Acid mixing system

Abstract

The utility model provides an acid mixing system, and relates to the technical field of chemical engineering, the acid mixing system comprises: a first acid mixer having a first feed inlet, a first acid inlet and a first discharge outlet; mixing the roasted material and concentrated sulfuric acid in a first acid mixing machine to obtain a primary mixed material; a first stirring mechanism is arranged in the first acid mixing machine; the second acid mixer is provided with a second feed port, a second acid inlet and a second discharge port; the second discharge hole is connected with an inlet of the acidification kiln; and a second stirring mechanism is arranged in the second acid mixing machine. Through the arrangement of the first acid mixing machine and the second acid mixing machine, on one hand, two-stage mixing is realized, and a final-stage mixed material with a better mixing effect can be obtained; on the other hand, the concentrated sulfuric acid can be added into the acid mixing system in two times, the adding amount of the concentrated sulfuric acid is more controllable, and the error-tolerant rate is higher.

Description

Technical Field

[0001] This utility model relates to the field of chemical technology, and in particular to a mixed acid system. Background Technology

[0002] Acid mixers and acidification kilns are used for mixing lithium concentrate roasting feed with concentrated sulfuric acid and for acidifying the roasting feed. The acid mixer mixes the concentrated sulfuric acid and roasting feed, which then enters the acidification kiln. The acidification reaction takes place at 250°C, where the useful components in the roasting feed react chemically with the concentrated sulfuric acid to produce soluble lithium sulfate. A key factor controlling the progress of the acidification reaction is the uniformity of the mixture.

[0003] Currently, most acid mixing machines use single-stage acid mixing. The concentrated sulfuric acid and calcined materials are not mixed sufficiently in the acid mixing machine, making it difficult to obtain a uniformly mixed mixture, which affects the reaction effect of the mixture in the acidification kiln. Utility Model Content

[0004] In view of the above, the present invention provides a mixed acid system, which aims to solve at least one of the defects pointed out in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a mixed acid system, comprising:

[0007] The first acid mixer has a first feed inlet, a first acid inlet, and a first discharge outlet. The first feed inlet is used to add calcined material, and the first acid inlet is used to add concentrated sulfuric acid. The calcined material and concentrated sulfuric acid are mixed in the first acid mixer to obtain a primary mixture. The first discharge outlet is used to discharge the primary mixture. The first acid mixer is equipped with a first stirring mechanism, which is used to mix the calcined material and concentrated sulfuric acid to obtain the primary mixture.

[0008] The second acid mixer has a second feed inlet, a second acid inlet, and a second discharge outlet. The second feed inlet is connected to the first discharge outlet. The second acid inlet is used to add concentrated sulfuric acid. The primary mixture and concentrated sulfuric acid are mixed in the second acid mixer to obtain the final mixture. The second discharge outlet is connected to the inlet of the acidification kiln. The second acid mixer is equipped with a second stirring mechanism, which is used to mix the primary mixture and concentrated sulfuric acid to obtain the final mixture.

[0009] In some embodiments of this utility model, the first acid mixer is a horizontal structure, and / or the second acid mixer is a horizontal structure.

[0010] In some embodiments of this utility model, the second stirring mechanism includes a second stirring spiral.

[0011] In some embodiments of this utility model, two second stirring spirals are arranged inside the second acid mixer.

[0012] In some embodiments of this utility model, the first stirring mechanism includes a first stirring spiral.

[0013] In some embodiments of this utility model, the circumferential edge of the first stirring spiral is positioned close to the inner wall of the first acid mixing machine.

[0014] In some embodiments of this utility model, a striking mechanism is provided on the outside of the first acid mixer, and the striking mechanism intermittently strikes the outer wall of the first acid mixer.

[0015] In some embodiments of this utility model, the striking mechanism includes:

[0016] Support plate, installed on top of the first acid mixer;

[0017] The hammer has one end rotatably connected to the support plate, and the other end can intermittently strike the outer wall of the first acid mixer.

[0018] In some embodiments of this utility model, the striking mechanism further includes:

[0019] The support rod is vertically installed at the top of the first acid mixer;

[0020] The lifting rod is horizontally positioned and vertically slidably connected to the support rod;

[0021] The sliding sleeve is slidably connected to the lifting rod, and one end of the striking hammer extends and is rotatably connected to the sliding sleeve.

[0022] In some embodiments of this utility model, the striking mechanism further includes:

[0023] A sector gear is installed at the drive end of the first stirring spiral;

[0024] The toothed plate is connected to the lifting rod at one end, and one side of the toothed plate can mesh with the sector gear with a gap.

[0025] A spring is used to move the lifting rod upwards and reset it.

[0026] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0027] By setting up the first and second acid mixers, on the one hand, two-stage mixing is achieved, resulting in a final mixture with better mixing effect; on the other hand, concentrated sulfuric acid can be added to the acid mixing system in two stages, making the amount of concentrated sulfuric acid added more controllable and the error tolerance higher.

[0028] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the mixed acid system provided in Example 1;

[0031] Figure 2 for Figure 1 The right view;

[0032] Figure 3 This is a schematic diagram of the striking mechanism provided in Example 2;

[0033] Figure 4 for Figure 3 The right view.

[0034] icon:

[0035] 1-First acid mixer, 11-First feed inlet, 12-First acid inlet, 121-First acid adding pipe, 13-First discharge outlet, 14-First stirring screw.

[0036] 2-Second acid mixer, 21-Second feed inlet, 22-Second acid inlet, 221-Second acid adding pipe, 23-Second discharge outlet, 24-Second stirring screw.

[0037] 3-Platform frame, 31-Ladder,

[0038] 4-Strike mechanism, 41-Support plate, 42-Strike hammer, 43-Rotating shaft, 44-Support rod, 45-Lifting rod, 46-Sliding sleeve, 47-Sector gear, 48-Gear plate, 49-Spring. Detailed Implementation

[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "vertical", "horizontal", "up", "down", "top", "bottom", "inner", "outer", "clockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0043] The embodiments of this utility model will be described in detail below.

[0044] Example 1

[0045] See Figures 1-2 This embodiment provides a mixed acid system, including a first mixed acid machine 1 and a second mixed acid machine 2.

[0046] The first acid mixer 1 is a horizontal structure, arranged on a steel platform frame 3. One end of the first acid mixer 1 has a first feed inlet 11 and a first acid inlet 12 at its upper part, and the other end has a first discharge outlet 13 at its lower part. The first feed inlet 11 is used to add calcined material, and the first acid inlet 12 is connected to a first acid addition pipe 121 for adding concentrated sulfuric acid. After the calcined material and concentrated sulfuric acid are mixed in the first acid mixer 1, a primary mixture is obtained. The first discharge outlet 13 is used to discharge the primary mixture. A first stirring mechanism is provided inside the first acid mixer 1, located between the first feed inlet 11 and the first discharge outlet 13. The first stirring mechanism is used to mix the calcined material and concentrated sulfuric acid to obtain the primary mixture and can push the primary mixture from the first feed inlet 11 to the first discharge outlet 13. The first stirring mechanism includes a first stirring spiral 14, the drive end of which is connected to a first drive motor (not shown in the figure); the circumferential edge of the first stirring spiral 14 is located close to the inner wall of the first acid mixer 1.

[0047] The second acid mixer 2 is also a horizontal structure, located below the platform frame 3. One end of the second acid mixer 2 has a second feed inlet 21 and a second acid inlet 22 at its upper part, and the other end has a second discharge outlet 23 at its lower part. The second feed inlet 21 is connected to the first discharge outlet 13 for introducing the primary mixture. The second acid inlet 22 is connected to a second acid addition pipe 221 for adding concentrated sulfuric acid. The primary mixture and concentrated sulfuric acid are mixed in the second acid mixer 2 to obtain the final mixture. The second discharge outlet 23 is connected to the inlet of the acidification kiln and is used to feed the final mixture into the acidification kiln. A second stirring mechanism is installed inside the second acid mixer 2, located between the second feed inlet 21 and the second discharge outlet 23. The second stirring mechanism is used to mix the roasted material and concentrated sulfuric acid to obtain the final mixture and can push the final mixture from the second feed inlet 21 to the second discharge outlet 23. The second stirring mechanism includes two parallel second stirring spirals 24, and the driving end of the second stirring spirals 24 is connected to a second drive motor (not shown in the figure).

[0048] The working principle of the above-mentioned mixed acid system is as follows: the calcined material and concentrated sulfuric acid are initially mixed by the first stirring mechanism in the first mixed acid machine 1 to form a primary mixture. The primary mixture enters the second mixed acid machine 2 and is then mixed with acid again by the second stirring mechanism to obtain the final mixture. The final mixture finally enters the acidification kiln for reaction.

[0049] The first acid mixer 1 is provided with an external striking mechanism 4. The striking mechanism 4 intermittently strikes the outer wall of the first acid mixer 1 to prevent the material from sticking to the inner wall of the first acid mixer 1.

[0050] The second acid mixer 2 also has a sampling and detection port (not shown in the figure), which is used to periodically sample and detect the concentration of free acid in the second acid mixer 2.

[0051] The extension direction of the second stirring spiral 24 is perpendicular to the extension direction of the first stirring spiral 14. That is, the axis of the first acid mixer 1 and the axis of the second acid mixer 2 are perpendicular to each other. In this way, some area can be left empty under the platform frame 3 to facilitate the installation of devices such as ladders 31. Ladders 31 are used for personnel to climb to the vicinity of the first acid mixer 1 located on the platform frame 3.

[0052] Compared with the prior art, this embodiment has at least the following beneficial effects:

[0053] I. In existing technologies, only one acid mixer is used, resulting in limited mixing effect. The first acid mixer 1 and the second acid mixer 2 set up in this embodiment achieve two-stage mixing, which can obtain a final mixture with better mixing effect; on the other hand, concentrated sulfuric acid can be added to the acid mixing system in two stages, making the amount of concentrated sulfuric acid added more controllable and the error tolerance higher.

[0054] Second, existing acid mixers only have one stirring device with a small stirring range. However, the second acid mixer 2 in this embodiment has two parallel second stirring spirals 24, resulting in better mixing. In addition, the circumferential edge of the first stirring spiral 14 in the first acid mixer 1 is located close to the inner wall of the first acid mixer 1, which gives the first stirring spiral 14 a larger stirring range and better mixing effect.

[0055] Third, the first acid mixer 1 is provided with an external striking mechanism 4, which strikes the outer wall of the first acid mixer 1 to prevent the material from sticking to the inner wall of the first acid mixer 1.

[0056] Example 2

[0057] See Figures 1-4 The striking mechanism 4 includes a support plate 41 and a striking hammer 42. The support plate 41 is installed on the top of the first acid mixer 1. One end of the striking hammer 42 is rotatably connected to the support plate 41 via a rotating shaft 43, and the other end can intermittently strike the outer wall of the first acid mixer 1. In this way, the striking method can effectively prevent materials from sticking to the inner wall of the first acid mixer 1.

[0058] Multiple hammers 42 are arranged on both sides of the first acid mixer 1. The multiple hammers 42 located on the same side of the first acid mixer 1 are connected by a rotating shaft 43 to achieve linkage. That is, if one hammer 42 is driven, the multiple hammers 42 located on the same side of the first acid mixer 1 can move synchronously.

[0059] The striking mechanism 4 also includes a support rod 44, a lifting rod 45, and a sliding sleeve 46; the support rod 44 is vertically positioned at the top of the first acid mixer 1; the lifting rod 45 is horizontally positioned and slidably connected to the support rod 44 vertically; the sliding sleeve 46 is slidably connected to the lifting rod 45, and one end of the striking hammer 42 extends and is rotatably connected to the sliding sleeve 46. Thus, by simply moving the lifting rod 45 up and down, the striking hammer 42 can be rotated, causing the striking hammer 42 to intermittently strike the outer wall of the first acid mixer 1.

[0060] The striking mechanism 4 also includes a sector gear 47, a toothed plate 48, and a spring 49; the sector gear 47 is mounted on the drive end of the first stirring spiral 14 (generally a shaft-like component); one end of the toothed plate 48 is connected to the lifting rod 45, and one side of the toothed plate 48 can mesh with the sector gear 47 with a gap; the spring 49 is sleeved on the lower part of the support rod 44, and the spring 49 is used to move the lifting rod 45 upward and reset. During the process of the first stirring spiral 14 being driven by the first drive motor, the sector gear 47 rotates clockwise with the first stirring spiral 14 (…). Figure 3 Rotating clockwise (as shown), the sector gear 47 meshes with the toothed plate 48 and then disengages. When the sector gear 47 meshes with the toothed plate 48, the toothed plate 48 lowers the lifting rod 45, which in turn raises the striking hammer 42. When the sector gear 47 disengages from the toothed plate 48, the lifting rod 45 moves upward under the restoring force of the spring 49, causing the striking hammer 42 to strike the outer wall of the first acid mixing machine 1. With the configuration of the sector gear 47, toothed plate 48, and spring 49, there is no need for an additional power source for the striking hammer 42.

[0061] The second acid mixing machine 2 may also be equipped with the aforementioned striking mechanism 4 on its exterior.

[0062] Example 3

[0063] See Figures 1-4 Unlike Embodiment 1 or 2, in this embodiment, the first acid mixer 1 and / or the second acid mixer 2 are vertical structures. Taking the first acid mixer 1 as an example, the first feed port 11 is arranged at the top of the first acid mixer 1 and the first discharge port 13 is arranged at the bottom of the first acid mixer 1. At this time, the first stirring mechanism only needs to have the stirring function and does not need to have the function of pushing materials.

[0064] Example 4

[0065] See Figures 1-4 Unlike Embodiment 1 or 2, in this embodiment, there is one second stirring spiral 24, or there are three or more second stirring spirals 24.

[0066] Example 5

[0067] See Figures 1-4Unlike Embodiment 1 or 2, there are multiple second acid mixing machines 2 connected in series between the first acid mixing machine 1 and the acidification kiln.

[0068] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mixed acid system, characterized in that, include: The first acid mixing machine has a first feed inlet, a first acid inlet, and a first discharge outlet; The first feed inlet is used to add the calcining material, and the first acid inlet is used to add concentrated sulfuric acid. The calcining material and concentrated sulfuric acid are mixed in the first acid mixer to obtain a primary mixture. The first discharge outlet is used to discharge the primary mixture. The first acid mixer is equipped with a first stirring mechanism, which is used to mix the calcining material and concentrated sulfuric acid to obtain the primary mixture. The second acid mixer has a second feed inlet, a second acid inlet, and a second discharge outlet. The second feed inlet is connected to the first discharge outlet. The second acid inlet is used to add concentrated sulfuric acid. The primary mixture and concentrated sulfuric acid are mixed in the second acid mixer to obtain the final mixture. The second discharge outlet is connected to the inlet of the acidification kiln. The second acid mixer is equipped with a second stirring mechanism, which is used to mix the primary mixture and concentrated sulfuric acid to obtain the final mixture.

2. The mixed acid system according to claim 1, characterized in that, The first acid mixer is a horizontal structure, and / or the second acid mixer is a horizontal structure.

3. The mixed acid system according to claim 2, characterized in that, The second stirring mechanism includes a second stirring spiral.

4. The mixed acid system according to claim 3, characterized in that, Two second stirring spirals are installed inside the second acid mixer.

5. The mixed acid system according to claim 2, characterized in that, The first stirring mechanism includes a first stirring spiral.

6. The mixed acid system according to claim 5, characterized in that, The circumferential edge of the first stirring spiral is positioned close to the inner wall of the first acid mixer.

7. The mixed acid system according to claim 5 or 6, characterized in that, The first acid mixer is equipped with a striking mechanism on its exterior, which intermittently strikes the outer wall of the first acid mixer.

8. The mixed acid system according to claim 7, characterized in that, The striking mechanism includes: A support plate is installed on top of the first acid mixer; The hammer has one end rotatably connected to the support plate, and the other end can intermittently strike the outer wall of the first acid mixer.

9. The mixed acid system according to claim 8, characterized in that, The striking mechanism also includes: The support rod is vertically installed at the top of the first acid mixing machine; The lifting rod is horizontally arranged and vertically slidably connected to the support rod; The sliding sleeve is slidably connected to the lifting rod, and one end of the striking hammer extends and is rotatably connected to the sliding sleeve.

10. The mixed acid system according to claim 9, characterized in that, The striking mechanism also includes: A sector gear is installed at the drive end of the first stirring spiral; The toothed plate is connected to the lifting rod at one end, and one side of the toothed plate can mesh with the sector gear with a clearance. A spring is used to move the lifting rod upwards and reset it.

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