Cyclone for ore grinding

Abstract

The utility model provides a cyclone for ore grinding, which belongs to the technical field of ore processing equipment and comprises a cyclone chamber, the upper portion of the outer wall of the cyclone chamber is connected with a feeding pipe, the bottom of the cyclone chamber is communicated with a conical barrel, and the bottom of the conical barrel is communicated with a sand setting pipe. An overflow pipe is communicated with the central position of the rotational flow chamber in a penetrating manner; the feeding pipe comprises a straight pipe section and a volute pipe section, the volute pipe section spirally surrounds the outer wall of the rotational flow chamber by a circle, one end of the volute pipe section is communicated with the straight pipe section, the other end of the volute pipe section is communicated with the rotational flow chamber through a feeding port formed in the side wall of the rotational flow chamber, and the volute pipe section is tangent and communicated with the outer wall of the rotational flow chamber; a plurality of spiral spoilers are arranged on the surface of the inner side of the overflow pipe, are uniformly distributed in the circumferential direction of the overflow pipe and are arranged in an array manner in the axis direction of the overflow pipe. When the cyclone is used, the cyclone is not easily interfered by feeding changes, the stability of the internal flowing state can be guaranteed, the phenomena of fine grain loss and overflow and coarse grain leakage are avoided, and the material separation precision and separation efficiency of the cyclone in ore grinding classification can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ore processing equipment, in particular to a cyclone used for grinding ore. Background Art

[0002] my country has very rich mineral resources. As a common grading equipment for separating heterogeneous phase mixtures, cyclones are used to achieve particle size separation and grading during the grinding process. Cyclones usually include main components such as a cyclone chamber, an overflow pipe, a grit pipe, a feed pipe, and a conical cylinder. They have the advantages of easy maintenance, high separation efficiency, small footprint, and low investment. However, during use, existing cyclones are affected by changes in feed volume or feed composition, which can interfere with the operational stability of the cyclone and easily lead to problems such as internal flow disorder, low grading efficiency, severe loss of fine particles, and overflow and coarse particles. These problems reduce the separation accuracy and efficiency of the materials, affect the production efficiency of the cyclone, and thus affect the efficiency of the entire grinding process and product quality. Utility Model Content

[0003] The utility model provides a cyclone for grinding, which is used to solve the problem that the existing cyclone is easily disturbed by the change of feed, resulting in a disordered internal flow state, low classification efficiency, serious loss of fine particles, overflow and coarse particles, etc., thereby reducing the material separation accuracy and separation efficiency.

[0004] The utility model provides a cyclone for grinding, comprising: a cylindrical cyclone chamber, the upper part of the outer wall of the cyclone chamber is connected to a feed pipe, the bottom of the cyclone chamber is connected to a conical cylinder, and the bottom of the conical cylinder is connected to a sand settling pipe; the center position of the cyclone chamber is also penetrated by an overflow pipe, the upper part of the overflow pipe extends to the outside of the cyclone chamber, and the lower part of the overflow pipe does not exceed the height of the cyclone chamber.

[0005] Furthermore, the feed pipe includes a straight pipe section and a volute pipe section. The volute pipe section spirally surrounds the outer wall of the cyclone chamber. One end of the volute pipe section is connected to the straight pipe section in a tangential feeding manner. The other end of the volute pipe section is connected to the cyclone chamber through a feed port opened on the side wall of the cyclone chamber, and the volute pipe section is tangentially connected to the outer wall of the cyclone chamber; the inner diameters of the straight pipe section and the volute pipe section are the same.

[0006] Furthermore, a plurality of spiral spoilers are provided on the inner surface of the overflow pipe. The spiral spoilers are evenly distributed along the circumferential direction of the overflow pipe and arranged in an array along the axial direction of the overflow pipe.

[0007] Furthermore, the cross section of the feeding tube is rectangular, square, circular or elliptical.

[0008] Furthermore, the overflow pipe is an inverted truncated cone structure with a gradually changing diameter, and the diameter of the pipe at one end located inside the cyclone chamber is smaller than the diameter of the pipe at one end located outside the cyclone chamber.

[0009] Furthermore, the spiral direction of each spiral spoiler is clockwise or counterclockwise from bottom to top along the overflow pipe, and is consistent with the spiral direction of the internal vortex in the vortex chamber.

[0010] Furthermore, the end surface area of ​​the overflow pipe in the cyclone chamber is larger than the area of ​​the feed port, and the end surface area of ​​the discharge port at one end of the sand settling pipe away from the cyclone chamber is larger than the end surface area of ​​the overflow pipe in the cyclone chamber.

[0011] Furthermore, a flushing pipeline is connected to the connection between the conical cylinder and the sand settling pipe, and a flushing valve is provided on the flushing pipeline.

[0012] Furthermore, the flushing pressure of the flushing line is lower than the pressure inside the conical cylinder.

[0013] Furthermore, the inner walls of the feed pipe, the cyclone chamber, the conical cylinder and the sand settling pipe, as well as the inner and outer walls of the overflow pipe are all provided with a wear-resistant layer.

[0014] The cyclone for ore grinding provided by this utility model stabilizes the feed flow field by leveraging pre-sedimentation within the volute section of the feed pipe. This improves feed stability, enhances separation efficiency, and reduces the loss of fine particles and the chance of overflow and coarse particles during material fluctuations. This cyclone is suitable not only for ore grinding and classification but also for various other applications such as solid-liquid separation. It boasts high classification efficiency and separation precision, and prevents grit tube clogging.

[0015] The cyclone uses the spiral spoiler in the overflow pipe to disturb the ore flow, which can reduce the coarseness of the cyclone overflow and improve the particle size composition of the cyclone overflow. It also uses the flushing pipeline to improve the fluidity of the ore in the sand settling pipe, which helps the ore discharge, reduces the risk of clogging of the cyclone discharge, and facilitates the improvement of production and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a cyclone for grinding provided in one embodiment of the present utility model;

[0018] Figure 2 A schematic diagram of the connection between the feed pipe and the cyclone chamber provided in one embodiment of the present invention;

[0019] Figure 3A schematic diagram of the connection between an existing feed pipe and a cyclone chamber provided in one embodiment of the present invention;

[0020] Figure 4 This is a schematic structural diagram of an overflow pipe provided in one embodiment of the present utility model.

[0021] Description of reference numerals:

[0022] 11-cyclone chamber, 12-feed pipe, 13-conical cylinder, 14-sand settling pipe, 15-overflow pipe, 16-flushing pipeline, 111-feed port, 121-straight pipe section, 122-volute pipe section, 151-spiral spoiler, 161-flushing valve. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of the present invention.

[0024] like Figure 1 The utility model provides a cyclone for grinding, comprising: a cylindrical cyclone chamber 11, the upper part of the outer wall of the cyclone chamber 11 is connected to a feed pipe 12, the bottom of the cyclone chamber 11 is connected to a conical cylinder 13, and the bottom of the conical cylinder 13 is connected to a sand settling pipe 14; the center position of the cyclone chamber 11 is also penetrated by an overflow pipe 15, the upper part of the overflow pipe 15 extends to the outside of the cyclone chamber 11, and the lower part of the overflow pipe 15 does not exceed the height of the cyclone chamber 11.

[0025] When the cyclone starts grinding and classifying, the ore enters the cyclone chamber 11 through the feed pipe 12 and the feed port 111, and spirally flows along the inner wall of the cyclone chamber 11 and the conical cylinder 13 to form an external vortex. In this process, the ore generates a huge centrifugal force. Affected by the weight difference between ores of different particle sizes, the ore is classified under the action of centrifugal force and gravity. The coarse particles sink to the sand settling pipe 14 and are discharged, while the fine particles form an internal vortex and rise, and are finally discharged through the overflow pipe 15, completing the grinding and classification.

[0026] like Figure 1 and Figure 2Preferably, the feed pipe 12 includes a straight pipe section 121 and a volute pipe section 122. The volute pipe section 122 spirally surrounds the outer wall of the cyclone chamber 11. One end of the volute pipe section 122 is connected to the straight pipe section 121 in a tangential feeding manner, and the other end of the volute pipe section 122 is connected to the cyclone chamber 11 through a feed port 111 opened on the side wall of the cyclone chamber 11, and the volute pipe section 122 is tangentially connected to the outer wall of the cyclone chamber 11; the inner diameters of the straight pipe section 121 and the volute pipe section 122 are the same.

[0027] Compared with the existing simple tangential feeding method (such as Figure 3 The straight pipe section 121 is equivalent to the feed pipe 12. The feed pipe 12 is formed by connecting the straight pipe section 121 and the volute section 122. The volute section 122 provides a certain centrifugal force to the ore material, causing the solid particles to undergo centrifugal pre-sedimentation due to particle size differences in the volute section 122. This allows the ore particles to undergo a new particle size ranking along the rotation direction of the volute section 122, which is beneficial for accelerating subsequent cyclone classification. The longer length of the combined feed pipe 12 stabilizes the feed flow field, improves the stability of the ore feed, reduces the loss of fine particles and the probability of overflow and coarse particles when the incoming material fluctuates, and is more conducive to the classification of the ore in the cyclone, improving classification efficiency and separation accuracy.

[0028] like Figure 4 Preferably, the inner surface of the overflow pipe 15 is provided with a plurality of spiral spoilers 151. The spiral spoilers 151 are evenly distributed along the circumference of the overflow pipe 15 and arranged in an array along the axis of the overflow pipe 15. The spiral spoilers 151 can disturb the flow of the ore in the overflow pipe 15, disrupting the coarse particles entrained therein and causing them to return to the cyclone chamber 11 under the action of gravity. This can reduce the coarseness of the cyclone overflow, improve the particle size composition of the cyclone overflow, enhance separation accuracy, and ensure the classification effect of the cyclone.

[0029] Preferably, the cross section of the feeding tube 12 is rectangular, square, circular or elliptical.

[0030] In order to prevent the operating conditions and pressure changes from disturbing the internal vortex, thereby causing overflow and coarseness problems, it is preferred that Figure 4 The overflow pipe 15 has a gradually changing inverted truncated cone shape, with the diameter of the end inside the cyclone chamber 11 being smaller than the diameter of the end outside. The inverted truncated cone shape of the overflow pipe 15 gradually reduces the axial and tangential velocities of the material as it moves through the overflow pipe 15. This allows any coarse particles carried within the overflow pipe to settle back into the cyclone chamber 11 due to their slow velocity, thus preventing overflow and coarse particles from flowing out.

[0031] The rotation direction of the mineral vortex in the cyclone is related to the feed direction. In order to avoid the internal vortex in the overflow pipe 15 being destroyed due to different rotation directions and affecting the overflow of fine particles, preferably, the spiral direction of each spiral spoiler 151 is clockwise or counterclockwise from bottom to top along the overflow pipe 15, and is consistent with the rotation direction of the internal vortex in the cyclone chamber 11.

[0032] The spiral spoiler 151 can interfere with and enrich the coarse particles mixed in the fine particles in the inner vortex, causing them to sink, while the fine particles continue to overflow along the spiral spoiler 151 under the action of the inner vortex. The spiral spoiler 151 washes the particles in the inner vortex, thereby improving the separation accuracy and sorting effect.

[0033] In order to improve the classification effect of the cyclone, the end face dimensions of each structure are optimized. Preferably, the end face area of ​​the overflow pipe 15 located in the cyclone chamber 11 is larger than the area of ​​the feed port 111, and the end face area of ​​the discharge port at the end of the sand settling tube 14 away from the cyclone chamber 11 is larger than the end face area of ​​the overflow pipe 15 located in the cyclone chamber 11.

[0034] The large grit tube 14 accelerates the discharge of coarse particles, preventing them from being carried into the internal vortex, thereby improving classification efficiency. The large overflow tube 15 increases the overflow velocity of the internal vortex. These structures combine to improve the flow field within the cyclone, adapting to different ore properties and classification requirements, and enhancing its ability to classify minerals of varying particle sizes.

[0035] In order to prevent the discharge of the sand settling tube 14 from being blocked, preferably, Figure 1 A flushing line 16 is also connected to the connection between the conical cylinder 13 and the grit tube 14, and a flushing valve 161 is provided on the flushing line 16. The flushing line 16 can use gas or water as a flushing medium to improve the fluidity of the ore in the grit tube 14, facilitate the discharge of the ore, reduce the risk of clogging of the cyclone discharge, and facilitate the improvement of production and processing efficiency.

[0036] To avoid affecting the flow field inside the cyclone during flushing, the flushing pressure of the flushing line 16 is preferably lower than the pressure inside the conical barrel 13. This not only facilitates pressure relief during material discharge, but also prevents the flushing process from adversely affecting the separation process of the cyclone, thereby ensuring the operational stability of the cyclone.

[0037] Mineral materials can cause wear on the equipment. Therefore, preferably, a wear-resistant layer is applied to the inner walls of the feed pipe 12, cyclone chamber 11, conical cylinder 13, and grit tube 14, as well as the inner and outer walls of the overflow pipe 15. This layer reduces wear, facilitating smoother material flow and extending the life of the cyclone.

[0038] In a cyclone used for grinding, when the ore first enters the straight section 121 of the feed pipe 12, then tangentially enters the volute section 122. Under the centrifugal action of the volute section 122, the ore undergoes centrifugal pre-sedimentation due to particle size differences, which helps to accelerate subsequent cyclone classification. The ore then enters the cyclone chamber 11 through the feed port 111 and spirals along the inner walls of the cyclone chamber 11 and the conical cylinder 13, forming an external cyclone. During this process, the ore generates a huge centrifugal force. Affected by the weight difference between ore particles of different particle sizes, the ore is classified under the action of centrifugal force and gravity. Coarse particles sink to the grit chamber 14 and are discharged, while fine particles form an internal cyclone and rise, ultimately being discharged through the overflow pipe 15, completing the ore classification process.

[0039] The overflow pipe 15 is an inverted truncated cone structure with a gradually changing diameter. The inner vortex formed by the fine particles is disturbed by the spiral spoiler 151 during its upward process, so that the coarse particles entrained in the inner vortex are disturbed and then return to the cyclone chamber 11 under the action of gravity, which can reduce the degree of coarseness of the overflow of the cyclone.

[0040] A flushing line 16 is connected to the junction of the conical drum 13 and the grit tube 14. This flushing line 16 is equipped with a flushing valve 161. The flushing pressure of this flushing line 16 is lower than the pressure inside the conical drum 13. This flushing line 16 can use gas or water as a flushing medium, improving the fluidity of the material in the grit tube 14, facilitating material discharge and reducing the risk of clogging at the cyclone discharge. Furthermore, flushing does not affect the flow field inside the cyclone, thereby improving production and processing efficiency.

[0041] It should be noted that the detailed structure of some devices is not described in detail in this utility model, but belongs to the prior art known to those skilled in the art, so it will not be repeated here. In addition, the parts not described in this device are the same as the prior art or can be implemented by using the prior art.

[0042] It should be noted that the conveying pipelines inside the system are provided between different units or devices and equipment. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the above embodiments, or to replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A cyclone for grinding, characterized in that: include: A cylindrical cyclone chamber, wherein the upper portion of the outer wall of the cyclone chamber is connected to a feed pipe, the bottom of the cyclone chamber is connected to a conical cylinder, and the bottom of the conical cylinder is connected to a sand settling pipe; an overflow pipe is also passed through the center of the cyclone chamber, the upper portion of the overflow pipe extends to the outside of the cyclone chamber, and the lower portion of the overflow pipe does not exceed the height of the cyclone chamber; The feed pipe includes a straight pipe section and a volute pipe section, the volute pipe section spirally surrounds the outer wall of the cyclone chamber, one end of the volute pipe section is connected to the straight pipe section in a tangential feeding manner, and the other end of the volute pipe section is connected to the cyclone chamber through a feed port provided on the side wall of the cyclone chamber, and the volute pipe section is tangentially connected to the outer wall of the cyclone chamber; the straight pipe section and the volute pipe section have the same inner diameter; The inner surface of the overflow pipe is provided with a plurality of spiral spoilers, which are evenly distributed along the circumferential direction of the overflow pipe and arranged in an array along the axial direction of the overflow pipe.

2. The cyclone for grinding according to claim 1, characterized in that: The cross section of the feeding pipe is rectangular, square, circular or elliptical.

3. The cyclone for grinding according to claim 1, characterized in that: The overflow pipe is an inverted truncated cone structure with a gradually changing diameter, and the diameter of the pipe at one end located inside the cyclone chamber is smaller than the diameter of the pipe at one end located outside the cyclone chamber.

4. The cyclone for grinding according to claim 1, characterized in that: The spiral direction of each spiral spoiler is clockwise or counterclockwise from bottom to top along the overflow pipe, and is consistent with the rotation direction of the internal vortex in the vortex chamber.

5. The cyclone for grinding according to claim 1, characterized in that: The end surface area of ​​the overflow pipe in the cyclone chamber is larger than the area of ​​the feed port, and the end surface area of ​​the discharge port of the sand settling pipe at one end away from the cyclone chamber is larger than the end surface area of ​​the overflow pipe in the cyclone chamber.

6. The cyclone for grinding according to any one of claims 1 to 5, characterized in that: The connection between the conical cylinder and the sand settling pipe is also connected to a flushing pipeline, and a flushing valve is provided on the flushing pipeline.

7. The cyclone for grinding according to claim 6, characterized in that: The flushing pressure of the flushing line is lower than the pressure inside the conical cylinder.

8. The cyclone for grinding according to claim 7, characterized in that: The inner walls of the feed pipe, the cyclone chamber, the conical cylinder and the sand settling pipe, as well as the inner wall and outer wall of the overflow pipe are all provided with a wear-resistant layer.

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