Efficient dust removal lime sand premixing device and using method

Abstract

The invention discloses an efficient dust-removing lime sand premixing device and a using method, and belongs to the technical field of mine filling. The efficient dust-removing lime sand premixing device comprises a barrel, a feeding port is formed in the top of the barrel, and a discharging port is formed in the bottom of the barrel; a plurality of nozzles are annularly arranged on the inner wall of the cylinder body, the plurality of nozzles are arranged at the lower part of the feeding hole, a plurality of water inlets are formed in the outer wall of the cylinder body, and the plurality of water inlets are respectively connected with the plurality of nozzles; a slurry inlet is also formed in the cylinder body and is formed in the lower part of the water inlet; spiral plates are arranged on the inner wall of the barrel from top to bottom, the upper starting points of the spiral plates correspond to the slurry inlet in position, and the lower end points of the spiral plates extend to the upper end of the discharge port. The nozzle is arranged to mix cement ash raised dust to achieve dust falling, the spiral plate is arranged to enable cement paste to fall into mortar to form vortex to further prevent the cement ash raised dust, an unpowered mode is adopted to replace an existing dust removal fan in the whole, sufficient cement in the required proportion participates in preparation of filling slurry, and the preparation quality of the slurry is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of mine filling, and particularly relates to an efficient premixing device for dust-eliminating ash and sand and a using method thereof. Background Art

[0002] In the technical field of mine filling, the preparation of filling slurry is a key link related to the strength of the filling body. In the current preparation methods, mortar, cement powder and water are usually continuously added into a high-speed stirring barrel, and the in-and-out balance of the material level in the stirring barrel is manually or automatically controlled to achieve the continuous preparation of the slurry of water, sand and ash.

[0003] In the prior art, since the stirring barrel cannot be completely sealed, when adding cement ash, the cement dust is easily raised and ejected from the gap of the barrel cover. To avoid the ejection of dust, usually a dust removal fan is arranged above the barrel cover of the stirring barrel. When adding cement ash, the fan is started, and the cement ash suspended in the space in the barrel is sucked away by the suction generated by the fan. After being sucked away, the cement ash will be collected and then added to the stirring barrel again for stirring.

[0004] In this process, due to the poor matching between the suction of the dust removal fan and the dust raising situation of the cement ash, when the cement ash is added according to the standard ratio, if the suction of the fan is too large, in addition to the dust to be sucked away, a part of the cement ash will be raised during the addition and fail to participate in the preparation of the filling slurry and will be sucked away, affecting the standard of the slurry ratio and making the strength of the prepared slurry not meet the standard.

[0005] Moreover, during the addition of the cement ash, for the process that the sucked-away cement ash will be collected and then added to the stirring barrel again for stirring, not only does it increase the loss of the cement ash, but also this entire cyclic operation increases the production energy consumption of the entire slurry and raises the production cost.

[0006] In addition, when the existing filling slurry is prepared, the cement ash is usually directly poured into the ore pulp in the stirring barrel. Since a large amount of cement ash cannot be quickly dissolved after directly contacting the ore pulp, problems such as insufficient dissolution of the cement ash and the ore pulp and frequent clotting easily occur, affecting the quality of the filling slurry. Summary of the Invention

[0007] In view of the problems existing in the prior art, the present invention provides an efficient premixing device for dust and sand and a usage method. Nozzles are provided to fuse the cement dust and raise dust, and spiral plates are provided to make the cement slurry fall into the mortar to form a vortex to further prevent the cement dust from raising dust. As a whole, a non-powered form is adopted to replace the existing dust removal fan to remove the dust generated during the addition of cement ash, so that the cement within the required ratio participates in the preparation of the filling slurry in sufficient quantity, ensuring the quality of the slurry preparation. At the same time, the cement is premixed and dissolved in the device in advance after the above steps, and then through the high-speed stirring of the mixing barrel, the insufficient dissolution is avoided, further ensuring the quality of the slurry preparation and reducing the production energy consumption and production cost of the slurry.

[0008] The technical solution of the present invention is as follows:

[0009] In the first aspect of the present invention, an efficient premixing device for dust and sand is provided, including a cylinder body. The top of the cylinder body is provided with a feed inlet, and the bottom of the cylinder body is provided with a discharge outlet; a plurality of nozzles are annularly arranged on the inner wall of the cylinder body, and the plurality of nozzles are arranged below the feed inlet. A plurality of water inlets are provided on the outer wall of the cylinder body, and the plurality of water inlets are respectively connected to the plurality of nozzles; a slurry inlet is further provided on the cylinder body, and the slurry inlet is arranged below the water inlet; a spiral plate is arranged on the inner wall of the cylinder body from top to bottom, and the upper starting point of the spiral plate corresponds to the position of the slurry inlet, and the lower end point of the spiral plate extends to the upper end of the discharge outlet.

[0010] In some embodiments of the present invention, the upper part of the cylinder body is a hollow cylindrical structure, and the lower part of the cylinder body is a conical structure. The diameter of the discharge outlet at the lower part of the cylinder body is smaller than the diameter of the cylinder body.

[0011] In some embodiments of the present invention, the axial length of the conical structure at the lower part of the cylinder body is smaller than the axial length of the hollow cylindrical structure at the upper part of the cylinder body.

[0012] In some embodiments of the present invention, the feed inlet is detachably connected to the top of the cylinder body.

[0013] In some embodiments of the present invention, the diameter of the feed inlet is smaller than the diameter of the cylinder body.

[0014] In some embodiments of the present invention, a top cover is provided at the top of the feed inlet.

[0015] In some embodiments of the present invention, the plurality of nozzles are annularly and evenly distributed on the inner wall of the cylinder body.

[0016] In some embodiments of the present invention, the height of the upper starting point of the spiral plate is equal to or less than the height of the lower edge of the slurry inlet.

[0017] In some embodiments of the present invention, the axis of the slurry inlet is tangentially arranged with the circular outer wall of the cylinder body.

[0018] In a second aspect of the present invention, a method for using an efficient premixing device for dust-removing ash and sand is provided, including:

[0019] Dock the feed inlet with the cement silo delivery port, and arrange the discharge port towards the inside of the mixing barrel;

[0020] Cement ash is added from the top feed inlet, water is supplied to multiple nozzles, and a mortar feed inlet is provided below the nozzles to add mortar;

[0021] Multiple nozzles spray water mist simultaneously to dissolve the cement ash in water to form cement slurry. After the cement slurry falls into the mortar, the cement slurry, water, and mortar flow downward along the spiral plate by their own weights to form a vortex for mixing to form a slurry;

[0022] The slurry flows into the mixing barrel through the discharge port for stirring.

[0023] One or more technical solutions of the present invention have the following beneficial effects:

[0024] An efficient premixing device for dust-removing ash and sand and a using method provided by the present invention are provided. Nozzles are provided to fuse the cement ash dust to achieve dust reduction. A spiral plate is provided to form a vortex after the cement ash falls into the mortar to further prevent the cement ash dust. The whole adopts a non-powered form to replace the existing dust removal fan to remove the dust generated when adding cement ash, so that the cement within the required ratio participates in the preparation of the filling slurry in sufficient quantity, ensuring the preparation quality of the slurry. At the same time, the cement is pre-mixed and dissolved in the device in advance after the above steps, and then through the high-speed stirring of the mixing barrel, the problem of insufficient dissolution is avoided, further ensuring the preparation quality of the slurry.

[0025] In the present invention, the installation positions of multiple nozzles are arranged at annular intervals according to the inner wall size of the barrel body, which can ensure that the formed water mist can cover the entire circular cross-sectional area of the barrel body, so as to effectively mix with the cement ash when adding it, thereby forming cement slurry and reducing the dust problem when adding cement ash. Instead of the traditional method of setting a dust removal fan, the formed cement slurry, together with water and mortar, flows through the spiral plate by its own weight to achieve non-powered vortex flow, further reducing dust while improving the premixing effect.

[0026] By dividing into three feeding positions, cement ash is added from the top feed inlet, a nozzle for spraying water mist is provided on the side of the cylinder body, and a mortar feed inlet is provided below the nozzle for adding mortar. During use, the nozzle sprays water mist to first dissolve the cement powder into cement slurry, reducing the problem of dust generation easily caused by directly adding traditional cement ash. After the cement slurry falls into the mortar, the mortar flows downward along the spiral plate to form a vortex, and the formed vortex has a certain stirring effect, further eliminating the problem of dust generation easily caused by the dissolution of cement ash and mortar, and ensuring the full combination of cement and mortar, realizing the premixing and stirring of ash and sand. At the same time, this method has no power such as a motor to drive, and relies on the self-weight of cement, water, and mortar to flow downward along the spiral plate to form a vortex for mixing, which not only ensures the preparation effect of the filling slurry, but also replaces the dust reduction function of the dust removal fan, improves the mixing effect of the slurry, and reduces the production energy consumption and production cost of the slurry.

[0027] Compared with the existing filling slurry preparation technology, directly pouring cement ash into the mortar in the mixing barrel causes a large amount of cement ash to directly contact the ore pulp and cannot be quickly dissolved, resulting in the problem of insufficient dissolution and clotting of cement ash and mortar. By adding a premixing device between the cement ash silo and the mixing barrel, the cement ash, water, and mortar to be added to the mixing barrel are premixed through the premixing device, and then through the high-speed stirring of the mixing barrel, the problem of insufficient dissolution is avoided, and the quality of the slurry preparation is further ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The front view schematic diagram of a dust-eliminating ash-sand high-efficiency premixing device provided by Embodiment 1 of the present invention;

[0029] Figure 2 The top view schematic diagram of a dust-eliminating ash-sand high-efficiency premixing device provided by Embodiment 1 of the present invention;

[0030] Figure 3 The schematic diagram of a dust-eliminating ash-sand high-efficiency premixing device provided by Embodiment 1 of the present invention during use.

[0031] In the figure: 1, barrel body; 2, spiral plate; 3, feed inlet; 4, slurry inlet; 5, water inlet; 6, nozzle; 7, cement ash silo; 8, mixing barrel. DETAILED DESCRIPTION OF THE INVENTION

[0032] The present invention will be further described below in conjunction with the drawings and embodiments.

[0033] Embodiment 1

[0034] In a typical embodiment of the present invention, as Figure 1-2As described above, an efficient premixing device for dust and sand is proposed, which includes a barrel body 1. A feed inlet 3 is provided at the top of the barrel body 1, and a discharge outlet is provided at the bottom of the barrel body 1. A plurality of nozzles 6 are arranged annularly on the inner wall of the barrel body 1. The plurality of nozzles 6 are arranged below the feed inlet 3. A plurality of water inlets 5 are provided on the outer wall of the barrel body 1, and the plurality of water inlets 5 are respectively connected to the plurality of nozzles 6. A slurry inlet 4 is also provided on the barrel body 1, and the slurry inlet 4 is arranged below the water inlets 5. A spiral plate 2 is provided on the inner wall of the barrel body 1 from top to bottom. The upper starting point of the spiral plate 2 corresponds to the position of the slurry inlet 4, and the lower end point of the spiral plate 2 extends to the upper end of the discharge outlet.

[0035] Since the mixing barrel 8 in the prior art cannot be completely sealed, when adding cement ash, the cement dust is easily lifted and ejected from the gap of the barrel cover. To avoid dust ejection, usually a dust removal fan is provided above the barrel cover of the mixing barrel 8. When adding cement ash, the fan is started, and the cement ash suspended in the space inside the barrel is sucked away by the suction generated by the fan. The sucked-away cement ash will be collected and then added to the mixing barrel 8 again for mixing.

[0036] During this process, due to the poor matching between the suction of the dust removal fan and the dust raising situation of the cement ash, when the cement ash is added according to the standard ratio, if the suction of the fan is too large, in addition to the raised dust that needs to be sucked away, a part of the cement ash will also be lifted during addition and be sucked away without participating in the preparation of the filling slurry, affecting the standard of the slurry ratio and making the strength of the prepared slurry not meet the standard.

[0037] Moreover, during the process of adding cement ash, for the process of collecting the sucked-away cement ash and then adding it to the mixing barrel 8 again for mixing, not only does it increase the loss of cement ash, but also this entire cyclic operation increases the production energy consumption of the entire slurry and raises the production cost.

[0038] In this embodiment, a premixing device is added between the cement ash silo 7 and the mixing barrel 8. The premixing device premixes the cement ash, water, and mortar that need to be added to the mixing barrel 8, replacing the traditional method of directly adding the three materials to the mixing barrel 8, thereby solving the above problems.

[0039] Among them, the device body is arranged as a barrel body 1. The barrel body 1 is vertically arranged between the cement ash silo 7 and the mixing barrel 8. In this way, when the cement ash, water, and mortar are added into the barrel body 1 of the premixing device, they can flow and mix in a vortex manner by relying on their own gravity in cooperation with the spiral plate 2 arranged on the inner wall of the barrel body 1. By using a structure without power, the problem of dust raising during the addition and mixing of cement ash is reduced. Instead of the traditional method of setting a dust removal fan, while reducing industrial energy consumption, the problem that the suction of the dust removal fan cannot match the dust raising situation and cause the suction of excess cement ash and affect the mixing ratio of materials is avoided, ensuring the mixing effect of the slurry.

[0040] At the upper part of the barrel body 1, a feed inlet 3 is provided and connected to the cement ash bin 7. At the lower part of the barrel body 1, a discharge outlet is provided to convey the premixed material to the mixing barrel 8 for mixing. When connecting the feed inlet 3 and the cement ash bin 7, it is necessary to ensure the sealing condition at the connection to prevent cement ash from leaking. The discharge outlet is arranged at a position close to the inner wall of the mixing barrel 8 to convey the premixed slurry to the inner wall side of the mixing barrel 8, so that while not affecting the rotation and mixing of the mixing barrel 8, the mixing effect of the slurry can be improved.

[0041] And on the inner wall of the barrel body 1, a plurality of nozzles 6 are arranged at annular intervals. The plurality of nozzles 6 are arranged below the feed inlet 3. On the outer wall of the barrel body 1, a plurality of water inlets 5 are provided, and the plurality of water inlets 5 are respectively connected to the plurality of nozzles 6. When adding cement ash from the feed inlet 3, the nozzles 6 are located below the feed inlet 3, and water can be supplied to the plurality of nozzles 6. The plurality of nozzles 6 spray water to form water mist. The arrangement positions of the plurality of nozzles 6 are set at annular intervals according to the inner wall size of the barrel body 1, which can ensure that the formed water mist can cover the entire circular cross-sectional area of the barrel body 1, so as to effectively mix with the cement ash when adding it, thus forming cement slurry and reducing the dust problem when adding cement ash. Instead of the traditional way of setting a dust removal fan, the formed cement slurry, together with water and mortar, realizes non-powered vortex flow by relying on its own weight through the spiral plate 2, further reducing dust while improving the premixing effect.

[0042] A slurry inlet 4 is arranged below the water inlet 5 on the barrel body 1. A spiral plate 2 is provided on the inner wall of the barrel body 1 from top to bottom. The upper starting point of the spiral plate 2 corresponds to the position of the slurry inlet 4, and the lower end point of the spiral plate 2 extends to the upper end of the discharge outlet. The slurry inlet 4 of the mortar is arranged below the feed inlet 3 and the water inlet 5. At the same time, the upper starting point of the spiral plate 2 corresponds to the position of the slurry inlet 4. In this embodiment, the spiral plate 2 is welded to the inner side of the barrel wall and is spiral from top to bottom. The width dimension of the spiral plate can be set according to the actual situation to ensure the smooth flow of the slurry while forming a vortex flow of the slurry.

[0043] Since the mortar has a certain fluidity, such an arrangement can enable the mortar to come into contact with the spiral plate 2 in time after entering the barrel body 1 and fully drive the cement slurry formed by the cement ash and the water sprayed by the nozzles 6 and the water to flow in a vortex through the spiral plate 2, thereby realizing the efficient mixing of the slurry. The mixed slurry flows through the discharge outlet through the lower part of the spiral plate 2 and enters the mixing barrel 8 for mixing.

[0044] It can be seen that by dividing the three feeding positions, the cement ash is added from the top feeding port 3, a nozzle 6 for spraying water mist is provided on the side of the barrel body 1, and a mortar feeding port 3 is provided below the nozzle 6 for adding mortar. During use, the nozzle 6 sprays water mist to first dissolve the cement powder in water to form cement slurry, reducing the problem of dust generation easily caused by direct addition of traditional cement ash. After the cement slurry falls into the mortar, the mortar flows downward along the spiral plate 2 to form a vortex, and the formed vortex has a certain stirring effect, further eliminating the problem of dust generation easily caused during the dissolution of cement ash and mortar, and ensuring the full combination of cement and mortar. The premixing and stirring of cement ash, water, and mortar are realized. At the same time, this method has no power such as a motor to drive, and relies on the self-weight of cement, water, and mortar to flow downward along the spiral plate 2 to form a vortex for mixing, which not only ensures the preparation effect of the filling body but also replaces the dust reduction function of the dust removal fan, improves the mixing effect of the slurry, and reduces the production energy consumption and production cost of the slurry.

[0045] Moreover, compared with the existing filling slurry preparation technology, directly pouring the cement ash into the ore slurry in the stirring barrel 8 causes a large amount of cement ash to directly contact the ore slurry and cannot be quickly dissolved, resulting in the problem of insufficient dissolution and agglomeration of cement ash and ore slurry. In this embodiment, the cement ash is premixed and fused in the device in advance after the above steps, and then through the high-speed stirring of the stirring barrel 8, the problem of insufficient dissolution is avoided, and the quality of the slurry preparation is further ensured.

[0046] Furthermore, the upper part of the barrel body 1 is a hollow cylindrical structure, the lower part of the barrel body 1 is a conical structure, and the diameter of the discharge port at the lower part of the barrel body 1 is smaller than the diameter of the barrel body 1.

[0047] Furthermore, the axial length of the conical structure at the lower part of the barrel body 1 is smaller than the axial length of the hollow cylindrical structure at the upper part of the barrel body 1.

[0048] In this embodiment, the upper part of the barrel body 1 being a hollow cylindrical structure can facilitate the vortex flow premixing of the slurry in the barrel body 1 through the spiral plate 2, providing sufficient travel for the premixing of the slurry and ensuring the premixing effect of the vortex flow. The lower part of the barrel body 1 being a conical structure and the diameter of the discharge port being smaller than the diameter of the barrel body 1 can achieve the gathering effect on the premixed slurry, increasing the mixing effect of the slurry and facilitating the flow of the gathered slurry into the stirring barrel 8. In other embodiments of the present invention, the height ratio of the cylindrical part and the conical part of the barrel body 1 can be adaptively designed according to the flow rate requirements of the slurry.

[0049] Furthermore, the feed inlet 3 is detachably connected to the top of the barrel body 1. With such a setting, the feed inlet 3 has a certain height and can act as the lid structure on the upper part of the barrel body 1. The detachable connection facilitates the disassembly of the feed inlet 3 during maintenance for inspecting the interior of the barrel. In this embodiment, the periphery of the feed inlet 3 and the top of the barrel body 1 can be connected by a plurality of bolts, achieving detachable connection while maintaining the stability and tightness of the connection.

[0050] Furthermore, the diameter of the feed inlet 3 is smaller than that of the barrel body 1. With such a setting, it is convenient to set a detachable connection structure between the feed inlet 3 and the top of the barrel body 1 for easy disassembly, and at the same time, it prevents dust from flying out of the feed inlet 3 during the addition of cement ash.

[0051] Furthermore, a top cover is provided at the top of the feed inlet 3. In this embodiment, a top cover is provided at the top of the feed inlet 3. The top cover can be opened and closed by rotating the switch. When the device is in use, the top cover is opened to dock with the feed inlet 3, and when not in use, the top cover is closed to protect the internal structure of the barrel body 1.

[0052] Furthermore, the plurality of nozzles 6 are evenly distributed in a ring on the inner wall of the barrel body 1. In this embodiment, four nozzles 6 are provided. The installation positions are evenly distributed at intervals in a ring according to the inner wall size of the barrel body 1, which can ensure that the formed water mist can cover the entire circular cross-sectional area of the barrel body 1, so as to effectively mix with the cement ash during the addition of cement ash to form cement slurry.

[0053] Furthermore, the height of the starting point at the upper part of the spiral plate 2 is equal to or less than the height of the lower edge of the slurry inlet 4. Since the mortar has a certain fluidity, with such a setting, the mortar can come into contact with the spiral plate 2 in time after entering the barrel body 1 and fully drive the vortex flow of the cement slurry formed by the cement ash and the water sprayed by the nozzles 6 as well as the water through the spiral plate 2, thus realizing the efficient mixing of the slurry.

[0054] Furthermore, the axis of the slurry inlet 4 is tangentially arranged with the circular outer wall of the barrel body 1. With such a setting, after the mortar in the slurry inlet 4 enters the barrel body 1, setting the flow direction of the mortar entering the barrel body 1 tangentially to the circular outer wall of the barrel body 1 can ensure that the mortar directly rotates and flows along the spiral plate 2, thus ensuring the fluidity of the slurry without power.

[0055] In the second aspect of the present invention, a method for using a dust-eliminating and sand-efficient premixing device is provided, including:

[0056] Dock the feed inlet 3 with the cement silo delivery port, and set the discharge port facing the inside of the mixing barrel 8;

[0057] Add cement ash from the top feed inlet 3, supply water to the plurality of nozzles 6, and add mortar through the mortar feed inlet 3 provided below the nozzles 6;

[0058] Multiple nozzles 6 spray water mist simultaneously to dissolve cement ash into water to form cement slurry. After the cement slurry falls into the mortar, the cement slurry, water, and mortar flow downward along the spiral plate 2 by their own weights to form a vortex for mixing to form a slurry;

[0059] The slurry flows into the mixing barrel 8 through the discharge port for mixing.

[0060] As Figure 3 shown, three fluids of cement, mortar, and clean water are added into the premixing device simultaneously. The water mist first dissolves the cement powder into water. After the cement slurry falls into the mortar, the mortar flows downward along the spiral plate to form a vortex, which not only eliminates cement dust but also ensures the full combination of cement and mortar. The formed vortex is similar to the stirring effect, realizing the premixing and stirring of ash and sand. This design has no power drive such as a motor, which not only ensures the preparation effect of the filling body but also replaces the dust reduction function of the dust removal fan, saving energy and reducing consumption.

[0061] An efficient dust-removing ash-sand premixing device and its use method provided by the present invention are provided with nozzles to dissolve the dust of cement ash for dust reduction, and a spiral plate is provided to form a vortex after the cement ash falls into the mortar to further prevent the dust of cement ash. The whole adopts a non-powered form to replace the existing dust removal fan to remove the dust generated when adding cement ash, so that the cement within the required ratio participates in the preparation of the filling slurry in sufficient quantity, ensuring the preparation quality of the slurry.

[0062] Although the specific implementation manners of the present invention are described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present invention.

Claims

1. An efficient premixing device for dust and sand, characterized in that, It includes a cylinder body. A feed inlet is provided at the top of the cylinder body, and a discharge outlet is provided at the bottom of the cylinder body. A plurality of nozzles are annularly arranged on the inner wall of the cylinder body. The plurality of nozzles are arranged below the feed inlet. A plurality of water inlets are provided on the outer wall of the cylinder body, and the plurality of water inlets are respectively connected to the plurality of nozzles. A slurry inlet is further provided on the cylinder body, and the slurry inlet is arranged below the water inlets. A spiral plate is provided on the inner wall of the cylinder body from top to bottom. The upper starting point of the spiral plate corresponds to the position of the slurry inlet, and the lower end point of the spiral plate extends to the upper end of the discharge outlet.

2. The high-efficiency premixing device for dust and sand as described in claim 1, characterized in that, The upper part of the cylinder body is a hollow cylindrical structure, and the lower part of the cylinder body is a conical structure. The diameter of the discharge outlet at the lower part of the cylinder body is smaller than the diameter of the cylinder body.

3. The high-efficiency premixing device for removing dust and sand according to claim 2, characterized in that, The axial length of the conical structure at the lower part of the cylinder body is smaller than the axial length of the hollow cylindrical structure at the upper part of the cylinder body.

4. The high-efficiency premixing device for dust and sand as described in claim 1, characterized in that, The feed inlet and the top of the cylinder body are detachably connected.

5. The high-efficiency premixing device for dust and sand as claimed in claim 1, wherein The diameter of the feed inlet is smaller than the diameter of the cylinder body.

6. The high-efficiency premixing device for dedusting dust and sand according to claim 1, characterized in that A top cover is provided at the top of the feed inlet.

7. An efficient premixing device for dust and sand, as described in claim 1, characterized in that, The plurality of nozzles are annularly and evenly distributed on the inner wall of the cylinder body.

8. An efficient premixing device for dust and sand, as described in claim 1, characterized in that The height of the upper starting point of the spiral plate is equal to or less than the height of the lower edge of the slurry inlet.

9. The high-efficiency premixing device for dust and sand as described in claim 1, characterized in that, The axis of the slurry inlet is tangentially arranged with the circular outer wall of the cylinder body.

10. The method of using an efficient premixing device for dust and sand removal according to any one of claims 1-9, characterized in that, It includes: Dock the feed inlet with the conveying port of the cement silo, and set the discharge outlet towards the inside of the mixing barrel; Add cement ash from the top feed inlet, supply water to the plurality of nozzles, and a mortar feed inlet is provided below the nozzles to add mortar; The plurality of nozzles spray water mist simultaneously to dissolve the cement ash into cement slurry. After the cement slurry falls into the mortar, the cement slurry, water, and mortar flow downward along the spiral plate from top to bottom to form a vortex for mixing to form a slurry; The slurry flows into the mixing barrel through the discharge outlet for stirring.

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