Desulfurized gypsum and fly ash experimental device and method for rebuilding leymus chinensis vegetation in mining area

Abstract

The invention discloses a desulfurized gypsum and fly ash experimental device and method for mining area leymus chinensis vegetation reconstruction, and relates to the technical field of ecological restoration, the desulfurized gypsum and fly ash experimental device comprises a mounting cover, a mixing box, a stirring mechanism, a flapping mechanism, a conveying belt, a placing box, a culture basin, an air freezing and thawing testing machine, a detection machine, a data processing end and a cleaning machine, the rear end of the top in the mounting cover is fixedly connected with a mixing box, a stirring mechanism is arranged, through rotation and movement of two sets of weak direct-current electric field mechanisms and work of an ultrasonic atomization spray head, material caking is broken, mixing dead corners are eliminated, the uniformity of matrixes with different proportions is accurately regulated and controlled, meanwhile, materials penetrate, dead-corner-free infiltration is achieved, and the mixing efficiency is improved. The interface combination of the mineral substances, the organic matters and the biological bacterial liquid is enhanced, the matrix stability and the nutrient effectiveness are improved, and a uniform and high-activity mixed system is provided for the construction of the ternary composite artificial soil.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ecological restoration, and particularly relates to a desulfurization gypsum fly ash experimental device and method for grassland vegetation reconstruction in a mining area. BACKGROUND

[0002] The desulfurization gypsum fly ash experiment for grassland vegetation reconstruction in a mining area is to use industrial solid waste to improve the poor soil matrix in the mining area to create growth conditions for the grass and finally realize ecological reconstruction. In the prior art, it is difficult to break the material agglomeration and eliminate the mixing dead angle during the mixing of the material, so it is difficult to accurately control the uniformity of different proportioning matrices, and some equipment is difficult to penetrate the material to realize dead angle soaking, so it is difficult to strengthen the interface combination of mineral matter and organic matter and biological bacteria liquid, reduce the stability and nutrient availability of the matrix, and further provide a uniform and high-activity mixing system for ternary composite artificial soil construction. The prior art is difficult to promote the "electro-assembly" of stable aggregates at the microscale while mechanically mixing, which reduces the uniformity of the modifier distribution, and it is difficult to accelerate the optimization and maturation process of the soil structure from the physical and chemical nature, and further realize the leap from "random mixing" to "precise construction". Finally, in the use process of the prior art, it is difficult to simulate the physical stress of rainfall splashing and animal touching in nature to induce the plant to produce "contact morphological formation" physiological response, so as to promote the grass stems to be more robust and the root system to be more developed, and further improve the ability of the seedlings to resist lodging and wind erosion and the overall toughness, and reduce the field survival adaptability after planting. In the use process of the prior art, it is difficult to place a long-acting biological "ammunition depot" in the rhizosphere of the plant, so as to continuously and stably release active microorganisms and nutrients, reduce the utilization efficiency and colonization success rate of the bacterial agent, accurately construct a local high-activity microorganism "hot spot", and strongly drive the rhizosphere micro-ecological restoration and nutrient circulation, and further simulate and accelerate the biological driving soil formation process of the natural soil. SUMMARY

[0003] Therefore, in order to solve the above problems, the present application provides a desulfurization gypsum fly ash experimental device and method for grassland vegetation reconstruction in a mining area.

[0004] The application is achieved by constructing a desulfurized gypsum fly ash experimental device and method for mine area Leymus chinensis vegetation reconstruction, which comprises a mounting cover, a mixing box fixedly connected to the inner top rear end of the mounting cover, a stirring mechanism fixedly connected to the top rear end of the mounting cover, a beating mechanism fixedly connected to the inner top front end of the mounting cover, a conveying belt arranged at the front end and the left end of the mounting cover, a placing box arranged at the top of the conveying belt, three groups of culture pots placed in the inner bottom of the placing box, an air freeze-thaw tester arranged at the bottom right side of the conveying belt at the left end of the mounting cover, a detection machine arranged at the bottom center of the conveying belt at the left end of the mounting cover, a data processing end fixedly connected to the bottom left end of the conveying belt at the left end of the mounting cover, and a cleaning machine arranged at the bottom of the mounting cover. The stirring mechanism comprises a first mounting box, a weak direct current electric field mechanism arranged at the left and right sides below the first mounting box, an ultrasonic atomizing nozzle fixedly connected to the inner side of the weak direct current electric field mechanism, a first motor fixedly connected to the inner top of the first mounting box, a rotating disc fixedly connected to the bottom output shaft of the first motor, a first rotating rod rotatably connected to the left and right ends of the top of the rotating disc, a first moving rod rotatably connected to the outer side of the bottom of the first rotating rod, a second motor fixedly connected to the outer side of the first moving rod, wherein the bottom output shaft of the second motor penetrates through the bottom of the first mounting box and is slidably connected to the inside of the first mounting box, the first moving rod penetrates through the left and right ends of the limiting plate and is slidably connected to the inside of the limiting plate, a connecting rod is fixedly connected to the bottom of the rotating disc, and the connecting rod is arranged in a segmented manner and specifically composed of two groups of rod bodies which are sleeved with each other, the upper and lower rod bodies of the connecting rod are respectively inserted and fixed with the upper and lower grooves of the electromagnetic clutch, the bottom of the connecting rod is fixedly connected with the inner gear of the gear and tooth plate, and a control switch is fixedly connected to the left end of the bottom of the limiting plate.

[0005] Preferably, the weak direct current electric field mechanism comprises a mounting shell, the mounting shell is arranged at the left and right sides below the first mounting box, a PLC controller is fixedly connected to the inner top of the mounting shell, a micro-programmed direct current stabilized power supply is fixedly connected to the inner left end below the mounting shell, cables are inserted into the right rear end and the right end center of the micro-programmed direct current stabilized power supply, a rotating shaft is rotatably connected to the bottom of the mounting shell, the rotating shaft penetrates through three groups of connecting blocks and is fixedly connected to the inside of the connecting blocks, a conductive slip ring is rotatably connected to the inner upper side of the rotating shaft, stirring paddles are fixedly connected to the left and right ends of the connecting blocks, electrode sheets are fixedly connected to the inside of the stirring paddles, micro electric field intensity sensors are fixedly connected to the inner bottom of the stirring paddles, and micro temperature sensors are fixedly connected to the inner bottom of the stirring paddles.

[0006] Preferably, the beating mechanism comprises a pneumatic cylinder, the inner top front end of the mounting cover is fixedly connected with the pneumatic cylinder, the bottom of the pneumatic cylinder is fixedly connected with a second mounting box, the front end of the second mounting box is slidably connected with two groups of sliding rods, the front end of the sliding rod is fixedly connected with a soft beating arm, the right end of the second mounting box is fixedly connected with a release mechanism, the right end in the second mounting box is fixedly connected with a connecting seat, the bottom right end of the connecting seat is fixedly connected with a fourth motor, the top output shaft of the fourth motor is fixedly connected with the bottom right end of a second rotating block, the top left end of the second rotating block is rotatably connected with the bottom front end of a second rotating rod, the bottom rear end of the second rotating rod is rotatably connected with a matching rod, and the bottom left and right ends of the matching rod are rotatably connected with second swing rods.

[0007] Preferably, the release mechanism comprises a third mounting box, the right end of the second mounting box is fixedly connected with the third mounting box, the top of the third mounting box is fixedly connected with a mounting plate, the back of the mounting plate is fixedly connected with a third motor, the front output shaft of the third motor is fixedly connected with the back right end of a first rotating block, the front left side of the first rotating block is rotatably connected with a first swing rod, the back lower side of the first swing rod is rotatably connected with a sliding block, the bottom of the sliding block is fixedly connected with a second moving rod, the bottom of the second moving rod is inserted with a porous slow-release tube, the left and right ends of the porous slow-release tube are adhesively connected with non-woven fabrics, the vermiculite carrier in the porous slow-release tube is filled, and the biological fertilizer microbial agent is adsorbed on the outer wall of the vermiculite carrier.

[0008] Preferably, the back of the limiting plate is fixedly connected with the rear end in the first mounting box, and the bottom output shaft of the second motor is fixedly connected with a mounting shell.

[0009] Preferably, the inner gear top of the gear tooth plate piece is rotatably connected with the bottom of the limiting plate, the inner tooth plate top of the gear tooth plate piece is slidably connected with the bottom of the limiting plate, and the control switch is electrically connected with the ultrasonic atomizing nozzle.

[0010] Preferably, the right rear end cable top of the micro-program-controlled direct-current stabilized power supply is connected with the bottom of the PLC controller, the inner wall of the conductive slip ring is connected with the cable at the right end center of the micro-program-controlled direct-current stabilized power supply, the electrode sheet is connected with the cable at the right end center of the micro-program-controlled direct-current stabilized power supply, and the micro-electric field intensity sensor and the micro-temperature sensor are electrically connected with the PLC controller.

[0011] Preferably, the bottom right end of the second rotating block is rotatably connected with the top right end of the connecting seat, and the bottom center of the second swing rod is rotatably connected with the top of the connecting seat.

[0012] Preferably, the back right end of the first rotating block is rotatably connected with the front end of the mounting plate, the outer wall of the sliding block is slidably connected with the mounting plate, and the second moving rod penetrates through the bottom of the mounting plate and the bottom of the third mounting box and is slidably connected with the interiors thereof.

[0013] Preferably, an experimental method of desulfurized gypsum and fly ash for the reconstruction of a mine area Leymus chinensis vegetation includes the following steps: Step one: sampling; the staff collects mine tailings soil, fly ash, and desulfurized gypsum through external equipment, and uses ICP-MS and XRF methods to comprehensively detect the total amount of heavy metals, pH, salinity, and nutrients in the above materials to ensure that the pollutants in the solid waste do not exceed the standard; Step two: mixing; mix the "tailings soil-desulfurized gypsum-fly ash" mixture in proportion through a stirring mechanism and a weak direct current field mechanism to obtain industrial solid waste, and compact it to 10 cm high; Step three: dry-wet-freezing coupling cycle; fill the PVC aging column from bottom to top with filter paper, 100-mesh nylon mesh, quartz sand with a height of 2 cm and washed and dried with ionized water, 100-mesh nylon mesh, 10 cm high mine pit soil, 100-mesh nylon mesh, 10 cm high industrial solid waste from step two, and filter paper to realize the structural perfection of the PVC aging column. Deionized water slowly saturates the PVC aging column to the predetermined humidity through capillary action. Then the staff places the PVC aging column in an air freeze-thaw tester for dry-wet-freezing coupling cycle, wherein the dry heat period is 30°C with 10% humidity for 2 days to simulate summer, and the frozen cold period is -30°C with 20% humidity for 2 days to simulate winter. A total of 9 cycles are performed to simulate about 5 years of natural weathering process in the local area. After the experiment, sample layer by layer, and measure the heavy metal content and morphological changes of 10 cm high mine pit soil and 10 cm high industrial solid waste soil to evaluate the migration risk of pollutants; Step four: treatment; select the best desulfurized gypsum and fly ash addition amount through step three pre-test, and set 10 treatment levels according to the desulfurized gypsum and fly ash addition amount. Each treatment group sets 4 parallel culture pots, i.e. the same proportion of soil and planting conditions are repeated 4 times, a total of 40 pots; Step five: mixing; put 3 kg of tailings soil, the best desulfurized gypsum addition amount selected by step three pre-test, and the fly ash addition amount selected by step three pre-test, and cow dung ash into a mixing box and mix them through a stirring mechanism and a weak direct current field mechanism; Step six: test; select Leymus chinensis as the test plant, which is drought-resistant, cold-resistant, wind-sand-resistant, and thin soil-tolerant. Soak the seeds in 10% hydrogen peroxide for 10 minutes, and then wash them with deionized water. Put the uniform and plump seeds into a self-sealing bag, and uniformly sow 100 seeds in each culture pot. According to different groups, quantitatively weigh the mixture of step five, and regularly water the culture pots during the test period to keep the added modifier at 75% of the maximum water holding capacity and maintain mild drought; Step seven: simulation; simulate rainfall splashing and animal touching by beating the sheep grass with a beating mechanism, and simulate the microorganism-soil-plant interaction process in the field ecological restoration by slowly releasing the microbial agent through a release mechanism; Step eight: sampling and determination; at the end of the cultivation period of the test sheep grass, the aboveground part is cut along the base of the stem, the soil is poured out, the plant root system is gently taken out and the surface soil is shaken off, the root system is washed clean with distilled water, then the excess water is absorbed, 2g of fibrous roots and 2g of leaves are weighed and put into sterile self-sealing bags, immediately frozen and stored in a-20℃ refrigerator; the rest of the aboveground and underground plant parts are put into envelopes for biomass determination; Step nine: detection; the detection machine adopts the detection methods of inductively coupled plasma mass spectrometry, automatic nitrogen determination instrument method for total nitrogen determination, sodium bicarbonate extraction-molybdenum antimony anti-spectrophotometric method for detecting the contents of heavy metals, total nitrogen, organic matter, available phosphorus, available potassium and slow-acting potassium in the sample; Step ten: test data processing; through the data processing end, the experimental data is calculated and arranged by using Microsoft Excel 2010 software, single factor and multi-factor variance analysis is carried out by using SPSS 23.0 software, the difference significance is defined as P<0.05; pearson correlation analysis is carried out, all data are the average values of 4 times of repetition, Origin 2021 is used for drawing charts, the changes of heavy metal content, plant growth and physicochemical index analysis of fly ash and desulfurization gypsum in the process of ecological restoration of the mine are researched, and the new soil improvement technology is improved.

[0014] The present application has the following advantages: the present application provides a desulfurization gypsum fly ash experimental device and method for mine area sheep grass vegetation reconstruction, compared with the same type of equipment, the following improvements are made: This invention discloses an experimental device and method for reconstructing Leymus chinensis vegetation in mining areas using desulfurized gypsum and fly ash. The device includes a stirring mechanism that, through the rotation and movement of two sets of weak DC electric field mechanisms and the operation of ultrasonic atomizing nozzles, breaks up material agglomerates, eliminates mixing dead zones, and precisely controls the uniformity of different substrate ratios. Simultaneously, it penetrates the material to achieve seamless wetting, strengthens the interfacial bonding between minerals, organic matter, and biological bacterial solutions, and improves substrate stability and nutrient availability, providing a uniform and highly active mixing system for constructing ternary composite artificial soil. The weak DC electric field mechanism, through electrode plates, promotes the "electro-induced assembly" of stable aggregates at the microscale while mechanically mixing, improving the uniformity of amendment distribution. It also accelerates the optimization and maturation process of soil structure from a physicochemical perspective, thus achieving a leap from "random mixing" to "precise construction." Finally, a tapping mechanism is included, using two sets of soft tapping arms to tap the soil... The sheepgrass in the pot is patted to simulate the physical stress of rain splash and animal contact in nature, inducing the plant to produce a "contact morphogenesis" physiological response, which makes the sheepgrass stems thicker and the root system more developed. This improves its resistance to lodging and wind erosion and its overall toughness in the seedling stage, and enhances its survival adaptability in the wild after planting. A release mechanism is set up to slowly release the bio-fertilizer agent adsorbed on the outer wall of the vermiculite carrier through the micropores of the porous slow-release tube. In conjunction with the water and fertilizer system, a three-element synergistic supply of "desulfurized gypsum / fly ash-cow manure-bacterial agent" is achieved, simulating the microbial-soil-plant interaction process in actual ecological restoration. This continuously and stably releases active microorganisms and nutrients, improves the utilization efficiency of the agent and the colonization success rate, and precisely creates local high-activity microbial "hot spots" to strongly drive the restoration of the rhizosphere microecology and nutrient cycle. At the same time, non-woven fabric prevents the vermiculite carrier from leaking out, ensuring that water and roots can enter smoothly. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the process flow of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the mounting cover of the present invention; Figure 3 This is a three-dimensional structural diagram of the stirring mechanism of the present invention; Figure 4 This is a three-dimensional exploded view of the stirring mechanism and the weak DC electric field mechanism of the present invention; Figure 5 This is the present invention. Figure 4 Enlarged structural diagram at point A; Figure 6 This is a front view structural schematic diagram of the stirring impeller of the present invention; Figure 7 This is the present invention. Figure 6 Enlarged structural diagram at point B; Figure 8 This is a three-dimensional structural diagram of the striking mechanism and the releasing mechanism of the present invention; Figure 9 This is a three-dimensional exploded view of the striking mechanism of the present invention; Figure 10 This is a three-dimensional exploded view of the release mechanism of the present invention; Figure 11 This is a front view of the porous slow-release tube of the present invention.

[0016] The components include: mounting cover-1, mixing box-2, stirring mechanism-3, first mounting box-31, weak DC electric field mechanism-32, mounting shell-321, PLC controller-322, micro programmable DC regulated power supply-323, cable-324, rotating shaft-325, connecting block-326, conductive slip ring-327, stirring paddle-328, electrode plate-329, micro electric field strength sensor-3210, micro temperature sensor-3211, ultrasonic atomizing nozzle-33, first motor-34, turntable-35, first rotating rod-36, first moving rod-37, second motor-38, limit plate-39, connecting rod-310, electromagnetic clutch-311, gear tooth plate-312, and control switch-3. 13. Tapping Mechanism - 4. Cylinder - 41. Second Mounting Box - 42. Sliding Rod - 43. Soft Tapping Arm - 44. Release Mechanism - 45. Third Mounting Box - 451. Mounting Plate - 452. Third Motor - 453. First Rotating Block - 454. First Swinging Rod - 455. Sliding Block - 456. Second Moving Rod - 457. Porous Slow-Release Tube - 458. Non-woven Fabric - 459. Vermiculite Carrier - 4510. Connecting Seat - 46. Fourth Motor - 47. Second Rotating Block - 48. Second Rotating Rod - 49. Matching Rod - 410. Second Swinging Rod - 411. Conveyor Belt - 5. Placement Box - 6. Culture Pot - 7. Air Freeze-Thaw Tester - 8. Testing Machine - 9. Data Processing Terminal - 10. Cleaning Machine - 11. Detailed Implementation

[0017] The following is in conjunction with the appendix Figures 1-11 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0018] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments will be described below according to the overall structure of the present application.

[0020] Embodiment one: Please refer to Figures 1-4 The present application is a kind of mine desulfurization gypsum fly ash experimental device and method for reestablishing Leymus mollis vegetation, comprising a mounting cover 1, a mixing box 2 is fixedly connected to the top rear end in the mounting cover 1, the mounting cover 1 top rear end and the outer wall of the stirring mechanism 3 are fixedly connected, the mounting cover 1 inside top front end is fixedly connected with the beating mechanism 4, the front end and the left end of the mounting cover 1 are both provided with a conveyor belt 5, the top of the conveyor belt 5 is provided with a placing box 6, three groups of culture pots 7 are placed in the bottom of the placing box 6, the bottom right side of the conveyor belt 5 at the left end of the mounting cover 1 is provided with an air freeze-thaw testing machine 8, the bottom center of the conveyor belt 5 at the left end of the mounting cover 1 is provided with a detection machine 9, the bottom left end of the conveyor belt 5 at the left end of the mounting cover 1 is fixedly connected with a data processing end 10, and the bottom of the mounting cover 1 is provided with a cleaning machine 11.

[0021] The stirring mechanism 3 comprises a first mounting box 31, the mounting cover 1 top rear end and the outer wall of the first mounting box 31 are fixedly connected, the left and right sides below the first mounting box 31 are both provided with a weak direct current field mechanism 32, the inner side of the weak direct current field mechanism 32 is fixedly connected with an ultrasonic atomizing nozzle 33, and the ultrasonic atomizing nozzle 33 is connected with the external liquid component conveying equipment.

[0022] A first motor 34 is fixedly connected to the top of the first mounting box 31, a turntable 35 is fixedly connected to the bottom output shaft of the first motor 34, first rotating rods 36 are rotatably connected to the top left and right ends of the turntable 35, first moving rods 37 are rotatably connected to the bottom outer side of the first rotating rods 36, and the first rotating rods 36 facilitate the movement of the first moving rods 37.

[0023] The first moving rod 37 is fixedly connected with a second motor 38 outside, and the bottom output shaft of the second motor 38 penetrates through the bottom of the first mounting box 31 and is slidably connected with the inside of the first mounting box 31, the first moving rod 37 penetrates through the left and right ends of the limiting plate 39 and is slidably connected with the inside of the limiting plate 39, the bottom of the rotating disc 35 is fixedly connected with a connecting rod 310, and the connecting rod 310 is provided in a segmented manner and is specifically composed of two groups of rod bodies which are telescopically connected, the upper and lower rod bodies of the connecting rod 310 are respectively inserted and fixed with the upper and lower notches of an electromagnetic clutch 311, and the electromagnetic clutch 311 is convenient for clamping the connecting rod 310.

[0024] The bottom of the connecting rod 310 is fixedly connected with the internal gear of a gear tooth plate 312, the left end of the bottom of the limiting plate 39 is fixedly connected with a control switch 313, the back of the limiting plate 39 is fixedly connected with the rear end in the first mounting box 31, and the bottom output shaft of the second motor 38 is fixedly connected with a mounting shell 321, and the limiting plate 39 is convenient for limiting the movement of the first moving rod 37.

[0025] The top of the internal gear of the gear tooth plate 312 is rotatably connected with the bottom of the limiting plate 39, the top of the internal gear plate of the gear tooth plate 312 is slidably connected with the bottom of the limiting plate 39, and the control switch 313 is electrically connected with the ultrasonic atomizing nozzle 33.

[0026] The working principle of the desulfurized gypsum fly ash experimental device and method for mine area Leymus chinensis vegetation reconstruction based on example one is: When using the device, first place the device in the working area, then connect the device with an external power supply, and the device can be provided with the power required for work; The staff collects mine tailings soil, fly ash and desulfurized gypsum by using external equipment, uses ICP-MS and XRF methods to comprehensively detect the total amount of heavy metals, pH, salt content and nutrients in the above materials, and ensures that the pollutants in solid waste do not exceed the standard; When the two groups of weak DC electric field mechanisms 32 need to be driven to work, the first motor 34 is started, the first motor 34 drives the rotating disc 35 to rotate, the rotating disc 35 drives the two groups of first moving rods 37 to gradually shorten or increase the distance between the two groups of first moving rods 37 through the rotating connection with the two groups of first rotating rods 36, the two groups of first moving rods 37 drive the two groups of second motors 38 to gradually shorten or increase the distance between the two groups of second motors 38, and the two groups of second motors 38 drive the two groups of weak DC electric field mechanisms 32 to gradually shorten or increase the distance between the two groups of weak DC electric field mechanisms 32, and then the two groups of second motors 38 are started, the two groups of second motors 38 drive the two groups of weak DC electric field mechanisms 32 to rotate, and at the same time that the two groups of weak DC electric field mechanisms 32 rotate and move, the electromagnetic clutch 311 is started synchronously, so that the electromagnetic clutch 311 clutches the connecting rod 310, thereby making the rotating disc 35 drive the connecting rod 310 to rotate at the same time of rotating, the connecting rod 310 drives the internal gear of the gear and tooth plate piece 312 to rotate, the internal gear of the gear and tooth plate piece 312 drives the internal tooth plate of the gear and tooth plate piece 312 to move to the left, so that the internal tooth plate of the gear and tooth plate piece 312 extrudes the control switch 313, thereby making the control switch 313 drive the ultrasonic atomizing nozzle 33 to work, the ultrasonic atomizing nozzle 33 sprays the external liquid component into the material in the form of extremely fine mist droplets, breaks the material agglomeration, eliminates the mixing dead angle, accurately controls the uniformity of different proportioning substrates, simultaneously penetrates the material to realize dead angle-free infiltration, strengthens the interface combination of minerals and organic matter, biological bacteria liquid, improves the stability and nutrient availability of the substrate, provides a uniform and high-activity mixed system for the construction of the ternary composite artificial soil, and then mixes the "tailings soil-desulfurized gypsum-fly ash" loaded in the mixing box 2 to obtain industrial solid waste, and at the same time, the industrial solid waste is compacted to 10 cm high through external equipment, and the tailings soil, the best desulfurized gypsum addition amount screened out by the pre-test, the fly ash addition amount screened out by the pre-test and the cow dung ash, a total of 3 kg, are mixed.

[0027] Example two: Please refer to Figures 4-7 Compared with example one, the desulfurized gypsum and fly ash experimental device and method for mine area Chinese wildrye grass vegetation reconstruction of the present application further comprises a weak DC electric field mechanism 32, the weak DC electric field mechanism 32 comprises a mounting shell 321, the mounting shell 321 is arranged below and on both sides of the first mounting box 31, a PLC controller 322 is fixedly connected to the top of the mounting shell 321, a micro-programmed DC stabilized power supply 323 is fixedly connected to the lower left end of the mounting shell 321, cables 324 are inserted into the right rear end and the right end center of the micro-programmed DC stabilized power supply 323, and the micro-programmed DC stabilized power supply 323 is convenient for supplying power to the electrode sheet 329 through the cables 324 and the conductive slip ring 327.

[0028] The bottom of the installation shell 321 is rotationally connected with a rotating shaft 325, the rotating shaft 325 penetrates through three groups of connecting blocks 326 and is fixedly connected with the interiors thereof, the rotating shaft 325 is rotationally connected with a conductive slip ring 327 at the upper portion thereof, both left and right ends of the connecting blocks 326 are fixedly connected with stirring paddles 328, the rotating shaft 325 penetrates through the top of the installation cover 1 and the top of the mixing box 2 and is rotationally connected with the interiors thereof, and the stirring paddles 328 are arranged in the interior of the mixing box 2.

[0029] The stirring paddles 328 are fixedly connected with electrode sheets 329, a micro electric field intensity sensor 3210 is fixedly connected to the bottom of the stirring paddles 328, and a micro temperature sensor 3211 is fixedly connected to the bottom of the stirring paddles 328, the top of a cable 324 at the right rear end of a micro program-controlled direct-current stabilized power supply 323 is connected with the bottom of a PLC controller 322, and the micro electric field intensity sensor 3210 and the micro temperature sensor 3211 facilitate real-time collection of electric field intensity and temperature data of the mixing area.

[0030] The inner wall of the conductive slip ring 327 is connected with the cable 324 at the center of the right end of the micro program-controlled direct-current stabilized power supply 323, the electrode sheets 329 are connected with the cable 324 at the center of the right end of the micro program-controlled direct-current stabilized power supply 323, and the micro electric field intensity sensor 3210 and the micro temperature sensor 3211 are electrically connected with the PLC controller 322.

[0031] In this embodiment, When it is necessary to apply a controllable weak direct-current electric field to the mixing area, a worker presets weak direct-current electric field intensity and temperature threshold parameters through the PLC controller 322, then the micro program-controlled direct-current stabilized power supply 323 supplies power to the electrode sheets 329 through the cable 324 and the conductive slip ring 327, a weak direct-current electric field is formed in the mixing area through the electrode sheets 329, then the micro electric field intensity sensor 3210 and the micro temperature sensor 3211 collect electric field intensity and temperature data of the mixing area in real time and feed back to the PLC controller 322, the PLC controller 322 dynamically adjusts the output of the stabilized power supply according to the feedback value, realizes precise controllability of the electric field intensity and temperature abnormality early warning, and when the two groups of second motors 38 are working, the two groups of second motors 38 drive the installation shell 321 to rotate, the installation shell 321 drives the rotating shaft 325 to rotate, the rotating shaft 325 drives the stirring paddles 328 to rotate through the three groups of connecting blocks 326, realizes mechanical mixing, promotes “electrode assembly” of stable aggregates on a micro scale, improves the uniformity of the distribution of the modifier, simultaneously accelerates the optimization and maturation process of the soil structure from the physical and chemical essence, and further realizes the leap from “random mixing” to “precise construction”.

[0032] Embodiment three Please refer to Figures 8-9Compared with the first embodiment, the present application further comprises a beating mechanism 4, the beating mechanism 4 comprises a gas cylinder 41, the gas cylinder 41 is fixedly connected to the top front end of the installation cover 1, a second installation box 42 is fixedly connected to the bottom of the gas cylinder 41, two groups of sliding rods 43 are slidingly connected to the front end of the second installation box 42, soft beating arms 44 are fixedly connected to the front end of the sliding rods 43, and the second installation box 42 is convenient for limiting the movement of the sliding rods 43.

[0033] A releasing mechanism 45 is fixedly connected to the right end of the second installation box 42, a connecting seat 46 is fixedly connected to the right end in the second installation box 42, a fourth motor 47 is fixedly connected to the bottom right end of the connecting seat 46, the top output shaft of the fourth motor 47 is fixedly connected to the bottom right end of a second rotating block 48, and the fourth motor 47 is convenient for driving the second rotating block 48 to rotate.

[0034] The top left end of the second rotating block 48 is rotatably connected to the bottom front end of a second rotating rod 49, a matching rod 410 is rotatably connected to the bottom rear end of the second rotating rod 49, second swing rods 411 are rotatably connected to the bottom left and right ends of the matching rod 410, and the matching rod 410 is convenient for driving the second swing rods 411 to swing.

[0035] The bottom right end of the second rotating block 48 is rotatably connected to the top right end of the connecting seat 46, the bottom center of the second swing rod 411 is rotatably connected to the top of the connecting seat 46, and the front end of the second swing rod 411 is fixedly connected to the sliding rod 43.

[0036] In the embodiment: First, the outside PVC aging column is filled from bottom to top with filter paper, 100-mesh nylon mesh, quartz sand with a height of 2 cm and washed by ionized water and dried, 100-mesh nylon mesh, 10 cm high mine soil, 100-mesh nylon mesh, 10 cm high industrial solid waste, and filter paper, to realize the structural perfection of the outside PVC aging column. Deionized water slowly saturates the PVC aging column to a predetermined humidity by capillary action, and then the staff places the PVC aging column in the air freeze-thaw tester 8 to perform dry-wet-freeze coupling cycles. In the dry heat period, the temperature is 30°C, the humidity is 10%, and it lasts for 2 days to simulate summer. In the frozen cold period, the temperature is -30°C, the humidity is 20%, and it lasts for 2 days to simulate winter. A total of 9 cycles are performed to simulate about 5 years of natural weathering process in the local area. After the experiment is completed, the samples are taken in layers, and the heavy metal content and morphological changes of the 10 cm high mine soil and the 10 cm high industrial solid waste soil are measured to evaluate the migration risk of pollutants. The best desulfurization gypsum and fly ash addition amount are selected through the above pre-test steps. According to the addition amount of the desulfurization gypsum and fly ash, the experiment is set up with 10 treatment levels, and each treatment group is set up with 4 parallel culture pots 7, i.e. the same proportion of soil and planting conditions are repeated 4 times, a total of 40 pots. Then, the sheep grass is selected as the test plant, which is drought-resistant, cold-resistant, wind-sand-resistant, and barren-tolerant. The seeds are soaked in 10% hydrogen peroxide for 10 minutes and then washed with deionized water. The uniform and plump seeds are placed in a self-sealing bag, and each culture pot 7 is uniformly sowed with 100 seeds. According to different groups, the mixed material is quantitatively weighed in proportion. During the test period, the sheep grass in the culture pots 7 is periodically watered by weighing method to keep the test added modifier at 75% of the maximum water holding capacity, maintaining a light drought. Second, when the sheep grass needs to be beaten, the air cylinder 41 is started, the air cylinder 41 drives the second mounting box 42 to move downward, the second mounting box 42 drives the sliding rod 43 and the soft beating arm 44 to move downward, the front side of the installation cover 1 drives the placing box 6 to move in XY axis, so that the sheep grass in the culture pot 7 contacts with the soft beating arm 44, then the fourth motor 47 is started, the fourth motor 47 drives the second rotating block 48 to rotate, the second rotating block 48 drives the second rotating rod 49 to swing, the second rotating rod 49 drives the two groups of second swinging rods 411 to swing left and right on the top of the connecting seat 46 through the matching rod 410, the two groups of second swinging rods 411 drive the two groups of sliding rods 43 to swing left and right, the two groups of sliding rods 43 drive the two groups of soft beating arms 44 to swing left and right, and the two groups of soft beating arms 44 beat the sheep grass in the culture pot 7, simulating the physical stress of rainfall splashing and animal touching in nature, inducing the physiological response of "contact morphological establishment" of the plant, and promoting the stem of the sheep grass to be more robust and the root system to be more developed, so as to improve the ability of the seedling stage to resist lodging, wind erosion and overall toughness, and improve the survival adaptability in the field after planting.

[0037] Example Four: Please refer to Figures 10-11 Compared with the first embodiment, the desulfurized gypsum fly ash experimental device and method for mine area leymus chinensis vegetation reconstruction of the present application further comprises a release mechanism 45. The release mechanism 45 comprises a third mounting box 451. The right end of the second mounting box 42 is fixedly connected with the third mounting box 451. The inner top of the third mounting box 451 is fixedly connected with a mounting plate 452. The back of the mounting plate 452 is fixedly connected with a third motor 453 above. The mounting plate 452 facilitates the installation and fixation of the third motor 453.

[0038] The front end output shaft of the third motor 453 is fixedly connected with the back right end of a first rotating block 454. The front end left side of the first rotating block 454 is rotatably connected with a first swing rod 455. The back lower part of the first swing rod 455 is rotatably connected with a sliding block 456. The third motor 453 facilitates the rotation of the first rotating block 454.

[0039] The bottom of the sliding block 456 is fixedly connected with a second moving rod 457. The bottom of the second moving rod 457 is inserted with a porous slow-release tube 458. The left and right ends of the porous slow-release tube 458 are adhesively connected with non-woven fabrics 459. The porous slow-release tube 458 is filled with a vermiculite carrier 4510. The outer wall of the vermiculite carrier 4510 is adsorbed with a bio-fertilizer agent. The non-woven fabric 459 facilitates the prevention of the leakage of the vermiculite carrier 4510, ensuring the smooth entry of water and root systems.

[0040] The back right end of the first rotating block 454 is rotatably connected with the front end of the mounting plate 452. The outer wall of the sliding block 456 is slidably connected with the mounting plate 452. The second moving rod 457 penetrates through the bottom of the mounting plate 452 and the bottom of the third mounting box 451 and is slidably connected with the inside thereof.

[0041] In this embodiment: When it is necessary to embed the porous slow-release tube 458 in the mixture in the culture pot 7, the air cylinder 41 is started, the air cylinder 41 drives the second mounting box 42 to move downward, the second mounting box 42 drives the third mounting box 451 to move downward, and the culture pot 7 in the placing box 6 is moved by the conveying belt 5 to move in the XY axis, so that the porous slow-release tube 458 is moved to above the culture pot 7, when the mixture in the culture pot 7 is added to half of the culture pot 7, the third motor 453 is started, the third motor 453 drives the first rotating block 454 to rotate, the first rotating block 454 drives the sliding block 456 to move downward in the mounting plate 452 through the rotating connection with the first swing rod 455, the sliding block 456 drives the second moving rod 457 to move downward, the second moving rod 457 drives the porous slow-release tube 458 to move downward, through the plug connection between the second moving rod 457 and the porous slow-release tube 458, the second moving rod 457 is separated from the porous slow-release tube 458, then the staff continues to add the mixture into the culture pot 7 to cover the porous slow-release tube 458, the biological fertilizer adsorbed on the outer wall of the vermiculite carrier 4510 is slowly released through the micropores of the porous slow-release tube 458, the “desulfurized gypsum / fly ash-cow dung-bacterium agent” ternary cooperation is realized through the water and fertilizer system, the microorganism-soil-plant interaction process in the field ecological restoration is simulated, the active microorganism and the nutrient are continuously and stably released, the utilization efficiency and the colonization success rate of the bacterium agent are improved, a local high-activity microorganism “hot spot” is accurately constructed, the rhizosphere micro-ecological restoration and the nutrient circulation are strongly driven, the non-woven fabric 459 prevents the vermiculite carrier 4510 from leaking out, and the water and the root system can smoothly enter; After the test Leymus chinensis culture period ended, the aboveground part was cut off along the base of the stem, then the soil was poured out, the plant root system was gently taken out and the surface soil was shaken off, the root system was washed clean with distilled water, then the excess water was absorbed, 2 g of fibrous roots and 2 g of leaves were weighed and put into sterile self-sealing bags, immediately quick-frozen and stored in a-20℃ refrigerator; the rest of the aboveground part and the underground part of the plant were put into envelopes for biomass determination, then the detection machine 9 used inductive coupling plasma spectrometry, automatic nitrogen determination instrument method for total nitrogen determination, sodium bicarbonate extraction-molybdenum antimony anti-spectrophotometric method for detection and analysis of the content of heavy metals, total nitrogen, organic matter, available phosphorus, available potassium and slow-acting potassium in the sample, finally, the data processing end used 10 Microsoft Excel 2010 software to calculate and arrange the experimental data, used SPSS 23.0 software for single-factor and multi-factor variance analysis, the difference significance was defined as P<0.05; pearson correlation analysis was carried out, all data were the average values of 4 repeated tests, Origin 2021 was used for chart drawing, the change of heavy metal content, plant growth and physicochemical index analysis of fly ash and desulfurized gypsum in the process of ecological restoration of the mine pit were studied, and a new type of soil improvement technology was perfected.

[0042] Example five: Please refer toFigures 1-11 The mine area Leymus mollis vegetation reconstruction desulfurization gypsum fly ash experimental device and method of the present application, compared with example one, the present example includes the following steps: Step one: sampling; the staff collects mine tailings soil, fly ash, desulfurization gypsum by external equipment, uses ICP-MS, XRF method to detect the total amount of heavy metals, pH, salt content and nutrients in the above materials, and ensures that the pollutants in solid waste do not exceed the standard; Step two: mixing; mix the "tailings soil-desulfurization gypsum-fly ash" mixture by stirring mechanism 3 and weak direct current field mechanism 32 in proportion, get industrial solid waste, and compact it to 10 cm high; Step three: dry-wet-freezing coupling cycle; fill filter paper, 100 mesh nylon net, quartz sand with a height of 2 cm and washed and dried by ion water, 100 mesh nylon net, 10 cm high mine soil, 100 mesh nylon net, 10 cm high industrial solid waste in step two and filter paper from bottom to top in the external PVC aging column to realize the structure perfection of the external PVC aging column, and then the staff puts the PVC aging column in the air freezing and thawing test machine 8 to carry out dry-wet-freezing coupling cycle, wherein, dry heat period: 30°C, humidity 10%, lasting for 2 days, simulating summer; freezing period: -30°C, humidity 20%, lasting for 2 days, simulating winter; a total of 9 cycles, simulating about 5 years of natural weathering process in the local area, after the experiment, stratified sampling, respectively, determine the heavy metal content and form change of 10 cm high mine soil and 10 cm high industrial solid waste soil, and evaluate the pollution migration risk; Step four: treatment; the best desulfurization gypsum and fly ash addition amount is screened out by step three pretest, and 10 treatment levels are set according to the desulfurization gypsum and fly ash addition amount, and 4 parallel culture pots 7 are set in each treatment group, that is, the same proportion of soil and planting conditions are repeated 4 times, a total of 40 pots; Step five: mixing; put 3 kg of tailings soil, the best desulfurization gypsum addition amount screened out by step three pretest, the fly ash addition amount screened out by step three pretest and cow dung ash into the mixing box 2 respectively, and mix the above materials by stirring mechanism 3 and weak direct current field mechanism 32; Step six: test; select Leymus mollis as the test plant, the variety is drought-resistant, cold-resistant, wind-sand-resistant and barren-tolerant, soak the seeds in 10% hydrogen peroxide for 10 min, wash them with deionized water, put the uniform and full-grained seeds into a self-sealing bag, uniformly sow 100 seeds in each culture pot 7, and according to different groups, quantitatively weigh the step five mixture, and periodically water the Leymus mollis in the culture pot 7 by weighing method during the test, so that the added modifier maintains 75% of the maximum water holding capacity, and maintains light drought; Step seven: simulation; the sheep grass is beaten by the beating mechanism 4 to simulate the splashing of rainfall and animal touch, and the bacteria agent is slowly released through the release mechanism 45 to simulate the microorganism-soil-plant interaction process in the field ecological restoration; Step eight: sampling and determination; the test sheep grass is cut at the base of the stem, the soil is poured out, the plant root system is gently taken out and the surface soil is shaken off, the root system is washed clean with distilled water, the excess water is absorbed, 2g of fibrous roots and 2g of leaves are weighed and put into sterile self-sealing bags, immediately frozen and stored in a-20℃ refrigerator; the rest of the aboveground and underground plant parts are put into envelopes for biomass determination; Step nine: detection; the detection machine 9 adopts inductively coupled plasma mass spectrometry, automatic nitrogen determination instrument method for total nitrogen determination, sodium bicarbonate extraction-molybdenum antimony anti-spectrophotometric method for detection of heavy metals, total nitrogen, organic matter, available phosphorus, available potassium and slow-acting potassium in the sample; Step ten: test data processing; the experimental data is calculated and arranged by the data processing end 10 using Microsoft Excel 2010 software, single factor and multi-factor variance analysis is carried out by SPSS 23.0 software, the difference significance is defined as P<0.05; pearson correlation analysis is carried out, all data are the average value of 4 times of repetition, Origin 2021 is used for chart drawing, the change of heavy metal content, plant growth and physicochemical index analysis of fly ash and desulfurization gypsum in the process of ecological restoration of mine pit are studied, and the new soil improvement technology is improved.

[0043] The application provides a desulfurization gypsum fly ash experimental device and method for grassland vegetation reconstruction in a mining area, a stirring mechanism 3 is arranged, through rotation and movement of the two groups of weak direct current electric field mechanisms 32 and work of the ultrasonic atomizing nozzles 33, material agglomeration is broken, mixed dead angles are eliminated, uniformity of different proportioning substrates is accurately controlled, no dead angle infiltration is realized through the material, interface combination of minerals and organic matter and biological bacteria liquid is strengthened, substrate stability and nutrient availability are improved, and a uniform and high-activity mixed system is provided for ternary composite artificial soil construction; the weak direct current electric field mechanism 32 is arranged, electrode sheets 329 are used to promote “electro-induced assembly” of stable aggregates on a micro scale while realizing mechanical mixing, improve uniformity of the modifier distribution, accelerate the optimization and maturation process of the soil structure from the physical and chemical essence, and then realize the leap from “random mixing” to “accurate construction”; the beating mechanism 4 is arranged, the two groups of soft beating arms 44 beat the grassland in the culture pots 7, physical stress such as rainfall splashing and animal touch in the nature is simulated, a “contact form construction” physiological response of the plant is induced, the grassland stem is more robust, the root system is more developed, the ability of the seedling to resist lodging and wind erosion and overall toughness are improved in the seedling stage, and the survival adaptability of the seedling in the field is improved; the release mechanism 45 is arranged, the biological fertilizer bacteria in the vermiculite carrier 4510 adsorbed on the outer wall are slowly released through the porous slow-release pipe 458, the “desulfurization gypsum / fly ash-cow dung-bacteria” ternary collaborative supply is realized by cooperating with the water and fertilizer system, the microorganism-soil-plant interaction process in the field ecological restoration is simulated, active microorganisms and nutrients are continuously and stably released, the utilization efficiency and colonization success rate of the bacteria are improved, a local high-activity microorganism “hot spot” is accurately constructed, the rhizosphere micro-ecological restoration and nutrient circulation are strongly driven, meanwhile, the non-woven fabric 459 prevents the vermiculite carrier 4510 from leaking out, and water and the root system can smoothly enter.

[0044] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and the standard parts used in the present application can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional screw, rivet, welding and other conventional means in the prior art, the mechanical parts and equipment adopt the conventional types in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here.

[0045] The above description of disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mine area dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio 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experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for 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gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio gypsum fly ash experimental device for reestablishing dethio characterized in that ​ 2. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 1, characterized in that: The weak direct current electric field mechanism (32) includes the installation shell (321), the first installation box (31) is equipped with the installation shell (321) on both sides below, the top of the installation shell (321) is fixedly connected with the PLC controller (322), the lower left end in the installation shell (321) is fixedly connected with the microprogram-controlled direct current stabilized power supply (323), the right rear end and the right end center of the microprogram-controlled direct current stabilized power supply (323) are inserted with the cable (324), the bottom of the installation shell (321) is rotatably connected with the rotating shaft (325), the rotating shaft (325) penetrates three groups of connecting blocks (326) and is fixedly connected with the inside thereof, the upper part in the rotating shaft (325) is rotatably connected with the conductive slip ring (327), the left and right ends of the connecting block (326) are fixedly connected with the stirring paddle (328), the stirring paddle (328) is fixedly connected with the electrode sheet (329) inside, the bottom of the stirring paddle (328) is fixedly connected with the micro electric field intensity sensor (3210), the bottom of the stirring paddle (328) is fixedly connected with the micro temperature sensor (3211).

3. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 2, characterized in that: The beating mechanism (4) includes the air cylinder (41), the top of the mounting cover (1) is fixedly connected with the air cylinder (41), the bottom of the air cylinder (41) is fixedly connected with the second installation box (42), the front end of the second installation box (42) is slidably connected with two groups of sliding rods (43), the front end of the sliding rod (43) is fixedly connected with the soft beating arm (44), the right end of the second installation box (42) is fixedly connected with the release mechanism (45), the right end in the second installation box (42) is fixedly connected with the connecting seat (46), the bottom right end of the connecting seat (46) is fixedly connected with the fourth motor (47), the top output shaft of the fourth motor (47) is fixedly connected with the bottom right end of the second rotating block (48), the top left end of the second rotating block (48) is rotatably connected with the bottom front end of the second rotating rod (49), the bottom rear end of the second rotating rod (49) is rotatably connected with the matching rod (410), the bottom left and right ends of the matching rod (410) are rotatably connected with the second swing rod (411).

4. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 3, characterized in that: The release mechanism (45) comprises a third mounting box (451), the second mounting box (42) is fixedly connected with the third mounting box (451) at the right end, a mounting plate (452) is fixedly connected to the inner top of the third mounting box (451), a third motor (453) is fixedly connected to the upper back of the mounting plate (452), the output shaft at the front end of the third motor (453) is fixedly connected with the back right end of a first rotating block (454), a first swing rod (455) is rotatably connected to the left front end of the first rotating block (454), a sliding block (456) is rotatably connected to the lower back of the first swing rod (455), a second moving rod (457) is fixedly connected to the bottom of the sliding block (456), a porous slow-release tube (458) is inserted into the bottom of the second moving rod (457), non-woven fabrics (459) are adhesively connected to the left and right ends of the porous slow-release tube (458), a vermiculite carrier (4510) is filled in the porous slow-release tube (458), and a biological fertilizer agent is adsorbed to the outer wall of the vermiculite carrier (4510).

5. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 4, characterized in that: The back of the limiting plate (39) is fixedly connected with the inner back end of the first mounting box (31), and the bottom output shaft of the second motor (38) is fixedly connected with a mounting shell (321).

6. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 5, characterized in that: The inner gear top of the gear tooth plate piece (312) is rotatably connected with the bottom of the limiting plate (39), the inner tooth plate top of the gear tooth plate piece (312) is slidably connected with the bottom of the limiting plate (39), and the control switch (313) is electrically connected with the ultrasonic atomizing nozzle (33).

7. The desulfurized gypsum and fly ash experimental device for the reconstruction of a Leymus chinensis vegetation in a mining area according to claim 6, characterized in that: The top of the cable (324) at the right rear end of the micro-program-controlled direct-current stabilized power supply (323) is connected with the bottom of the PLC controller (322), the inner wall of the conductive slip ring (327) is connected with the cable (324) at the right end center of the micro-program-controlled direct-current stabilized power supply (323), the electrode sheet (329) is connected with the cable (324) at the right end center of the micro-program-controlled direct-current stabilized power supply (323), and the micro-electric field intensity sensor (3210) and the micro-temperature sensor (3211) are electrically connected with the PLC controller (322).

8. The desulfurized gypsum and fly ash experimental device for reestablishing a Leymus mollis vegetation in a mining area according to claim 7, characterized in that: The bottom right end of the second rotating block (48) is rotatably connected with the top right end of the connecting seat (46), and the bottom center of the second swing rod (411) is rotatably connected with the top of the connecting seat (46).

9. The desulfurized gypsum and fly ash experimental device for reestablishing a Leymus mollis vegetation in a mining area according to claim 8, characterized in that: The back right end of the first rotating block (454) is rotatably connected with the front end of the mounting plate (452), the outer wall of the sliding block (456) is slidably connected with the mounting plate (452), and the second moving rod (457) penetrates through the bottom of the mounting plate (452) and the bottom of the third mounting box (451) and is slidably connected with the interiors thereof.

10. A method for the experimental study of the re-vegetation of a mine area with Leymus chinensis using desulfurization gypsum and fly ash, for use with the experimental device according to claim 9, characterized in that: The method comprises the following steps: Step one: sampling; the staff collects mine tailings soil, fly ash, and desulfurization gypsum to be used by external equipment, uses ICP-MS and XRF methods to comprehensively detect the total amount of heavy metals, pH, salinity, and nutrients in the above-mentioned materials, and ensures that the pollutants in solid waste do not exceed the standard; Step two: mixing; mixing the "tailings soil-desulfurization gypsum-fly ash" mixture by the stirring mechanism (3) and the weak direct current electric field mechanism (32) to obtain industrial solid waste, and compacting it to 10 cm high; Step three: dry-wet-freezing coupling cycle; filling filter paper, 100 mesh nylon net, quartz sand with a height of 2 cm and washed by ionized water and dried, 100 mesh nylon net, 10 cm high mine soil, 100 mesh nylon net, 10 cm high industrial solid waste in step two and filter paper from bottom to top in the external PVC aging column to realize the structure perfection of the external PVC aging column, and then slowly saturating the PVC aging column to the predetermined humidity by capillary action, and then placing the PVC aging column in the air freezing and thawing test machine (8) to carry out dry-wet-freezing coupling cycle, wherein the dry heat period is 30°C, the humidity is 10%, and it lasts for 2 days to simulate summer, the frozen cold period is -30°C, the humidity is 20%, and it lasts for 2 days to simulate winter, and a total of 9 cycles are carried out to simulate about 5 years of natural weathering process in the local area, after the experiment is completed, layered sampling is carried out, and the heavy metal content and morphological change of 10 cm high mine soil and 10 cm high industrial solid waste soil are respectively measured to evaluate the migration risk of pollutants; Step four: treatment; screening the best desulfurization gypsum and fly ash addition amount through the pre-test of step three, and setting 10 treatment levels according to the desulfurization gypsum and fly ash addition amount, and setting 4 parallel culture pots (7) for each treatment group, that is, repeating 4 times under the same soil and planting conditions, a total of 40 pots; Step five: mixing; putting 3 kg of tailings soil, the best desulfurization gypsum addition amount screened out by the pre-test of step three, the fly ash addition amount screened out by the pre-test of step three, and cow dung ash into the mixing box (2) respectively, and mixing the above-mentioned materials by the stirring mechanism (3) and the weak direct current electric field mechanism (32); Step six: test; selecting Leymus chinensis as the test plant, which is drought-resistant, cold-resistant, wind-sand-resistant and barren-tolerant, soaking the seeds in 10% hydrogen peroxide for 10 min, cleaning them with deionized water, putting the uniform and full-grained seeds into a self-sealing bag, uniformly sowing 100 seeds in each culture pot (7), and quantitatively weighing the mixture of step five according to different groups in each culture pot (7), and periodically watering the culture pots (7) by weighing method during the test to keep the test added modifier at 75% of the maximum water holding capacity, and maintaining light drought; Step seven: simulation; simulating rainfall splashing and animal touching by patting the Leymus chinensis by the patting mechanism (4), and simulating the microorganism-soil-plant interaction process in the field ecological restoration by slowly releasing the microbial agent through the release mechanism (45); Step eight: sampling and determination; after the culture period of the test Leymus chinensis, cutting the above-ground part along the base of the stem, then pouring out the soil, gently taking out the plant roots and shaking off the surface soil, rinsing the roots with distilled water, then absorbing the excess water, weighing 2 g of fibrous roots and 2 g of leaves respectively into a sterile self-sealing bag, immediately freezing and then storing in a-20°C refrigerator; the rest of the above-ground and underground plants are put into envelopes for biomass determination; Step nine: detection; the detection machine (9) uses inductively coupled plasma mass spectrometry, automatic nitrogen determination of total nitrogen, sodium bicarbonate extraction-molybdenum antimony anti-spectrophotometric method to detect the content of heavy metals, total nitrogen, organic matter, available phosphorus, available potassium and slow-acting potassium in the sample; Step ten: test data processing; through the data processing end (10), the experimental data is calculated and arranged by using Microsoft Excel 2010 software, and single factor and multi-factor variance analysis is carried out by using SPSS 23.0 software, and the difference significance is defined as P<0.05; and pearson correlation analysis is carried out, all data are the average value of 4 times of repetition, and Origin 2021 is used for drawing chart, the change of heavy metal content, plant growth and physicochemical index analysis of fly ash and desulfurization gypsum in the process of ecological restoration of mine pit are studied, and the new soil improvement technology is improved.

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