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A pretreatment device for dispersing fine-grained materials


source:[Gravimetric blender]   release time:2021-05-12 10:13:36




A pretreatment device for dispersing fine-grained materials includes an outer cylinder and an inner circulation cylinder. The inner circulation cylinder is installed in the outer cylinder. The lower part of the outer cylinder is provided with a slurry inlet, and the upper part of the outer cylinder is provided with a slurry outlet. The emulsifying agent adding port, the outer cylinder is equipped with multiple ultrasonic generators, the lower part of the inner circulation cylinder is equipped with multiple circulation holes for the slurry, and the inner circulation cylinder is equipped with a circulating shear mixer. The circulating shear mixer includes a motor, a stirring shaft and Axial shearing blade, the upper end of the mixing shaft is fixedly connected with the output shaft of the motor, the axial shearing blade is installed on the mixing shaft, the axial shearing blade is located in the inner circulation cylinder, and the mixing shaft is rotatably installed on the inner circulation cylinder. The utility model makes the particles receive the dispersion of mechanical force, the cavitation of the ultrasonic compound field and the emulsification of the emulsifying agent in the system. The particles can quickly form a uniform dispersion system after being subjected to the coupling action of the three aspects, which consumes energy and agents. Consumption has been greatly reduced.

Dispersing pretreatment device for fine-grained materials
Technical field
[0001] This utility model belongs to the technical field of slurry pretreatment, and specifically relates to a fine-grained material dispersion pretreatment device.
【Background technique】
[0002] Studies have found that fine-grained materials (with a size of 200 to 600 mesh) are transitional particles of microscopic particles and macroscopic objects, and have special optical, electrical, and magnetic properties. Due to the small particle size, large specific surface area, and surface polymerization energy of fine-grained materials are in an extremely unstable state, they have a tendency to attract each other and reduce the surface energy of the particles, causing the particles to agglomerate and affect their application effects. Especially in the mineral processing industry, the agglomeration of fine-grained materials will eventually affect important indicators such as concentrate grade and concentrate recovery rate, and it will also have a significant impact on the early grinding section operations. Fine-grained materials with poor dispersibility even completely lose their original important characteristics in actual use, which will eventually affect product quality. The dispersion of fine-grained materials will be considered in the production and application process.
[0003] Facts have proved that the dispersion process of particles will be affected by two major types of basic effects, that is, the role of particles and environmental media (system); the interaction between particles and particles. The electrostatic force and van der Waals force between particles, due to the weak force, can be eliminated by some chemical action or the application of mechanical energy. The necessary condition for the use of mechanical force to break up the particle clusters is that the mechanical force should be greater than the fixation force between the particles. . The effective volume of most dispersing machinery is only 1% to 10% of the total volume, and the efficiency of energy transmission to the agglomerate generated by the machinery is only 1%. The energy waste is serious, and the energy used for dispersion is very small. At the same time, the mechanical dispersion has a certain reversibility, once the mechanical force disappears, the fine particles will stick together again. In addition, the high-strength mechanical force can easily cause the dispersion machine to produce abrasion and weaken the effect of the mechanical force.
[0004] Chemical dispersion can increase the electrostatic repulsion on the particle surface through the action of the agent, form an adsorption layer to increase the steric hindrance, and improve the hydration film structure of the particle interface so that the particles are dispersed in the system. However, pure chemical dispersion has strict requirements on the dosage of the medicament, and part of the dispersing medicament will affect the technological properties of the subsequent processing of the particles.
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[0005] Since the particle size of the fine particle material is much larger than the particle size of the dispersant in the colloidal dispersion, the fine particles will form "soft agglomeration" during the dispersion process and increase the difficulty of particle dispersion. The size effect of fine particles also affects the dispersion behavior of the particles in the suspension. So far, there are still few reports on effective dispersion pretreatment devices used in the dispersion of fine-grained materials in the mineral processing industry.
[Utility model content]
[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings in the prior art, to provide a fine particle material dispersion pretreatment device, which uses mechanical force, ultrasonic composite field and emulsifying agent, so that the particles in the system are subjected to mechanical force The dispersion, the cavitation of the ultrasonic compound field and the emulsification of the emulsifying agent, the particles can quickly form a uniform dispersion system after being subjected to the coupling effect of the three aspects, and the energy consumption and the consumption of the agent are greatly reduced.
[0007] In order to achieve the above purpose, the technical solution adopted by the present utility model is: a fine material dispersion pretreatment device, characterized in that it comprises an outer cylinder and an inner circulation cylinder, the inner circulation cylinder is installed in the outer cylinder, The lower part of the outer cylinder is provided with a pulp inlet, the upper part of the outer cylinder is provided with a pulp outlet, the pulp inlet is provided with an emulsifying agent inlet communicating with it, and a plurality of ultrasonic waves are installed on the outer cylinder. A generator, the middle and lower part of the inner circulation cylinder is provided with a plurality of pulp circulation holes, the inner circulation cylinder is equipped with a circulating shear mixer, and the circulating shear mixer includes a motor, a stirring shaft and an axial shear blade, The upper end of the mixing shaft is fixedly connected with the output shaft of the motor, the axial shearing blade is installed on the mixing shaft, the number of the axial shearing blades is multiple, and the two adjacent axial shearing blades A distance is left between the blades, the axial shear blade is located in the inner circulation cylinder, and the stirring shaft is rotatably mounted on the inner circulation cylinder.
[0008] The above-mentioned fine-grained material dispersion pretreatment device is characterized in that: the outer cylinder is provided with a concentration sensor for monitoring the concentration of the slurry.
[0009] The above-mentioned fine-grained material dispersion pretreatment device is characterized in that: the number of ultrasonic generators is four, of which two ultrasonic generators are located on the left side of the outer cylinder, and the other two are located on the left side of the outer cylinder. The ultrasonic generator is located on the right side of the outer cylinder, and the ultrasonic generator on the left side is opposite to the ultrasonic generator on the right side.
[0010] The above-mentioned fine-grained material dispersion pretreatment device is characterized in that: the inner circulation cylinder is installed in the outer cylinder through a mounting rod, one end of the mounting rod is fixedly connected to the inner wall of the outer cylinder, and the mounting The other end of the rod is fixedly connected with the outer wall of the upper end of the inner circulation cylinder.
[0011] The above-mentioned pretreatment device for dispersing fine-grained materials is characterized in that: the middle and lower part of the inner circulation cylinder is a truncated cone-shaped structure.
[0012] The above-mentioned pretreatment device for dispersing fine-grained materials is characterized in that: the angle between the side surface and the bottom surface of the truncated cone-shaped structure is 30°-40°.
[0013] The aforementioned fine-grained material dispersion pretreatment device is characterized in that: the angle between the outer connecting line of the plurality of axial shear blades and the bottom surface of the inner circulation cylinder is 30°-40°.
[0014] The above-mentioned pretreatment device for dispersing fine-grained materials is characterized in that: the shape of the slurry circulation hole is circular, and the diameter of the ore circulation hole is 15mm~25mm.
[0015] The above-mentioned pretreatment device for dispersing fine-grained materials is characterized in that: a plurality of said slurry circulation holes are evenly arranged in the middle and lower parts of the inner circulation cylinder.
[0016] Compared with the prior art, the utility model has the following advantages:
[0017] 1. The present utility model uses compound force field and emulsification for organic coupling, which speeds up the particle dispersion process. Compared with a single mechanical agitation dispersion method, the coupling of multiple effects will reduce the energy consumption of the dispersion process and reduce even Eliminate the possibility of "soft agglomeration" due to adhesion between particles.
[0018] 2. The present utility model adopts emulsifying agent to adsorb on the surface of particles to form an emulsified film, which increases steric hindrance and facilitates particle dispersion.
[0019] 3. The present utility model reduces energy consumption through reasonable flow field control. The microwave field cooperates with the cyclic shear flow field to achieve high-efficiency emulsification and adhesion physical and chemical effects.
[0020] 4. The dispersing pretreatment device of the present utility model is used for dispersing pretreatment of the ore slurry, the discharge particle size is uniform, the particle size distribution is narrow, the dominant particle size is small, and the large-size agglomerated particles are significantly reduced.
[0021] 5. This utility model is suitable for dispersing "lean, fine, and miscellaneous" minerals before flotation, and is also suitable for dispersing pretreatment processes in chemical, paper, environmental, and pharmaceutical industries.
[0022] In summary, the present invention uses the synergy of mechanical force and ultrasonic field to overcome the van der Waals force between fine-grained materials, reduces the viscous force generated by the liquefied film in the medium system, and at the same time assists with the emulsifying agent The effect makes the surface of fine-grained materials adhere to a layer of hydrophobic emulsified film, which increases the energy of particles colliding with each other, and eliminates the possibility of "soft agglomeration" between particles, and the device can quickly process a large number of easily agglomerated particles, with high dispersion efficiency and operation Simple, economical and practical.
[0023] The following describes the utility model in further detail through the drawings and embodiments.
【Explanation of the drawings】
[0024] FIG. 1 is a schematic diagram of the structure of the utility model.
[0025] Description of reference signs:
[0026] I an outer cylinder; 2—internal circulation cylinder; 2-1—mine circulation hole;
[0027] 3—Axial shear blades; 4—Pulp inlet; 5—ultrasonic generator;
[0028] 6—Mine pulp outlet; 7—Emulsification agent adding port; 8—Motor;
[0029] 9—Stirring shaft; 1—Mounting rod; 11—Concentration sensor.
【Detailed ways】
[0030] As shown in FIG. 1, the present invention includes an outer cylinder 1 and an inner circulation cylinder 2. The inner circulation cylinder 2 is installed in the outer cylinder 1, and the lower part of the outer cylinder 1 is provided with a slurry inlet 4, The upper part of the outer cylinder I is provided with a slurry outlet 6, the slurry inlet 4 is provided with an emulsifying agent adding port 7 connected to it, and a plurality of ultrasonic generators 5 are installed on the outer cylinder 1, and the inner A plurality of slurry circulation holes 2-1 are provided in the middle and lower part of the circulation drum 2, and a circulation shear mixer is installed on the inner circulation drum 2. The circulation shear mixer includes a motor 8, a stirring shaft 9 and an axial shear blade 3. The upper end of the mixing shaft 9 is fixedly connected to the output shaft of the motor 8, the axial shearing blade 3 is installed on the mixing shaft 9, and the number of the axial shearing blade 3 is multiple, two adjacent to each other. A distance is left between the two axial shearing blades 3, the axial shearing blades 3 are located in the inner circulation drum 2, and the stirring shaft 9 is rotatably mounted on the inner circulation drum 2.
[0031] As shown in FIG. 1, the outer cylinder 1 is provided with a concentration sensor 11 for monitoring the slurry concentration, and the energy density of the ultrasonic generator 5 is adjusted by the slurry concentration monitored by the concentration sensor 11.
[0032] As shown in FIG. 1, the number of the ultrasonic generators 5 is four, two of the ultrasonic generators are located on the left side of the outer cylinder 1, and the other two ultrasonic generators are located on the outer cylinder. The ultrasonic generator on the right side of I, and the ultrasonic generator on the left is arranged opposite to the ultrasonic generator on the right; the energy density of the ultrasonic generator 5 can be adjusted.
[0033] As shown in FIG. 1, the inner circulation cylinder 2 is installed in the outer cylinder 1 through a mounting rod 10. One end of the mounting rod 10 is fixedly connected to the inner wall of the outer cylinder 1, and the other of the mounting rod 10 is One end is fixedly connected with the outer wall of the upper end of the inner circulation cylinder 2.
[0034] As shown in FIG. 1, the middle and lower part of the inner circulation cylinder 2 is a truncated cone-shaped structure.
[0035] In this embodiment, the angle between the side surface and the bottom surface of the truncated cone-shaped structure is 30°-40°.
[0036] In this embodiment, the angle between the outer connecting line of the plurality of axial shearing blades 3 and the bottom surface of the inner circulation cylinder 2 is 30°-40°.
[0037] As shown in FIG. 1, the shape of the slurry circulation hole 2-1 is circular, and the diameter of the slurry circulation hole 2-1 is 15mm-25mm.
[0038] In this embodiment, a plurality of the pulp circulation holes 2-1 are evenly arranged in the middle and lower parts of the inner circulation cylinder 2.
[0039] The working principle of the present utility model is: the emulsifying agent is added through the emulsifying agent adding port 7, the pulp enters the outer cylinder 1 from the pulp inlet 4, and then the pulp enters the inner circulation cylinder 2 through the pulp circulation hole 2-1, outside Circulating stirring is realized between the cylinder body I and the inner circulation cylinder 2, and the slurry after the dispersion pretreatment flows out from the slurry outlet 6. In the utility model, the cyclic shearing mixer with higher shear strength is used to pre-process the ore pulp by cyclic shearing, so that the easily agglomerated particles gradually reduce the volume of the particle micelles during the stirring process, and the entire dispersion process smoothly extends in terms of strength. , To avoid the secondary crushing of materials caused by excessive crushing strength. At the same time, the addition of emulsifier makes the liquid film between the particles thinner and the liquid bridging binding force becomes smaller, and the steric hindrance between the particles is increased by adsorbing a layer of emulsified film between the particles, and the van der Waals force between the particles is sharply reduced. The ultrasonic field generated by the ultrasonic generator 5, especially the addition of intermediate frequency ultrasonic waves, and the mechanical force field form a composite force field, which can effectively reduce the probability of particles re-occurring "soft agglomeration". At the same time, the coupling effect of the composite force field and the medicament also makes the whole The energy consumption of the dispersion process is reduced, and the time consumption is shortened.
[0040] The above are only preferred embodiments of the present utility model, and do not impose any limitation on the present utility model. Any simple modification, alteration and equivalent structural transformation of the above embodiments made according to the technical essence of the present utility model, All of them still fall within the protection scope of the technical solution of the present invention.
【Sovereignty Item】
1. A pretreatment device for dispersing fine-grained materials, characterized in that it comprises an outer cylinder (I) and an inner circulation cylinder (2), the inner circulation cylinder (2) is installed in the outer cylinder (I), and The lower part of the outer cylinder (I) is provided with a pulp inlet (4), the upper part of the outer cylinder (I) is provided with a pulp outlet (6), and the pulp inlet (4) is provided with an emulsifying agent in communication with it. (7), the outer cylinder (I) is equipped with a plurality of ultrasonic generators (5), the middle and lower part of the inner circulation cylinder (2) is provided with a plurality of slurry circulation holes (2-1), so A circulating shear mixer is installed on the inner circulation cylinder (2), and the circulating shear mixer includes a motor (8), a stirring shaft (9) and an axial shear blade (3). The upper end is fixedly connected with the output shaft of the motor (8), the axial shear blades (3) are installed on the stirring shaft (9), and the number of the axial shear blades (3) is multiple, two adjacent to each other. A distance is left between the two axial shearing blades (3), the axial shearing blades (3) are located in the inner circulation drum (2), and the stirring shaft (9) is rotatably installed in the inner circulation drum ( 2) On. 2. A fine-grained material dispersion pretreatment device according to claim 1, characterized in that: the outer cylinder (I) is provided with a concentration sensor (11) for monitoring the concentration of the slurry. 3. A fine-grained material dispersion pretreatment device according to claim 1 or 2, characterized in that: the number of said ultrasonic generators (5) is four, and two of said ultrasonic generators are located in the outer cylinder. On the left side of the body (I), the other two ultrasonic generators are located on the right side of the outer cylinder (I), and the ultrasonic generator on the left side is opposite to the ultrasonic generator on the right side. 4. A fine-grained material dispersion pretreatment device according to claim 1 or 2, characterized in that: the inner circulation cylinder (2) is installed in the outer cylinder (I) through a mounting rod (10), and the One end of the mounting rod (10) is fixedly connected with the inner wall of the outer cylinder body (1), and the other end of the mounting rod (10) is fixedly connected with the upper end outer wall of the inner circulation cylinder (2). 5. A fine-grained material dispersion pretreatment device according to claim 1 or 2, characterized in that: the middle and lower part of the inner circulation cylinder (2) has a truncated cone-shaped structure. 6. A fine-grained material dispersion pretreatment device according to claim 5, characterized in that: the angle between the side surface and the bottom surface of the truncated cone-shaped structure is 30°-40°. 7. A fine-grained material dispersion pretreatment device according to claim 6, characterized in that: between the outer connecting line of the plurality of axial shear blades (3) and the bottom surface of the inner circulation cylinder (2) The included angle is 30°~40°. 8. A fine-grained material dispersion pretreatment device according to claim 1 or 2, characterized in that: the shape of the slurry circulation hole (2-1) is circular, and the slurry circulation hole (2-1) The diameter of) is 15mm~25mm. 9. A fine-grained material dispersion pretreatment device according to claim 1 or 2, characterized in that: a plurality of the slurry circulation holes (2-1) are evenly arranged in the middle and lower parts of the inner circulation cylinder (2). 
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