Ore pulp and medicament mixed sedimentation device and working method thereof

Abstract

The invention relates to the technical field of ore pulp treatment, in particular to an ore pulp and agent mixing and settling device and a working method thereof.The device comprises a mixing reaction mechanism, a screen mechanism, a settling mechanism and a mud discharging mechanism, the mixing reaction mechanism comprises a reaction barrel and a vortex-shaped guide plate in the reaction barrel, and a barrel cover and the side wall of the reaction barrel are provided with an agent inlet and a material inlet respectively; the bottom of the reaction barrel is communicated with the settling barrel through a spiral discharge pipe; the settling mechanism comprises a settling barrel and a water pumping opening, and the water inlet end of the water pumping opening is arranged in the settling barrel and located above the screen; and the sludge discharging mechanism comprises a spiral blade, a sludge outlet and a sludge discharging pump. The spiral vortex-shaped guide plate and the staggered side baffles are arranged, and the spiral discharging pipe and the discharging baffles are combined, so that ore pulp and chemicals are fully mixed, stirred and reacted in the conveying process; by arranging a plurality of densimeters, the density of liquid at each position in the settling vat is monitored in real time, so that adjustment is automatically made according to the actual settling condition, and the settling efficiency and effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ore pulp treatment, in particular to an ore pulp and reagent mixing sedimentation device and a working method thereof. Background Art

[0002] Sedimentation is a key step in the slurry treatment process. Traditional slurry sedimentation devices often have some shortcomings, such as low degree of reaction between slurry and drug mixture and poor sedimentation effect; low sedimentation efficiency, requiring a long time to effectively separate solid particles from slurry; poor adaptability to slurries of different concentrations and particle size distributions, resulting in the inability to achieve ideal sedimentation effects when treating complex slurries; and slurry blockage is prone to occur during the sedimentation process, affecting the quality of the final product and subsequent processing procedures. In addition, most of the existing sedimentation devices and sedimentation schemes use manual observation control or timed discharge methods, which have low separation efficiency and are difficult to ensure a good sedimentation effect. Summary of the invention

[0003] The present invention aims to solve the above problems and provides a slurry and reagent mixing sedimentation device and a working method thereof. The technical solution adopted is as follows: A slurry and reagent mixing and settling device, comprising a mixing reaction mechanism, a screen mechanism, a settling mechanism and a mud discharge mechanism arranged in sequence from top to bottom, the mixing reaction mechanism comprising a reaction barrel and a vortex guide plate therein, a barrel cover is arranged on the top of the reaction barrel, a drug inlet and a material inlet are arranged on the barrel cover and the side wall of the reaction barrel respectively, the vortex guide plate extends inwardly from the side wall of the reaction barrel in a spiral shape, the vortex guide plate protrudes to the side to form a side baffle plate, the angle between the side baffle plate and the extension direction of the vortex guide plate is an acute angle, and the lower surfaces of the vortex guide plate and the side baffle plate are closely fitted to the bottom surface of the reaction barrel; the bottom of the reaction barrel is connected by a spiral discharge pipe It is connected to the sedimentation barrel, and a discharge baffle is arranged in the spiral discharge pipe; the screen mechanism is arranged in the sedimentation mechanism, including a screen and a screen fixing frame, the screen is used to isolate the mud on its lower side, and the screen is fixedly connected to the reaction barrel through the screen fixing frame; the sedimentation mechanism includes a sedimentation barrel and a water suction port, the bottom of the sedimentation barrel is conical, the water inlet end of the water suction port is arranged in the sedimentation barrel, and is located above the screen; the mud discharge mechanism includes a spiral blade, a mud discharge port and a mud discharge pump, the spiral blade is arranged at the center of the bottom of the sedimentation barrel, and is driven and rotated by a blade stirring pump, and the mud inlet end of the mud discharge port is arranged at the bottom of the spiral blade.

[0004] On the basis of the above scheme, the side baffles are fixedly connected to the inner and outer sides of the vortex guide plates, and the side baffles connected to the two layers of vortex guide plates are arranged alternately in the gap formed between two adjacent layers of vortex guide plates.

[0005] Preferably, the bottom surface of the reaction barrel is a conical surface, and the spiral discharge pipe is arranged at the center of the bottom of the conical surface.

[0006] Preferably, one side of the discharge baffle is tightly fitted with the inner wall of the spiral discharge pipe, and the chord length of the other side is smaller than the diameter of the position where it is connected to the spiral discharge pipe; there are multiple discharge baffles, and they are distributed along the extension direction of the spiral discharge pipe, and the projections of adjacent discharge baffles in the length direction of the spiral discharge pipe have an overlapping area.

[0007] Preferably, the spiral discharge pipe is a variable pitch structure, the pitch increases in the direction away from the reaction barrel; the outer diameter of the spiral discharge pipe gradually decreases in the direction away from the reaction barrel, and the bottom end of the spiral discharge pipe is arranged in a vertical downward direction.

[0008] Preferably, it also includes a lifting mechanism, which includes a fixed guide rail, a lifting motor, a lifting wheel, a lifting belt and a lifting slide frame. The fixed guide rail is arranged on the side of the sedimentation mechanism in the vertical direction. The lifting wheel is rotatably arranged on the fixed guide rail and is driven and rotated by the lifting motor. The lifting belt is sleeved outside the lifting wheel and moves with it. The lifting slide frame is installed on the lifting belt and rises and falls with it. The lifting slide frame is fixedly connected to the reaction barrel.

[0009] Preferably, the sedimentation mechanism also includes a liquid level meter and a density meter. The liquid level meter is a contactless sensor and is arranged above the sedimentation barrel. The number of the density meters is 3, including a first density meter, a second density meter and a third density meter arranged in sequence from top to bottom in the vertical direction, and are respectively arranged above the screen, in the middle of the sedimentation barrel and at the bottom of the sedimentation barrel.

[0010] Preferably, the water inlet end of the water pumping port moves synchronously with the screen.

[0011] A working method of a slurry and reagent mixing and settling device, using the slurry and reagent mixing and settling device, comprises the following steps: S1. The slurry to be treated and settled is introduced into the reaction barrel through the feed port, and the reagent for reacting with the slurry in the slurry is introduced into the reaction barrel through the drug inlet; S2. The slurry and reagent flow inward along the vortex guide plate in a spiral path, and local vortexes occur at the side baffles during the flow process to stir; S3. The mixed liquid after the slurry and the reagent are mixed and reacted is discharged into the settling barrel through the spiral discharge pipe. During the process, a local vortex occurs at the discharge baffle for further stirring; S4. After the mixed liquid enters the sedimentation tank, it is allowed to settle and separate into layers, from top to bottom, into suspension, low-concentration slurry and high-concentration slurry; S5. The suspended liquid spreads upward through the screen, and the suspended liquid is discharged outward through the water pump through the water pumping port; the high-concentration slurry is discharged outward from the bottom of the sedimentation tank by the mud discharge mechanism; S6. The liquid level meter monitors the liquid level in the sedimentation tank in real time. When the mixed liquid level is lower than a predetermined value, the above steps S1 to S5 are repeated to perform cyclic mixing and sedimentation.

[0012] On the basis of the above scheme, when the mixed liquid enters the sedimentation tank and completes the predetermined sedimentation time, different operation actions are implemented according to the measurement results of the density meter: A1. When the first densitometer detects that the density of the liquid above the screen is less than the density of the predetermined suspension to be discharged, the water pump starts and discharges the suspension above the screen; A2. When the third densitometer detects that the density of the liquid at the bottom of the sedimentation tank is greater than the density of the high-concentration slurry to be discharged, the blade stirring pump and the mud discharge pump are started to discharge the high-concentration slurry through the mud discharge port; A3. When the third densitometer detects that the density of the liquid in the lower part of the settling tank is less than the density of the high-concentration slurry to be discharged, and the liquid level in the settling tank is lower than the upper limit, new mixed liquid is injected into the settling tank through the reaction tank to carry out a new round of settling; A4. When the third densitometer detects that the density of the liquid in the lower part of the sedimentation tank is less than the density of the high-concentration slurry to be discharged, and the second densitometer detects that the density of the liquid in the middle part of the sedimentation tank is less than the density of the suspension to be discharged, the screen moves down to the second densitometer, the pump starts, and the suspension above the second densitometer is discharged outward; new mixed liquid is injected into the sedimentation tank through the reaction tank to carry out a new round of sedimentation.

[0013] The beneficial effects of the present invention are as follows: by arranging a spiral vortex guide plate and staggered side baffles, in combination with a spiral discharge pipe and a discharge baffle, the ore pulp and the reagent are fully mixed, stirred and reacted during the transportation process; by arranging a screen, the ore pulp is blocked below the middle of the sedimentation barrel, the flow area of ​​the ore pulp is reduced, and the sedimentation is accelerated; by arranging a lifting mechanism, the height of the mixing reaction mechanism and the screen mechanism is adapted to different ore pulp input amounts, and the height of the water pumping port can be adjusted according to the actual capacity of the suspension in the sedimentation barrel to meet the requirements of different sedimentation conditions; by arranging a plurality of density meters, the liquid density at each position in the sedimentation barrel is monitored in real time, so that adjustments are automatically made according to the actual sedimentation conditions, thereby improving the sedimentation efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : Schematic diagram of the structure of the present invention; Figure 2 : A cross-sectional view of the internal structure of the present invention; Figure 3 : Schematic diagram of the structure of the mixing reaction mechanism and the screen mechanism of the present invention; Figure 4 : Schematic diagram of the assembly structure of the vortex guide plate and the spiral discharge pipe of the present invention; Figure 5 : A top view of the vortex guide plate of the present invention; Figure 6 : Schematic diagram of the internal structure of the spiral discharge pipe of the present invention; Figure 7 : Schematic diagram of the distribution state of the discharge baffle of the spiral discharge pipe of the present invention; Figure 8 : Schematic diagram of the installation state of the density meter of the present invention; Fig. 9 : Schematic diagram of the structure of the mud discharge mechanism of the present invention. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0017] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0018] like Figure 1 and Figure 2 As shown, a slurry and reagent mixing and sedimentation device includes a mixing reaction mechanism, a screen mechanism, a sedimentation mechanism and a mud discharge mechanism which are arranged in sequence from top to bottom.

[0019] like Figures 3 to 5 As shown, the mixing reaction mechanism includes a reaction barrel 11 and a vortex guide plate 15 therein. A barrel cover 12 is arranged on the top of the reaction barrel 11. A drug inlet 13 and a material inlet 14 are arranged on the barrel cover 12 and the side wall of the reaction barrel 11, respectively, for inputting reagents and ore pulp into the inside. The drug inlet 13 is arranged at a position close to the side wall and the material inlet 14. The vortex guide plate 15 extends inwardly from the side wall of the reaction barrel 11 in a spiral shape, and the vortex guide plate 15 protrudes to the side to form a side baffle plate 16. There is a gap between the end of the side baffle plate 16 and the adjacent vortex guide plate 15, which is convenient for liquid to pass through. The angle between the side baffle plate 16 and the extension direction of the vortex guide plate 15 is an acute angle, so that it can not only block the liquid, but also form a continuous plurality of local vortices near the position of the side baffle plate 16, thereby improving the stirring effect, so that the reagent and the substances in the ore pulp can be fully mixed and reacted, and at the same time, it can also ensure the smooth flow of the mixed liquid without affecting the sedimentation efficiency. Preferably, the side baffles 16 are fixedly connected to the inner and outer sides of the vortex guide plate 15, and the side baffles 16 connected to the two layers of vortex guide plates 15 are arranged in a staggered manner in the gap formed between two adjacent layers of vortex guide plates 15, thereby improving the stirring and mixing effect. The lower surfaces of the vortex guide plate 15 and the side baffles 16 are tightly fitted to the bottom surface of the reaction barrel 11, so that the input mixed liquid can only flow out from the end position of the vortex guide plate 15 through the channel enclosed by the complete vortex guide plate 15, thereby ensuring the mixing and reaction effect.

[0020] like Figure 6As shown, the bottom of the reaction barrel 11 is connected to the sedimentation barrel 31 through a spiral discharge pipe 17. Preferably, the bottom surface of the reaction barrel 11 is a conical surface, and the spiral discharge pipe 17 is arranged at the center of the bottom of the conical surface, so that the liquid in the reaction barrel 11 can be discharged outward through the spiral discharge pipe 17. The spiral discharge pipe 17 is a variable pitch structure, and the pitch increases in the direction away from the reaction barrel 11; the outer diameter of the spiral discharge pipe 17 gradually decreases in the direction away from the reaction barrel 11, and the bottom end of the spiral discharge pipe 17 is arranged in a vertical downward direction. Through the above structure, firstly, the flow path of the liquid is extended, and the stirring and mixing effects are improved through the spiral path; secondly, the smooth discharge of the liquid is ensured without affecting the sedimentation efficiency; thirdly, through the vertical discharge path at the end, the large vortex generated after the mixed liquid enters the sedimentation barrel 31 is avoided to the greatest extent, the disturbance is reduced, and the sedimentation efficiency and effect are improved. A discharge baffle 18 is provided in the spiral discharge pipe 17, one side of the discharge baffle 18 is tightly fitted with the inner wall of the spiral discharge pipe 17, and the chord length of the other side is smaller than the diameter of the position where it is connected to the spiral discharge pipe 17; by providing the discharge baffle 18, it can not only block the liquid, but also form multiple continuous local vortices near the position of the discharge baffle 18 to improve the stirring effect, so that the reagent and the substances in the slurry can be fully mixed and reacted, and at the same time, it can also ensure the smooth flow of the mixed liquid without affecting the sedimentation efficiency. The number of the discharge baffles 18 is multiple, and they are distributed along the extension direction of the spiral discharge pipe 17. The projections of adjacent discharge baffles 18 in the length direction of the spiral discharge pipe 17 may have overlapping areas, or may not have overlapping areas, such as Figure 7 shown.

[0021] like Figure 2 and Figure 3 As shown, the screen mechanism is arranged in the sedimentation mechanism, including a screen 22 and a screen fixing frame 21 . The screen 22 is used to isolate the slurry at its lower side. The screen 22 is fixedly connected to the reaction barrel 11 through the screen fixing frame 21 .

[0022] like Figure 2 and Figure 3 As shown, the sedimentation mechanism includes a sedimentation barrel 31 and a water pumping port 32. The bottom of the sedimentation barrel 31 is conical. The water inlet end of the water pumping port 32 is arranged in the sedimentation barrel 31 and is located above the screen 22. The water pumping port 32 is connected to a water pump to pump out the suspension above the screen 22. Preferably, the water inlet end of the water pumping port 32 is fixedly connected to the screen 22 and moves synchronously with the screen 22.

[0023] The sedimentation mechanism also includes a liquid level meter 33 and a density meter 34. The liquid level meter 33 is a contactless sensor and is arranged above the sedimentation bucket 31. The number of the density meters 34 is 3. Figure 8As shown, the first density meter, the second density meter and the third density meter are arranged in sequence from top to bottom along the vertical direction, and are respectively set above the screen 22, in the middle of the sedimentation barrel 31 and at the bottom of the sedimentation barrel 31.

[0024] like Figure 2 and Fig. 9 As shown, the mud discharge mechanism 41 includes a spiral blade 41, a mud discharge port 43 and a mud discharge pump 44. The spiral blade 41 is arranged at the center of the bottom of the sedimentation barrel 31 and is driven and rotated by a blade stirring pump 42. The mud inlet end of the mud discharge port 43 is arranged at the bottom of the spiral blade 41. The stirring of the spiral blade 41 can prevent the coal mud from being blocked at the bottom of the sedimentation barrel 31, thereby improving the discharge efficiency.

[0025] like Figure 1 As shown, it also includes a lifting mechanism, which includes a fixed guide rail 51, a lifting motor 52, a lifting wheel 53, a lifting belt 54 and a lifting slide frame 55. The fixed guide rail 51 is arranged on the side of the sedimentation mechanism in the vertical direction. The lifting wheel 53 is rotatably arranged on the fixed guide rail 51 and is driven and rotated by the lifting motor 52. The lifting belt 54 is sleeved on the outside of the lifting wheel 53 and moves therewith. The lifting slide frame 55 is installed on the lifting belt 54 and rises and falls therewith. The lifting slide frame 55 is fixedly connected to the reaction barrel 11, so that the lifting and lowering of the mixing reaction mechanism and the screen mechanism are controlled by the action of the lifting motor 52.

[0026] A working method of a slurry and reagent mixing and settling device, using the slurry and reagent mixing and settling device, comprising the following steps: S1. The slurry to be treated and settled is introduced into the reaction barrel 11 through the feed port 14, and the reagent for reacting with the slurry in the slurry is introduced into the reaction barrel 11 through the drug inlet 13; S2. The slurry and reagent flow inward along the vortex guide plate 15 in a spiral path, and local vortex occurs at the side baffle 16 during the flow process to stir; S3. The mixed liquid after the slurry and the reagent are mixed and reacted is discharged into the settling barrel 31 through the spiral discharge pipe 17. During the process, a local vortex occurs at the discharge baffle 18 for further stirring; S4. After the mixed liquid enters the settling tank 31, it is allowed to settle and stratify, and is divided into a suspension, a low-concentration slurry and a high-concentration slurry from top to bottom; S5. The suspension spreads upward through the screen 22, and the suspension is discharged outward through the pumping port 32 by a pump; the high-concentration slurry is discharged outward from the bottom of the sedimentation barrel 31 by the mud discharge mechanism; S6. The liquid level meter 33 monitors the liquid level in the sedimentation tank 31 in real time. When the mixed liquid level is lower than a predetermined value, the above steps S1 to S5 are repeated to perform cyclic mixing and sedimentation.

[0027] When the mixed liquid enters the sedimentation tank 31 and completes the sedimentation for a predetermined time, different operation actions are performed according to the measurement results of the density meter 34: A1. When the first densitometer detects that the density of the liquid above the screen 22 is less than the density of the predetermined suspension to be discharged, the pump is started and the suspension above the screen 22 is discharged outward; A2. When the third densitometer detects that the density of the liquid in the lower part of the settling barrel 31 is greater than the density of the high-concentration slurry to be discharged, the blade stirring pump 42 and the mud pump 44 are started to discharge the high-concentration slurry through the mud outlet 43; A3. When the third densitometer detects that the density of the liquid in the lower part of the settling tank 31 is less than the density of the high-concentration slurry to be discharged, and the liquid level in the settling tank 31 is lower than the upper limit, a new mixed liquid is injected into the settling tank 31 through the reaction tank 11 to perform a new round of settling; A4. When the third densitometer detects that the liquid density in the lower part of the sedimentation tank 31 is less than the density of the high-concentration slurry to be discharged, and the second densitometer detects that the liquid density in the middle part of the sedimentation tank 31 is less than the density of the suspension to be discharged, the screen 22 moves down to the second densitometer, the water pump starts, and the suspension above the second densitometer is discharged outward; new mixed liquid is injected into the sedimentation tank 31 through the reaction tank 11 to carry out a new round of sedimentation.

[0028] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A slurry and reagent mixing and settling device, characterized in that: The invention comprises a mixing reaction mechanism, a screen mechanism, a sedimentation mechanism and a mud discharge mechanism which are arranged in sequence from top to bottom. The mixing reaction mechanism comprises a reaction barrel (11) and a spiral guide plate (15) therein. A barrel cover (12) is arranged on the top of the reaction barrel (11). A drug inlet (13) and a material inlet (14) are arranged on the barrel cover (12) and the side wall of the reaction barrel (11), respectively. The spiral guide plate (15) extends inwardly from the side wall of the reaction barrel (11) in a spiral shape. The spiral guide plate (15) protrudes to the side to form a side baffle plate (16). The angle between the side baffle plate (16) and the extension direction of the spiral guide plate (15) is an acute angle. The lower surfaces of the spiral guide plate (15) and the side baffle plate (16) are both tightly fitted with the bottom surface of the reaction barrel (11). The bottom of the reaction barrel (11) is connected to the sedimentation barrel (31) through a spiral discharge pipe (17). The spiral discharge pipe (17) is connected to the sedimentation barrel (31). A discharge baffle (18) is arranged in the pipe (17); a screen mechanism is arranged in the sedimentation mechanism, comprising a screen (22) and a screen fixing frame (21); the screen (22) is used to isolate the slurry at its lower side; the screen (22) is fixedly connected to the reaction barrel (11) through the screen fixing frame (21); the sedimentation mechanism comprises a sedimentation barrel (31) and a water pumping port (32); the bottom of the sedimentation barrel (31) is conical; the water inlet end of the water pumping port (32) is arranged in the sedimentation barrel (31) and is located above the screen (22); the mud discharge mechanism (41) comprises a spiral blade (41), a mud discharge port (43) and a mud discharge pump (44); the spiral blade (41) is arranged at the center of the bottom of the sedimentation barrel (31) and is driven and rotated by the blade stirring pump (42); the mud inlet end of the mud discharge port (43) is arranged at the bottom of the spiral blade (41).

2. A slurry and reagent mixing and settling device according to claim 1, characterized in that: The side baffles (16) are fixedly connected to the inner and outer sides of the vortex guide plates (15), and the side baffles (16) connected to the two layers of vortex guide plates (15) are arranged in a staggered manner in a gap formed between two adjacent layers of vortex guide plates (15).

3. The slurry and reagent mixing and settling device according to claim 1, characterized in that: The bottom surface of the reaction barrel (11) is a conical surface, and the spiral discharge pipe (17) is arranged at the center position of the bottom of the conical surface.

4. The slurry and reagent mixing and settling device according to claim 1, characterized in that: One side of the discharge baffle (18) is tightly fitted with the inner wall of the spiral discharge pipe (17), and the chord length of the other side is smaller than the diameter of the position where it is connected to the spiral discharge pipe (17); the number of the discharge baffles (18) is multiple and they are distributed along the extension direction of the spiral discharge pipe (17), and the projections of adjacent discharge baffles (18) in the length direction of the spiral discharge pipe (17) have an overlapping area.

5. The slurry and reagent mixing and settling device according to claim 1, characterized in that: The spiral discharge pipe (17) is a variable pitch structure, the pitch of which increases in a direction away from the reaction barrel (11); the outer diameter of the spiral discharge pipe (17) gradually decreases in a direction away from the reaction barrel (11), and the bottom end of the spiral discharge pipe (17) is arranged in a vertically downward direction.

6. The slurry and reagent mixing and settling device according to claim 1, characterized in that: The device also includes a lifting mechanism, which includes a fixed guide rail (51), a lifting motor (52), a lifting wheel (53), a lifting belt (54) and a lifting slide frame (55). The fixed guide rail (51) is arranged on the side of the sedimentation mechanism in the vertical direction. The lifting wheel (53) is rotatably arranged on the fixed guide rail (51) and is driven and rotated by the lifting motor (52). The lifting belt (54) is sleeved outside the lifting wheel (53) and moves therewith. The lifting slide frame (55) is installed on the lifting belt (54) and rises and falls therewith. The lifting slide frame (55) is fixedly connected to the reaction barrel (11).

7. The slurry and reagent mixing and settling device according to claim 1, characterized in that: The sedimentation mechanism further comprises a liquid level meter (33) and a density meter (34); the liquid level meter (33) is a contactless sensor and is arranged above the sedimentation barrel (31); the number of the density meters (34) is three, including a first density meter, a second density meter and a third density meter which are arranged in sequence from top to bottom in the vertical direction and are respectively arranged above the screen (22), in the middle of the sedimentation barrel (31) and at the bottom of the sedimentation barrel (31).

8. The slurry and reagent mixing and settling device according to claim 6, characterized in that: The water inlet end of the water pumping port (32) moves synchronously with the screen (22).

9. A working method of a slurry and reagent mixing and settling device, characterized in that: The use of the slurry and reagent mixing and settling device as claimed in any one of claims 1 to 8 comprises the following steps: S1. The ore slurry to be treated and settled is introduced into the reaction barrel (11) through the feed port (14), and the reagent for reacting with the ore slurry in the ore slurry is introduced into the reaction barrel (11) through the drug inlet (13); S2. The slurry and the reagent flow inward along the vortex guide plate (15) in a spiral path, and a local vortex occurs at the side baffle (16) during the flow to stir; S3. The mixed liquid after the slurry and the reagent are mixed and reacted is discharged into the settling barrel (31) through the spiral discharge pipe (17). During the process, a local vortex occurs at the discharge baffle (18) for further stirring; S4. After the mixed liquid enters the sedimentation tank (31), it is allowed to settle and separate into layers, from top to bottom, into a suspension, a low-concentration slurry and a high-concentration slurry; S5. The suspension spreads upward through the screen (22), and the suspension is discharged outward through the pumping port (32) by a water pump; the high-concentration slurry is discharged outward from the bottom of the sedimentation barrel (31) by the mud discharge mechanism; S6. The liquid level meter (33) monitors the liquid level in the sedimentation tank (31) in real time. When the mixed liquid level is lower than a predetermined value, the above steps S1 to S5 are repeated to perform cyclic mixing and sedimentation.

10. The working method of the slurry and reagent mixing and settling device according to claim 9, characterized in that: When the mixed liquid enters the sedimentation barrel (31) and completes the sedimentation for a predetermined time, different operation actions are performed according to the measurement results of the density meter (34): A1. When the first densitometer detects that the density of the liquid above the screen (22) is less than the density of the predetermined suspension to be discharged, the water pump is started to discharge the suspension above the screen (22); A2. When the third densitometer detects that the density of the liquid at the bottom of the sedimentation barrel (31) is greater than the density of the high-concentration slurry to be discharged, the blade stirring pump (42) and the mud discharge pump (44) are started to discharge the high-concentration slurry through the mud discharge port (43); A3. When the third densitometer detects that the density of the liquid in the lower part of the settling barrel (31) is less than the density of the high-concentration slurry to be discharged, and the liquid level in the settling barrel (31) is lower than the upper limit, new mixed liquid is injected into the settling barrel (31) through the reaction barrel (11) to perform a new round of settling; A4. When the third densitometer detects that the density of the liquid in the lower part of the sedimentation tank (31) is less than the density of the high-concentration slurry to be discharged, and the second densitometer detects that the density of the liquid in the middle part of the sedimentation tank (31) is less than the density of the suspension to be discharged, the screen (22) moves down to the second densitometer, the pump is started, and the suspension above the second densitometer is discharged outward; new mixed liquid is injected into the sedimentation tank (31) through the reaction tank (11) to carry out a new round of sedimentation.

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