Sagger material sulfuric acid leaching-flotation synergistic lithium extraction and leaching residue multi-stage recycling method

Abstract

The invention provides a sagger material sulfuric acid leaching-flotation collaborative lithium extraction and leached residue multi-stage recycling method, and relates to the technical field of solid waste lithium extraction. A sagger material sulfuric acid leaching-flotation synergistic lithium extraction and leached residue multistage recycling method comprises the following steps that S1, waste sagger pretreatment and stepped temperature control leaching are conducted, H2SO4 is added into a sagger material after waste sagger pretreatment, heating leaching is conducted, and leachate and leached residues are obtained; step S2, purifying the leachate and precipitating lithium phosphate, firstly removing impurities from the leachate through Ca (OH) 2, then adding H3PO4 for phosphoric acid precipitation, and recovering Li3PO4; and S3, the leaching residues are subjected to flotation with a compound collecting agent, the leaching residues are subjected to flotation treatment, and concentrate and tailings are obtained. Lithium is efficiently extracted from the waste saggar, and efficient recovery of lithium is considered; high-value utilization of leaching residues is realized; and the utilization rate of waste sagger resources is increased, discharge of unnecessary waste materials is reduced, and green transformation of the lithium battery industry is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solid waste lithium extraction, and particularly relates to a method for lithium extraction by sulfuric acid leaching-flotation of sagger material and multi-stage resource utilization of leaching residue. BACKGROUND

[0002] With the explosive growth of the lithium ion battery (LIB) industry, the global positive material production has exceeded 3 million tons in 2023, and the annual emission of waste sagger (WBS) generated in the production process exceeds 800,000 tons. The waste sagger is formed into a lithium aluminum silicate (LiAlSi5O6) compound due to long-term contact with excess lithium salt (LiOH) at high temperature melting, and the lithium content is as high as 1.2-2.5% Li2O, which is an important secondary lithium resource. However, more than 90% of the waste sagger in the industry is still treated by simple landfill, causing serious resource waste and environmental risk.

[0003] The current waste sagger treatment technology mainly includes acid leaching, flotation and solidification methods, but their limitations are significant. Although 80-85% of lithium can be extracted by high-temperature leaching with concentrated sulfuric acid, the excessive dissolution of silicon and aluminum skeleton leads to the complete loss of cementing activity of the leaching residue, which cannot be used for building material production. At the same time, the dissolution amount of aluminum, iron and other impurities exceeds 8%, and a large amount of alkali liquor is consumed for subsequent purification, increasing the treatment cost by 35-40%. Therefore, how to effectively improve the recycling rate of resources in the waste sagger needs further research.

[0004] Therefore, it is necessary to provide a method for lithium extraction by sulfuric acid leaching-flotation of sagger material and multi-stage resource utilization of leaching residue to solve the above technical problems. SUMMARY

[0005] The present application provides a method for lithium extraction by sulfuric acid leaching-flotation of sagger material and multi-stage resource utilization of leaching residue, which solves the problem in the related art that how to effectively improve the recycling rate of resources in the waste sagger needs further research.

[0006] To solve the above technical problems, the method for lithium extraction by sulfuric acid leaching-flotation of sagger material and multi-stage resource utilization of leaching residue provided by the present application comprises the following steps:

[0007] The method comprises the following steps:

[0008] Step S1, waste sagger pretreatment and stepwise temperature control leaching, after the waste sagger is pretreated, H2SO4 is added to the sagger material, and leaching is performed under heating to obtain a leaching solution and a leaching residue;

[0009] Step S2, leaching solution purification and lithium phosphate precipitation, the leaching solution is first subjected to impurity removal by Ca(OH)2, and then H3PO4 is added for phosphoric acid precipitation to recover Li3PO4;

[0010] Step S3: The leaching residue is mixed with a collector and floated to obtain concentrate and tailings.

[0011] Step S4: Activation of flotation tailings and preparation of building materials. The tailings and construction waste are mixed and pressed into shape to obtain finished bricks.

[0012] Preferably, the pretreatment of the waste crucibles includes coarse crushing and fine crushing. The coarse crushing is performed by a jaw crusher to crush the waste crucibles to ≤10mm; the fine crushing is performed by a vertical mill to crush them to 200 mesh with a specific surface area >2.5m². 2 / g.

[0013] Preferably, the H2SO4 is diluted to 5±0.5M with a solid-liquid ratio of 1:4±0.1; the first-stage heating temperature is 60±2℃, the stirring rate is 200±10rpm, and the reaction time is 60±5min; the first-stage heating rate is 5℃ / min to 80±2℃, and the reaction time is 60±5min.

[0014] Preferably, the leachate index is: Li + Concentration 12000-15000 mg / L, Al 3+ Dissolution rate <3%.

[0015] Preferably, in step S2, pH adjustment and filtration are performed sequentially during impurity removal: the pH adjustment involves adding Ca(OH)₂ powder to the leachate to adjust the pH of the leachate to 5.0 ± 0.2, thereby precipitating Fe. 3+ Al 3+ .

[0016] Preferably, the filtration is performed using a plate and frame filter press to separate the filtrate, resulting in impurity residue of <50ppm.

[0017] Preferably, in step S2, the phosphoric acid precipitate is prepared by diluting 85% H3PO3 to a concentration of 10% and adding it dropwise with 20% NaOH solution at a molar ratio of 1:2.5; the reaction conditions are controlled at 25±5℃, the stirring rate is controlled at 150rpm, and the final pH is 10.8±0.1.

[0018] Preferably, the flotation of leaching residue with a compound collector in step S3 mainly includes pulp preparation and flotation treatment. The pulp preparation involves mixing leaching residue and deionized water at a solid-liquid ratio of 1:1.2, ball milling to a 200-mesh density of ≥80%, adjusting the pulp concentration to 35±2%, and maintaining a temperature of 25-30℃.

[0019] The flotation process includes roughing, scavenging, and cleaning: during roughing, the total amount of collector used is 1.0-1.4 kg / ton of slag, and the flotation time is 5±1 min; during scavenging, 0.2-0.3 kg / ton of collector is added, and the flotation time is 3±0.5 min; the cleaning time is 2 min, and a lithium concentrate grade of 4.0-4.5% Li2O is obtained.

[0020] Preferably, the activation and building material preparation of flotation tailings in step S4 includes activation treatment and molding treatment, wherein the activation treatment includes:

[0021] Mixed activation: The dry tailings are uniformly mixed with CaO and silica fume;

[0022] Steam curing: Curing at 60±2℃ and humidity ≥95% for 36±1h.

[0023] Preferably, the molding process includes:

[0024] Raw material ratio: 60% activated tailings + 40% construction waste;

[0025] Compression molding: pressure 25±0.5MPa, holding time 30±2s, brick size 240×115×53mm;

[0026] Natural curing: Temperature 25±5℃, humidity 60±10%, compressive strength ≥30MPa after 28 days of curing.

[0027] Compared with related technologies, the method for synergistic lithium extraction from sagger material by sulfuric acid leaching-flotation and multi-stage resource utilization of leaching residue provided by the present invention has the following beneficial effects:

[0028] By efficiently extracting lithium from waste crucibles, a synergistic process is achieved that balances efficient lithium recovery, high-value utilization of leaching residue, and low-cost operation. This improves the utilization rate of waste crucible resources, reduces the emission of unnecessary waste, and realizes the green transformation of the lithium battery industry. Attached Figure Description

[0029] 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.

[0030] Figure 1 A three-dimensional diagram of the first embodiment of the method for synergistic lithium extraction from crucible material by sulfuric acid leaching-flotation and multi-stage resource utilization of leaching residue provided by the present invention;

[0031] Figure 2 for Figure 1A sectional view of section AA shown;

[0032] Figure 3 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0033] Figure 4 A three-dimensional view of the first embodiment of the flotation machine provided by the present invention;

[0034] Figure 5 for Figure 4 The front view of the cross-sectional structure of the chassis shown;

[0035] Figure 6 for Figure 4 Right view of the cross-sectional structure of the chassis shown;

[0036] Figure 7 This is a schematic diagram of the first embodiment of the flotation machine provided by the present invention, wherein, Figure 7 (a) is a schematic diagram of the structure of the telescopic tube in its contracted state. Figure 7 (b) is a schematic diagram of the scraper moving from the right side to the left side;

[0037] Figure 8 This is a schematic diagram of the structure of a second embodiment of the flotation machine provided by the present invention;

[0038] Figure 9 for Figure 8 A top view of the internal structure of the support frame shown;

[0039] Figure 10 A three-dimensional view of a third embodiment of the flotation machine provided by the present invention;

[0040] Figure 11 for Figure 10 The diagram shows the structure during the upward movement of the telescopic tube.

[0041] Figure 12 for Figure 11 The diagram shows the structure of the telescopic tube moving upwards to the retracted state.

[0042] Explanation of icon numbers:

[0043] 1. Chassis; 101. Switch hole; 102. Adjustment hole;

[0044] 2. Switching device; 21. Switch plate; 22. First telescopic component;

[0045] 3. Air flotation device; 31. Mounting bracket; 311. Synchronization plate; 32. Support pipe; 321. Telescopic pipe; 33. First driving component; 34. First transmission component; 35. Second telescopic component;

[0046] 4. Moving device; 41. Support frame; 411. Reinforcing support plate; 42. Second driving component; 43. Second transmission component;

[0047] 5. Scraper; 51. Synchronizing rod;

[0048] 6. Third telescopic component.

[0049] 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

[0050] 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.

[0051] This invention provides a method for the synergistic lithium extraction from sagger material via sulfuric acid leaching and flotation, and for the multi-stage resource utilization of leaching residue. Please refer to the following reference. Figures 1 to 3 The present invention provides a method for the synergistic lithium extraction from sagger material via sulfuric acid leaching and flotation, and the multi-stage resource utilization of leaching residue, comprising the following steps:

[0052] Step S1, waste sagger pretreatment and stepped temperature controlled leaching: after waste sagger pretreatment, H2SO4 is added to the sagger material and heated for leaching to obtain leachate and leaching residue.

[0053] Step S2, Leachate purification and lithium phosphate precipitation: The leachate is first passed through Ca(OH)2 to remove impurities, and then H3PO4 is added to precipitate phosphoric acid and recover Li3PO4.

[0054] Step S3: The leaching residue is mixed with a collector and floated to obtain concentrate and tailings.

[0055] Step S4: Activation of flotation tailings and preparation of building materials. The tailings and construction waste are mixed and pressed into shape to obtain finished bricks.

[0056] By efficiently extracting lithium from waste crucibles, a synergistic process is achieved that balances efficient lithium recovery, high-value utilization of leaching residue, and low-cost operation. This improves the utilization rate of waste crucible resources, reduces the emission of unnecessary waste, and realizes the green transformation of the lithium battery industry.

[0057] Specifically, the pretreatment of the waste crucibles includes coarse crushing and fine crushing. The coarse crushing is performed by a jaw crusher to crush the waste crucibles to ≤10mm; the fine crushing is performed by a vertical mill to 200 mesh (particle size ≤75μm) with a specific surface area >2.5m². 2 / g.

[0058] Specifically, the H2SO4 (98%) is diluted to 5±0.5M with a solid-liquid ratio of 1:4±0.1; the first stage heating temperature is 60±2℃, the stirring rate is 200±10rpm, and the reaction time is 60±5min; the first stage heating rate is 5℃ / min to 80±2℃, and the reaction time is 60±5min.

[0059] In this embodiment, the leachate index is: Li + Concentration 12000-15000 mg / L, Al 3+ Dissolution rate <3%.

[0060] Specifically, the impurity removal process involves sequential pH adjustment and filtration: the pH adjustment is achieved by adding Ca(OH)₂ powder to the leachate to adjust the pH to 5.0 ± 0.2, thus precipitating Fe. 3+ Al 3+ ;

[0061] The filtration process uses a plate and frame filter press (pressure 0.5MPa) to separate the filtrate, resulting in impurity residue of <50ppm.

[0062] Specifically, in step S2, the phosphoric acid precipitate is prepared by diluting 85% H3PO3 to a concentration of 10% and adding it dropwise with 20% NaOH solution at a molar ratio of 1:2.5; the reaction conditions are controlled at 25±5℃, the stirring rate is controlled at 150rpm, and the final pH is 10.8±0.1.

[0063] Achieving an H3PO3 recovery rate of 82-87% and a purity of ≥95%, significantly improving precipitation efficiency while ensuring the purity and recyclability of H3PO3.

[0064] Specifically, the flotation of leaching residue with a compound collector in step S3 mainly includes pulp preparation and flotation treatment. The pulp preparation involves mixing leaching residue and deionized water at a solid-liquid ratio of 1:1.2, ball milling to a 200-mesh density of ≥80%, and adjusting the pulp concentration to 35±2% at a temperature of 25-30℃.

[0065] The flotation process includes roughing, scavenging, and cleaning: during roughing, the total amount of collector used is 1.0-1.4 kg / ton of slag, and the flotation time is 5±1 min; during scavenging, 0.2-0.3 kg / ton of collector is added, and the flotation time is 3±0.5 min; the cleaning time is 2 min, and a lithium concentrate grade of 4.0-4.5% Li2O is obtained.

[0066] Specifically, step S4, the activation of flotation tailings and the preparation of building materials, includes activation treatment and molding treatment. The activation treatment includes:

[0067] Mixed activation: The dry tailings are uniformly mixed with CaO (4%) and silica fume (3%);

[0068] Steam curing: Curing at 60±2℃ and humidity ≥95% for 36±1h;

[0069] The molding process includes:

[0070] Raw material ratio: 60% activated tailings + 40% construction waste (red brick powder: concrete debris = 4:1);

[0071] Compression molding: pressure 25±0.5MPa, holding time 30±2s, brick size 240×115×53mm;

[0072] Natural curing: Temperature 25±5℃, humidity 60±10%, compressive strength ≥30MPa after 28 days of curing.

[0073] Ultimately, while recovering lithium resources from waste, the leaching residue can also be utilized. After the tailings are combined with construction waste, activated and shaped, finished bricks can be produced, realizing the comprehensive recycling and utilization of waste sagger materials and reducing waste emissions.

[0074] The present invention also provides a flotation machine for flotation treatment of leaching residue in the aforementioned method for synergistic lithium extraction from sagger material by sulfuric acid leaching-flotation and multi-stage resource utilization of leaching residue.

[0075] First embodiment:

[0076] Please refer to the following: Figures 4 to 6 In a first embodiment of the present invention, the flotation machine includes:

[0077] The chassis 1 has a switch hole 101.

[0078] A switching device 2, comprising a switch plate 21 and a first telescopic member 22, wherein the switch plate 21 is slidably mounted on the chassis 1 and aligned with the switch hole 101, and both ends of the first telescopic member 22 are fixedly connected to the chassis 1 and the switch plate 21;

[0079] The air flotation device 3 includes a mounting bracket 31, a support tube 32, a telescopic tube 321, a first driving component 33, a first transmission component 34, and a second telescopic component 35. The mounting bracket 31 is mounted on the top of the housing 1. The support tube 32 passes through the housing 1 and is rotatably connected. The telescopic tube 321 is sleeved on the bottom of the support tube 32 and is connected by a sliding key. The fixed part of the second telescopic component 35 is fixedly connected to the mounting bracket 31. The telescopic part of the second telescopic component 35 passes through the mounting bracket 31 and is connected to the telescopic tube 321. The telescopic tube 321 is rotatably mounted on the telescopic part of the second telescopic component 35. The bottom of the first driving component 33 is fixed on the mounting bracket 31. The first transmission component 34 is operatively connected to the driving part of the first driving component 33 and the support tube 32.

[0080] Scraper 5, which is slidably installed inside the housing 1, and a moving device 4 is installed on the housing 1. The moving device 4 is connected to the scraper 5 and is used to drive the scraper 5 to move and adjust.

[0081] When the telescopic tube 321 retracts, the bottom of the telescopic tube 321 is misaligned with the moving range of the scraper 5.

[0082] The top opening of the casing 1 provides space for the addition of materials and for the installation of the air flotation device 3.

[0083] "Sliding key connection" means that the telescopic tube 321 can slide up and down relative to the support tube 32, but cannot rotate relative to each other; so that when the support tube 32 rotates, it can synchronously drive the telescopic tube 321 to rotate synchronously, and when the telescopic tube 321 rotates, it can be stably rotated and adjusted at the telescopic part of the second telescopic member 35.

[0084] The telescopic tube 321 and the support tube 32 are interconnected, so that the gas entering the support tube 32 can be blown out from the bottom of the telescopic tube 321.

[0085] In this embodiment, the top end of the support tube 32 is rotatably connected to the air flotation output port, and the bottom of the telescopic tube 321 is provided with a flow divider to evenly distribute the input air into the solution inside the casing 1. During the continuous input of air, the first drive member 33 can drive the support tube 32 to rotate through the first transmission member 34, which facilitates the rotation of the air flotation and realizes the flotation treatment of the solution inside the casing 1.

[0086] In this embodiment, the first telescopic member 22 is a hydraulic telescopic rod used to drive the switch plate 21 to rise and fall; when the switch plate 21 moves down and blocks the switch hole 101, the switch hole 101 is closed; when the switch plate 21 moves up and is not blocked by the switch hole 101, the switch hole 101 is opened.

[0087] The second telescopic component 35 is a hydraulic telescopic rod used to drive the telescopic tube 321 to extend and retract.

[0088] In this embodiment, the telescopic tube 321 includes two usage states:

[0089] In an extended state, such as Figure 6 As shown, the telescopic tube 321 extends fully relative to the support tube 32 and is inserted into the solution range inside the casing 1, which facilitates the flotation treatment of the solution inside the casing 1.

[0090] Contraction state, such as Figure 7 As shown in (a), the telescopic tube 321 is fully retracted relative to the support tube 32 and moves above the moving range of the scraper 5 to provide clearance for the movement of the scraper 5.

[0091] See also Figure 6 and Figure 7 Equipment operating principle:

[0092] When maintenance is required on the sludge after flotation treatment inside the casing 1, firstly, the first telescopic component 22 is activated, which moves the switch plate 21 upward, opening the switch hole 101; then, the second telescopic component 35 is activated, which moves the telescopic tube 321 upward, switching it from an extended state to a retracted state to allow for subsequent movement and adjustment of the scraper 5; finally, the moving device 4 is activated, which moves the scraper 5 inside the casing 1, pushing the sludge inside the casing 1 out through the opened switch hole 101, facilitating maintenance inside the casing 1.

[0093] While ensuring the equipment can perform normal flotation processing, the scraper 5 can also push and discharge the sludge inside the casing 1 during the equipment discharge process, reducing maintenance costs and improving work efficiency.

[0094] Please refer to it again. Figure 5 Two switch holes 101 are provided, and the two switch holes 101 are symmetrically arranged on both sides of the chassis 1. The number of switch holes 101, switch plate 21 and first telescopic member 22 are equal, and the switch holes 101 and switch plate 21 are arranged in a one-to-one correspondence.

[0095] This allows the switch holes 101 on both sides of the housing 1 to be opened. By moving the scraper 5 toward the opened switch holes 101, material can be discharged without the need for repeated movement and adjustment of the scraper 5.

[0096] Please refer to the following: Figure 1 The top of the chassis 1 is provided with an adjustment hole 102, and the moving device 4 is installed within the range of the adjustment hole 102;

[0097] The mobile device 4 includes a support frame 41, a second driving member 42, and a second transmission member 43. The support frame 41 is mounted on the chassis 1, the second driving member 42 is mounted on the support frame 41, and the second transmission member 43 is rotatably mounted inside the support frame 41. The drive shaft of the second driving member 42 passes through the support frame 41 and is fixedly connected to the rotating shaft of the second transmission member 43.

[0098] The top of the scraper 5 is fixed with a synchronizing rod 51, the top of which is inserted into the range of the adjusting hole 102 and connected to one side of the transmission part of the second transmission member 43.

[0099] In this embodiment, the second driving component 42 is a motor structure used to drive the second transmission component 43 to rotate and adjust. The second transmission component 43 consists of a transmission belt and two transmission wheels. The transmission belt drives and connects the two transmission wheels. Any one of the transmission wheels is fixedly connected to the driving part of the second driving component 42. The transmission belt is connected to the synchronizing rod 51. When the second driving component 42 drives the transmission wheel to rotate, the transmission wheel drives the transmission belt to rotate. The transmission belt drives the synchronizing rod 51 to move, providing stable support for the movement adjustment of the scraper 5.

[0100] The second driving member 42 facilitates the rotation of the second transmission member 43. When the second transmission member 43 rotates, the rotating part synchronously drives the synchronizing rod 51 to move within the range of the adjusting hole 102. When the synchronizing rod 51 moves, it drives the scraper 5 to move as a whole, thereby stably driving the scraper 5 to move and adjust inside the housing 1.

[0101] Preferably, two parallel sliding shafts (not shown in the figure) are fixed inside the housing 1. These sliding shafts pass through the scraper 5 and are slidably connected. The installation direction of the sliding shafts is the same as the moving direction of the scraper 5. This further increases the stability of the scraper 5 as it moves within the housing 1.

[0102] The working principle of the flotation machine provided in this embodiment is as follows:

[0103] A1. When the equipment is running, the switch plate 21 is moved down and closed at the switch hole 101 by the first telescopic member 22. The material to be floated is added from the top of the chassis 1. The first drive member 33 is started. The first drive member 33 drives the support tube 32 to rotate through the first transmission member 34. The support tube 32 drives the telescopic tube 321 to rotate synchronously. The telescopic tube 321 is stably rotated and adjusted at the telescopic end of the second telescopic member 35 to achieve comprehensive rotational air flotation treatment within the chassis 1.

[0104] A2, such as Figure 7 As shown in (a), when the air flotation treatment is completed and the sediment inside the casing 1 needs to be cleaned, the first drive component 33 is turned off and the second telescopic component 35 is activated. The second telescopic component 35 drives the telescopic tube 321 to move upward. The telescopic tube 321 retracts and moves upward to above the moving range of the scraper 5, providing clearance for the movement of the scraper 5. The first telescopic component 22 drives the switch plate 21 to move upward. After the switch plate 21 moves upward, the switch hole 101 on the left side of the casing 1 opens.

[0105] A3, combined Figure 5 and Figure 7 (b) Start the second drive component 42. The second drive component 42 drives the second transmission component 43 to rotate. The second transmission component 43 drives the synchronous rod 51 to move to the left. While the synchronous rod 51 moves to the left, it also drives the scraper 5 to move to the left. While the scraper 5 moves to the left, it pushes and cleans the sediment at the bottom of the chassis 1, so that the sediment is quickly pushed along the inside of the chassis 1 to the position of the switch hole 101, so as to facilitate the quick cleaning and maintenance of the sediment.

[0106] A4. After the scraper 5 moves to the left side of the housing 1, without controlling the scraper 5 to reset, the first telescopic component 22 is activated. The first telescopic component 22 drives the switch plate 21 to move down and close the switch hole 101 on the left side of the housing 1. Then the second telescopic component 35 is activated. The second telescopic component 35 drives the telescopic tube 321 to move down. The telescopic tube 321 resets from the contracted state to the extended state to facilitate continuous air flotation treatment of the equipment and reduce downtime.

[0107] Second embodiment:

[0108] Please refer to the following: Figures 8 to 9 Based on the flotation machine provided in the first embodiment of the present invention, the second embodiment of the present invention proposes another flotation machine. 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.

[0109] Specifically, the difference in the flotation machine provided in the second embodiment of the present invention is that the mounting bracket 31 is slidably mounted on the housing 1, and a synchronization plate 311 is fixedly provided at one end of the mounting bracket 31. The synchronization plate 311 is aligned with the range of the transmission part on the other side of the second transmission member 43.

[0110] The support frame 41 is slidably mounted on the chassis 1;

[0111] The flotation machine also includes a third telescopic component 6, the two ends of which are fixedly connected to the casing 1 and the support frame 41.

[0112] In this embodiment, the second transmission component 43 includes two usage modes:

[0113] In the cleaning movement mode, the transmission part of the second transmission member 43 abuts against the synchronous rod 51. When the second drive member 42 drives the second transmission member 43 to operate, the synchronous rod 51 moves synchronously to drive the scraper 5 to move along the bottom of the chassis 1 to clean the sediment at the bottom of the chassis 1. The corresponding switch hole 101 needs to be opened in advance.

[0114] In the air flotation moving mode, the transmission part of the second transmission member 43 abuts against the synchronous plate 311. When the second driving member 42 drives the second transmission member 43 to operate, the synchronous plate 311 moves to drive the entire mounting bracket 31 to slide along the inside of the housing 1, thereby driving the telescopic tube 321 in the extended state to move and adjust, so as to carry out air flotation treatment at different points and improve the sufficiency and efficiency of flotation.

[0115] In this embodiment, the third telescopic member 6 can be any one of an electric telescopic rod, a telescopic pneumatic rod, or a hydraulic telescopic rod, used to directly drive the movement of the support frame 41, thereby switching the usage mode of the second transmission member 43.

[0116] The third telescopic component 6 facilitates the overall movement and adjustment of the support frame 41 to switch the usage mode of the second transmission component 43.

[0117] The second drive unit 42 can drive the scraper 5 to move during the cleaning movement mode to push the sediment to the corresponding switch hole 101, which facilitates the discharge and cleaning of the machine box 1;

[0118] The second drive unit 42 can also drive the telescopic tube 321 to move and adjust within the housing 1 in the air flotation movement mode, so as to facilitate switching the air flotation treatment point of the telescopic tube 321 and improve the efficiency of air flotation treatment.

[0119] Please refer to it again. Figure 9The support frame 41 has two parallel reinforcing support plates 411 fixed inside, and the reinforcing support plates 411 slide in contact with the transmission part of the second transmission member 43.

[0120] The transmission part of the second transmission member 43 provides stable support and limiting function for the transmission part to drive the synchronous rod 51 or the synchronous plate 311 to move and adjust, so that the transmission part of the second transmission member 43 can stably drive the synchronous rod 51 or the synchronous plate 311 to move when moving.

[0121] Please refer to it again. Figure 9 The transmission part of the second transmission component 43 is provided with a toothed structure, and the synchronous rod 51 and the synchronous plate 311 are both provided with corresponding toothed structures, which are provided in correspondence with the toothed structure.

[0122] This increases the stability of the transmission part of the second transmission component 43 after it is connected to any of the synchronization rods 51 and the synchronization plate 311.

[0123] The working principle of the flotation machine provided in this embodiment:

[0124] B1, such as Figure 8 As shown, when it is necessary to move and adjust the air flotation point of the telescopic tube 321, the third telescopic component 6 is activated first. The third telescopic component 6 drives the support frame 41 to move. The support frame 41 drives the second driving component 42 and the second transmission component 43 to move. The second transmission component 43 separates from the synchronous plate 311. Then, the second transmission component 43 abuts and engages with the synchronous plate 311, so that the second transmission component 43 switches from the cleaning movement mode to the air flotation movement mode.

[0125] B2, when it is necessary to control the movement and adjustment of the telescopic tube 321, the second drive component 42 is activated. The second drive component 42 drives the second transmission component 43 to rotate and transmit. The second transmission component 43 drives the synchronous plate 311, which is engaged, to move. The synchronous plate 311 drives the support tube 32 and the telescopic tube 321 to slide along the top of the housing 1, thereby enabling the output end of the telescopic tube 321 to perform flotation operations at different points.

[0126] B3. After the flotation operation is completed, the third telescopic component 6 is activated again to control the second transmission component 43 to switch from the air flotation moving mode to the cleaning moving mode. Then the second drive component 42 is activated. The second drive component 42 drives the synchronous rod 51 to move through the second transmission component 43. The synchronous rod 51 drives the scraper 5 to move inside the housing 1 and pushes the sediment toward the opened adjustment hole 102 to be pushed out.

[0127] Third embodiment:

[0128] Please refer to it again. Figure 10 Based on the flotation machine provided in the second embodiment of the present invention, the third embodiment of the present invention proposes another flotation machine. 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.

[0129] Specifically, the flotation machine provided in the third embodiment of the present invention differs in that the third telescopic member 6 is a spring-supported tube structure, and the two ends of the third telescopic member 6 are respectively hinged to the telescopic tube 321 and the support frame 41; when the telescopic tube 321 is in the extended state, the third telescopic member 6 synchronously controls the second transmission member 43 to dock with the synchronous plate 311; when the telescopic tube 321 is in the retracted state, the third telescopic member 6 synchronously controls the second transmission member 43 to abut against the synchronous rod 51.

[0130] In this embodiment, when the telescopic tube 321 is in the extended state, the third telescopic member 6 is in the fully extended state, that is, the third telescopic member 6 cannot continue to extend, so as to maintain the stability of the contact state between the transmission part of the second transmission member 43 and the synchronous plate 311, thereby ensuring the stability of the second transmission member 43 driving the synchronous plate 311 and the mounting bracket 31 to move as a whole.

[0131] When the telescopic tube 321 is in the retracted state, the third telescopic member 6 is in the fully retracted state, that is, the third telescopic member 6 cannot continue to retract, so as to maintain the stability of the contact state between the transmission part of the second transmission member 43 and the synchronous rod 51, thereby ensuring the stability of the second transmission member 43 driving the synchronous rod 51 and the scraper 5 as a whole.

[0132] See also Figures 10 to 11 to Figure 12 The synchronous adjustment principle of the telescopic tube 321 and the support frame 41 is as follows: When the scraper 5 is needed to push and clean the sediment inside the chassis 1, the second telescopic component 35 is activated first. The second telescopic component 35 drives the telescopic tube 321 to move upward, and the telescopic tube 321 retracts to avoid the scraper 5 that is about to move. At the same time, the telescopic tube 321 pushes the support frame 41 to the left through the third telescopic component 6. The support frame 41 drives the second transmission component 43, i.e., the second driving component 42, to move to the left as a whole. The transmission part of the second transmission component 43 first separates from the synchronous plate 311 and then abuts against the synchronous rod 51 until the telescopic tube 321 completely switches from the extended state to the retracted state. This is so that during the process of the telescopic tube 321 completely switching from the extended state to the retracted state, the second transmission component 43 is synchronously controlled to switch from the moving air flotation mode to the moving cleaning mode.

[0133] Similarly, during the process of the telescopic tube 321 switching completely from the retracted state to the extended state, the second transmission component 43 is simultaneously controlled to switch from the air flotation movement mode to the cleaning movement mode.

[0134] The working principle of the flotation machine provided in this embodiment is as follows:

[0135] C1, such as Figure 10 As shown, it can be defined that in the initial state, the telescopic tube 321 is in the extended state, the second transmission member 43 is in the air-floating movement mode, and when the second drive member 42 drives the second transmission member 43 to run, the transmission part of the second transmission member 43 drives the synchronous plate 311 to move synchronously, the synchronous plate 311 drives the mounting bracket 31 to move synchronously, and the mounting bracket 31 drives the support tube 32, i.e. the telescopic tube 321, to move as a whole, so as to facilitate air-floating at different points in the chassis 1;

[0136] C2, after flotation is completed, the second telescopic component 35 is activated. The second telescopic component 35 drives the telescopic tube 321 to move upward. The telescopic tube 321 moves upward and retracts onto the support tube 32, providing clearance space for the movement of the scraper 5.

[0137] C3, see reference Figures 10 to 11 to Figure 12 During the process of the telescopic tube 321 switching from the extended state to the retracted state, the telescopic tube 321 first pushes the support frame 41 to the left through the third telescopic member 6. The support frame 41 drives the second driving member 42 and the second transmission member 43 to move to the left as a whole. The second transmission member 43 separates from the synchronous plate 311 on the one hand and abuts against the synchronous rod 51 on the other hand. After that, the telescopic tube 321 continues to move upward and compress the third telescopic member 6 until the third telescopic member 6 is in a fully retracted state, so as to maintain the stability of the connection and movement of the second transmission member 43 and the synchronous rod 51.

[0138] C4, start the second drive unit 42. When the second drive unit 42 drives the second transmission unit 43 to run, the transmission part of the second transmission unit 43 drives the synchronous rod 51 to move. When the synchronous rod 51 moves, it drives the scraper 5 to move. When the scraper 5 moves, it moves, pushes and discharges the sludge inside the casing 1.

[0139] 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 synergistic lithium extraction from sintered material by sulfuric acid leaching-flotation and multi-stage resource utilization of leaching residue, characterized in that, The method comprises the following steps: Step S1, pre-treatment of the spent sagger and stepwise temperature control leaching, H2SO4 is added to the spent sagger after pre-treatment, and leaching is performed under heating to obtain leaching solution and leaching residue; Step S2, purification of the leaching solution and lithium phosphate precipitation, the leaching solution is first subjected to impurity removal by Ca(OH)2, and then subjected to phosphate precipitation by adding H3PO4 to recover Li3PO4; Step S3, leaching residue recombined collector flotation, the leaching residue is subjected to flotation treatment to obtain concentrate and tailings; Step S4, activation of the flotation tailings and preparation of building materials, the tailings are mixed with construction waste and then subjected to pressing molding to obtain finished bricks.

2. The sintering material sulfuric acid leaching-flotation synergistic lithium extraction and leaching residue multi-stage resource utilization method according to claim 1, characterized in that, The pre-treatment of the spent sagger includes coarse crushing and fine crushing, the coarse crushing is to crush the spent sagger to ≤10 mm by a jaw crusher; the fine crushing is to crush to 200 mesh by a vertical mill, specific surface area >2.5 m 2 / g.

3. The method for synergistic lithium extraction from sagger material via sulfuric acid leaching and flotation, and for multi-stage resource utilization of leaching residue, as described in claim 1, is characterized in that... The H2SO4 is diluted to 5±0.5M, the solid-liquid ratio is 1:4±0.1, the first-stage heating temperature is 60±2℃, the stirring rate is 200±10rpm, and the reaction time is 60±5min; the first-stage heating rate is 5℃ / min to 80±2℃, and the reaction time is 60±5min.

4. The method for synergistic lithium extraction from sagger material via sulfuric acid leaching and flotation, and for multi-stage resource utilization of leaching residue, as described in claim 3, is characterized in that... Leaching solution indicator: Li + Concentration 12000-15000 mg / L, Al 3+ Dissolution rate < 3%.

5. The sintering-pelletizing process for lithium extraction from sintered ore and multi-stage resource utilization of leaching residue according to claim 1, characterized in that, The impurity removal in step S2 is performed by pH adjustment and filtration in sequence: the pH adjustment uses Ca(OH)2 powder added to the leaching solution, so that the leaching solution is adjusted to pH 5.0±0.2, and Fe 3+ , Al 3+ is precipitated.

6. The sintering pallet material sulfuric acid leaching-flotation synergistic lithium extraction and leaching residue multi-stage resource utilization method according to claim 5, characterized in that, The filtration adopts a plate-and-frame filter press to separate the filtrate, so that the impurity residue is less than 50ppm.

7. The method for synergistic lithium extraction from sagger material via sulfuric acid leaching and flotation, and for multi-stage resource utilization of leaching residue, as described in claim 1, is characterized in that... In the step S2, the phosphate precipitation adopts 85% H3PO3 diluted to 10% concentration, and 20% NaOH solution is added dropwise at a molar ratio of 1:2.5; the reaction condition is controlled to be 25±5℃, the stirring rate is controlled to be 150rpm, and the end-point pH is 10.8±0.

1.

8. The sintering pallet material sulfuric acid leaching-flotation synergistic lithium extraction and leaching residue multi-stage resource utilization method according to claim 7, characterized in that, In the step S3, the leaching residue recombined collector flotation mainly includes slurry preparation and flotation treatment, the slurry preparation adopts mixing of the leaching residue and deionized water at a solid-liquid ratio of 1:1.2, and ball milling to 200 mesh with a proportion of ≥80%; the slurry concentration is adjusted to 35±2%, and the temperature is 25-30℃; The flotation treatment includes roughing, scavenging and cleaning: the total amount of collector in the roughing is 1.0-1.4kg / ton of residue, and the flotation time is 5±1min; the scavenging supplement collector is 0.2-0.3kg / ton of residue, and the flotation time is 3±0.5min; the cleaning time is 2min, and the lithium concentrate grade is 4.0-4.5% Li2O.

9. The sintering-pelletizing sintering process according to claim 8, characterized in that, In the step S4, the flotation tailings activation and building material preparation include activation treatment and molding treatment, and the activation treatment includes: Mixed activation: uniformly mixing the dry tailings with CaO and silica fume; Steam curing: curing at 60±2℃ and humidity of ≥95% for 36±1h.

10. The sintering pallet material sulfuric acid leaching-flotation synergistic lithium extraction and leaching residue multi-stage resource utilization method according to claim 9, characterized in that, The molding treatment includes: Raw material ratio: activated tailings 60%+construction waste 40%; Pressing molding: pressure 25±0.5MPa, pressure maintaining time 30±2s, and brick size 240×115×53mm; Natural curing: temperature 25±5℃, humidity 60±10%, and compressive strength ≥30MPa after curing for 28 days.

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