High-strength mineralization two-stage flotation system and implementation method

Abstract

The invention belongs to the technical field of flotation equipment, particularly relates to a high-strength mineralization two-section flotation system and an implementation method, solves the problem that a collecting area and a concentration area interfere with each other in one device in pulp flotation, and strengthens the separation process of target minerals and gangue minerals in roughing and concentration. The invention discloses a high-strength mineralization two-section flotation equipment system and an implementation method. Two sub-processes of colliding and mineralizing particle bubbles in a flotation process to form a particle bubble combination body and separating the particle bubble combination body from ore pulp are arranged in sections and are completed in mutually independent equipment spaces; the developed high-strength mineralization device achieves the high-strength mineralization process, the developed separation device strengthens the separation process of roughing and concentration, and accurate measurement and control and modular design of the flotation process and the device can be completely achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral flotation equipment, and in particular to a high-intensity mineralized two-stage flotation system applicable to most mineral flotation processes and an implementation method thereof. Background Art

[0002] Mineral resources are important natural resources and an important material basis for the development of social production. People's production and life in modern society are inseparable from mineral resources. Flotation is widely used in the separation of fine-grained metal minerals, non-metallic minerals, chemical raw material minerals, etc. In recent years, my country's mineral processing equipment and technology have developed rapidly, but due to the increasingly low content of useful components in the ores that need flotation treatment, large-scale separation and quality improvement of low-quality ores has become a strategic choice for the high-quality development of the industry. At present, the research and development and promotion of low-quality mineral flotation equipment still face severe challenges, and there is an urgent need to develop new flotation processes and efficient flotation equipment.

[0003] In conventional mechanical agitation flotation machines, mechanical energy is mainly used to prevent coarse particles from settling, generate highly dispersed bubbles, generate fluid turbulence required for particle bubble mineralization, slurry circulation in the stirring area, and force the particle bubble complex to leave the capture area. Increasing the input energy density is conducive to the intensification of the above process, but it will also cause particles to fall off the bubbles during the forced expulsion of the particle bubble complex from the capture area. During the design, the input mechanical agitation energy had to compromise between ensuring the capture of most particles, preventing the fall of coarse particles, and insufficient energy for the capture of fine particles. Therefore, conventional mechanical agitation flotation machines have a good flotation effect on intermediate particle size minerals, but not on the coarse and fine particle ends. For this reason, it is inevitable to design a two-stage flotation machine dedicated to coarse particle flotation and high-intensity mineralization for fine particle flotation as a supplement. Summary of the invention

[0004] The object of the present invention is to provide a two-stage flotation system with high-intensity mineralization to produce concentrate.

[0005] To achieve the above object, the present invention adopts the following contents:

[0006] A two-stage flotation system with high-intensity mineralization includes the following main equipment: a pulp barrel, an air compression device, a high-intensity mineralization device, a roughing separation device, and a fine separation device.

[0007] Further, the high-intensity mineralization device includes a pulp inlet, an air inlet, and a pulp outlet. The rough separation device includes a mineralized pulp inlet, a reverse fluidization water inlet, a concentrate outlet, a middlings recycle outlet, and a tailings outlet. The cleaning separation device includes a rough concentrate inlet, a spray water inlet, a concentrate outlet, a middlings recycle outlet, and a middlings outlet. The pulp tank is connected to the inlet of the slurry pump through a pipeline. The outlet of the slurry pump is connected to the pulp inlet of the high-intensity mineralization device through a pipeline. The outlet of the air compression device is connected to the air inlet of the high-intensity mineralization device through a pipeline. The pulp outlet of the high-intensity mineralization device is connected to the mineralized pulp inlet of the rough separation device through a pipeline. The concentrate outlet of the rough separation device is connected to the rough concentrate inlet of the cleaning separation device through a pipeline.

[0008] Further, the incoming feed pulp is first stirred and mixed evenly in the pulp tank and then enters the high-intensity mineralization device. At the same time, the air compression device presses air into the high-intensity mineralization device. In the high-intensity mineralization device, the high-speed rotating impeller and the stationary baffle cause the pulp and air to mix strongly. The hydrophobic pulp collides with the bubbles and adheres to them to form mineralized bubbles. The mineralized pulp enters the rough separation device. The bubble flow formed after mineralization moves upward, while the unmineralized pulp flows downward. The reverse fluidization water in the rough separation device washes the upward mineralized bubble flow to minimize the entrainment of mineralized bubbles in gangue. When the pulp flow passes through the inclined plate and enters the tailings, the bubbles are effectively blocked. The middlings recycle of the rough separation device returns to the pulp tank to continue the flotation process. The tailings outlet of the rough separation device is the tailings. The rough concentrate of the rough separation device enters the cleaning separation device. The stable mineralized bubble flow moves upward, while the pulp that has lost mineralization flows downward. The spray water in the cleaning separation device washes the upward mineralized bubble flow to further reduce the entrainment of mineralized bubbles in gangue. When the pulp flow passes through the inclined plate and enters the middlings, the bubbles are effectively blocked. The middlings recycle of the cleaning separation device returns to the pulp tank to continue the flotation process. The concentrate outlet of the cleaning separation device is the concentrate, and the middlings outlet is the middlings.

[0009] For the equipment and implementation method of two-stage flotation with high-intensity mineralization described above, the incoming flotation pulp is from the flotation buffer tank of a general ore dressing plant.

[0010] The present invention has the following advantages:

[0011] The two-stage flotation system using high-strength mineralization of the present invention divides the two sub-processes of the particle-bubble collision mineralization in the pulp flotation process to form particle-bubble aggregates and the separation of the particle-bubble aggregates from the pulp into segments and completes them in independent equipment spaces, having the advantages of high impurity removal efficiency, wide adaptability, and high concentrate recovery rate. The system of the present invention has been tested, and the sorting behavior of the pulp is regulated by changing the flow field parameters to achieve rapid flotation and high-precision control of the pulp, which will have important economic and social significance for the efficient utilization of mineral resources. BRIEF DESCRIPTION OF THE DRAWINGS:

[0012] Figure 1 It is a schematic process flow diagram of the system of the present invention;

[0013] Figure 2 is Figure 1 a schematic structural diagram of the medium- and high-strength mineralization device;

[0014] Figure 3 is Figure 1 a schematic structural diagram of the rough separation device;

[0015] Figure 4 is Figure 1 a schematic structural diagram of the cleaning separation device;

[0016] In the figure, 1 - pulp tank, 2 - slurry pump, 3 - medium- and high-strength mineralization device, 4 - air compression device, 5 - rough separation device, 6 - cleaning separation device, 7 - feed inlet, 8 - air inlet, 9 - air inlet, 10 - discharge outlet, 11 - mineralized pulp inlet, 12 - reverse fluidization water inlet, 13 - rough concentrate outlet, 14 - middlings recycle outlet, 15 - tailings outlet, 16 - rough concentrate inlet, 17 - spray water inlet, 18 - concentrate outlet, 19 - middlings recycle outlet, 20 - middlings outlet. DETAILED DESCRIPTION OF THE INVENTION

[0017] Refer to Figures 1 to 4To further elaborate on the present invention, an apparatus and method for two-stage flotation with high-strength mineralization includes a pulp tank 1, a slurry pump 2, a high-strength mineralization device 3, an air compression device 4, a rough separation device 5, and a cleaning separation device 6; the high-strength mineralization device 3 includes a pulp inlet 7, an air inlet 8 / 9, and a pulp outlet 10; the rough separation device 5 includes a mineralized pulp inlet 11, a reverse fluidization water inlet 12, a rough concentrate outlet 13, a middling recycle outlet 14, a tailing outlet 15, and the cleaning separation device 6 includes a rough concentrate inlet 16, a spray water inlet 17, a concentrate outlet 18, a middling recycle outlet 19, and a middling outlet 20. The pulp tank 1 is connected to the inlet of the slurry pump 2 through a pipeline, the outlet of the slurry pump 2 is connected to the pulp inlet 7 of the high-strength mineralization device 3 through a pipeline, the outlet of the air compression device 4 is connected to the air inlet 8 / 9 of the high-strength mineralization device 3 through a pipeline, the pulp outlet 10 of the high-strength mineralization device 3 is connected to the mineralized pulp inlet 11 of the rough separation device 5 through a pipeline, the middling of the rough separation device 5 returns to the pulp tank 1, and the rough concentrate outlet 13 of the rough separation device 5 is connected to the rough concentrate inlet 16 of the cleaning separation device 6 through a pipeline, and the middling of the cleaning separation device 6 returns to the pulp tank 1.

[0018] The feed pulp first enters the high-strength mineralization device 3 after being stirred and mixed evenly in the pulp tank 1. At the same time, the air compression device 4 presses air into the high-strength mineralization device 3. In the high-strength mineralization device 3, the high-speed rotating impeller and the stationary baffle cause the pulp and air to be strongly mixed, and the hydrophobic pulp collides with the bubbles and adheres together to form mineralized bubbles; the mineralized pulp enters the rough separation device 5. The bubble flow formed after mineralization moves upward, while the unmineralized pulp moves downward. The reverse fluidization water 12 of the rough separation device 5 washes the upward mineralized bubble flow to minimize the entrainment of mineralized bubbles by gangue. When the pulp flow passes through the inclined plate and enters the tailings, the bubbles are effectively blocked. The middling of the rough separation device 5 returns to the pulp tank 1 to continue the cyclic flotation. The tailing outlet of the rough separation device 5 is the tailings. The rough concentrate of the rough separation device 5 enters the cleaning separation device 6. The stable mineralized bubble flow moves upward, while the pulp that has lost mineralization moves downward. The spray water 17 of the cleaning separation device 6 washes the upward mineralized bubble flow to further reduce the entrainment of mineralized bubbles by gangue. When the pulp flow passes through the inclined plate and enters the tailings, the bubbles are effectively blocked. The middling of the cleaning separation device 6 returns to the pulp tank 1 to continue the cyclic flotation. The concentrate outlet of the cleaning separation device 6 is the concentrate, and the middling outlet is the middling.

[0019] The above has introduced in detail a two-stage flotation system with high-strength mineralization and its implementation method provided by the embodiments of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

[0020] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in functions of components as the criterion for distinction. As mentioned throughout the specification and claims, the terms "comprising" and "including" are open-ended terms, so they should be interpreted as "comprising / including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect. The subsequent description in the specification is the preferred implementation manner for implementing the present application, but the description is for the purpose of explaining the general principle of the present application and is not used to limit the scope of the present application. The protection scope of the present application shall be subject to what is defined by the appended claims.

[0021] It should also be noted that the term "including" or "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent in such commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the said element.

[0022] It should be understood that the term "and / or" used herein is only a relational term describing the associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0023] The above description shows and describes several preferred embodiments of the present application. However, as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the application concept described herein through the above teachings or the technology or knowledge in the relevant field. And any changes and variations made by those skilled in the art that do not depart from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.

Claims

1. A two-stage flotation equipment system with high-strength mineralization, characterized in that: it includes a pulp tank, a slurry pump, a high-strength mineralization device, an air compression device, a rough separation device and a fine separation device; wherein, the high-strength mineralization device includes a feed inlet, an air inlet and a pulp outlet; the rough separation device includes a mineralized pulp inlet, a reverse fluidization water inlet, a rough concentrate outlet, a middling recycle outlet and a tailing outlet; the fine separation device includes a rough concentrate inlet, a spray water inlet, a concentrate outlet, a middling recycle outlet and a middling outlet; the pulp tank is connected to the inlet of the slurry pump through a pipeline, the outlet of the slurry pump is connected to the feed inlet of the high-strength mineralization device through a pipeline, the outlet of the air compression device is connected to the air inlet of the high-strength mineralization device through a pipeline, the pulp outlet of the high-strength mineralization device is connected to the mineralized pulp inlet of the rough separation device through a pipeline, the reverse fluidization water inlet of the rough separation device is connected by tap water, and the middling recycle of the rough separation device returns to the pulp tank; the rough concentrate outlet of the rough separation device is connected to the rough concentrate inlet of the fine separation device, the spray water inlet of the fine separation device is connected by tap water, the middling recycle of the fine separation device returns to the pulp tank, the concentrate outlet of the fine separation device is the concentrate product, and the middling outlet is the middling product.

2. The equipment system of two-stage flotation with high-strength mineralization according to claim 1, characterized in that, the number of impellers of the high-strength mineralization device is 3, the distance between the impellers is 75%-85% of the diameter, and the inclination angle of the lower trapezoidal plate of the rough separation device and the fine separation device is 65°-75°.

3. A method for realizing a two-stage flotation system with high-strength mineralization, characterized in that: the incoming feed pulp is first stirred and mixed evenly in the pulp tank and then enters the high-strength mineralization device. At the same time, the air compression device presses air into the high-strength mineralization device. The high-speed rotating impeller and the stationary baffle in the high-strength mineralization device cause the pulp and air to be strongly mixed, and the hydrophobic pulp collides with the bubbles and adheres together to form mineralized bubbles; the mineralized pulp enters the first-stage separation device. The formed bubble flow moves upward, while the unmineralized pulp moves downward. The reverse fluidization water of the rough separation device washes the upward mineralized bubble flow to minimize the entrainment of mineralized bubbles by gangue. When the pulp flow passes through the inclined plate and enters the tailings, the bubbles are effectively blocked; the middling recycle of the rough separation device returns to the pulp tank to continue the flotation. The concentrate of the rough separation device is used as the feed of the fine separation device. The firm mineralized bubble flow moves upward, while the pulp that loses mineralization moves downward. The spray water of the fine separation device washes the upward mineralized bubble flow to further reduce the entrainment of mineralized bubbles by gangue. When the pulp flow passes through the inclined plate and enters the tailings, the bubbles are effectively blocked. The concentrate outlet of the fine separation device is the concentrate, and the middling outlet is the middling.

4. The method for realizing two-stage flotation with high-strength mineralization according to claim 3, characterized in that, the feed pressure range of the high-strength mineralization device is 0.05-0.09 MPa, and the air inlet pressure range is 0.01-0.02 MPa.

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