Fine-grain mineral reinforced mixing size mixing equipment and fine-grain mineral reinforced mixing size mixing method

Abstract

The invention relates to a fine-grain mineral reinforced mixing and size mixing device and method, belongs to the technical field of mineral flotation stirring and size mixing, and solves the problem that the stirring and size mixing device in the prior art cannot meet the requirements of high dispersion and collision between fine-grain minerals and flotation reagents due to the single structural design. The device comprises a barrel body, a chemical adding mechanism and a wheel-paddle coupling pulp mixing mechanism, the chemical adding mechanism is arranged on the outer side of the barrel body, the wheel-paddle coupling pulp mixing mechanism is used for intensively mixing and mixing pulp in the barrel body, and an inner cavity of the barrel body is divided into a feeding distribution area, an opposite impact area and a shearing impact area from bottom to top. Based on horizontal shearing turbulent flow collision at the bottom of the barrel body and vertical shearing turbulent flow collision at the top of the barrel body, vortex shearing of ore pulp and an agent fed into the barrel wall in a top impeller area and secondary convection collision reinforcement between impeller propelling paddle areas are achieved, dispersion, collision and adhesion of fine-grain minerals and the agent are enhanced, the pulp mixing time is shortened, and the pulp mixing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral flotation stirring and slurry mixing, and in particular to a fine-grained mineral enhanced mixing and slurry mixing device and method. Background Art

[0002] Flotation is the most economical and efficient interface separation technology for coal and mineral resources, and has a significant impact on the large-scale recovery and utilization of fine-grained low-grade coal and valuable mineral resources. The general flotation process is based on the difference in the surface properties of minerals. Particles with strong hydrophobicity on the surface are easy to adhere to bubbles and float up to become concentrate products, while the more hydrophilic gangue mineral particles are retained in the slurry and discharged as tailings products. With large-scale mechanized mining, the reserves of high-quality coal and ore are decreasing, and the mineral separation methods such as crushing and grinding for low-quality coal slime release clean coal while also increasing the content of fine-grained coal slime. Therefore, optimizing and adapting fine-grained flotation equipment, simplifying the flotation process, and improving the efficiency of the sorting process are effective measures to achieve the current efficient sorting of fine-grained coal slime.

[0003] Slurry adjustment is a key step in the flotation process. Its core goal is to reduce the amount of fine mud on the surface of mineral particles, enhance the dispersibility, collision and adhesion of mineral particles and flotation agents, and expand the surface property differences between different mineral particles, thereby promoting efficient separation. Efficient slurry adjustment is a prerequisite for the effective flotation of fine and micro-fine minerals. Due to their low density and high specific surface area, micro-fine minerals are easy to adhere to the target mineral particles during the flotation process, which will weaken the interaction between the target mineral and the flotation agent and affect its surface properties. Traditional stirring slurry adjustment equipment and methods are mainly based on a single structure design, which often cannot meet the technical requirements of high dispersion and collision between micro-fine minerals and flotation agents. Therefore, there is an urgent need to develop a strong mixing and shearing equipment suitable for the flotation of fine-grained minerals. Summary of the invention

[0004] In view of the above analysis, the embodiments of the present invention aim to provide a fine-grained mineral enhanced mixing and slurrying equipment and method, so as to solve the problem that the existing stirring and slurrying equipment cannot meet the high dispersion and collision between fine-grained minerals and flotation agents due to the single structural design.

[0005] On the one hand, the present invention provides a fine-grained mineral enhanced mixing and slurry adjustment device, including a barrel body, a dosing mechanism and a wheel-paddle coupling slurry adjustment mechanism, the dosing mechanism is arranged on the outside of the barrel body, the wheel-paddle coupling slurry adjustment mechanism is used for enhanced mixing and slurry adjustment of the slurry in the barrel body, and the inner cavity of the barrel body is divided from bottom to top into a feed distribution area, an opposed impact area and a shear collision area.

[0006] Furthermore, it also includes a feeding mechanism, which includes a feeding distributor. The barrel body includes a cylindrical barrel and an inverted conical barrel arranged below the cylindrical barrel, and the feeding distributor is arranged in the inverted conical barrel.

[0007] Furthermore, the feeding mechanism also includes a slurry jet pipe, one end of which is a slurry feed port, and the other end of which enters from the bottom of the inverted cone barrel and is connected to the feed distributor.

[0008] Furthermore, the barrel body also includes a partitioning hole plate, which is arranged at the connection between the cylindrical barrel and the inverted conical barrel, and the partitioning hole plate is used to separate the inner cavity of the cylindrical barrel and the inner cavity of the inverted conical barrel.

[0009] Furthermore, the barrel body also includes a baffle, which is arranged in the cylindrical barrel. There are multiple baffles, and the multiple baffles are evenly distributed along the circumference of the inner wall of the cylindrical barrel.

[0010] Furthermore, the feeding mechanism also includes a first centrifugal pump and a first flow meter arranged on the slurry jet pipe.

[0011] Furthermore, the cylindrical barrel is provided with a slurry discharge port and a slurry extraction port, the slurry discharge port is connected to the slurry discharge pipe, and the slurry extraction port is connected to the slurry extraction pipe.

[0012] Furthermore, the slurry extraction pipe is communicated with the slurry injection pipe.

[0013] Furthermore, the wheel-propeller coupling pitch adjustment mechanism includes an impeller pitch adjustment component and a propulsion pitch adjustment component, the impeller pitch adjustment component is connected to the upper part of the cylindrical barrel, and the propulsion pitch adjustment component is connected to the lower part of the cylindrical barrel.

[0014] On the other hand, the present invention provides an enhanced mixing and slurrying method, which uses the above-mentioned enhanced mixing and slurrying equipment to perform enhanced mixing and slurrying on fine-grained minerals.

[0015] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0016] (1) The present invention is a two-stage coupled enhanced stirring structure of top vertical shearing and bottom opposing impact, wherein one stage of the feed distribution structure is based on a spoke-type distributor to achieve initial uniform and rapid dispersion of the slurry feed and the emulsifier in the stirring barrel. The first collision slurry adjustment structure of the second stage adopts horizontal submerged propulsion blades placed opposite to each other on four sides, realizing the close coordination of propulsion blade counter-flow impact and adjacent shear flow collision, strengthening the suspension dispersion, collision and adhesion of fine-grained mineral particles and emulsified reagents in the slurry after entering the mixing barrel, and at the same time promoting the stripping of high-ash fine mud covering the mineral surface, effectively inhibiting the influence of mudification on the selectivity of reagents, and realizing effective contact between slurry and reagents; the second collision slurry adjustment structure of the third stage is based on the horizontal bottom of the barrel and the vertical top shear turbulent collision, realizing the vortex shear of the slurry and the reagent fed into the barrel wall in the top impeller area and the secondary convection collision enhancement between the impeller and propulsion blade area, further enhancing the dispersion, collision and adhesion of fine-grained minerals and reagents, shortening the slurry adjustment time, and improving the slurry adjustment efficiency, providing a basis for the deep quality improvement and efficient utilization of low-quality coal slime flotation.

[0017] (2) After being distributed by the reagent distribution controller, the reagent of the present invention enters the diversion array dosing tube and the slurry jet tube respectively, which can adapt to the changes in slurry properties and flow field caused by different stirring impellers and propulsion blade speeds, structures and feeding properties, and realize the reasonable distribution of reagent dosage in the spatial area, avoiding the problem of increasing reagent consumption due to poor slurry adjustment effect, enhancing the full dispersion of mineral particles and reagents and the interaction such as collision and adhesion, reducing reagent consumption, reducing slurry adjustment costs, and realizing cost reduction and efficiency improvement in the slurry adjustment stage from the perspective of reagents. The reagent diversion feeding of the barrel bottom jet-barrel wall surround coupling reduces the energy consumption of the stirring process while meeting the functional needs of different areas in the slurry adjustment process, and improves the reagent dispersion efficiency.

[0018] (3) The impeller slurry adjustment component of the present invention includes a vertical stirring impeller, and the propulsion slurry adjustment component includes horizontal four-sided opposed propulsion blades. The vertical axial stirring impeller is combined with the horizontal opposed propulsion blades to achieve flexible regulation of the flow field distribution in space, reduce the adverse effect of the circumferential movement of fine-grained minerals on the peeling of fine mud, and further enhance the dispersion, collision and adhesion between fine-grained minerals and reagents; the stirring impeller and the propulsion blades are connected to the electrically controlled telescopic rod, and the spatial position of the stirring impeller and the propulsion blades can be adjusted by adjusting the electrically controlled telescopic rod. At the same time, the paddle speeds of each part can be adjusted to coordinately optimize the flow field turbulence distribution to adapt to the current feed slurry properties and on-site production needs, which helps to improve the flexibility and accuracy of the system and avoid the influence of the unreasonable flow field environment on the actual production caused by the non-uniform dispersion of the feed slurry and the reagent in space.

[0019] (4) The structured partition design of the present invention improves the energy utilization rate of the stirring process and is more suitable for the discontinuous changes in the material properties during the actual generation process. The feed distribution structure area ensures the orderly and uniform rise and dispersion of the feed and the emulsifier at the bottom of the stirring barrel, which is the initial stage for processing low-quality fine-grained mineral particles that are difficult to adjust; the primary collision slurry adjustment structure area realizes the initial and rapid suspension dispersion, collision and adhesion of the uniformly fed fine-grained mineral feed and the emulsifier in space, which is the core stage for processing low-quality fine-grained mineral particles that are difficult to adjust; the secondary collision slurry adjustment structure area realizes the binary collision strengthening of the initial slurry with the barrel wall ring-shaped feed agent in the radial and axial directions during the rising process, shortening the slurry adjustment and slurry transportation time, which is the final stage for processing low-quality fine-grained mineral particles that are difficult to adjust. At the same time, the structural design also facilitates the replacement and maintenance of key components inside the equipment, thereby increasing the service life of the equipment.

[0020] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.

[0022] Figure 1 It is a structural schematic diagram of a fine-grained mineral enhanced mixing and slurry mixing device according to a specific embodiment;

[0023] Figure 2 It is a schematic diagram of the connection structure between the flow dividing array dosing tube and the barrel body in a specific embodiment;

[0024] Figure 3 It is a schematic diagram of the connection structure of the partition plate, the inverted cone and the slurry jet pipe in a specific embodiment;

[0025] Reference numerals:

[0026] 100-barrel body; 101-cylindrical barrel; 102-inverted cone barrel; 103-barrel cover; 104-clean water supply pipe; 105-slurry discharge port; 106-slurry extraction port; 107-accident discharge port; 108-slurry discharge pipe; 109-slurry extraction pipe; 110-separation orifice plate; 111-feeding hole; 112-distribution channel; 113-baffle; 114-bracket; 115-feeding distribution area; 116-opposing impact area; 117-shearing collision area;

[0027] 200-dosing mechanism; 201-dividing array dosing pipe; 202-dosing pipe diverter; 203-dosing main pipe; 204-first dosing branch pipe; 205-second dosing branch pipe; 206-agent distribution controller; 207-collector dosing port; 208-foaming agent dosing port; 209-dividing dosing pipe; 210-second centrifugal pump; 211-second flow meter;

[0028] 300-wheel-paddle coupling slurry adjustment mechanism; 301-impeller slurry adjustment assembly; 302-propulsion slurry adjustment assembly; 303-first motor; 304-first belt transmission mechanism; 305-first electrically controlled telescopic rod; 306-stirring shaft; 307-stirring impeller; 308-first controller; 309-second motor; 310-second belt transmission mechanism; 311-second electrically controlled telescopic rod; 312-propulsion blade; 313-second controller;

[0029] 400 - feeding mechanism; 401 - feeding distributor; 402 - ore slurry jet pipe; 403 - ore slurry feeding port; 404 - first centrifugal pump; 405 - first flow meter. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0031] Example 1

[0032] A specific embodiment of the present invention, as Figure 1 As shown, a fine-grained mineral enhanced mixing and slurry adjustment device is disclosed, including a barrel body 100, a dosing mechanism 200 and a propeller-coupled slurry adjustment mechanism 300. The dosing mechanism 200 is arranged on the outside of the barrel body 100 and is used for adding drugs into the barrel body 100. The propeller-coupled slurry adjustment mechanism 300 is used for enhanced mixing and slurry adjustment of the slurry in the barrel body 100.

[0033] like Figure 1 As shown, the barrel body 100 includes a cylindrical barrel 101, an inverted conical barrel 102 and a barrel cover 103. The cylindrical barrel 101 is arranged above the inverted conical barrel 102. Exemplarily, the cylindrical barrel 101 and the inverted conical barrel 102 are welded. Preferably, the cylindrical barrel 101 and the inverted conical barrel 102 are arranged concentrically. The height ratio of the cylindrical barrel 101 to the inverted conical barrel 102 is generally 4:1 to 6:1, preferably 5:1. The barrel cover 103 is arranged on the top of the cylindrical barrel 101.

[0034] In order to inject clean water into the cylindrical barrel 101, Figure 1As shown, the barrel body 100 further includes a clean water supply pipe 104, one end of which is located above the barrel cover 103, and the other end passes through the barrel cover 103 and is located in the cylindrical barrel 101. In order to control the on-off of the clean water supply pipe 104, a first solenoid valve is provided on the clean water supply pipe 104.

[0035] Considering the discharge and circulation of slurry, Figure 1 As shown, the cylindrical barrel 101 is also provided with a slurry discharge port 105, a slurry extraction port 106 and an emergency discharge port 107. The emergency discharge port 107 is arranged at the bottom of the cylindrical barrel 101, at the junction of the cylindrical barrel 101 and the inverted cone barrel 102. The slurry discharge port 105 and the slurry extraction port 106 are both arranged at the upper part of the cylindrical barrel 101. Preferably, the slurry discharge port 105 and the slurry extraction port 106 are located at the same height. Figure 1 and Figure 2 As shown, the slurry discharge port 105 is connected to the slurry discharge pipe 108, and the slurry extraction port 106 is connected to the slurry extraction pipe 109. The prepared slurry is discharged from the slurry discharge port 105, and the slurry extracted from the slurry extraction port 106 enters the cylindrical barrel 101 again for circulation, stirring and slurry adjustment. It can be understood that the slurry discharge port 105, the slurry extraction port 106 and the accident discharge port 107 are distributed with a second solenoid valve, a third solenoid valve and a fourth solenoid valve to control the opening and closing of the corresponding openings.

[0036] In order to distribute the slurry into the cylindrical barrel 101, as Figure 1 As shown, the enhanced mixing and slurry mixing equipment also includes a feed mechanism 400, which includes a feed distributor 401 and a slurry jet pipe 402. The feed distributor 401 is arranged in the inverted cone barrel 102, and one end of the slurry jet pipe 402 is a slurry feed port 403, and the other end enters from the bottom of the inverted cone barrel 102 and is connected to the feed distributor 401. The slurry enters the slurry jet pipe 402 from the slurry feed port 403 and then is evenly dispersed into the cylindrical barrel 101 through the feed distributor 401. The slurry extraction pipe 109 is connected to the slurry jet pipe 402, and the slurry extracted from the cylindrical barrel 101 enters the slurry jet pipe 402 through the slurry extraction pipe 109, and circulates into the cylindrical barrel 101 through the feed distributor 401. It is understandable that a fifth solenoid valve is provided at the slurry inlet 403 and a sixth solenoid valve is provided on the slurry jet pipe 402 to control the opening and closing of the slurry inlet 403 and the slurry jet pipe 402 .

[0037] In order to monitor the flow rate of slurry and provide jet power for slurry, such as Figure 1 As shown, the feeding mechanism 400 further includes a first centrifugal pump 404 and a first flow meter 405 , which are both disposed on the slurry jet pipe 402 and located downstream of the connection between the slurry extraction pipe 109 and the slurry jet pipe 402 .

[0038] like Figure 1 and Figure 3 As shown, a partition plate 110 is provided at the junction of the cylindrical barrel 101 and the inverted cone barrel 102. The partition plate 110 is horizontally arranged at the bottom of the cylindrical barrel 101 to separate the inner cavity of the cylindrical barrel 101 from the inner cavity of the inverted cone barrel 102. The partition plate 110 is provided with spoke-shaped feed holes 111, the number of spokes is generally 6 to 12, preferably 8, and the number of feed holes 111 on each strip is generally 6 to 12, preferably 8. The feed distributor 401 is connected to the feed holes 111 through the distribution channel 112, and the distribution channel 112 corresponds to the feed holes 111 one by one. In this embodiment, the slurry is evenly distributed into the cylindrical barrel 101 through the feed distributor 401, the radial distribution channel 112, and the feed holes 111.

[0039] In order to enhance the shear force on the slurry, Figure 1 As shown, the barrel body 100 further includes a baffle 113 , which is disposed in the cylindrical barrel 101 . A plurality of baffles 113 are provided, and the plurality of baffles 113 are evenly distributed along the circumference of the inner wall of the cylindrical barrel 101 . Preferably, four baffles 113 are provided.

[0040] like Figure 1 As shown, the dosing mechanism 200 includes a flow-dividing array dosing pipe 201, a dosing pipe flow divider 202, a dosing main pipe 203, a first dosing branch pipe 204, a second dosing branch pipe 205 and a medicine distribution controller 206. One end of the dosing main pipe 203 is connected to the medicine distribution controller 206, and one end of the dosing main pipe 203 is provided with a collector dosing port 207 and a frother dosing port 208. One end of the first dosing branch pipe 204 is connected to the medicine distribution controller 206, and the other end is connected to the dosing pipe flow divider 202. One end of the second dosing branch pipe 205 is connected to the medicine distribution controller 206, and the other end is connected to the slurry jet pipe 402. The flow-dividing array dosing pipe 201 is connected to the dosing pipe flow divider 202. It can be understood that the dosing main pipe 203 and the second dosing branch pipe 205 are respectively provided with a seventh solenoid valve and an eighth solenoid valve.

[0041] like Figure 1 As shown, the shunt array dosing tube 201 includes a plurality of shunt dosing tubes 209, one end of which is connected to the dosing tube shunt 202, and the other end is connected to the inner cavity of the cylindrical barrel 101, and the connection position between the shunt dosing tube 209 and the cylindrical barrel 101 is evenly distributed along the circumference of the cylindrical barrel 101. The number of shunt dosing tubes 209 is generally 4-12, preferably 8. In order to control the drug feeding of each shunt dosing tube 209, a ninth solenoid valve is provided on each shunt dosing tube 209.

[0042] To monitor the dosage, Figure 1As shown, the dosing mechanism 200 further includes a second centrifugal pump 210 and a second flow meter 211 , and the second centrifugal pump 210 and the second flow meter 211 are both arranged on the first dosing branch pipe 204 .

[0043] like Figure 1 As shown, the wheel-paddle coupling slurry adjustment mechanism 300 includes an impeller slurry adjustment component 301 and a propulsion slurry adjustment component 302. The impeller slurry adjustment component 301 is connected to the upper part of the cylindrical barrel 101, and the propulsion slurry adjustment component 302 is connected to the lower part of the cylindrical barrel 101. There are multiple propulsion slurry adjustment components 302, and the multiple propulsion slurry adjustment components 302 are arranged along the circumferential side wall of the cylindrical barrel 101. Preferably, there are four propulsion slurry adjustment components 302, and the four propulsion slurry adjustment components 302 are arranged opposite to each other. By arranging the impeller slurry adjustment component 301 at the top of the cylindrical barrel 101 and the propulsion slurry adjustment component 302 at the bottom of the cylindrical barrel 101, a top vertical shear and bottom opposing impact two-stage coupling enhanced stirring structure is formed to meet the functional needs of the slurry adjustment process.

[0044] like Figure 1 As shown, the impeller slurry adjustment assembly 301 includes a first motor 303, a first belt transmission mechanism 304, a first electrically controlled telescopic rod 305 and a stirring shaft 306. The first motor 303 is arranged on the barrel cover 103. The upper end of the first electrically controlled telescopic rod 305 is connected to the first motor 303 through the first belt transmission mechanism 304. The lower end of the first electrically controlled telescopic rod 305 passes through the barrel cover 103 and is connected to the upper end of the stirring shaft 306. The lower end of the stirring shaft 306 is provided with a stirring impeller 307. The number of stirring impellers 307 is generally 2-6 more than the number of baffles 113, preferably 4; the stirring impeller 307 is generally a straight blade type, a folding blade type or a spiral blade type, preferably a straight blade type. The lower end of the first electrically controlled telescopic rod 305 can be extended and retracted, thereby driving the stirring shaft 306 and the stirring impeller 307 to move up and down. It is understandable that the impeller pitch adjustment assembly 301 further includes a first controller 308 , and the first controller 308 is used to control the extension and retraction of the first electrically-controlled telescopic rod 305 .

[0045] like Figure 1 As shown, the propulsion slurry adjustment assembly 302 includes a second motor 309, a second belt transmission mechanism 310, a second electrically-controlled telescopic rod 311, a propulsion blade 312 and a second controller 313. The second motor 309 is arranged on a bracket 114, and the bracket 114 is connected to the cylindrical barrel 101. One end of the second electrically-controlled telescopic rod 311 is connected through the second belt transmission mechanism 310, and the other end passes through the barrel wall of the cylindrical barrel 101 and is connected to the propulsion blade 312 arranged in the cylindrical barrel 101. The second motor 309 drives the second electrically-controlled telescopic rod 311 to rotate, thereby driving the propulsion blade 312 to rotate. The second controller 313 controls the extension and retraction of the second electrically-controlled telescopic rod 311, thereby driving the propulsion blade 312 away from or close to the axis of the cylindrical barrel 101.

[0046] In this embodiment, the vertical distance between the lower edge of the stirring impeller 307 and the upper edge of the propulsion blade 312 is 1-5 cm, preferably 3 cm, and the spacing between the opposing propulsion blades 312 is generally 10-30 cm, preferably 20 cm. On the one hand, they cooperate to construct a flow field environment of opposing impact-shear collision coupling, and on the other hand, they make full use of the space of the barrel body 100 to reduce stirring power consumption and achieve cost reduction and efficiency improvement.

[0047] It is worth noting that the connection point between the split flow dosing pipe 209 and the cylindrical barrel 101 is located between the lower edge of the stirring impeller 307 and the upper edge of the propulsion blade 312, so that the reagent entering from the split flow array dosing pipe 201 directly collides and shears with the slurry.

[0048] In this embodiment, the first collision slurry adjustment adopts the horizontal submerged propulsion blades 312 arranged in opposite directions to achieve the close coordination of the propulsion blades 312 counter-flow collision and the adjacent shear flow collision, which strengthens the suspension dispersion, collision and adhesion of fine-grained mineral particles and emulsified agents in the slurry after entering the cylindrical barrel 101, and at the same time promotes the stripping of high-ash fine mud covering the mineral surface, effectively suppresses the influence of mudification on the selectivity of the agent, and realizes the effective contact between the slurry and the agent; the second collision slurry adjustment is based on the horizontal shear turbulent collision at the bottom of the cylindrical barrel 101 and the vertical shear turbulent collision at the top, which realizes the vortex shear of the slurry and the agent fed into the barrel wall in the top impeller area and the secondary convection collision enhancement between the stirring impeller 307 and the propulsion blade 312 area, further enhancing the dispersion, collision and adhesion of fine-grained minerals and agents, shortening the slurry adjustment time, and improving the slurry adjustment efficiency, providing a basis for the deep quality improvement and efficient utilization of low-quality coal slime flotation.

[0049] like Figure 1 As shown, the inner cavity of the barrel body 100 is divided into a feed distribution area 115, an opposed impact area 116 and a shear collision area 117 from bottom to top. The feed distribution area 115 corresponds to the inner cavity of the inverted cone barrel 102, and a spoke-type feeding structure consisting of a feed distributor 401, a partition plate 110 and a distribution channel 112 is arranged inside the feed distribution area 115. The spoke-type feeding structure is combined with the jet emulsification circulation dosing to achieve uniform feeding and rapid dispersion of the slurry, which is helpful for the initial dispersion of mineral particles and reagents in the slurry.

[0050] like Figure 1 As shown, the opposing impact zone 116 is provided with two opposing propulsion blades 312, and the propulsion blades 312 are arranged transversely (i.e. horizontally). Through the close coordination of convection impact between the opposing propulsion blades 312 and shear collision between adjacent propulsion blades 312, the effective mixing of the slurry after the initial stage and the dispersion between the mineral particles and the reagent in the slurry are promoted, the adverse effect of the circumferential movement of fine-grained minerals on the stripping of fine mud is reduced, and the dispersion, collision and adhesion of the target mineral and the reagent are further enhanced.

[0051] like Figure 1 As shown, a stirring shaft 306 and a stirring impeller 307 are provided in the shear collision zone 117, which are combined with the shear flow collision intensification on the upper part of the propulsion blade 312 through the electrically adjustable vertical impeller (the first electrically controlled telescopic rod 305 adjusts the stirring impeller 307 to move up and down), and the diversion array dosing pipe 201 of the annular array type on the outer periphery of the cylindrical barrel 101 is cooperated to realize the remixing and shear collision of fine-grained mineral particles and reagents in the preliminary slurry, and fully realize the interaction between the target mineral and the reagent such as dispersion, collision and adhesion, which is helpful to shorten the slurrying time and reduce power consumption, and provide a basis for the deep quality improvement and efficient utilization of low-quality mineral resources.

[0052] This embodiment is different from the traditional stirring and slurry mixing device with a single structural design. It realizes the adaptive input of energy in the slurry mixing process through structured partition design, enhances the energy utilization efficiency of the slurry mixing process, reduces power consumption, improves the material adaptability and product stability of the equipment, and avoids the influence of non-uniform changes in material properties on actual production. It is particularly suitable for stirring and slurry mixing before flotation of low-quality fine-grained minerals with high ash and fine mud content.

[0053] Example 2

[0054] Another specific embodiment of the present invention discloses an enhanced mixing and slurrying method, which uses the enhanced mixing and slurrying equipment of Example 1 to perform enhanced mixing and slurrying on fine-grained minerals, including the following steps:

[0055] Step 1: Start the stirring impeller 307 and propel the paddle blade 312 to rotate.

[0056] Specifically, before the stirring and slurry mixing begins, the emergency discharge port 107, the slurry discharge pipe 108, and the slurry jet pipe 402 are pre-closed by the solenoid valve, and then the first motor 303 and the second motor 309 are started to drive the stirring impeller 307 and the propulsion blade 312 on the electric telescopic rod to rotate through the belt transmission mechanism.

[0057] Step 2: Add slurry and reagents into the cylindrical barrel 101.

[0058] After the stirring barrel runs stably, the slurry discharge pipe 108 and the slurry jet pipe 402 are opened in sequence through the solenoid valve, and the dosing pipe diverter 202 is opened after the dosing amount ratio of the jet emulsification dosing and the diverting array dosing pipe 201 is adjusted through the dosing controller 206. The dosing pipe diverter 202 is fed into the dosing pipe diverter 202 through the first dosing branch pipe 204, and then enters the cylindrical barrel 101 through the diverting dosing pipe 209, and the second dosing branch pipe 205 is fed into the slurry jet pipe 402 and enters the cylindrical barrel 101. The slurry is fed into the slurry jet pipe 402 from the slurry inlet 403, and then evenly fed into the cylindrical barrel 101 from the array distribution channel 112 and the feed hole 111 through the feed distributor 401.

[0059] After the slurry enters the bottom of the cylindrical barrel 101 uniformly and longitudinally through the partition plate 110, the particles and the reagent are initially dispersed, and the opposite impact and adjacent shear collision are formed under the action of the rotating horizontal submerged propulsion blade 312. When the slurry passes through the connection between the second dosing branch pipe 205 and the slurry jet pipe 402 (where a venturi tube structure is formed), negative pressure is formed, and the collector and the foaming agent in the second dosing branch pipe 205 are self-absorbed into the slurry under the action of pressure, and enter the barrel from the feed hole 111 through the feed distributor 401 in the inverted cone barrel 102, and then suspended and dispersed.

[0060] The collector is selected from kerosene, diesel, pine oil, preferably diesel; the dosage is 0.5-4kg / t, preferably 0.5kg / t; the foaming agent is selected from sec-octanol, methyl isobutyl carbinol, methyl amyl alcohol, dodecyl trimethyl ammonium bromide, preferably sec-octanol; the dosage is 0.2-2kg / t, preferably 0.2kg / t.

[0061] In this embodiment, a first-stage feed distribution structure adopts a spoke-type feed and jet emulsification-ring array dosing coordinated structural design, which improves the suspension dispersion, collision and adhesion of mineral particles and reagents in the slurry, is beneficial to the stripping of high-ash fine mud adhered to the surface of the target mineral, avoids the influence of mudification on the selectivity of the reagent, and realizes full contact between the slurry and the reagent. It is a basic link in processing low-quality fine-grained mineral particles that are difficult to slurry.

[0062] Step 3: One-time impact reinforcement.

[0063] The ore pulp and reagent enter the opposing impact zone 116, and the propulsion blade 312 with a straight blade design cooperates with the second controller 313 and the second electrically controlled telescopic rod 311 to control the strong shearing effect of the opposing shear impact and surrounding shear collision on the passing ore pulp. The ore pulp in the opposing impact zone 116 is stirred by the propulsion blade 312 to form a preliminarily mixed and slurried slurry. At the same time, the vertical baffle 113 at the barrel wall of the cylindrical barrel 101 also hinders the rotating ore pulp, which helps to increase the turbulence of the ore pulp. The ore pulp after enhanced shear slurrying enters the secondary shear collision zone 117 through the push of the propulsion blade 312.

[0064] The combined design of the four opposed propulsion blades 312 in the primary opposed impact zone 116, in cooperation with the second controller 313 and the second electrically-controlled telescopic rod 311, realizes the radial and axial binary shear strengthening of the slurry in the bottom space of the cylindrical barrel 101, reduces the adverse effect of the circumferential flow of fine-grained minerals on the peeling of fine mud, further enhances the dispersion, collision and adhesion between mineral particles and reagents, and is a key link in processing low-quality fine-grained mineral particles that are difficult to slurry.

[0065] Step 4: Secondary shear collision strengthening.

[0066] The slurry entering the shear collision zone 117 is driven by the vertical stirring impeller 307 to achieve secondary shear collision intensification of the initially slurry, thereby achieving rapid processing of the initially slurry, shortening the slurrying time, and helping to prevent the adverse effects of excessive slurrying on subsequent flotation. It is the final link in processing low-quality fine-grained mineral particles that are difficult to slurry.

[0067] It is worth noting that, according to the nature of the feed material and the needs of on-site production, the shearing effect of the slurry can also be regulated by changing the number of vertical baffles 113 and regulating the first electric telescopic rod 305 and the second electric telescopic rod 311. When the properties of the mineral particles are complex and the fine mud content is large (difficult to float), the number of vertical baffles 113 should be increased, the horizontal gap between the stirring impeller 307 and the propulsion blade 312, and the distance between the opposite and adjacent propulsion blades 312 should be shortened to enhance the shearing and slurry adjustment effect; when the properties of the mineral particles are uniform and the fine mud content is small (easy to float), the number of vertical baffles 113 can be reduced, and the horizontal gap between the stirring impeller 307 and the propulsion blade 312, the distance between the relative propulsion blades 312 and the distance between the adjacent propulsion blades 312 can be appropriately increased to increase the slurry throughput and increase the equipment processing capacity.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A fine-grained mineral enhanced mixing and slurry mixing equipment, characterized in that: The invention comprises a barrel (100), a dosing mechanism (200) and a wheel-paddle coupling slurry adjustment mechanism (300), wherein the dosing mechanism (200) is arranged on the outside of the barrel (100), and the wheel-paddle coupling slurry adjustment mechanism (300) is used for enhanced mixing and slurry adjustment of the ore slurry in the barrel (100). The inner cavity of the barrel (100) is divided from bottom to top into a feed distribution area (115), an opposed impact area (116) and a shear collision area (117).

2. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 1 is characterized in that: It also includes a feed mechanism (400), the feed mechanism (400) includes a feed distributor (401), the barrel body (100) includes a cylindrical barrel (101) and an inverted conical barrel (102) arranged below the cylindrical barrel (101), and the feed distributor (401) is arranged in the inverted conical barrel (102).

3. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 2 is characterized in that: The feeding mechanism (400) further comprises a slurry jet pipe (402), one end of which is a slurry feed port (403), and the other end of which enters from the bottom of the inverted cone barrel (102) and is connected to the feeding distributor (401).

4. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 2 is characterized in that: The barrel body (100) further comprises a partitioning hole plate (110), wherein the partitioning hole plate (110) is arranged at the connection between the cylindrical barrel (101) and the inverted conical barrel (102), and the partitioning hole plate (110) is used to separate the inner cavities of the cylindrical barrel (101) and the inverted conical barrel (102).

5. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 2, characterized in that: The barrel body (100) further comprises a baffle (113), wherein the baffle (113) is arranged in the cylindrical barrel (101), and a plurality of baffles (113) are provided, and the plurality of baffles (113) are evenly distributed along the circumference of the inner wall of the cylindrical barrel (101).

6. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 3 is characterized in that: The feeding mechanism (400) further comprises a first centrifugal pump (404) and a first flow meter (405) which are arranged on the slurry jet pipe (402).

7. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 6, characterized in that: The cylindrical barrel (101) is provided with a slurry discharge port (105) and a slurry extraction port (106), wherein the slurry discharge port (105) is connected to a slurry discharge pipe (108), and the slurry extraction port (106) is connected to a slurry extraction pipe (109).

8. The fine-grained mineral enhanced mixing and slurry mixing equipment according to claim 7 is characterized in that: The slurry extraction pipe (109) is in communication with the slurry injection pipe (402).

9. The fine-grained mineral enhanced mixing and slurry mixing equipment according to any one of claims 2 to 8, characterized in that: The wheel-propeller coupling pitch adjustment mechanism (300) comprises an impeller pitch adjustment component (301) and a propulsion pitch adjustment component (302); the impeller pitch adjustment component (301) is connected to the upper part of the cylindrical barrel (101), and the propulsion pitch adjustment component (302) is connected to the lower part of the cylindrical barrel (101).

10. A method for strengthening mixing and slurry preparation, characterized in that: The slurry mixing equipment described in any one of claims 1 to 9 is used to carry out intensive mixing and slurry mixing of fine-grained minerals.

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