A device for mixing and settling ore pulp with reagents and a method of operation thereof

Abstract

The present application relates to the technical field of ore pulp processing, and particularly relates to a kind of ore pulp and reagent mixing and settling device and working method thereof, device includes mixing reaction mechanism, screen mechanism, settling mechanism and mud outlet mechanism, mixing reaction mechanism includes reaction bucket and vortex guide plate in it, bucket cover and reaction bucket side wall are respectively provided with medicine inlet and feed inlet;Reaction bucket bottom is communicated with settling barrel by spiral discharge pipe;Settling mechanism includes settling barrel and water suction port, and water suction port inlet is arranged in settling barrel, and located above screen;Mud outlet mechanism includes spiral blade, mud outlet and mud pump.The present application is provided with spiral vortex guide plate and staggered side baffle, combined with spiral discharge pipe and discharge baffle, so that ore pulp and reagent complete sufficient mixing, stirring and reaction in conveying process;By setting multiple densitometers, the liquid density at each position in the settling barrel is monitored in real time, so as to automatically adjust according to the actual settling condition, thereby improving the settling efficiency and effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ore pulp processing, in particular to an ore pulp and medicament mixing and settling device and a working method thereof. BACKGROUND

[0002] In the process of ore pulp processing, settling is a key step. Traditional ore pulp settling devices often have some shortcomings, such as low mixing reaction degree of ore pulp and medicament, poor settling effect, low settling efficiency, long time required for effective separation of solid particles from ore pulp, poor adaptability to ore pulp of different concentrations and particle size distribution, leading to failure to achieve ideal settling effect when complex ore pulp is processed, and ore pulp blocking phenomenon in the settling process, affecting the quality of the final product and subsequent processing procedures. In addition, most of the existing settling devices and settling schemes adopt manual observation control or timed discharge method, which has low separation efficiency and is difficult to guarantee good settling effect. SUMMARY

[0003] The present application aims to solve the above problems and provides an ore pulp and medicament mixing and settling device and a working method thereof, which adopts the technical scheme as follows.

[0004] An ore pulp and medicament mixing and settling device comprises, from top to bottom, a mixing and reaction mechanism, a screen mechanism, a settling mechanism and a mud discharging mechanism. The mixing and reaction mechanism comprises a reaction barrel and a vortex guide plate in the reaction barrel. A barrel cover is arranged on the top of the reaction barrel. A medicament 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 inward in a spiral shape from the side wall of the reaction barrel. The vortex guide plate protrudes to form a side baffle. The included angle between the side baffle and the extension direction of the vortex guide plate is an acute angle. The lower surfaces of the vortex guide plate and the side baffle are tightly combined with the bottom surface of the reaction barrel. A spiral discharging pipe is arranged at the bottom of the reaction barrel and is in communication with a settling barrel. A discharging baffle is arranged in the spiral discharging pipe. The screen mechanism is arranged in the settling mechanism and comprises a screen and a screen fixing frame. The screen is used to isolate the slurry on the lower side. The screen is fixedly connected to the reaction barrel through the screen fixing frame. The settling mechanism comprises a settling barrel and a water inlet. The bottom of the settling barrel is conical. The water inlet is arranged in the settling barrel and is located above the screen. The mud discharging mechanism comprises a spiral blade, a mud discharging port and a mud discharging pump. The spiral blade is arranged at the center position of the bottom of the settling barrel and is driven and rotated by a blade stirring pump. The mud inlet end of the mud discharging port is arranged at the bottom of the spiral blade.

[0005] On the basis of the above scheme, the side baffles are fixedly connected to the inner and outer sides of the vortex guide plates. The side baffles connected to the two layers of vortex guide plates are arranged in a staggered manner in the gap formed between the two layers of vortex guide plates.

[0006] Preferably, the bottom surface of the reaction barrel is a conical surface. The spiral discharging pipe is arranged at the center position of the bottom of the conical surface.

[0007] Preferably, one side of the discharge baffle plate is closely attached to the inner wall of the spiral discharge pipe, and the chord length of the other side is smaller than the diameter at the connection position of the spiral discharge pipe; the number of the discharge baffle plates is multiple, and they are distributed along the extension direction of the spiral discharge pipe, and the projections of adjacent discharge baffle plates in the length direction of the spiral discharge pipe have overlapping areas.

[0008] Preferably, the spiral discharge pipe is of variable pitch structure, and 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 the vertically downward direction.

[0009] Preferably, the lifting mechanism comprises a fixed guide rail, a lifting motor, a lifting wheel, a lifting belt and a lifting sliding frame; the fixed guide rail is arranged on the side of the settling 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 sliding frame is installed on the lifting belt and lifts with it; and the lifting sliding frame is fixedly connected with the reaction barrel.

[0010] Preferably, the settling mechanism further comprises a liquid level meter and a density meter; the liquid level meter is a non-contact sensor and is arranged above the settling barrel; the number of the density meters is three, including a first density meter, a second density meter and a third density meter arranged in the vertical direction from top to bottom; and the first density meter is arranged above the screen, the second density meter is arranged at the middle part of the settling barrel, and the third density meter is arranged at the lower part of the settling barrel.

[0011] Preferably, the water inlet end of the water suction port moves synchronously with the screen.

[0012] A working method of a mineral slurry and medicament mixing and settling device, using the mineral slurry and medicament mixing and settling device described above, comprising the following steps,

[0013] S1. passing the mineral slurry to be treated and settled into the reaction barrel through the inlet, and passing the medicament used to react with the mineral slurry in the mineral slurry into the reaction barrel through the medicament inlet;

[0014] S2. the mineral slurry and the medicament flow in a spiral path along the vortex guide plate, and local vortex occurs at the side baffle during the flow process for stirring;

[0015] S3. the mixed liquid after the mineral slurry and the medicament are mixed and reacted is discharged into the settling barrel through the spiral discharge pipe, and local vortex occurs at the discharge baffle during the process for further stirring;

[0016] S4. the mixed liquid is statically settled and stratified after entering the settling barrel, and is divided into suspension liquid, low-concentration mineral slurry and high-concentration mineral slurry from top to bottom;

[0017] S5. The suspension liquid spreads upward through the screen mesh, and is discharged outward through the water suction port by using the water suction pump; the high-concentration ore slurry is discharged outward from the bottom of the sedimentation barrel by using the mud discharge mechanism;

[0018] S6. The liquid level meter monitors the liquid level height in the sedimentation barrel in real time, and when the mixed liquid level is lower than the predetermined value, the above steps S1 to S5 are repeated to perform the cyclic mixing and sedimentation.

[0019] On the basis of the above scheme, when the mixed liquid enters the sedimentation barrel and completes the predetermined time of sedimentation, different operation actions are implemented according to the measurement results of the density meters:

[0020] A1. When the first density meter detects that the liquid density above the screen mesh is less than the density of the predetermined discharged suspension liquid, the water suction pump is started, and the suspension liquid above the screen mesh is discharged outward;

[0021] A2. When the third density meter detects that the liquid density at the lower part of the sedimentation barrel is greater than the density of the predetermined discharged high-concentration ore slurry, the blade stirring pump and the mud discharge pump are started to discharge the high-concentration ore slurry through the mud discharge port;

[0022] A3. When the third density meter detects that the liquid density at the lower part of the sedimentation barrel is less than the density of the predetermined discharged high-concentration ore slurry, and the liquid level in the sedimentation barrel is lower than the highest limit, new mixed liquid is injected into the sedimentation barrel through the reaction barrel to perform a new round of sedimentation;

[0023] A4. When the third density meter detects that the liquid density at the lower part of the sedimentation barrel is less than the density of the predetermined discharged high-concentration ore slurry, and the second density meter detects that the liquid density at the middle part of the sedimentation barrel is less than the density of the predetermined discharged suspension liquid, the screen mesh is moved downward to the second density meter, the water suction pump is started, and the suspension liquid above the second density meter is discharged outward; new mixed liquid is injected into the sedimentation barrel through the reaction barrel to perform a new round of sedimentation.

[0024] The beneficial effects of the present application are: by setting the spiral vortex guide plate and the staggered side baffle, combining the spiral discharge pipe and the discharge baffle, the ore slurry and the reagent can be fully mixed, stirred and reacted during the conveying process; by setting the screen mesh to block the ore slurry below the middle part of the sedimentation barrel, the flow area of the ore slurry is reduced, and the sedimentation is accelerated; by setting the lifting mechanism, the height of the mixing and reaction mechanism and the screen mesh mechanism can adapt to different ore slurry input amounts, and the height of the water suction port can be adjusted according to the actual capacity of the suspension liquid in the sedimentation barrel, so that the requirements of different sedimentation working conditions can be met; by setting multiple density meters, the liquid density at each position in the sedimentation barrel can be monitored in real time, so that adjustments can be automatically made according to the actual sedimentation conditions, thereby improving the sedimentation efficiency and effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 : The structural schematic view of the present application;

[0026] Figure 2 : internal structure of the present invention;

[0027] Figure 3 : structure diagram of the mixing reaction mechanism and screen mechanism of the present invention;

[0028] Figure 4 : assembly structure diagram of the vortex guide plate and spiral discharge pipe of the present invention;

[0029] Figure 5 : top view of the vortex guide plate of the present invention;

[0030] Figure 6 : internal structure diagram of the spiral discharge pipe of the present invention;

[0031] Figure 7 : distribution state diagram of the discharge baffle of the spiral discharge pipe of the present invention;

[0032] Figure 8 : installation state diagram of the density meter of the present invention;

[0033] Figure 9 : structure diagram of the mud discharging mechanism of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the drawings and embodiments:

[0035] In the present invention, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0036] In the description of the application, it is to be understood by the terms "center", "length", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can be explicitly or implicitly included one or more features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0037] In the present application, unless otherwise expressly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them. Moreover, the first feature "above", "over" and "on" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the first feature is less than the second feature in horizontal height.

[0038] As shown in Figure 1 and Figure 2 A kind of ore pulp and reagent mixing and settling device, including mixing reaction mechanism, screen mechanism, sedimentation mechanism and out mud mechanism arranged in sequence from top to bottom.

[0039] As shown in Figures 3 to 5As shown, the mixing reaction mechanism comprises a reaction barrel 11 and a vortex guide plate 15 inside the barrel, a barrel cover 12 is arranged on the top of the barrel 11, a medicine inlet 13 and a feed inlet 14 are arranged on the barrel cover 12 and the side wall of the barrel 11 respectively, which are respectively used for inputting medicine and ore pulp, and the medicine inlet 13 is arranged near the side wall and the feed inlet 14. The vortex guide plate 15 extends inwardly from the side wall of the barrel 11 in a spiral shape, the vortex guide plate 15 protrudes outwardly to form a side baffle 16, and there is a gap between the end of the side baffle 16 and the adjacent vortex guide plate 15, which facilitates the flow of liquid. The included angle between the side baffle 16 and the extension direction of the vortex guide plate 15 is an acute angle, so that the liquid can be blocked and a plurality of local vortexes are formed near the position of the side baffle 16, the stirring effect is improved, the substances in the medicine and the ore pulp are fully mixed and reacted, and the smooth flow of the mixed liquid is also ensured, which does not affect the sedimentation efficiency. Preferably, the side baffle 16 is 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 the two layers of vortex guide plates 15, so as to improve the stirring and mixing effect. The lower surfaces of the vortex guide plate 15 and the side baffle 16 are tightly combined with the bottom surface of the 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 formed by the complete vortex guide plate 15, and the mixing and reaction effect is ensured.

[0040] As Figure 6As shown, the bottom of the reaction bucket 11 is communicated with the settling bucket 31 through the spiral discharge pipe 17. Preferably, the bottom surface of the reaction bucket 11 is a conical surface, and the spiral discharge pipe 17 is arranged at the center of the bottom of the conical surface, so as to facilitate the outward discharge of the liquid in the reaction bucket 11 through the spiral discharge pipe 17. The spiral discharge pipe 17 has a variable pitch structure, and the pitch increases in the direction away from the reaction bucket 11. The outer diameter of the spiral discharge pipe 17 gradually decreases in the direction away from the reaction bucket 11, and the bottom end of the spiral discharge pipe 17 is arranged in the vertically downward direction. Through the above structure, the flow path of the liquid is prolonged, the stirring and mixing effects are improved through the spiral path, the smooth discharge of the liquid is ensured, the disturbance is reduced, and the settling efficiency and effect are improved. The spiral discharge pipe 17 is provided with a discharge baffle 18, 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 at the connection position of the spiral discharge pipe 17. Through the arrangement of the discharge baffle 18, the liquid is blocked, a plurality of local vortexes are formed near the position of the discharge baffle 18, the stirring effect is improved, the substances in the medicament and the ore pulp are fully mixed and reacted, and the smooth flow of the mixed liquid is ensured, which does not affect the settling 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 have overlapping areas, or can have no overlapping areas, as shown in Figure 7

[0041] As shown in Figure 2 and Figure 3 , the screen mechanism is arranged in the settling mechanism, including a screen 22 and a screen fixing frame 21. The screen 22 is used to isolate the ore pulp on the lower side, and the screen 22 is fixedly connected to the reaction bucket 11 through the screen fixing frame 21.

[0042] As shown in Figure 2 and Figure 3 , the settling mechanism includes a settling bucket 31 and a water suction port 32. The bottom of the settling bucket 31 is conical, the water inlet end of the water suction port 32 is arranged in the settling bucket 31 and located above the screen 22, and the water suction port 32 is connected to a water suction pump to discharge the suspension liquid above the screen 22. Preferably, the water inlet end of the water suction port 32 is fixedly connected with the screen 22 and moves synchronously with the screen 22.

[0043] The settling mechanism further includes a liquid level meter 33 and a density meter 34. The liquid level meter 33 is a non-contact sensor arranged above the settling bucket 31. The number of the density meters 34 is three, as shown in Figure 8 ​As shown, it comprises a first density meter, a second density meter and a third density meter arranged in sequence from top to bottom along the vertical direction, which are respectively arranged above the screen 22, in the middle of the settling barrel 31 and at the lower part of the settling barrel 31.

[0044] As shown, Figure 2 and Figure 9 As shown, the mud discharging mechanism comprises a spiral blade 41, a mud discharging port 43 and a mud discharging pump 44. The spiral blade 41 is arranged at the center of the bottom of the settling barrel 31 and is driven and rotated by the blade stirring pump 42. The mud inlet end of the mud discharging port 43 is arranged at the bottom of the spiral blade 41. Through the stirring of the spiral blade 41, the coal slurry is prevented from being blocked at the bottom of the settling barrel 31, and the discharging efficiency is improved.

[0045] As shown, Figure 1 It also comprises a lifting mechanism, which comprises a fixed guide rail 51, a lifting motor 52, a lifting wheel 53, a lifting belt 54 and a lifting sliding frame 55. The fixed guide rail 51 is arranged on the side of the settling mechanism along 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 with it. The lifting sliding frame 55 is installed on the lifting belt 54 and lifts with it. The lifting sliding frame 55 is fixedly connected with the reaction barrel 11, so that the lifting of the mixing reaction mechanism and the screen mechanism is controlled by the action of the lifting motor 52.

[0046] A working method of a mineral slurry and medicament mixing and settling device, using the mineral slurry and medicament mixing and settling device, comprising the following steps,

[0047] S1. The mineral slurry to be treated and settled is introduced into the reaction barrel 11 through the inlet 14, and the medicament used to react with the mineral slurry in the mineral slurry is introduced into the reaction barrel 11 through the medicament inlet 13;

[0048] S2. The mineral slurry and the medicament 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 for stirring;

[0049] S3. The mixed liquid after the mineral slurry and the medicament are mixed and reacted is discharged into the settling barrel 31 through the spiral discharge pipe 17, and local vortex occurs at the discharge baffle 18 during the process for further stirring;

[0050] S4. After the mixed liquid enters the settling barrel 31, it is allowed to stand and settle and stratify, and is divided into suspension liquid, low-concentration mineral slurry and high-concentration mineral slurry from top to bottom;

[0051] S5. The suspension liquid spreads upward through the screen 22, and the suspension liquid is discharged outward through the water suction port 32 by using the water suction pump; the high-concentration mineral slurry is discharged outward from the bottom of the settling barrel 31 by the mud discharging mechanism;

[0052] S6. The liquid level meter 33 monitors the liquid level in the settling tank 31 in real time, and when the liquid level is lower than a predetermined value, the above steps S1 to S5 are repeated to perform the cycle of mixing and settling.

[0053] When the mixed liquid enters the settling tank 31 and completes the predetermined time of settling, different operation actions are implemented according to the measurement results of the density meters 34:

[0054] A1. When the first density meter detects that the density of the liquid above the screen 22 is less than the density of the predetermined suspended liquid to be discharged, the water pump is started, and the suspended liquid above the screen 22 is discharged outward;

[0055] A2. When the third density meter detects that the density of the liquid at the lower part of the settling tank 31 is greater than the density of the predetermined high-concentration slurry to be discharged, the blade stirring pump 42 and the slurry discharge pump 44 are started to discharge the high-concentration slurry through the slurry outlet 43;

[0056] A3. When the third density meter detects that the density of the liquid at the lower part of the settling tank 31 is less than the density of the predetermined high-concentration slurry to be discharged, and the liquid level in the settling tank 31 is lower than the highest limit, new mixed liquid is injected into the settling tank 31 through the reaction tank 11 to perform a new round of settling;

[0057] A4. When the third density meter detects that the density of the liquid at the lower part of the settling tank 31 is less than the density of the predetermined high-concentration slurry to be discharged, and the second density meter detects that the density of the liquid at the middle part of the settling tank 31 is less than the density of the predetermined suspended liquid to be discharged, the screen 22 is lowered to the second density meter, the water pump is started, and the suspended liquid above the second density meter is discharged outward; new mixed liquid is injected into the settling tank 31 through the reaction tank 11 to perform a new round of settling.

[0058] The above describes the present application by way of example, but the present application is not limited to the above specific embodiments, and any modification or variation made based on the present application falls within the scope of the present application.

Claims

1. A method for operating a slurry and reagent mixing and settling device, characterized in that, The slurry and reagent mixing and settling device includes a mixing reaction mechanism, a screen mechanism, a settling mechanism and a sludge discharge mechanism arranged sequentially from top to bottom. The mixing reaction mechanism includes a reaction tank (11) and a vortex guide plate (15) inside it. A tank cover (12) is provided on the top of the reaction tank (11). A reagent inlet (13) and a feed inlet (14) are respectively provided on the tank cover (12) and the side wall of the reaction tank (11). The vortex guide plate (15) extends inward in a spiral shape from the side wall of the reaction tank (11). The vortex guide plate (15) protrudes to the side. A side baffle (16) is formed, and the angle between the extension direction of the side baffle (16) and the vortex guide plate (15) is an acute angle. The lower surfaces of the vortex guide plate (15) and the side baffle (16) are in close contact with the bottom surface of the reaction tank (11). The bottom of the reaction tank (11) is connected to the settling tank (31) through a spiral discharge pipe (17), and a discharge baffle (18) is provided inside the spiral discharge pipe (17). A screen mechanism is set inside the settling mechanism, including a screen (22) and a screen fixing frame (21). The screen (22) is used to hold the ore. The slurry is isolated on its lower side, and the screen (22) is fixedly connected to the reaction tank (11) by the screen fixing frame (21); the settling mechanism includes a settling tank (31) and a water inlet (32). The bottom of the settling tank (31) is conical, and the water inlet of the water inlet (32) is located inside the settling tank (31) and above the screen (22); the sludge discharge mechanism includes a spiral blade (41), a sludge outlet (43), and a sludge pump (44). The spiral blade (41) is located at the center of the bottom of the settling tank (31) and is stirred by the blade. The mixing pump (42) is driven and rotated, and the mud inlet (43) is located at the bottom of the spiral blade (41). The settling mechanism also includes a level gauge (33) and a density gauge (34). The level gauge (33) is a non-contact sensor and is located above the settling tank (31). There are three density gauges (34), including a first density gauge, a second density gauge and a third density gauge arranged vertically from top to bottom, respectively located above the screen (22), in the middle of the settling tank (31) and at the bottom of the settling tank (31). The operating method of the slurry and reagent mixing sedimentation device includes the following steps. S1. The slurry to be treated and settled is introduced into the reaction tank (11) through the feed inlet (14), and the reagent to react with the slurry is introduced into the reaction tank (11) through the reagent inlet (13); S2. The slurry and reagents flow inward along the spiral path of the vortex guide plate (15), and local vortices are generated at the side baffle (16) during the flow to stir them. S3. The mixed liquid after the slurry and reagent are mixed and reacted is discharged into the settling tank (31) through the spiral discharge pipe (17). During the process, a local vortex is generated at the discharge baffle (18) for further stirring. S4. After the mixed liquid enters the settling tank (31), it is allowed to settle and separate into layers from top to bottom: suspension, low-concentration slurry and high-concentration slurry. S5. The suspension spreads upward through the screen (22), and the suspension is discharged outward through the water outlet (32) by the water pump; the high-concentration slurry is discharged outward from the bottom of the settling tank (31) by the mud discharge mechanism; S6. The level gauge (33) monitors the liquid level in the settling tank (31) in real time. When the liquid level of the mixed liquid is lower than the predetermined value, the above steps S1 to S5 are repeated to carry out cyclic mixing and settling. After the mixed liquid enters the settling tank (31) and settles for the predetermined time, different operating actions are performed based on the measurement results of the density meter (34): A1. When the first density meter detects that the density of the liquid above the screen (22) is less than the density of the suspension to be discharged, the water pump is started and the suspension above the screen (22) is discharged outward; A2. When the third density meter detects that the liquid density at the bottom of the settling tank (31) is greater than the density of the high-concentration slurry to be discharged, the blade agitator pump (42) and the mud pump (44) are started to discharge the high-concentration slurry through the mud outlet (43). A3. When the third density meter detects that the liquid density at the bottom 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 maximum limit, a new mixed liquid is injected into the settling tank (31) through the reaction tank (11) to carry out a new round of settling. A4. When the third densitometer detects that the liquid density at the bottom of the settling tank (31) is less than the density of the high-concentration slurry to be discharged, and at the same time the second densitometer detects that the liquid density in the middle of the settling 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; a new mixed liquid is injected into the settling tank (31) through the reaction tank (11) to carry out a new round of settling.

2. The working method of the slurry and reagent mixing sedimentation device according to claim 1, characterized in that, The side baffle (16) is fixedly connected to the inner and outer sides of the vortex guide plate (15), and the side baffles (16) connected to the two vortex guide plates (15) are staggered in the gap formed between the two adjacent vortex guide plates (15).

3. The working method of the slurry and reagent mixing sedimentation device according to claim 1, characterized in that, The bottom surface of the reaction vessel (11) is conical, and the spiral discharge pipe (17) is located at the center of the bottom of the conical surface.

4. The working method of the slurry and reagent mixing sedimentation device according to claim 1, characterized in that, The discharge baffle (18) is tightly fitted to the inner wall of the spiral discharge pipe (17) on one side, and the chord length of the other side is smaller than the diameter at the connection position with the spiral discharge pipe (17); there are multiple discharge baffles (18), which 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 overlapping areas.

5. The working method of the slurry and reagent mixing sedimentation device according to claim 1, characterized in that, The spiral discharge pipe (17) has a variable pitch structure, with the pitch increasing in the direction away from the reaction tank (11); the outer diameter of the spiral discharge pipe (17) gradually decreases in the direction away from the reaction tank (11), and the bottom end of the spiral discharge pipe (17) is set in the vertically downward direction.

6. The operating method of the slurry and reagent mixing sedimentation device according to claim 1, characterized in that, 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 sliding frame (55). The fixed guide rail (51) is arranged vertically on the side of the settling mechanism. 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 lifting wheel (53) and moves with it. The lifting sliding frame (55) is installed on the lifting belt (54) and moves up and down with it. The lifting sliding frame (55) is fixedly connected to the reaction tank (11).

7. The operating method of the slurry and reagent mixing sedimentation device according to claim 6, characterized in that, The water inlet of the pump (32) moves synchronously with the screen (22).

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