Sulfuric acid method lithium extraction drying equipment

Abstract

The invention relates to the technical field of lithium extraction, in particular to sulfuric acid method lithium extraction drying equipment which comprises a rotary drying machine, the rotary drying machine comprises a rotary drying cylinder rotating continuously, a plurality of shoveling plates are fixedly installed in the rotary drying cylinder, and a dispersing unit is installed on the left side in the rotary drying cylinder; a screening and drying unit is mounted on the right side in the rotary drying cylinder; the drying device is used for drying raw materials obtained after lepidolite and concentrated sulfuric acid are mixed, thick or pasty raw materials can be dispersed, the thick or pasty raw materials are prevented from being accumulated into large agglomerates, it is ensured that the raw materials make full and uniform contact with hot air, then the drying effect on the raw materials is ensured, the quality of dried products is ensured, and the drying efficiency is improved. And meanwhile, granular raw materials can be screened and dried, it is ensured that the granular raw materials make full contact with hot air, and then it is ensured that the raw materials are thoroughly dried.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium extraction, and particularly relates to a drying device for lithium extraction by the sulfuric acid method. Background Art

[0002] The sulfuric acid method for lithium extraction is an important lithium extraction technology for lithium-containing silicate minerals such as lepidolite. After the crushed lepidolite and concentrated sulfuric acid are mixed, they go through processes such as roasting, leaching, purification, and lithium precipitation to achieve the efficient extraction of lithium elements. Before roasting the mixture of lepidolite and sulfuric acid, it is usually necessary to dry the raw materials. When drying the raw materials after mixing lepidolite and concentrated sulfuric acid, the initially thick raw materials first turn into a paste-like state and finally into a granular state, thereby removing free water, promoting the full contact between sulfuric acid and minerals, and being beneficial to the subsequent processing of the raw materials.

[0003] Currently, when drying the raw materials after mixing lepidolite and concentrated sulfuric acid, a rotary dryer is usually used for drying. The raw materials are continuously fed into the rotating cylinder of the rotary dryer, and the rotary dryer is controlled to rotate continuously. The hot air unit heats the air in the rotating cylinder, so that the hot air dries the raw materials. And a lifter for lifting and conveying the raw materials is installed in the rotating cylinder, so that the raw materials are fully in contact with the hot air to achieve the drying of the raw materials.

[0004] The following problems exist in the current drying of the raw materials after mixing lepidolite and concentrated sulfuric acid: Since the raw materials after mixing lepidolite and concentrated sulfuric acid are relatively thick and in a paste-like state in the middle stage of drying, there may be a problem that the raw materials accumulate into large lumps during the drying process, resulting in the raw materials not being able to be fully and evenly in contact with the hot air, thereby affecting the drying effect of the raw materials and reducing the quality of the dried products; at the same time, when the granular raw materials are lifted and dropped by the lifter, there may be a large amount of granular raw materials piled up together, resulting in the inability to be fully in contact with the hot air, and thus there may be a situation where some granular raw materials cannot be completely dried. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a sulfuric acid method lithium extraction drying equipment, including a rotary dryer, the rotary dryer includes a continuously rotating rotary drying cylinder, a plurality of copying plates are fixedly installed in the rotary drying cylinder, a dispersion unit is installed on the left side of the rotary drying cylinder, and a screening drying unit is installed on the right side of the rotary drying cylinder; the dispersion unit includes a plurality of material-diverting plates fixedly installed in the rotary drying cylinder, and baffle plates are fixedly installed on both ends of the material-diverting plate, the baffle plates are fixed between the rotary drying cylinder, and the ends of the two baffle plates on the opposite sides and close to the middle of the rotary drying cylinder are connected by a rotating member A dispersion plate is installed at the same time, and a plurality of dispersion holes of a conical structure are opened on the dispersion plate. The material baffle plate is used to cooperate with the material stripping plate to strip the raw materials, and the raw materials can only be moved out of the material stripping plate from the dispersion holes of the dispersion plate. A stripping group for stripping the raw materials is installed on the material stripping plate; the screening and drying unit includes a plurality of lifting plates fixedly installed in the rotary drying cylinder, a material stripping plate with a comb-shaped structure is fixedly installed on one end of the lifting plate and the rotary drying cylinder on the side with the same rotation direction and close to the middle of the rotary drying cylinder, and a screening group for screening and drying granular raw materials is installed on the lifting plate; the material stripping plates and the lifting plates are evenly arranged circumferentially with their corresponding copying plates.

[0006] Preferably, the rotating member includes a rotating shaft rotatably mounted on the two baffle plates, and a torsion spring is connected between the rotating shaft and the two baffle plates, the surface of the rotating shaft is arranged in contact with a side of the material-diverting plate close to the middle of the rotary drying cylinder, the rotating shaft and the dispersion plate are fixedly connected, the dispersion plate is located on the side with the same rotation direction as the material-diverting plate and the rotary drying cylinder, and the dispersion plate is initially arranged perpendicular to the material-diverting plate.

[0007] Preferably, a feed plate is rotatably installed on the left side of the rotary drying cylinder, a feed port is provided on the feed plate, and the feed plate is fixedly connected to the fixed end of the rotary dryer, an arc-shaped plate is fixedly installed on the upper front part of the right end of the feed plate, and an arc-shaped plate is also distributed inside the rotary drying cylinder and to the right of the rightmost feed plate, and a plurality of arc-shaped evenly arranged toggle blocks are fixedly installed on one end of the opposite sides of the left and right arc-shaped plates close to the middle of the rotary drying cylinder, and a matching plate with an arc-shaped structure is fixedly installed on one end of the arc-shaped plate away from the middle of the rotary drying cylinder.

[0008] Preferably, the spreading group includes a sliding plate radially slidably mounted on the material stripping plate, and the sliding plate is located at one end of the material stripping plate close to the middle of the rotary drying cylinder, the sliding plate is connected to the material stripping plate through a plurality of return springs evenly arranged on the left and right, a sealing plate is fixedly mounted on the sliding plate, and the sealing plate is in contact with the rotary drying cylinder, and a spreading plate is fixedly mounted on the middle of one side of the sealing plate away from the sliding plate.

[0009] Preferably, toggle rods are fixedly installed at both the left end of the leftmost sliding plate and the right end of the rightmost sliding plate. The toggle rods sequentially slide radially through the corresponding material pushing plates and material blocking plates. One end of the toggle block close to the middle of the rotary drying cylinder is provided with an inclined surface that cooperates with the toggle rod. A square synchronous rod is fixedly installed between two adjacent sliding plates on the left and right, and the square synchronous rod slides through the corresponding material pushing plate and material blocking plate.

[0010] Preferably, the side of the material pushing plate away from the middle of the rotary drying cylinder is provided with a hollow structure. A positioning plate is radially slidably installed in the hollow structure of the material pushing plate through a plurality of top extension springs arranged evenly from left to right. A plurality of positioning holes are arranged evenly from front to back on the positioning plate, and a plurality of staggered holes staggered with the positioning holes are formed on the material pushing plate.

[0011] Preferably, a cooperation rod is fixedly installed at the middle of the left end of the leftmost positioning plate and the middle of the right end of the rightmost positioning plate. The cooperation rod sequentially slides through the corresponding material pushing plate and material blocking plate. The lower end of the cooperation plate is provided with an inclined surface that cooperates with the cooperation rod. A synchronous plate is fixedly installed between two adjacent positioning plates on the left and right, and the synchronous plate slides through the corresponding material pushing plate and material blocking plate.

[0012] Preferably, a uniform distribution plate is fixedly installed on the opposite sides of the two material blocking plates, and the uniform distribution plate is located on the side where the material pushing plate and the rotary drying cylinder rotate in the same direction. A plurality of rectangular holes are arranged evenly in the radial direction on the uniform distribution plate. A plurality of uniform flow plate groups are fixedly installed on the side of the material pushing plate facing the uniform distribution plate. Each uniform flow plate group includes a plurality of uniform flow plates arranged evenly from left to right.

[0013] Preferably, two baffles arranged symmetrically from left to right are fixedly installed among the lifting plate, the material distributing plate and the rotary drying cylinder. A plurality of triangular plates are fixedly installed on the side of the material distributing plate away from the middle of the rotary drying cylinder, and the triangular plates correspond one by one to the comb tooth structures of the material distributing plate.

[0014] Preferably, the sieve group includes a screening plate fixedly installed on the side of the lifting plate close to the middle of the rotary drying cylinder. A plurality of diversion grooves are arranged evenly from left to right on the side of the screening plate where the rotary drying cylinder rotates in the same direction, and the positions of the diversion grooves correspond one by one to the comb tooth holes of the material distributing plate. A plurality of screening holes are arranged evenly along the length direction of the diversion grooves in the diversion grooves, and the aperture of the screening holes closer to the middle of the rotary drying cylinder is larger.

[0015] The beneficial effects of the present invention are: 1. The present invention sets a dispersion unit so that thick or pasty raw materials will not contact with hot air in the form of accumulation into large agglomerates, so that the thick or pasty raw materials and hot air are fully and evenly contacted, thereby ensuring the drying effect of the thick or pasty raw materials and the quality of the products after drying. At the same time, the present invention sets a screening and drying unit to screen and dry the granular raw materials, so that the granular raw materials with small particle size can be removed from the screening and drying unit first and fall into the rotary drying drum, thereby preventing the granular raw materials from piling up, making the granular raw materials fully contact with the hot air, and ensuring that the granular raw materials are thoroughly dried.

[0016] 2. The present invention provides a spreading group to periodically and quickly spread the thick or pasty raw materials toward one end away from the middle of the drying cylinder, so that the thick and pasty raw materials collide with the flow equalizing plate under the rapid spreading action of the spreading group, so that the lumps in the thick or pasty raw materials can be broken under the impact, further ensuring the drying effect of the thick or pasty raw materials, thereby further ensuring the quality of the dried products.

[0017] 3. When the spreading group quickly moves the thick or pasty raw materials, the present invention aligns the alignment holes of the alignment plate and the offset holes of the material-moving plate, so that the moved thick and pasty raw materials can be moved out of the alignment plate. At the same time, the present invention arranges a plurality of flow-equalizing plates so that the moved thick and pasty raw materials can be separated to the left and right, thereby allowing the thick and pasty raw materials to be quickly moved out of the material-moving plate in the form of smaller aggregates, thereby achieving rapid drying of the thick or pasty raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a schematic diagram of the cutaway three-dimensional structure of the rotary drying drum of the present invention.

[0021] Figure 3 It is a right view of the feed plate, the arc plate, the toggle block and the matching plate located on the left side of the present invention.

[0022] Figure 4 It is a schematic diagram of the cutaway three-dimensional structure of the dispersion unit of the present invention.

[0023] Figure 5 It is a cross-sectional view from a first viewing angle of a partial structure of a dispersed unit of the present invention.

[0024] Figure 6 It is a cross-sectional view from a second perspective of the dispersed unit partial structure of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of a partial structure of a screening and drying unit of the present invention.

[0026] Figure 8 It is the first right view after partial structure of the present invention is cut away.

[0027] Figure 9 The present invention Figure 8 Status diagram of the work.

[0028] Figure 10 It is a second right view after partial structure of the present invention is cut away.

[0029] Figure 11 The present invention Figure 10 Status diagram of the work.

[0030] Figure 12 It is a left view of the feed plate, the arc plate, the toggle block, the matching plate and the rotary drying cylinder located on the right side of the present invention.

[0031] Reference numerals: 1, rotary dryer; 11, rotary drying drum; 111, feed plate; 112, arc plate; 113, toggle block; 114, matching plate; 12, copying plate; 2, dispersion unit; 21, toggle plate; 211, top extension spring; 212, alignment plate; 213, alignment hole; 214, matching rod; 215, synchronization plate; 216, flow balancing plate group; 22, baffle plate; 221, balancing Distributor plate; 23. Rotating member; 24. Dispersing plate; 25. Dispersing group; 251. Sliding plate; 252. Reset spring; 253. Sealing plate; 254. Dispersing plate; 255. Toggle rod; 256. Square synchronization rod; 3. Screening and drying unit; 31. Lifting plate; 311. Baffle; 32. Distributing plate; 321. Triangular plate; 33. Screening group; 331. Screening plate; 332. Screening hole. DETAILED DESCRIPTION

[0032] The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product instructions shall be followed.

[0033] See also Figure 1 and Figure 2 A drying device for extracting lithium by sulfuric acid method includes a rotary dryer 1, which includes a continuously rotating rotary drying cylinder 11, a plurality of lifting plates 12 are fixedly installed in the rotary drying cylinder 11, and the lifting plates 12 are arranged as an inclined structure to drive the raw materials to move to the right. A dispersion unit 2 is installed on the left side inside the rotary drying cylinder 11, and a screening and drying unit 3 is installed on the right side inside the rotary drying cylinder 11.

[0034] See alsoFigure 1 and Figure 2 , a feed plate 111 is rotatably installed on the left side of the rotary drying cylinder 11. A feed inlet is formed in the feed plate 111, and the feed plate 111 is fixedly connected to the fixed end of the rotary dryer 1.

[0035] It should be noted that the rotary dryer 1 in the present invention further includes a hot air unit, a driving unit, and a feeding unit. The hot air unit is installed outside the rotary drying cylinder 11. The left side of the rotary drying cylinder 11 is connected to the driving unit, and the left side of the feed plate 111 is connected to the feeding unit. Moreover, the feed plate 111 is always in a static state. By putting the raw materials into the feeding unit, the raw materials enter the rotary drying cylinder 11 through the feed inlet of the feed plate 111. The right end of the rotary drying cylinder 11 is connected to an external discharging unit, and the dried raw material particles are discharged from the rotary drying cylinder 11 through the discharging unit.

[0036] The present invention is used for drying the raw materials after mixing lepidolite and concentrated sulfuric acid. Moreover, the present invention can disperse thick or paste-like raw materials, prevent the thick or paste-like raw materials from accumulating into large agglomerates, ensure that the raw materials are in full and uniform contact with the hot air, thereby ensuring the drying effect of the raw materials and the quality of the dried products. At the same time, the present invention can also screen and dry granular raw materials, ensure that the granular raw materials are in full contact with the hot air, and thereby ensure the thorough drying of the raw materials.

[0037] Specifically, first, the raw materials are put into the feeding unit. The feeding unit feeds the raw materials into the rotary drying cylinder 11 through the feed inlet of the feed plate 111. The hot air unit is started to heat the air in the rotary drying cylinder 11. At the same time, the driving unit is started to drive the rotary drying cylinder 11 to rotate continuously, so that the rotary drying cylinder 11 drives the stirring plate 12 to rotate. The stirring plate 12 picks up the raw materials and drives the raw materials to move to the right. When the raw materials just enter the rotary drying cylinder 11, the raw materials are in a thick state. The thick raw materials move to the right under the action of the stirring plate 12 and are gradually dried under the action of the hot air. As the thick raw materials are gradually dried, the thick raw materials first gradually turn into a paste state and finally turn into a granular state.

[0038] When the raw material is in a thick or paste state, the raw material is located at the corresponding position of the dispersion unit 2 at this time. The continuously rotating rotary drying cylinder 11 drives the dispersion unit 2 to lift the thick or paste raw material to a certain height, and then the thick or paste raw material moves out of the dispersion unit 2 and falls into the rotary drying cylinder 11 under the action of gravity. Moreover, the dispersion unit 2 can disperse the thick or paste raw material to prevent it from accumulating into large lumps, so that the thick or paste raw material can be fully and evenly contacted with hot air during the falling process. When the raw material is in a granular state, the raw material is located at the corresponding position of the screening and drying unit 3 at this time. The continuously rotating rotary drying cylinder 11 drives the screening and drying unit 3 to lift the granular raw material to a certain height, and then the granular raw material moves out of the screening and drying unit 3 and falls into the rotary drying cylinder 11 under the action of gravity. And granular raw materials with different particle sizes can fall from the screening and drying unit 3 successively, thereby preventing the granular raw material from piling up and enabling the granular raw material to be fully dried.

[0039] Refer to Figure 2 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9 The dispersion unit 2 includes a plurality of baffle plates 21 fixedly installed in the rotary drying cylinder 11. Baffle plates 22 are fixedly installed at both the left and right ends of the baffle plate 21. The baffle plates 22 are fixed to the rotary drying cylinder. At one end of the opposite sides of the two baffle plates 22 and close to the middle of the rotary drying cylinder 11, a dispersion plate 24 is jointly installed through a rotating member 23. A plurality of dispersion holes with a conical structure are formed on the dispersion plate 24. The baffle plates 22 are used to cooperate with the baffle plate 21 to lift the raw material and make the raw material can only move out of the area of the baffle plate 21 and the baffle plates 22 through the dispersion holes of the dispersion plate 24. A dispersion group 25 for dispersing the raw material is installed on the baffle plate 21; the baffle plate 21 and its corresponding scraper 12 are circumferentially arranged evenly.

[0040] Refer to Figure 5 The rotating member 23 includes a rotating shaft rotatably installed on the two baffle plates 22, and torsion springs are connected between the rotating shaft and the two baffle plates 22. The surface of the rotating shaft is in contact with the side of the baffle plate 21 close to the middle of the rotary drying cylinder 11. The rotating shaft is fixedly connected to the dispersion plate 24, and the dispersion plate 24 is initially arranged perpendicular to the baffle plate 21.

[0041] Refer to Figure 2 、 Figure 4 、 Figure 5 、 Figure 8 and Figure 9, a uniform distribution plate 221 is fixedly installed on the opposite sides of the two material baffle plates 22, and the uniform distribution plate 221 is located on the side where the material feeding plate 21 and the rotating drying cylinder 11 rotate in the same direction. A plurality of rectangular holes are radially and uniformly arranged on the uniform distribution plate 221. A plurality of uniform flow plate groups 216 are radially and uniformly arranged on the side of the material feeding plate 21 facing the uniform distribution plate 221. Each uniform flow plate group 216 includes a plurality of uniform flow plates arranged left and right evenly.

[0042] The dispersion unit 2 is used to prevent thick or paste-like raw materials from accumulating into large lumps; specifically, when the rotating drying cylinder 11 rotates, the rotating drying cylinder 11 drives the material feeding plate 21 to rotate. When the material feeding plate 21 rotates to the lowest position, the uniform distribution plate 221 first contacts the thick or paste-like raw materials. As the uniform distribution plate 221 rotates, the thick or paste-like raw materials can pass through the rectangular holes and contact the material feeding plate 21. And under the action of the rectangular holes, the thick or paste-like raw materials can be preliminarily dispersed, so that when the material feeding plate 21 picks up the thick or paste-like raw materials, the thick or paste-like raw materials are evenly distributed on the material feeding plate 21. Under the action of the two material baffle plates 22, the raw materials are always located on the material feeding plate 21.

[0043] When the material feeding plate 21 rotates to a state where one end close to the middle of the rotating drying cylinder 11 is inclined downward, the thick or paste-like raw materials move along the surface of the material feeding plate 21 towards the direction close to the dispersion plate 24 under the action of gravity and move out of the material feeding plate 21 from the dispersion holes of the dispersion plate 24. Under the action of the dispersion holes of the dispersion plate 24, the thick or paste-like raw materials will not fall into the rotating drying cylinder 11 in the form of accumulating into large lumps, so that the thick or paste-like raw materials can be fully and evenly contacted with hot air during the falling process, thereby ensuring the drying effect of the thick or paste-like raw materials and ensuring the quality of the dried product. And the dispersion holes of the dispersion plate 24 are arranged in a conical structure to prevent the thick or paste-like raw materials from being blocked in the dispersion holes of the dispersion plate 24.

[0044] When a large amount of thick or paste-like raw materials are piled up on the dispersion plate 24, the thick or paste-like raw materials push the dispersion plate 24 to rotate with the center line of the rotating shaft as the reference under the action of gravity. The included angle between the dispersion plate 24 and the material feeding plate 21 changes from a right angle to an obtuse angle, so that the upper dispersion holes move to the corresponding positions of the thick or paste-like raw materials as the material feeding plate 21 rotates. The thick or paste-like raw materials can move out of the dispersion plate 24 from more dispersion holes. Thus, before the material feeding plate 21 rotates to the highest position, the thick or paste-like raw materials can move out of the material feeding plate 21 from the dispersion holes of the dispersion plate 24. When the thick or paste-like raw materials completely move out of the material feeding plate 21, the rotating shaft drives the dispersion plate 24 to reset under the action of the torsion spring.

[0045] At the same time, the spreading group 25 can periodically and quickly spread the thick or pasty raw materials toward one end away from the middle of the rotary drying drum 11, so that the thick and pasty raw materials collide with the flow equalizing plate under the rapid spreading action of the spreading group 25. Furthermore, when there is agglomeration in the thick or pasty raw materials, the agglomerated thick or pasty raw materials can be broken under the impact, further ensuring the drying effect of the thick or pasty raw materials, thereby further ensuring the quality of the dried products.

[0046] See also Figure 4 , Figure 5 and Figure 6 The spreading group 25 includes a sliding plate 251 radially slidably mounted on the material stripping plate 21, and the sliding plate 251 is located at one end of the material stripping plate 21 close to the middle of the rotary drying cylinder 11, the sliding plate 251 is connected to the material stripping plate 21 through a plurality of return springs 252 evenly arranged left and right, a sealing plate 253 is fixedly mounted on the sliding plate 251, and the sealing plate 253 is in contact with the rotary drying cylinder 11, a spreading plate 254 is fixedly mounted on the middle of one side of the sealing plate 253 away from the sliding plate 251, and the sealing plate 253 is used to seal the sliding connection between the sliding plate 251 and the material stripping plate 21.

[0047] See also Figure 2 and Figure 3 An arc plate 112 is fixedly installed on the upper front part of the right end of the feed plate 111, and a plurality of evenly arranged arc-shaped toggling blocks 113 are fixedly installed on one end of the right side of the left arc plate 112 close to the middle of the rotary drying cylinder 11.

[0048] See also Figure 3 , Figure 4 and Figure 6 A toggle rod 255 is fixedly installed on the left end of the sliding plate 251 located on the far left, and the left end of the toggle rod 255 located on the left slides through the leftmost material diverting plate 21 and the material baffle plate 22 in sequence. The end of the toggle block 113 located on the left close to the middle of the rotary drying cylinder 11 is set as an inclined surface matching the corresponding toggle rod 255. A square synchronization rod 256 is fixedly installed between the two adjacent sliding plates 251 on the left and right, and the square synchronization rod 256 slides through the corresponding material diverting plate 21 and the material baffle plate 22.

[0049] It should be noted that a sealing block 1 is fixedly sleeved on the outside of the toggle rod 255 and the square synchronization rod 256, and the sealing block 1 is radially slidably connected to the corresponding baffle plate 22. The sealing block 1 is used to seal the sliding connection between the toggle rod 255 and the baffle plate 22 and the sliding connection between the square synchronization rod 256 and the baffle plate 22.

[0050] It should be noted that, see Figure 2 and Figure 12, an arc-shaped plate 112 is also distributed in the rotary drying cylinder 11 and on the right side of the rightmost material stripping plate 21, and the distribution position of the right arc-shaped plate 112 corresponds to the installation position of the left arc-shaped plate 112, a round rod is fixedly installed in the feed port of the feed plate 111 through a plurality of circumferentially evenly arranged fixing rods, a fixing plate is fixedly installed between the round rod and the right arc-shaped plate 112, and a plurality of arc-shaped evenly arranged toggle blocks 113 are also fixedly installed at one end of the left side of the right arc-shaped plate 112 near the middle of the rotary drying cylinder 11, a toggle rod 255 is also fixedly installed at the right end of the sliding plate 251 located on the far right, and the right end of the toggle rod 255 located on the right slides through the rightmost material stripping plate 21 and the baffle plate 22 in sequence, and the end of the toggle block 113 located on the right near the middle of the rotary drying cylinder 11 is also set to an inclined surface matching the corresponding toggle rod 255.

[0051] The dispersing group 25 is used to quickly disperse thick or pasty raw materials toward the inner wall of the rotary drying drum 11; specifically, when the dispersing plate 21 rotates to a state where one end close to the middle of the rotary drying drum 11 is tilted downward and continues to rotate, the dispersing plates 21 on the left and right sides drive the toggle rod 255 to rotate to the corresponding position of the toggle block 113 through the sliding plate 251. When the toggle rod 255 and the inclined surface of the toggle block 113 contact and continue to rotate, the toggle rod 255 and the inclined surface of the toggle block 113 cooperate to drive the corresponding sliding plate 251 to move and compress the corresponding return spring 252. When the toggle rod 255 and the toggle block 113 are separated, the position The sliding plates 251 on the left and right sides quickly return to their initial positions under the action of the corresponding multiple return springs 252, thereby driving the sliding plates 251 to move back and forth radially, so that the sliding plates 251 drive the scattering plates 254 to quickly move the raw materials toward the inner wall of the rotary drying drum 11, and then the thick and pasty raw materials hit the flow equalizing plate under the rapid moving action of the scattering plates 254. Moreover, since multiple return springs 252 are connected between the sliding plates 251 and the material shifting plates 21, the scattering plates 254 can move the thick and pasty raw materials with a larger elastic force, thereby achieving the impact and crushing of the agglomerated thick or pasty raw materials.

[0052] There are multiple moving blocks 113 , and under the action of the square synchronization rod 256 , all the spreading plates 254 can quickly move the raw materials toward the inner wall of the rotary drying cylinder 11 synchronously.

[0053] See also Figure 4 , Figure 5 and Figure 6 The side of the material-shifting plate 21 away from the middle of the rotary drying drum 11 is set as a hollow structure, and a positioning plate 212 is radially slidably installed in the hollow structure of the material-shifting plate 21 through a plurality of top extension springs 211 evenly arranged left and right, and a plurality of positioning holes 213 evenly arranged front and back are set on the positioning plate 212, and a plurality of staggered holes staggered with the positioning holes 213 are opened on the material-shifting plate 21.

[0054] Refer to Figure 2 、 Figure 3 and Figure 6 , at one end of the right side of the left arc-shaped plate 112 far from the middle of the rotary drying cylinder 11, a matching plate 114 with an arc structure is fixedly installed; at the middle of the left end of the leftmost alignment plate 212, a matching rod 214 is fixedly installed, and the left end of the left matching rod 214 sequentially slides through the leftmost material pushing plate 21 and the material blocking plate 22. The lower end of the left matching plate 114 is provided with an inclined surface matching the corresponding matching rod 214. A synchronous plate 215 is fixedly installed between two adjacent left-right arranged alignment plates 212, and the synchronous plate 215 slides through the corresponding material pushing plate 21 and the material blocking plate 22.

[0055] It should be noted that sealing blocks two are fixedly sleeved on the outer sides of the matching rod 214 and the synchronous plate 215, and the sealing blocks two are in radial sliding connection with the corresponding material blocking plate 22. The sealing blocks two are used to seal the sliding connection between the matching rod 214 and the material blocking plate 22 and the sliding connection between the synchronous plate 215 and the material blocking plate 22.

[0056] It should be noted that refer to Figure 2 and Figure 12 , at one end of the left side of the right arc-shaped plate 112 far from the middle of the rotary drying cylinder 11, a matching plate 114 with an arc structure is also fixedly installed; at the middle of the right end of the rightmost alignment plate 212, a matching rod 214 is also fixedly installed, and the right end of the right matching rod 214 sequentially slides through the rightmost material pushing plate 21 and the material blocking plate 22. The lower end of the right matching plate 114 is provided with an inclined surface matching the corresponding matching rod 214.

[0057] Initially, the alignment holes 213 of the alignment plate 212 and the misaligned holes of the material pushing plate 21 are arranged in an alternating manner, so that the material pushing plate 21 can lift the thick and paste-like raw materials. When the material pushing plate 21 rotates to a state where the end close to the middle of the rotary drying cylinder 11 is inclined downward and continues to rotate, the left and right material pushing plates 21 drive the corresponding matching rods 214 to rotate to the corresponding position of the inclined surface of the matching plate 114 through the alignment plate 212 and continue to rotate, so that the matching rod 214 moves in the direction close to the middle of the rotary drying cylinder 11 under the action of the inclined surface of the matching plate 114. Then the matching rod 214 moves along the inner arc surface of the matching plate 114, so that the matching rod 214 drives the alignment plate 212 to move in the direction close to the middle of the rotary drying cylinder 11 and stretch the corresponding plurality of top extension springs 211. At this time, the alignment holes 213 of the alignment plate 212 and the misaligned holes of the material pushing plate 21 are communicated to form a blanking channel.

[0058] When one end of the feeding plate 21 near the middle of the rotary drying cylinder 11 inclines downward, the thick paste-like and paste-like raw materials move downward along the surface of the feeding plate 21 and accumulate on the dispersion plate 24, so that a small amount of thick paste-like and paste-like raw materials are located at the position corresponding to the alignment plate 212. At this time, only a small part of the thick paste-like and paste-like raw materials move out of the feeding plate 21 from the blanking channel, and at this time, the thick paste-like and paste-like raw materials will not move out of the blanking channel in the form of large agglomerates. At the same time, when the dispersing plate 254 continuously and quickly moves close to the uniform flow plate group 216 to stir the corresponding raw materials, at this time, the thick paste-like and paste-like raw materials can be stirred to the position corresponding to the alignment plate 212, assisting the raw materials to move out of the alignment plate 212 from the blanking channel. Under the action of multiple uniform flow plates, the stirred thick paste-like and paste-like raw materials can be spaced apart left and right, further ensuring that the thick paste-like and paste-like raw materials will not move out of the blanking channel in the form of large agglomerates, and at the same time ensuring that the thick paste-like and paste-like raw materials can quickly move out of the feeding plate 21.

[0059] At the same time, under the action of the synchronous plate 215, the multiple alignment plates 212 arranged left and right can move synchronously in the direction close to the middle of the rotary drying cylinder 11. And when the matching rod 214 and the matching plate 114 are separated, at this time, the alignment plate 212 returns to the initial position under the action of the top extension spring 211, so that the alignment holes 213 of the alignment plate 212 and the misalignment holes of the feeding plate 21 are arranged in a staggered manner again.

[0060] Refer to Figure 1 、 Figure 2 and Figure 7 and

[0061] Refer to Figure 2 、 Figure 7 、 Figure 10 and Figure 11 and

[0062] The screening and drying unit 3 is used for screening and drying granular raw materials. Specifically, when the rotary drying cylinder 11 rotates, the rotary drying cylinder 11 drives the lifting plate 31 to rotate. When the lifting plate 31 rotates to the lowest position, the lifting plate 31 picks up the granular raw materials, and under the action of the two baffles 311, the granular raw materials always remain on the lifting plate 31. When the lifting plate 31 rotates to a state where one end near the middle of the rotary drying cylinder 11 is inclined downward, the granular raw materials move along the surface of the lifting plate 31 towards the direction close to the material distribution plate 32 under the action of gravity. Under the action of the triangular plate 321, the granular raw materials pass through the comb-shaped holes of the material distribution plate 32 and move into the screening group 33. The screening group 33 can screen and dry granular raw materials with different particle sizes, thereby preventing the granular raw materials from piling up together, enabling the granular raw materials to be in full contact with hot air, and ensuring that the granular raw materials are thoroughly dried.

[0063] Refer to Figure 2 、 Figure 7 、 Figure 10 and Figure 11 , the screening group 33 includes a screening plate 331 fixedly installed on one side of the lifting plate 31 close to the middle of the rotary drying cylinder 11. A plurality of diversion grooves are arranged evenly from left to right on the side of the screening plate 331 in the same rotation direction as the rotary drying cylinder 11, and the positions of the diversion grooves correspond one by one to the comb-shaped holes of the material distribution plate 32. A plurality of screening holes 332 are arranged evenly along the length direction of the diversion grooves in the diversion grooves, and the aperture of the screening holes 332 closer to the middle of the rotary drying cylinder 11 is larger.

[0064] Preferably, the included angle between the screening plate 331 and the lifting plate 31 is an obtuse angle (not shown in the figure).

[0065] The screening group 33 is used for screening dry granular raw materials; specifically, when the granular raw materials are removed from the lifting plate 31 through the comb teeth holes of the material distribution plate 32, the granular raw materials can move into the diversion grooves of the screening plate 331 corresponding to the comb teeth holes and move along the diversion grooves in the direction close to the middle of the rotary drying cylinder 11, so that the granular raw materials can pass through the screening holes 332 and move out of the screening plate 331 and fall into the rotary drying cylinder 11 under the action of gravity. At the same time, since the aperture of the screening holes 332 closer to the middle of the rotary drying cylinder 11 is larger, when the granular raw materials move along the diversion grooves in the direction close to the middle of the rotary drying cylinder 11, the granular raw materials with smaller particle sizes can move out of the screening plate 331 from the screening holes 332 first. Due to the relatively large diameter of the rotary drying cylinder 11, when the rotary drying cylinder 11 rotates, the rotary drying cylinder 11 drives the lifting plate 31 to rotate at a relatively small linear speed. When all the granular raw materials on the lifting plate 31 are removed from the lifting plate 31, the inclination angle of the end of the lifting plate 31 close to the middle of the rotary drying cylinder 11 that is inclined downward is always at a relatively small inclination angle, so that the moving speed of the granular raw materials along the diversion grooves in the direction close to the middle of the rotary drying cylinder 11 is relatively small, ensuring that the granular raw materials can move out of the screening plate 331 from the screening holes 332, thereby realizing the screening and drying of the granular raw materials, enabling the granular raw materials to be in full contact with hot air, and ensuring that the granular raw materials are thoroughly dried.

[0066] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lithium extraction drying device by sulfuric acid method, comprising a rotary dryer, the rotary dryer includes a continuously rotating rotary drying cylinder, and a plurality of lifters are fixedly installed in the rotary drying cylinder, and it is characterized in that, A dispersion unit is installed on the left side of the rotary drying drum, and a screening and drying unit is installed on the right side of the rotary drying drum; The dispersion unit includes a plurality of material-dispensing plates fixedly installed in the rotary drying drum, with baffle plates fixedly installed at both left and right ends of the material-dispensing plates, the baffle plates are fixed between the rotary drying drum, and one end of the two baffle plates on the opposite side and close to the middle of the rotary drying drum is jointly installed with a dispersion plate through a rotating member, and a plurality of dispersion holes of a conical structure are opened on the dispersion plate, the baffle plate is used to cooperate with the material-dispensing plate to dispense the raw materials, and the raw materials can only be moved out of the material-dispensing plate from the dispersion holes of the dispersion plate, and a dispersion group for dispersing the raw materials is installed on the material-dispensing plate; The screening and drying unit comprises a plurality of lifting plates fixedly mounted in the rotary drying drum, a material dividing plate with a comb-shaped structure is fixedly mounted on one end of the lifting plate and the rotary drying drum on the same side of the rotating direction and close to the middle of the rotary drying drum, and a screening group for screening and drying granular raw materials is mounted on the lifting plate; The material-shifting plates and the lifting plates are uniformly arranged in the circumferential direction with respect to the corresponding copying plates.

2. The lithium extraction and drying equipment by sulfuric acid method according to claim 1, characterized in that, The rotating member includes a rotating shaft rotatably mounted on two baffle plates, and torsion springs are connected between the rotating shaft and the two baffle plates. The surface of the rotating shaft is in contact with one side of the material-diverting plate close to the middle of the rotary drying cylinder. The rotating shaft is fixedly connected to the dispersion plate, and the dispersion plate is initially arranged vertically to the material-diverting plate.

3. The lithium extraction and drying equipment by sulfuric acid method according to claim 1, characterized in that, A feed plate is rotatably installed on the left side of the rotary drying cylinder, a feed port is provided on the feed plate, and the feed plate is fixedly connected to the fixed end of the rotary dryer, an arc-shaped plate is fixedly installed on the upper front part of the right end of the feed plate, and an arc-shaped plate is also distributed inside the rotary drying cylinder and to the right of the rightmost shifting plate, and a plurality of shifting blocks evenly arranged in an arc shape are fixedly installed on one end of the opposite sides of the left and right arc-shaped plates close to the middle part of the rotary drying cylinder, and a matching plate with an arc structure is fixedly installed on one end of the arc-shaped plate away from the middle part of the rotary drying cylinder.

4. A lithium extraction drying device by the sulfuric acid method according to claim 3, characterized in that, The spreading group includes a sliding plate radially slidably mounted on the material stripping plate, and the sliding plate is located at one end of the material stripping plate close to the middle of the rotary drying cylinder, the sliding plate is connected to the material stripping plate through a plurality of return springs evenly arranged left and right, a sealing plate is fixedly mounted on the sliding plate, and the sealing plate is in contact with the rotary drying cylinder, and a spreading plate is fixedly mounted on the middle of one side of the sealing plate away from the sliding plate.

5. The sulfuric acid method for lithium extraction drying equipment according to claim 4, characterized in that, A toggle rod is fixedly installed on the left end of the sliding plate on the far left and the right end of the sliding plate on the far right. The toggle rod radially slides through the corresponding material-digging plate and material-blocking plate in turn. One end of the toggle block close to the middle of the rotary drying cylinder is set as an inclined surface matching the toggle rod. A square synchronization rod is fixedly installed between the two adjacent sliding plates on the left and right, and the square synchronization rod slides through its corresponding material-digging plate and material-blocking plate.

6. The lithium sulfate extraction drying equipment according to claim 3, characterized in that, The side of the material-shifting plate away from the middle of the rotary drying drum is set as a hollow structure, and an alignment plate is radially slidably installed in the hollow structure of the material-shifting plate through a plurality of top extension springs evenly arranged left and right, and a plurality of alignment holes evenly arranged front and back are set on the alignment plate, and a plurality of staggered holes staggered with the alignment holes are opened on the material-shifting plate.

7. The lithium extraction and drying equipment by sulfuric acid method according to claim 6, characterized in that, At the middle of the left end of the leftmost alignment plate and the middle of the right end of the rightmost alignment plate, fitting rods are fixedly installed, and the fitting rods sequentially slide through the corresponding material pushing plates and material blocking plates. The lower end of the fitting plate is provided with an inclined surface that cooperates with the fitting rod. A synchronizing plate is fixedly installed between two adjacent alignment plates on the left and right, and the synchronizing plate slides through the corresponding material pushing plates and material blocking plates.

8. A lithium extraction drying device by the sulfuric acid method according to claim 1, characterized in that, A distribution plate is fixedly installed on the common side of the two material blocking plates. The distribution plate is located on the side where the material pushing plate and the rotary drying cylinder rotate in the same direction. A plurality of rectangular holes are radially and uniformly arranged on the distribution plate. A plurality of evenly distributed flow equalizing plate groups are fixedly installed on the side of the material pushing plate facing the distribution plate. Each flow equalizing plate group includes a plurality of flow equalizing plates that are evenly arranged from left to right.

9. The lithium extraction and drying equipment by sulfuric acid method according to claim 1, characterized in that, Two baffles arranged symmetrically from left to right are fixedly installed among the lifting plate, the material distributing plate, and the rotary drying cylinder. A plurality of triangular plates are fixedly installed on the side of the material distributing plate away from the middle of the rotary drying cylinder, and the triangular plates correspond one by one to the comb-like structures of the material distributing plate.

10. A lithium extraction drying device by sulfuric acid method according to claim 1, characterized in that, The screening group includes a screening plate fixedly installed on the side of the lifting plate close to the middle of the rotary drying cylinder. A plurality of guide grooves are evenly arranged from left to right on the side of the screening plate where the rotary drying cylinder rotates in the same direction. The positions of the guide grooves correspond one by one to the comb-like holes of the material distributing plate. A plurality of screening holes are evenly arranged along the length direction of the guide grooves in the guide grooves, and the aperture of the screening holes closer to the middle of the rotary drying cylinder is larger.

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