A method for purifying water resources using a lithium-berylite production lithium carbonate impurity-removed material

Abstract

The application provides a method for purifying water resources by using lithium feldspar production lithium carbonate impurity-removed material, relates to the technical field of water resource purification, and comprises the following steps: step S1, pretreatment of the impurity-removed material, drying the lithium feldspar production lithium carbonate impurity-removed material to generate dried material; and step S2, grinding and crushing the dried material by using a ball mill to generate ground material. The scheme finally realizes the resource utilization of the lithium feldspar production lithium carbonate impurity-removed material, reduces waste emissions, reduces the dependence on new resources, and conforms to the sustainable development concept; compared with traditional water purifying agents, the composite water purifying agent is prepared by using waste materials, the raw material cost is greatly reduced, the water purification process is simplified, the energy consumption is reduced, and the overall water resource purification cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a method for using the purified lithium carbonate material produced from spodumene for water purification. Background Technology

[0002] In the face of increasingly severe global water shortages and water pollution problems, developing efficient and low-cost water purification technologies is crucial. Traditional water purification methods often suffer from high costs, complex processes, and secondary pollution. In contrast, water purification agents, which are added to water and react with other impurities, primarily serve the purpose of water purification, offering simple manufacturing processes, low cost, and high purification capabilities.

[0003] In the process of producing lithium carbonate from spodumene, a large amount of material is generated after impurity removal with sodium carbonate and sodium hydroxide. Currently, most of these materials are discarded or simply disposed of, which wastes resources and may pollute the environment. Therefore, how to utilize the material after impurity removal in the production of lithium carbonate from spodumene to prepare a usable water purification agent is a problem that needs further research.

[0004] Therefore, it is necessary to provide a method for using the purified lithium carbonate produced from spodumene for water purification, in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention provides a method for using the purified material from lithium carbonate produced by spodumene for water purification, which solves the problem in related technologies where the preparation of a usable water purification agent from the purified material from lithium carbonate produced by spodumene requires further research.

[0006] To solve the above-mentioned technical problems, the present invention provides a method for using the purified lithium carbonate material produced from spodumene for water purification, comprising the following steps:

[0007] Step S1, Pretreatment of materials after impurity removal: The materials after impurity removal from spodumene to lithium carbonate are dried to generate dried material;

[0008] Step S2: Grind and pulverize the dried material using a ball mill to generate grinding material;

[0009] Step S3, high-temperature calcination: the grinding material is placed in a calcination device for calcination treatment to generate calcined material;

[0010] Step S4, mixing: The calcined material is mixed with polyaluminum chloride and polyacrylamide in a certain proportion. After thorough mixing, an appropriate amount of water is added to make a suspension.

[0011] Step S5: The suspension is made into a granular composite water purification agent by spray drying process.

[0012] Preferably, the particle size in step S2 is 50-100 mesh.

[0013] Preferably, the calcination temperature in step S3 is 500-600℃.

[0014] Preferably, the calcination time in step S3 is 2-3 hours.

[0015] Preferably, in step S4, the calcined material accounts for 30-40%, polyaluminum chloride accounts for 40-50%, and polyacrylamide accounts for 10-20%.

[0016] Preferably, the calcination equipment includes:

[0017] Calcination apparatus;

[0018] A shielding cover is fitted over one end of the calcining device;

[0019] A storage silo, which is installed above the other end of the calcining device;

[0020] A docking cover is fixedly installed at the bottom of the storage silo and sleeved on the other end of the calcining device; a connecting pipe and a discharge pipe are respectively provided at the top and bottom of the docking cover, the connecting pipe is fixedly connected to the output end of the storage silo, and a switching device is installed on the connecting pipe for controlling the switching of the connecting pipe.

[0021] A conveying device is mounted on the docking cover, with its input end aligned with the output end of the docking tube and its output end inserted into the other end of the calcining device.

[0022] A shielding device includes a telescopic component, a connecting plate, two elastic support components, and a shielding plate. The fixed part of the telescopic component is fixed inside the docking cover, and the connecting plate is fixed to the telescopic part of the telescopic component. The two ends of the elastic support component are respectively hinged to the connecting plate and the shielding plate. The two elastic support components are distributed vertically and horizontally. The shielding plate is slidably installed inside the docking cover and abuts against the other end of the calcining device.

[0023] The calcining device has the function of adjusting the tilt of the calcining tube. After the baffle plate abuts against the other end of the calcining device, the calcining tube of the calcining device is in a semi-closed state during the reciprocating tilting calcination process.

[0024] Preferably, the conveying device includes a conveying pipe, a receiving port, a first driving component, and a spiral conveying shaft. The conveying pipe is fixed inside the docking cover, and the discharge end of the conveying pipe is inserted into the other end of the calcining device. The receiving port is fixedly connected to the conveying pipe and aligned with the output end of the docking pipe. The first driving component is fixed outside the docking cover. The shaft end of the spiral conveying shaft passes through the conveying pipe and the docking cover in sequence and is fixedly connected to the driving part of the first driving component. The spiral conveying shaft is rotatably installed inside the conveying pipe.

[0025] Preferably, the switching device includes a rotating tube, a second driving member, a gear, and an internal gear ring. The rotating tube is rotatably installed inside the docking cover. The fixing part of the second driving member is fixed outside the docking cover. The driving part of the second driving member passes through the docking cover and is fixedly connected to the gear. The internal gear ring is fixed inside the rotating tube. The gear meshes with the internal gear ring. The rotating tube has a switching port.

[0026] The rotating tube is rotatably connected to the receiving port. In the initial state, the switch port connects the connecting tube and the receiving port.

[0027] Preferably, the storage silo includes an outer frame, a storage rack, and an exhaust pipe. The storage rack is fixed to the outer frame, and a heat exchange chamber is formed between the storage rack and the outer frame. The exhaust pipe is installed on the outer frame. The calcining equipment also includes a blower, which is fixed to the bottom of the outer frame. The input end of the blower is fixedly connected to the docking cover, and a return pipe is fixedly connected to the output end of the blower and the outer frame. The return pipe is connected to the heat exchange chamber.

[0028] Preferably, the storage bin further includes a semi-partition, which is fixed between the outer frame and the storage rack, with the return pipe located below the semi-partition and the exhaust pipe located above the semi-partition.

[0029] Compared with related technologies, the method provided by this invention for using the purified lithium carbonate material produced from spodumene for water purification has the following beneficial effects:

[0030] This enables the resource utilization of materials after impurity removal in the production of lithium carbonate from spodumene, reduces waste emissions, lowers dependence on new resources, and aligns with the concept of sustainable development.

[0031] Compared to traditional water purifiers, the use of waste materials to prepare composite water purifiers greatly reduces raw material costs, simplifies the water purification process, reduces energy consumption, and lowers the overall cost of water purification.

[0032] The composite water purification agent combines the advantages of impurity removal materials, PAC, and PAM. It exhibits a synergistic effect in adjusting pH value, removing heavy metal ions, and coagulating and settling suspended particles and colloids, significantly improving the water purification effect. It can effectively remove a variety of pollutants from the water, making the purified water quality meet or exceed relevant national standards. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 A system diagram of the method for using the purified lithium carbonate material produced from spodumene, as provided by the present invention, for purifying water resources;

[0035] Figure 2 A three-dimensional view of the first embodiment of the calcination equipment provided by the present invention;

[0036] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of the docking cover connection part shown;

[0037] Figure 4 for Figure 3 A three-dimensional structural schematic diagram of the shielding device shown;

[0038] Figure 5 for Figure 2 The diagram shows a cross-sectional view of the switch cover.

[0039] Figure 6 for Figure 1 A schematic diagram of the cross-sectional structure of the calcination tube on the calcination apparatus shown.

[0040] Figure 7 for Figure 5 The diagram shown is a structural schematic of the switch port in the discharge state;

[0041] Figure 8 for Figure 2 The diagram shows the discharge principle when the baffle plate is separated from the left end of the calcining device.

[0042] Figure 9 A three-dimensional view of a second embodiment of the calcination equipment provided by the present invention;

[0043] Figure 10 for Figure 9 The diagram shows the structural schematic of the fan connection part;

[0044] Figure 11 This is a schematic diagram of the third embodiment of the calcination equipment provided by the present invention;

[0045] Figure 12 This is a schematic diagram of the state switching principle of the third embodiment of the calcination equipment provided by the present invention, wherein, Figure 12 (a) is a schematic diagram of the structure when the switch is in the feeding state. Figure 12 (b) is a schematic diagram of the structure when the switch is in the closed state. Figure 12 (c) is a structural diagram of the switch port switching process. Figure 12 (d) is a schematic diagram of the structure with the opening in the discharge state; Figure 12 (e) is Figure 12 (a) State diagram of the baffle under the specified conditions. Figure 12 (f) is Figure 12 (b) State diagram of the baffle under the specified conditions. Figure 12 (g) is Figure 12 (c) State diagram of the baffle in state . Figure 12 (h) is Figure 12 (d) State diagram of the shield.

[0046] Explanation of icon numbers:

[0047] 1. Calcination apparatus;

[0048] 2. Masking cover;

[0049] 3. Storage silo; 31. Outer frame; 32. Storage rack; 33. Exhaust pipe; 34. Semi-partition; 300. Heat exchange chamber;

[0050] 4. Docking cover; 41. Butt joint pipe; 42. Discharge pipe;

[0051] 5. Conveying device; 51. Conveying pipe; 52. Material inlet; 53. First driving component; 54. Screw conveyor shaft;

[0052] 6. Switching device; 61. Rotary tube; 611. Switching port; 62. Second driving component; 63. Gear; 64. Internal gear ring; 621. Lead screw;

[0053] 7. Shielding device; 71. Telescopic component; 72. Connecting plate; 73. Elastic support component; 74. Shielding plate;

[0054] 8. Fan;

[0055] 9. Return pipe.

[0056] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0057] 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.

[0058] This invention provides a method for using the purified lithium carbonate material produced from spodumene for water purification.

[0059] Please see Figure 1 In an embodiment of the present invention, the method for using the purified lithium carbonate material produced from spodumene for water purification includes the following steps:

[0060] Step S1, Pretreatment of materials after impurity removal: The materials after impurity removal from spodumene to lithium carbonate are dried to generate dried material;

[0061] Step S2: Grind and pulverize the dried material using a ball mill to generate grinding material;

[0062] Step S3, high-temperature calcination: the grinding material is placed in a calcination device for calcination treatment to generate calcined material;

[0063] Step S4, mixing: The calcined material is mixed with polyaluminum chloride and polyacrylamide in a certain proportion. After thorough mixing, an appropriate amount of water is added to make a suspension.

[0064] Step S5: The suspension is made into a granular composite water purification agent by spray drying process.

[0065] In step S2, the particle size of the pulverized material is 50-100 mesh.

[0066] The calcination temperature in step S3 is 500-600℃.

[0067] The calcination process in step S3 takes 2-3 hours.

[0068] In step S4, the calcined material accounts for 30-40%, polyaluminum chloride accounts for 40-50%, and polyacrylamide accounts for 10-20%.

[0069] Polyaluminum chloride is PAC; polyacrylamide is PAM.

[0070] Water purification methods:

[0071] Add the above-mentioned compound water purification agent to the water body to be purified at a dosage of 0.5-2g / L, depending on the water quality.

[0072] First, the magnesium hydroxide, calcium carbonate, and other components in the purified material can neutralize acidic substances in the water, adjusting the pH value of the water to a neutral range.

[0073] Secondly, the calcium sulfate and other substances in the material have certain adsorption properties, which can adsorb some heavy metal ions in the water, such as lead, mercury, and cadmium, and form precipitates.

[0074] Meanwhile, PAC hydrolyzes in water to produce a large number of polynuclear hydroxy complexes and aluminum hydroxide colloids. Through the compression of the double electric layer, adsorption charge neutralization, adsorption bridging and precipitation trapping, suspended particles and colloids in the water are aggregated into larger flocs.

[0075] PAM utilizes the adsorption and bridging effect of its long polymer chains to further promote the growth and sedimentation of flocs, thereby achieving the goal of highly efficient water purification.

[0076] The method provided in this embodiment for using the purified lithium carbonate material produced from spodumene for water purification has the following beneficial effects:

[0077] This enables the resource utilization of materials after impurity removal in the production of lithium carbonate from spodumene, reduces waste emissions, lowers dependence on new resources, and aligns with the concept of sustainable development.

[0078] Compared to traditional water purifiers, the use of waste materials to prepare composite water purifiers greatly reduces raw material costs, simplifies the water purification process, reduces energy consumption, and lowers the overall cost of water purification.

[0079] The composite water purification agent combines the advantages of impurity removal materials, PAC, and PAM. It exhibits a synergistic effect in adjusting pH value, removing heavy metal ions, and coagulating and settling suspended particles and colloids, significantly improving the water purification effect. It can effectively remove a variety of pollutants from the water, making the purified water quality meet or exceed relevant national standards. Example 1

[0080] Material pretreatment: Take 100 kg of spodumene material after impurity removal for lithium carbonate production. Testing revealed that it contained 15% magnesium hydroxide, 20% calcium carbonate, and 10% calcium sulfate, etc. Grind it to 80 mesh and then calcine it at 550℃ for 2.5 hours.

[0081] Preparation of composite water purification agent: Weigh 40 kg of pretreated material, 50 kg of PAC, and 10 kg of PAM, mix thoroughly, add an appropriate amount of water to make a suspension, and spray dry to make granular composite water purification agent.

[0082] Water purification: A sample of industrial wastewater was selected. Its pH was 4.5, and it contained 5 mg / L of lead ions, 2 mg / L of mercury ions, and 300 mg / L of suspended solids. 1.5 kg of a compound water purification agent was added to 1000 L of this wastewater. After stirring and reacting for 30 minutes, the mixture was allowed to settle for 1 hour. Test results showed that the treated wastewater had a pH of 7.2, the lead ion concentration decreased to 0.1 mg / L, the mercury ion concentration decreased to 0.05 mg / L, and the suspended solids content decreased to 10 mg / L. All indicators met national emission standards. Example 2

[0083] Material pretreatment: Take 80 kg of the purified material, grind it to 60 mesh, and calcine it at 500℃ for 3 hours.

[0084] Preparation of composite water purification agent: The composite water purification agent is prepared by mixing 35kg of pretreatment material, 45kg of PAC and 20kg of PAM.

[0085] Water purification: For a eutrophic lake with a pH of 6.0, total phosphorus content of 1 mg / L, total nitrogen content of 3 mg / L, and high algae content, 1 kg of compound water purifier was added to 1000 L of this water. After reaction and sedimentation, the pH stabilized at around 7.0, the total phosphorus content decreased to 0.2 mg / L, the total nitrogen content decreased to 1 mg / L, the algae count significantly decreased, and the water transparency significantly improved.

[0086] This invention provides a calcination apparatus for calcining materials in the method for producing lithium carbonate from spodumene and then using the purified material for water purification.

[0087] First embodiment:

[0088] Please refer to the following: Figures 2 to 4 In the first embodiment of the present invention, the calcination equipment includes:

[0089] Calcination apparatus 1;

[0090] A shielding cover 2 is fitted onto one end of the calcining device 1;

[0091] Storage bin 3, which is installed above the other end of the calcining device 1;

[0092] A docking cover 4 is fixedly installed at the bottom of the storage silo 3 and sleeved on the other end of the calcining device 1. A connecting pipe 41 and a discharge pipe 42 are respectively provided at the top and bottom of the docking cover 4. The connecting pipe 41 is fixedly connected to the output end of the storage silo 3. A switching device 6 is installed on the connecting pipe 41 and is used to control the switching of the connecting pipe 41.

[0093] The conveying device 5 is installed on the docking cover 4, with the input end of the conveying device 5 aligned with the output end of the docking tube 41, and the output end of the conveying device 5 inserted into the other end of the calcining device 1.

[0094] The shielding device 7 includes a telescopic member 71, a connecting plate 72, two elastic support members 73, and a shielding plate 74. The fixed part of the telescopic member 71 is fixed inside the docking cover 4. The connecting plate 72 is fixed to the telescopic part of the telescopic member 71. The two ends of the elastic support member 73 are respectively hinged to the connecting plate 72 and the shielding plate 74. The two elastic support members 73 are distributed vertically and horizontally. The shielding plate 74 is slidably installed inside the docking cover 4 and abuts against the other end of the calcining device 1.

[0095] The calcining device 1 has the function of adjusting the tilt of the calcining tube. After the baffle plate 74 abuts against the other end of the calcining device 1, the calcining tube of the calcining device 1 is in a semi-closed state during the reciprocating tilting calcination process.

[0096] In this embodiment, the calcination device 1 is an electromagnetic calcination furnace, and the calcination tube is driven and adjusted by a hydraulic cylinder, which can adjust the tilt angle of the calcination tube according to the needs of use.

[0097] The calcination tube on the calcination device 1 has three operating states, which are switched by a hydraulic cylinder:

[0098] With the material being fed at an angle, the left end of the calcining tube is higher than the right end, which facilitates feeding from the left end of the calcining tube and has the function of transferring and calcining the material from left to right inside the calcining tube.

[0099] In a horizontal position, the left and right ends of the calcining tube are level, which facilitates the constant rolling calcination of the material inside the calcining tube;

[0100] With the material being fed at an angle, the left end of the calcining tube is lower than the right end, which facilitates feeding from the left end of the calcining tube and also allows for the transfer and calcination of materials from right to left within the calcining tube.

[0101] When the calcining tube switches between inclined feeding and inclined discharging states, it can push the material back and forth inside the calcining tube to achieve uniform calcination of the material.

[0102] The shielding cover 2 and the shielding plate 74 respectively shield both ends of the calcining tube, so that both ends of the calcining device 1 are in a semi-closed state; during this period, no matter what state the calcining tube is in, the material can be stably stored inside the calcining tube for calcination, effectively avoiding the problem of material leakage during the process of material being pushed back and forth for calcination.

[0103] In this embodiment, the material is stored in advance inside the storage silo 3. The connecting pipe 41 connects the storage silo 3 and the conveying device 5. The conveying device 5 is used to convey the material into the calcination tube of the calcination device 1.

[0104] Material reciprocating calcination principle:

[0105] Before using the equipment, install the shield 2 to the right end of the calcining device 1, activate the telescopic component 71, the telescopic component 71 drives the connecting plate 72 to move to the right, the connecting plate 72 drives the elastic support 73 and the shield 74 to move to the right, after the shield 74 moves to the right and abuts against the left end of the calcining device 1, the connecting plate 72 continues to move to the right and compresses the elastic support 73; when the left end of the calcining device 1 is tilted and adjusted, the elastic support 73 stably abuts against the shield 74, so that the shield 74 maintains contact with the left end of the calcining device 1, ensuring that the material has the function of reciprocating pushing calcination, while preventing material leakage during the calcination process;

[0106] When the equipment is in use, the connecting pipe 41 is opened by the switch device 6, and the conveying device 5 is started. The conveying device 5 drives the material to be conveyed towards the interior of the calcining device 1. During the conveying, both ends of the calcining device 1 are kept in a semi-closed state to ensure the stability of the feeding.

[0107] After feeding is completed, the switch device 6 and the conveying device 5 are turned off in sequence, and the calcining device 1 begins to push the material inside back and forth, so that the material is calcined more evenly and the phenomenon of uneven heating of the material at the end is avoided.

[0108] Please refer to the following: Figure 3 and Figure 5 The conveying device 5 includes a conveying pipe 51, a receiving port 52, a first driving component 53, and a spiral conveying shaft 54. The conveying pipe 51 is fixed inside the docking cover 4, and the discharge end of the conveying pipe 51 is inserted into the other end of the calcining device 1. The receiving port 52 is fixedly connected to the conveying pipe 51 and is aligned with the output end of the docking pipe 41. The first driving component 53 is fixed outside the docking cover 4. The shaft end of the spiral conveying shaft 54 ​​passes through the conveying pipe 51 and the docking cover 4 in sequence and is fixedly connected to the driving part of the first driving component 53. The spiral conveying shaft 54 ​​is rotatably installed inside the conveying pipe 51.

[0109] The first driving component 53 adopts a motor structure to provide power for the rotation of the spiral conveying shaft 54, thereby transmitting the material entering the conveying pipe 51, so that the material can be conveyed through the conveying pipe 51 to the left end of the calcining device 1.

[0110] Material conveying principle:

[0111] When it is necessary to feed material to the left end of the calcining device 1, the first driving component 53 is activated. The first driving component 53 drives the spiral conveying shaft 54 ​​to rotate, and the spiral conveying shaft 54 ​​drives the material entering the conveying pipe 51 to be conveyed toward the interior of the calcining device 1.

[0112] As the material enters the calcining device 1, the baffle plate 74 remains in contact with the left end of the calcining device 1, and the calcining device 1 controls the calcining tube to tilt back and forth so that the material can be evenly distributed inside the calcining device 1.

[0113] In an optional embodiment of this example, the switching device 6 can be an electromagnetic flow valve, directly mounted on the connecting pipe 41. This allows for convenient direct control of the switching of the connecting pipe 41 via the electromagnetic flow valve.

[0114] In another optional implementation of this embodiment, please refer to the following: Figure 3 and Figure 5 The switching device 6 includes a rotating tube 61, a second driving member 62, a gear 63, and an internal gear ring 64. The rotating tube 61 is rotatably installed inside the docking cover 4. The fixing part of the second driving member 62 is fixed outside the docking cover 4. The driving part of the second driving member 62 passes through the docking cover 4 and is fixedly connected to the gear 63. The internal gear ring 64 is fixed inside the rotating tube 61. The gear 63 meshes with the internal gear ring 64. The rotating tube 61 has a switching port 611.

[0115] The rotating tube 61 is rotatably connected to the receiving port 52. In the initial state, the switch port 611 connects the connecting tube 41 and the receiving port 52.

[0116] The second driving component 62 is a motor structure used to directly drive the gear 63 to rotate. When the gear 63 rotates, it synchronously drives the internal gear ring 64 to rotate, thereby driving the rotating tube 61 to rotate and adjust, so as to switch the working state of the switch port 611.

[0117] In this embodiment, the switch port 611 includes three operating states:

[0118] In the feeding state, the switch port 611 faces upward and connects the connecting pipe 41 and the receiving port 52. During this period, the baffle plate 74 maintains contact with the left end of the calcining device 1 to stably feed material into the calcining device 1.

[0119] In the closed state, the switch port 611 is in a horizontal position, and the rotating tube 61 blocks the connecting tube 41 and the receiving port 52. During this period, the baffle plate 74 maintains contact with the left end of the calcining device 1 for uniform calcination of the material inside the calcining device 1.

[0120] In the discharge state, the switch port 611 faces downward and is connected to the discharge pipe 42. The rotating pipe 61 blocks the connecting pipe 41 and the receiving port 52. During this period, the baffle plate 74 is separated from the calcining device 1. The left end of the calcining device 1 is in an inclined feeding state to facilitate the discharge of the calcined material.

[0121] The second driving member 62 drives the gear 63 to rotate, the gear 63 drives the internal gear ring 64 to rotate, the internal gear ring 64 drives the rotating tube 61 to rotate, and the rotating tube 61 drives the switch port 611 to rotate.

[0122] When the switch port 611 is aligned with the connecting pipe 41, the connecting pipe 41 is opened;

[0123] When the switch port 611 is separated from the connecting pipe 41, the connecting pipe 41 is closed;

[0124] When the switch port 611 is aligned with the discharge pipe 42, the discharge pipe 42 is opened;

[0125] This allows for the switching adjustment of the connecting pipe 41 and the receiving port 52; while achieving stable switching control of the input material, the rotating pipe 61 also blocks the discharge pipe 42, preventing material leakage from the left end of the calcining device 1.

[0126] The arrangement of the rotating tube 61 also provides support for the subsequent optimization of the structure.

[0127] The operating principle of the calcination equipment provided in this embodiment is as follows:

[0128] A1, the shield 2 is installed at the right end of the calcining device 1 before the heat engine;

[0129] A2, activate the telescopic component 71, the telescopic component 71 drives the connecting plate 72 to move to the right, the connecting plate 72 drives the blocking plate 74 to move to the right through the elastic support component 73, until the blocking plate 74 abuts against the left end of the calcining device 1, and the elastic support component 73 maintains the compressed state;

[0130] A3, start the second driving component 62, the second driving component 62 controls the rotating tube 61 to rotate, the rotating tube 61 drives the switch port 611 to adjust to the feeding state, so that the connecting pipe 41 is opened, and the material inside the storage bin 3 enters the interior of the conveying pipe 51 through the connecting pipe 41 and the receiving port 52;

[0131] Restart the first drive unit 53, which drives the spiral conveyor shaft 54 ​​to rotate. The spiral conveyor shaft 54 ​​drives the material in the conveying pipe 51 to be conveyed through the conveying pipe 51 to the interior of the calcining device 1.

[0132] A4. After the material is conveyed, the rotating tube 61 is controlled to rotate by the second driving component 62, so that the switch port 611 is switched to the closed state, and the calcining device 1 is controlled to push the material back and forth, so that the material is calcined and heated more evenly. During this period, the elastic support component 73 maintains the contact between the baffle plate 74 and the left end of the calcining device 1.

[0133] A5. After calcination, the connecting plate 72, the elastic support 73 and the baffle plate 74 are moved to the left and separated from the left end of the calcination device 1 by the telescopic component 71; then the switch port 611 is switched to the discharge state, and finally the calcination device 1 is controlled to discharge the material. The material is discharged downward through the discharge pipe 42 and is received and transported by a material hopper car.

[0134] Second Embodiment

[0135] Please refer to the following: Figures 9 to 10 Based on the calcination apparatus provided in the first embodiment of the present invention, the second embodiment of the present invention proposes another calcination apparatus. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0136] Specifically, the calcination equipment provided in the second embodiment of the present invention differs in that the storage bin includes an outer frame 31, a storage rack 32, and an exhaust pipe 33. The storage rack 32 is fixedly mounted on the outer frame 31, and a heat exchange chamber 300 is formed between the storage rack 32 and the outer frame 31. The exhaust pipe 33 is mounted on the outer frame 31. The calcination equipment also includes a blower 8, which is fixedly mounted at the bottom of the outer frame 31. The input end of the blower 8 is fixedly connected to the docking cover 4, and a return pipe 9 is fixedly connected to the output end of the blower 8 and the outer frame 31. The return pipe 9 is connected to the heat exchange chamber 300.

[0137] In this embodiment, the fan 8 adopts a heat-resistant fan structure, which can meet the needs of flue gas extraction and transportation in the calcination equipment.

[0138] The storage rack 32 is made of stainless steel sheet, which has good thermal conductivity and heat exchange performance. The return pipe 9 is made of heat-resistant and insulated material, which is used to stabilize the transmission of flue gas while reducing temperature loss.

[0139] Air extraction principle:

[0140] During the calcination process of the material in the calcination device 1, the flue gas generated inside will be preferentially discharged from the left end of the calcination device 1 into the docking cover 4 under the shielding effect of the shielding cover 2.

[0141] When air extraction is required, the fan 8 is started. The fan 8 draws the flue gas that has entered the area of ​​the docking hood 4, so that the flue gas is transported to the heat exchange chamber 300 through the return pipe 9. The flue gas exchanges heat with the storage rack 32 through the heat exchange chamber 300, which preheats the material in the storage rack 32 on the one hand, and maintains the dryness inside the storage rack 32 on the other hand.

[0142] The fan 8 draws out the flue gas slowly, which does not affect the natural air circulation inside the calcining device 1, ensuring a constant internal temperature, reducing heat loss, and making full use of energy.

[0143] In a preferred embodiment, the input end of the fan 8 is offset from the rotating tube 61 and directly connected to the docking hood 4. This facilitates direct extraction of flue gas from the docking hood 4.

[0144] In an optional preferred embodiment, the output end of the exhaust pipe 33 is provided with a smoke and dust filtration device.

[0145] Flue gas can be easily filtered and treated by flue gas filtration equipment, reducing the pollution of the air caused by direct discharge of flue gas, improving the quality of flue gas emissions, and meeting the requirements for safe exhaust gas emission.

[0146] Please refer to it again. Figure 10 The storage bin 3 also includes a semi-partition 34, which is fixed between the outer frame 31 and the storage rack 32. The return pipe 9 is located below the semi-partition 34, and the exhaust pipe 33 is located above the semi-partition 34.

[0147] In this embodiment, the semi-partition 34 has a U-shaped structure and is arranged between the outer frame 31 and the storage rack 32 to facilitate the diversion of flue gas within the range of the heat exchange chamber 300 and increase the sufficiency of contact between the flue gas and the storage rack 32.

[0148] The semi-partition 34 facilitates the separation of the exhaust pipe 33 and the return pipe 9, allowing the flue gas entering the heat exchange chamber 300 to pass evenly around the periphery of the storage rack 32. This ensures that the flue gas and the storage rack 32 exchange heat sufficiently before the exhaust gas is discharged. This reduces the environmental impact of the flue gas and fully utilizes the residual heat of the flue gas to preheat the material inside the storage rack 32, keeping the material dry.

[0149] In another preferred embodiment, the input end of the fan 8 is aligned with the rotation range of the switch port 611. When the switch port 611 is aligned with the input end of the fan 8, the fan 8 is started and extracts the flue gas inside the docking hood 4.

[0150] The input port of the fan 8 can be conveniently switched on and off via the switch port 611 on the rotating tube 61.

[0151] When the rotating tube 61 is in the feeding state, the inlet of the fan 8 is closed, which facilitates the maintenance of stable natural airflow when the material is fed into the interior of the calcining device 1, and reduces the loss of temperature before calcination.

[0152] When the rotating tube 61 is closed, the inlet of the fan 8 is opened, which facilitates the extraction of flue gas generated during the calcination process after the material is completely fed into the calcination device 1. This allows the residual heat of the flue gas to preheat the material inside the storage rack 32, maintain the dryness of the material, and make full use of the flue gas generated during calcination.

[0153] When the rotating tube 61 is in the discharge state, the inlet of the fan 8 is closed, which maintains a stable feeding of the calcined material while reducing air circulation and temperature loss, thus saving energy consumption.

[0154] The flue gas conveying principle of the calcination equipment provided in this embodiment is as follows:

[0155] B1. During the process of material being fed into the calcining device 1 through the conveying device 5, the rotating tube 61 keeps the input end of the fan 8 closed, reducing air flow and temperature loss when feeding into the calcining device 1, and maintaining temperature stability within the calcination range.

[0156] B2. After the material conveying is completed, the second drive unit 62 is activated. The second drive unit 62 drives the gear 63 to rotate, the gear 63 drives the rotating tube 61 to rotate, and the rotating tube 61 drives the switch port 611 to rotate, so that the switch port 611 switches from the feeding state to the closed state.

[0157] At the same time, the switch port 611 is aligned with the input end of the fan 8. After the fan 8 is started, it can extract the flue gas generated during the calcination process and transport the extracted flue gas to the interior of the heat exchange chamber 300 through the return pipe 9.

[0158] To facilitate the extraction and transportation of flue gas generated during the calcination of materials, the flue gas is heat-exchanged through the storage rack 32. After heat exchange, the materials inside the storage rack 32 are preheated and dried, reducing the moisture content of the materials and improving the full utilization rate of energy.

[0159] B3. After the material is calcined, the second drive unit 62 is started again. The second drive unit 62 controls the rotating tube 61 to rotate, so that the switch port 611 switches from the closed state to the discharge state.

[0160] When the telescopic component 71 is activated, the telescopic component 71 drives the connecting plate 72 to move to the left. The connecting plate 72, through the elastic support component 73, drives the baffle plate 74 to separate from the left end of the calcining device 1, ensuring that the calcining device 1 can stably discharge material.

[0161] At the same time, the blower 8 is turned off, and the left end of the calcining device 1 is kept in an inclined feeding state. During the continuous rotation of the calcining device 1, the material is driven towards the switch port 611 to achieve stable material discharge from the calcining device 1.

[0162] B4. After the material is fed, first restore the calcining device 1 to the tilted feeding state, then control the baffle plate 74 to abut against the left end of the calcining device 1, and at the same time control the switch port 611 to return to the feeding state to provide support for the next calcination of materials.

[0163] Third Embodiment

[0164] Please see Figure 11 Based on the calcination apparatus provided in the second embodiment of the present invention, the third embodiment of the present invention proposes another calcination apparatus. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0165] Specifically, the calcination equipment provided in the third embodiment of the present invention is different in that the telescopic member 71 is a U-shaped sliding shaft structure, and the telescopic member 71 passes through the connecting plate 72 and is fixed at the bottom of the rotating tube 61;

[0166] The second driving member 62 has a drive section fixed with a threaded shaft 621, which passes through the connecting plate 72 and is threadedly connected.

[0167] In this embodiment, the screw 621 and the sliding part of the telescopic member 71 are distributed in parallel, so that the screw 621 can stably drive the connecting plate 72 to move and adjust as a whole during the rotation adjustment process.

[0168] Synchronous adjustment principle:

[0169] When the conveying device 5 conveys the material into the calcination tube of the calcination device 1, and the rotating tube 61 needs to switch from the feeding state to the closed state, the second driving component 62 is activated. The second driving component 62 drives the gear 63 to rotate, the gear 63 drives the internal gear ring 64 to rotate, the internal gear ring 64 drives the rotating tube 61 to rotate, and the rotating tube 61 drives the switch port 611 to rotate. The switch port 611 is staggered with the connecting tube 41 to achieve the closing of the connecting tube 41.

[0170] While the rotating tube 61 is rotating, the second driving member 62 also drives the wire shaft 621 to rotate synchronously. When the wire shaft 621 rotates, it drives the connecting plate 72 to move to the left. The connecting plate 72 slides stably on the telescopic member 71. The connecting plate 72 drives the two elastic support members 73 to extend and maintain a compressed state. The baffle plate 74 maintains contact with the other end of the calcining device 1.

[0171] After the material is fed into the calcining device 1, while maintaining the baffle plate 74 in contact with and sealing the calcining device 1, the calcining tube on the calcining device 1 is tilted back and forth to turbulence the flow, so that the material moves back and forth stably in the calcining tube of the calcining device 1 without falling.

[0172] Similarly, after the material inside the calcining device 1 has been calcined, the second drive unit 62 is restarted. The second drive unit 62 drives the rotating tube 61 to switch from the closed state to the discharge state, and the switch port 611 is connected to the discharge tube 42. At the same time, the second drive unit 62 drives the screw 621 to rotate synchronously. The screw 621 drives the connecting plate 72, the elastic support 73 and the baffle plate 74 to disengage from the contact state, so that the baffle plate 74 is separated from the calcining tube on the calcining device 1. This facilitates the automatic opening of the other end of the calcining tube on the calcining device 1 during the process of the rotating tube 61 switching to the discharge state. The switch port 611 is located directly below the other end of the calcining device 1, which facilitates the tilting and feeding of the calcined material.

[0173] The working principle of the method for using the purified lithium carbonate material produced from spodumene in this embodiment for water purification is as follows:

[0174] like Figure 12 (a) and Figure 12As shown in (e), it can be defined that in the initial state, the switch port 611 connects the connecting pipe 41 and the receiving port 52, the elastic support 73 is in the first pressing state, and the baffle plate 74 abuts against the other end of the calcining device 1, so that the material in the storage bin 3 can be transported to the interior of the calcining device 1 through the conveying device 5.

[0175] While the conveying device 5 conveys the material into the calcining device 1, the calcining tube on the calcining device 1 is controlled to reciprocate and tilt, so that the material is evenly conveyed into the calcining device 1.

[0176] Please refer to the following: Figure 12 (a) to Figure 12 (b) and Figure 12 (e) to Figure 12 (f) When the material injected into the conveying device 5 by the connecting pipe 41 reaches the preset amount, the second drive unit 62 is activated;

[0177] The second driving component 62 drives the rotating tube 61 to switch from the feeding state to the closed state. In the closed state, the input end of the blower 8 is connected to the docking cover 4 through the switch port 611.

[0178] On the other hand, the second driving member 62 drives the connecting plate 72 to move to the left. While the connecting plate 72 moves to the left, the elastic support member 73 extends adaptively to maintain the semi-closed contact between the shielding plate 74 and the other end of the calcining device 1.

[0179] During the stage when the material is calcined inside the calcining device 1, the calcining tube on the calcining device 1 is kept tilted and oscillating back and forth, so that the material is transported left and right and calcined evenly inside the calcining device 1. This is to maintain the semi-enclosed state of both ends of the calcining device 1 during the left and right transportation of the material, so as to ensure that the material is heated evenly and to prevent the material from falling off during calcination.

[0180] While the material is being calcined, the blower 8 is started. The blower 8 draws the flue gas inside the docking hood 4 and transports it. The transported flue gas is transported to the interior of the heat exchange chamber 300 through the return pipe 9. The flue gas exchanges heat with the storage rack 32 through the heat exchange chamber 300 to preheat the material inside the storage rack 32. The gas after heat exchange is filtered through the exhaust pipe 33 and then discharged. The gas discharged through the exhaust pipe 33 can also be used to provide a heat source for drying the raw materials, reducing energy consumption during the raw material drying step and making full use of the system's energy.

[0181] like Figure 12 (b) and Figure 12As shown in (f), the switch port 611 is connected to the input end of the blower 8, the connecting pipe 41 and the receiving port 52 are blocked and closed by the rotating pipe 61, the elastic support 73 is in the second pressing state, and the baffle plate 74 abuts against the other end of the calcining device 1, so that the flue gas collected inside the connecting cover 4 can be extracted by the blower 8 and transported to the inside of the heat exchange chamber 300 to preheat the material inside the storage rack 32, maintain the dryness of the material, and at the same time maintain the stability of the reciprocating swing of the material inside the calcining device 1;

[0182] Please refer to the following: Figure 12 (b) to Figure 12 (c) to Figure 12 (d) and Figure 12 (f) to Figure 12 (g) to Figure 12 (h) After the calcination of the material in the calcination device 1 is completed, the second drive unit 62 is started;

[0183] The second driving component 62 drives the rotating tube 61 to switch from the closed state to the discharge state, the switch port 611 is connected to the discharge tube 42, and the blower 8 is turned off;

[0184] On the other hand, the second driving member 62 drives the connecting plate 72 to move to the left. At the same time as the connecting plate 72 moves to the left, the elastic support member 73 extends adaptively and moves to the left. After the elastic support member 73 extends, it drives the blocking plate 74 to move to the left. The blocking plate 74 separates from the other end of the calcining device 1 and opens, which facilitates the opening of the left end of the calcining device 1.

[0185] Before discharge, a receiving hopper is installed at the bottom of the discharge pipe 42. During discharge, while the left end of the calcining device 1 is tilted downward, the calcining pipe continues to rotate so that the material inside the calcining pipe can be conveyed to the left and discharged downward from the left end of the calcining device 1. During discharge, the material is protected by the docking cover 4 and is not affected by the flow of external air, and the temperature loss is less.

[0186] like Figure 12 (d) and Figure 12 As shown in (h), the switch port 611 is connected to the discharge pipe 42, the connecting pipe 41 and the receiving port 52 are blocked and closed by the rotating pipe 61, the elastic support 73 is in a natural state, and the baffle plate 74 is separated from the left end of the calcining device 1 to facilitate the discharge of the material after calcination and reduce the loss of temperature.

[0187] After the material is discharged, the left end of the calcining device 1 returns to the tilted upward state, and then the rotating tube 61 is switched to the feeding state. At the same time, the baffle plate 74 returns to the state of abutting against the left end of the calcining device 1.

[0188] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A method for preparing a composite water purification agent using the purified lithium carbonate material from spodumene production, characterized in that, Includes the following steps: Step S1, Pretreatment of materials after impurity removal: The materials after impurity removal from spodumene to lithium carbonate are dried to generate dried material; Step S2: Grind and pulverize the dried material using a ball mill to generate abrasive material; Step S3, high-temperature calcination: the grinding material is placed in a calcination device for calcination treatment to generate calcined material; Step S4, mixing: The calcined material is mixed with polyaluminum chloride and polyacrylamide in a certain proportion. After thorough mixing, an appropriate amount of water is added to make a suspension. Step S5: The suspension is made into a granular composite water purification agent by spray drying process; The calcination equipment includes: Calcination apparatus; A shielding cover, which is fitted over one end of the calcining device; A storage silo, which is installed above the other end of the calcining device; A docking cover is fixedly installed at the bottom of the storage silo and sleeved on the other end of the calcining device; a connecting pipe and a discharge pipe are respectively provided at the top and bottom of the docking cover, the connecting pipe is fixedly connected to the output end of the storage silo, and a switching device is installed on the connecting pipe for controlling the switching of the connecting pipe. A conveying device is mounted on the docking cover, with its input end aligned with the output end of the docking pipe and its output end inserted into the other end of the calcining device. The conveying device includes a receiving port aligned with the output end of the docking pipe. A shielding device includes a telescopic component, a connecting plate, two elastic support components, and a shielding plate. The fixed part of the telescopic component is fixed inside the docking cover, and the connecting plate is fixed to the telescopic part of the telescopic component. The two ends of the elastic support component are respectively hinged to the connecting plate and the shielding plate. The two elastic support components are distributed parallel to each other vertically. The shielding plate is slidably installed inside the docking cover and abuts against the other end of the calcining device. The calcining device has the function of adjusting the tilt of the calcining tube. After the baffle plate abuts against the other end of the calcining device, the calcining tube of the calcining device is in a semi-closed state during the reciprocating tilting calcination process. The switching device includes a rotating tube, a second driving member, a gear, and an internal gear ring. The rotating tube is rotatably installed inside the docking cover. The fixing part of the second driving member is fixed outside the docking cover. The driving part of the second driving member passes through the docking cover and is fixedly connected to the gear. The internal gear ring is fixed inside the rotating tube. The gear meshes with the internal gear ring. A switching port is provided on the rotating tube. The switch port includes three working states: In the feeding state, the switch port faces upward and connects the connecting pipe and the receiving port. During this period, the baffle plate remains in contact with the other end of the calcining device to stably feed material into the calcining device. In the closed state, the switch port is in a horizontal position, and the rotating tube blocks the connecting pipe and the receiving port. During this period, the baffle plate remains in contact with the other end of the calcining device for uniform calcination of the material inside the calcining device. In the discharge state, the switch port faces downward and is connected to the discharge pipe. The rotating pipe blocks the connecting pipe and the receiving port. During this period, the baffle plate is separated from the calcining device, and the other end of the calcining device is in an inclined discharge state to facilitate the discharge of the calcined material.

2. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 1, characterized in that, In step S2, the particle size of the pulverized material is 50-100 mesh.

3. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 1, characterized in that, The calcination temperature in step S3 is 500-600℃.

4. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 3, characterized in that, The calcination process in step S3 takes 2-3 hours.

5. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 1, characterized in that, In step S4, the calcined material accounts for 30-40%, polyaluminum chloride accounts for 40-50%, and polyacrylamide accounts for 10-20%.

6. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 1, characterized in that, The conveying device includes a conveying pipe, a first driving component, and a spiral conveying shaft. The conveying pipe is fixed inside the docking cover, and the discharge end of the conveying pipe is inserted into the other end of the calcining device. The receiving port is fixedly connected to the conveying pipe. The first driving component is fixed outside the docking cover. The shaft end of the spiral conveying shaft passes through the conveying pipe and the docking cover in sequence and is fixedly connected to the driving part of the first driving component. The spiral conveying shaft is rotatably installed inside the conveying pipe.

7. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 6, characterized in that, The storage silo includes an outer frame, a storage rack, and an exhaust pipe. The storage rack is fixed to the outer frame, and a heat exchange chamber is formed between the storage rack and the outer frame. The exhaust pipe is installed on the outer frame. The calcining equipment also includes a fan, which is fixed to the bottom of the outer frame. The input end of the fan is fixedly connected to the docking cover, and a return pipe is fixedly connected to the output end of the fan and the outer frame. The return pipe is connected to the heat exchange chamber.

8. The method for preparing a composite water purification agent using the lithium carbonate production material after impurity removal from spodumene according to claim 7, characterized in that, The storage bin also includes a semi-partition, which is fixed between the outer frame and the storage rack. The return pipe is located below the semi-partition, and the exhaust pipe is located above the semi-partition.

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