Sieve plate device of flotation column
By designing a three-layer screen plate with intervals in the flotation column, the problem of uneven collision between micro bubbles and medium ore slurry in the prior art is solved, and the flotation concentrate yield and flotation effect are improved.
Patent Information
- Application Number
- CN202421483473.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The screening device of the existing flotation column causes uneven collisions between rising microbubbles and falling medium ore slurry, resulting in low flotation concentrate yield and poor flotation effect.
A screen plate device including upper, middle and lower screen plates is designed. The spacing and apertures of the screen plates are different. The distance between the upper screen plate and the overflow weir is 1000 mm to 1200 mm, the distance between the middle screen plate and the upper screen plate is 400 mm to 500 mm, and the distance between the lower screen plate and the middle screen plate is also 400 mm to 500 mm.
Through the three-layer screen plates arranged at intervals, the uniformity of the countercurrent collision between the micro bubbles and the medium ore slurry is improved, and the concentrate yield and flotation effect are improved.
Smart Images
Figure CN222817028U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flotation, in particular to a sieve plate device of a flotation column. Background Art
[0002] Flotation column is a kind of high-efficiency and energy-saving mineral processing equipment, which is widely used in mineral processing, metallurgy, coal cleaning and other industries. Usually, the flotation column generally includes: cylindrical barrel, aerator, ore feeding device, foam overflow or scraping device, compressed air input system and tailings discharge system.
[0003] The existing sieve plate device of the flotation column has the following main problems: the sieve plates are generally two layers, the distance between the sieve plates is large, the upper sieve plate is close to the overflow weir, and the lower sieve plate is close to the bottom cyclone port, resulting in uneven countercurrent collision between the rising microbubbles and the descending medium ore pulp, low flotation concentrate yield, and poor flotation effect. Utility Model Content
[0004] (I) The problem to be solved by the utility model is that the existing screen plate device causes uneven countercurrent collision between rising microbubbles and descending medium ore pulp, resulting in low flotation concentrate yield and poor flotation effect.
[0005] (II) Technical solution
[0006] In order to solve the above technical problems, the embodiment of the utility model provides a sieve plate device of a flotation column, the flotation column comprises a column body, a concentrate collecting device and a tailings discharging device, the concentrate collecting device comprises an overflow weir arranged in the column body, and the tailings discharging device is arranged in the column body;
[0007] The sieve plate device comprises: an upper sieve plate, a middle sieve plate and a lower sieve plate;
[0008] The upper sieve plate, the middle sieve plate and the lower sieve plate are sequentially arranged in the column from top to bottom and are located between the overflow weir and the tailings discharge device;
[0009] The upper sieve plate is provided with a plurality of first through holes, the middle sieve plate is provided with a plurality of second through holes, and the lower sieve plate is provided with a plurality of third through holes;
[0010] The diameters of the first through hole, the second through hole and the third through hole are all different, and the porosity of the first through hole on the upper sieve plate, the porosity of the second through hole on the middle sieve plate and the porosity of the third through hole on the lower sieve plate are also different.
[0011] Furthermore, the distance between the upper sieve plate and the overflow weir is L, wherein 1000mm≤L≤1200mm.
[0012] Furthermore, the distance between the middle sieve plate and the upper sieve plate is M, wherein 400mm≤M≤500mm.
[0013] Furthermore, the distance between the lower sieve plate and the middle sieve plate is N, wherein 400mm≤N≤500mm.
[0014] Furthermore, the aperture of the first through hole is d1, wherein 14 mm ≤ d1 ≤ 16 mm.
[0015] Furthermore, the opening rate of the first through holes on the upper sieve plate is 60%-70%.
[0016] Furthermore, the aperture of the second through hole is d2, wherein 12 mm ≤ d2 ≤ 14 mm.
[0017] Furthermore, the opening rate of the second through holes on the middle sieve plate is 50%-60%.
[0018] Furthermore, the aperture of the third through hole is d3, wherein 10 mm ≤ d3 ≤ 12 mm.
[0019] Furthermore, the opening rate of the third through holes on the lower sieve plate is 40%-50%.
[0020] Beneficial effects of the utility model:
[0021] The utility model provides a sieve plate device of a flotation column, the flotation column comprises a column body, a concentrate collecting device and a tailings discharging device, the concentrate collecting device comprises an overflow weir arranged in the column body, and the tailings discharging device is arranged in the column body; the sieve plate device comprises: an upper sieve plate, a middle sieve plate and a lower sieve plate; the upper sieve plate, the middle sieve plate and the lower sieve plate are sequentially arranged in the column body from top to bottom, and are located between the overflow weir and the tailings discharging device; a plurality of first through holes are provided on the upper sieve plate, a plurality of second through holes are provided on the middle sieve plate, and a plurality of third through holes are provided on the lower sieve plate; the diameters of the first through holes, the second through holes and the third through holes are all different, and the opening rate of the first through holes on the upper sieve plate, the opening rate of the second through holes on the middle sieve plate and the opening rate of the third through holes on the lower sieve plate are also all different.
[0022] By arranging the upper sieve plate, the middle sieve plate and the lower sieve plate at intervals in the column, the uniformity of the countercurrent collision between the rising microbubbles and the descending medium ore pulp can be improved, the yield of the concentrate can be improved, and the flotation effect can be improved. The aperture of the first through hole on the upper sieve plate, the aperture of the second through hole on the middle sieve plate and the aperture of the third through hole on the lower sieve plate are not systematic, and the opening rate of the first through hole on the upper sieve plate, the opening rate of the second through hole on the middle sieve plate and the opening rate of the third through hole on the lower sieve plate are also different, which can facilitate the passage of the rising concentrate foam, further improve the yield of the concentrate, and further improve the flotation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic diagram of the structure of a flotation column with a sieve plate device provided in an embodiment of the utility model;
[0025] Figure 2 A schematic diagram of the partial structure of the upper sieve plate provided in an embodiment of the utility model.
[0026] Icons: 11- slurry pre-processor; 12- concentrate collecting device; 13- feeding device; 14- middling cyclone device; 15- tailings discharging device; 16- middling distributor; 17- microbubble generator; 19- column; 21- upper sieve plate; 211- first through hole; 22- middle sieve plate; 23- lower sieve plate. DETAILED DESCRIPTION
[0027] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] like Figure 1 and Figure 2As shown, one embodiment of the utility model provides a sieve plate device of a flotation column, the flotation column includes a column 19, a concentrate collecting device 12 and a tailings discharging device 15, the concentrate collecting device 12 includes an overflow weir arranged in the column 19, and the tailings discharging device 15 is arranged in the column 19; the sieve plate device includes: an upper sieve plate 21, a middle sieve plate 22 and a lower sieve plate 23; the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23 are arranged in the column 19 from top to bottom in sequence, and Located between the overflow weir and the tailings discharge device 15; a plurality of first through holes 211 are opened on the upper sieve plate 21, a plurality of second through holes are opened on the middle sieve plate 22, and a plurality of third through holes are opened on the lower sieve plate 23; the diameters of the first through holes 211, the second through holes and the third through holes are all different, and the porosity of the first through holes 211 on the upper sieve plate 21, the porosity of the second through holes on the middle sieve plate 22 and the porosity of the third through holes on the lower sieve plate 23 are also different.
[0029] In this embodiment, the sieve plate device is applied to the flotation column, wherein the flotation column includes a column 19, a pulp preprocessor 11, a concentrate collecting device 12, a feeding device 13, a middling cyclone device 14, a tailings discharging device 15, a middling distributor 16, and a micro-bubble generator 17. During use, the feed pulp is fully mixed with the reagent in the pulp preprocessor 11, and then enters the column 19 through the feeding device 13 and fully counter-currently collides with the rising micro-bubbles distributed on the cross section of the column 19, and the lighter concentrate overflows from the overflow weir of the concentrate collecting device 12 above the column 19 in an overflow manner, and the heavier tailings are discharged through the tailings discharging device 15 located at the bottom of the column 19. In order to improve the concentrate recovery rate, the middling slurry is transported from the middle of the column 19 to the middling distributor 16 above through the middling circulation pump, and then transported to the microbubble generator 17 through multiple branch pipes by the middling distributor 16, and then transported to the middling cyclone device 14 to form a cyclone force field. The lighter flotation clean coal cyclones up, and the heavier tailings cyclones to the bottom of the main body under the action of gravity, enter the tailings discharge tank through static pressure, and then are discharged to the tailings barrel.
[0030] The sieve plate device of the flotation column provided in this embodiment includes three layers of sieve plates, specifically an upper sieve plate 21, a middle sieve plate 22 and a lower sieve plate 23. The upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23 are all arranged in the column 19, and the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23 are arranged in sequence from top to bottom. Optionally, the outer edges of the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23 can be fixed to the inner wall of the column 19 by welding, riveting, clamping or bolting, or a supporting structure such as a support frame can be arranged in the column 19 to support the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23. In this embodiment, by arranging three layers of sieve plates, namely, an upper sieve plate 21, a middle sieve plate 22 and a lower sieve plate 23 in the column 19, the uniformity of the countercurrent collision between the rising microbubbles and the descending medium ore pulp can be improved, the concentrate yield can be improved, and the flotation effect can be improved.
[0031] Furthermore, in this embodiment, in order to realize the functions of the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23, a plurality of first through holes 211 are provided on the upper sieve plate 21 to allow liquid to flow through, a plurality of second through holes are provided on the middle sieve plate 22 to allow liquid to flow through, and a plurality of third through holes are provided on the lower sieve plate 23 to allow liquid to flow through. Moreover, the apertures of the first through holes 211 on the upper sieve plate 21, the apertures of the second through holes on the middle sieve plate 22 and the apertures of the third through holes on the lower sieve plate 23 are not systematic, and the opening rates of the first through holes 211 on the upper sieve plate 21, the opening rates of the second through holes on the middle sieve plate 22 and the opening rates of the third through holes on the lower sieve plate 23 are also different, so as to facilitate the passage of the rising concentrate foam, improve the concentrate yield and improve the flotation effect.
[0032] The sieve plate device of the flotation column provided in this embodiment can improve the uniformity of the countercurrent collision between the rising microbubbles and the descending medium ore pulp by arranging the upper sieve plate 21, the middle sieve plate 22 and the lower sieve plate 23 at intervals in the column body 19, thereby improving the yield of the concentrate and the flotation effect. The aperture of the first through hole 211 on the upper sieve plate 21, the aperture of the second through hole on the middle sieve plate 22 and the aperture of the third through hole on the lower sieve plate 23 are not systematic, and the opening rate of the first through hole 211 on the upper sieve plate 21, the opening rate of the second through hole on the middle sieve plate 22 and the opening rate of the third through hole on the lower sieve plate 23 are also different, so that it is conducive to the passage of the rising concentrate foam, further improving the yield of the concentrate and further improving the flotation effect.
[0033] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the distance between the upper sieve plate 21 and the overflow weir is L, wherein 1000mm≤L≤1200mm.
[0034] In this embodiment, the distance between the upper sieve plate 21 and the top concentrate collecting device 12 is greater than or equal to 1000 mm and less than or equal to 1200 mm, so as to avoid the distance between the upper sieve plate 21 and the overflow weir being too close, thereby affecting the collision of the rising microbubbles with the descending middle ore pulp, improving the flotation concentrate yield, and improving the flotation effect.
[0035] For example, in this embodiment, the distance L between the upper sieve plate 21 and the overflow weir may be 1000 mm, 1100 mm, or 1200 mm.
[0036] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the distance between the middle sieve plate 22 and the upper sieve plate 21 is M, wherein 400mm≤M≤500mm.
[0037] In this embodiment, the distance between the middle sieve plate 22 and the upper sieve plate 21 is greater than or equal to 400 mm and less than or equal to 500 mm, so that the countercurrent collision between the rising microbubbles and the descending medium ore pulp is more uniform, thereby improving the flotation concentrate yield and the flotation effect.
[0038] For example, in this embodiment, the distance M between the middle sieve plate 22 and the upper sieve plate 21 may be 400 mm, 450 mm, or 500 mm.
[0039] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the distance between the lower sieve plate 23 and the middle sieve plate 22 is N, wherein 400mm≤N≤500mm.
[0040] In this embodiment, the distance between the lower sieve plate 23 and the middle sieve plate 22 is greater than or equal to 400 mm and less than or equal to 500 mm, so as to avoid the distance between the lower sieve plate 23 and the cyclone port of the bottom tailings discharge device 15 being too close, thereby affecting the collision of the rising microbubbles with the descending middle ore pulp, improving the flotation concentrate yield, and improving the flotation effect.
[0041] For example, in this embodiment, the distance N between the lower sieve plate 23 and the middle sieve plate 22 may be 400 mm, 450 mm, or 500 mm.
[0042] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the aperture of the first through hole 211 is d1, wherein 14 mm≤d1≤16 mm.
[0043] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the opening rate of the first through holes 211 on the upper sieve plate 21 is 60%-70%.
[0044] In this embodiment, the aperture of the first through hole 211 and the opening ratio of the upper sieve plate 21 are set according to the above constraints, so that the rising concentrate foam is subject to less resistance, the concentrate foam can pass quickly, and the recovery rate of the flotation concentrate is improved.
[0045] For example, in this embodiment, the diameter d1 of the first through hole 211 may be 14 mm, 15 mm or 16 mm.
[0046] In this embodiment, the porosity refers to the ratio of the total area of open holes to the total area of the area or structure in a specific area or structure, usually expressed as a percentage. The porosity of the first through hole 211 on the upper sieve plate 21 is greater than or equal to 60%, and less than or equal to 70%. For example, the porosity of the first through hole 211 on the upper sieve plate 21 can be 60%, 65%, or 70%. When setting, it should be noted that the porosity of the first through hole 211 on the upper sieve plate 21 cannot be the same as the porosity of the middle sieve plate 22 and the lower sieve plate 23; similarly, the porosity of the middle sieve plate 22 and the porosity of the lower sieve plate 23 cannot be the same as the porosity of the other two sieve plates.
[0047] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the aperture of the second through hole is d2, wherein 12 mm≤d2≤14 mm.
[0048] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the opening rate of the second through holes on the middle sieve plate 22 is 50%-60%.
[0049] In this embodiment, the aperture of the second through hole and the opening ratio of the middle sieve plate 22 are set according to the above constraints, so that the rising concentrate foam is subject to less resistance, the concentrate foam can pass quickly, and the recovery rate of the flotation concentrate is improved.
[0050] For example, in this embodiment, the diameter d2 of the second through hole may be 12 mm, 13 mm or 14 mm.
[0051] In this embodiment, the porosity of the second through hole on the middle sieve plate 22 is greater than or equal to 50% and less than or equal to 60%. For example, the porosity of the first through hole 211 on the upper sieve plate 21 can be 50%, 55% or 60%.
[0052] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the aperture of the third through hole is d3, wherein 10mm≤d3≤12mm.
[0053] In the sieve plate device of the flotation column provided by the embodiment of the utility model, the opening rate of the third through holes on the lower sieve plate 23 is 40%-50%.
[0054] In this embodiment, since the rising middling ore pulp has greater kinetic energy, the aperture of the third through hole and the opening rate of the lower screen plate 23 are set according to the above constraints, which can play a certain blocking role on the middling ore pulp, so that the middling ore pulp can be evenly distributed on the cross-section of the flotation column body 19, so that it can collide with the descending ore pulp in countercurrent, thereby improving the recovery rate of the flotation concentrate and improving the flotation effect.
[0055] For example, in this embodiment, the diameter d3 of the third through hole may be 10 mm, 11 mm or 12 mm.
[0056] In this embodiment, the porosity of the third through hole on the lower sieve plate 23 is greater than or equal to 40% and less than or equal to 50%. For example, the porosity of the first through hole 211 on the upper sieve plate 21 can be 40%, 45% or 50%.
[0057] Optionally, another embodiment of the present invention further provides a flotation column, comprising the sieve plate device of the flotation column described in any of the above embodiments.
[0058] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0059] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.
[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A sieve plate device for a flotation column, the flotation column comprising a column body (19), a concentrate collecting device (12) and a tailings discharging device (15), the concentrate collecting device (12) comprising an overflow weir arranged in the column body (19), and the tailings discharging device (15) being arranged in the column body (19); It is characterized in that The sieve plate device comprises: an upper sieve plate (21), a middle sieve plate (22) and a lower sieve plate (23); The upper sieve plate (21), the middle sieve plate (22) and the lower sieve plate (23) are sequentially arranged in the column (19) at intervals from top to bottom, and are located between the overflow weir and the tailings discharge device (15); The upper sieve plate (21) is provided with a plurality of first through holes (211), the middle sieve plate (22) is provided with a plurality of second through holes, and the lower sieve plate (23) is provided with a plurality of third through holes; The diameters of the first through hole (211), the second through hole and the third through hole are all different, and the porosity of the first through hole (211) on the upper sieve plate (21), the porosity of the second through hole on the middle sieve plate (22) and the porosity of the third through hole on the lower sieve plate (23) are also different.
2. The sieve plate device of the flotation column according to claim 1, characterized in that: The distance between the upper sieve plate (21) and the overflow weir is L, wherein 1000 mm ≤ L ≤ 1200 mm.
3. The sieve plate device of the flotation column according to claim 1, characterized in that: The distance between the middle sieve plate (22) and the upper sieve plate (21) is M, wherein 400 mm ≤ M ≤ 500 mm.
4. The sieve plate device of the flotation column according to claim 1, characterized in that: The distance between the lower sieve plate (23) and the middle sieve plate (22) is N, wherein 400 mm ≤ N ≤ 500 mm.
5. The sieve plate device of the flotation column according to claim 1, characterized in that: The aperture of the first through hole (211) is d1, wherein 14 mm≤d1≤16 mm.
6. The sieve plate device of the flotation column according to claim 1, characterized in that: The opening rate of the first through holes (211) on the upper sieve plate (21) is 60%-70%.
7. The sieve plate device of the flotation column according to claim 1, characterized in that: The aperture of the second through hole is d2, wherein 12 mm≤d2≤14 mm.
8. The sieve plate device of the flotation column according to claim 1, characterized in that: The opening rate of the second through holes on the middle sieve plate (22) is 50%-60%.
9. The sieve plate device of the flotation column according to claim 1, characterized in that: The aperture of the third through hole is d3, wherein 10 mm≤d3≤12 mm.
10. The sieve plate device of the flotation column according to claim 1, characterized in that: The opening rate of the third through holes on the lower sieve plate (23) is 40%-50%.