Superfine powder and light material mixer device and control method

Abstract

The invention relates to a superfine powder and light material mixer device and a control method. The lower end of the side part of a mixing tank is communicated with one end of a chute, the other end of the chute is communicated with a material box, a plurality of openings are formed in the bottom of the mixing tank and are connected with corresponding control valves through pipelines, and the material box is used for loading mixed materials in the mixing tank; a dust collecting opening is formed in the material box cover and is connected with a corresponding control valve; an upper impeller, a lower impeller and a scraping plate are arranged in the mixing tank and are respectively driven by corresponding variable frequency motors, and the variable frequency motors are driven by a frequency converter. The mixing tank cover door device has the advantages that a plurality of openings are formed in the mixing tank cover door device and are used for feeding various mixing mesons into the mixing tank, so that the mixing process is ensured; and through and no input limiting condition signals are arranged at a plurality of openings of the mixing machine, so that the input process and input quantity of materials with different characteristics can be flexibly processed, and the controllability of the mixing process is ensured.

Description

Technical Field

[0001] The invention relates to the field of material mixing process and control technology in the refractory industry, and in particular to an ultrafine powder and light material mixer device and a control method. Background Art

[0002] The existing material mixing technology in the refractory industry generally uses ordinary powder mixing and processing equipment, including various stirrers and mixers to mix and process the materials that need to be mixed. As the refractory industry requires refractory bricks to have a long life and be resistant to erosion, refractory bricks formed by pressing and molding ordinary powders after mixing are difficult to meet the requirements of the steel industry for refractory materials. The successful development of lightweight and ultrafine powder materials in the refractory industry can solve the steel industry's requirements for long-life refractory bricks, but the existing equipment is difficult to meet the requirements for uniform and efficient mixing of ultrafine powder materials used to produce high-quality refractory bricks.

[0003] In the prior art, the patent announcement number is CN211246283U, and the patent name is "A mixing and stirring device for the production of refractory materials". It points out that this patent "provides a technical solution: a mixing and stirring device for the production of refractory materials, including a mixing tank 1, a stirring shaft 2, a stirring blade 3, a scraper 4, a guide plate 5, a baffle 6, a support plate 7, a feeding hole 8, a fixed column 9, a feeding mechanism 10, a storage hopper 11 and a toothed disc 12. The stirring shaft 2 is rotatably installed in the middle of the upper end of the mixing tank 1, and the stirring blade 3 is welded and fixed on the outer side of the stirring shaft 2, and the scraper 4 is integrally arranged at the bottom end of the stirring shaft 2. The lower end of the left surface of the mixing tank 1 is provided with a guide plate 5, and the inside of the guide plate 5 is provided with a baffle 6. The support plate 7 is fixed to the upper end of the side wall of the mixing tank 1 by welding, and the upper surface of the mixing tank 1 is opened at equal angles. A feeding hole 8 is provided, and a fixed column 9 fixed on the mixing tank 1 is arranged on the outside of the feeding hole 8, a feeding mechanism 10 is installed on the outside of the fixed column 9 through a bearing, and a toothed disc 12 is arranged on the outside of the feeding mechanism 10, and a storage hopper 11 is located above the feeding mechanism 10, and the feeding mechanism 10 includes a feeding box 1001, a charging cavity 1002, a rubber pad 1003 and a closed plate 1004, a charging cavity 1002 is reserved in the middle of the feeding box 1001, and the upper and lower surfaces of the feeding box 1001 are both pasted and fixed with rubber pads 1003, and the outer surface of the rubber pad 1003 is pasted and fixed with a closed plate 1004". The patented mixing equipment has only one stirring blade driven by a motor, and there is no inlet for various auxiliary materials such as additives and water, so it cannot carry out complex mixing of multiple materials and additives, and the mixing efficiency of light and ultrafine powders is low. Summary of the invention

[0004] The purpose of the present invention is to provide a superfine powder and light material mixer device and a control method, which improves the mixing efficiency of light superfine powder materials, strongly suspends and stirs the mixed materials, and improves the dispersibility and uniformity.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A superfine powder and light material mixer device, comprising a mixing tank, the mixing tank is arranged on a bracket, the lower end of the side of the mixing tank is connected to one end of a chute, the other end of the chute is connected to a material box, a discharge water outlet is arranged at the bottom of the mixing tank, the discharge water outlet and the main raw material input port, the auxiliary material input port, the binder input port, the washing water injection port, the steam dust collection port, the dust collection return port, the air exhaust filter and the dust collection port, the additive input port, the additional water injection port arranged on the mixing tank cover are connected to the corresponding control valve through pipelines, the material box is used to load the mixed materials in the mixing tank, the material box cover is provided with a dust collection port, and the dust collection port is connected to the corresponding control valve;

[0007] An upper impeller, a lower impeller and a scraper plate are arranged in the mixing tank. The upper impeller, the lower impeller and the scraper plate are driven by corresponding variable frequency motors respectively, and the variable frequency motors are driven by a frequency converter.

[0008] A discharge valve is arranged in the chute, and the discharge valve comprises a cylinder body, a cylinder rod and a push head. The cylinder body is fixed on the discharge valve housing, and the cylinder rod is used to drive the push head to extend and retract. When the bottom of the push head rests on the mixing tank, the discharge valve is closed, and the mixed material in the mixing tank is not discharged; when the push head is retracted, the discharge valve is opened, and the mixed material in the mixing tank can be discharged into the material box through the chute below the push head.

[0009] The main raw material input port, auxiliary material input port, binder input port, washing water injection port, additive input port and additional water injection port are respectively connected to the corresponding raw material storage bins through hoses, and provide the required mixed raw materials and additives for the mixing tank. The discharge water outlet is connected to the external water treatment interface, and the dust collection return port, air emission filter and dust collection port, and dust collection port are respectively connected to the corresponding collection ports, and are discharged after filtering and dust removal.

[0010] The side wall of the chute is provided with a vibrator, and a soft connection is adopted between the chute and the material box.

[0011] A cylinder is arranged on the material box cover, and the cylinder is used to drive the parallel four-bar linkage mechanism to open or close the material box door. A limit switch is arranged on the material box cover to detect the signal that the material box door is opened or closed.

[0012] The upper impeller is a high-speed stirring blade, and the lower impeller is a low-speed stirring blade. The high-speed stirring blade and the low-speed stirring blade do not contact each other. The upper impeller is fixedly connected to the inner shaft of the guide tube, and the lower impeller is fixedly connected to the outer shaft of the guide tube. The upper impeller is used to accelerate the suspension, refinement, and diffusion of materials in the mixing tank and increase the contact surface of the materials. The lower impeller is used to stir the materials around the bottom of the mixing tank to participate in the mixing. The scraper plate is used to push the light materials and ultrafine powders that are suspended on the top of the tank body and do not participate in the material mixing and are thrown up by the upper and lower impellers in the mixing tank back into the material mixing.

[0013] The mixing tank cover plate and the control valve are respectively provided with limit switches for detecting switch in-position signals.

[0014] The discharge valve is provided with a limit switch to detect the signal that the cylinder rod has been extended and retracted into position.

[0015] A control method for a superfine powder and light material mixer is implemented based on PLC / DCS. The content is as follows:

[0016] 1) Initial conditions for adding mixed materials into the mixing tank

[0017] The mixing tank cover is closed in place, the discharge valve is closed in place, and the compressed air is passed. The compressed air is used to provide air source for the cylinder;

[0018] 2) Mixing tank mixing start conditions

[0019] Corresponding control valves are set at the water injection port, water discharge port, steam dust collection port, dust collection return port, air discharge filter dust collection port, and additive injection port. Corresponding control valves are set at the main raw material input port, auxiliary raw material input port, and binder input port. The input and mixing process can be controlled by the limit switch status of the control valve "on" and "off", and the "on" signal becomes invalid after the set delay time, which is used to limit the input amount of the mixed material;

[0020] The upper impeller inverter, lower impeller inverter and scraper inverter have been confirmed to be in the stopped state, the material box cover is in the closed state, and the dust collection port is in the open state;

[0021] 3) Mixing tank mixed start

[0022] Start the upper impeller, the lower impeller, the scraper plate, and the vibrator. The upper impeller and the lower impeller rotate in opposite directions. The upper impeller rotates at a high speed, and the lower impeller rotates at a low speed.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The mixing tank cover door device is provided with numerous openings for feeding various mixing media into the mixing tank. Among them, the two-position two-way solenoid valve SV is used to control the feeding of the main raw material feeding port and the auxiliary raw material feeding port. The two raw material feeding ports are also provided with solenoid valve opening and closing limit switches LS to confirm their opening and closing, so as to achieve quantitative feeding of the main raw materials and auxiliary raw materials that need to be mixed. The opening and closing limit LD of the binder feeding port (with a rotary joint) is used to quantitatively and evenly feed the binder for the mixed materials into the mixing tank. The washing water injection port is used to inject washing water to ensure that the mixing environment in the mixing tank meets the requirements. The two-position two-way solenoid water valve SV provided at the additive injection port is used to control the uniform and quantitative injection of additives into the mixing tank body to ensure the mixing process.

[0025] 2. The total power of the drive motor reducer of the high-speed stirring blade, the drive motor reducer of the low-speed stirring blade, and the drive motor reducer of the top scraper is nearly 300kW. It is driven by a variable frequency motor and a frequency converter. The starting, middle, and ending speeds can be set by the frequency converter. The speed and time curve of each mixing process can also be set. The speed suitable for the mixed material to be thrown up can accelerate the suspension, refinement, and diffusion of the material, increase the contact area of ​​the material, and facilitate the mixing of different materials. The mixing time can be flexibly and widely controlled, the mixing speed is fast, the mixing time is saved, the mixing is uniform, the mixing efficiency is improved, and the energy consumption is reduced;

[0026] 3. While setting the input restriction signals of "pass" and "no" for many openings of the mixer, the "delay" and "stop" program restriction conditions of the entrance work are also set, which can flexibly handle the input process and input amount of materials with different characteristics, ensure the controllability of the mixing process, make the mixer more flexible to adapt to the feeding requirements of different mixing processes, and improve the mixing effect;

[0027] 4. The mixer device is used to make the mixed material particles complete, diffusible and uniform. The refractory bricks pressed and fired with the mixed material have a long life of erosion resistance. During the mixing operation, the operator can adjust the mixing time, high-speed impeller / low-speed impeller, and scraping speed parameters according to the characteristics of the mixed material, auxiliary materials and binder, so as to achieve good program extension and scalability;

[0028] 5. The open and close limit of the mixture discharge valve, the closed limit of the discharge valve cover plate, and the closed limit of the discharge valve seat plate are used to detect the status information of the discharge valve to ensure the safe operation of the discharge process;

[0029] 6. The gas source of the cylinder comes from the gas storage tank, which ensures the stability of the gas source. The pipeline pressure monitoring pressure switch is set to ensure that an alarm signal is issued when the pipeline pressure exceeds the set range. Mufflers are installed at the exhaust ports of each solenoid valve in the gas circuit to ensure the personal safety of employees;

[0030] 7. The upper impeller and the lower impeller adopt high-speed stirring and low-speed stirring respectively, and the rotation directions are opposite, which can make the materials in the mixing tank thrown up, collided and rolled, and make the mixed material flow form a strong countercurrent when mixing in the mixing tank body, so that the mixed material can be evenly mixed in a short time, and the mixing effect is good. Under certain conditions, it can also play the coveted granulation effect; the scraper plate can be used to remove the ultra-fine powder that is thrown up at high speed and suspended on the top of the mixing tank body and does not participate in the material mixing, which seriously affects the mixing efficiency. The paddle of the upper scraper plate can make the top suspended material return to the material mixing, thereby improving the mixing efficiency and mixing uniformity;

[0031] 8. When the high-speed stirring device, low-speed stirring device and scraping device are confirmed to be in the stopped state, the material box cover is in the closed state and the dust storage port valve is in the open state, the discharge valve device has the restricted conditions to open the discharge valve and discharge the mixed material into the material box, thereby ensuring the safe operation of the discharge. The air vibrator arranged at the bottom of the discharge valve chute assists in the discharge, which can prevent the discharge chute from being blocked and piling up. The solenoid valve arranged at the bottom of the discharge chute and the opening and closing door device controlled by the parallel four-bar linkage mechanism ensure the opening and closing of the material box softly connected to the discharge chute. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the process structure of a superfine powder and light material mixer.

[0033] Figure 2 It is a schematic diagram of the working process of the ultrafine powder and light material mixer.

[0034] In the figure: 1-tank closing limit LS 2-cover closing limit LS 3-two-position two-way electromagnetic valve SV for main raw material input port 4-auxiliary material input port 5-main raw material input port 6-scraper device variable frequency motor reducer 7-additive input port 8-adhesive input port 9-adhesive input port electromagnetic pneumatic butterfly valve 10-wash water injection port 11-air discharge filter and dust collection port 12-air discharge filter and dust collection port two-position two-way electromagnetic valve SV 13-contactless proximity switch 14-steam dust collection port 15-steam dust collection port electromagnetic pneumatic butterfly valve 16-dust collection return port 17-addition water injection port 18-addition water injection port two-position two-way electromagnetic water valve 19-mixing tank upper inlet and outlet water pipes 20-mixing tank upper inlet and outlet water pipes two-position two-way electromagnetic water valve 21-thermocouple TIC 22-exhaust valve cover plate closing limit LS 23-exhaust valve seat plate closing limit LS 24-exhaust valve closing limit LD 25-exhaust valve opening limit LD 26-two-position four-way solenoid valve27-dust collection port28-dust collection port electromagnetic pneumatic butterfly valve29-material box30-discharge valve and material box soft connection31-material box opening and closing door four-link mechanism driving cylinder32-air vibrator33-pressure switch34-air source treatment original (filter pressure reducing valve)35-upper impeller drive frequency conversion motor reducer36-lower impeller drive frequency conversion motor reducer37-scraper plate38-upper impeller and screw (or propeller) type guide cylinder39-lower impeller stirring paddle40-mixing tank lower drain port41-mixing tank lower drain port battery water valve42-lower impeller rotation detection switch43-upper impeller rotation detection switch44-check door closing limit LS50-cylinder body51-cylinder lever52-push head60-upper impeller driving pulley61-lower impeller driving pulley. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0036] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0037] [Example 1]

[0038] See Figure 1A superfine powder and light material mixer device, including a split trapezoidal arc mixing tank cover closing limit switch LS1, an upper impeller driving a variable frequency motor reducer 35, an upper impeller and a screw (or propeller) type guide tube 38, a lower impeller driving a variable frequency motor reducer 36, a scraper variable frequency motor reducer 6, a mixed material discharge valve opening and closing limit LD 2425, a discharge valve cover plate closing limit LS22, a discharge valve seat plate closing limit LS23, a tank body thermocouple TIC 21, and a pneumatic system. An outer shaft and an inner shaft located in the outer shaft are vertically rotatably installed on the guide tube, and the outer shaft and the inner shaft pass through the bottom of the mixing tank. The upper impeller is fixedly connected to the inner shaft at the lower end of the guide tube, and the lower impeller is fixedly connected to the outer shaft of the guide tube. The material box cover door device is provided with a two-position two-way electromagnetic valve SV at the main raw material input port 3 controls the main raw material input port 5 and the auxiliary raw material input port 4, and both raw material input ports are provided with electromagnetic valve opening and closing limit switches LS to confirm their opening and closing, the binder input port 8 and the binder input port electromagnetic pneumatic butterfly valve 9 (with a rotary joint), the washing water injection port 10, the additive injection port 7 controlled by the two-position two-way electromagnetic water valve SV 15, the air discharge filter and the dust collecting port 11, the dust collecting discharge port is controlled by the electromagnetic valve SV 12 to open and close, the air dust collecting port 14 is opened and closed by the limit switch LS15, the additional water injection port 17 is controlled by the electromagnetic water valve SV 18 to open and close, the upper part of the mixing tank is provided with a two-position two-way electromagnetic water valve SV 20 to control the opening and closing of the water inlet and outlet pipes 19 at the upper part of the mixing tank, and the lower part of the mixing tank is also provided with a two-position two-way electromagnetic water valve SV41 to control the water discharge port 40 at the lower part of the mixing tank.

[0039] The mixing tank cover opening and closing limit switch LS1 is used to confirm the tank closing state, and the cover opening and closing limit switch LS2 is used to confirm the cover closing state. Both are necessary conditions for the mixing tank to start mixing materials. The upper impeller drives the variable frequency motor reducer 35 to drive the high-speed upper impeller and the screw (or propeller) type guide tube 38 to rotate through the upper impeller active pulley 60. An upper impeller rotation detection switch 43 is provided to detect whether the upper impeller is rotating. The upper impeller can select the starting rotation, middle and end speeds of the impeller according to the characteristics of the mixed material, and can also set the rotation speed and time change curve of each process, set the shear speed of the mixed material to be thrown up, and the mixing parameters can accelerate the suspension, refinement and expansion of the material. The lower impeller drives the variable frequency motor reducer 36 to drive the lower impeller stirring blade 39 through the lower impeller active pulley 61, which stirs the materials around the bottom mixing tank to participate in the mixing process. The starting rotation speed, middle and end speeds of the impeller can be set according to the characteristics of the mixed materials, and the rotation speed and time variation curve of each process can also be set; the upper scraping device variable frequency motor reducer 6 pushes the light materials and ultra-fine powder materials that are thrown up by the upper and lower impellers in the mixing tank and suspended on the top of the tank body without participating in the material mixing and seriously affecting the mixing efficiency back into the material mixing through the scraping plate 37, thereby improving the mixing efficiency and the uniformity of the mixing. The rotation speed of the scraper plate 37 should be set according to the particle size, bulk density and other properties of the material. Too fast or too slow is not conducive to the return of the suspended material to the mixed state; the mixture discharge valve opening and closing limit LD 24, 25, the discharge valve cover plate closing limit LS 22, and the discharge valve seat plate closing limit LS23 are the control signals of the discharge valve part. These signals are mainly used to control the discharge valve to discharge the mixed materials in the mixing tank into the material box 29. In the program, they are all in a closed state, which is also one of the necessary conditions for the mixer to start working. The air vibrator 32 at the bottom of the discharge device chute is used to help the discharge of materials smoothly and prevent the blockage of fine powder expansion materials.

[0040] The air source part of the pneumatic system and control includes the air source processing element (filter pressure reducing valve) 34 and the pipeline pressure monitoring pressure switch 33, as well as the pneumatic control and supply of each pneumatic actuator cylinder and each reversing and opening and closing control valve. The pipeline pressure monitoring switch 33 will send out an alarm signal when the pressure exceeds the set pressure.

[0041] The material box cover door device is provided with a two-position two-way solenoid valve SV 3 to control the main raw material input port 5 and the auxiliary raw material input port 4. The two input ports are provided with an electromagnetic valve opening and closing limit switch LS to confirm their opening and closing, and the main raw material and auxiliary raw material to be mixed are quantitatively added into the mixing tank according to the mixing process requirements. The binder input port 8 adopts an electromagnetic pneumatic butterfly valve SV 9 (with a rotary joint) to quantitatively and evenly add the binder for the mixed material into the mixing tank. The washing water injection port 10 injects washing water according to the process requirements to ensure that the mixing environment in the tank meets the requirements. The additive injection port 7 controlled by the two-position two-way electromagnetic water valve SV 15 controls the uniform and quantitative injection of additives into the mixed material in the tank body according to the process formula to ensure the mixing process.

[0042] The air emission filter and the dust collecting port 11 are controlled by the two-position two-way solenoid valve SV12. The dust collecting emission port is opened and closed by the solenoid valve according to the requirements of the mixing process. The opening and closing is confirmed by the limit switch LS carried by the valve itself. The exhaust gas filtered by the filter meets the emission standards. A manually controlled stop valve is also provided on the emission pipeline for use when the electric valve is repaired and replaced. The steam dust collecting port 14 is controlled by the two-position two-way solenoid valve SV15. Its opening and closing is opened and closed by the valve's own limit switch LS according to the needs of the process production. An emission filter that meets environmental protection standards is also provided on the steam dust collecting port pipeline.

[0043] The water addition inlet 17 provided on the mixing tank cover is opened and closed by a two-position two-way electromagnetic water valve SV 18 according to the mixing process requirements; the two-position two-way electromagnetic water valve SV 20 provided on the upper part of the mixing tank controls the opening and closing of the water inlet and outlet pipes 19 on the upper part of the mixing tank, and the two-position two-way electromagnetic water valve SV 41 provided on the lower part of the mixing tank controls the opening and closing of the water discharge port 40 on the lower part of the mixing tank, both of which are used to add water or discharge water according to the mixing process requirements.

[0044] [Example 2]

[0045] In this embodiment, a superfine powder and light material mixer device and a control method are the same as those in Embodiment 1, and a control method for the superfine powder and light material mixer is added thereto.

[0046] See Figure 2 , mixing tank cover closed 2, drain valve closed 24, drain valve cover plate closed 22, drain valve seat plate closed 23, compressed air is the basic necessary signal for the mixer to start adding mixed materials and various auxiliary materials into the mixing tank.

[0047] The basic necessary signals for the mixing tank to start mixing are: the main raw material inlet 5, the auxiliary raw material inlet 4, and the binder inlet 8 are all set with "on" signals. At the same time, the working conditions of these main raw material inlets are "completion" of "delay 0 to 999s", which can flexibly respond to the input process and input amount of materials with different characteristics, making the mixer more flexible to adapt to the feeding requirements of different mixing processes and making the overall material mixing effect better.

[0048] The basic necessary signals for the mixing tank to start mixing also include the cooling water pipes (the mixing tank cover is provided with a water addition injection port 17 controlled by a two-position two-way electromagnetic water valve SV18, the upper part of the mixing tank is provided with an inlet and outlet water pipe 19 controlled by a two-position two-way electromagnetic water valve SV20, and the lower part of the mixing tank is also provided with a discharge water port 40 controlled by a two-position two-way electromagnetic water valve SV41. The input and shutoff of these cooling water are also controlled by the measured temperature of the thermocouple TIC B 21 in the tank), as well as the steam dust collection port 14, the dust collection return port 16, the air exhaust filter dust collection port 11, the additive injection port 7, etc., which are all provided with "on" and "off" as conditional signals for feeding, to ensure the input of these functions during the mixing process and the controllability of the mixing process.

[0049] After the mixing tank starts to start and meets various auxiliary conditions, the high-speed stirring device, low-speed stirring device and scraping device are started to mix the materials. This is the main mixing drive part of the mixer. The entire mixing process is based on the characteristics of each mixed material, such as material particle size, material density, mixing temperature, and the input time of the mixing medium to achieve quantity control.

[0050] When the high-speed stirring device, the low-speed stirring device and the scraping device are confirmed to be in the stopped state, the material box cover is in the closed state, and the dust storage port valve 28 is in the open state, the discharge valve device has the conditions to open the discharge valve and start to discharge the mixed material into the material box. In order to ensure the smooth operation of the discharge, an air vibrator 32 is arranged at the bottom of the discharge valve chute to assist the discharge, and a two-position four-way solenoid valve 26 and a cylinder 31 are arranged at the bottom of the discharge chute to drive a parallel four-bar linkage mechanism to control the opening and closing door device, which is used to open and close the material box softly connected to the discharge chute, and the material box 29 is connected to the discharge device by a soft connection 30.

Claims

1. A superfine powder and light material mixer device, characterized in that: It includes a mixing tank, which is arranged on a bracket, the lower end of the side of the mixing tank is connected to one end of the chute, and the other end of the chute is connected to the material box. A discharge water outlet is arranged at the bottom of the mixing tank, and the discharge water outlet and the main raw material input port, auxiliary material input port, adhesive input port, washing water injection port, steam dust collection port, dust collection return port, air exhaust filter and dust collection port, additive input port, and additional water injection port arranged on the mixing tank cover are connected to corresponding control valves through pipelines. The material box is used to load the mixed materials in the mixing tank, and a dust collection port is arranged on the material box cover, and the dust collection port is connected to the corresponding control valve; An upper impeller, a lower impeller and a scraper plate are arranged in the mixing tank. The upper impeller, the lower impeller and the scraper plate are driven by corresponding variable frequency motors respectively, and the variable frequency motors are driven by a frequency converter.

2. The ultrafine powder and light material mixer device according to claim 1, characterized in that: A discharge valve is arranged in the chute, and the discharge valve comprises a cylinder body, a cylinder rod and a push head. The cylinder body is fixed on the discharge valve housing, and the cylinder rod is used to drive the push head to extend and retract. When the bottom of the push head rests on the mixing tank, the discharge valve is closed and the mixed material in the mixing tank is not discharged; when the push head is retracted, the discharge valve is opened and the mixed material in the mixing tank can be discharged into the material box through the chute below the push head.

3. The ultrafine powder and light material mixer device according to claim 1, characterized in that: The main raw material input port, auxiliary material input port, binder input port, washing water injection port, additive input port and additional water injection port are respectively connected to the corresponding raw material storage bins through hoses, and provide the required mixed raw materials and additives for the mixing tank. The discharge water outlet is connected to the external water treatment interface, and the dust collection return port, air emission filter and dust collection port, and dust collection port are respectively connected to the corresponding collection ports, and are discharged after filtering and dust removal.

4. The ultrafine powder and light material mixer device according to claim 2, characterized in that: The side wall of the chute is provided with a rapper, and a soft connection is adopted between the chute and the material box.

5. The ultrafine powder and light material mixer device according to claim 4, characterized in that: The material box cover is provided with a cylinder, which is used to drive the parallel four-bar linkage mechanism to open or close the material box door. The material box cover is provided with a limit switch, which is used to detect the signal that the material box door is opened and closed.

6. The ultrafine powder and light material mixer device according to claim 1, characterized in that: The upper impeller is a high-speed stirring blade, and the lower impeller is a low-speed stirring blade. The high-speed stirring blade and the low-speed stirring blade do not contact each other. The upper impeller is fixedly connected to the inner shaft of the guide tube, and the lower impeller is fixedly connected to the outer shaft of the guide tube. The upper impeller is used to accelerate the suspension, refinement, and diffusion of materials in the mixing tank and increase the contact surface of the materials. The lower impeller is used to stir the materials around the bottom of the mixing tank to participate in the mixing. The scraper plate is used to push the light materials and ultrafine powders that are thrown up by the upper and lower impellers in the mixing tank and suspended on the top of the tank body and do not participate in the material mixing back into the material mixing.

7. The ultrafine powder and light material mixer device according to claim 1, characterized in that: The mixing tank cover plate and the control valve are respectively provided with limit switches for detecting switch in-position signals.

8. The ultrafine powder and light material mixer device according to claim 2, characterized in that: The discharge valve is provided with a limit switch to detect the signal that the cylinder rod has been extended and retracted into position.

9. A control method for a superfine powder and light material mixer is implemented according to the device according to any one of claims 1 to 8, which is implemented based on PLC / DCS, characterized in that: The content is as follows: 1) Initial conditions for adding mixed materials into the mixing tank The mixing tank cover is closed in place, the discharge valve is closed in place, and the compressed air is passed. The compressed air is used to provide air source for the cylinder; 2) Mixing tank mixing start conditions Corresponding control valves are set at the water injection port, water discharge port, steam dust collection port, dust collection return port, air discharge filter dust collection port, and additive injection port. Corresponding control valves are set at the main raw material input port, auxiliary raw material input port, and binder input port. The input and mixing process can be controlled by the limit switch status of the control valve "on" and "off", and the "on" signal becomes invalid after the set delay time, which is used to limit the input amount of the mixed material; The upper impeller inverter, lower impeller inverter and scraper inverter have all been confirmed to be in the stopped state, the material box cover is in the closed state, and the dust collection port is in the open state; 3) Mixing tank mixed start Start the upper impeller, the lower impeller, the scraper plate, and the vibrator. The upper impeller and the lower impeller rotate in opposite directions. The upper impeller rotates at a high speed, and the lower impeller rotates at a low speed.

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