Preparation method of lithium mica smelting slag-based low-carbon cementitious material and stirring device

Abstract

The application provides a preparation method and a stirring device of lithium mica smelting slag-based low-carbon cementitious material, and relates to the field of low-carbon cementitious material preparation. The preparation method of the lithium mica smelting slag-based low-carbon cementitious material comprises the following steps: S1, pretreatment: sequentially performing drying, crushing and grinding treatment on lithium mica smelting slag; S2, mixing: uniformly mixing lithium slag, cement clinker, fly ash and an activator according to a proportion to obtain a mixture, wherein the lithium slag is 30-70 parts, the cement clinker is 15-60 parts, the fly ash is 5-30 parts, and the activator is 1-10 parts. The preparation method of the lithium mica smelting slag-based low-carbon cementitious material provided by the application can dissociate the inert crystal phase of lithium slag through mechanical grinding, and can be supplemented by a multi-element composite activation system of cement clinker, fly ash and an activator, so that the pozzolanic activity of silicon dioxide and aluminum oxide in the lithium slag is improved, the limitation of a low lithium slag content is effectively broken, and efficient solid waste disposal and high-value utilization of low-carbon building materials are realized.

Description

Technical Field

[0001] This invention relates to the field of low-carbon cementitious material preparation, and in particular to a method for preparing a lithium mica smelting slag-based low-carbon cementitious material and a stirring device. Background Technology

[0002] In lithium extraction from lithium ore, approximately 30 to 60 tons of lithium smelting slag are generated for every ton of lithium carbonate produced. This slag contains a large amount of SiO2 and Al2O3, and has potential cementing activity.

[0003] However, the existing technology has the following problems: 1. Lithium slag exists in stable crystalline phases such as anorthite, and the activity of volcanic ash is poor, so the lithium slag content is generally less than 35%; 2. Traditional alkali activation is costly, has high alkalinity, slow gelation, and is easy to carbonize, making it difficult to fix harmful components and thus difficult to apply in engineering; 3. Poor adaptability of mixing equipment: traditional cement mortar mixers are not capable of uniformly mixing high-content lithium slag materials; there is still room for improvement in how to achieve high-content, low-cost preparation of low-carbon building materials from lithium slag.

[0004] Therefore, it is necessary to provide a method for preparing low-carbon cementitious materials based on lithium mica smelting slag and a stirring device to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a method and stirring device for preparing low-carbon cementitious materials based on lithium mica smelting slag, which solves the problem that there is still room for improvement in how to achieve high-content and low-cost preparation of low-carbon building materials from lithium slag.

[0006] To solve the above-mentioned technical problems, the present invention provides a method for preparing a low-carbon cementitious material based on lithium mica smelting slag, comprising the following steps:

[0007] S1. Pretreatment: The lepidolite smelting slag is dried, crushed, and ground in sequence.

[0008] S2. Mixing: Mix lithium slag, cement clinker, fly ash and activator evenly according to the proportion to obtain a mixture, wherein the lithium slag is 30-70 parts, the cement clinker is 15-60 parts, the fly ash is 5-30 parts and the activator is 1-10 parts.

[0009] S3. Molding: Add the mixture into the mixing device, then add water to the mixing device and stir evenly to make a clean slurry;

[0010] S4. Curing: Under standard curing conditions, the material is cured to the specified age to obtain lithium mica smelting slag-based cementitious material.

[0011] Preferably, the specific surface area of ​​the pretreated lepidolite smelting slag in S1 is 200-700 m² / kg.

[0012] Preferably, the activator is one or more of sodium bisulfite, trisodium phosphate, sodium acetate, sodium lignosulfonate, triethanolamine, and sodium sulfate.

[0013] Preferably, the curing period in S4 is 2-60 days.

[0014] The present invention also provides a stirring device for use in step S3 of the preparation method of the lithium mica smelting slag-based low-carbon cementitious material;

[0015] Includes: chassis;

[0016] A lifting platform, which is mounted on the chassis;

[0017] A mixing cylinder, comprising a cylinder body, a drive sleeve, and an assembly column, wherein the drive sleeve is sleeved on the cylinder body and forms a sliding key engagement with the cylinder body, and the assembly column is disposed at the bottom end of the cylinder body, and the cylinder body is detachably installed on the lifting end of the lifting platform via the assembly column;

[0018] A connecting slave component is provided at the top of the drive sleeve, and a connecting master component is installed on the chassis above the connecting slave component;

[0019] A stirring assembly, used to stir and mix the materials inside the mixing cylinder;

[0020] A feeding assembly for adding the mixture into the mixing cylinder.

[0021] Preferably, the lifting platform includes a lifting cylinder, a mounting platform, and an assembly tube. The lifting cylinder is mounted on the chassis, the mounting platform is mounted on the bottom output end of the lifting cylinder, the assembly tube is rotatably mounted on the mounting platform, and the assembly column is detachably mounted inside the assembly tube.

[0022] Preferably, the stirring assembly includes a stirring element, a rotating shaft, and a driven gear. The rotating shaft is rotatably mounted on the upper end of the housing, the stirring element is mounted on the bottom end of the rotating shaft, and the driven gear is mounted on the rotating shaft.

[0023] The stirring device also includes a driving device, which includes a drive motor and a main gear. The drive motor is installed inside the housing, and the output end of the drive motor passes through the housing and is fixedly connected to the main gear. The main gear meshes with the driven gear.

[0024] The inner wall of the drive sleeve is provided with a toothed assembly. When the lifting platform raises the mixing cylinder to a preset height, so that the stirring element is located inside the mixing cylinder, the toothed assembly meshes with the main gear.

[0025] Preferably, the feeding assembly includes a feeding cylinder and a discharge structure. The feeding cylinder is installed on the chassis, and the bottom conveying pipe of the feeding cylinder passes through the upper end of the chassis and is suspended above the inlet of the mixing cylinder.

[0026] The feeding structure includes a rotating tube, a driving gear, and a feeding screw. The rotating tube is rotatably installed at the bottom end of the output tube of the feeding cylinder. The feeding screw is fixed inside the rotating tube by a support rod, and the top end of the feeding screw extends into the feeding cylinder. The driving gear is installed on the rotating tube, and the tooth groove of the driving gear is aligned with the teeth in the tooth set.

[0027] Preferably, the assembly column has a fixing hole, and the assembly tube has a through mounting hole.

[0028] Preferably, the chassis is vertically mounted with a slide rail, and the mounting platform is slidably connected to the slide rail.

[0029] Compared with related technologies, the preparation method and stirring device of lithium mica smelting slag-based low-carbon cementitious material provided by the present invention have the following beneficial effects:

[0030] This invention provides a method for preparing low-carbon cementitious materials based on lithium mica smelting slag. This process involves mechanically grinding to dissociate the inert crystalline phase of lithium slag, and supplementing it with a multi-component composite activation system including cement clinker, fly ash, and activators to enhance the pozzolanic activity of silica and alumina in the lithium slag. This effectively overcomes the limitation of low lithium slag content and significantly reduces the utilization of industrial smelting waste. The mixture is hydrated with water to generate calcium silicate hydrate (CSH) gel and calcium aluminosilicate hydrate (CASH) gel, which have dense internal pores, preventing air and moisture intrusion, inhibiting carbonization reactions, and reducing leaching risks. This method not only significantly reduces industrial waste and lowers production energy consumption and costs, demonstrating outstanding low-carbon and environmental benefits, but also exhibits excellent comprehensive mechanical and durability properties, making it widely adaptable to various engineering applications and achieving efficient solid waste disposal and high-value utilization of low-carbon building materials. Attached Figure Description

[0031] Figure 1 A flowchart illustrating the steps of the method for preparing a lithium mica smelting slag-based low-carbon cementitious material provided by the present invention.

[0032] Figure 2 This is a schematic diagram of the structure of the stirring device provided by the present invention;

[0033] Figure 3 for Figure 2 A schematic diagram of the stirring device from an overhead angle;

[0034] Figure 4 A partial cross-sectional view of the stirring device provided by the present invention;

[0035] Figure 5 A cross-sectional schematic diagram of the mixing cylinder provided by the present invention;

[0036] Figure 6 This is a schematic diagram of the working state of the drive sleeve provided by the present invention, wherein, Figure 6 (a) is a schematic diagram showing the state in which one side of the drive gear meshes with the main gear and the other side meshes with the drive gear. Figure 6 (b) is a schematic diagram showing the state of engagement between the drive gear meshing teeth and the main gear and disengagement between the drive gear and the drive gear.

[0037] Figure 7 This is a schematic diagram of the working state of the stirring component provided by the present invention, wherein, Figure 7 Image (a) is a schematic diagram of the agitator in the stirring state. Figure 7 (b) is a schematic diagram of the agitator in a clean state.

[0038] Numbering on the map:

[0039] 1. Chassis; 11. Support plate; 12. Slide rail; 13. Connecting components;

[0040] 2. Lifting platform; 21. Lifting cylinder; 22. Mounting platform; 23. Assembly pipe; 24. Fixing pin;

[0041] 3. Stirring assembly; 31. Stirring component; 32. Rotating shaft; 33. Gear;

[0042] 4. Mixing cylinder; 41. Cylinder body; 42. Drive sleeve; 43. Assembly column;

[0043] 411. Handle; 421. Tooth assembly; 422. Connecting component; 431. Fixing hole;

[0044] 5. Feeding assembly; 51. Feeding cylinder; 52. Discharge structure; 521. Rotating tube; 522. Drive gear; 523. Discharge screw;

[0045] 6. Drive unit; 61. Drive motor; 62. Main gear;

[0046] 7. Machine door. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] This invention provides a method for preparing a low-carbon cementitious material based on lithium mica smelting slag.

[0049] Please refer to the following: Figure 1 In one embodiment of the present invention, the preparation method of the lithium mica smelting slag-based low-carbon cementitious material includes the following steps:

[0050] S1. Pretreatment: The lepidolite smelting slag is dried, crushed, and ground in sequence.

[0051] S2. Mixing: Mix lithium slag, cement clinker, fly ash and activator evenly according to the mass ratio to obtain a mixture, wherein the lithium slag is 30-70 parts, the cement clinker is 15-60 parts, the fly ash is 5-30 parts and the activator is 1-10 parts.

[0052] S3. Molding: Add the mixture into the mixing device, then add water to the mixing device and stir evenly to make a clean slurry;

[0053] S4. Curing: Under standard curing conditions, the material is cured to the specified age to obtain lithium mica smelting slag-based cementitious material.

[0054] The lithium slag in S2 is the lepidolite smelting slag pretreated in S1.

[0055] The mixture of lithium slag, cement clinker, fly ash, and activator is formulated in the following proportions: lithium slag 30%~60%, cement 20%~50%, fly ash 10%~30%, composite activator 1%~8%, and additives 1%~5%.

[0056] This process mechanically grinds and dissociates the inert crystalline phase of lithium slag (corresponding to step S1, where lepidolite smelting slag is dried, crushed, and ground sequentially), and supplements it with a multi-component composite activation system consisting of cement clinker, fly ash, and activators (corresponding to step S2, where lithium slag, cement clinker, fly ash, and activators are mixed evenly). This enhances the pozzolanic activity of silica and alumina in the lithium slag, effectively overcoming the limitation of low lithium slag content and significantly reducing the utilization of industrial smelting waste. The mixture is then hydrated with water to generate hydrated calcium silicate (CSH) gel and hydrated calcium aluminosilicate (CASH) gel (corresponding to step S3, where the mixture is added to a stirring device and reacted with water). This process densifies the internal pores, prevents air and moisture intrusion, inhibits carbonization reactions, and reduces leaching risks. It not only significantly utilizes industrial waste, reduces production energy consumption and costs, and has outstanding low-carbon and environmental benefits, but also exhibits excellent comprehensive mechanical and durability properties, making it widely adaptable to various engineering application scenarios and achieving efficient solid waste disposal and high-value utilization of low-carbon building materials.

[0057] Furthermore, the mixture, when combined with water, will hydrate to generate microcrystalline fillers that help to compact the internal pores, prevent air and moisture from entering, and inhibit the carbonization reaction. In addition, CSH gel, CASH gel, and various microcrystals interlock and intertwine to form a three-dimensional network gel skeleton, which seals the harmful components in lithium slag through a dual action of physical encapsulation and chemical bonding, effectively inhibiting the leaching of harmful substances.

[0058] The microcrystalline filler includes tricalcium aluminate in cement clinker interacting with trace amounts of sulfate and water to form ettringite (AFt) microcrystalline filler; lithium slag and fly ash activated by mechanical grinding of active silica and active alumina undergo a continuous pozzolanic reaction under alkaline conditions created by calcium hydroxide, gradually generating hydrated calcium aluminosilicate (CASH) microcrystalline and gel phases, as well as refined calcium hydroxide, etc.

[0059] Among them, volcanic ash active refers to powdered silica-alumina material containing active silica and active alumina, which can undergo a hydration reaction with calcium hydroxide (strong alkaline environment) at room temperature to generate hydration products (CSH, CASH gel) with gelling ability and continuously generate strength.

[0060] In lithium slag, active SiO2\Al2O3+Ca (OH)2→CSH / CASH continuously forms a dense structure and improves later strength; where C=CaO, S=SiO2, A=Al2O3, H=H2O;

[0061] The activator alkali destroys the lithium slag structure, and sulfate generates ettringite, which accelerates hydration and optimizes the pore structure. Hydration generates CSH gel + ettringite + calcium hydroxide, forming a dense hardened body with a strength of 32.5~42.5 MPa. The lithium slag content is 30%~60%, which disposes of smelting waste and reduces carbon emissions (40%~60% lower than cement).

[0062] It can replace some cement and be used in beams, columns, wall panels, floors, and road base layers.

[0063] Precast components: blocks, insulation boards, curb stones, reducing costs and being low-carbon and environmentally friendly.

[0064] Repair material: fast-setting and early-strength, used for emergency repairs of roads / structures;

[0065] Wall materials: non-load-bearing blocks, insulated partition boards, lightweight, high-strength, and heat-insulating materials.

[0066] As an optional method in this embodiment, sand can also be added in S3 to generate mortar; the mixing process is as follows: low speed 20s~50s → sand addition low speed 30s~60s → high speed 25~55s → stop 80~100s → high speed 40~70s.

[0067] Preferably, the specific surface area of ​​the pretreated lepidolite smelting slag in S1 is 200-700 m² / kg.

[0068] Preferably, the activator is one or more of sodium bisulfite, trisodium phosphate, sodium acetate, sodium lignosulfonate, triethanolamine, and sodium sulfate.

[0069] It uses a compound of commonly used industrial sodium salts and alcohol amine auxiliaries, which are readily available and have lower costs, avoiding the high material costs of traditional strong alkalis; sodium bisulfite and sodium acetate form a buffer system to neutralize excess free alkali, reduce overall alkalinity, reduce alkali corrosion and efflorescence, and at the same time alleviate carbonization rate.

[0070] The curing period for S4 is 2-60 days.

[0071] The standard curing process involves static and sealed curing of specimens at an ambient temperature of 20±2℃ and a relative humidity of ≥95% to ensure stable hydration reaction. The preferred curing period is 28 days, which is mainly based on GB / T 50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete". In addition, the project acceptance is in accordance with GB 50204-2015 "Code for Acceptance of Construction Quality of Concrete Structures".

[0072] The present invention also provides a stirring device for mixing and stirring the solid mixture with water in step S3 of the preparation method of the lithium mica smelting slag-based low carbon cementitious material; of course, it can also be used to mix other mixed powders with water or other solutions, such as the preparation of mortar by mixing the mixture, water and sand in the present invention.

[0073] Please see Figures 2 to 4 The stirring device includes: a housing 1;

[0074] Lifting platform 2, which is mounted on the housing 1;

[0075] The mixing cylinder 4 includes a cylinder body 41, a drive sleeve 42, and an assembly column 43. The drive sleeve 42 is sleeved on the cylinder body 41 and forms a sliding key engagement with the cylinder body 41. The assembly column 43 is disposed at the bottom end of the cylinder body 41. The cylinder body 41 is detachably installed on the lifting end of the lifting platform 2 through the assembly column 43.

[0076] The top of the drive sleeve 42 is provided with a connecting slave 422, and a connecting master 13 is installed on the chassis 1 above the connecting slave 422;

[0077] A stirring assembly 3 is used to stir and mix the materials inside the mixing cylinder 4.

[0078] Feeding component 5, which is used to add the mixture into the mixing cylinder 4.

[0079] The mixing equipment provided by this invention is mainly used in small-scale production scenarios, such as laboratories.

[0080] During operation, the mixing drum 4 is installed on the lifting end of the lifting platform 2. The lifting platform 2 raises the mixing drum 4 so that the stirring end of the stirring component 3 is located inside the mixing drum 4. Then, the material is added into the mixing drum 4 using the feeding component 5. Next, clean water is added, and the stirring component 3 works to mix the material and water evenly to make a clean slurry.

[0081] Then, the drive sleeve 42 is moved upward, connecting the top connecting part 422 of the drive sleeve 42 to the connecting main part 13 on the casing 1, thus limiting the drive sleeve 42. Then, the lifting platform 2 lowers the mixing cylinder 4, gradually separating the mixing cylinder 4 from the stirring end of the stirring assembly 3. The stirring end of the stirring assembly 3 separates from the material, but the stirring end of the stirring assembly 3 remains inside the drive sleeve 42. Figure 7 (a) and Figure 7 In step (b), the mixing component 3 operates, causing the slurry attached to the mixing end to be thrown off by the centrifugal force generated by the rotation and into the drive sleeve 42. After a preset rotation time, the connecting slave part 422 is separated from the connecting master part 13, and then the drive sleeve 42 is lowered and put back on the cylinder 41. The material thrown onto the inner wall of the drive sleeve 42 is scraped off by the top of the cylinder 41 and falls into the cylinder 41. By setting the drive sleeve 42, a large amount of slurry attached to the mixing component 3 can be avoided from dripping down after the mixing cylinder 4 is directly removed from the lifting platform 2, which would cause waste and troublesome cleaning later.

[0082] The inner wall of the top of the cylinder 41 is set as an inclined surface, which makes it easier to scrape the material off and prevents the material from accumulating at the top of the cylinder 41. When a small amount of material accumulates, the staff can sweep it into the cylinder 41.

[0083] The stirring end of the stirring component 3 can be disassembled for further fine cleaning.

[0084] Next, the mixing cylinder 4 is removed from the lifting platform 2, and the mixture is poured out for subsequent steps.

[0085] When the rotating stirring component 3 is centrifugally ejecting the material attached to it, it is preferable to rotate for 5 to 15 seconds; and this can be done multiple times.

[0086] Preferably, handles 411 are symmetrically arranged on the cylinder 41, so that the mixing cylinder 4 can be moved easily by using the handles 411.

[0087] In one embodiment, the connecting slave component 422 is an arc-shaped metal sheet, installed at the top of the drive sleeve 42, and the connecting master component 13 consists of multiple magnetic blocks, correspondingly installed at the top of the inner cavity of the housing 1 and arranged correspondingly to the arc-shaped metal sheet. The arc-shaped metal sheet can be attracted to the magnetic blocks, and the connection between the drive sleeve 42 and the housing 1 is achieved by magnetic attraction.

[0088] In another embodiment, the main connector 13 and the slave connector 422 are male and female fasteners, and multiple fasteners are provided. The main connector 13 is a male fastener installed on the top of the inner wall of the chassis 1, and the slave connector 422 is a female fastener installed on the top of the drive sleeve 42.

[0089] Please see Figure 1 In this embodiment, the lifting platform 2 includes a lifting cylinder 21, a mounting platform 22, and an assembly tube 23. The lifting cylinder 21 is mounted on the housing 1, the mounting platform 22 is mounted on the bottom output end of the lifting cylinder 21, the assembly tube 23 is rotatably mounted on the mounting platform 22, and the assembly column 43 is detachably mounted inside the assembly tube 23.

[0090] The assembly column 43 at the bottom of the cylinder 41 is inserted into the assembly tube 23 and detachably installed. During lifting, the lifting cylinder 21 lifts the mounting platform 22, and the mounting platform 22 drives the mixing cylinder 4 to move upward, thus realizing the function of lifting the mixing cylinder 4.

[0091] The lifting cylinder 21 can be a pneumatic cylinder, a hydraulic cylinder, or an electric push cylinder.

[0092] The bottom of the casing 1 is also equipped with a support plate 11. When the lifting platform 2 descends to its lowest point, the support plate 11 supports the mounting platform 22. A support (not shown) can be slidably mounted on the support plate 11. When the mounting platform 22 drives the mixing cylinder 4 to rise to a preset height for mixing, the support can be moved to support the bottom of the mounting platform 22, thereby reducing the load on the lifting cylinder 21.

[0093] In other embodiments, the lifting cylinder 21 can be replaced with a winch, chain lifting device, etc.

[0094] Please see Figure 2 and Figure 3 In this embodiment, the stirring assembly 3 includes a stirring element 31, a rotating shaft 32, and a driven gear 33. The rotating shaft 32 is rotatably mounted on the upper end of the housing 1, the stirring element 31 is mounted on the bottom end of the rotating shaft 32, and the driven gear 33 is mounted on the rotating shaft 32.

[0095] The stirring device also includes a driving device 6, which includes a driving motor 61 and a main gear 62. The driving motor 61 is installed inside the housing 1. The output end of the driving motor 61 passes through the housing 1 and is fixedly connected to the main gear 62. The main gear 62 meshes with the driven gear 33.

[0096] The inner wall of the drive sleeve 42 is provided with a toothed assembly 421. When the lifting platform 2 raises the mixing cylinder 4 to a preset height, so that the stirring element 31 is located inside the mixing cylinder 4, the toothed assembly 421 meshes with the main gear 62.

[0097] By setting a toothed assembly 421 on the top of the inner wall of the drive sleeve 42, an internal toothed ring is formed at the top of the drive sleeve 42; when the mixing cylinder 4 is assembled with the mounting platform 22, the tooth groove of the toothed assembly 421 is aligned with one side of the tooth of the main gear 62.

[0098] Thus, when the lifting platform 2 raises the mixing cylinder 4 to the preset height, and the stirring component 31 is located inside the mixing cylinder 4, the tooth assembly 421 meshes with the main gear 62;

[0099] During mixing, the drive motor 61 drives the main gear 62 to rotate. The main gear 62 drives the rotating shaft 32 to rotate via the driven gear 33, thereby driving the stirring component 31 to rotate. The rotating stirring component 31 stirs the material. At the same time, the main gear 62 meshes with the tooth assembly 421, driving the drive sleeve 42 to rotate. The drive sleeve 42 drives the cylinder 41 to rotate accordingly. The assembly column 43 drives the assembly tube 23 to rotate. The rotation direction of the cylinder 41 is opposite to the rotation direction of the stirring component 31, forming countercurrent forced stirring, which significantly improves the stirring efficiency and material uniformity. The finished product performance is stable and controllable, and the drive sleeve 42 is fully utilized.

[0100] When the connecting slave part 422 on the drive sleeve 42 is connected to the connecting master part 13, the tooth set 421 is separated from the main gear 62; the drive motor 61 rotates an integer number of revolutions each time, which facilitates subsequent assembly and keeps the connecting slave part 422 and the connecting master part 13 aligned for easy assembly.

[0101] Among them, the sliding key connection between the drive sleeve 42 and the cylinder 41 is as follows: Figure 5 Multiple strip-shaped protrusions are arranged circumferentially on the outer surface of the cylinder 41. Correspondingly, rectangular cavities are provided on the drive sleeve 42, which are fitted onto the strip-shaped protrusions to form a sliding key connection. The material scraped off by the strip-shaped protrusions can be swept away or pushed into the interior of the cylinder 41 by the staff.

[0102] The drive motor 61 is a geared motor or a servo motor, or a gear reducer is installed at the output end of the drive motor 61. The gear reducer is a planetary gear reducer or a worm gear reducer, and its reduction ratio is 5:1 to 20:1.

[0103] The mixing component 31 includes a central shaft and mixing blades located on both sides of the central shaft. The central shaft is detachably connected to the rotating shaft 32. Disassembly facilitates cleaning and maintenance of the mixing component 31. The connection method can be a threaded connection or a bolt or nut connection.

[0104] In other embodiments, a separate rotary motor can be provided to drive the assembly tube 23 to rotate, thereby driving the mixing cylinder 4 to rotate. In this case, the output end of the drive motor 61 can be directly connected to the rotating shaft 32 to drive the stirring component 31 to rotate. In this case, the toothed assembly 421 is not provided inside the drive sleeve 42.

[0105] Please see Figure 4 In this embodiment, the feeding assembly 5 includes a feeding cylinder 51 and a feeding structure 52. The feeding cylinder 51 is installed on the housing 1. The bottom feeding pipe of the feeding cylinder 51 passes through the upper end of the housing 1 and is suspended above the inlet of the mixing cylinder 4.

[0106] The feeding structure 52 includes a rotating tube 521, a driving gear 522, and a feeding screw 523. The rotating tube 521 is rotatably installed at the bottom end of the output pipe of the feeding cylinder 51. The feeding screw 523 is fixed inside the rotating tube 521 by a support rod, and the top end of the feeding screw 523 extends into the feeding cylinder 51. The driving gear 522 is installed on the rotating tube 521, and the tooth groove of the driving gear 522 is aligned with the teeth in the tooth assembly 421.

[0107] The lifting cylinder 21 lifts the mounting platform 22, causing the lifting mixing cylinder 4 to move upward. When one side of the toothed assembly 421 meshes with the main gear 62, and the other side of the toothed assembly 421 meshes with the driving gear 522, the mixture is added into the feeding cylinder 51. The drive motor 61 starts, and the main gear 62 and the toothed assembly 421 drive the driving gear 522 to rotate. The driving gear 522 drives the rotating tube 521 to rotate, thereby driving the feeding screw 523 located inside to rotate. The feeding screw 523 mixes the mixture inside the feeding cylinder 51 and feeds it into the mixing cylinder 4.

[0108] Preferably, the thickness of the main gear 62 is not less than twice the thickness of the teeth of the tooth set 421. For example... Figure 6 In (a), when the feeding screw 523 is driven to feed material, one side of the tooth assembly 421 meshes with the lower half of the main gear 62, and the other side meshes with the drive gear 522;

[0109] like Figure 6 In step (b), after the material is unloaded, the lifting platform 2 continues to lift the mixing cylinder 4, so that the tooth assembly 421 meshes with the upper part of the main gear 62, and at the same time separates from the driving gear 522, so that the driving gear 522 will not be driven to rotate again.

[0110] Thus, the drive device 6 can drive the stirring element 31 and the mixing cylinder 4 to rotate in opposite directions to achieve rapid mixing in one state; in another state, it can drive the stirring element 31 alone to work with the drive sleeve 42 to clean the stirring element 31 using centrifugal force; in yet another state, it can drive the feeding screw 523 to rotate to achieve uniform feeding; and the switching between states can be achieved by using the lifting platform 2 to lift the mixing cylinder 4.

[0111] For the connection between the connecting slave component 422 and the connecting master component 13, the lifting platform 2 can be used to lift the mixing cylinder 4 to move the driving sleeve 42 upward, so that the connecting slave component 422 and the connecting master component 13 can be assembled; or the worker can push the driving sleeve 42 upward to assemble the connecting slave component 422 and the connecting master component 13.

[0112] A valve can be installed at the bottom of the feeding cylinder 51 to connect to the conveying pipe. The top of the feeding screw 523 is located below the valve plate in the valve. The valve plate can block or open the bottom of the feeding cylinder 51 by moving horizontally.

[0113] Preferably, a positioning component can be provided to limit the rotation direction of the rotating tube 521, preventing the driving gear 522 from deflecting after the tooth assembly 421 separates from the driving gear 522, thus affecting subsequent assembly. The positioning component includes a mounting plate, a positioning pin, and a nut. The nut is pre-installed in the mounting plate, which is fixed to the housing 1 and adjacent to the rotating tube 521. The positioning pin passes through the nut and is threadedly connected to it. A positioning tube is horizontally installed on the rotating tube 521, initially aligned with the positioning pin. By tightening the positioning pin, its end is inserted into the positioning tube, thus limiting the rotation of the rotating tube 521.

[0114] In other embodiments, a drive motor, a drive gear, and a mounting bracket may also be provided. The drive motor is mounted on the housing 1 via the mounting bracket, and the drive gear is mounted on the output shaft of the drive motor. The drive gear meshes with the drive gear 522. The drive motor drives the drive gear to rotate, thereby driving the drive gear 522 to rotate, so as to realize the rotation of the feeding screw 523 for feeding.

[0115] Please see Figure 2 and Figure 4 As an optional embodiment, the assembly column 43 is provided with a fixing hole 431, and the assembly tube 23 is provided with a through mounting hole.

[0116] After the assembly column 43 is inserted into the assembly tube 23, the fixing hole 431 is aligned with the mounting hole. Then, the fixing pin 24 is used to pass through the mounting hole and the fixing hole 431. Finally, the nut is used to connect the threaded end of the fixing pin 24 to achieve a detachable connection between the assembly column 43 and the assembly tube 23.

[0117] After assembly, one side of the tooth assembly 421 is aligned with the main gear 62, and the other side is aligned with the drive gear 522.

[0118] As another optional method in this embodiment, a square shaft can be provided in the assembly tube 23, and a square groove can be opened at the bottom of the assembly column 43. The assembly shaft and the assembly column 43 are fitted on the square shaft using the square groove to form a detachable assembly; thus, when the cylinder 41 rotates, it can drive the assembly tube 23 to rotate as well.

[0119] Please see Figure 2 As a preferred embodiment of this example, a slide rail 12 is vertically mounted on the chassis 1, and the mounting platform 22 is slidably connected to the slide rail 12.

[0120] By using the slide rail 12 and the mounting platform 22 to limit movement in the horizontal direction, the stability during lifting is improved.

[0121] Among them, such as Figure 1 A door 7 is also hinged to one side of the casing 1. Closing the door 7 protects the mixing assembly 3 and the lifting platform 2.

[0122] The chassis 1 is also equipped with a control panel and control switch, which are used to set the stirring program and start or stop the drive motor 61, lifting cylinder 21 and other drive equipment.

[0123] The working principle of the stirring device provided by this invention is as follows:

[0124] During operation, the mixing drum 4 is installed on the lifting end of the lifting platform 2. The lifting platform 2 raises the mixing drum 4 so that the stirring end of the stirring component 3 is located inside the mixing drum 4. Then, the material is added into the mixing drum 4 using the feeding component 5. Next, clean water is added, and the stirring component 3 works to mix the material and water evenly to make a clean slurry.

[0125] Then the drive sleeve 42 can be moved upwards, connecting the top connecting part 422 of the drive sleeve 42 to the connecting main part 13 on the housing 1, thus limiting the drive sleeve 42. Then the lifting platform 2 lowers the mixing cylinder 4, gradually separating the mixing cylinder 4 from the stirring end of the stirring assembly 3. The stirring end of the stirring assembly 3 separates from the material, but the stirring end of the stirring assembly 3 remains inside the drive sleeve 42. Figure 7 (a) and Figure 7In step (b), the mixing component 3 operates, causing the slurry attached to the mixing end to be thrown off by the centrifugal force generated by the rotation and into the drive sleeve 42. After a preset rotation time, the connecting slave part 422 is separated from the connecting master part 13, and then the drive sleeve 42 is lowered and put back on the cylinder 41. The material thrown onto the inner wall of the drive sleeve 42 is scraped off by the top of the cylinder 41 and falls into the cylinder 41. By setting the drive sleeve 42, a large amount of slurry attached to the mixing component 3 can be avoided from dripping down after the mixing cylinder 4 is directly removed from the lifting platform 2, which would cause waste and troublesome cleaning later.

[0126] The lifting cylinder 21 lifts the mounting platform 22, causing the lifting mixing cylinder 4 to move upward. When one side of the toothed assembly 421 meshes with the main gear 62, and the other side of the toothed assembly 421 meshes with the driving gear 522, the mixture is added into the feeding cylinder 51. The drive motor 61 starts, and the main gear 62 and the toothed assembly 421 drive the driving gear 522 to rotate. The driving gear 522 drives the rotating tube 521 to rotate, thereby driving the feeding screw 523 located inside to rotate. The feeding screw 523 mixes the mixture inside the feeding cylinder 51 and feeds it into the mixing cylinder 4.

[0127] Preferably, the thickness of the main gear 62 is not less than twice the thickness of the teeth of the tooth set 421. For example... Figure 6 In (a), when the feeding screw 523 is driven to feed material, one side of the tooth assembly 421 meshes with the lower half of the main gear 62, and the other side meshes with the drive gear 522;

[0128] like Figure 6 In step (b), after the material is unloaded, the lifting platform 2 continues to lift the mixing cylinder 4, so that the tooth assembly 421 meshes with the upper part of the main gear 62, and at the same time separates from the driving gear 522, so that the driving gear 522 will not be driven to rotate again.

[0129] When the connecting slave part 422 on the drive sleeve 42 is connected to the connecting master part 13, the tooth assembly 421 is separated from the main gear 62;

[0130] Thus, the drive device 6 can drive the stirring element 31 and the mixing cylinder 4 to rotate in opposite directions to achieve rapid mixing in one state; in another state, it can drive the stirring element 31 alone to work with the drive sleeve 42 to clean the stirring element 31 using centrifugal force; in yet another state, it can drive the feeding screw 523 to rotate to achieve uniform feeding; and the switching between states can be achieved by using the lifting platform 2 to lift the mixing cylinder 4.

[0131] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for preparing a low-carbon cementitious material based on lithium mica smelting slag, characterized in that, Includes the following steps: S1. Pretreatment: The lepidolite smelting slag is dried, crushed, and ground in sequence. S2. Mixing: Mix lithium slag, cement clinker, fly ash and activator evenly according to the proportion to obtain a mixture, wherein the lithium slag is 30-70 parts, the cement clinker is 15-60 parts, the fly ash is 5-30 parts and the activator is 1-10 parts. S3. Molding: Add the mixture to the mixing device, then add water to the mixing device and stir evenly to make a clean slurry; S4. Curing: Under standard curing conditions, the material is cured to the specified age to obtain lithium mica smelting slag-based cementitious material.

2. The method for preparing the lithium mica smelting slag-based low-carbon cementitious material according to claim 1, characterized in that, The specific surface area of ​​the pretreated lepidolite smelting slag in S1 is 200-700 m² / kg.

3. The method for preparing the lithium mica smelting slag-based low-carbon cementitious material according to claim 1, characterized in that, The activator is one or more of sodium bisulfite, trisodium phosphate, sodium acetate, sodium lignosulfonate, triethanolamine, and sodium sulfate.

4. The method for preparing the lithium mica smelting slag-based low-carbon cementitious material according to claim 1, characterized in that, The curing period for S4 is 2-60 days.

5. A stirring device, characterized in that, Used in step S3 of the method for preparing the lithium mica smelting slag-based low-carbon cementitious material as described in any one of claims 1-3; Includes: chassis; A lifting platform, which is mounted on the chassis; A mixing cylinder, comprising a cylinder body, a drive sleeve, and an assembly column, wherein the drive sleeve is sleeved on the cylinder body and forms a sliding key engagement with the cylinder body, and the assembly column is disposed at the bottom end of the cylinder body, and the cylinder body is detachably installed on the lifting end of the lifting platform via the assembly column; The top of the drive sleeve is provided with a connecting slave component, and a connecting master component is installed on the chassis above the connecting slave component; A stirring assembly, used to stir and mix the materials inside the mixing cylinder; A feeding assembly for adding the mixture into the mixing cylinder.

6. The stirring device according to claim 5, characterized in that, The lifting platform includes a lifting cylinder, a mounting platform, and an assembly tube. The lifting cylinder is mounted on the chassis, the mounting platform is mounted on the bottom output end of the lifting cylinder, the assembly tube is rotatably mounted on the mounting platform, and the assembly column is detachably mounted inside the assembly tube.

7. The stirring device according to claim 6, characterized in that, The stirring assembly includes a stirring element, a rotating shaft, and a driven gear. The rotating shaft is rotatably mounted on the upper end of the casing, the stirring element is mounted on the bottom end of the rotating shaft, and the driven gear is mounted on the rotating shaft. The stirring device also includes a driving device, which includes a drive motor and a main gear. The drive motor is installed inside the housing, and the output end of the drive motor passes through the housing and is fixedly connected to the main gear. The main gear meshes with the driven gear. The inner wall of the drive sleeve is provided with a toothed assembly. When the lifting platform raises the mixing cylinder to a preset height, so that the stirring element is located inside the mixing cylinder, the toothed assembly meshes with the main gear.

8. The stirring device according to claim 7, characterized in that, The feeding assembly includes a feeding cylinder and a feeding structure. The feeding cylinder is installed on the chassis, and the bottom conveying pipe of the feeding cylinder passes through the upper end of the chassis and is suspended above the inlet of the mixing cylinder. The feeding structure includes a rotating tube, a driving gear, and a feeding screw. The rotating tube is rotatably installed at the bottom end of the output tube of the feeding cylinder. The feeding screw is fixed inside the rotating tube by a support rod, and the top end of the feeding screw extends into the feeding cylinder. The driving gear is installed on the rotating tube, and the tooth groove of the driving gear is aligned with the teeth in the tooth set.

9. The stirring device according to claim 6, characterized in that, The assembly column has a fixing hole, and the assembly tube has a through mounting hole.

10. The stirring device according to claim 6, characterized in that, The chassis is vertically mounted with slide rails, and the mounting platform is slidably connected to the slide rails.

Images