A stirring and mixing device for slurry raw material flotation operation and use method thereof

Abstract

The invention relates to the technical field of ore pulp raw material flotation, and discloses a stirring and mixing device for ore pulp raw material flotation operation, comprising a stirring barrel, a raw material crushing mechanism for crushing the ore pulp raw material is installed on the barrel cover, and a stirring mechanism for mixing the ore pulp raw material and a flotation agent, and an air charging mechanism for flotation ore pulp raw material particles are arranged inside the stirring barrel; the invention reduces the manual transportation of raw material crushed materials into the stirring barrel, saves time and labor, and in the process of crushing the ore pulp raw material, particles that do not meet the particle size requirements can be screened and crushed twice, so as to ensure that the ore pulp raw material particles entering the stirring barrel are fully mixed with the flotation agent, generate more bubbles, and the bubble floats for a long distance, which is conducive to the bubbles adhering to the mineral particles to form mineral bubbles, and improves the flotation effect of the ore pulp raw material particles, and the air flow regulating component added to the air transmission pipe can realize the adjustment of the air flow through simple operation, so as to facilitate the control of the speed of bubble generation.

Description

Technical Field

[0001] The invention relates to the technical field of ore pulp raw material flotation, and in particular to a stirring and mixing device for ore pulp raw material flotation operation and a use method thereof. Background Art

[0002] Slurry raw material flotation is an important part of the ore dressing process, mainly used to separate useful minerals from useless minerals in the ore. Flotation is a technology based on the difference in buoyancy of ore minerals in water. By injecting air or bubbles into the stirring tank, useful mineral particles attach to the bubbles and float up, while useless minerals sink to the bottom.

[0003] After searching, the patent with application number CN200910243351.4 discloses a bauxite flotation method, which is characterized in that the foam product after grinding and roughing enters the pulp tank, the mineralized foam after enrichment floats on the pulp, and overflows from the overflow port of the pulp tank to become concentrate I; the pulp after inclusion and defoaming flows downward, the bottom flow pulp enters the selected flotation tank through the slurry pump, and the selected foam product is used as concentrate II; the selected bottom flow returns to the roughing operation, the roughing bottom flow enters the scavenging, the scavenging foam returns to the roughing operation, and the scavenging bottom flow is used as tailings; concentrate I and concentrate II are combined into the final concentrate. The method of this invention effectively solves the problem of foam transmission, stabilizes the ore pressure of the pulp feed, stabilizes the flotation process, reduces the water consumption of the flotation system, increases the flotation concentration, reduces the flotation time of qualified concentrate, increases the equipment capacity, improves the mineral processing index, reduces the production cost, and provides bauxite concentrate raw materials of qualified grade for the Bayer process to produce alumina.

[0004] The current slurry raw material flotation operation needs to break the slurry raw material into small particles before stirring, so that bubbles can drive the mineral particles to float up during subsequent aeration flotation. However, in the prior art, the slurry raw material needs to be broken in advance and then transported to the stirring device, which requires manual handling, which is time-consuming and laborious. In addition, not all the raw material particles broken in advance meet the particle size requirements, which affects the uniform mixing of the slurry raw material and the flotation agent during the stirring process. Moreover, the current aeration device used for flotation is not convenient for adjusting the gas flow according to the real-time flotation state. Therefore, we need to propose a stirring and mixing device for slurry raw material flotation operation and a method for using it. Summary of the invention

[0005] The object of the present invention is to provide a stirring and mixing device for slurry raw material flotation operation and a method for using the device, which can directly pour the slurry raw material into the raw material crushing mechanism for crushing before stirring, and it is unnecessary to crush the slurry raw material in advance, thereby reducing the manual transportation of raw material crushed materials into the stirring barrel, saving time and labor, and in the process of crushing the slurry raw material, the particles that do not meet the particle size requirements can be screened and crushed for the second time, so as to ensure that the slurry raw material particles entering the stirring barrel are fully mixed with the flotation reagent, and it is also convenient for the bubbles generated during the subsequent flotation to easily drive the mineral particles to float up; the airflow is transported to the annular air supply pipe at the bottom of the stirring barrel, not only more bubbles are generated, but also the distance for the bubbles to float up is long, which is conducive to the bubbles adhering to the mineral particles to form mineral bubbles, thereby improving the flotation effect of the slurry raw material particles, and the air flow regulating component added to the air supply pipe can realize the adjustment of the air flow through simple operation, which is convenient for controlling the speed of bubble generation, and the air flow can be adjusted according to the real-time flotation status to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a stirring and mixing device for slurry raw material flotation operation, comprising a stirring barrel, a barrel cover is installed on the stirring barrel, a raw material crushing mechanism for crushing the slurry raw material is installed on the barrel cover, a stirring mechanism for mixing the slurry raw material and the flotation reagent, and an aeration mechanism for flotation slurry raw material particles are arranged inside the stirring barrel;

[0007] The raw material crushing mechanism comprises a casing fixed on the barrel cover and connected to the mixing barrel, a pair of first crushing rollers and a pair of second crushing rollers for crushing the slurry raw materials are rotatably installed inside the casing, a screening assembly for screening large-particle slurry raw materials is arranged below the second crushing rollers, a discharge port aligned with the screening assembly is arranged at the lower end of one side of the casing, and a raw material recovery box aligned with the discharge port is arranged on the barrel cover;

[0008] The stirring mechanism comprises a plurality of stirring racks rotatably mounted inside the stirring barrel, the stirring racks are connected to auxiliary stirring rods mounted vertically, and a plurality of stirring blades are rotatably mounted on the stirring racks and the auxiliary stirring rods.

[0009] Preferably, a feed port is provided at the top of the casing, a feed hopper is installed inside the feed port, the feed hopper is configured to be a feed hopper with a funnel-shaped cross section, and the feed hopper is located above the first crushing roller.

[0010] Preferably, the first crushing roller and a pair of second crushing rollers are staggered, and an inclined plate and a baffle located between the first crushing roller and the pair of second crushing rollers are connected to the two opposite inner walls inside the casing, one end of the inclined plate is located above one of the second crushing rollers, and one end of the baffle is located above the other second crushing roller.

[0011] Preferably, the screening material assembly is arranged at an angle, and the screening material assembly includes two groups of side positioning plates fixed on the inner wall of the casing, and the two groups of side positioning plates are provided with clearance grooves on opposite sides, and a screen for screening slurry raw material particles is movably arranged between the two groups of clearance grooves.

[0012] Preferably, a driving component for driving the screen to move back and forth laterally is installed on the outer side of the casing, and the driving component includes a bracket, on which a first motor is installed, one end of the output shaft of the first motor is connected to a resistance block, and the side of the resistance block away from the first motor is set as a wavy curved surface.

[0013] Preferably, a connecting rod is connected to one side of the screen, one end of which passes through one set of side positioning plates and the casing to abut against an abutment block, and a spring is connected between one side of the screen and a yield groove on one set of side positioning plates.

[0014] Preferably, a second motor is installed on the barrel cover, one end of the output shaft of the second motor is connected to a rotating shaft, and the multiple groups of stirring racks are connected to the outer wall of the rotating shaft.

[0015] Preferably, the inflation mechanism includes an air pump installed on the barrel cover and an air supply pipe installed at the bottom of the mixing barrel, an air delivery pipe is connected between the air pump and the air supply pipe, a plurality of air holes for generating bubbles are opened on the outer wall of the air delivery pipe, and an air flow regulating component is arranged on the top of the air delivery pipe.

[0016] Preferably, the air flow regulating assembly includes a cover plate fixed on the top of the air delivery pipe, a knob is rotatably provided on the cover plate, a rotating column is connected to the lower end of the knob, a sphere is connected to the lower end of the rotating column, and a connected air inlet and air outlet are respectively provided on the sphere.

[0017] Based on the above-described stirring and mixing device for slurry raw material flotation operation, the present invention also provides a method for using the stirring and mixing device for slurry raw material flotation operation, comprising the following steps:

[0018] S1. Crushing of slurry raw materials: driving the first crushing roller and the second crushing roller to rotate, and running the first motor to pour the slurry raw materials from the feed hopper into the interior of the casing. The first crushing roller and the second crushing roller crush the slurry raw materials twice, and the raw material particles fall on the screening component. The first motor drives the screen to move back and forth, and the raw material particles that meet the particle size requirements fall into the mixing barrel, and the raw material particles that do not meet the particle size requirements fall from the discharge port into the raw material recovery box;

[0019] S2, raw material stirring: add flotation reagent into the stirring barrel, run the second motor, drive the stirring frame and the auxiliary stirring rod to rotate through the rotating shaft, and the stirring blade also rotates under the impact of the water flow to fully mix the flotation reagent and the slurry raw material particles;

[0020] S3. Aeration flotation: After the stirring is completed, the air pump is operated to transport the air flow to the inside of the air supply pipe through the air supply pipe. The generated bubbles overflow from the pores, and the bubbles attach to the useful mineral particles to form mineral bubbles, and float upward to realize the flotation of the slurry raw materials.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The design of the raw material crushing mechanism installed on the stirring barrel of the present invention can directly pour the slurry raw material into the raw material crushing mechanism for crushing before stirring, so that the slurry raw material does not need to be crushed in advance, and the manual transportation of raw material crushed materials into the stirring barrel is reduced, which saves time and labor. In the process of crushing the slurry raw material, particles that do not meet the particle size requirements can be screened and crushed for the second time, so as to ensure that the slurry raw material particles entering the stirring barrel are fully mixed with the flotation reagent, and it is also convenient for the bubbles generated during the subsequent flotation to easily drive the ore particles to float;

[0023] 2. The present invention not only adds an auxiliary stirring rod on the basis of the original stirring frame through the design of the stirring mechanism, but also rotatably installs a plurality of staggered stirring blades on the outer walls of the stirring frame and the auxiliary stirring rod, thereby ensuring sufficient and rapid mixing of the slurry raw material particles and the flotation reagent;

[0024] 3. The present invention conveys the airflow to the annular air supply pipe at the bottom of the mixing barrel through the design of the inflation mechanism, which not only generates more bubbles, but also has a long floating distance for the bubbles, which is conducive to the bubbles attaching to the mineral particles to form mineral bubbles, thereby improving the flotation effect of the slurry raw material particles. In addition, the air flow regulating component added to the air supply pipe can adjust the air flow through simple operations, which is convenient for controlling the speed of bubble generation and can adjust the air flow according to the real-time flotation conditions.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the raw material crushing mechanism of the present invention;

[0029] Figure 3 It is a cross-sectional view of the raw material crushing mechanism of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the screening material assembly of the present invention;

[0031] Figure 5 An exploded view of the screening material assembly of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the stirring mechanism of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the inflation mechanism of the present invention;

[0034] Figure 8 It is a structural schematic diagram of the gas flow regulating assembly of the present invention;

[0035] Fig. 9 The figure is a flow chart of the flotation operation of slurry raw materials of the present invention.

[0036] In the figure: 1, mixing barrel; 2, barrel cover; 3, raw material crushing mechanism; 31, casing; 32, feed port; 33, discharge port; 34, raw material recovery box; 35, feed hopper; 36, first crushing roller; 37, inclined plate; 38, baffle; 39, second crushing roller; 310, screening assembly; 311, side positioning plate; 312, clearance groove; 313, screen; 314, driving assembly; 3141, bracket; 3142, first motor; 3143, resistance block; 3144, 44. Connecting rod; 3145. Spring; 4. Stirring mechanism; 41. Second motor; 42. Rotating shaft; 43. Stirring frame; 44. Auxiliary stirring rod; 45. Stirring blade; 46. Through hole; 5. Inflating mechanism; 51. Air pump; 52. Air pipe; 53. Air flow regulating assembly; 531. Cover plate; 532. Knob; 533. Rotating column; 534. Sphere; 535. Air inlet; 536. Air outlet; 54. Air pipe; 55. Air hole; 6. Feeding port. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-9The present invention provides a technical solution: a stirring and mixing device for slurry raw material flotation operation, comprising a stirring barrel 1, the stirring barrel 1 is used to contain slurry raw materials and flotation reagents, a barrel cover 2 is installed on the stirring barrel 1, a raw material crushing mechanism 3 for crushing the slurry raw materials is installed on the barrel cover 2, the raw material crushing mechanism 3 can perform secondary crushing of the slurry raw materials, a stirring mechanism 4 for mixing the slurry raw materials and the flotation reagent, and an aeration mechanism 5 for flotation slurry raw material particles are arranged inside the stirring barrel 1; when the stirring mechanism 4 stirs the slurry raw materials and the flotation reagents, the ore particles can be suspended.

[0039] The basic principle of flotation is to use the affinity between bubbles and mineral particles to attach bubbles to useful mineral particles to form bubbles. The bubbles have a smaller density than the surrounding water, so they can float on the water surface. At the same time, by adjusting other parameters such as stirring speed, bubble size and pulp concentration, the size and buoyancy of the bubbles can be controlled, thereby effectively floating useful minerals.

[0040] The barrel cover 2 is also provided with a feeding port 6 connected to the inside of the mixing barrel 1 for adding flotation reagents. By adding specific flotation reagents, the wettability and physical and chemical properties of the mineral surface can be changed, thereby improving the flotation effect.

[0041] The raw material crushing mechanism 3 includes a casing 31 fixed on the barrel cover 2 and connected to the mixing barrel 1. The bottom end of the casing 31 is located at the upper end of the mixing barrel 1, and the bottom end of the casing 31 is funnel-shaped. A pair of first crushing rollers 36 and a pair of second crushing rollers 39 for crushing slurry raw materials are rotatably installed inside the casing 31. The first crushing roller 36 is located above the second crushing roller 39. The gap between the pair of first crushing rollers 36 is larger than the gap between the pair of second crushing rollers 39, that is, the particle size of the raw material particles after the second crushing roller 39 is smaller. A screening component 310 for screening large-particle slurry raw materials is arranged below the second crushing roller 39. Generally, the size of the slurry raw material particles after two crushings does not exceed 0.2 mm. The slurry raw material particles with a size exceeding 0.2 mm are intercepted by the screening component 310. A discharge port 33 aligned with the screening component 310 is opened at the lower end of one side of the casing 31, and a raw material recovery box 34 aligned with the discharge port 33 is arranged on the barrel cover 2.

[0042] Optionally, a detachable mesh frame is installed inside the raw material recovery box 34, and the large-particle slurry raw materials intercepted by the screening assembly 310 are discharged from the discharge port 33 into the raw material recovery box 34, and the large-particle slurry raw materials fall into the mesh frame and are poured back into the feed hopper 35 for crushing again until the particle size requirement (less than 0.2 mm) is met.

[0043] The stirring mechanism 4 includes multiple groups of stirring frames 43 rotatably installed inside the stirring barrel 1. The stirring frames 43 are U-shaped stirring frames. A vertically installed auxiliary stirring rod 44 is connected to the stirring frames 43. A plurality of stirring blades 45 are rotatably installed on both the stirring frames 43 and the auxiliary stirring rods 44. The stirring blades 45 are arranged vertically at equal intervals. Through holes 46 are formed in the stirring blades 45, and the stirring blades 45 on the stirring frames 43 and the auxiliary stirring rods 44 are arranged in a staggered manner, which can improve the mixing effect of the ore pulp raw material particles and the flotation reagent.

[0044] A feed inlet 32 is formed at the top of the casing 31. A feed hopper 35 is installed inside the feed inlet 32. The feed hopper 35 is a feed hopper with a funnel-shaped cross-section. The feed hopper 35 is located above the first crushing roller 36, which is convenient for adding ore pulp raw materials into the stirring barrel 1 through the feed hopper 35.

[0045] The first crushing roller 36 and a pair of second crushing rollers 39 are arranged in a staggered manner. Diagonal plates 37 and baffles 38 located between the first crushing roller 36 and the pair of second crushing rollers 39 are also connected to the opposite inner walls inside the casing 31. The baffle 38 is used to prevent the raw materials from splashing. One end of the diagonal plate 37 is located above one of the second crushing rollers 39, and one end of the baffle 38 is located above the other second crushing roller 39.

[0046] The raw materials crushed by the first crushing roller 36 fall onto the diagonal plate 37 and slide down along the diagonal plate 37 to between the pair of second crushing rollers 39, and then are secondarily crushed by the second crushing rollers 39.

[0047] The screening component 310 is arranged obliquely. The screening component 310 includes two groups of side positioning plates 311 fixed on the inner wall of the casing 31. Yielding grooves 312 are formed on the opposite sides of the two groups of side positioning plates 311. A screen mesh 313 for screening ore pulp raw material particles is movably arranged between the two groups of yielding grooves 312.

[0048] Through the movable setting of the screen mesh 313, small-sized raw material particles can quickly fall from the mesh holes, and it is convenient for large-sized raw material particles to slide off the surface of the screen mesh 313.

[0049] A driving component 314 for driving the screen mesh 313 to move horizontally back and forth is installed outside the casing 31. The driving component 314 includes a bracket 3141. A first motor 3142 is installed on the bracket 3141. The first motor 3142 is a servo motor. One end of the output shaft of the first motor 3142 is connected with a抵触块 3143. The side of the抵触块 3143 away from the first motor 3142 is a curved surface with undulating waves.

[0050] A connecting rod 3144 is connected to one side of the screen 313, one end of the connecting rod 3144 passes through one set of side positioning plates 311 and the casing 31 to abut against the abutment block 3143, and a spring 3145 is connected between one side of the screen 313 and the yield groove 312 on one set of side positioning plates 311.

[0051] Optionally, a ball bearing is rotatably mounted on the end of the connecting rod 3144 to ensure that the end of the connecting rod 3144 moves stably on the abutment block 3143 .

[0052] The first motor 3142 rotates to drive the abutment block 3143 to rotate. Since the connecting rod 3144 abuts against the abutment block 3143 and one side of the abutment block 3143 is configured as a wavy curved surface, the connecting rod 3144 can reciprocate, thereby driving the screen 313 to reciprocate.

[0053] The barrel cover 2 is provided with a second motor 41, one end of the output shaft of the second motor 41 is connected to a rotating shaft 42, and a plurality of stirring racks 43 are connected to the outer wall of the rotating shaft 42. The second motor 41 drives the stirring rack 43 and the auxiliary stirring rod 44 to rotate through the rotating shaft 42, and the stirring blade 45 also rotates under the impact of the water flow, so as to fully mix the flotation reagent and the slurry raw material particles.

[0054] The inflation mechanism 5 includes an air pump 51 installed on the barrel cover 2 and an air supply pipe 54 installed on the bottom of the mixing barrel 1. The air pump 51 is a prior art, and its specific parameters and operating principles are not repeated here. An air supply pipe 52 is connected between the air pump 51 and the air supply pipe 54. A plurality of air holes 55 for generating bubbles are opened on the outer wall of the air supply pipe 54, and an air flow regulating component 53 is arranged on the top of the air supply pipe 52.

[0055] The air flow regulating component 53 includes a cover plate 531 fixed on the top of the air supply pipe 52, a knob 532 is rotatably provided on the cover plate 531, a rotating column 533 is connected to the lower end of the knob 532, a sphere 534 is connected to the lower end of the rotating column 533, and a connected air inlet 535 and air outlet 536 are respectively provided on the sphere 534.

[0056] When the air flow needs to be reduced, the knob 532 is turned to drive the ball 534 to rotate, so that the air inlet 535 is misaligned with the internal air flow channel of the horizontal portion of the air delivery pipe 52, thereby reducing the air flow channel.

[0057] Based on the above-described stirring and mixing device for slurry raw material flotation operation, the present invention also provides a method for using the stirring and mixing device for slurry raw material flotation operation, comprising the following steps:

[0058] S1. Crushing of slurry raw materials: driving the first crushing roller 36 and the second crushing roller 39 to rotate, and running the first motor 3142, pouring the slurry raw materials from the feed hopper 35 into the interior of the housing 31, the first crushing roller 36 and the second crushing roller 39 crush the slurry raw materials twice, and the raw material particles fall on the screening component 310, the first motor 3142 drives the screen 313 to move back and forth, and the raw material particles that meet the particle size requirements fall into the mixing barrel 1, and the raw material particles that do not meet the particle size requirements fall from the discharge port 33 into the raw material recovery box 34;

[0059] S2, raw material stirring: add flotation reagent into the stirring barrel 1, operate the second motor 41, drive the stirring frame 43 and the auxiliary stirring rod 44 to rotate through the rotating shaft 42, and the stirring blade 45 also rotates under the impact of the water flow, so as to fully mix the flotation reagent and the slurry raw material particles;

[0060] S3, aeration flotation: after the stirring is completed, the air pump 51 is operated to convey the air flow to the inside of the air delivery pipe 54 through the air delivery pipe 52, and the generated bubbles overflow from the air holes 55, and the bubbles adhere to the useful mineral particles to form mineral bubbles, and float upward to realize the flotation of the slurry raw materials.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stirring and mixing device for slurry raw material flotation operation, characterized in that: The invention comprises a stirring barrel (1), the stirring barrel (1) is provided with a barrel cover (2), the barrel cover (2) is provided with a raw material crushing mechanism (3) for crushing slurry raw materials, the stirring barrel (1) is provided with a stirring mechanism (4) for mixing slurry raw materials and flotation reagents, and an aeration mechanism (5) for flotation slurry raw material particles; The raw material crushing mechanism (3) comprises a casing (31) fixed on the barrel cover (2) and connected to the mixing barrel (1); a pair of first crushing rollers (36) and a pair of second crushing rollers (39) for crushing the slurry raw materials are rotatably installed inside the casing (31); a screening assembly (310) for screening large-particle slurry raw materials is arranged below the second crushing rollers (39); a discharge port (33) aligned with the screening assembly (310) is provided at a lower end of one side of the casing (31); and a raw material recovery box (34) aligned with the discharge port (33) is arranged on the barrel cover (2); The stirring mechanism (4) comprises a plurality of stirring racks (43) rotatably mounted inside the stirring barrel (1), the stirring racks (43) being connected to auxiliary stirring rods (44) mounted vertically, and a plurality of stirring blades (45) being rotatably mounted on both the stirring racks (43) and the auxiliary stirring rods (44); The screening material assembly (310) is arranged in an inclined manner, and the screening material assembly (310) comprises two groups of side positioning plates (311) fixed on the inner wall of the casing (31), and the two groups of side positioning plates (311) are provided with a clearance groove (312) on the opposite side, and a screen (313) for screening slurry raw material particles is movably arranged between the two groups of the clearance grooves (312); A driving assembly (314) for driving the screen (313) to move back and forth laterally is installed on the outer side of the housing (31), and the driving assembly (314) comprises a bracket (3141), a first motor (3142) is installed on the bracket (3141), one end of the output shaft of the first motor (3142) is connected to a resistance block (3143), and a side of the resistance block (3143) away from the first motor (3142) is set as a wavy curved surface; A connecting rod (3144) is connected to one side of the screen (313), one end of the connecting rod (3144) passes through one set of side positioning plates (311) and the casing (31) to abut against the abutment block (3143), and a spring (3145) is connected between one side of the screen (313) and the clearance groove (312) on one set of side positioning plates (311).

2. The stirring and mixing device for slurry raw material flotation operation according to claim 1, characterized in that: A feed port (32) is provided at the top of the casing (31), a feed hopper (35) is installed inside the feed port (32), and the feed hopper (35) is designed to be a feed hopper with a funnel-shaped cross section. The feed hopper (35) is located above the first crushing roller (36).

3. The stirring and mixing device for slurry raw material flotation operation according to claim 1, characterized in that: The first crushing roller (36) and the pair of second crushing rollers (39) are staggered, and an inclined plate (37) and a baffle (38) located between the first crushing roller (36) and the pair of second crushing rollers (39) are connected to two opposite inner walls inside the casing (31), one end of the inclined plate (37) is located above one of the second crushing rollers (39), and one end of the baffle (38) is located above the other second crushing roller (39).

4. The stirring and mixing device for slurry raw material flotation operation according to claim 1, characterized in that: A second motor (41) is installed on the barrel cover (2), one end of the output shaft of the second motor (41) is connected to a rotating shaft (42), and a plurality of groups of stirring racks (43) are connected to the outer wall of the rotating shaft (42).

5. The stirring and mixing device for slurry raw material flotation operation according to claim 1, characterized in that: The inflation mechanism (5) comprises an air pump (51) mounted on the barrel cover (2) and an air supply pipe (54) mounted on the bottom of the mixing barrel (1); an air delivery pipe (52) is connected between the air pump (51) and the air supply pipe (54); a plurality of air holes (55) capable of generating bubbles are formed on the outer wall of the air supply pipe (54); and an air flow regulating component (53) is disposed on the top of the air delivery pipe (52).

6. The stirring and mixing device for slurry raw material flotation operation according to claim 5, characterized in that: The air flow regulating assembly (53) comprises a cover plate (531) fixed on the top of the air delivery pipe (52), a knob (532) is rotatably provided on the cover plate (531), a rotating column (533) is connected to the lower end of the knob (532), a sphere (534) is connected to the lower end of the rotating column (533), and the sphere (534) is respectively provided with an air inlet (535) and an air outlet (536) which are connected to each other.

7. A method for stirring and mixing using the device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Crushing of slurry raw materials: driving the first crushing roller (36) and the second crushing roller (39) to rotate, and operating the first motor (3142), pouring the slurry raw materials from the feed hopper (35) into the interior of the housing (31), the first crushing roller (36) and the second crushing roller (39) crush the slurry raw materials twice, and the raw material particles fall onto the screening component (310), the first motor (3142) drives the screen (313) to move back and forth, and the raw material particles that meet the particle size requirements fall into the mixing barrel (1), and the raw material particles that do not meet the particle size requirements fall from the discharge port (33) into the raw material recovery box (34); S2, raw material stirring: adding a flotation agent into the stirring barrel (1), operating the second motor (41), driving the stirring frame (43) and the auxiliary stirring rod (44) to rotate through the rotating shaft (42), and the stirring blade (45) also rotates under the impact of the water flow, so as to fully mix the flotation agent and the slurry raw material particles; S3, aeration flotation: After the stirring is completed, the air pump (51) is operated to convey the air flow to the inside of the air delivery pipe (54) through the air delivery pipe (52), and the generated bubbles overflow from the air holes (55). The bubbles adhere to the useful mineral particles to form mineral bubbles and float upward to realize the flotation of the ore pulp raw material.

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