A roller hearth kiln for the calcination production of lithium carbonate

Abstract

The present application relates to chemical material preparation technical field, especially to a kind of roller kiln for calcining preparation lithium carbonate, including bottom plate, the rotary kiln module is rotatably connected by left and right two supports on the bottom plate upper end, the rotary kiln module right end is equipped with dispersion piece, and dispersion piece outer surface is rotatably connected with blanking piece.The existing rotary kiln is directly poured into a large amount of lithium spodumene concentrate in the tail of rotary kiln for drying treatment when drying lithium spodumene concentrate, then sintering is carried out, but the above-mentioned method can make lithium spodumene concentrate appear the phenomenon of accumulation when drying, cause part lithium spodumene concentrate appear the phenomenon of not completely dry.The roller kiln for calcining preparation lithium carbonate provided in the present application can carry out a small amount of multiple drying treatment to a large amount of lithium spodumene concentrate by blanking piece and dispersion piece cooperation, avoid the phenomenon of accumulation of lithium spodumene concentrate when drying, thereby improve the effect of lithium spodumene concentrate drying.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical material preparation, and particularly relates to a roller kiln for preparing lithium carbonate by roasting. BACKGROUND

[0002] Lithium carbonate is an inorganic compound, which is mainly used for preparing ceramics, glass, ferrite and the like, and can also be used as a silver paste spraying element.

[0003] The existing lithium carbonate is usually prepared by lime sintering method, in which lithium spodumene concentrate and limestone are mixed, ground and then sintered in a rotary kiln. The lithium spodumene concentrate needs to be dried before sintering, and the lithium spodumene concentrate is dried by using high-temperature gas generated in the preheating section of the kiln tail to remove the moisture on the surface of the lithium spodumene concentrate. The existing rotary kiln directly pours a large amount of lithium spodumene concentrate into the tail of the rotary kiln for drying treatment, and then sintering.

[0004] The above drying method can process a large amount of lithium spodumene concentrate at a time, improve the drying efficiency of the lithium spodumene concentrate, and reduce the drying time of the lithium spodumene concentrate. However, the above method can cause the lithium spodumene concentrate to accumulate during drying, resulting in incomplete drying of part of the lithium spodumene concentrate, which is not conducive to the sintering of the lithium spodumene concentrate and reduces the drying effect of the lithium spodumene concentrate. SUMMARY

[0005] The technical problem to be solved: the roller kiln for preparing lithium carbonate by roasting provided by the present application can solve the above-mentioned problems existing in the drying of lithium spodumene concentrate.

[0006] Technical scheme: In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme, a roller kiln for preparing lithium carbonate by roasting, comprising a bottom plate, a rotary kiln module is rotatably connected to the upper end of the bottom plate through left and right two supports, a dispersion piece is installed at the right end of the rotary kiln module, a falling piece is rotatably connected to the outer surface of the dispersion piece, and the falling piece is installed on the bottom plate through a mounting block.

[0007] The dispersion piece comprises a cylindrical frame installed at the right end of the rotary kiln module, a plurality of uniformly distributed gas outlets are formed in the left and right two frame walls of the cylindrical frame, a falling hole is formed in the upper end of the cylindrical frame, a discharging hole is formed in the left end of the cylindrical frame close to the falling hole, a blocking unit is installed in the falling hole, two symmetrical first blocking plates are installed on the inner ring surface of the annular wall of the cylindrical frame, a plurality of uniformly distributed dispersion rods are rotatably connected between the left and right two frame walls of the cylindrical frame away from the gas outlets, a plurality of transmission units are installed on the left end of the cylindrical frame and distributed from right to left, the plurality of transmission units are coaxial and staggered, and the right wall of the cylindrical frame is connected with a pushing unit.

[0008] As a preferred technical scheme of the present application, the conveying unit comprises a partition plate installed on the inner ring surface of the rotary kiln module, a plurality of uniformly distributed exhaust holes are formed in the partition plate, a material conveying port is formed at one end of the partition plate, a plurality of linearly and uniformly distributed partition rods are installed at the middle of the right end of the partition plate, a guide plate installed inside the rotary kiln module is arranged at the right side of the partition plate close to the material conveying port, a leakage hole is formed in the guide plate, and two No. 2 partition plates are symmetrically installed at the right end of the partition plate away from the guide plate.

[0009] As a preferred technical scheme of the present application, the blanking piece comprises a circular frame rotatably connected to the outer surface of the rotary kiln module, the lower end of the circular frame is installed on the bottom plate through a mounting block, an exhaust pipe is installed through the right wall of the circular frame, a feeding hole is formed in the upper end of the circular frame, a feeding frame is installed in the feeding hole, a feeding unit is installed on the upper end of the circular frame, and an arc-shaped protruding plate is installed on the inner end face of the right side wall of the circular frame.

[0010] As a preferred technical scheme of the present application, the feeding unit comprises two L-shaped rods symmetrically installed on the upper end of the circular frame, a blanking cylinder is jointly installed between the two L-shaped rods, two discharge through holes are symmetrically formed in the annular wall of the blanking cylinder, a blanking roller is rotatably connected in the blanking cylinder, a material collecting groove is formed in the blanking roller, the output shaft of a driving motor is fixedly connected to the rear end of the blanking roller, the driving motor is installed at the rear end of the blanking cylinder, and a guide frame is installed in the upper discharge through hole.

[0011] As a preferred technical scheme of the present application, the pushing unit comprises a T-shaped pushing rod slidingly and penetratingly connected to the right wall of the cylindrical frame, a triangular block is installed at the left end of the T-shaped pushing rod, an auxiliary roller is rotatably connected to the end of the triangular block away from the T-shaped pushing rod, and an auxiliary spring is installed between the right side of the T-shaped pushing rod and the cylindrical frame and sheathed on the T-shaped pushing rod.

[0012] As a preferred technical scheme of the present application, the blocking unit comprises a connecting block installed in the blanking hole, a rotating plate rotatably connected to the inner ring surface of the cylindrical frame is arranged below the blanking hole, and a connecting spring is installed between the rotating plate and the connecting block.

[0013] As a preferred technical scheme of the present application, a sliding groove is formed at the left end of the arc-shaped protruding plate, and a plurality of uniformly distributed circular through holes are formed in the arc-shaped protruding plate.

[0014] As a preferred technical scheme of the present application, a moving bead is rotatably connected to the right end of the T-shaped pushing rod, and the moving bead is slidingly matched with the sliding groove.

[0015] Beneficial effects: 1. The falling part and the dispersing part of the roller kiln for preparing lithium carbonate by roasting can process a large amount of spodumene concentrate in a small amount of multiple drying processes, avoid the accumulation of spodumene concentrate during drying, and improve the drying effect of spodumene concentrate.

[0016] 2. The multiple conveying units of the roller kiln for preparing lithium carbonate by roasting can continuously disperse the spodumene concentrate, facilitate the drying of the spodumene concentrate by the tail gas generated by the rotary kiln module, prolong the drying time of the spodumene concentrate, and avoid incomplete drying of the spodumene concentrate. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and examples.

[0018] Figure 1 is the first perspective view of the present application.

[0019] Figure 2 is the second perspective view of the present application.

[0020] Figure 3 is the front view of the present application.

[0021] Figure 4 is the left view of the present application.

[0022] Figure 5 is the cross-sectional view of A-A in the present application. Figure 4

[0023] Figure 6 is the enlarged view of N in the present application. Figure 5

[0024] Figure 7 is the enlarged view of X in the present application. Figure 5

[0025] Figure 8 is the perspective view of the present application.

[0026] ​​​In the figure: 1, bottom plate; 2, rotary kiln module; 3, dispersion piece; 31, cylindrical frame; 311, air outlet hole; 312, blanking hole; 313, discharge hole; 32, blocking unit; 321, connecting block; 322, rotating plate; 323, connecting spring; 33, dispersion rod; 34, No. 1 blocking plate; 35, conveying unit; 351, spacing plate; 3511, material conveying port; 3512, air outlet hole; 352, separation rod; 353, guide plate; 354, No. 2 blocking plate; 36, pushing unit; 361, T-shaped pushing rod; 362, triangular block; 363, auxiliary spring; 4, blanking piece; 41, circular frame; 42, exhaust pipe; 43, feeding frame; 44, feeding unit; 441, L-shaped rod; 442, blanking cylinder; 443, blanking roller; 444, driving motor; 445, guide frame; 45, arc convex plate. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below with reference to the drawings, but the present application can be implemented in various different ways limited and covered by the claims.

[0028] Referring to Figures 1-5 A roller kiln for baking lithium carbonate includes a bottom plate 1, a rotary kiln module 2 rotatably connected to the upper end of the bottom plate 1 through left and right two supports, a dispersion piece 3 installed at the right end of the rotary kiln module 2, and a blanking piece 4 rotatably connected to the outer surface of the dispersion piece 3 and installed at the lower end of the bottom plate 1 through a mounting block.

[0029] Referring to Figure 5 and Figure 8 The blanking piece 4 includes a circular frame 41 rotatably connected to the outer surface of the rotary kiln module 2, the circular frame 41 being installed at the lower end of the bottom plate 1 through a mounting block, an exhaust pipe 42 being installed through the right wall of the circular frame 41, a feeding hole being formed in the upper end of the circular frame 41, a feeding frame 43 being installed in the feeding hole, a feeding unit 44 being installed at the upper end of the circular frame 41, an arc convex plate 45 being installed at the inner end face of the right side wall of the circular frame 41, a sliding groove being formed at the left end of the arc convex plate 45, and a plurality of circular through holes being formed in the arc convex plate 45.

[0030] Referring to Figure 5 and Figure 8 The feeding unit 44 includes two L-shaped rods 441 symmetrically installed at the upper end of the circular frame 41, a blanking cylinder 442 being commonly installed between the two L-shaped rods 441, two discharge through holes being symmetrically formed in the annular wall of the blanking cylinder 442, a blanking roller 443 being rotatably connected in the blanking cylinder 442, a material collecting groove being formed in the blanking roller 443, an output shaft of a driving motor 444 being fixedly connected to the rear end of the blanking roller 443, the driving motor 444 being installed at the rear end of the blanking cylinder 442, and a guide frame 445 being installed in the upper discharge through hole.

[0031] Referring to Figure 5 and Figure 8 , in particular, the rotary kiln module 2 is started, which is an existing rotary kiln device, and then the driving motor 444 is started to drive the feeding cylinder 442 to rotate, and the crushed spodumene concentrate is continuously put into the guide frame 445 through the existing feeding device. When the material collecting groove opening on the feeding roller 443 turns to the upper side, the spodumene concentrate falls into the material collecting groove through the upper discharge hole, and as the feeding roller 443 rotates, when the material collecting groove opening turns to the lower side, the spodumene concentrate in the material collecting groove falls into the feeding frame 43 through the lower discharge hole. The spodumene concentrate in the feeding frame 43 falls into the dispersion device 3, thereby realizing the function of intermittent feeding.

[0032] Referring to Figure 5 , Figure 6 and Figure 8 , the dispersion device 3 comprises a cylindrical frame 31 installed at the right end of the rotary kiln module 2, a plurality of evenly distributed air outlets 311 are formed on the left and right frame walls of the cylindrical frame 31, a feeding hole 312 is formed at the upper end of the cylindrical frame 31, a discharge hole 313 is formed at the left end of the cylindrical frame 31 close to the feeding hole 312, a blocking unit 32 is installed in the feeding hole 312, two symmetrical first blocking plates 34 are installed on the inner ring surface of the annular wall of the cylindrical frame 31, a plurality of evenly distributed dispersion rods 33 are rotatably connected between the left and right frame walls of the cylindrical frame 31 away from the air outlets 311, a plurality of transmission units 35 are installed at the left end of the cylindrical frame 31 and distributed from right to left, the plurality of transmission units 35 are coaxial and staggered, and the right wall of the cylindrical frame 31 is connected with a pushing unit 36.

[0033] Referring to Figure 5 , Figure 6 and Figure 8 , in particular, the rotary kiln module 2 drives the cylindrical frame 31 to rotate, the cylindrical frame 31 drives the blocking unit 32 and the pushing unit 36 to rotate, the pushing unit 36 contacts the arc-shaped protruding plate 45 during rotation, the arc-shaped protruding plate 45 pushes the pushing unit 36, the pushing unit 36 is forced to push the blocking unit 32, the blocking unit 32 rotates, the spodumene concentrate in the feeding frame 43 enters the cylindrical frame 31 through the feeding hole 312, the dispersion rods 33 in the cylindrical frame 31 collide with the spodumene concentrate to disperse it, and can also separate the larger concentrate from the smaller concentrate, thereby facilitating the removal of water from the spodumene concentrate. As the rotary kiln module 2 continues to rotate, the pushing unit 36 gradually separates from the arc-shaped protruding plate 45, the blocking unit 32 gradually resets, the cylindrical frame 31 moves the spodumene concentrate to the upper side through the first blocking plate 34 and drops, the dropped spodumene concentrate is discharged from the discharge hole 313 to the transmission unit 35 through the blocking unit 32, and the transmission unit 35 discharges the spodumene concentrate into the rotary kiln module 2 for calcination.

[0034] Referring to Figure 6 , the pushing unit 36 comprises a T-shaped pushing rod 361 slidingly connected to the right wall of the cylindrical frame 31, a triangular block 362 is installed at the left end of the T-shaped pushing rod 361, an auxiliary roller is rotatably connected to the end of the triangular block 362 away from the T-shaped pushing rod 361, an auxiliary spring 363 is installed between the right side of the T-shaped pushing rod 361 and the cylindrical frame 31, a moving bead is rotatably connected to the right end of the T-shaped pushing rod 361, and the moving bead is in sliding fit with the sliding groove.

[0035] Referring to Figure 7 , the blocking unit 32 comprises a connecting block 321 installed in the blanking hole 312, and a rotating plate 322 is rotatably connected to the inner ring surface of the cylindrical frame 31 below the blanking hole 312, and a connecting spring 323 is installed between the rotating plate 322 and the connecting block 321.

[0036] Referring to Figures 5-7 , in particular, when working, the rotary kiln module 2 drives the cylindrical frame 31 to rotate, the cylindrical frame 31 drives the rotating plate 322 and the T-shaped pushing rod 361 to move at the same time, the T-shaped pushing rod 361 moves to the arc-shaped protruding plate 45, the moving bead on the T-shaped pushing rod 361 cooperates with the sliding groove on the arc-shaped protruding plate 45, with the rotation of the rotary kiln module 2, the arc-shaped protruding plate 45 pushes the T-shaped pushing rod 361, the T-shaped pushing rod 361 drives the auxiliary roller on the triangular block 362 to push the rotating plate 322, and the rotating plate 322 is rotated under stress, so that part of the lithium spodumene concentrate in the feeding frame 43 enters the cylindrical frame 31 through the blanking hole 312, the rotary kiln module 2 continues to rotate, the T-shaped pushing rod 361 gradually separates from the arc-shaped protruding plate 45, the T-shaped pushing rod 361 is reset through the auxiliary spring 363, the connecting spring 323 drives the rotating plate 322 to reset, and part of the lithium spodumene concentrate entering the feeding frame 43 can avoid the accumulation of a large amount of lithium spodumene concentrate, which is convenient for the heat of the tail gas in the rotary kiln module 2 to dry the lithium spodumene concentrate, and improves the drying effect of the lithium spodumene concentrate.

[0037] Referring to Figure 5 and Figure 8 , the conveying unit 35 comprises a spacing plate 351 installed on the inner ring surface of the rotary kiln module 2, a plurality of evenly distributed air exhaust holes 3512 are formed in the spacing plate 351, a material conveying port 3511 is formed at one end of the spacing plate 351, a plurality of straight and evenly distributed partition rods 352 are installed at the right end of the spacing plate 351, a guide plate 353 is installed on the right side of the spacing plate 351 close to the material conveying port 3511, the guide plate 353 is installed in the rotary kiln module 2, the guide plate 353 is provided with an air leakage hole, and two No. 2 blocking plates 354 are symmetrically installed at the right end of the spacing plate 351 away from the guide plate 353.

[0038] Referring to Figure 5 and Figure 8 , in particular, spodumene concentrate is discharged through the discharge hole 313 to the rightmost two second partition plates 354, the rotary kiln module 2 drives the second partition plate 354 to rotate, the second partition plate 354 drives the spodumene concentrate to rotate to the highest point, the spodumene concentrate falls from the high place and contacts the partition rod 352, the partition rod 352 disperses the spodumene concentrate, thereby facilitating the drying treatment of the spodumene concentrate, the spodumene concentrate falls on the guide plate 353 through the partition rod 352, the guide plate 353 guides the spodumene concentrate into the left two interval plates 351, and the previous steps are repeated until the leftmost guide plate 353 conveys the dried spodumene concentrate into the rotary kiln module 2, the rotary kiln module 2 calcines the spodumene concentrate, and after calcination, the spodumene concentrate is taken out of the rotary kiln module 2, and the roasting is completed.

[0039] When roasting: S1: start the rotary kiln module 2, then start the driving motor 444, the driving motor 444 drives the discharging cylinder 442 to rotate, the existing feeding equipment continuously puts the crushed spodumene concentrate into the guide frame 445, and when the material collecting groove opening on the discharging cylinder 442 turns to the upper side, the spodumene concentrate falls into the material collecting groove through the upper discharging through hole.

[0040] S2: with the rotation of the discharging cylinder 442, when the material collecting groove opening turns to the lower side, the spodumene concentrate in the material collecting groove falls into the feeding frame 43 through the lower discharging through hole, and the spodumene concentrate in the feeding frame 43 falls into the dispersing piece 3.

[0041] S3: the rotary kiln module 2 drives the cylindrical frame 31 to rotate, the cylindrical frame 31 drives the partition unit 32 and the pushing unit 36 to rotate, the pushing unit 36 contacts the arc-shaped raised plate 45 during rotation, the arc-shaped raised plate 45 pushes the pushing unit 36, the pushing unit 36 is forced to push the partition unit 32, the partition unit 32 rotates, and the spodumene concentrate in the feeding frame 43 enters the cylindrical frame 31 through the discharging hole 312.

[0042] S4: with the continuous rotation of the rotary kiln module 2, the pushing unit 36 gradually separates from the arc-shaped raised plate 45, the partition unit 32 gradually resets, the cylindrical frame 31 moves the spodumene concentrate to the upper side through the first partition plate 34 and falls, the fallen spodumene concentrate is discharged from the discharge hole 313 into the conveying unit 35 through the partition unit 32, the conveying unit 35 discharges the spodumene concentrate into the rotary kiln module 2 for calcination, and after calcination, the spodumene concentrate is taken out of the rotary kiln module 2, and the roasting is completed.

[0043] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A roller kiln for calcining preparation of lithium carbonate, comprising a bottom plate (1), a rotary kiln module (2) is rotatably connected to the upper end of the bottom plate (1) through left and right two supports, characterized in that: The rotary kiln module (2) right end is provided with a dispersing element (3), the outer surface of the dispersing element (3) is rotatably connected with a blanking element (4), the lower end of the blanking element (4) is installed on the bottom plate (1) through a mounting block; wherein: The dispersing element (3) comprises a cylindrical frame (31) installed on the right end of the rotary kiln module (2), a plurality of uniformly distributed air outlet holes (311) are formed on the left and right frame walls of the cylindrical frame (31), a blanking hole (312) is formed on the upper end of the cylindrical frame (31), a discharging hole (313) is formed on the left end of the cylindrical frame (31) close to the blanking hole (312), a blocking unit (32) is installed in the blanking hole (312), two first blocking plates (34) are installed between the left and right end faces of the cylindrical frame (31), a plurality of uniformly distributed dispersing rods (33) are rotatably connected between the left and right frame walls of the cylindrical frame (31) away from the air outlet holes (311), a plurality of conveying units (35) are installed on the left end of the cylindrical frame (31) and distributed from right to left, the plurality of conveying units (35) are coaxial and staggered, and the right wall of the cylindrical frame (31) is connected with a pushing unit (36).

2. A roller hearth kiln for the calcination production of lithium carbonate according to claim 1, characterized in that: The conveying unit (35) comprises a spacing plate (351) installed on the inner ring surface of the rotary kiln module (2), a plurality of uniformly distributed air outlet holes (3512) are formed on the spacing plate (351), a material conveying port (3511) is formed on one end of the spacing plate (351), a plurality of straight and uniformly distributed partition rods (352) are installed on the right end of the spacing plate (351), a guide plate (353) is arranged on the right side of the spacing plate (351) close to the material conveying port (3511) and installed inside the rotary kiln module (2), air leakage holes are formed on the guide plate (353), and two second blocking plates (354) are symmetrically installed on the right end of the spacing plate (351) away from the guide plate (353).

3. A roller hearth kiln for calcining lithium carbonate produced by the method of claim 1, wherein: The blanking element (4) comprises a circular frame (41) rotatably connected to the outer surface of the rotary kiln module (2), the lower end of the circular frame (41) is installed on the bottom plate (1) through a mounting block, an exhaust pipe (42) is installed through the right wall of the circular frame (41), a feeding hole is formed on the upper end of the circular frame (41), a feeding frame (43) is installed in the feeding hole, a feeding unit (44) is installed on the upper end of the circular frame (41), and an arc-shaped protruding plate (45) is installed on the inner end face of the right side wall of the circular frame (41).

4. A roller hearth kiln for the calcination production of lithium carbonate according to claim 3, characterized in that: The feeding unit (44) comprises two L-shaped rods (441) symmetrically installed on the upper end of the circular frame (41), a blanking cylinder (442) is jointly installed between the two L-shaped rods (441), two discharge through holes are symmetrically formed on the annular wall of the blanking cylinder (442), a blanking roller (443) is rotatably connected in the blanking cylinder (442), a material collecting groove is formed on the blanking roller (443), the output shaft of a driving motor (444) is fixedly connected to the rear end of the blanking roller (443), the driving motor (444) is installed at the rear end of the blanking cylinder (442), and a guide frame (445) is installed in the upper discharge through hole.

5. A roller hearth kiln for calcining lithium carbonate produced by the method of claim 3, wherein: The pushing unit (36) comprises a T-shaped pushing rod (361) connected through sliding to the right wall of the cylindrical frame (31), a triangular block (362) is mounted at the left end of the T-shaped pushing rod (361), an auxiliary roller is rotatably connected to the end of the triangular block (362) away from the T-shaped pushing rod (361), and an auxiliary spring (363) is mounted between the right side of the T-shaped pushing rod (361) and the cylindrical frame (31) and is sleeved on the T-shaped pushing rod (361).

6. A roller hearth kiln for calcining lithium carbonate produced by the method of claim 1, wherein: The blocking unit (32) comprises a connecting block (321) mounted in the blanking hole (312), a rotating plate (322) is rotatably connected to the inner ring surface of the cylindrical frame (31) below the blanking hole (312), and a connecting spring (323) is mounted between the rotating plate (322) and the connecting block (321).

7. A roller hearth kiln for calcining lithium carbonate produced by the method of claim 5, wherein: The left end of the arc-shaped protruding plate (45) is provided with a sliding groove, and a plurality of uniformly distributed circular through holes are formed in the arc-shaped protruding plate (45).

8. A roller hearth kiln for calcining lithium carbonate produced by the method of claim 7, wherein: The right end of the T-shaped pushing rod (361) is rotatably connected with a moving bead, and the moving bead is in sliding fit with the sliding groove.

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