Acid mixing equipment and lithium salt preparation system
By designing a conveying mechanism and a stirring structure in the mixed acid equipment, the problem of uneven mixing of roasted fine powder and concentrated sulfuric acid was solved, uniform mixing and stable operation were achieved, and the production efficiency and product quality of the lithium salt preparation system were improved.
Patent Information
- Application Number
- CN202422639112.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The roasted fine powder and concentrated sulfuric acid cannot be fully and evenly mixed in the mixed acid equipment, which easily generates agglomerated materials and affects the subsequent reaction effect.
A mixed acid equipment is designed, including a shell and a conveying mechanism. The shell has a feed port and a discharge port. The conveying mechanism consists of a stirring structure, which is used to convey the mixture and stir and mix it in the shell. The mixture accumulates at the baffle to extend the residence time and ensure uniform mixing.
The uniform mixing of roasted fine powder and acid solution is achieved, agglomeration is avoided, the particle size of the mixture is uniform and stable, the equipment operates reliably, and the production efficiency and product quality are improved.
Smart Images
Figure CN223324372U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium salt preparation equipment, and in particular to a mixed acid device and a lithium salt preparation system. Background Art
[0002] In the traditional sulfuric acid process for extracting lithium from ore to produce lithium salts, the lithium ore is typically first subjected to high-temperature transformation and then ground in a grinding device to form a calcined fine powder. The calcined fine powder is then uniformly mixed with concentrated sulfuric acid in a mixing acid device at a specific ratio. The resulting mixture of lithium ore and sulfuric acid is then heated in an acidification reactor (typically a rotary kiln) to induce a chemical reaction between the lithium ore and the sulfuric acid.
[0003] However, in the prior art, the roasted fine powder and concentrated sulfuric acid cannot be fully and evenly mixed in the acid mixing equipment, and agglomerates are easily generated, thereby affecting the subsequent reaction effect.
[0004] In view of this, the present utility model is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a mixed acid device and a lithium salt preparation system to solve or improve the above technical problems.
[0006] The utility model can be achieved like this:
[0007] In a first aspect, the present invention provides an acid mixing device, which includes a housing and a conveying mechanism;
[0008] The shell has a first end and a second end opposite to each other. The first end of the shell is provided with a first feed port for feeding the calcined fine powder and a second feed port for feeding the acid solution. The second end of the shell is provided with a discharge port for discharging a mixture obtained by mixing the calcined fine powder and the acid solution.
[0009] The conveying mechanism is provided on the shell and is used to convey the mixed material. The conveying mechanism has a stirring structure and extends from the first end of the shell to the second end of the shell.
[0010] The discharge port is provided with a baffle so that the mixed material is first accumulated at the baffle before being discharged.
[0011] In an optional embodiment, the conveying mechanism includes a power source, a conveying shaft, and a stirring structure arranged on the conveying shaft, one end of the conveying shaft is drive-connected to the power source at the first end of the shell, and the other end of the conveying shaft extends to the second end of the shell.
[0012] In an optional embodiment, the conveying shaft includes a first conveying shaft and a second conveying shaft, the first conveying shaft is arranged parallel to the second conveying shaft, one end of the first conveying shaft and one end of the second conveying shaft are both driven and connected to the power source at the first end of the shell, and the other end of the first conveying shaft and the other end of the second conveying shaft extend to the second end of the shell.
[0013] In an optional embodiment, the stirring structure is a stirring blade, and the conveying shaft is provided with stirring blades in both the circumferential direction and the axial direction.
[0014] In an optional embodiment, a plurality of stirring blades evenly spaced apart are provided in the circumferential direction of the conveying shaft; and / or a plurality of stirring blades evenly spaced apart are provided in the axial direction of the conveying shaft.
[0015] In an optional embodiment, the stirring blade is bolted to the conveying shaft.
[0016] In an optional embodiment, the surface of the stirring blade is provided with at least one of a wear-resistant layer and a corrosion-resistant layer.
[0017] In an optional embodiment, the height of the baffle is 50% to 80% of the height of the shell.
[0018] In an optional embodiment, a top cover is installed on the top of one end of the shell, and the power source is arranged in the top cover.
[0019] In a second aspect, the present invention proposes a lithium salt preparation system, which includes a secondary acid mixing device or an acidification reaction feeding device and the acid mixing device in any of the above embodiments; wherein the discharge port of the acid mixing device is connected to the inlet of the secondary acid mixing device or the inlet of the acidification reaction feeding device.
[0020] The beneficial effects of the utility model include:
[0021] The acid mixing equipment provided by the utility model includes a shell and a conveying mechanism. The shell has a first end and a second end opposite to each other. The first end of the shell is provided with a first feed port for the entry of roasted fine powder and a second feed port for the entry of acid solution. The second end of the shell is provided with a discharge port for the discharge of a mixture obtained by mixing the roasted fine powder and the acid solution. The conveying mechanism is arranged in the shell and is used to convey the mixture. The conveying mechanism has a stirring structure and extends from the first end of the shell to the second end of the shell. The discharge port is provided with a baffle so that the mixture is first accumulated at the baffle before being discharged.
[0022] In the above-mentioned acid mixing equipment, the calcined fine powder and the acid liquid enter the shell from the first feed port and the second feed port respectively, and are transported from the first end to the second end through the conveying mechanism. During the conveying process, the stirring structure of the conveying mechanism stirs and mixes the calcined fine powder and the acid liquid, and the mixed material accumulates at the baffle. This process can extend the residence time of the mixture in the shell and the contact time with the stirring structure, thereby making the mixing process more uniform and sufficient; when the accumulation height of the mixture exceeds the discharge baffle, the mixture can pass over the baffle and be discharged from the discharge port.
[0023] The above-mentioned acid mixing equipment has a simple structure and can evenly mix the acid solution and the roasted fine powder. The material after acid mixing does not have agglomeration phenomenon, and the particle size is in a uniform and stable good state. The entire acid mixing equipment operates smoothly and reliably, avoiding the adverse situation of internal corrosion and wall formation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0025] Figure 1 A schematic diagram of the structure of the acid mixing device provided in this embodiment from a first perspective;
[0026] Figure 2 This is a schematic structural diagram of the acid mixing equipment provided in this embodiment from a second perspective.
[0027] Icon: 100-mixed acid equipment; 10-shell; 101-first end; 102-second end; 11-first feed port; 12-discharge port; 20-conveying mechanism; 21-power source; 22-conveying shaft; 23-stirring blade; 30-baffle; 31-notch; 40-top cover. DETAILED DESCRIPTION
[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.
[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," "third," etc., etc., are intended solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] Furthermore, the use of terms such as "horizontal" and "vertical" does not necessarily mean that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical", not that the structure must be completely horizontal, but that it can be slightly tilted.
[0033] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0034] Example 1
[0035] The utility model proposes a mixed acid device 100, please combine Figure 1 and Figure 2 The mixed acid equipment 100 includes a shell 10 and a conveying mechanism 20.
[0036] The shell 10 has a first end 101 and a second end 102 relative to each other. The first end 101 of the shell 10 is provided with a first feed port 11 for the entry of the calcined fine powder and a second feed port for the entry of the acid solution. The second end 102 of the shell 10 is provided with a discharge port 12 for discharging a mixture obtained by mixing the calcined fine powder and the acid solution.
[0037] The conveying mechanism 20 is disposed on the housing 10 and is used to convey the mixed material. The conveying mechanism 20 has a stirring structure and extends from the first end 101 of the housing 10 to the second end 102 of the housing 10.
[0038] The discharge port 12 is provided with a baffle 30 so that the mixed material is first accumulated at the baffle 30 before being discharged.
[0039] In some embodiments, the housing 10 is placed horizontally. In other embodiments, the housing 10 can be tilted, for example, with the discharge port 12 positioned at a relatively high height, so that the mixed material accumulates at a higher height at the baffle 30 before being discharged, thereby further extending the mixing time and improving the uniformity of the material mixing.
[0040] For example, the material of the shell 10 can be low-alloy high-strength structural steel. This type of steel has good corrosion resistance and can adapt to relatively severe corrosive working environments.
[0041] In the above-mentioned acid mixing equipment 100, the calcined fine powder and the acid solution (such as concentrated sulfuric acid) enter the interior of the shell 10 from the first feed port 11 and the second feed port respectively, and are transported from the first end 101 to the second end 102 through the conveying mechanism 20. During the conveying process, the stirring structure of the conveying mechanism 20 stirs and mixes the calcined fine powder and the acid solution, and the mixed material accumulates at the baffle 30. This process can extend the residence time of the mixture in the shell 10 and the contact time with the stirring structure, thereby making the mixing process more uniform and sufficient; when the stacking height of the mixture exceeds the discharge baffle 30, the mixture can pass over the baffle 30 and be discharged from the discharge port 12.
[0042] The above-mentioned acid mixing equipment 100 has a simple structure and can evenly mix the acid solution and the roasted fine powder. The material after acid mixing does not have agglomeration phenomenon, and the particle size is in a uniform and stable good state. In addition, the entire acid mixing equipment 100 operates smoothly and reliably, avoiding the undesirable situation of internal corrosion and wall formation.
[0043] In some embodiments, the conveying mechanism 20 includes a power source 21, a conveying shaft 22, and a stirring structure arranged on the conveying shaft 22. One end of the conveying shaft 22 is driven and connected to the power source 21 at the first end 101 of the shell 10, and the other end of the conveying shaft 22 extends to the second end 102 of the shell 10.
[0044] In some embodiments, the conveying mechanism 20 may be in the form of a spiral conveying, and the conveying speed may be adjusted according to production requirements.
[0045] When the housing 10 is placed horizontally, the conveying shaft 22 is disposed in the housing 10 along the length direction of the housing 10. For example, the power source 21 may be an electric motor. In addition, other power sources such as a hydraulic motor are also not excluded.
[0046] In some embodiments, a top cover 40 is mounted on the first end 101 of the housing 10, and the power source 21 is disposed within the top cover 40 to protect the power source 21 from adverse effects of external factors. It is also understood that by externally placing the power source 21, direct contact between the power source 21 and the mixed material within the housing 10 can be avoided, thereby extending its service life.
[0047] The power source 21 drives the conveying shaft 22 to rotate, and the conveying shaft 22 drives the stirring structure to rotate. With the cooperation of the conveying shaft 22 and the stirring structure, the mixture can be stirred and mixed while moving from the first end 101 to the second end 102 of the shell 10.
[0048] In some embodiments, the number of the conveying shaft 22 may be one, and in other embodiments, the number of the conveying shaft 22 may be two, three, or more.
[0049] In some more typical embodiments, the number of conveying shafts 22 is 2. Specifically, the conveying shafts 22 include a first conveying shaft 22 and a second conveying shaft 22. One end of the first conveying shaft 22 and one end of the second conveying shaft 22 are both driven and connected to the power source 21 at the first end 101 of the shell 10, and the other end of the first conveying shaft 22 and the other end of the second conveying shaft 22 extend to the second end 102 of the shell 10.
[0050] In some embodiments, the number of power sources 21 may be the same as the number of conveying shafts 22, and they may be in a one-to-one correspondence. That is, each power source 21 independently drives its corresponding conveying shaft 22. In other embodiments, the number of power sources 21 may be only one, and the power source 21 may drive all conveying shafts 22 to move synchronously.
[0051] In some embodiments, the first conveying shaft 22 and the second conveying shaft 22 are arranged in parallel; in some other embodiments, the first conveying shaft 22 and the second conveying shaft 22 can also be arranged at an angle, as long as they do not affect each other during the conveying process.
[0052] In some embodiments, the stirring structure is a stirring blade 23 , and the conveying shaft 22 is provided with a stirring blade 23 in both the circumferential direction and the axial direction.
[0053] In some more typical embodiments, the conveying shaft 22 is provided with a plurality of stirring blades 23 evenly spaced in the circumferential direction, or the conveying shaft 22 is provided with a plurality of stirring blades 23 evenly spaced in the circumferential direction, or the conveying shaft 22 is provided with a plurality of stirring blades 23 evenly spaced in the circumferential direction and the axial direction respectively.
[0054] In some optional embodiments, the stirring blade 23 is bolted to the conveying shaft 22 to ensure a stable and reliable connection. In addition, other ways of connecting the stirring blade 23 and the conveying shaft 22 are not excluded, as long as the stirring blade 23 and the conveying shaft 22 can be ensured to be stable.
[0055] In some optional embodiments, the end of the stirring blade 23 may be provided with serrations to enhance the stirring effect.
[0056] In an optional embodiment, at least one of a wear-resistant layer and a corrosion-resistant layer is provided on the surface of the stirring blade 23. The wear-resistant layer can improve the wear resistance of the stirring blade 23, and the corrosion-resistant layer can improve the corrosion resistance of the stirring blade 23. The materials for preparing the wear-resistant layer and the corrosion-resistant layer can refer to the relevant existing technology and will not be described in detail here.
[0057] In this embodiment, the discharge baffle 30 is spaced apart from the second end 102 of the shell 10, and a notch 31 is formed in the discharge baffle 30 to avoid the conveying shaft 22. It can also be understood that the two ends of the conveying shaft 22 are rotatably mounted on the shell 10, and the conveying shaft 22 spans the entire interior of the shell 10. By providing the notch 31 in the discharge baffle 30, the stirring shaft can be avoided, which is beneficial to the stirring operation of the stirring shaft. In some optional embodiments, the height of the baffle 30 can be 50% to 80% of the height of the shell 10, such as 50%, 55%, 60%, 65%, 70%, 75% or 80%, or other values within the range of 50% to 80%. Within this height range, it can be applicable to shells 10 of various specifications and types while ensuring that the mixed material is fully mixed.
[0058] In some optional embodiments, the top of the baffle 30 is flush. In this condition, the mixed material can pass over at the same height. In addition, it is not ruled out that in some embodiments, the top of the baffle 30 is uneven. Alternatively, the top of the baffle 30 is provided with a height-adjustable plate.
[0059] As mentioned above, in this embodiment, the baffle 30 and the discharge port 12 are both provided at the second end 102 of the shell 10. By providing the baffle 30 at the discharge port 12, the mixed material stirred and transported by the conveying mechanism 20 is blocked and accumulated, so that sufficient stirring and mixing is performed at the second end 102 and the position nearby. When the pile height of the mixed material exceeds the height of the baffle 30, the mixed material falls over the baffle 30 and into the discharge port 12. This method can achieve sufficient mixing of the calcined fine powder and the acid solution in the shell 10, prolonging the residence time of the mixed material in the shell 10 and the contact time with the stirring assembly, thereby ensuring a more uniform and sufficient mixing process, reducing the probability of generating agglomerated materials, and effectively avoiding the calcined fine powder material being hastily discharged to the discharge port 12 along with the conveying of the conveying mechanism 20 before being fully mixed in the acid mixer.
[0060] Compared to the prior art, in actual applications, the acid mixing apparatus 100 described above is used to mix calcined fine powder with acid. The resulting mixture exhibits no agglomeration, exhibits a uniform and stable particle size, and operates smoothly and reliably without internal corrosion or wall buildup. Specifically, the acid mixing apparatus 100 provided in this embodiment effectively avoids the prior art problems of material settling at the bottom of the acid mixing machine after entering, limited contact area between the blades and the material, and insufficient residence time of the mixture in the acid mixing machine, resulting in incomplete and uniform mixing of the material with concentrated sulfuric acid, resulting in the formation of clumping material, which in turn affects the effectiveness of subsequent reactions.
[0061] Example 2
[0062] This embodiment provides a lithium salt preparation system, which includes a two-stage mixed acid device or an acidification reaction feeding device and the mixed acid device 100 of Example 1.
[0063] The discharge port 12 of the acid mixing device 100 is connected to the inlet of the secondary acid mixing device or the inlet of the acidification reaction feeding device.
[0064] In some embodiments, the discharge port 12 of the acid mixing device 100 is connected to the inlet of a secondary acid mixing device, so that the mixed material can be further mixed in the secondary acid mixing device.
[0065] In some embodiments, the discharge port 12 of the acid mixing device 100 is connected to the inlet of the acidification reaction feeding device, and the uniformly mixed mixture is heated in the acidification reaction feeding device to cause the roasted fine powder to react chemically with sulfuric acid.
[0066] By subjecting the mixed material obtained in the acid mixing equipment 100 provided in Example 1 to a downstream reaction, the reaction effect can be effectively improved.
[0067] In summary, the acid mixing device 100 provided by the present invention can achieve the following effects during the mixing process:
[0068] (1) The uniformity of the mixed acid remains stable (it can run stably for one month without any failure, and can process a large amount of roasting fine powder every day, and the uniformity of the mixed acid remains stable), providing a high-quality material basis for the subsequent acidification and roasting process, greatly improving production efficiency and product quality;
[0069] (2) Strengthen stirring and enhance the uniformity of mixed acid;
[0070] (3) The mixed acid equipment improves the mixing efficiency of roasted fine powder and sulfuric acid, increases the processing capacity, and the material particles after acid mixing are uniform and free of agglomerates;
[0071] (4) The mixed acid equipment has good corrosion resistance and long service life, and will not cause internal wall formation and affect equipment operation;
[0072] (5) The mixed acid equipment 100 mixes the acid evenly and has a high utilization rate of sulfuric acid.
[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A mixed acid device, characterized in that: including a shell and a conveying mechanism; The shell has a first end and a second end opposite to each other, the first end of the shell is provided with a first feed port for the calcined fine powder to enter and a second feed port for the acid solution to enter, and the second end of the shell is provided with a discharge port for discharging a mixture obtained by mixing the calcined fine powder and the acid solution; The conveying mechanism is provided on the shell and is used to convey the mixed material. The conveying mechanism has a stirring structure and extends from the first end of the shell to the second end of the shell. The discharge port is provided with a baffle so that the mixed material is first accumulated at the baffle and then discharged.
2. The mixed acid equipment according to claim 1, characterized in that The conveying mechanism includes a power source, a conveying shaft, and a stirring structure arranged on the conveying shaft. One end of the conveying shaft is drive-connected to the power source at the first end of the shell, and the other end of the conveying shaft extends to the second end of the shell.
3. The mixed acid equipment according to claim 2, characterized in that The conveying shaft includes a first conveying shaft and a second conveying shaft, the first conveying shaft is arranged parallel to the second conveying shaft, one end of the first conveying shaft and one end of the second conveying shaft are both driven and connected to the power source at the first end of the shell, and the other end of the first conveying shaft and the other end of the second conveying shaft extend to the second end of the shell.
4. The mixed acid equipment according to claim 2 or 3, characterized in that: The stirring structure is a stirring blade, and the conveying shaft is provided with stirring blades in both the circumferential direction and the axial direction.
5. The mixed acid equipment according to claim 4, characterized in that: The conveying shaft is provided with a plurality of stirring blades evenly spaced in the circumferential direction thereof; and / or the conveying shaft is provided with a plurality of stirring blades evenly spaced in the axial direction thereof.
6. The mixed acid equipment according to claim 4, characterized in that The stirring blade is connected to the conveying shaft with bolts.
7. The mixed acid equipment according to claim 4, characterized in that The surface of the stirring blade is provided with at least one of a wear-resistant layer and a corrosion-resistant layer.
8. The mixed acid equipment according to claim 1, characterized in that The height of the baffle is 50% to 80% of the height of the shell.
9. The mixed acid equipment according to claim 2, characterized in that: A top cover is installed on the top of one end of the shell, and the power source is arranged in the top cover.
10. A lithium salt preparation system, characterized in that: It comprises a secondary acid mixing device or an acidification reaction feeding device and the acid mixing device according to any one of claims 1 to 9; wherein the discharge port of the acid mixing device is connected to the inlet of the secondary acid mixing device or the inlet of the acidification reaction feeding device.