040] In this implementation, the first grinding strip 212 and the second grinding strip 213 can be staggeredly arranged at the bottom of the upper grinding disc 21. Correspondingly, the third grinding strip 221 and the fourth grinding strip 222 can also be staggeredly arranged at the top of the lower grinding disc 22. That is, at least one end of at least part of the first grinding strip 212 away from the first feed port 211 corresponds to the second groove structure formed by two adjacent second grinding strips 213, and at least one end of at least part of the third grinding strip 221 away from the first feed port 211 corresponds to the fourth groove structure formed by two adjacent fourth grinding strips 222, thereby realizing non-simultaneous grinding of the metal particles in the first grinding sub-chamber 251 and the metal ore particles in the third grinding sub-chamber 253. Thus, when the metal ore particles in the first grinding sub-chamber 251 are being ground, the third grinding sub-chamber 253 is not grinding. At this time, the metal ore particles in the second grinding sub-chamber 252 can enter the third grinding sub-chamber 253 under the action of their own gravity and hot air, and the ground metal ore powder in the third grinding sub-chamber 253 can enter the discharge assembly 23 under the action of its own gravity and hot air. When the metal ore particles in the third grinding sub-chamber 253 are being ground, the first grinding sub-chamber 251 is not grinding. At this time, the metal ore particles in the first feed port 211 can enter the first grinding sub-chamber 251 under the action of their own gravity and hot air, and the ground metal ore particles in the first grinding sub-chamber 251 enter the second grinding sub-chamber 252. Through this setting, it is possible to effectively prevent an excessive amount of metal ore particles in the grinding chamber 25, which may cause a reduction in the grinding efficiency or grinding quality of the pretreatment device.

[0041] Please refer to Figures 1-3, 8 - 9, the grinding mechanism 2 further includes a first feed pipe 26, a second feed pipe 27, an air inlet pipe 28, and a first pipe joint 29; the first feed pipe 26 is connected to the first feed port 211; the inner diameter of the air inlet pipe 28 is less than or equal to the inner diameter of the first feed pipe 26 and greater than the outer diameter of the second feed pipe 27; the air inlet pipe 28 is sleeved on the second feed pipe 27, and one end of the air inlet pipe 28 is connected to the second feed pipe 27, and the other end is connected to the first feed pipe 26 through the first pipe joint 29; an air inlet 281 for connecting to the air outlet of the air supply mechanism 3 is further provided at the connection end of the air inlet pipe 28 and the second feed pipe 27. A connector may be provided at the connection end of the air inlet pipe 28 and the second feed pipe 27, and the inner diameter of the connector may be greater than or equal to the outer diameter of the second feed pipe 27 and less than the inner diameter of the air inlet pipe 28, so as to facilitate connecting the air inlet pipe 28 to the second feed pipe 27. It can be understood that the connection method between the second feed pipe 27 and the connector may be glue bonding or threaded connection, etc., and this embodiment does not limit this, as long as the air inlet pipe 28 can be fixed in the second feed pipe 27. An air inlet 281 for connecting to the air outlet of the air supply mechanism 3 is also provided on the side wall of the connection end of the air inlet pipe 28 and the second feed pipe 27, and the center line of the air inlet 281 is arranged offset from the center line of the air inlet pipe 28, that is, the center lines of the two do not intersect in space, so as to facilitate transferring the hot air in the air supply mechanism 3 into the first feed pipe 26. In one implementation, in order to ensure that the hot air of the air supply mechanism 3 is transferred into the first feed pipe 26, a spiral air guiding member 282 for guiding the flow of hot air may be provided on the inner side wall of the air inlet pipe 28. Specifically, the spiral air guiding member 282 is a spiral blade spirally arranged on the inner side wall of the air inlet pipe 28, and the height of the spiral blade protruding from the inner side wall of the air inlet pipe 28 may be equal to the difference between the radius of the inner diameter of the air inlet pipe 28 and the radius of the outer diameter of the second feed pipe 27. One end of the spiral blade away from the inner side wall of the air inlet pipe 28 abuts against the outer side wall of the second feed pipe 27, further guiding the hot air to flow in the direction of the first feed pipe 26.

[0042] Please refer to Figures 1-3 , the driving assembly 24 includes a driving motor 241, a first pulley 242, a second pulley 243, and a synchronous belt 244; the driving motor 241 is arranged on the base 1, the first pulley 242 is connected to the driving motor 241, the second pulley 243 is connected to the bottom of the lower grinding disc 22, and the synchronous belt 244 is sleeved on the first pulley 242 and the second pulley 243. That is, the rotation of the lower grinding disc 22 is driven by a belt drive mechanism.

[0043] A limit disk 223 may be provided at the bottom of the lower grinding disk 22. The center of the limit disk 223 is connected to the bottom of the lower grinding disk 22, and there is a certain gap at the bottom of the limit disk 223 away from the center. The grinding mechanism 2 further includes at least three rotating columns 30 and at least three limiting members 31. The rotating columns 30 and the limiting members 31 are arranged in one-to-one correspondence. At least three rotating columns 30 are arranged at intervals on the base 1, and the limiting members 31 are rotatably arranged on the rotating columns 30; a limiting groove 311 is provided on the limiting member 31, and the limit disk 223 is slidably limited in the limiting groove 311. After the limit disk 223 is arranged in the limiting groove 311, a part of the structure of the limiting member 31 is located at the gap between the limit disk 223 and the lower grinding disk 22. The rotating column 30 and the base 1 may be fixedly connected, and the limiting member 31 and the rotating column 30 may be connected through a bearing or the like, so as to reduce the sliding friction between the limiting member 31 and the limit disk 223. The limit disk 223 is slidably limited in the limiting groove 311, which can play a role in limiting the limit disk 223 in the up and down directions, front and back, left and right directions, etc., to ensure that the lower grinding disk 22 has only rotational freedom. The number of the rotating columns 30 and the limiting members 31 may also be four, five, etc. This embodiment does not limit this, as long as it can limit the lower grinding disk 22.

[0044] Please refer to Figures 1-3, 10, the discharging assembly 23 includes two material receiving members 231, two first discharging pipes 232, a second discharging pipe 233 and a receiving bag (not shown in the figure); the first discharging pipes 232 and the material receiving members 231 are arranged in one-to-one correspondence; the upper end of the material receiving member 231 is arc-shaped, and the lower end gradually converges. A material receiving cavity 2311 is arranged inside the material receiving member 231. The material receiving cavity 2311 has a material receiving port and a second discharging port. The material receiving port is connected to the first discharging port of the third grinding sub-cavity 253. The second discharging port is arranged at the converging end of the material receiving member 231 and is connected to the first discharging pipe 232. One end of the two first discharging pipes 232 away from the second discharging port is connected to the second discharging pipe 233. The receiving bag is connected to one end of the second discharging pipe 233 away from the first discharging pipe 232; the inner side wall 2312 of the material receiving member 231 is slidably connected to the lower grinding disc 22, and the outer side wall 2313 of the material receiving member 231 is fixedly connected to the upper grinding disc 21. The outer side wall 2313 of the material receiving member 231 can be connected to the upper grinding disc 21 by screws, and a sealing structure such as a sealing ring can be arranged at the connection to prevent the leakage of metal ore powder through the gap between the two. The upper ends of the two material receiving members 231 enclose a circular material receiving ring, which is arranged around the circumference of the lower grinding disc 22. Chamfers are respectively arranged at the connection of the material receiving cavities 2311 of the two material receiving members 231 so that the metal ore powder ground in the third grinding sub-cavity 253 can enter the material receiving cavity 2311. The lower ends of the two material receiving members 231 converge, and the smallest ends after convergence are respectively connected to one of the two first discharging pipes 232 to facilitate the transfer of the metal ore powder in the material receiving cavity 2311 into the first discharging pipe 232. The receiving bag can be a bag-like structure provided with a microporous membrane (such as PTFE or PE membrane), and the opening of the bag-like structure is connected to the second discharging pipe 233 for containing metal ore powder. The microporous membrane can allow the hot air generated by the air supply mechanism 3 to pass through, but the metal ore powder cannot pass through, thereby ensuring that the metal ore powder is stored in the receiving bag.

[0045] Please refer to Figure 6 , 10, a first groove 224 for accommodating the inner side wall 2312 of the material receiving member 231 may be provided on the outer side wall of the lower grinding disc 22. The opening direction of the first groove 224 faces the bottom of the lower grinding disc 22, and a second groove 2241 is provided on the inner side wall of the first groove. A first protrusion 23121 for being arranged in the second groove 2241 is provided on the inner side wall 2312 of the material receiving member 231. After the first protrusion 23121 is arranged in the second groove 2241, the side wall of the first protrusion 23121 abuts against the side wall of the second groove 2241. The first protrusion 23121 may be arranged on the side of the inner side wall 2312 facing the material receiving cavity 2311 to increase the contact area between the material receiving member 231 and the lower grinding disc 22 and ensure that the metal ore powder does not leak. In addition, a sealing structure such as a sealing ring may be provided between the inner side wall 2312 of the material receiving member 231 and the first groove 224 to further ensure that the metal ore powder does not leak.

[0046] Please refer to Figures 11-12 , on the other hand, the present invention further provides a metal ore pretreatment system, including the metal ore pretreatment device as described above, and further including a crushing mechanism 4, a screening mechanism 5 and a lifting mechanism 6; the crushing mechanism 4 includes a second feed port and two oppositely arranged crushing rollers, and the crushing mechanism 4 is used to crush the metal ore raw material into metal ore particles; the screening mechanism 5 is arranged below the crushing mechanism 4 and is used to screen the metal ore particles crushed by the crushing mechanism 4, transfer the metal ore particles with qualified particle size into the metal ore pretreatment device for pretreatment, and convey the metal ore particles with unqualified particle size into the lifting mechanism 6; the lifting mechanism 6 is used to convey the metal ore particles with unqualified particle size into the crushing mechanism 4 for secondary crushing. It can be understood that the metal ore with unqualified particle size may be large particles that are not convenient for the metal ore pretreatment device to grind, so it is necessary to use the lifting mechanism 6 to send them into the crushing mechanism 4 for secondary crushing.

[0047] The crushing mechanism 4 includes a crushing cavity formed by enclosing a plurality of side plates and a driving mechanism for driving the crushing rollers to rotate, and the crushing rollers are arranged in the crushing cavity. The driving mechanism can drive the crushing rollers to rotate through a belt transmission mechanism, so as to realize crushing the metal ore by using the crushing rollers.

[0048] The screening mechanism 5 may include a sieve plate rotatably arranged at the bottom of the crushing mechanism 4 and a receiving assembly arranged at the bottom of the sieve plate. The sieve plate is inclined relative to the horizontal plane. The higher end of the sieve plate is rotatably connected to the front side plate and the rear side plate of the crushing cavity through a rotating shaft. A third discharge port is arranged on the left side plate of the crushing cavity. The lifting mechanism 6 is correspondingly arranged with the third discharge port. So that after the sieve plate screens the metal ore particles, the metal ore particles with unqualified particle sizes are conveyed into the lifting mechanism 6. The lifting mechanism 6 conveys the metal ore particles with unqualified particle sizes into the crushing mechanism 4 for secondary crushing. The receiving assembly is composed of a plurality of flat plates inclined relative to the horizontal plane. The lower ends of the plurality of inclined flat plates converge together and are connected to the second feed pipe 27, so as to convey the metal ore particles with qualified particle sizes into the metal ore pretreatment device for grinding.

[0049] The lifting mechanism 6 may include a storage cavity and a lifting assembly for transporting the unqualified metal ore particles in the storage cavity into the crushing mechanism 4. The lifting assembly may include a conveyor belt and a belt drive structure. The belt drive structure is used to drive the conveyor belt to move, so as to transport the unqualified metal ore into the crushing mechanism 4.

[0050] In one embodiment, the screening mechanism 5 further includes a vibration assembly. The vibration assembly includes a cam rotatably arranged on the left side plate of the crushing cavity. The cam is connected to the belt drive structure for driving the conveyor belt to move. The cam is used to drive the sieve to rotate relative to the front side plate and the rear side plate of the crushing cavity to prevent the screening holes of the sieve plate from being blocked by metal ore particles.

[0051] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A metal ore pretreatment device, characterized in that: include: Base; A grinding mechanism, the grinding mechanism is arranged on the base, and the grinding mechanism is used to grind the metal ore; An air supply mechanism, the air supply mechanism is arranged on the base, the air outlet of the air supply mechanism is connected to the first feed port of the grinding mechanism, and the air supply mechanism is used to transport hot air into the grinding mechanism; In which, the grinding mechanism includes an upper grinding disc fixedly connected to the base and provided with a first feed port, a lower grinding disc rotatably connected to the base, a discharging assembly arranged on the base and ring-arranged on the outer side of the lower grinding disc, and a driving assembly arranged on the base for driving the lower grinding disc to rotate; a conical grinding chamber is formed between the upper grinding disc and the lower grinding disc, the small end of the grinding chamber is arranged toward the upper grinding disc, and the small end of the grinding chamber is connected to the first feed port; the grinding chamber includes a first grinding sub-chamber, a second grinding sub-chamber and a third grinding sub-chamber which are arranged in sequence from the small end of the grinding chamber to the large end of the grinding chamber; the maximum gap between the upper grinding disc and the lower grinding disc in the first grinding sub-chamber is greater than the maximum gap in the third grinding sub-chamber; the first grinding surface of the upper grinding disc located in the first grinding sub-chamber is parallel to the second grinding surface of the upper grinding disc located in the third grinding sub-chamber.

2. A metal ore pretreatment device according to claim 1, characterized in that: A plurality of first grinding strips are arranged at intervals on the first grinding surface of the upper grinding disc; a plurality of second grinding strips are arranged at intervals on the second grinding surface of the upper grinding disc; The third grinding surface of the lower grinding disc located in the first grinding sub-chamber is provided with a plurality of third grinding strips at intervals; the fourth grinding surface of the lower grinding disc located in the third grinding sub-chamber is provided with a plurality of fourth grinding strips; A plurality of the first grinding strips and a plurality of the third grinding strips are extended from the small end of the first grinding sub-chamber to the large end of the first grinding sub-chamber; The plurality of the second grinding strips and the plurality of the fourth grinding strips are extended from the small end of the third grinding sub-chamber to the large end of the third grinding sub-chamber.

3. A metal ore pretreatment device according to claim 2, characterized in that: A height of the first grinding strip protruding from the first grinding surface is greater than a height of the second grinding strip protruding from the second grinding surface.

4. A metal ore pretreatment device according to claim 3, characterized in that: The first grinding strip and the second grinding strip are staggeredly arranged at the bottom of the upper grinding disc; And / or, a height of the first grinding strip protruding from the first grinding surface is greater than a height of the third grinding strip protruding from the third grinding surface.

5. A metal ore pretreatment device according to claim 1, characterized in that: The grinding mechanism also includes a first feed pipe, a second feed pipe, an air inlet pipe and a first pipe joint; The first feed pipe is connected to the first feed port; the inner diameter of the air inlet pipe is less than or equal to the inner diameter of the first feed pipe, and is larger than the outer diameter of the second feed pipe; the air inlet pipe is sleeved on the second feed pipe, and one end of the air inlet pipe is connected to the second feed pipe, and the other end is connected to the first feed pipe through the first pipe joint; the connecting end of the air inlet pipe and the second feed pipe is also provided with an air inlet for connecting to the air outlet of the air supply mechanism.

6. A metal ore pretreatment device according to claim 5, characterized in that: A spiral air induction member for guiding hot air to flow toward the first feed pipe is arranged on the inner side wall of the air inlet pipe.

7. The metal ore pretreatment device according to claim 1, characterized in that: The driving assembly comprises a driving motor, a first pulley, a second pulley and a synchronous belt; the driving motor is arranged on the base, the first pulley is connected to the driving motor, the second pulley is connected to the bottom of the lower grinding disc, and the synchronous belt is sleeved on the first pulley and the second pulley; And / or, a limiting disk is provided at the bottom of the lower grinding disk; the grinding mechanism also includes at least three rotating columns and at least three limiting members, the rotating columns and the limiting members are arranged in a one-to-one correspondence, at least three rotating columns are arranged on the base at intervals, and the limiting members are rotatably arranged on the rotating columns; a limiting groove is provided on the limiting member, and the limiting disk is slidably limited in the limiting groove.

8. The metal ore pretreatment device according to claim 1, characterized in that: The material discharging assembly comprises two material receiving parts, two first material discharging pipes, a second material discharging pipe and a material receiving bag; the first material discharging pipes and the material receiving parts are arranged in a one-to-one correspondence; The upper end of the material receiving piece is arc-shaped, and the lower end gradually converges. A material receiving cavity is arranged in the material receiving piece, and the material receiving cavity has a material receiving port and a second material discharging port. The material receiving port is connected to the first material discharging port of the third grinding sub-chamber, and the second material discharging port is connected to the first material discharging pipe. One end of the two first material discharging pipes away from the second material discharging port is connected to the second material discharging pipe, and the material receiving bag is connected to one end of the second material discharging pipe away from the first material discharging pipe. The inner side wall of the material receiving piece is slidably connected to the lower grinding disc, and the outer side wall of the material receiving piece is fixedly connected to the upper grinding disc.

9. A metal ore pretreatment device according to claim 8, characterized in that: A first groove for accommodating the inner wall of the material receiving piece is provided on the outer wall of the lower grinding disc, the opening direction of the first groove is toward the bottom of the lower grinding disc, and a second groove is provided on the inner wall of the first groove; a first protrusion for accommodating the second groove is provided on the inner wall of the material receiving piece.

10. A metal ore pretreatment system, characterized in that: A metal ore pretreatment device comprising any one of claims 1 to 8, further comprising a crushing mechanism, a screening mechanism and a lifting mechanism; The crushing mechanism comprises a second feed port and two crushing rollers arranged opposite to each other, and the crushing mechanism is used to crush the metal ore raw material into metal ore particles; The screening mechanism is arranged below the crushing mechanism, and is used to screen the metal ore particles crushed by the crushing mechanism, and transfer the metal ore particles with qualified particle size to the metal ore pretreatment device for pretreatment, and transport the metal ore particles with unqualified particle size to the lifting mechanism; The lifting mechanism is used to transport the metal ore particles with unqualified particle sizes to the crushing mechanism for secondary crushing.

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