Hybrid flotation system

Abstract

The application provides a mixed flotation system, comprising: a first pipeline sequentially connected with a first cyclone, a second cyclone, a pulp conditioning device and a flotation device; a pulp pipe is connected to a feed inlet of the first cyclone, and the first cyclone is used for performing cyclone classification on copper-molybdenum ore pulp entering from the pulp pipe to obtain first ore pulp and second ore pulp with a particle size larger than the first ore pulp; the second cyclone is used for performing cyclone classification on the second ore pulp entering the second cyclone to obtain third ore pulp and fourth ore pulp with a particle size larger than the third ore pulp; the pulp conditioning device is provided with a feeding opening and a first stirring assembly, and the pulp conditioning device is used for stirring and mixing the third ore pulp entering the pulp conditioning device and pulp conditioning medium entering the pulp conditioning device through the first stirring assembly to obtain fifth ore pulp with a preset concentration; and the flotation device is used for stirring and aerating the fifth ore pulp entering the flotation device to obtain a first target mineral. The application improves the recovery efficiency of the first target mineral.

Description

Technical Field

[0001] This application relates to the field of flotation technology, and more particularly to a hybrid flotation system. Background Technology

[0002] Mixed flotation refers to the process of separating various useful minerals together to form a mixed concentrate when an ore contains two or more valuable minerals and is beneficiated using flotation. Taking the Wushan copper-molybdenum mixed flotation as an example, due to changes in the properties of the Wushan ore, particularly the fundamental alteration of the gangue mineral composition, the content of easily mud-forming mica, sericite, clay minerals such as illite, and kaolinite significantly increases.

[0003] However, the aforementioned gangue minerals easily generate a large amount of slime during grinding. This slime adsorbs a large amount of flotation reagents, leading to adverse effects such as sticky froth, poor fluidity, large middlings circulation, and poor separation efficiency, resulting in a low molybdenum recovery rate after mixed flotation. Based on this, this application proposes a mixed flotation system suitable for the mixed flotation of copper-molybdenum ores. Utility Model Content

[0004] This application provides a hybrid flotation system to solve the technical problems described in the background section.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: This application provides a mixed flotation system, comprising: a primary hydrocyclone, a secondary hydrocyclone, a slurry conditioning device, and a flotation device connected sequentially through a first pipe; The feed inlet of the first-stage hydrocyclone is connected to a slurry pipe, which is used to perform hydrocyclone classification on the copper-molybdenum slurry entering from the slurry pipe to obtain a first slurry and a second slurry with a particle size larger than the first slurry. The secondary hydrocyclone is used to perform hydrocyclone classification on the second slurry entering therein to obtain a third slurry and a fourth slurry with a particle size larger than the third slurry; The slurry preparation device is provided with a feeding port and a first stirring component, which is used to stir and mix the slurry preparation medium entering from the feeding port and the third slurry entering from the feeding port to obtain a fifth slurry of a preset concentration. The flotation device is used to agitate and aerate the fifth slurry entering it in order to obtain the first target mineral.

[0006] Optionally, the slurry preparation device is connected to a first air-inflating pipe, and a first air pump is installed on the first air-inflating pipe.

[0007] Optionally, the flotation device is connected to a second air supply pipe, and a second air pump is installed on the second air supply pipe.

[0008] Optionally, the flotation device is equipped with a second stirring assembly; The second stirring assembly includes a stirring shaft, a stirring wheel, multiple horizontal stirring rods, and a vertical stirring rod; the bottom end of the stirring shaft extends into the flotation device, the stirring wheel is disposed at the bottom end of the stirring shaft, the multiple horizontal stirring rods are disposed at equal intervals from top to bottom on the shaft of the stirring shaft located in the flotation device, and the vertical stirring rod is disposed at the end of the multiple horizontal stirring rods away from the stirring shaft.

[0009] Optionally, the end of the overflow pipe of the first-stage hydrocyclone away from itself is connected to a flotation column, which is used to flotate the first slurry entering from the overflow pipe of the first-stage hydrocyclone to obtain the second target mineral.

[0010] Optionally, the underflow port of the secondary hydrocyclone is connected to a ball mill via a second pipe, and the discharge port of the ball mill is connected to the first pipe between the secondary hydrocyclone and the slurry conditioning device via a third pipe; The third pipeline is equipped with a first metering pump.

[0011] Optionally, a second metering pump is installed on the first pipeline between the slurry preparation device and the flotation device.

[0012] The mixed flotation system provided in this application uses a primary hydrocyclone to classify the copper-molybdenum ore slurry into a first slurry and a second slurry with a particle size larger than the first slurry. The second slurry then enters a secondary hydrocyclone for further classification to obtain a third slurry and a fourth slurry with a particle size larger than the third slurry. The third slurry then enters a slurry conditioning device, where a first stirring component mixes the conditioning medium and the third slurry to obtain a fifth slurry of a preset concentration. Finally, the fifth slurry is agitated and aerated in a flotation device to obtain the first target mineral (e.g., molybdenum ore). In other words, this application uses... The first-stage hydrocyclone separates the smaller particles in the first slurry of the copper-molybdenum ore slurry from the larger particles in the fourth slurry, which is separated by the second-stage hydrocyclone. This results in a third slurry with particles larger than the first slurry but smaller than the fourth slurry. This avoids the problem of the smaller particles in the first slurry easily generating slime during flotation, which affects the recovery rate of the first target mineral, and the problem of the larger particles in the fourth slurry containing unliberated minerals, which results in lower precision of the first target mineral obtained after flotation. Then, the third slurry is adjusted to a fifth slurry with a preset concentration by a slurry conditioning device. The fifth slurry is easier for the flotation device to obtain the first target mineral, thereby improving the recovery efficiency of the first target mineral. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A flowchart of a hybrid flotation system provided in an embodiment of this application; Figure 2 A flowchart of a hybrid flotation system provided in another embodiment of this application; Figure 3 This is a schematic diagram of the structure of a hybrid flotation system provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a hybrid flotation system provided in another embodiment of this application; Figure 5 A schematic diagram of a slurry preparation device provided in an embodiment of this application, which has a feeding port and a first stirring component disposed therein; Figure 6 This is a schematic diagram of a flotation device provided in an embodiment of the present application, which includes a second stirring component.

[0015] In the diagram: 101, First pipe; 1011, Second metering pump; 102, Second pipe; 103, Third pipe; 1031, First metering pump; 200, First-stage hydrocyclone; 201, Slurry pipe; 300, Second-stage hydrocyclone; 400, Slurry preparation device; 401, Feed port; 402, First stirring assembly; 403, First aeration pipe; 4031, First air pump; 500, Flotation device; 501, Second aeration pipe; 5011, Second air pump; 502, Second stirring assembly; 5021, Stirring shaft; 5022, Stirring wheel; 5023, Horizontal stirring rod; 5024, Vertical stirring rod; 600, Flotation column; 700, Ball mill. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0017] refer to Figures 1 to 6This application provides a mixed flotation system, comprising: a primary hydrocyclone 200, a secondary hydrocyclone 300, a slurry conditioning device 400, and a flotation device 500, sequentially connected via a first pipe 101; wherein, the hydrocyclone is a common separation and classification device, commonly using the principle of centrifugal sedimentation. When the two-phase mixture to be separated enters the hydrocyclone tangentially from the periphery at a certain pressure, it generates intense three-dimensional elliptical strong rotational shear turbulence. Due to the size difference between coarse and fine particles, they are subjected to different magnitudes of centrifugal force, centripetal buoyancy, and fluid drag. Under the action of centrifugal sedimentation, most of the coarse particles are discharged through the underflow port of the hydrocyclone, while most of the fine particles are discharged through the overflow pipe, thereby achieving the purpose of separation and classification. The primary hydrocyclone 200 and the secondary hydrocyclone 300 have different specifications.

[0018] The feed inlet of the primary hydrocyclone 200 is connected to a slurry pipe 201, which is used to classify the copper-molybdenum slurry entering from the slurry pipe 201 by hydrocyclone to obtain a first slurry and a second slurry with a particle size larger than the first slurry. The purpose of using the primary hydrocyclone 200 is to classify the copper-molybdenum slurry entering it into a first slurry and a second slurry with a particle size larger than the first slurry by hydrocyclone, and to separate the first slurry with smaller particles, thereby avoiding the formation of slime in the first slurry with smaller particles during the flotation process, which would affect the mineral recovery rate. This ensures and improves the mineral recovery effect.

[0019] The secondary hydrocyclone 300 is used to classify the second slurry entering it by hydrocyclone to obtain a third slurry and a fourth slurry with a particle size larger than the third slurry. The purpose of using the secondary hydrocyclone 300 is to separate the second slurry into a third slurry and a fourth slurry with a particle size larger than the third slurry by hydrocyclone classification, and to separate the larger particles of the fourth slurry. This avoids the situation where the larger particles of the fourth slurry contain unliberated minerals, resulting in low precision of the minerals obtained after flotation, thereby improving the precision of the minerals after flotation.

[0020] The slurry preparation device 400 is equipped with a feed port 401 and a first stirring component 402. The first stirring component 402 mixes the slurry preparation medium entering from the feed port 401 with the third slurry to obtain a fifth slurry of a preset concentration. The slurry preparation medium includes collectors, inhibitors, etc., and the preset concentration of the fifth slurry is beneficial for mineral flotation. Specifically, in the process of flotating molybdenum ore slurry, the applicant sets the preset concentration to 10% to 20% of the copper-molybdenum mineral content in the fifth slurry. The specific value of the preset concentration can be set according to actual conditions, and this application does not specify it here. Furthermore, the first stirring component 402 can refer to existing stirring paddles, and its purpose is to mix the slurry preparation medium and the third slurry entering the slurry preparation device 400. Therefore, this application does not elaborate on it here.

[0021] Flotation device 500 is used to agitate and aerate the fifth slurry entering it to obtain the first target mineral. The flotation device 500, for example, is a KYF-1 flotation machine purchased by the applicant from Shandong Shenhua Machinery Manufacturing Co., Ltd. The first target mineral is the molybdenum ore that the applicant wants to obtain by flotation.

[0022] The mixed flotation system provided in this application uses a primary hydrocyclone 200 to classify the copper-molybdenum ore slurry into a first slurry and a second slurry with a particle size larger than the first slurry. The second slurry then enters a secondary hydrocyclone 300 for further classification to obtain a third slurry and a fourth slurry with a particle size larger than the third slurry. The third slurry then enters a slurry conditioning device 400, where a first stirring component 402 mixes the conditioning medium and the third slurry to obtain a fifth slurry of a preset concentration. Finally, the fifth slurry is agitated and aerated in a flotation device 500 to obtain the first target mineral (for example, the first target mineral can be molybdenum ore). In other words, this application... The first slurry with smaller particles in the copper-molybdenum ore slurry is separated by a primary hydrocyclone 200, and the fourth slurry with larger particles in the copper-molybdenum ore slurry is separated by a secondary hydrocyclone 300. This results in a third slurry with particles larger than the first slurry but smaller than the fourth slurry. This avoids the problem of the first slurry with smaller particles easily generating slime during flotation, which affects the recovery rate of the first target mineral, and the fourth slurry with larger particles containing unliberated minerals, which results in lower precision of the first target mineral obtained after flotation. Then, the third slurry is adjusted to a fifth slurry with a preset concentration by a slurry conditioning device 400. The fifth slurry is easier for the flotation device 500 to flotate and obtain the first target mineral, thereby improving the recovery efficiency of the first target mineral.

[0023] In some embodiments, reference Figure 4 The slurry preparation device 400 in this application is connected to a first air inlet pipe 403, and a first air pump 4031 is installed on the first air inlet pipe 403.

[0024] In the above embodiment, gas (which may be compressed air) is introduced into the slurry preparation device 400 via a first air pump 4031 through the end of a first air supply pipe 403 away from the slurry preparation device 400. This generates an upward airflow within the slurry preparation device 400, disrupting the settling of solid particles in the third slurry and maintaining the third slurry in suspension as much as possible, thus avoiding the risk of blockage in the pipes. Furthermore, introducing gas into the slurry preparation device 400 reduces the viscosity of the third slurry, thereby improving its fluidity and ultimately increasing the flotation efficiency of the first target mineral. Further, to disrupt the settling of solid particles in the third slurry and reduce its viscosity, the first air supply pipe 403 is connected to the side wall of the slurry preparation device 400 near its bottom.

[0025] In some embodiments, reference Figure 4 The flotation device 500 in this application is connected to a second air supply pipe 501, and a second air pump 5011 is installed on the second air supply pipe 501.

[0026] In the above embodiment, gas (which can be air) is introduced into the flotation device 500 through the second air pump 501 at the end of the second air supply pipe 501 away from the flotation device 500. This causes the gas to form microbubbles in the flotation device 500, so that the hydrophobic first target mineral particles adhere to the surface of the bubbles under the action of the reagent, forming "mineralized bubbles" and floating to the surface of the slurry. The hydrophilic gangue minerals sink to the bottom of the tank, thereby accelerating the separation rate of the first target mineral and the hydrophilic gangue minerals, thus improving the flotation efficiency of the first target mineral.

[0027] In some embodiments, reference Figure 6 The flotation device 500 in this application is provided with a second stirring component 502. The second stirring component 502 stirs the slurry and air entering the flotation device 500 so that the hydrophobic first target mineral adheres to the surface of the bubbles under the action of the reagent, forming "mineralized bubbles" and floating to the surface of the slurry, while the hydrophilic gangue minerals sink to the bottom of the tank, thereby accelerating the separation rate of the first target mineral and the hydrophilic gangue minerals, thereby improving the flotation efficiency of the first target mineral.

[0028] Specifically, the second stirring assembly 502 includes a stirring shaft 5021, a stirring wheel 5022, multiple horizontal stirring rods 5023, and a vertical stirring rod 5024. The bottom end of the stirring shaft 5021 extends into the flotation device 500. The stirring wheel 5022 is located at the bottom end of the stirring shaft 5021. The multiple horizontal stirring rods 5023 are evenly spaced from top to bottom on the shaft of the stirring shaft 5021 located within the flotation device 500. The vertical stirring rod 5024 is located at the end of the multiple horizontal stirring rods 5023 away from the stirring shaft 5021. The end of the stirring shaft 5021 located outside the flotation device 500 is driven by a driving device (which can be a motor), and the stirring shaft 5021 is rotatably connected to the flotation device 500 via bearings.

[0029] In the above embodiment, under the action of the driving device, the stirring shaft 5021 drives the stirring wheel 5022 at its bottom, and multiple horizontal stirring rods 5023 and vertical stirring rods 5024 arranged from top to bottom on its shaft located in the flotation device 500 to rotate synchronously with it. This achieves the stirring of the bottom, horizontal direction and vertical direction of the fifth slurry in the flotation device 500 by the stirring wheel 5022, multiple horizontal stirring rods 5023 and vertical stirring rods 5024 respectively. This makes the fifth slurry in the flotation device 500 in a suspended state, which facilitates the first target mineral to adhere to the surface of the bubbles under the action of the reagent, forming "mineralized bubbles" and floating to the surface of the slurry. The hydrophilic gangue minerals sink to the bottom of the tank, thereby accelerating the separation rate of the first target mineral and the hydrophilic gangue minerals, thereby improving the flotation efficiency of the first target mineral.

[0030] In some embodiments, reference Figure 2 and Figure 4 In this application, the overflow pipe of the primary hydrocyclone 200 is connected to a flotation column 600 at the end furthest from itself. The flotation column 600 is used to flotate the first slurry entering it from the overflow pipe of the primary hydrocyclone 200 to obtain a second target mineral (wherein the second target mineral is molybdenum ore with a small particle size). The flotation column 600 is an aerated flotation machine that uses compressed air to aerate and agitate the slurry through a porous medium (aerator). Types include microbubble countercurrent flotation columns and microbubble jet flotation columns, which are suitable for flotating slurries with small particles. The flotation column 600 in this application, for example, is a CCF-1.0×11.0 model purchased by the applicant from Anhui Zhongneng Mining Machinery Manufacturing Co., Ltd.

[0031] In the above embodiments, since the first slurry still contains the first target mineral with smaller particles, in order to ensure the recovery rate of the first target mineral while minimizing its loss, this application uses a flotation column 600 to float the first target mineral with smaller particles in the first slurry to obtain a second target mineral with the same composition as the first target mineral but smaller in particle size, thereby improving the recovery rate of molybdenum ore.

[0032] In some embodiments, reference Figure 4 In this application, the underflow port of the secondary hydrocyclone 300 is connected to the ball mill 700 through the second pipe 102, and the discharge port of the ball mill 700 is connected to the first pipe 101 between the secondary hydrocyclone 300 and the slurry preparation device 400 through the third pipe 103; wherein, the third pipe 103 is equipped with a first metering pump 1031.

[0033] In the above embodiments, since the fourth slurry with larger particles may contain undissociated minerals, resulting in a lower precision of the first target mineral obtained after flotation, this application uses a ball mill 700 to ball mill the fourth slurry that enters sequentially from the underflow port of the secondary hydrocyclone 300 and the second pipe 102 to obtain a slurry with a particle size equal to or close to that of the third slurry. Under the action of the first metering pump 1031, the slurry ball-milled by the ball mill 700 is sequentially transported to the slurry conditioning device 400 through the third pipe 103 and the first pipe 101, thereby avoiding the loss of the fourth slurry with larger particles and thus improving the recovery rate of the first target mineral.

[0034] In some embodiments, reference Figure 2 and Figure 4 A second metering pump 1011 is provided on the first pipeline 101 between the slurry preparation device 400 and the flotation device 500 in this application.

[0035] In the above embodiment, the second metering pump 1011 provides the power to transport the copper-molybdenum slurry sequentially between the primary hydrocyclone 200, the secondary hydrocyclone 300, the slurry conditioning device 400, and the flotation device 500. This ensures the continuity and stability of the copper-molybdenum slurry flotation process and improves the flotation efficiency of the first target mineral. Furthermore, the second metering pump 1011 can also meter the copper-molybdenum slurry entering the slurry pipe 201, facilitating the subsequent calculation of the recovery rate of the first target mineral and thus ensuring the accuracy of the copper-molybdenum slurry flotation process.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hybrid flotation system, characterized in that, include: The first-stage hydrocyclone (200), the second-stage hydrocyclone (300), the slurry preparation device (400), and the flotation device (500) are connected in sequence through the first pipe (101). The feed inlet of the first-stage hydrocyclone (200) is connected to a slurry pipe (201) for hydrocyclone classification of the copper-molybdenum slurry entering from the slurry pipe (201) to obtain a first slurry and a second slurry with a particle size larger than the first slurry. The secondary hydrocyclone (300) is used to perform hydrocyclone classification on the second slurry entering therein to obtain a third slurry and a fourth slurry with a particle size larger than the third slurry; The slurry preparation device (400) is provided with a feed port (401) and a first stirring component (402), which is used to stir and mix the slurry preparation medium entering from the feed port (401) and the third slurry entering from the feed port (401) through the first stirring component (402) to obtain a fifth slurry of a preset concentration. The flotation device (500) is used to agitate and aerate the fifth slurry entering it in order to obtain the first target mineral.

2. The hybrid flotation system according to claim 1, characterized in that, The slurry preparation device (400) is connected to a first air filling pipe (403), and a first air pump (4031) is installed on the first air filling pipe (403).

3. The hybrid flotation system according to claim 1, characterized in that, The flotation device (500) is connected to a second air supply pipe (501), and a second air pump (5011) is installed on the second air supply pipe (501).

4. The hybrid flotation system according to claim 1, characterized in that, The flotation device (500) is equipped with a second stirring assembly (502); The second stirring assembly (502) includes a stirring shaft (5021), a stirring wheel (5022), a plurality of horizontal stirring rods (5023), and a vertical stirring rod (5024); the bottom end of the stirring shaft (5021) extends into the flotation device (500), the stirring wheel (5022) is disposed at the bottom end of the stirring shaft (5021), the plurality of horizontal stirring rods (5023) are disposed at equal intervals from top to bottom on the shaft of the stirring shaft (5021) located in the flotation device (500), and the vertical stirring rod (5024) is disposed at the end of the plurality of horizontal stirring rods (5023) away from the stirring shaft (5021).

5. The hybrid flotation system according to claim 1, characterized in that, The overflow pipe of the primary hydrocyclone (200) is connected to a flotation column (600) at the end away from itself. The flotation column (600) is used to flotate the first slurry entering the primary hydrocyclone (200) from the overflow pipe to obtain the second target mineral.

6. The hybrid flotation system according to claim 1, characterized in that, The underflow port of the secondary hydrocyclone (300) is connected to the ball mill (700) through the second pipe (102), and the discharge port of the ball mill (700) is connected to the first pipe (101) between the secondary hydrocyclone (300) and the slurry preparation device (400) through the third pipe (103). The third pipeline (103) is equipped with a first metering pump (1031).

7. The hybrid flotation system according to any one of claims 1 to 6, characterized in that, A second metering pump (1011) is installed on the first pipeline (101) between the slurry preparation device (400) and the flotation device (500).

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