An oily beneficiation reagent dispersing apparatus

Abstract

The utility model discloses an oily mineral separation reagent dispersion equipment, including driving part, hollow shaft, reagent self -suction chamber and negative pressure stirring chamber, the negative pressure stirring chamber includes the impeller of having the cavity inside and is located below the ore pulp liquid level, the driving part passes through the hollow shaft and drives the rotation of impeller, the upper portion of hollow shaft is equipped with the entrance, and the lower portion of hollow shaft is equipped with the export, the entrance is linked together with reagent self -suction chamber, and the export is linked together with negative pressure stirring chamber, the blade of impeller is arranged with the discharge channel along the radial direction of impeller, and the discharge channel is linked together with the cavity of impeller and hollow shaft export, and the reagent self -suction chamber reaches negative pressure stirring chamber through hollow shaft from reagent, and finally through the discharge channel on the blade of impeller and enters the ore pulp, and is broken into micron -sized oil drop under the hydrofoil cavitation effect that the rotation of impeller produces. The utility model has the advantages of small, high reagent mixing efficiency, simple structure.

Description

Technical Field

[0001] This utility model relates to the field of flotation technology, and in particular to a dispersion device for oily mineral processing reagents. Background Technology

[0002] Flotation, as a conventional mineral processing and enrichment method, is widely used in various mines. To mitigate the surface physicochemical differences between valuable minerals and gangue minerals, various mineral processing reagents need to be added during the flotation process. These reagents are mostly oil-based polar / non-polar reagents, and are typically added via gravity-fed pumping. However, gravity-fed reagents exhibit poor dispersion, and oil-based reagents often exist as large droplets in the slurry, generally on the millimeter scale. Studies have shown that valuable mineral particles are mostly micrometer-sized in the slurry, and only 30% of their surface area needs to be in contact with the reagent for effective enrichment. Therefore, traditional gravity-fed reagent addition methods result in low reagent utilization, especially in low-temperature, high-humidity environments, leading to large reagent consumption and placing an additional burden on subsequent operations. Specific problems include: 1. Poor drug dispersion performance results in low drug adsorption efficiency and large drug usage; 2. The reaction between the reagent and the mineral is delayed, which increases the amount of reagent used for subsequent mineral selective separation and reduces the sorting efficiency of subsequent operations; 3. Coarse particles with poor dissociation cannot effectively interact with the reagent, resulting in the loss of valuable minerals.

[0003] To effectively disperse reagents and ensure they exist at the micron level in the slurry, traditional concentrators often extend the mixing time in the slurry preparation tank and add chemical dispersants. However, extending the mixing time requires constructing a larger slurry preparation tank, which is costly and difficult to modify if the concentrators change later. Chemical dispersants are expensive, have poor applicability, and have collateral effects on downstream concentrators that are difficult to control. All of these methods have significant drawbacks, and many problems need to be solved.

[0004] Chinese patent document CN204320459U discloses a slurry pretreatment system for enhancing flotation reagent dispersion. After adding reagents via jet injection, a double impeller (large and small) agitates and cuts the liquid phase to improve reagent dispersion, thereby increasing reagent efficiency and reducing reagent consumption. However, this system requires significant modifications to existing flotation systems in concentrators, resulting in high retrofit costs. Furthermore, the double impeller agitation does not further reduce the reagent particle size, and clogging is highly likely when mixing reagents and slurry via the jet injector. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an oily mineral processing reagent dispersion device with small reagent distribution particle size and simple structure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An oil-based mineral processing reagent dispersion device includes a drive unit, a hollow shaft, a reagent self-priming chamber, a support chamber, and a negative pressure stirring chamber. The drive unit is located on the surface of the slurry. The reagent self-priming chamber is located between the negative pressure stirring chamber and the drive unit. The negative pressure stirring chamber includes an impeller with an internal cavity and is located below the surface of the slurry. The hollow shaft passes through the reagent self-priming chamber and is connected to the impeller. The drive unit drives the impeller to rotate through the hollow shaft. The upper part of the hollow shaft has an inlet, and the lower part of the hollow shaft has an outlet. The inlet is connected to the reagent self-priming chamber. The impeller blades have discharge channels arranged along the radial direction of the impeller. The discharge channels are connected to the outlet. The reagent reaches the slurry from the reagent self-priming chamber through the hollow shaft and the discharge channels.

[0007] As a further improvement to the above technical solution: the discharge channel is arc-shaped and arranged along the edge of the blade.

[0008] The discharge channel is located at the trailing edge of the blade.

[0009] It also includes a support chamber, which includes a sleeve. The upper part of the sleeve is sealed to the drug self-priming chamber, and the lower part is sealed to the negative pressure stirring chamber.

[0010] It also includes a mechanical seal, through which the sleeve is sealed to the drug self-priming chamber.

[0011] The drug self-priming chamber has a drug inlet on its side, and the drug inlet is connected to the drug source.

[0012] The driving component includes a drive motor and a mounting base. The drive motor is mounted on the mounting base, and the mounting base is connected to the drug self-priming chamber.

[0013] It also includes bearings, with the top of the hollow shaft connected to the output end of the drive motor and the upper part connected to the mounting base via bearings.

[0014] The lower part of the hollow shaft is connected to the support chamber via a bearing.

[0015] The inner diameter r of the discharge channel and the inner diameter R of the hollow shaft center hole satisfy the condition: r≦0.46R.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to an oil-based mineral processing reagent dispersion device, installed on a slurry preparation tank. The reagent enters the reagent self-priming chamber, and a drive unit rotates a hollow shaft and impeller at high speed. As the impeller rotates at high speed in the slurry, it centrifugally accelerates the reagent inside the discharge channel. Simultaneously, hydrofoil cavitation is generated at the distal edge of the impeller, jetting the reagent into the slurry. In the hydrofoil cavitation area, the reagent is dispersed to the micron level by the shock waves from cavitation collapse. Combined with the impeller's stirring of the slurry, the reagent ultimately forms micron-sized droplets that are uniformly mixed with the slurry. This invention features a simple structure, low manufacturing cost, and convenient installation. The high-speed rotating hollow shaft provides the driving force for the reagent's movement, resulting in a small output reagent particle size distribution, high reagent mixing efficiency, and a reduced chance of clogging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the utility model in use.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the impeller structure.

[0020] Figure 4 This is a schematic diagram of the hollow shaft.

[0021] The labels in the diagram represent: 1. Drive component; 11. Drive motor; 12. Mounting base; 2. Hollow shaft; 21. Inlet; 22. Outlet; 3. Chemical self-priming chamber; 31. Chemical inlet; 4. Support chamber; 41. Sleeve; 5. Negative pressure mixing chamber; 51. Impeller; 511. Blade; 512. Discharge channel; 6. Mechanical seal; 7. Bearing. Detailed Implementation

[0022] The present invention will be further described in detail below. Unless otherwise specified, the instruments or materials used in the present invention are commercially available.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] like Figures 1 to 4 As shown, the oil-based mineral processing reagent dispersion device of this embodiment includes a drive unit 1, a hollow shaft 2, a reagent self-priming chamber 3, and a negative pressure stirring chamber 5. The drive unit 1 is located on the surface of the slurry, and the reagent self-priming chamber 3 is located between the negative pressure stirring chamber 5 and the drive unit 1. The negative pressure stirring chamber 5 includes an impeller 51 with an internal cavity and is located below the surface of the slurry. The hollow shaft 2 passes through the reagent self-priming chamber 3 and is connected to the impeller 51. The drive unit 1 drives the impeller 51 to rotate through the hollow shaft 2. The upper part of the hollow shaft 2 is provided with an inlet 21, and the lower part of the hollow shaft 2 is provided with an outlet 22. The inlet 21 is connected to the reagent self-priming chamber 3. The blades 511 of the impeller 51 have a discharge channel 512 arranged along the radial direction of the impeller 51. The discharge channel 512 is connected to the outlet 22. The reagent enters the slurry from the reagent self-priming chamber 3 through the hollow shaft 2 and the discharge channel 512.

[0027] This utility model discloses an oily mineral processing reagent dispersion device, which is installed on a slurry preparation tank. The reagent enters through the reagent inlet 31. The drive component 1 drives the hollow shaft 2 and impeller 51 to rotate at high speed. The negative pressure generated by the rotation of the hollow shaft 2 and impeller 51 enables the reagent self-absorption chamber 3 to self-absorb the reagent from the reagent source. During the process of the reagent moving from the reagent self-absorption chamber 3 to the negative pressure mixing chamber 5, the reagent movement is accelerated due to the rotation of the hollow shaft 2. When the impeller 51 rotates at high speed in the slurry, it centrifugally accelerates the reagent inside the discharge channel 512. At the same time, hydrofoil cavitation is generated at the far edge of the impeller 51. Under the action of centrifugal force, the reagent jet enters the slurry. The reagent is dispersed to the micron level by the shock wave of cavitation collapse in the hydrofoil cavitation area. With the stirring of the slurry by the impeller 51, the reagent finally forms micron-sized droplets and is uniformly mixed with the slurry. This invention has a simple structure, small output reagent particle size, high reagent mixing efficiency, low manufacturing cost, and convenient installation. It is suitable for water-insoluble oily reagents in flotation oily mineral processing reagents.

[0028] like Figure 3 As shown, the discharge channel 512 is arc-shaped and arranged along the edge of the blade 511. The discharge channel 512 is located at the trailing edge of the blade 511, with a rotational speed ≥900 r / min, forming a Venturi jet structure. In this embodiment, the discharge channel 512 is a curved conical tube. The small opening of the conical tube can enhance the intensity of the reagent jet, which helps to form a larger pressure difference after the reagent enters the slurry, intensifies the cavitation effect, and avoids the slurry clogging the reagent outlet.

[0029] The number of blades 511 is not less than 3, and in this embodiment there are three blades. The tapered tube is connected to the hollow hub cavity of the impeller 51, and the tapered tube is located on the edge of the short arc side of the blade 511.

[0030] like Figure 1 and Figure 2 As shown, this embodiment also includes a support chamber 4, which includes a sleeve 41. The upper part of the sleeve 41 is sealed to the reagent self-priming chamber 3, and the lower part is sealed to the negative pressure stirring chamber 5. The sleeve 41 serves as an acceleration channel for the reagent. By sealing the sleeve 41 to the reagent self-priming chamber 3, the reagent is only allowed to pass through the hollow shaft 2 and cannot escape from the cavity of the sleeve 41. This design allows for better reagent acceleration. Since slurry splashing onto the drive component 1 can shorten its service life, this invention expands the distance between the drive component 1 and the slurry by providing the support chamber 4, preventing the slurry from affecting the use of the drive component 1.

[0031] In this embodiment, a mechanical seal 6 is also included, and the sleeve 41 is sealed to the reagent self-priming chamber 3 via the mechanical seal 6. In this embodiment, the sleeve 41 is sealed to the negative pressure stirring chamber 5 via the mechanical seal 6, and the sealed connection prevents the slurry from flowing from the inside of the sleeve 41 into the reagent self-priming chamber 3. like Figure 2 As shown, the drug self-priming chamber 3 has a cylindrical structure and a drug inlet 31 is provided on the side, which is connected to the drug source.

[0032] like Figure 2 As shown, the drive unit 1 includes a drive motor 11 and a mounting base 12. The drive motor 11 is mounted on the mounting base 12, and the mounting base 12 is connected to the drug self-priming chamber 3.

[0033] The output shaft of the drive motor 11 is installed on the mounting base 12. There is a packing seal between the output shaft and the mounting base 12. The mounting base 12 is used as a sealing cover for the self-priming chamber 3 of the medicine while installing the motor output power.

[0034] It also includes a bearing 7. The top of the hollow shaft 2 is connected to the output end of the drive motor 11, and the upper part is connected to the mounting base 12 via the bearing 7. The lower part of the hollow shaft 2 is connected to the support chamber 4 via the bearing 7.

[0035] like Figure 2 As shown, the sleeve 41 is installed below the drug self-priming chamber 3, and a pair of bearings 7 are installed inside to cooperate with the hollow shaft 2 to limit the runout when the hollow shaft 2 rotates at high speed.

[0036] In this embodiment, the drive motor 11 is a variable frequency motor, and the bearing 7 is mounted on the mounting base 12. The bearing 7 is held in place by the upper end of the hollow shaft 2 and installed at the center of the bottom surface of the mounting base 12. The output shaft of the variable frequency motor is inserted into the inner cavity of the hollow shaft 2 and connected by a flat key. The connection end between the hollow shaft 2 and the output shaft is sealed to prevent pressure leakage. The inner cavity of the upper end of the hollow shaft 2 is enlarged and machined with a flat keyway. The end of the hole is further threaded inward and sealed with a set screw. The lower end of the hollow shaft 2 is connected to the hollow hub of the blade 511 through a pipe thread and locked with a lock nut to prevent it from falling off.

[0037] In this embodiment, the inner diameter r of the discharge channel 512 and the inner diameter R of the central hole of the hollow shaft 2 satisfy: r≦0.46R.

[0038] The negative pressure mixing chamber 5 includes an end cover and a protective net. The end cover forms a mechanical seal structure with the sleeve 41 through a mechanical seal 6. The protective net is set on the end cover and is arranged around the outer circumference of the blade 511. The protective net is used to remove foreign objects such as tree branches present in the slurry and to protect the blade 511. In this embodiment, the end cover has external threads for installing the protective net of the impeller 51. The hollow shaft 2 passes through the end cover and is connected to the blade 511.

[0039] In use, the negative pressure mixing chamber 5 is inserted below the surface of the slurry to thoroughly mix the water and oil-based reagents, forming an emulsion which is then added to the reagent source. The drive unit 1 is then activated to begin dispersing the reagents. The equipment is installed on the slurry channel, with the hollow impeller 51 completely submerged in the slurry to a depth of at least 20 cm. For viscous, oily, or grease-like reagents, the reagent source can be increased. Using it in conjunction with an ultrasonic stirring rod or a static mixer will yield better results.

[0040] A rare earth mine in Sichuan Province used hydroxyammonia fatty acid collectors to separate barite and fluorite mixed rare earth concentrates. Due to the mine's location in the Liangshan Mountains of Sichuan, with low temperatures and high altitude, the reagents were added using a heated and stirred method. The reagent usage was 800 g / t in summer and 1300 g / t in winter, with a rare earth concentrate recovery rate of 85%. The high reagent usage in winter was due to inefficient dispersion caused by low temperatures, resulting in a lard-like appearance on-site. Using the equipment of this invention, installed above the flotation slurry preparation tank, with a rotation speed of 900 rpm and a slurry immersion depth of 1 meter, the hydroxyammonia fatty acid reagent usage was 500 g / t in summer and 550 g / t in winter, while the rare earth concentrate recovery rate remained unchanged. This example demonstrates the significant effectiveness of this invention for fatty acid-based ester-like collectors.

[0041] A copper-molybdenum separation flotation plant in Jiangxi Province used sodium sulfide, kerosene, water glass, and sodium hexametaphosphate as molybdenum ore collectors, achieving a comprehensive molybdenum recovery rate of 78%. Among these four collectors, kerosene, being an oily collector, was added in a relatively large quantity (500 g / t). This new device is installed above the feed mixing sluice, rotating at 1500 rpm, with a slurry immersion depth of 0.5 meters. After the reagents and slurry are mixed, they directly enter the flotation column. After the modification, the flotation froth condition was significantly improved, the kerosene consumption was reduced to 300 g / t, and the comprehensive molybdenum recovery rate increased to 81%, creating significant economic benefits for the plant. This example demonstrates the significant effectiveness of this new device for oily collectors.

[0042] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A dispersion device for oily mineral processing reagents, characterized in that: The device includes a drive unit (1), a hollow shaft (2), a reagent self-priming chamber (3), and a negative pressure stirring chamber (5). The drive unit (1) is located on the surface of the slurry. The reagent self-priming chamber (3) is located between the negative pressure stirring chamber (5) and the drive unit (1). The negative pressure stirring chamber (5) includes an impeller (51) with an internal cavity and is located below the surface of the slurry. The hollow shaft (2) passes through the reagent self-priming chamber (3) and is connected to the impeller (51). The drive unit (1) drives the impeller (51) to rotate through the hollow shaft (2). The hollow shaft (2) has an inlet (21) at the top and an outlet (22) at the bottom. The inlet (21) is connected to the reagent self-absorption chamber (3). The impeller (51) has a discharge channel (512) arranged on the blades (511) along the radial direction of the impeller (51). The discharge channel (512) is connected to the outlet (22) and the slurry. The reagent enters the slurry from the reagent self-absorption chamber (3) through the hollow shaft (2) and the discharge channel (512).

2. The oil-based mineral processing reagent dispersion equipment according to claim 1, characterized in that: The discharge channel (512) is arc-shaped and arranged along the edge of the blade (511).

3. The oil-based mineral processing reagent dispersion equipment according to claim 2, characterized in that: The discharge channel (512) is located at the trailing edge of the blade (511).

4. The oil-based mineral processing reagent dispersion equipment according to any one of claims 1 to 3, characterized in that: It also includes a support chamber (4), which includes a sleeve (41). The upper part of the sleeve (41) is sealed to the drug self-priming chamber (3), and the lower part is sealed to the negative pressure stirring chamber (5).

5. The oil-based mineral processing reagent dispersion equipment according to claim 4, characterized in that: It also includes a mechanical seal (6), through which the sleeve (41) is sealed to the drug self-priming chamber (3).

6. The oil-based mineral processing reagent dispersion equipment according to any one of claims 1 to 3, characterized in that: The drug self-absorption chamber (3) has a drug inlet (31) on its side, and the drug inlet (31) is connected to the drug source.

7. The oil-based mineral processing reagent dispersion equipment according to any one of claims 1 to 3, characterized in that: The drive unit (1) includes a drive motor (11) and a mounting base (12). The drive motor (11) is mounted on the mounting base (12), and the mounting base (12) is connected to the drug self-priming chamber (3).

8. The oil-based mineral processing reagent dispersion equipment according to claim 7, characterized in that: It also includes a bearing (7), the top of the hollow shaft (2) is connected to the output end of the drive motor (11), and the upper part is connected to the mounting base (12) through the bearing (7).

9. The oil-based mineral processing reagent dispersion equipment according to claim 8, characterized in that: The hollow shaft (2) is connected to the support chamber (4) via a bearing (7).

10. The oil-based mineral processing reagent dispersion equipment according to any one of claims 1 to 3, characterized in that: The inner diameter r of the discharge channel (512) and the inner diameter R of the center hole of the hollow shaft (2) satisfy: r≦0.46R.

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