A preparation device and method for preparing alkaline activator using gold tailings

Abstract

The invention relates to the technical field of geopolymer preparation, and discloses a preparation device and a preparation method for an alkali activator prepared by using gold tailings. The invention solves the problem in the existing geopolymer preparation process that, due to differences in the local mixing ratios of raw materials, the local compressive strength of the hardened geopolymer is uneven, thereby causing uneven stress distribution inside the geopolymer. Different raw materials are stored in partitions by a discharge box, ensuring that the total time for each raw material to leak through a spreading bottom plate tends to be consistent. Subsequently, the discharge box is rotated to make the leaked multiple raw materials fall evenly in a spiral shape on the upper surface of a material receiving component, thereby realizing automatic mixing of the raw materials according to a preset ratio, significantly improving the uniformity of the raw material mixing, and finally, through this uniform mixing method, significantly improving the overall compressive strength of the hardened geopolymer.

Description

Technical Field

[0001] The invention relates to the technical field of geopolymer preparation, in particular to a preparation device and a preparation method for preparing an alkali activator by utilizing gold tailings. Background Art

[0002] Long-term storage of tailings not only wastes land resources but also pollutes soil and groundwater. However, converting tailings into alkali-activated geopolymers (alkali activators) can achieve comprehensive resource utilization. Geopolymers are a ternary solid waste-based geopolymer made from iron tailings, gold tailings, and fly ash. The preparation process involves mixing the raw materials in a specific ratio and then adding a water glass solution to create the geopolymer product.

[0003] The compressive strength of geopolymers is closely related to the fly ash incorporation ratio. If fly ash is unevenly distributed within the iron ore and gold tailings raw materials, the local compressive strength of the hardened geopolymer will vary. Existing geopolymer mixing devices suffer from the following issues: The raw materials are granular and have poor fluidity. When pre-mixed according to the appropriate ratio, large deviations in the local mixing ratio are likely to occur, making uniform mixing difficult. This can lead to inconsistent local fly ash incorporation ratios. The uniformity of raw material mixing (i.e., the local fly ash incorporation ratio) directly affects the compressive strength of the geopolymer. When geopolymers are manufactured using raw materials with varying local mixing ratios, the local compressive strength of the hardened product will be inconsistent. Therefore, there is still significant room for improvement in raw material mixing methods. Summary of the Invention

[0004] The object of the present invention is to provide a preparation device and a preparation method for an alkali activator using gold tailings, thereby solving the problem in the existing geopolymer preparation process that, due to differences in the local mixing ratio of raw materials, the local compressive strength of the hardened geopolymer varies, thereby causing uneven stress distribution within the geopolymer.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a preparation device for preparing an alkaline activator using gold tailings, comprising a tank body and a stirring mechanism mounted on the upper side of the tank body, the stirring mechanism having a stirring rod extending into the inner side of the tank body, a mixing mechanism for storing multiple raw materials in partitions on the upper side of the tank body, a control system mounted on the tank body, the control system for controlling the mixing mechanism to mix the multiple raw materials while adding them into the tank body, and a water glass solution is pre-injected into the tank body;

[0006] The mixing mechanism includes a ring-shaped discharge box, which is rotatably assembled in the tank body. A plurality of movable baffles are provided on the inner side of the discharge box along the radial direction. The baffles divide the discharge box into a plurality of storage chambers with varying volumes. A spreading bottom plate for unloading is fixedly connected to the lower side of the discharge box, and a material receiving assembly for further mixing is provided under the spreading bottom plate.

[0007] As a further description of the above scheme: a rotating sealing door is provided on the lower surface of the material spreading base plate, and the corresponding first material discharge trough and second material discharge trough are respectively provided on the surface of the material spreading base plate and the sealing door. A limit block is fixed on the side of the sealing door, and a limit groove for movable assembly of the limit block is provided on the lower surface of the material spreading base plate.

[0008] As a further description of the above solution, the control system includes:

[0009] Servo motor, used to control the rotation of the discharge box;

[0010] Hydraulic push rod, used to adjust the position of the baffle plate;

[0011] Air hammer, used to vibrate the discharge box and receiving components;

[0012] A material height detection component, used to measure the material level height of the material storage cavity;

[0013] The material discharge control component is used to limit the sealing door position and control the opening or closing of the first material discharge chute;

[0014] The controller controls the coordination of the servo motor, hydraulic push rod, air hammer, material height detection component, and material discharge control component through electrical signals.

[0015] As a further description of the above solution: there are multiple air hammers, which are fixedly installed on the outer surface of the tank body, and the multiple air hammers are used to vibrate the discharge box and the material receiving assembly.

[0016] As a further description of the above scheme: the material height detection component includes a rotating rod rotatably installed on the side wall of the material baffle plate, an angle sensor is coaxially arranged on one side of the rotating axis of the rotating rod, a hollow ball is fixedly connected to the end of the rotating rod, and the side surface of the rotating rod is also provided with a U-shaped support foot to support it to tilt on the side of the material baffle plate.

[0017] As a further description of the above scheme: the hydraulic push rod is fixed on the tank body and installed at an angle, the output end of the hydraulic push rod extends obliquely downward and abuts against the side of the baffle plate, and two hydraulic push rods are symmetrically arranged.

[0018] As a further description of the above scheme: the servo motor is fixedly mounted on the surface of the tank body, the upper side of the discharge box is rotatably mounted on the inner side of the tank body through a bearing ring, the outer surface of the discharge box is provided with a gear ring, and the output end of the servo motor is provided with a gear, and the gear passes through the inner side of the tank body and engages with the gear ring.

[0019] As a further description of the above scheme: the unloading control component includes a rotating frame arranged below the sealing door, the rotating frame is rotatably mounted on the inner wall of the tank body, and an electric push rod is provided on the lower side of the rotating frame to push it to rotate upward, and the upper end of the electric push rod is provided with a friction rubber pad that is in friction contact with the lower surface of the sealing door.

[0020] As a further description of the above scheme: the material receiving assembly includes a mounting hoop fixedly mounted on the inner wall of the tank body, and a plurality of inclined material receiving inclined plates are circumferentially arranged on the inner side of the mounting hoop. The material receiving inclined plates are rotatably mounted on the inner side of the mounting hoop through eccentric rods at both ends. The eccentric rod is arranged on a side deviating from the center line of the material receiving inclined plate, and one end of the eccentric rod is provided with a torsion spring for elastically limiting it.

[0021] A method for preparing an alkali activator using gold tailings, the preparation steps comprising:

[0022] S1: First, put the prepared water glass solution with appropriate volume into the tank, and then weigh the preset masses of various raw materials respectively;

[0023] S2: Next, the prepared raw materials are put into different storage chambers, and the control system is started to automatically control the mixing of the various raw materials and the water glass solution;

[0024] S3: Then, the control system controls the various raw materials to leak out through the spreading bottom plate in the discharge box, and the leakage time tends to be consistent. Synchronously, the discharge box is started to rotate, and the stirring rod is started to rotate;

[0025] S4: Multiple raw materials fall onto the surface of the receiving ramp in a spiral shape and are stacked layer by layer in a preset proportion to form a mixed raw material mixed in a preset proportion. The mixed raw material then slides down the surface of the receiving ramp and gradually falls into the tank body to be fully mixed with the water glass solution;

[0026] S5: Finally, the stirred geopolymer slurry is discharged through the discharge port at the lower side of the tank body, and the discharge box and the baffle plate are restored to their positions in the tank body.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. Different raw materials are stored in separate areas through the discharge box to ensure that the total time for each raw material to leak through the spreading bottom plate is consistent. Then, through the rotating discharge box, the leaked multiple raw materials fall evenly on the upper surface of the receiving component in a spiral shape, realizing automatic mixing of the raw materials according to the preset ratio, which significantly improves the uniformity of the raw material mixing. Ultimately, through this uniform mixing method, the overall compressive strength of the hardened geopolymer is significantly improved.

[0029] 2. During the mixing process, the material receiving assembly can gradually and evenly feed the raw materials into the tank body, so that they are fully contacted and mixed with the water glass solution. Through this arrangement, on the one hand, the raw materials are gradually and evenly added during the process of being fed into the tank body, and it is not easy to form a coating layer, thereby avoiding the problem of uneven mixing caused by the coating layer and ensuring sufficient contact and reaction between the raw materials and the water glass solution; on the other hand, the raw material addition process and the mixing process of the water glass solution are carried out simultaneously. This integrated operation mode greatly shortens the entire mixing time, improves mixing efficiency, and ensures mixing quality, providing a more uniform and efficient raw material mixing basis for the subsequent preparation of geopolymers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of the tank body of the present invention from a side view;

[0032] Figure 3 This is a schematic diagram of the tank top structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the internal structure of the tank body of the present invention from a top view;

[0034] Figure 5 For the present invention Figure 4 A is an enlarged schematic diagram;

[0035] Figure 6 It is a schematic diagram of the tank structure of the present invention;

[0036] Figure 7 Schematic diagram of the mixing mechanism structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the split structure of the lower side of the mixing mechanism of the present invention;

[0038] Figure 9 This is a schematic structural diagram of the material feeding control assembly of the present invention;

[0039] Figure 10 It is a structural schematic diagram of the material splicing assembly of the present invention;

[0040] Figure 11 For the present invention Figure 10 A magnified schematic diagram of middle B;

[0041] Figure 12 It is a structural schematic diagram of the material height detection component of the present invention.

[0042] In the figure: 10, tank body; 20, stirring mechanism; 21, stirring rod; 30, mixing mechanism; 31, discharge box; 311, gear ring; 312, bearing ring; 32, material baffle; 33, material spreading bottom plate; 331, first material discharge chute; 332, limit groove; 34, sealing door; 341, second material discharge chute; 342, limit block; 35, material receiving assembly; 351, mounting hoop; 352, material receiving inclined plate; 353, eccentric rod; 354, torsion spring; 40, control system; 41, controller; 42, servo motor; 43, hydraulic push rod; 44, air hammer; 45, material height detection assembly; 451, rotating rod; 452, angle sensor; 453, hollow ball; 454, U-shaped support foot; 46, material discharge control assembly; 461, rotating frame; 462, friction rubber pad; 463, electric push rod. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0045] Iron tailings, gold tailings, and fly ash all contain varying proportions of silica and alumina, which provide the necessary silicon and aluminum sources for geopolymer preparation. These react with a water glass solution to produce a large amount of gel-like substances, forming a NASH system and a dense structure, which imparts high compressive strength to the geopolymer. The average particle sizes of these three raw materials vary significantly: iron tailings are approximately 516 microns, gold tailings are approximately 286 microns, and fly ash is approximately 52 microns. The small particle size of fly ash allows it to fill in the gaps between the iron tailings and gold tailings, further enhancing the hardness of the geopolymer.

[0046] Adding fly ash in varying proportions to a 1:1 mass ratio of iron ore and gold tailings yielded geopolymers with varying compressive strengths. The compressive strength of the geopolymer increased with increasing fly ash content, ranging from 30.9 MPa to 58 MPa, a wide range.

[0047] The compressive strength of hardened geopolymer is not only affected by the difference in the local mixing ratio of raw materials, but also by the raw material coating layer formed when the raw materials are mixed with water glass solution. The greater the proportion of the raw material coating layer in the geopolymer, the lower the compressive strength of the hardened geopolymer will be.

[0048] In the prior art, when mixing the mixed raw materials with the water glass solution, the water glass solution is directly added to the mixed raw materials. This can lead to inconsistent chemical reaction rates in local areas. Some of the mixed raw materials that come into contact with the water glass solution first will react first, then form a spherical structure during stirring. The raw materials that have completely reacted on the outer surface will encapsulate the unreacted raw materials inside, forming a raw material encapsulation layer. This layer is difficult to break apart during subsequent continuous stirring. When this raw material encapsulation layer is mixed into the interior of the hardened geopolymer, it will cause the compressive strength of the geopolymer to decrease. (Gel-like substances in the water glass solution will encapsulate the unreacted raw materials, causing local oversaturation. The gel will deposit on the surface of the glass phase to form an encapsulation layer, hindering the continued reaction. The unreacted raw materials and the gel-like product together constitute the NASH system.) Therefore, improving the mixing uniformity of the mixed raw materials and the water glass solution and reducing the phenomenon of raw materials forming an encapsulation layer can further improve the compressive coefficient of the hardened geopolymer. (The improvement in the compressive coefficient of geopolymers enables them to withstand higher water pressure and complex geological stresses in the construction of key projects such as dams, significantly enhancing the overall stability and disaster resistance of the project. It avoids the deformation of geopolymers with low compressive coefficients when the building structure is subjected to large loads (such as the water pressure of the dam, the deadweight of the building, etc.), causing local collapse and endangering the structural stability of the entire project).

[0049] Combine Figures 1-12 A preparation device for preparing an alkaline activator using gold tailings includes a tank body 10 and a stirring mechanism 20 mounted on the upper side of the tank body 10. The stirring mechanism 20 has a stirring rod 21 extending into the inner side of the tank body 10. A mixing mechanism 30 for storing multiple raw materials in partitions is provided on the upper side of the tank body 10. The tank body 10 is equipped with a control system 40. The control system 40 is used to control the mixing mechanism 30 to mix the multiple raw materials while adding them into the tank body 10. The tank body 10 is pre-injected with a water glass solution.

[0050] The mixing mechanism 30 includes a ring-shaped discharge box 31, which is rotatably assembled in the tank body 10. A plurality of movable baffles 32 are arranged on the inner side of the discharge box 31 along the radial direction. The baffles 32 divide the discharge box 31 into a plurality of storage chambers with varying volumes. A spreading bottom plate 33 for unloading is fixedly connected to the lower side of the discharge box 31. A receiving assembly 35 for further mixing is provided below the spreading bottom plate 33. Before the discharge box 31 spreads the material, the baffle 32 is first moved to adjust the height of the raw materials in the storage chamber to a preset height, and then the rotating discharge box 31 spirally spreads the various raw materials onto the sealing door 34. Finally, the sealing door 34 gradually and evenly spreads the mixed various raw materials into the tank body 10.

[0051] Furthermore, first, the various raw materials that have been accurately weighed are put into their respective storage cavities, and the pre-configured water glass solution is injected into the tank body 10. Due to the differences in the particle sizes of different raw materials, their natural stacking heights in the storage cavity are different. At this time, by adjusting the position of the baffle plate 32, the effective volume of the storage cavity can be changed, so that the various raw materials reach the same stacking height in the corresponding storage cavity, thereby ensuring that the time for these raw materials to leak out through the spreading bottom plate 33 is consistent.

[0052] Subsequently, during the rotation of the discharge box 31, the raw materials leak out from the material spreading bottom plate 33 and fall evenly on the upper surface of the material receiving assembly 35 in a spiral shape. At this time, multiple raw materials will be stacked layer by layer. Since the total time for the raw materials to leak is consistent, the ratio of the raw materials stacked layer by layer is the preset precise ratio. Then, the material receiving assembly 35 sprinkles the stacked multiple raw materials into the tank body 10. The water glass solution in the tank body is stirred by the rotating stirring rod 21, thereby achieving gradual and uniform mixing of the raw materials and the water glass solution, significantly improving the uniformity of the mixing, and effectively reducing the phenomenon of the raw materials forming a wrapped layer.

[0053] Furthermore, compared with the existing mixing device, when mixing the raw materials, on the one hand, the local mixing ratio of the raw materials varies greatly, which easily leads to different local compressive strengths of the hardened geopolymer; on the other hand, the mixing method of the raw materials and the water glass solution easily produces more raw material wrapping layers, which further affects the compressive strength of the hardened geopolymer.

[0054] The present invention's device, through the aforementioned method, achieves precise mixing of the raw materials according to a preset ratio, improving the uniformity of the raw material mixing and thereby enhancing the overall compressive strength of the geopolymer. The material receiving assembly 35 then gradually distributes the overlapping multiple raw materials into the tank 10, uniformly mixing the raw materials with the water glass solution. This significantly improves the uniformity of the reaction and reduces the formation of a coating on the raw materials. When fewer coatings are formed by the stirred raw materials, the compressive strength of the resulting geopolymer is significantly improved.

[0055] Furthermore, the mixing of the raw materials and the mixing of the raw materials with the water glass solution is carried out simultaneously. Compared with the traditional method of mixing the raw materials first and then mixing with the water glass solution, this synchronous mixing method greatly reduces the overall mixing time and improves production efficiency.

[0056] Combine Figure 7-Figure 8 A rotating sealing door 34 is provided on the lower surface of the material spreading bottom plate 33, and corresponding first material discharge trough 331 and second material discharge trough 341 are respectively opened on the surface of the material spreading bottom plate 33 and the sealing door 34. A limit block 342 is fixedly provided on the side of the sealing door 34, and a limit groove 332 for movable assembly of the limit block 342 is opened on the lower surface of the material spreading bottom plate 33.

[0057] The limiting block 342 moves inside the limiting groove 332. When they are at the extreme positions at both ends, the first discharge chute 331 and the second discharge chute 341 will be connected or misaligned, thereby further controlling the opening and closing of the material discharging bottom plate 33; when adjusting the material level in the material storage chamber, the material discharging bottom plate 33 is adjusted to a closed state through the sealing door 34 to prevent leakage. After the adjustment is completed, when mixing the raw materials, the material discharging bottom plate 33 can be opened to discharge the materials.

[0058] Combine Figures 1-12 The control system 40 includes a servo motor 42 for controlling the rotation of the discharge box 31, a hydraulic push rod 43 for adjusting the position of the material baffle 32, an air hammer 44 for vibrating the discharge box 31 and the material receiving assembly 35, a material height detection assembly 45 for measuring the material level height of the storage chamber, and a material discharge control assembly 46 for controlling the opening or closing of the first discharge chute 331 by limiting the position of the sealing door 34. It also includes a controller 41 that uses electrical signals to control the coordinated cooperation of the servo motor 42, the hydraulic push rod 43, the air hammer 44, the material height detection assembly 45, and the material discharge control assembly 46.

[0059] There are multiple air hammers 44, which are fixedly installed on the outer surface of the tank body 10. The multiple air hammers 44 are used to vibrate the discharge box 31 and the material receiving assembly 35. The setting of the air hammers 44 facilitates increasing the flow effect of the raw materials on the discharge box 31 and the material receiving assembly 35. Furthermore, the air hammers 44 that vibrate the material receiving assembly 35 can be replaced with vibrators, which is also applicable.

[0060] The material height detection assembly 45 includes a rotating rod 451 rotatably mounted on the side wall of the material baffle 32. An angle sensor 452 is coaxially mounted on one side of the rotating axis of the rotating rod 451. A hollow ball 453 is fixedly connected to the end of the rotating rod 451. The side surface of the rotating rod 451 is also provided with a U-shaped support foot 454 that supports the rotating rod 451 to tilt against the side of the material baffle 32. Due to the provision of the U-shaped support foot 454, the rotating rod 451 forms a certain angle with the surface of the material baffle 32. The design of the U-shaped support foot 454 ensures that the rotating rod 451 maintains a moderate tilt (preferably an angle of 45°-60°) in its initial state, rather than being completely vertical. This ensures that when the hollow ball 453 moves upward during vibration, the supporting resistance exerted by the rotating rod 451 (the supporting force exerted by the rotating rod 451 on the hollow ball 453 along its length) is relatively small, effectively avoiding the supporting resistance caused by the vertical state, thereby ensuring the smooth movement of the hollow ball 453.

[0061] Furthermore, in the initial state, multiple baffles 32 are evenly spaced around the inner side of the discharge box 31. Different raw materials are placed into each storage chamber, and the air hammer 44 is activated to vibrate the discharge box 31. Due to their low density, the hollow balls 453 embedded in the raw materials naturally float to the upper surface of the raw materials during vibration, similar to a ping-pong ball buried in sand. This difference in density causes the hollow balls 453 to rotate the connected rotating rod 451 to a certain angle (the rotating rod 451 is lightweight, such as a carbon fiber rod). The rotation angle of the rotating rod 451 is then measured by an angle sensor 452. Using trigonometric calculations, the height of the corresponding raw material within the storage chamber can be calculated. The volume of the raw materials is then calculated based on the stacking height of the raw materials in each storage chamber. The time it takes for the various raw materials to escape through the spreading base 33 is then calculated based on the raw material volumes. Finally, according to these leakage times, the position of the material blocking plate 32 is adjusted so that the leakage area of ​​the material spreading bottom plate 33 is reasonably distributed to the various raw materials, so that the time for the various raw materials to finally leak through the material spreading bottom plate 33 is consistent.

[0062] It should be noted that while the height at which hollow ball 453 rises to the surface of the raw material during vibration can be used to estimate the raw material's bulk height, the depth of this immersion may affect the estimated result. However, this error has a minimal impact on the overall raw material volume calculation and is almost negligible.

[0063] The hydraulic push rod 43 is fixed on the tank body 10 and is installed at an angle. The output end of the hydraulic push rod 43 extends obliquely downward and abuts against the side of the baffle plate 32. Two hydraulic push rods 43 are symmetrically provided.

[0064] Furthermore, in the process of adjusting the position of the baffle plate 32 by the hydraulic push rod 43, the baffle plate 32 to be adjusted is first moved to the bottom of the two hydraulic push rods 43, and the two hydraulic push rods 43 are used to clamp and fix the baffle plate 32. Then, under the combined action of the servo motor 42 driving the discharge box 31 to rotate and the air hammer 44 vibrating the discharge box 31, the baffle plate 32 moves in the discharge box 31, thereby changing the height of the raw materials.

[0065] It should be noted that when the baffle plates 32 rotate within the discharge box 31, a certain amount of friction exists between them and the inner wall of the discharge box 31. This friction ensures that when the hydraulic push rod 43 controls the movement of one baffle plate 32, the other baffle plates 32 will not be displaced due to the squeezing of the raw materials. The initial position of the baffle plates 32 relative to the tank body 10 is fixed. This design allows the servo motor 42 to precisely control the rotation of the discharge box 31 and accurately move the baffle plates 32 below the operating area of ​​the hydraulic push rod 43. After a single mixing operation of the raw materials, the hydraulic push rod 43 restores the displaced baffle plates 32 to their original position relative to the inside of the tank body 10. This facilitates the next measurement of the raw material volume and allows the servo motor 42 to accurately move the baffle plates 32 below the hydraulic push rod 43 again.

[0066] The servo motor 42 is fixedly mounted on the surface of the tank body 10, and the upper side of the discharge box 31 is rotatably mounted on the inner side of the tank body 10 through the bearing ring 312. A gear ring 311 is provided on the outer surface of the discharge box 31, and a gear is provided at the output end of the servo motor 42. The gear passes through the inner side of the tank body 10 and engages with the gear ring 311. The rotation of the discharge box 31 is precisely controlled by the servo motor 42.

[0067] The unloading control assembly 46 includes a rotating frame 461 arranged below the sealing door 34. The rotating frame 461 is rotatably installed on the inner wall of the tank body 10. An electric push rod 463 is provided on the lower side of the rotating frame 461 to push it to rotate upward. The upper end of the electric push rod 463 is provided with a friction rubber pad 462 that is in friction contact with the lower surface of the sealing door 34.

[0068] When the servo motor 42 controls the rotation of the discharge box 31, the electric push rod 463 is synchronously controlled to prompt the rotating frame 461 to support the friction rubber pad 462 upward to frictionally contact the lower surface of the sealing door 34, prompting the sealing door 34 to rotate relative to the material spreading bottom plate 33, thereby connecting the first discharge chute 331 with the second discharge chute 341. Similarly, by rotating the discharge box 31 in the opposite direction, the friction rubber pad 462 is also frictionally contacted with the lower surface of the sealing door 34, so that the first discharge chute 331 and the second discharge chute 341 can be dislocated.

[0069] Combine Figure 7 、 Figure 10-11The material receiving assembly 35 includes a mounting hoop 351 fixedly mounted on the inner wall of the tank body 10, and a plurality of inclined material receiving inclined plates 352 are circumferentially arranged on the inner side of the mounting hoop 351. The material receiving inclined plates 352 are rotatably mounted on the inner side of the mounting hoop 351 through eccentric rods 353 at both ends. The eccentric rod 353 is arranged on a side deviating from the center line of the material receiving inclined plates 352, and a torsion spring 354 is provided at one end of the eccentric rod 353 to elastically limit it.

[0070] Furthermore, the plurality of circumferentially arranged material receiving inclined plates 352 are connected end to end in a top view, and the inclination direction of the eccentric rod 353 is the same as the spiral direction of the raw material spirally descending. This design allows the raw material to be smoothly laid onto the upper surface of the material receiving inclined plates 352;

[0071] The various raw materials spirally dispersed from the discharge box 31 are laid out on the inclined surface of the receiving ramp 352 in a predetermined proportion. Under the action of the air hammer 44 vibrating the receiving ramp 352, the raw materials slide smoothly along the inclined surface into the tank body 10 and mix with the water glass solution. Because the raw materials slide down the surface of the receiving ramp 352 in a continuous process, the raw materials mixed in the predetermined proportions are gradually and evenly mixed with the water glass solution and stirred, thereby greatly improving the mixing uniformity of the raw materials and the water glass solution and reducing the occurrence of the raw materials forming a layer of coating.

[0072] It is worth mentioning that the material receiving inclined plate 352 is eccentrically rotated and installed on the inner side of the mounting hoop 351 through the eccentric rod 353, and is elastically supported by the torsion spring 354 to maintain its inclination. When the raw materials on the surface of the material receiving inclined plate 352 slide down too slowly, resulting in an increase in the amount of accumulation, the weight of the accumulated raw materials will automatically increase the inclination of the material receiving inclined plate 352, thereby accelerating the sliding rate of the raw materials on the surface of the inclined plate, and effectively avoiding excessive accumulation of raw materials on the surface of the material receiving inclined plate 352.

[0073] A method for preparing an alkali activator using gold tailings, the preparation steps comprising:

[0074] S1: First, a prepared water glass solution of appropriate volume is put into the tank 10, and then various raw materials of preset mass are weighed respectively;

[0075] S2: Next, the prepared raw materials are put into different storage chambers respectively, and the control system 40 is started, and the control system 40 automatically controls the mixing of the various raw materials and the water glass solution;

[0076] S3: Then, the control system 40 controls the various raw materials to leak out of the discharge box 31 through the spreading bottom plate 33, and the leaking time tends to be consistent. Synchronously, the discharge box 31 is started to rotate, and the stirring rod 21 is started to rotate;

[0077] S4: The various raw materials fall onto the upper surface of the receiving ramp 352 in a spiral shape and are stacked layer by layer in a preset ratio to form a mixed raw material mixed in a preset ratio. The mixed raw material then slides down the surface of the receiving ramp 352 and gradually falls into the tank body 10 to be fully mixed with the water glass solution.

[0078] S5: Finally, the stirred geopolymer slurry is discharged through the discharge port at the lower side of the tank body 10, and at the same time, the discharge box 31 and the baffle plate 32 are restored to their positions relative to the tank body 10 cavity.

[0079] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A preparation device for preparing an alkaline activator using gold tailings, comprising a tank body (10) and a stirring mechanism (20) mounted on the upper side of the tank body (10), wherein the stirring mechanism (20) has a stirring rod (21) extending to the inner side of the tank body (10), characterized in that: A mixing mechanism (30) for storing a plurality of raw materials in partitions is provided on the upper side of the tank body (10). A control system (40) is mounted on the tank body (10). The control system (40) is used to control the mixing mechanism (30) to mix the plurality of raw materials while feeding them into the tank body (10). The tank body (10) is pre-injected with a water glass solution. The mixing mechanism (30) includes a ring-shaped discharge box (31), the discharge box (31) is rotatably assembled in the tank body (10), a plurality of movable baffle plates (32) are provided on the inner side of the discharge box (31) along the radial direction, the baffle plates (32) divide the discharge box (31) into a plurality of storage chambers with varying volumes, a material spreading bottom plate (33) for discharging materials is fixedly connected to the lower side of the discharge box (31), and a material receiving assembly (35) for further mixing materials is provided below the material spreading bottom plate (33); The control system (40) includes: A servo motor (42) for controlling the rotation of the discharge box (31); A hydraulic push rod (43) for adjusting the position of the baffle plate (32); An air hammer (44) for vibrating the discharge box (31) and the material receiving assembly (35); A material height detection component (45) is used to measure the material level height of the material storage cavity; A material discharge control component (46) is used to limit the position of the sealing door (34) and control the opening or closing of the first material discharge chute (331); The controller (41) controls the coordination of the servo motor (42), the hydraulic push rod (43), the air hammer (44), the material height detection component (45), and the material discharge control component (46) through electrical signals; The air hammers (44) are provided in plurality and fixedly mounted on the outer surface of the tank body (10), and the plurality of air hammers (44) are used to vibrate the discharge box (31) and the material receiving assembly (35); The material height detection component (45) includes a rotating rod (451) rotatably mounted on the side wall of the material blocking plate (32), an angle sensor (452) is coaxially arranged on one side of the rotating axis of the rotating rod (451), a hollow ball (453) is fixedly connected to the end of the rotating rod (451), and a U-shaped support foot (454) is further provided on the side surface of the rotating rod (451) to support it to be tilted on the side of the material blocking plate (32); The material receiving assembly (35) comprises a mounting hoop (351) fixedly mounted on the inner wall of the tank body (10); a plurality of inclined material receiving inclined plates (352) are circumferentially arranged on the inner side of the mounting hoop (351); the material receiving inclined plates (352) are rotatably mounted on the inner side of the mounting hoop (351) via eccentric rods (353) at both ends; the eccentric rods (353) are arranged on a side deviating from the center line of the material receiving inclined plates (352); and a torsion spring (354) for elastically limiting the eccentric rods (353) is provided at one end.

2. A preparation device for preparing an alkali activator using gold tailings according to claim 1, characterized in that: A rotating sealing door (34) is provided on the lower surface of the material spreading bottom plate (33), and corresponding first material discharge troughs (331) and second material discharge troughs (341) are respectively provided on the surfaces of the material spreading bottom plate (33) and the sealing door (34). A limiting block (342) is fixedly provided on the side of the sealing door (34), and a limiting groove (332) for movably assembling the limiting block (342) is provided on the lower surface of the material spreading bottom plate (33).

3. A preparation device for preparing an alkali activator using gold tailings according to claim 1, characterized in that: The hydraulic push rod (43) is fixed on the tank body (10) and is installed at an angle. The output end of the hydraulic push rod (43) extends obliquely downward and abuts against the side of the baffle plate (32). Two hydraulic push rods (43) are symmetrically arranged.

4. A preparation device for preparing an alkali activator using gold tailings according to claim 1, characterized in that: The servo motor (42) is fixedly mounted on the surface of the tank body (10), the upper side of the discharge box (31) is rotatably mounted on the inner side of the tank body (10) via a bearing ring (312), a gear ring (311) is provided on the outer surface of the discharge box (31), and a gear is provided at the output end of the servo motor (42), and the gear penetrates the inner side of the tank body (10) and meshes with the gear ring (311).

5. A preparation device for preparing an alkali activator using gold tailings according to claim 1, characterized in that: The unloading control assembly (46) includes a rotating frame (461) arranged below the sealing door (34), the rotating frame (461) is rotatably mounted on the inner wall of the tank body (10), and an electric push rod (463) is provided on the lower side of the rotating frame (461) to push it to rotate upward, and a friction rubber pad (462) is provided on the upper end of the electric push rod (463) to frictionally contact the lower surface of the sealing door (34).

6. A method for preparing an alkali activator by using gold tailings, applied to the preparation device for preparing an alkali activator by using gold tailings according to any one of claims 1 to 5, characterized in that: The preparation steps include: S1: First, a prepared water glass solution with a suitable volume is put into the tank (10), and then various raw materials with preset masses are weighed respectively; S2: Next, the prepared raw materials are respectively put into different storage chambers, and the control system (40) is started, and the control system (40) automatically controls the mixing of the various raw materials and the water glass solution; S3: Then, the control system (40) controls the various raw materials to leak out from the discharge box (31) through the spreading bottom plate (33), and the leaking time tends to be consistent. In synchronization, the discharge box (31) is started to rotate, and the stirring rod (21) is started to rotate; S4: The various raw materials fall onto the upper surface of the receiving inclined plate (352) in a spiral shape and are stacked layer by layer in a preset ratio to form a mixed raw material mixed in a preset ratio. The mixed raw material then slides down the surface of the receiving inclined plate (352) and gradually falls into the tank body (10) to be fully mixed with the water glass solution. S5: Finally, the stirred geopolymer slurry is discharged through the discharge port at the lower side of the tank body (10), and at the same time, the discharge box (31) and the baffle plate (32) are restored to their positions in the tank body (10).

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