Stirring device and flotation machine

Abstract

The utility model provides a stirring device and a flotation machine so as to improve the working efficiency of the flotation machine. The stirring device is applied to the flotation machine and comprises a center cylinder, the center cylinder comprises a lower cylinder body with openings in the upper portion and the lower portion, an upper cylinder body with an opening in the lower end and a partition plate used for connecting the lower cylinder body and the upper cylinder body, and an air inlet is formed in the outer wall of the lower cylinder body; the air inlet pipe is communicated with the air inlet; one end of the main shaft extends out of the upper barrel body, the other end of the main shaft sequentially penetrates through the upper barrel body, the partition plate and the lower barrel body and then extends out of the lower barrel body, and an impeller is arranged at the end, close to the lower barrel body, of the main shaft; and the output end of the driving structure is connected with the end, close to the upper barrel body, of the main shaft, so that the driving structure is used for driving the main shaft to rotate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flotation machines, in particular to a stirring device and a flotation machine. BACKGROUND

[0002] The flotation method has now become one of the most important methods for selecting mineral raw materials in the world. It is not only used for separating metal and non-metal minerals, but also widely used in many raw materials, products or waste recycling, separation, purification, etc. in the industries of metallurgy, papermaking, agriculture, food, medicine, microorganism, environmental protection, etc.

[0003] Mechanical stirring air flotation machine is the most widely used physical means to realize material separation, which is mainly applied in mining, coal, water treatment, non-ferrous metal, papermaking and other industries. During flotation, the slurry is mixed with flotation reagents and then sent into the flotation machine. The slurry is stirred by the mechanical driven impeller, and the entering air is dispersed into small bubbles. The target material such as carbon powder is attached to the bubbles and floats to the surface of the slurry to form a foam layer. The foam is scraped out by the scraper or discharged by the self-overflowing method, and the foam product is obtained, while the non-foam product is discharged with the slurry.

[0004] However, in the related art, when the flotation machine is working, the external gas cannot be fully mixed with the slurry to form bubbles, resulting in low working efficiency of the flotation machine and poor separation effect of the target material. Practical new type content

[0005] The present application provides a stirring device and a flotation machine to improve the working efficiency of the flotation machine.

[0006] The specific technical solutions are as follows:

[0007] A stirring device applied to a flotation machine, comprising: a center cylinder, the center cylinder comprising a lower cylinder body having openings at the upper and lower ends, an upper cylinder body having an opening at the lower end, and a partition plate for connecting the lower cylinder body and the upper cylinder body, an outer wall of the lower cylinder body being provided with an air inlet; an air inlet pipe in communication with the air inlet; a main shaft, one end of the main shaft extending out of the upper cylinder body, the other end of the main shaft extending out of the lower cylinder body in sequence through the upper cylinder body, the partition plate and the lower cylinder body, an end of the main shaft close to the lower cylinder body being provided with an impeller; and a driving structure, an output end of the driving structure being connected with one end of the main shaft close to the upper cylinder body for driving the main shaft to rotate.

[0008] In the present application, the central cylinder of the stirring device comprises a lower cylinder body, an upper cylinder body and a partition plate therebetween. That is, the inner chamber of the central cylinder is divided into two parts by the partition plate, and the gas inlet is located on the outer wall of the lower cylinder body. During the flotation process, after the gas enters the lower cylinder body through the gas inlet pipe, due to the blocking effect of the partition plate, most of the gas is more likely to diffuse towards the position of the impeller through the lower part of the lower cylinder body, and only a small amount of gas or even no gas diffuses into the inner chamber of the upper cylinder body. In this way, the space for actual gas circulation in the central cylinder is reduced, and the gas is more easily sucked into the position of the impeller by negative pressure, thereby facilitating the improvement of the gas suction efficiency and effect, enabling the pulp to be fully mixed with the gas, and further facilitating the improvement of the working efficiency of the flotation machine and the effect of material separation.

[0009] In some embodiments, a first mounting hole is arranged at the middle part of the partition plate; and the stirring device further comprises a first bearing mounted in the first mounting hole and sleeved on the outer wall of the main shaft.

[0010] In some embodiments, a second mounting hole is arranged at the top of the upper cylinder body; and the stirring device further comprises a second bearing mounted in the second mounting hole and sleeved on the outer wall of the main shaft.

[0011] In some embodiments, the partition plate is a flange blind plate.

[0012] In some embodiments, the thickness of the partition plate is greater than or equal to 10 mm and less than or equal to 100 mm.

[0013] In some embodiments, the stirring device further comprises a stator structure comprising a connecting plate and a plurality of guide vanes arranged at the edge of the lower surface of the connecting plate, the upper surface of the connecting plate being connected with the lower cylinder body, and the guide vanes being located on the outer side of the impeller.

[0014] In some embodiments, the stirring device further comprises a shaft coupling and / or a speed reducer for connecting the driving structure and the main shaft.

[0015] In the second aspect, the embodiments of the present application provide a flotation machine comprising a tank body and the stirring device of the first aspect, the tank body having a pulp inlet and a pulp outlet, and the inside of the tank body having a receiving cavity for accommodating the stirring device.

[0016] In some embodiments, a foam outlet is arranged at the top of the tank body, the flotation machine further comprises a scraper structure arranged at the top of the tank body, the stirring device is configured to form a foam layer of a predetermined thickness from the pulp, and the scraper structure is configured to scrape the foam layer out of the tank body through the foam outlet. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic diagram of a stirring device according to an embodiment of the present application;

[0018] Figure 2 Fig. 2 is a structural schematic diagram of a flotation machine according to an embodiment of the present application.

[0019] Legend of reference signs:

[0020] 10 - flotation machine;

[0021] 100 - stirring device; 110 - central cylinder; 111 - lower cylinder body; 112 - upper cylinder body; 113 - partition plate; 1111 - air inlet; 120 - air inlet pipe; 130 - main shaft; 131 - impeller; 1131 - first mounting hole; 150 - first bearing; 1121 - second mounting hole; 160 - second bearing; 170 - stator structure; 171 - connecting plate; 172 - guide vane; 180 - coupling;

[0022] 200 - tank body; 210 - pulp inlet; 220 - pulp outlet; 230 - foam outlet; 300 - scraper structure; 400 - foam layer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0024] In the description of the present application, it should be understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the position relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0026] In the description of the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connection", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a mediating element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a mediating element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0028] In a first aspect, the embodiments of the present application propose a stirring device 100 applied to a flotation machine 10. As shown in Figure 1 As shown in the figure, the stirring device 100 includes a central cylinder 110, an air inlet pipe 120, a main shaft 130 and a driving structure 140. The central cylinder 110 includes a lower cylinder body 111 having openings at the upper and lower ends, an upper cylinder body 112 having an opening at the lower end, and a partition plate 113 for connecting the lower cylinder body 111 and the upper cylinder body 112. The outer wall of the lower cylinder body 111 is provided with an air inlet 1111, and the air inlet pipe 120 communicates with the air inlet 1111. One end of the main shaft 130 protrudes out of the upper cylinder body 112, and the other end protrudes out of the lower cylinder body 111 in sequence through the upper cylinder body 112, the partition plate 113 and the lower cylinder body 111. The end of the main shaft 130 close to the lower cylinder body 111 is provided with an impeller 131. The output end of the driving structure 140 is connected to the end of the main shaft 130 close to the upper cylinder body 112, for driving the main shaft 130 to rotate.

[0029] In the present application, the stirring device 100 is applied to the flotation machine 10. Specifically, the stirring device 100 includes a central cylinder 110, an air inlet pipe 120, a main shaft 130 and a driving structure 140. The central cylinder 110 is used to provide a part of the air inlet channel, and at the same time can form a protection for the main shaft 130 to avoid the main shaft 130 being exposed. Further, the central cylinder 110 is a multi-section structure, which specifically includes an upper cylinder body 112, a partition plate 113 and a lower cylinder body 111. The air inlet pipe 120 can provide gas during flotation. The gas enters the central cylinder 110 through the air inlet pipe 120, and then enters the position where the impeller 131 is located through the central cylinder 110, so that the gas can be fully mixed with the slurry, thereby forming a foam with the required separated substances.

[0030] One end of the main shaft 130 is provided with the impeller 131, and the other end is connected with the output end of the driving structure 140. In this way, under the driving of the driving structure 140, the main shaft 130 can drive the impeller 131 to rotate, so that the impeller 131 can stir the slurry. The impeller 131 usually has a plurality of blades for stirring. Alternatively, the impeller 131 can be connected with the main shaft 130 by welding, connecting member, etc.

[0031] The following specifically describes the flotation process of the flotation machine 10 of the stirring device 100 according to the embodiments of the present application. First, the slurry is injected into the tank body 200 of the flotation machine 10. The slurry refers to a mixture of the required substances and the liquid. For example, when carbon residue flotation is performed, the slurry can be a mixture of carbon powder, electrolyte and reagent. Then, the driving structure 140 drives the main shaft 130 to rotate, and in turn drives the impeller 131 to rotate. Under the rotation of the impeller 131, the slurry is stirred. At the same time, due to the action of centrifugal force, a negative pressure is formed at the stirring position. At this time, the external gas has high pressure, and the external gas enters the central cylinder 110 through the air inlet pipe 120, and then enters the position where the impeller 131 is located, and is mixed and stirred with the slurry. In this way, with continuous stirring, the target substances such as carbon powder in the slurry will mix with the gas to form foam, and will gather into a foam layer 400 floating on the surface of the slurry in the tank body 200. Finally, the foam layer is collected by the overflow of the slurry itself, or the scraper structure 300 provided at the top of the tank body 200 scrapes the foam. In this way, the entire flotation process is completed.

[0032] In the present application, the central cylinder 110 of the stirring device 100 includes a lower cylinder body 111, an upper cylinder body 112 and a partition plate 113 therebetween. That is, the inner chamber of the central cylinder 110 is divided into two parts isolated from each other by the partition plate 113, and the air inlet 1111 is located on the outer wall of the lower cylinder body 111. During the flotation process, the gas enters the lower cylinder body 111 through the air inlet pipe 120, and due to the blocking action of the partition plate 113, most of the gas is more easily diffused through the lower part of the lower cylinder body 111 towards the position where the impeller 131 is located, and only a small amount of gas or even no gas diffuses into the inner chamber of the upper cylinder body 112. In this way, the space actually used for gas circulation in the central cylinder 110 is reduced, and the gas is more easily sucked into the position where the impeller 131 is located by the negative pressure, thereby facilitating to improve the gas suction efficiency and suction effect, so that the slurry can be fully mixed with the gas, and in turn facilitating to improve the working efficiency of the flotation machine 10 and the effect of substance separation. In addition, the central cylinder 110 is divided into multiple sections by the partition plate 113, thereby also facilitating to reduce the manufacturing difficulty of the central cylinder 110 and the assembly difficulty of the stirring device 100.

[0033] In some embodiments, as Figure 1As shown, a first mounting hole 1131 is provided in the middle of the partition 113, and the stirring device 100 also includes a first bearing 150, which is installed in the first mounting hole 1131 and sleeved on the outer wall of the main shaft 130.

[0034] In this embodiment, the partition 113 and the first bearing 150 also serve to fix the spindle 130. By providing the first mounting hole 1131 and the first bearing 150, the smoothness and reliability of the spindle 130's operation are improved. Optionally, to improve the sealing performance between the spindle 130 and the first bearing 150, a shaft seal (not shown) is also provided inside the first bearing 150. The spindle 130 forms a dynamic seal through the shaft seal, which improves the sealing performance of the partition 113 and enhances the gas intake effect.

[0035] In some embodiments, such as Figure 1 As shown, the top of the upper cylinder 112 is provided with a second mounting hole 1121. The stirring device 100 also includes a second bearing 160, which is installed in the second mounting hole 1121 and sleeved on the outer wall of the main shaft 130. This arrangement allows the upper cylinder 112 and the second bearing 160 to also serve to fix the main shaft 130, thereby further improving the smoothness and reliability of the main shaft 130's operation. Furthermore, the combined use of the first bearing 150 and the second bearing 160 helps reduce the probability of axial movement of the main shaft 130 and improves the rotational reliability of the main shaft 130.

[0036] It should be noted that, in order to demonstrate the mounting structure of the first bearing 150 and the second bearing 160, in Figure 1 The example shows a cross-section of the central cylinder 110, but this is not intended to limit the specific structural dimensions of the central cylinder 110.

[0037] In some embodiments, the partition 113 is a flange blind plate. Flange blind plates are generally made of materials such as carbon steel, stainless steel, and alloy steel, which have high strength and are not easily worn, thereby improving the strength and reliability of the central cylinder 110.

[0038] In some embodiments, the thickness of the partition 113 is greater than or equal to 10 mm and less than or equal to 100 mm. This configuration can, on the one hand, improve the strength of the partition 113 to meet the overall strength requirements of the central cylinder 110. On the other hand, it avoids the partition 113 being too thick, thereby improving the ease of connection between the upper cylinder 112 and the lower cylinder 111.

[0039] In some embodiments, such as Figure 1As shown, the stirring device 100 further comprises a stator structure 170, which comprises a connecting plate 171 and a plurality of guide vanes 172 arranged at the edge of the lower surface of the connecting plate 171. The upper surface of the connecting plate 171 is connected with the lower cylinder 111, and the guide vanes 172 are located outside the impeller 131.

[0040] In this embodiment, the stirring device 100 further comprises a stator structure 170 for cooperating with the impeller 131. The stator structure 170 comprises a connecting plate 171 and a plurality of guide vanes 172. The connecting plate 171 is used to connect the guide vanes 172 and the lower cylinder 111, and the guide vanes 172 are located outside the impeller 131. In this way, after the pulp and air are fully mixed at the blades of the impeller 131, they can be dispersed into the entire tank body 200 of the flotation machine 10 through the guidance and orientation of the guide vanes 172. At this time, the bubbles formed float on the upper surface of the tank body 200 to form a froth layer 400. In this embodiment, the stator structure 170 is directly connected with the lower cylinder 111 as a whole, rather than being fixed to the bottom of the tank body 200, thereby facilitating the improvement of the coaxiality between the stator structure 170 and the impeller 131, so that the pulp can be fully guided and oriented by the stator structure 170, thereby facilitating the improvement of the flotation capacity of the flotation machine 10.

[0041] In some embodiments, as Figure 1 As shown, the stirring device 100 further comprises a shaft coupling 180 for connecting the driving structure 140 and the main shaft 130. In this way, the reliability and stability of the connection between the driving structure 140 and the main shaft 130 are improved.

[0042] In some embodiments, the stirring device 100 further comprises a speed reducer (not shown in the figure) for connecting the driving structure 140 and the main shaft 130. In this way, the rotational speed and torque of the impeller 131 can be reasonably selected, thereby facilitating the improvement of the flotation capacity of the flotation machine 10.

[0043] In some embodiments, the stirring device 100 further comprises a transmission steering device (not shown in the figure) for connecting the driving structure 140 and the main shaft 130. By providing the transmission steering device, the transmission direction of the driving structure 140 can be changed, thereby facilitating the convenience of arranging the driving structure 140 and improving the convenience of connecting the main shaft 130 and the driving structure 140.

[0044] In some embodiments, the driving structure 140 can be one of a gear driving structure, a synchronous belt driving structure, and a chain driving structure, and the present application does not limit this.

[0045] In a second aspect, the present application provides a flotation machine 10. As Figure 2As shown, the flotation machine 10 comprises a tank body 200 and the stirring device 100 of the first aspect, the tank body 200 has a pulp inlet 210 and a pulp outlet 220, and the inside of the tank body 200 has a receiving cavity S1 for accommodating the stirring device 100.

[0046] The flotation machine 10 of the embodiments of the present application uses the stirring device 100 of the first aspect, thereby facilitating to improve the gas suction efficiency and suction effect, so that the pulp can be fully mixed with the gas, thereby facilitating to improve the working efficiency of the flotation machine 10 and the effect of material separation. In addition, the central cylinder 110 is divided into multiple sections by the partition plate 113, thereby also facilitating to reduce the manufacturing difficulty of the central cylinder 110 and the assembly difficulty of the stirring device 100.

[0047] In some embodiments, the top of the tank body 200 is provided with a foam outlet 230, and the flotation machine 10 further comprises a scraper structure 300 arranged at the top of the tank body 200, and the stirring device 100 is configured to form a foam layer 400 of a predetermined thickness from the pulp, and the scraper structure 300 is configured to scrape the foam layer 400 out of the tank body 200 through the foam outlet 230. The scraper structure 300 can be any one of the prior art, which plays a role in scraping the foam layer 400 out of the tank body 200, thereby realizing the collection of separated materials. The scraper structure 300 generally comprises a driving structure and a plurality of scrapers connected to the driving structure, and under the driving of the driving structure, the plurality of scrapers constantly rotate, thereby realizing the scraping of the foam layer. It is easy to understand that, since the foam layer 400 is located at the top layer of the pulp, the opening and closing of the pulp inlet 210 and the pulp outlet 220 can also be controlled, thereby controlling the liquid level of the pulp in the tank body 200, and then making the foam layer 400 overflow out of the tank body 200 through the foam outlet 230 by the overflow of the pulp itself.

[0048] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A stirring device for use in a flotation machine, characterized in that The stirring device comprises: a central cylinder comprising a lower cylinder body with openings at the top and bottom, an upper cylinder body with an opening at the lower end, and a partition plate for connecting the lower cylinder body and the upper cylinder body, the outer wall of the lower cylinder body is provided with an air inlet; an air inlet pipe in communication with the air inlet; a main shaft, one end of which extends out of the upper cylinder body, the other end of which extends out of the lower cylinder body in sequence through the upper cylinder body, the partition plate and the lower cylinder body, and the end of the main shaft close to the lower cylinder body is provided with an impeller; and a driving structure, the output end of which is connected to one end of the main shaft close to the upper cylinder body for driving the main shaft to rotate.

2. The stirring device according to claim 1, characterized in that The middle part of the partition plate is provided with a first mounting hole; The stirring device further comprises a first bearing, which is installed in the first mounting hole and sleeved on the outer wall of the main shaft.

3. The stirring device of claim 2, wherein The top of the upper cylinder body is provided with a second mounting hole; The stirring device further comprises a second bearing, which is installed in the second mounting hole and sleeved on the outer wall of the main shaft.

4. The stirring device of claim 1, wherein The partition plate is a flange blind plate.

5. The stirring device of claim 1, wherein The thickness of the partition plate is greater than or equal to 10 mm and less than or equal to 100 mm.

6. The stirring device of claim 1, wherein The stirring device further comprises a stator structure, which comprises a connecting plate and a plurality of guide vanes arranged at the edge of the lower surface of the connecting plate, the upper surface of the connecting plate is connected with the lower cylinder body, and the guide vanes are located outside the impeller.

7. The stirring device of claim 1, wherein The stirring device further comprises a shaft coupling and / or a speed reducer for connecting the driving structure and the main shaft.

8. A flotation machine characterized in that, A flotation machine comprising a tank body with a pulp inlet and a pulp outlet, and a stirring device as claimed in any one of claims 1-7, the inside of the tank body has a containing cavity for containing the stirring device.

9. The flotation machine of claim 8, characterized in that The top of the tank body is provided with a foam outlet, and the flotation machine further comprises a scraper structure arranged at the top of the tank body, the stirring device is configured to form a foam layer with a predetermined thickness from the pulp liquid, and the scraper structure is configured to scrape the foam layer out of the tank body through the foam outlet.

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