Method for purifying water resources by using impurity-removed lithium carbonate material produced from spodumene

Abstract

The invention provides a method for purifying water resources by using an impurity-removed material for producing lithium carbonate from spodumene, and relates to the technical field of water resource purification, the method for purifying water resources by using the impurity-removed material for producing lithium carbonate from spodumene comprises the following steps: S1, pretreating the impurity-removed material; drying the impurity-removed material for producing lithium carbonate from spodumene to generate a dried material; s2, grinding and crushing the dried material by using a ball mill to generate a ground material; according to the scheme, resource utilization of materials after impurity removal during production of lithium carbonate from spodumene is finally achieved, waste discharge is reduced, dependence on new resources is reduced, and the concept of sustainable development is met; compared with a traditional water purifying agent, the composite water purifying agent is prepared from waste materials, the cost of raw materials is greatly reduced, meanwhile, the water purifying process is simplified, energy consumption is reduced, and the overall water resource purifying cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water resource purification, and in particular to a method for purifying water resources by using lithium feldspar production lithium carbonate impurity-removed material. BACKGROUND

[0002] In the face of global water shortage and increasingly serious water pollution, it is crucial to develop efficient and low-cost water purification technology. Traditional water purification methods often have problems such as high cost, complex process, secondary pollution, etc., while using water purification agents that can react with other impurities in water can achieve the purpose of water purification, with simple manufacturing process, low cost and high purification efficiency.

[0003] In the process of producing lithium carbonate from lithium feldspar, a large amount of material is generated after sodium carbonate and sodium hydroxide are removed. Currently, most of these materials are discarded or simply treated, which not only wastes resources but also pollutes the environment. Therefore, how to use the lithium feldspar production lithium carbonate impurity-removed material to prepare a usable water purification agent needs further research.

[0004] Therefore, it is necessary to provide a method for purifying water resources by using lithium feldspar production lithium carbonate impurity-removed material to solve the above technical problems. SUMMARY

[0005] The present application provides a method for purifying water resources by using lithium feldspar production lithium carbonate impurity-removed material, which solves the problem of how to use lithium feldspar production lithium carbonate impurity-removed material to prepare a usable water purification agent in related art.

[0006] To solve the above technical problems, the method for purifying water resources by using lithium feldspar production lithium carbonate impurity-removed material provided by the present application includes the following steps: Step S1, impurity-removed material pretreatment, drying the lithium feldspar production lithium carbonate impurity-removed material to generate dried material; Step S2, grinding and crushing the dried material with a ball mill to generate ground material; Step S3, high-temperature calcination, placing the ground material in a calcination device for calcination treatment to generate calcined material; Step S4, doping and mixing, mixing the calcined material with polyaluminum chloride and polyacrylamide in a certain proportion, and then adding an appropriate amount of water to form a suspension; Step S5, preparing a granular composite water purification agent by spray drying process.

[0007] Preferably, the particle size in step S2 is 50-100 mesh.

[0008] Preferably, the temperature of the calcination treatment in step S3 is 500-600℃.

[0009] Preferably, the time of the calcination treatment in step S3 is 2-3 hours.

[0010] Preferably, the calcination material in step S4 accounts for 30-40%, the polyaluminum chloride accounts for 40-50%, and the polyacrylamide accounts for 10-20%.

[0011] Preferably, the calcination equipment comprises: a calcination device; a shielding cover sleeved at one end of the calcination device; a storage bin installed above the other end of the calcination device; a docking cover fixedly arranged at the bottom of the storage bin, the docking cover being sleeved at the other end of the calcination device; the top and bottom of the docking cover are respectively provided with a docking pipe and a discharge pipe, the docking pipe being fixedly communicated with the output end of the storage bin, and a switch device being installed on the docking pipe and used for controlling the opening and closing of the docking pipe; a conveying device installed on the docking cover, the input end of the conveying device being aligned with the output end of the docking pipe, and the output end of the conveying device being inserted into the other end of the calcination device; a shielding device comprising a telescopic member, a connecting plate, two elastic supporting members, and a shielding plate, the fixed part of the telescopic member being fixedly arranged in the docking cover, the connecting plate being fixedly arranged at the telescopic part of the telescopic member, the two ends of the elastic supporting members being respectively hinged to the connecting plate and the shielding plate, the two elastic supporting members being distributed in parallel from top to bottom, and the shielding plate being slidingly installed in the docking cover and abutting against the other end of the calcination device; wherein the calcination device has the function of inclining adjustment of the calcination pipe, and the calcination pipe of the calcination device is in a semi-closed state in the process of reciprocating and inclining calcination after the shielding plate abuts against the other end of the calcination device.

[0012] Preferably, the conveying device comprises a conveying pipe, a receiving port, a first driving member, and a spiral conveying shaft, the conveying pipe being fixedly arranged in the docking cover, the discharge end of the conveying pipe being inserted into the other end of the calcination device, the receiving port being fixedly communicated with the conveying pipe and aligned with the output end of the docking pipe, the first driving member being fixedly arranged outside the docking cover, the shaft end of the spiral conveying shaft being fixedly connected with the driving part of the first driving member in sequence after penetrating the conveying pipe and the docking cover, and the spiral conveying shaft being rotatably arranged in the conveying pipe.

[0013] Preferably, the switch device comprises a rotating tube, a second driving member, a gear and an inner ring, the rotating tube is rotatably installed in the docking cover, the fixed part of the second driving member is fixedly arranged outside the docking cover, the driving part of the second driving member is fixedly connected with the gear after penetrating through the docking cover, the inner ring is fixedly arranged in the rotating tube, the gear is meshingly connected with the inner ring, and the rotating tube is provided with a switch opening. The rotating tube is rotatably connected with the material receiving opening, and in the initial state, the switch opening is in communication with the docking pipe and the material receiving opening.

[0014] Preferably, the storage bin comprises an outer frame, a storage rack and an exhaust pipe, the storage rack is fixedly arranged on the outer frame, a heat exchange cavity is formed between the storage rack and the outer frame, and the exhaust pipe is installed on the outer frame; the calcining device further comprises a fan, the fan is fixedly arranged at the bottom of the outer frame, the input end of the fan is fixedly connected with the docking cover, a backflow pipe is fixedly connected between the output end of the fan and the outer frame, and the backflow pipe is in communication with the heat exchange cavity.

[0015] Preferably, the storage bin further comprises a half partition plate, the half partition plate is fixedly arranged between the outer frame and the storage rack, the backflow pipe is located below the half partition plate, and the exhaust pipe is located above the half partition plate.

[0016] Compared with the related art, the method for purifying water resources by using the lithium feldspar production lithium carbonate impurity-removed material has the following beneficial effects: The method 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 concept of sustainable development; Compared with the traditional water purifying agent, the composite water purifying agent prepared by using the waste material greatly reduces the raw material cost, simplifies the water purification process, reduces the energy consumption, and reduces the overall water resource purification cost; The composite water purifying agent combines the advantages of the impurity-removed material, PAC and PAM, and has a synergistic effect in adjusting the pH value, removing heavy metal ions, coagulating and settling suspended particles and colloids, etc., significantly improves the water purification effect, and can effectively remove various pollutants in water, so that the purified water quality meets or is better than the relevant national standards. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings from the structures shown in the drawings without creative labor.

[0018] Figure 1 System diagram of the method for purifying water resources by using the lithium-aluminum silicate lithium carbonate production impurity-removed material provided by the present application; Figure 2 Three-dimensional diagram of the first embodiment of the calcining device provided by the present application; Figure 3 Three-dimensional diagram of the first embodiment of the calcining device provided by the present application; Figure 2 Cross-sectional structural diagram of the docking cover connecting part shown in the figure; Figure 4 Three-dimensional structural diagram of the shielding device shown in the figure; Figure 3 Three-dimensional structural diagram of the shielding device shown in the figure; Figure 5 Cross-sectional structural diagram of the switch cover shown in the figure; Figure 2 Cross-sectional structural diagram of the calcining pipe of the calcining device shown in the figure; Figure 6 Cross-sectional structural diagram of the switch opening shown in the figure; Figure 1 Cross-sectional structural diagram of the calcining pipe of the calcining device shown in the figure; Figure 7 Cross-sectional structural diagram of the switch opening shown in the figure; Figure 5 Cross-sectional structural diagram of the switch opening shown in the figure; Figure 8 Cross-sectional structural diagram of the switch opening shown in the figure; Figure 2 Cross-sectional structural diagram of the switch opening shown in the figure; Figure 9 Three-dimensional diagram of the second embodiment of the calcining device provided by the present application; Figure 10 Three-dimensional diagram of the second embodiment of the calcining device provided by the present application; Figure 9 Structural diagram of the fan connecting part shown in the figure; Figure 11 Structural diagram of the third embodiment of the calcining device provided by the present application; Figure 12 State switching principle diagram of the third embodiment of the calcining device provided by the present application, wherein, Figure 12 (a) is a structural diagram of the switch opening in the feeding state, Figure 12 (b) is a structural diagram of the switch opening in the closed state, Figure 12 (c) is a structural diagram of the switch opening in the switching process, Figure 12 (d) is a structural diagram of the switch opening in the discharging state; Figure 12 (e) is a state diagram of the shielding plate in the (a) state, Figure 12 (f) is a state diagram of the shielding plate in the (b) state, Figure 12 (g) is a state diagram of the shielding plate in the (c) state, Figure 12 (h) is a state diagram of the shielding plate in the (d) state. Figure 12 Figure 12 Figure 12 Figure 12

[0019] ​​​​Brief Description of Drawings 1. calcining device; 2. shielding cover; 3. storage bin; 31, outer frame; 32, storage shelf; 33, exhaust pipe; 34, half partition; 300, heat exchange cavity; 4. butt joint cover; 41, butt joint pipe; 42, discharge pipe; 5. conveying device; 51, conveying pipe; 52, receiving port; 53, first driving member; 54, spiral conveying shaft; 6. switching device; 61, rotating pipe; 611, switching port; 62, second driving member; 63, gear; 64, inner ring gear; 621, silk shaft; 7. shielding device; 71, telescopic member; 72, connecting plate; 73, elastic supporting member; 74, shielding plate; 8. fan; 9. backflow pipe.

[0020] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] The present application provides a method for purifying water resources by using lithium spodumene production lithium carbonate impurity-removed material.

[0023] Please refer to Figure 1 In the embodiments of the present application, the method for purifying water resources by using lithium spodumene production lithium carbonate impurity-removed material comprises the following steps: Step S1, pretreatment of impurity-removed material, drying the material after lithium spodumene production lithium carbonate impurity removal to generate dried material; Step S2, grinding and crushing the dried material by using a ball mill to generate ground material; Step S3, high-temperature calcination, placing the ground material in a calcining device for calcination treatment to generate calcined material; Step S4, doping and mixing, mixing the calcined material with polyaluminum chloride and polyacrylamide in a certain proportion, fully stirring and mixing uniformly, and then adding an appropriate amount of water to prepare a suspension; Step S5, preparing the suspension into granular composite water purifying agent by a spray drying process.

[0024] The particle size of the crushed material in step S2 is 50-100 mesh.

[0025] The temperature of the calcination treatment in step S3 is 500-600 DEG C.

[0026] The time of the calcination treatment in step S3 is 2-3 hours.

[0027] The proportion of the calcined material in step S4 is 30-40%, the proportion of the polyaluminum chloride is 40-50%, and the proportion of the polyacrylamide is 10-20%.

[0028] The polyaluminum chloride is PAC, and the polyacrylamide is PAM.

[0029] Water purification method: In the water to be purified, the above-mentioned composite water purifying agent is added in a dosage of 0.5-2 g / L according to the water quality.

[0030] Firstly, the magnesium hydroxide, calcium carbonate and other components in the material after impurity removal can react with acidic substances in the water body to neutralize the water body to a neutral pH range.

[0031] Secondly, the calcium sulfate and other components in the material have certain adsorption performance and can adsorb part of heavy metal ions such as lead, mercury and cadmium in the water body to form a precipitate.

[0032] At the same time, PAC produces a large amount of polynuclear hydroxyl complexes and aluminum hydroxide colloids in water through hydrolysis, which can make the suspended particles and colloids in water coagulate into larger flocs through the effects of double electric layer compression, adsorption and neutralization, adsorption and bridging, and precipitation net capture.

[0033] PAM further promotes the growth and settlement of flocs through the adsorption and bridging effect of its long polymer chain, so as to achieve the purpose of high-efficiency water purification.

[0034] The method for purifying water resources by using the material after impurity removal in the production of lithium carbonate from spodumene provided in the embodiment has the following beneficial effects: The material after impurity removal in the production of lithium carbonate from spodumene is utilized as a resource, which reduces waste discharge, reduces the dependence on new resources, and conforms to the concept of sustainable development; Compared with traditional water purifying agents, the composite water purifying agent prepared from waste materials greatly reduces the cost of raw materials, simplifies the water purification process, reduces energy consumption, and reduces the overall cost of water resource purification; The composite water purifying agent combines the advantages of the material after impurity removal, PAC and PAM, and has a synergistic effect in adjusting the pH value, removing heavy metal ions, coagulating and settling suspended particles and colloids, etc., which significantly improves the water purification effect and can effectively remove various pollutants in water, so that the purified water quality meets or is better than the relevant national standards. Embodiment 1

[0035] Material pretreatment: take 100 kg of lithium feldspar production lithium carbonate after impurity removal material, test shows that the magnesium hydroxide content is 15%, the calcium carbonate content is 20%, the calcium sulfate content is 10% and the like. Grind it to 80 mesh, then calcine at 550 DEG C for 2.5 hours.

[0036] Composite water purifying agent preparation: take 40 kg of pretreated material, PAC 50 kg, PAM 10 kg, fully stir and mix, then add appropriate amount of water to prepare suspension, and prepare granular composite water purifying agent by spray drying.

[0037] Water purification: select certain industrial wastewater, the pH value is 4.5, the lead ion concentration is 5 mg / L, the mercury ion concentration is 2 mg / L, and the suspended solids content is 300 mg / L. 1.5 kg of composite water purifying agent is added to 1000 L of the wastewater, stirred for 30 minutes, and then settled for 1 hour. The test results show that the pH value of the treated wastewater is 7.2, the lead ion concentration is reduced to 0.1 mg / L, the mercury ion concentration is reduced to 0.05 mg / L, and the suspended solids content is reduced to 10 mg / L, all meeting the national discharge standards. Example 2

[0038] Material pretreatment: take 80 kg of impurity removal material, grind it to 60 mesh, and calcine at 500 DEG C for 3 hours.

[0039] Composite water purifying agent preparation: prepare the composite water purifying agent by mixing 35 kg of pretreated material, 45 kg of PAC and 20 kg of PAM.

[0040] Water purification: for the eutrophication of a certain lake water body, the pH value is 6.0, the total phosphorus content is 1 mg / L, the total nitrogen content is 3 mg / L, and the algae content is high. 1 kg of composite water purifying agent is added to 1000 L of the water body, and after reaction and sedimentation, the water body pH value is stable at about 7.0, the total phosphorus content is reduced to 0.2 mg / L, the total nitrogen content is reduced to 1 mg / L, the number of algae is significantly reduced, and the water body transparency is significantly improved.

[0041] The present application provides a calcining equipment for the calcining treatment of the material in the method for purifying water resources by using lithium feldspar production lithium carbonate after impurity removal.

[0042] First embodiment: Please refer to Figures 2 to 4 In the first embodiment of the present application, the calcining equipment comprises: A calcining device 1; A shielding cover 2, which is sleeved on one end of the calcining device 1; A storage bin 3, which is installed above the other end of the calcining device 1; A docking cover 4 is fixedly arranged at the bottom of the storage bin 3, and is sleeved on the other end of the calcining device 1; the top and bottom of the docking cover 4 are respectively provided with a docking pipe 41 and a discharge pipe 42, the docking pipe 41 is fixedly communicated with the output end of the storage bin 3, and a switch device 6 is installed on the docking pipe 41, which is used to control the opening and closing of the docking pipe 41; A conveying device 5 is installed on the docking cover 4, the input end of the conveying device 5 is aligned with the output end of the docking pipe 41, and the output end of the conveying device 5 is inserted into the other end of the calcining device 1; A shielding device 7 includes an extension piece 71, a connecting plate 72, two elastic supporting pieces 73 and a shielding plate 74, the fixed part of the extension piece 71 is fixedly arranged in the docking cover 4, the connecting plate 72 is fixedly arranged on the extension part of the extension piece 71, the two ends of the elastic supporting piece 73 are respectively hinged to the connecting plate 72 and the shielding plate 74, the two elastic supporting pieces 73 are distributed in parallel from top to bottom, and the shielding plate 74 is slidingly installed in the docking cover 4 and abuts against the other end of the calcining device 1; The calcining device 1 has the function of adjusting the inclination of the calcining pipe, and the calcining pipe of the calcining device 1 is in a semi-closed state during reciprocating inclination calcination after the shielding plate 74 abuts against the other end of the calcining device 1.

[0043] In the embodiment, the calcining device 1 adopts an electromagnetic calcining furnace, and the calcining pipe is driven and adjusted by a hydraulic cylinder, so that the inclination angle of the calcining pipe can be adjusted according to the needs of use.

[0044] The calcining pipe on the calcining device 1 includes three use states, and the use state is switched by a hydraulic cylinder: Inclined feeding state, the left end of the calcining pipe is higher than the right end, which facilitates feeding from the left end of the calcining pipe, and has the functions of transmitting and calcining the material from left to right in the calcining pipe; Horizontal state, the left end of the calcining pipe is level with the right end, which facilitates constant rolling calcination of the material in the calcining pipe; Inclined discharging state, the left end of the calcining pipe is lower than the right end, which facilitates discharging from the left end of the calcining pipe, and has the functions of transmitting and calcining the material from right to left in the calcining pipe.

[0045] When the calcining pipe is switched back and forth between the inclined feeding state and the inclined discharging state, the material can be reciprocally pushed in the calcining pipe, so that the material can be uniformly calcined.

[0046] The shielding cover 2 and the shielding plate 74 shield the two ends of the calcination tube respectively, so that the two ends of the calcination device 1 are in a semi-closed state; during this period, no matter what state the calcination tube is in, the material can be stably stored inside the calcination tube for calcination, effectively avoiding the problem of material leakage during the reciprocating pushing process of the material.

[0047] In this embodiment, the material is stored in advance in the storage bin 3, the connecting pipe 41 communicates the storage bin 3 and the conveying device 5, and the conveying device 5 is used to convey the material into the calcination tube of the calcination device 1.

[0048] Material reciprocating calcination principle: Before use, install the shielding cover 2 to the right end of the calcination device 1, start the telescopic part 71, the telescopic part 71 drives the connecting plate 72 to move right, the connecting plate 72 drives the elastic support 73 and the shielding plate 74 to move right, and after the shielding plate 74 moves right and abuts against the left end of the calcination device 1, the connecting plate 72 continues to move right and compresses the elastic support 73; when the left end of the calcination device 1 is adjusted obliquely, the elastic support 73 stably abuts against the shielding plate 74, so that the shielding plate 74 maintains abutment with the left end of the calcination device 1, while ensuring the reciprocating pushing function of the material, the material in the calcination process will not leak; When in use, open the connecting pipe 41 through the switch device 6, start the conveying device 5, the conveying device 5 drives the material to be conveyed towards the inside of the calcination device 1, during the conveying process, the two ends of the calcination device 1 maintain a semi-closed state to ensure the stability of the feeding; After feeding is completed, the switch device 6 and the conveying device 5 are closed in turn, the calcination device 1 starts to reciprocally push the material inside, so that the material is calcined more uniformly, avoiding the phenomenon that the end material is not heated uniformly.

[0049] Please refer to Figure 3 and Figure 5 , the conveying device 5 includes a conveying pipe 51, a material receiving port 52, a first driving part 53 and a spiral conveying shaft 54, the conveying pipe 51 is fixedly arranged in the connecting cover 4, the material outlet end of the conveying pipe 51 is inserted into the other end of the calcination device 1, the material receiving port 52 is fixedly connected to the conveying pipe 51, and the material receiving port 52 is aligned with the output end of the connecting pipe 41, the first driving part 53 is fixedly arranged outside the connecting cover 4, the shaft end of the spiral conveying shaft 54 is fixedly connected with the driving part of the first driving part 53 after penetrating the conveying pipe 51 and the connecting cover 4 in sequence, and the spiral conveying shaft 54 is rotatably arranged in the inside of the conveying pipe 51.

[0050] The first driving member 53 is in the form of a motor, which provides power for the rotation of the screw conveying shaft 54, so as to convey the material entering the inside of the conveying pipe 51 to the left end of the calcining device 1.

[0051] Material conveying principle: When it is needed to feed the material to the left end of the calcining device 1, the first driving member 53 is started to drive the screw conveying shaft 54 to rotate, which drives the material entering the conveying pipe 51 to be conveyed towards the inside of the calcining device 1. When the material enters the calcining device 1, the shielding plate 74 maintains abutment with the left end of the calcining device 1, and the calcining device 1 controls the reciprocating inclination of the calcining pipe, so that the material can be uniformly distributed to the inside of the calcining device 1.

[0052] In an optional embodiment of the present embodiment, the switch device 6 can be an electromagnetic flow valve, which is directly installed on the butt joint pipe 41. The opening and closing of the butt joint pipe 41 can be directly controlled by the electromagnetic flow valve.

[0053] In another optional embodiment of the present embodiment, please refer to Figure 3 and Figure 5 , the switch device 6 comprises a rotating pipe 61, a second driving member 62, a gear 63 and an inner gear ring 64. The rotating pipe 61 is rotatably installed in the butt joint cover 4. The fixed part of the second driving member 62 is fixedly arranged outside the butt joint cover 4. The driving part of the second driving member 62 penetrates through the butt joint cover 4 and is fixedly connected with the gear 63. The inner gear ring 64 is fixedly arranged in the rotating pipe 61. The gear 63 is in meshing connection with the inner gear ring 64. The rotating pipe 61 is provided with a switch opening 611. The rotating pipe 61 is in rotational connection with the material receiving port 52. In the initial state, the switch opening 611 is in communication with the butt joint pipe 41 and the material receiving port 52.

[0054] The second driving member 62 is in the form of a motor, which is used to directly drive the gear 63 to rotate. When the gear 63 rotates, the inner gear ring 64 is synchronously driven to rotate, so as to drive the rotating pipe 61 to rotate and adjust, so as to switch the working state of the switch opening 611.

[0055] In the present embodiment, the switch opening 611 comprises three working states: Feeding state: the switch opening 611 faces upwards and is in communication with the butt joint pipe 41 and the material receiving port 52. During this period, the shielding plate 74 maintains abutment with the left end of the calcining device 1, which is used to stably feed the material to the inside of the calcining device 1. The switch opening 611 is in a horizontal position, the rotating tube 61 blocks the docking tube 41 and the material receiving opening 52, and the shielding plate 74 is in abutment with the left end of the calcination device 1, so as to uniformly calcine the material in the calcination device 1; The switch opening 611 is downward and communicates with the discharging tube 42, the rotating tube 61 blocks the docking tube 41 and the material receiving opening 52, and the shielding plate 74 is separated from the calcination device 1, the left end of the calcination device 1 is in an inclined discharging state, so as to facilitate the discharge of the calcined material.

[0056] The second driving member 62 drives the gear 63 to rotate, the gear 63 drives the inner ring gear 64 to rotate, the inner ring gear 64 drives the rotating tube 61 to rotate, and the rotating tube 61 drives the switch opening 611 to rotate; When the switch opening 611 is aligned with the docking tube 41, the docking tube 41 is opened; When the switch opening 611 is separated from the docking tube 41, the docking tube 41 is closed; When the switch opening 611 is aligned with the discharging tube 42, the discharging tube 42 is opened; The docking tube 41 and the material receiving opening 52 are opened and closed, the stable opening and closing control of the input material is realized, and the left end of the calcination device 1 is prevented from leaking material.

[0057] The rotating tube 61 is provided, which also supports the optimization of the subsequent structure.

[0058] The operation principle of the calcination device provided by the embodiment is as follows: A1, before the calcination device 1 is started, the shielding cover 2 is installed at the right end of the calcination device 1; A2, the telescopic member 71 is started, the telescopic member 71 drives the connecting plate 72 to move rightwards, the connecting plate 72 drives the shielding plate 74 to move rightwards through the elastic supporting member 73, until the shielding plate 74 is in abutment with the left end of the calcination device 1, and the elastic supporting member 73 is in a compressed state; A3, the second driving member 62 is started, the second driving member 62 controls the rotating tube 61 to rotate, the rotating tube 61 drives the switch opening 611 to adjust to a feeding state, so that the docking tube 41 is opened, and the material in the storage bin 3 enters the inside of the conveying tube 51 through the docking tube 41 and the material receiving opening 52; Restart the first drive 53, the first drive 53 drives the screw conveyor shaft 54 to rotate, the screw conveyor shaft 54 drives the material conveying in the conveying pipe 51, and the material is conveyed to the inside of the calcining device 1 through the conveying pipe 51; A4, after the material conveying is completed, the rotating pipe 61 is controlled to rotate through the second drive 62, so that the switch opening 611 is switched to the closed state, the calcining device 1 is controlled to reciprocally push the material left and right, so that the material calcination is heated more uniformly, and during the period, the elastic support 73 maintains the abutment of the shielding plate 74 and the left end of the calcining device 1; A5, after the calcination is completed, the connecting plate 72, the elastic support 73 and the shielding plate 74 are integrally moved left and separated from the left end of the calcining device 1 through the telescopic part 71; the switch opening 611 is switched to the discharging state, and finally the calcining device 1 is controlled to discharge, and the material is discharged downward through the discharging pipe 42 and is received and conveyed by a material conveying hopper. Second embodiment

[0059] Please refer to Figures 9 to 10 Based on the first embodiment of the calcining device, the second embodiment of the present application provides another calcining device. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the separate implementation of the first embodiment.

[0060] Specifically, the calcining device provided by the second embodiment of the present application is different in that the storage bin comprises an outer frame 31, a storage rack 32 and an exhaust pipe 33, the storage rack 32 is fixedly arranged on the outer frame 31, a heat exchange cavity 300 is formed between the storage rack 32 and the outer frame 31, and the exhaust pipe 33 is installed on the outer frame 31; the calcining device further comprises a fan 8, the fan 8 is fixedly arranged at the bottom of the outer frame 31, the input end of the fan 8 is fixedly connected to the butt joint cover 4, and a backflow pipe 9 is fixedly connected between the output end of the fan 8 and the outer frame 31, and the backflow pipe 9 is in communication with the heat exchange cavity 300.

[0061] In this embodiment, the fan 8 adopts a heat-resistant fan structure, which can meet the needs of smoke extraction and conveying of the calcining device.

[0062] The storage rack 32 is made of stainless steel metal plate and has good heat conduction and heat exchange performance. The backflow pipe 9 is made of heat-resistant heat preservation pipe material, which is used for stable transmission of flue gas while reducing temperature loss.

[0063] Extraction principle: When the calcination device 1 is used to calcine the material, the smoke generated in the device is discharged from the left end of the calcination device 1 to the docking cover 4 under the shielding of the shielding cover 2. When the smoke needs to be extracted, the fan 8 is started to extract the smoke in the docking cover 4, so that the smoke is transported to the heat exchange cavity 300 through the return pipe 9, and the smoke exchanges heat with the storage rack 32 through the heat exchange cavity 300, which preheats the material in the storage rack 32 and maintains the dryness of the inside of the storage rack 32. The speed of the fan 8 extracting the smoke is slow, which does not affect the natural air circulation in the calcination device 1, guarantees the constant temperature in the calcination device 1, reduces the temperature loss, and makes full use of energy.

[0064] In a preferred mode of the embodiment, the input end of the fan 8 is distributed in a staggered manner with the rotating pipe 61 and directly communicates with the docking cover 4. This facilitates the direct extraction of the smoke in the docking cover 4.

[0065] In an alternative preferred mode of the embodiment, the output end of the exhaust pipe 33 is provided with a smoke dust filtering device.

[0066] The smoke dust filtering device facilitates the filtering of the smoke, reduces the pollution of the direct discharge of the smoke to the air, improves the quality of the smoke discharge, and meets the safety discharge of the tail gas.

[0067] Please refer to Figure 10 , the storage bin 3 further comprises a half partition 34, the half partition 34 is fixedly arranged between the outer frame 31 and the storage rack 32, the return pipe 9 is located below the half partition 34, and the exhaust pipe 33 is located above the half partition 34.

[0068] In the embodiment, the half partition 34 is in a U-shaped structure and is arranged around the outer frame 31 and the storage rack 32, which facilitates the drainage of the smoke input into the heat exchange cavity 300 and increases the sufficiency of the contact of the smoke with the storage rack 32.

[0069] The half partition 34 facilitates the separation of the exhaust pipe 33 and the return pipe 9, so that the smoke input into the heat exchange cavity 300 can uniformly pass through the periphery of the storage rack 32, so that the smoke is fully heat-exchanged with the storage rack 32 before the tail gas is discharged; on the one hand, the influence of the smoke on the environment is reduced, and on the other hand, the waste heat of the smoke is fully utilized to preheat the material in the storage rack 32, and the dryness of the material is maintained.

[0070] In another preferred mode of the embodiment, the input end of the fan 8 is aligned with the rotation range of the switch opening 611, when the switch opening 611 is aligned with the input end of the fan 8, the fan 8 is started and extracts the flue gas in the docking cover 4.

[0071] The input port of the fan 8 is conveniently switched controlled through the switch opening 611 on the rotating pipe 61.

[0072] When the rotating pipe 61 is in the feeding state, the input port of the fan 8 is closed, which facilitates maintaining the stability of natural air circulation when the material is input into the inside of the calcination device 1, and reducing the loss of temperature before calcination; When the rotating pipe 61 is in the closed state, the input port of the fan 8 is opened, which facilitates extracting the flue gas generated during the calcination process after the material is completely input into the inside of the calcination device 1, so that the waste heat of the flue gas can preheat the material in the inside of the storage rack 32, maintain the drying of the material, and fully utilize the flue gas generated during calcination; When the rotating pipe 61 is in the discharging state, the input port of the fan 8 is closed, which maintains the stable discharging of the material after calcination while reducing the loss of air circulation and temperature, and saving the consumption of energy.

[0073] The flue gas conveying principle of the calcination device provided by the embodiment is as follows: B1, when the material is input into the inside of the calcination device 1 through the conveying device 5, the rotating pipe 61 maintains the closing of the input end of the fan 8, which reduces the loss of air circulation and temperature when the material is input into the inside of the calcination device 1, and maintains the stability of temperature in the calcination range; B2, after the material conveying is completed, the second driving member 62 is started, the second driving member 62 drives the gear 63 to rotate, the gear 63 drives the rotating pipe 61 to rotate, and the rotating pipe 61 drives the switch opening 611 to rotate, so that the switch opening 611 is switched from the feeding state to the closed state; At the same time, the switch opening 611 is aligned with the input end of the fan 8, after the fan 8 is started, the flue gas generated during the calcination process can be extracted, and the extracted flue gas can be conveyed into the inside of the heat exchange cavity 300 through the return pipe 9; It is convenient to extract and convey the flue gas generated during the calcination of the material, heat exchange the flue gas through the storage rack 32, preheat and dry the material in the inside of the storage rack 32 after heat exchange, reduce the moisture in the material, and improve the full utilization rate of energy; B3, after the material calcination is completed, the second driving member 62 is started again, the second driving member 62 controls the rotating pipe 61 to rotate, so that the switch opening 611 is switched from the closed state to the discharging state; Start the telescopic part 71, the telescopic part 71 drives the connecting plate 72 to move left, the connecting plate 72 drives the shielding plate 74 to separate from the left end of the calcining device 1 through the elastic support 73, and the calcining device 1 can stably discharge; At the same time, the fan 8 is closed, the left end of the calcining device 1 is maintained in the inclined discharging state, and the calcining device 1 continuously rotates to discharge the material towards the switch opening 611, so that the calcining device 1 stably discharges; B4, after the discharging is completed, the calcining device 1 is restored to the inclined feeding state, the shielding plate 74 is controlled to abut against the left end of the calcining device 1, and the switch opening 611 is controlled to restore to the feeding state, thereby providing support for the calcination of the material next time. Third embodiment

[0074] Please refer to Figure 11 Based on the calcining device provided by the second embodiment of the present application, the third embodiment of the present application provides another calcining device. The third embodiment is only a preferred mode of the first embodiment, and the implementation of the third embodiment does not affect the separate implementation of the first embodiment.

[0075] Specifically, the calcining device provided by the third embodiment of the present application is different in that the telescopic part 71 is a U-shaped sliding shaft structure, and the telescopic part 71 is fixed at the bottom of the rotating pipe 61 after penetrating through the connecting plate 72. The driving part of the second driving part 62 is fixed with a lead screw 621, and the lead screw 621 penetrates through the connecting plate 72 and is screw-connected.

[0076] In the embodiment, the lead screw 621 is parallelly distributed with the sliding part of the telescopic part 71, so that the lead screw 621 can stably drive the connecting plate 72 to move and adjust as a whole during the rotation adjustment.

[0077] Synchronous adjustment principle: When the rotating pipe 61 needs to be switched from the feeding state to the closed state after the conveying device 5 conveys the material into the calcining pipe of the calcining device 1, the second driving part 62 is started, the second driving part 62 drives the gear 63 to rotate, the gear 63 drives the inner gear ring 64 to rotate, the inner gear ring 64 drives the rotating pipe 61 to rotate, the rotating pipe 61 drives the switch opening 611 to rotate, the switch opening 611 is distributed in a staggered manner with the butt joint pipe 41, and the butt joint pipe 41 is closed. When the rotating pipe 61 rotates, the second driving member 62 also drives the wire shaft 621 to rotate synchronously, and the wire shaft 621 drives the connecting plate 72 to move leftwards, and the connecting plate 72 stably slides on the telescopic member 71, and the connecting plate 72 drives the two elastic supporting members 73 to stretch and then maintain the compressed state, and the shielding plate 74 maintains the abutment with the other end of the calcining device 1; After the materials are conveniently input into the inside of the calcining device 1, while the shielding plate 74 abuts against the calcining device 1 to be blocked, the calcining pipe of the calcining device 1 reciprocally tilts and is disturbed, so that the materials stably reciprocally move in the calcining pipe of the calcining device 1 without falling; Similarly, when the materials in the inside of the calcining device 1 are calcined and processed, the second driving member 62 is started again, the second driving member 62 drives the rotating pipe 61 to switch from the closed state to the discharging state, and the switch opening 611 is in abutment and communication with the discharging pipe 42; at the same time, the second driving member 62 drives the wire shaft 621 to rotate synchronously, the wire shaft 621 drives the connecting plate 72, the elastic supporting member 73 and the shielding plate 74 to be separated from the abutment state, so that the shielding plate 74 is separated from the calcining pipe of the calcining device 1, the other end of the calcining pipe of the calcining device 1 is automatically opened in the process that the rotating pipe 61 is switched to the discharging state, the switch opening 611 is located directly below the other end of the calcining device 1, and the materials after calcination are conveniently inclined and discharged.

[0078] The working principle of the method for purifying water resources by using the lithium feldspar lithium carbonate production material after impurity removal is as follows: As shown in Figure 12 (a) and Figure 12 (e), the switch opening 611 is in communication with the abutment pipe 41 and the material receiving opening 52 in the initial state, the elastic supporting member 73 is in the first compressed state, the shielding plate 74 abuts against the other end of the calcining device 1, and the materials in the storage bin 3 are conveniently conveyed into the inside of the calcining device 1 by the conveying device 5; While the materials are conveyed into the inside of the calcining device 1 by the conveying device 5, the calcining pipe on the calcining device 1 is controlled to reciprocally tilt and swing, so as to conveniently convey the materials into the inside of the calcining device 1; Please refer to Figure 12 (a) to Figure 12 (b) and Figure 12 (e) to Figure 12 (f), when the materials injected into the inside of the conveying device 5 by the abutment pipe 41 reach the preset amount, the second driving member 62 is started; The second driving member 62 drives the rotating pipe 61 to switch from the feeding state to the closed state. In the closed state, the input end of the fan 8 is communicated with the docking cover 4 through the switch opening 611. The second driving member 62 drives the connecting plate 72 to move left. At the same time, the elastic supporting member 73 is adaptively stretched to maintain the abutting half-closed of the shielding plate 74 and the other end of the calcining device 1. During the calcination of the material in the calcining device 1, the calcination pipe of the calcining device 1 reciprocatingly inclines and swings to left and right, so that the material is transported and uniformly calcined in the calcining device 1, thereby maintaining the half-closed of the two ends of the calcining device 1 during the left and right transportation of the material, ensuring the uniform heating of the material and avoiding the falling of the material during calcination. During the calcination of the material, the fan 8 is started to extract the flue gas in the docking cover 4 and transport it to the inside of the heat exchange cavity 300. The flue gas is heat-exchanged with the storage rack 32 in the heat exchange cavity 300 to preheat the material in the storage rack 32. The gas after heat exchange is filtered and discharged through the exhaust pipe 33. The gas discharged by the exhaust pipe 33 can also be used as a heat source for drying the raw material, reducing the energy consumption during the drying step of the raw material and fully utilizing the system energy. As shown in Figure 12 (b) and Figure 12 (f), the switch opening 611 is connected to the input end of the fan 8. The docking pipe 41 and the material receiving opening 52 are shielded and closed by the rotating pipe 61. The elastic supporting member 73 is in the second compression state. The shielding plate 74 abuts against the other end of the calcining device 1, facilitating the extraction of the flue gas collected in the docking cover 4 by the fan 8 and the transportation of the flue gas to the inside of the heat exchange cavity 300 to preheat the material in the storage rack 32, maintain the drying of the material and maintain the stability of the reciprocating swing of the material in the calcining device 1. Please refer to Figure 12 (b) to Figure 12 (c) to Figure 12 (d) and Figure 12 (f) to Figure 12 (g) to Figure 12 (h), when the calcination of the material in the calcining device 1 is completed, the second driving member 62 is started. The second driving member 62 drives the rotating pipe 61 to switch from the closed state to the discharging state. The switch opening 611 is communicated with the discharging pipe 42. The fan 8 is closed. The second driving member 62 drives the connecting plate 72 to move left, and the elastic supporting member 73 is adapted to extend and then move left, and the elastic supporting member 73 drives the shielding plate 74 to move left, and the shielding plate 74 is separated from the other end of the calcining device 1, so as to facilitate the opening of the left end of the calcining device 1. Before discharging, a receiving hopper is arranged at the bottom of the discharging pipe 42, and when discharging, the left end of the calcining device 1 is kept inclined downward, and the calcining pipe is continuously rotated, so as to facilitate the leftward conveying of the material in the calcining pipe and the downward discharging of the material from the left end of the calcining device 1, and the material is protected by the docking cover 4 and is not affected by the external air flow, and the temperature loss is less. As shown in Figure 12 As shown in Figure 12 As shown in After discharging, the left end of the calcining device 1 is restored to the state of being inclined upward, and the rotating pipe 61 is switched to the feeding state, and at the same time, the shielding plate 74 is restored to the state of abutting against the left end of the calcining device 1.

[0079] The above only describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made according to the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A method of purifying water resources using a lithium albitite production lithium carbonate impurity-removed material, characterized by, The method comprises the following steps: Step S1, pretreatment of the impurity-removed material, drying the impurity-removed material for producing lithium carbonate from spodumene to generate dried material; Step S2, grinding and crushing the dried material by using a ball mill to generate ground material; Step S3, high-temperature calcination, placing the ground material in a calcination device for calcination treatment to generate calcined material; Step S4, mixing and doping, mixing the calcined material with polyaluminum chloride and polyacrylamide at a certain ratio, fully stirring and mixing them uniformly, and then adding an appropriate amount of water to prepare a suspension; Step S5, preparing granular composite water purifying agent by using a spray drying process.

2. The method of claim 1, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The particle size of the crushed material in step S2 is 50-100 mesh.

3. The method of claim 1, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The temperature of the calcination treatment in step S3 is 500-600°C.

4. The method of claim 3, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The time of the calcination treatment in step S3 is 2-3 hours.

5. The method of claim 1, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The proportion of the calcined material in step S4 is 30-40%, the proportion of polyaluminum chloride is 40-50%, and the proportion of polyacrylamide is 10-20%.

6. The method of claim 1, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The calcination device comprises: a calcination device; a shielding cover, which is sleeved on one end of the calcination device; a storage bin, which is installed above the other end of the calcination device; a docking cover, which is fixedly arranged at the bottom of the storage bin and sleeved on the other end of the calcination device; the top and bottom of the docking cover are respectively provided with a docking pipe and a discharge pipe, the docking pipe is fixedly communicated with the output end of the storage bin, and a switch device is installed on the docking pipe to control the opening and closing of the docking pipe; a conveying device, which is installed on the docking cover, the input end of the conveying device is aligned with the output end of the docking pipe, and the output end of the conveying device is inserted into the other end of the calcination device; a shielding device, which comprises a telescopic member, a connecting plate, two elastic supporting members, and a shielding plate; the fixed part of the telescopic member is fixedly arranged in the docking cover, the telescopic part of the telescopic member is fixedly arranged on the connecting plate, the two ends of each elastic supporting member are hingedly connected to the connecting plate and the shielding plate, respectively, the two elastic supporting members are arranged in parallel from top to bottom, and the shielding plate is slidingly installed in the docking cover and abuts against the other end of the calcination device; wherein the calcination device has the function of adjusting the inclination of the calcination pipe, and the calcination pipe of the calcination device is in a semi-closed state during reciprocating inclination calcination after the shielding plate abuts against the other end of the calcination device.

7. The method of claim 6, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The conveying device comprises a conveying pipe, a receiving port, a first driving member, and a spiral conveying shaft; the conveying pipe is fixedly arranged in the docking cover, the discharge end of the conveying pipe is inserted into the other end of the calcination device, the receiving port is fixedly communicated with the conveying pipe and is aligned with the output end of the docking pipe, the first driving member is fixedly arranged outside the docking cover, the shaft ends of the spiral conveying shaft are fixedly connected with the driving part of the first driving member in sequence after penetrating the conveying pipe and the docking cover from inside to outside, and the spiral conveying shaft is rotatably arranged in the conveying pipe.

8. The method of claim 7, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The switch device comprises a rotating tube, a second driving member, a gear and an inner ring gear, the rotating tube is rotatably installed in the docking cover, the fixed part of the second driving member is fixedly arranged outside the docking cover, the driving part of the second driving member is fixedly connected with the gear after penetrating through the docking cover, the inner ring gear is fixedly arranged in the rotating tube, the gear is meshingly connected with the inner ring gear, and a switch opening is arranged on the rotating tube. The rotating tube is rotatably connected with the material receiving opening, and in the initial state, the switch opening is in communication with the docking pipe and the material receiving opening.

9. The method of claim 8, wherein the lithium albitc production lithium carbonate impurity-removed material is used for purifying water resources. The storage bin comprises an outer frame, a storage rack and an exhaust pipe, the storage rack is fixedly arranged on the outer frame, a heat exchange cavity is formed between the storage rack and the outer frame, and the exhaust pipe is installed on the outer frame; the calcination equipment further comprises a fan, the fan is fixedly arranged at the bottom of the outer frame, the input end of the fan is fixedly connected with the docking cover, a backflow pipe is fixedly connected with the output end of the fan and the outer frame, and the backflow pipe is in communication with the heat exchange cavity.

10. The method of claim 9, wherein the lithium spodumene production lithium carbonate impurity-removed material is used for purifying water resources. The storage bin further comprises a half partition plate, the half partition plate is fixedly arranged between the outer frame and the storage rack, the backflow pipe is located below the half partition plate, and the exhaust pipe is located above the half partition plate.

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