A tailings cemented filling material processing system and method

Abstract

The application provides a tailings cemented filling material processing system and method. The tailings cemented filling material processing system comprises a conveying unit, a homogenizing unit, a full tailings dehydration unit, a fine tailings dehydration unit and a tailings activation unit; the full tailings dehydration unit is used for dehydrating the incoming full tailings in an ultrasonic broadband liquid-solid separation mode, and inputting the dehydrated tailings into the conveying unit; the fine tailings dehydration unit is used for dehydrating the incoming fine tailings in a vibration and extrusion mode, and inputting the dehydrated tailings into the conveying unit; the tailings activation unit is used for inputting an activating agent into the conveying unit; the conveying unit is used for dispersing the incoming tailings and the activating agent, and transmitting them into the homogenizing unit; and the homogenizing unit is used for mixing the dispersed tailings and the activating agent and outputting them. The application continuously and coordinately processes the full tailings and the fine tailings according to the particle size difference, and effectively ensures that the respective water contents meet the design requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mine filling, in particular to a tailings cemented filling material processing system and method. BACKGROUND

[0002] The filling method is a mining method for supporting the surrounding rock of the mined-out area with filling materials, and the ground pressure control is achieved through two steps of ore room and ore pillar recovery, which is suitable for metal ore bodies and complex hydrogeological conditions of ore deposits. At present, tailings cemented filling process is often used, such as mixing fine sand or tailings with cement slurry, and then transporting it to the backfill area under the mine for backfilling.

[0003] The existing tailings cemented filling material processing system includes a tailings conveying pipeline, a tailings bin, a hydrocyclone, a cement pipeline, a cement bin, a screw feeder, a propeller stirring drum, a pipeline for conveying slurry with natural pressure head, and a pipeline for conveying slurry with pump pressure. The full tailings and fine sand are transported by hydraulic force into the tailings bin, and then fall into the stirring drum by gravity. The cement is blown into the cement bin through the cement pipeline, and then a certain amount of cement is added into the stirring drum through the screw feeder, while a certain amount of water is added into the stirring drum, and the cement, sand and water are stirred into cement mortar for backfilling in the stirring drum.

[0004] However, the tailings need to be dewatered before slurry preparation to increase the slurry concentration, thereby enhancing the flowability and stability of the slurry, and the high-concentration slurry formed after dewatering can more effectively fill the mined-out area and reduce the risk of subsequent settlement and cracking.

[0005] For example, the dry-throwing tailings secondary separation process disclosed in the existing patent publication CN105880008A and the process for treating and utilizing quartz sand tailings disclosed in the patent publication CN108620228A both first perform multi-stage screening on the mixed tailings, and then separately enter the same dewatering equipment for dewatering treatment. Since the particle sizes of the tailings are different, the dewatering process should also be different. For example, if the intermediate parameter value or the highest parameter value or the lowest parameter value is selected according to the process requirements, the problem of insufficient or excessive dewatering will occur. SUMMARY

[0006] The purpose of the present application is to provide a tailings cemented filling material processing system and method, which ensures that the water content of the tailings meets the design requirements and improves the concentration of the tailings.

[0007] The technical solution of the present application is: a tailings cemented filling material processing system, which comprises a conveying unit and a homogenizing unit with multiple propeller blades, and further comprises:

[0008] A full tail dewatering unit is arranged for dewatering the incoming full tailings in an ultrasonic broadband liquid-solid separation manner, and the dewatered tailings are input into the conveying unit.

[0009] a fine tailings dewatering unit for dewatering the incoming fine tailings by vibration and extrusion, and feeding the dewatered tailings into the conveying unit;

[0010] The fine tailings dewatering unit is provided with a third feeding port and a third discharging port for connecting with the conveying unit. A compression mechanism is arranged in the fine tailings dewatering unit, which can move towards the third discharging port to form a plurality of filter chambers. The filter chambers are connected by fine tailings feeding pipes, and the ends of the fine tailings feeding pipes away from the filter chambers pass through the third feeding port. A vibrator matched with the compression mechanism is arranged in the fine tailings dewatering unit.

[0011] a tailings activation unit for feeding activation agent into the conveying unit; the tailings activation unit is also used for conveying activation agent to the homogenizing unit;

[0012] The conveying unit is used for dispersing the incoming tailings and activation agent, and transmitting them to the homogenizing unit. The homogenizing unit is used for mixing and outputting the dispersed tailings and activation agent.

[0013] In the above scheme, a full tailings dewatering unit and a fine tailings dewatering unit are designed to dewater the full tailings and the fine tailings respectively. The process parameters are set separately according to the particle size difference between the full tailings and the fine tailings, so as to effectively ensure that the water content of each meets the design requirements.

[0014] Preferably, the full tailings dewatering unit is provided with a first feeding port and a first discharging port for connecting with the conveying unit. A conveying mechanism is arranged in the full tailings dewatering unit to move from the first feeding port to the first discharging port. The conveying mechanism includes an ultrasonic wide-frequency strip and a driving source for driving the ultrasonic wide-frequency strip to move. At least one high-frequency ultrasonic generator is arranged in the full tailings dewatering unit to contact the ultrasonic wide-frequency strip.

[0015] Preferably, an upwardly inclined slope is formed on the side of the ultrasonic wide-frequency strip facing the first feeding port.

[0016] Preferably, a feeding device is arranged in the fine tailings dewatering unit to convey the material falling from the compression mechanism to the third discharging port. The feeding device is located below the compression mechanism.

[0017] Preferably, the tailings activation unit is provided with a first activation agent conveying pipe connected with the conveying unit and a second activation agent conveying pipe connected with the homogenizing unit.

[0018] Preferably, the conveying unit is provided with a second feeding port, the conveying unit is provided with a metering unit, the metering unit is located below the second feeding port, the full tail dehydration unit, the fine tail dehydration unit and the tailings activation unit are connected with the second feeding port, and the metering unit is electrically connected with the tailings activation unit.

[0019] The application also provides a tailings cemented filling material processing method, which is processed by the tailings cemented filling material processing system.

[0020] The full tail dehydration unit, the fine tail dehydration unit, the tailings activation unit, the conveying unit and the homogenizing unit are started;

[0021] The full tailings enter the full tail dehydration unit, the water in the full tailings is separated by ultrasonic broadband liquid-solid separation, and the dehydrated full tailings enter the conveying unit from the full tail dehydration unit;

[0022] The fine tailings enter the fine tail dehydration unit, the water in the fine tailings is separated by vibration and extrusion, and the dehydrated fine tailings enter the conveying unit from the fine tail dehydration unit;

[0023] The tailings activation unit sends an activator to the conveying unit, the activator is mixed with the dehydrated tailings, the mixed tailings are dispersed by the conveying unit, and then the dispersed tailings are sent to the homogenizing unit;

[0024] The homogenizing unit stirs the tailings to form tailings cemented filling material, and finally outputs; the processing is completed.

[0025] Preferably, the water content of the mixture in the homogenizing unit is detected, if the water content is higher than a set value, the activator is sent to the homogenizing unit; the weight of the tailings entering the conveying unit is sensed, and a certain amount of activator is added according to the weight.

[0026] Compared with the related art, the application has the following beneficial effects:

[0027] Firstly, the application designs the full tail dehydration unit for dehydrating the full tailings and the fine tail dehydration unit for dehydrating the fine tailings, and performs continuous and collaborative processing on the full tailings and the fine tailings according to the particle size difference, and the process parameters are set separately, so that the water content of each type of tailings meets the design requirements, and the concentration of the tailings is improved;

[0028] Secondly, the application disperses the dehydrated full tailings and fine tailings in the conveying unit, solves the problem that the fine tailings cannot be fully mixed with the full tailings and the activator, and solves the problem of subsequent filling dispersion;

[0029] Thirdly, the application uses ultrasonic broadband liquid-solid separation for the full tailings, and uses vibration and extrusion for the fine tailings, so that the water content is stably lower than 25%.

[0030] Fourth, the application is designed for the characteristics of fine tailings material, such as the specific surface area of fine tailings, the characteristics of strong water retention, the combination process of vibration, extrusion and dispersion with activator, compared with the existing filter press or vacuum dewatering equipment, the dewatering efficiency of the application is improved by more than 50%, which meets the production capacity requirement of dozens to hundreds of tons per hour;

[0031] Fifth, the application realizes separate dewatering treatment of fine tailings and fine tailings, and the two process methods are different, which can increase the concentration of tailings from 26-75% to 73-85% after dewatering treatment, form high concentration slurry for filling goaf, and reduce the risk of subsequent settlement and cracking;

[0032] Sixth, the application controls the moisture content of the prepared sand flow, controls the measured moisture content of the sand, the power, frequency, disc extrusion pressure and displacement of ultrasonic and high frequency, and takes the stirring current as the index to control the feeding amount of functional reinforced materials and the speed (power) of the disperser;

[0033] Seventh, the application solves the problems of high moisture content (30-50%) of tailings in the current industry sand bin or deep cone dewatering system, large decrease (5-15% per hour) of tailings concentration with sand discharge time, and inability to discharge sand when the concentration is high (need to constantly add water to dilute, which is troublesome and unstable in quality);

[0034] Eighth, the tailings deep dewatering and activation integrated system can set a certain concentration in the range of 75-85% for stable sand discharge, and the flowability and uniformity of high concentration tailings are excellent, which further supports the subsequent self-flow and low pressure conveying, especially realizes a large increase (30-100%) in single tailings consumption. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 The tailings cemented filling material processing system provided by the application is partially cut and the stereoscopic structure of the fine tailings dewatering unit is shown in the schematic view;

[0036] Figure 2 The tailings cemented filling material processing system provided by the application is partially cut and the front view of the first shell and the second shell is shown in the schematic view;

[0037] Figure 3 The rear view of the tailings cemented filling material processing system provided by the application is shown in the schematic view.

[0038] In the attached diagram: 1. Full-tail dehydration unit; 101. First outer shell; 102. Conveying mechanism; 1021. Drive source; 1022. Ultrasonic broadband strip; 1023. First roller; 1024. Second roller; 1025. Guide wheel shaft; 1026. Drive wheel; 103. First feed inlet; 104. First discharge outlet; 105. Second discharge outlet; 106. Baffle; 107. Guide plate; 108. Support frame;

[0039] 2. Fine tail dewatering unit; 21. Second outer shell; 22. Second frame; 23. Pressing mechanism; 231. Disc; 232. Guide rod; 24. Filtering mechanism; 25. Third discharge port; 26. Feeding device; 27. Third feed port;

[0040] 3. Tailings activation unit; 4. Conveying unit; 41. Metering unit; 42. Screw conveyor; 43. Second feed inlet; 44. Fourth discharge outlet; 5. Homogenizing unit; 6. First frame; 7. Full tailings feed pipe; 8. Fine tailings feed pipe; 9. Fine tailings return pipe; 10. Drainage pipe; 11. First activator conveying pipe; 12. Second activator conveying pipe; 13. First discharge pipe; 14. Second discharge pipe; 15. Hose. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0042] like Figure 1 As shown, this embodiment provides a tailings cementitious backfill material processing system comprising a full tailings dewatering unit 1, a fine tailings dewatering unit 2, a tailings activation unit 3, a conveying unit 4, a homogenizing unit 5, and a control system. The full tailings dewatering unit 1 dewaters the incoming full tailings using ultrasonic broadband liquid-solid separation and inputs the dewatered tailings into the conveying unit 4. The fine tailings dewatering unit 2 dewaters the incoming fine tailings using vibration and compression and inputs the dewatered tailings into the conveying unit 4. The tailings activation unit 3 inputs an activator into the conveying unit 4. The conveying unit 4 disperses the incoming tailings and activator and transfers them to the homogenizing unit 5. The homogenizing unit 5 mixes the dispersed tailings and activator and outputs the mixture. The control system coordinates the actions of each unit.

[0043] like Figure 1As shown in the specific embodiments, the tailings cemented filling material processing system is further provided with a first rack 6, the full tailings dehydration unit 1 is arranged at one end above the first rack 6, the conveying unit 4 is arranged at the other end above the first rack 6, the fine tailings dehydration unit 2 is arranged above the conveying unit 4, the tailings activation unit 3 is arranged beside the first rack 6 and close to the feeding end of the conveying unit 4, and the homogenizing unit 5 is arranged beside the first rack 6 and close to the discharging end of the conveying unit 4.

[0044] As shown in the specific embodiments, Figure 2 , Figure 3 The full tailings dehydration unit 1 comprises a first shell 101, a conveying mechanism 102, a first discharging port 104, a second discharging port 105, a baffle 106, a guide plate 107 and a support frame 108. The first shell 101 has two side plates, a bottom plate enclosed between the bottom of the two side plates and a top plate enclosed between the top of the two side plates. The top plate is provided with a first feeding port 103, one end of the bottom plate is provided with the first discharging port 104, and the other end of the bottom plate is provided with the second discharging port 105.

[0045] The conveying mechanism 102 is arranged inside the first shell 101 and connects the first feeding port 103 and the first discharging port 104. The conveying mechanism 102 comprises a driving source 1021, an ultrasonic wide-frequency strip 1022, a first roller 1023, a second roller 1024, a guide wheel shaft 1025 and a driving wheel 1026. The first roller 1023 and the second roller 1024 are respectively arranged on the side walls of the first shell 101 through bearings, the first roller 1023 is arranged close to the first feeding port 103, the second roller 1024 is arranged close to the first discharging port 104, and the first roller 1023 and the second roller 1024 can rotate without driving force through the ultrasonic wide-frequency strip 1022.

[0046] The driving source 1021 can be a double-shaft motor, and the driving wheels 1026 are installed on the two ends of the motor shafts. The motor is installed on a mounting seat (not numbered), which is fixed on the side wall of the first shell 101. The ultrasonic wide-frequency strip 1022 forms a ring around the first roller 1023, the driving wheel 1026 and the second roller 1024. The first discharging port 104 is located on the extension line of the ultrasonic wide-frequency strip 1022 between the driving wheel 1026 and the second roller 1024. The ultrasonic wide-frequency strip 1022 is provided with sieve holes, which can perform ultrasonic wide-frequency liquid-solid separation on the full tailings, sieve out water and fine tailings and make them fall onto the bottom plate of the first shell 101 by gravity. The driving wheel 1026 can be a common disc wheel or a cam. If a cam is used, the position of the ultrasonic wide-frequency strip 1022 can be changed through the cross-section change of the cam, so as to vibrate the ultrasonic wide-frequency strip 1022 and promote water separation.

[0047] A plurality of guide wheels 1025 are arranged between the first roller 1023 and the driving source 1021, and a plurality of guide wheels 1025 are arranged between the driving source 1021 and the second roller 1024. The number of guide wheels 1025 is related to the length of the ultrasonic wide-frequency strip 1022. The guide wheels 1025 can be non-rotating connections, which are cylindrical and support the ultrasonic wide-frequency strip 1022.

[0048] A high-frequency ultrasonic generator is installed on the guide wheel 1025 to emit ultrasonic high frequency to the ultrasonic wide-frequency strip 1022, which is beneficial to the separation of water. The ultrasonic frequency of the high-frequency ultrasonic generator is 2000-100000Hz, and the enhanced wide frequency is 10-500r / s, which is assisted by ultrasonic dehydration. The high-frequency ultrasonic generator can be customized by ultrasonic high-frequency working principle. The number of high-frequency ultrasonic generators can be selected according to actual needs.

[0049] Since the state of the full tailings entering the first shell 101 is slurry, in order to ensure the sufficiency of ultrasonic wide-frequency liquid-solid separation and delay the flow rate of the slurry, an upward inclined slope is formed on the side of the ultrasonic wide-frequency strip 1022 facing the first feed port 103, which can be designed to be 6-15°, and the installation position of the driving source 1021 is raised to achieve this. The ultrasonic wide-frequency strip 1022 arranged at an angle can maintain a certain feeding time and match the subsequent process rhythm.

[0050] The baffle 106 is vertically connected to the inner surface of the bottom plate of the first shell 101, and the baffle 106 is located beside the first discharge port 104 to guide the material falling from the ultrasonic wide-frequency strip 1022 and ensure that the tailings after ultrasonic wide-frequency liquid-solid separation fall into the first discharge port 104.

[0051] The guide plate 107 is inclinedly connected to the outer surface of the bottom plate of the first shell 101, and the guide plate 107 is inclinedly arranged to one side of the conveying unit 4.

[0052] In order to ensure that the water and fine tailings of ultrasonic wide-frequency liquid-solid separation flow quickly into the second discharge port 105, the bottom plate of the first shell 101 can be provided with a downward slope, or the bottom plate can be designed as a combination structure with a slope and a V-shaped cross section. The first feed port 103 is connected with a full tailings feeding pipe 7, and the second discharge port 105 is connected with a fine tailings return pipe 9.

[0053] The first shell 101 is installed on the first rack 6 through the support frame 108, and the two ends of the first roller 1023 and the second roller 1024 can be extended outside, and then the extended ends of the first roller 1023 and the second roller 1024 are installed on the corresponding support frame 108 to realize the overall installation of the full tailings dehydration unit 1.

[0054] As shown in Figure 1 , Figure 2 , the fine tailings dewatering unit 2 comprises a second housing 21, a second rack 22, a compression mechanism 23, a filter mechanism 24, a hydraulic system, a third discharge port 25, a feeding device 26 and a third feeding port 27.

[0055] The upper end of the second rack 22 is provided with the compression mechanism 23, and the lower end of the second rack 22 is connected to the first rack 6. The compression mechanism 23 comprises a plurality of discs 231 and a plurality of guide rods 232. Both ends of the disc 231 are supported on the second rack 22 through the guide rod 232. One end of the guide rod 232 is connected with the disc 231, and the other end of the guide rod 232 is placed on the second rack 22. A filter mechanism 24 is arranged between every two discs 231, and the filter mechanism 24 can be a screen.

[0056] The second housing 21 is sleeved on the outside of the compression mechanism 23, and the bottom of the second housing 21 is provided with the third discharge port 25, and the top of the second housing 21 is provided with the third feeding port 27. The third feeding port 27 is connected with the fine tailings feeding pipe 8, which is used for conveying fine tailings to the fine tailings dewatering unit 2. Meanwhile, the fine tailings return pipe 9 is in communication with the fine tailings feeding pipe 8. The third discharge port 25 is arranged close to the first discharge port 104.

[0057] When a plurality of discs 231 are driven by the hydraulic system (hydraulic cylinder, etc.) to compress to the side of the third discharge port 25, a compression filtration cavity is formed between two discs 231, and the filter mechanism 24 is placed in the compression filtration cavity, so as to realize dewatering by extruding the material. The principle is similar to that of a filter press.

[0058] In order to ensure the effectiveness of fine tailings dewatering, a vibrator is arranged on the guide rod 232 at a suitable position. During the extrusion process of the disc 231, the vibrator is started to vibrate the disc 231, so as to realize dewatering of the fine tailings by vibration and extrusion. The vibrator can be a purchased part or a customized part.

[0059] A hose 15 is connected to each disc 231, and a plurality of the hoses 15 are connected to one drain pipe 10, which is used for draining the extruded water.

[0060] The feeding device 26 is arranged below the compression mechanism 23, and the feeding device 26 is used for inputting the material falling from the compression mechanism 23 to the third discharge port 25. The feeding device 26 can have a structure similar to the bottom plate of the first housing 101, or the feeding device 26 can be a plate chain line.

[0061] A pipeline is arranged in the middle of the compression mechanism 23. When two adjacent discs are attached to form a compression filtration cavity, the pipeline is in communication with each compression filtration cavity, and the pipeline is in communication with the fine tailings feeding pipe 8.

[0062] One end of the conveying unit 4 is provided with a second feeding port 43, and the other end of the conveying unit 4 is provided with a fourth discharging port 44. The second feeding port 43, the first discharging port 104 and the third discharging port 25 are arranged adjacent to each other. A metering unit 41 (optionally a weight sensor) is arranged in the conveying unit 4 and located below the second feeding port 43. The metering unit 41 is used to measure the amount of the whole tailings and the amount of the fine tailings entering, and then send the measurement results to the control system, so that the control system controls the tailings activation unit 3 to quantitatively convey the activator. A spiral conveyor 42 is arranged in the conveying unit 4, and a plurality of spiral blades are arranged on the spiral conveyor 42, which can disperse the material and then output from the fourth discharging port 44.

[0063] The tailings activation unit 3 is provided with an activator (the preparation of the activator is as shown in CN115557727B), which is communicated with the second feeding port 43 through a first activator conveying pipe 11 and communicated with the homogenizing unit 5 through a second activator conveying pipe 12. The fourth discharging port 44 is connected with the homogenizing unit 5 through a first discharging pipe 13. The dispersed tailings added with the activator are input into the homogenizing unit 5 from the first discharging pipe 13. A plurality of spiral propeller blades are arranged in the homogenizing unit 5 to stir the tailings. A detector (such as a microwave radar moisture sensor) for detecting the moisture content of the material is arranged in the homogenizing unit 5 and connected with the control system, which is used to detect the moisture content of the material in real time, so as to control the tailings activation unit 3 to supplement the activator into the homogenizing unit 5, so as to ensure that the moisture content is stably lower than 25%. The homogenizing unit 5 is connected with a second discharging pipe 14 for outputting the processed tailings cemented filling material.

[0064] The application also provides a tailings cemented filling material processing method, which is carried out by using the tailings cemented filling material processing system.

[0065] Step one, setting the sand flow range (such as 0-200L / min) and the moisture content (lower than 25%) of the homogenizing unit 5, starting the whole tailings dehydration unit 1 and the fine tailings dehydration unit 2;

[0066] Step two, the whole tailings enter the ultrasonic wide frequency belt 1022 of the conveying mechanism 102 from the whole tailings feeding pipe 7 and the first feeding port 103. The water and fine particles in the whole tailings fall to the bottom plate from the screen holes of the ultrasonic wide frequency belt 1022 under the action of ultrasonic high frequency. The screened whole tailings continue to move forward with the ultrasonic wide frequency belt 1022 and then turn and fall to the first discharging port 104, then fall along the guide plate 107 and fall into the metering unit 41 from the second feeding port 43;

[0067] The screened water and fine particles are output from the second discharging port 105 and enter the fine tailings dehydration unit 2 through the fine tailings return pipe 9.

[0068] Step three, at the same time as step two, start the hydraulic system to drive the pressing mechanism 23 to adhere to each disc, forming a closed filter chamber. Then the fine tailings from the fine tailings feeding pipe 8 into each filter chamber. Again start the hydraulic system to drive the pressing mechanism 23 to apply pressure to the fine tailings, while starting the vibrator to vibrate the disc. At this time, the water in the fine tailings is squeezed out. The water is discharged from the hose 15, the drain pipe 10 outside the system. After a certain time, the driving pressure mechanism 23 resets, the filter chamber is opened, and the pressed tailings fall onto the feeding device 26. Start the feeding device 26 to transport the tailings to the third discharge port 25, and then fall into the metering unit 41 from the second feeding port 43.

[0069] Step four, the metering unit 41 measures the total weight of the tailings of steps two and three, and sends a signal to the control system, which allocates the tailings activation unit 3 to transport a certain amount of activator from the first activator delivery pipe 11 to the second feeding port 43.

[0070] Step five, start the screw conveyor 42 of the conveying unit 4 to disperse and transport the tailings to the fourth discharge port 44. And real-time detection of the water content of the tailings in the conveying unit 4, if higher than the set value, adjust the frequency of the driving source 1021 and / or adjust the stroke of the hydraulic system and / or adjust the power and high frequency of the ultrasonic and the amount of sand, until the water content meets the set value.

[0071] Step six, the dispersed tailings fall into the homogenizing unit 5 from the fourth discharge port 44 and the first discharge pipe 13.

[0072] Step seven, start the homogenizing unit 5 to stir the tailings. And real-time detection of the water content of the tailings. If the water content is higher than the set value, adjust the tailings activation unit 3 to add activator to the homogenizing unit 5 until the set value is met.

[0073] Step eight, the tailings stirred by the homogenizing unit 5 form a tailings cemented filling material, which is finally output; the processing is completed.

[0074] The present application realizes online detection-dynamic adjustment linkage, avoiding the multiple problems of high dehydration energy consumption, low efficiency, difficult dispersion of tailings, and large fluctuation of water content in traditional process.

[0075] The present application realizes separate dehydration treatment of full tailings and fine tailings, which have different process methods. The concentration of the tailings feed can be increased from 26-75% to 73-85% after dehydration treatment, forming a high-concentration slurry for filling the goaf, and reducing the risk of subsequent settlement and cracking.

[0076] The present application controls the sand discharge flow, water content, and other parameters to prepare the tailings. The actual measured water content, the power and frequency of the ultrasonic and high frequency, the disc extrusion pressure and displacement, and the stirring current are used as indicators to control the amount of functional reinforcement material and the speed (power) of the disperser.

[0077] The present application solves the problems of the current industry sand bin or deep cone dehydration system, such as high moisture content of tailings (30-50%), large drop of tailings concentration with sand discharge time (5-15% per hour), and inability to discharge sand when the concentration is high (need to constantly monitor and dilute with water, which is troublesome and unstable in quality).

[0078] The tailings deep dewatering and activation integrated system can stably discharge sand at a certain concentration set in the range of 75-85% through multi-module cooperation, and the flowability and homogeneity of high-concentration tailings are excellent, further supporting subsequent gravity and low-pressure transportation, especially achieving a substantial increase in single tailings consumption (30-100%).

[0079] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A tailings cemented filling material processing system comprising a conveying unit (4) and a homogenizing unit (5) with a multi-layer propeller blade, characterized in that, Also included are: a full tailings dewatering unit (1) for dewatering the incoming full tailings in a manner of ultrasonic broadband liquid-solid separation, and inputting the dewatered tailings into the conveying unit (4); a fine tailings dewatering unit (2) for dewatering the incoming fine tailings in a manner of vibration and extrusion, and inputting the dewatered tailings into the conveying unit (4); The fine tailings dewatering unit (2) is provided with a third feeding port (27) and a third discharging port (25) for connecting with the conveying unit (4), and is provided with a pressing mechanism (23) inside, which can be moved towards the third discharging port (25) to form a plurality of filter cavities, which are connected through a fine tailings feeding pipe (8), and the end of the fine tailings feeding pipe (8) away from the filter cavities passes through the third feeding port (27); The fine tailings dewatering unit (2) is provided with a vibrator matched with the pressing mechanism (23); a tailings activation unit (3) for inputting an activating agent into the conveying unit (4); the tailings activation unit (3) is also used for delivering the activating agent to the homogenizing unit (5); The conveying unit (4) is used for dispersing the incoming tailings and the activating agent, and transmitting them to the homogenizing unit (5), and the homogenizing unit (5) is used for mixing and outputting the dispersed tailings and the activating agent.

2. The tailings cemented fill material processing system of claim 1, wherein, The full tailings dewatering unit (1) is provided with a first feeding port (103) and a first discharging port (104) for connecting with the conveying unit (4), and is provided with a conveying mechanism (102) inside which operates from the first feeding port (103) to the first discharging port (104); The conveying mechanism (102) includes an ultrasonic broadband strip (1022) and a driving source (1021) for driving the ultrasonic broadband strip (1022) to operate, and at least one high-frequency ultrasonic generator in contact with the ultrasonic broadband strip (1022) is arranged inside the full tailings dewatering unit (1).

3. The tailings cemented fill material processing system of claim 2, wherein, The side of the ultrasonic broadband strip (1022) facing the first feeding port (103) is formed with an upwardly inclined slope.

4. The tailings cemented fill material processing system of claim 1, wherein, The fine tailings dewatering unit (2) is provided with a feeding device (26) below the pressing mechanism (23) for conveying the material falling from the pressing mechanism (23) to the third discharging port (25).

5. The tailings cemented fill material processing system of claim 1, wherein, The tailings activation unit (3) is provided with a first activating agent conveying pipe (11) connected with the conveying unit (4) and a second activating agent conveying pipe (12) connected with the homogenizing unit (5).

6. The tailings cemented fill material processing system of claim 1, wherein, The conveying unit (4) is provided with a second feeding port (43), and is provided with a metering unit (41) inside, which is located below the second feeding port (43), and the full tailings dewatering unit (1), the fine tailings dewatering unit (2) and the tailings activation unit (3) are connected with the second feeding port (43), and the metering unit (41) is electrically connected with the tailings activation unit (3).

7. A method for processing tailings cemented filling material, which is performed using the system for processing tailings cemented filling material according to any one of claims 1 to 6, characterized in that, Included are: Start the full tailings dewatering unit (1), fine tailings dewatering unit (2), tailings activation unit (3), conveying unit (4) and homogenization unit (5); Full tailings into the full tailings dewatering unit (1), the water in the full tailings is separated by ultrasonic broadband liquid-solid separation, and the dewatered full tailings enters the conveying unit (4) from the full tailings dewatering unit (1); Fine tailings enter the fine tailings dewatering unit (2), and the water in the fine tailings is separated by vibration and extrusion, and the dewatered fine tailings enters the conveying unit (4) from the fine tailings dewatering unit (2); The tailings activation unit (3) delivers an activating agent to the conveying unit (4), the activating agent is mixed with the dewatered tailings, and the mixed tailings are dispersed by the conveying unit (4) and delivered to the homogenization unit (5); The homogenization unit (5) stirs the tailings to form a tailings cemented filling material, and finally outputs; Complete processing.

8. A tailings cemented fill material processing method according to claim 7, characterized in that, Detect the moisture content of the mixed material in the homogenization unit (5), and when the moisture content is higher than the set value, deliver the activating agent to the homogenization unit (5); Measure the weight of the tailings entering the conveying unit (4), and add a certain amount of activating agent according to the weight.

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