CN211233877U - External heating type rotary furnace for spodumene acidification roasting - Google Patents
External heating type rotary furnace for spodumene acidification roasting Download PDFInfo
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- CN211233877U CN211233877U CN201922161959.4U CN201922161959U CN211233877U CN 211233877 U CN211233877 U CN 211233877U CN 201922161959 U CN201922161959 U CN 201922161959U CN 211233877 U CN211233877 U CN 211233877U
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Abstract
The utility model discloses an external heating type rotary furnace for spodumene acidification roasting, a furnace body is supported by a rolling ring on a supporting device, and a transmission device drives the furnace body to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the cylinder body, and a crushing screw and/or a free screw which freely moves along the inner cavity are arranged in the furnace body; the jacket device is provided with an air inlet and an air outlet; the feeding device adopts a double-spiral mixing blade structure or a single-spiral continuous blade structure; ash removing screws are arranged at the two ends of the furnace body at the feeding and discharging device. The external heating type rotary furnace heats materials in a continuous and indirect mode, and reduces the acid-containing flue gas treatment process; the purity of acid clinker produced by spodumene acidification roasting reaction is improved, the phenomenon of insufficient reaction caused by too low temperature reaction is effectively avoided, the materials are prevented from wall bonding in the furnace body, and the phenomenon of insufficient reaction caused by reduced heat transfer efficiency caused by wall bonding is prevented.
Description
Technical Field
The utility model relates to an external heating type rotary furnace for spodumene acidification roasting, in particular to an external heating type rotary furnace for spodumene and sulfuric acid mixed heating acidification reaction to prepare spodumene acid clinker production process.
Background
After spodumene is discovered, lithium as a rare metal element plays a very important role in modern construction, and is widely applied to a plurality of fields such as glass, ceramics, petroleum, chemical engineering, metallurgy, synthetic rubber, light metal welding, lubricating materials, nuclear power generation, high-energy batteries, air conditioners, refrigeration equipment, military requirements and the like. With the development of new energy technology, the demand of lithium batteries is rapidly increasing, and the demand of lithium salts is also increasing. Under the trend of increasing demand for high-nickel ternary lithium batteries and materials, the demand for spodumene, the raw material for preparing lithium salts, is more vigorous.
The existing method for extracting the lithium from the spodumene is mainly a sulfuric acid method, and the core process step of the method is the process for preparing the spodumene acid clinker by acidizing and roasting. The working principle of the internal heating type rotary furnace is that gas generated after fuel is combusted is directly introduced into a rotary furnace body after the temperature is reduced to the process requirement temperature through air distribution, and high-temperature gas directly contacts with materials in the furnace body, so that the treatment process of high-temperature acidification roasting of spodumene is realized. The working principle of the external heating type rotary furnace is that gas generated after fuel is combusted is subjected to forced heat exchange with the outer wall of a furnace body, and materials in the furnace body are heated through heat transfer outside the furnace body, so that the process of preparing the acid clinker is realized.
In the production process of the existing internal heating type rotary furnace for acidizing and roasting spodumene, heat-carrying gas directly contacts with a spodumene mixed acid material to generate a large amount of acid-containing gas, tail gas has large amount, and the acid-containing gas is difficult to purify; meanwhile, a large amount of powdery raw materials are taken away along with tail gas, so that the loss of the raw materials is large; the internal heating reaction temperature is not easy to control, and when the reaction temperature is too high, the vaporization decomposition amount of the sulfuric acid is larger in the reaction process, so that the consumption amount of the sulfuric acid is increased. The heat-carrying gas directly contacts with the materials to bring certain impurities to the raw materials, thereby reducing the purity of the product.
The existing externally heated rotary furnace for spodumene acidification roasting only has a material turning and shoveling plate in a furnace body, so that the problems that materials absorb heat in the heating process to generate viscosity and are easy to adhere to the inner wall of the furnace body cannot be solved, finally the heat transfer of the furnace body is poor, the materials are blocked in the furnace body, and the continuous production is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an external heating type rotary furnace for spodumene acidizing calcination. The external heating type rotary furnace heats materials in a continuous and indirect mode, heat-carrying gas is not in direct contact with spodumene acid mixture, tail gas does not contain acid gas, and acid-containing flue gas treatment procedures are reduced; the material reaction is isolated from the outside in an external heating type indirect heating mode, so that the purity of acid clinker generated by spodumene acidification roasting reaction is improved, and the workload of subsequent purification is reduced. The external heating jacket can be provided with a plurality of air inlets and air outlets, and reasonable air distribution is carried out according to the temperature condition required by material reaction, so that the temperature of the material reaction is more reasonable, and the insufficient reaction caused by too low temperature is effectively avoided; the sulfuric acid is vaporized and decomposed due to overhigh temperature, the consumption of the sulfuric acid is reduced, and the production cost is reduced. The free spiral arranged in the furnace body can avoid the materials from forming walls in the furnace body, and prevent the phenomenon of insufficient reaction caused by the reduction of heat transfer efficiency caused by wall forming.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
according to an embodiment provided by the utility model, the utility model provides an external heating type rotary furnace for spodumene acidification roasting, which comprises a furnace body, a supporting device, a rolling ring, a large gear ring, a clamping sleeve device, a sealing device, a transmission device, a feeding device and a discharging device, wherein the furnace body is supported by the rolling rings I and II on the supporting device, and the transmission device drives the furnace body to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the cylinder body, and a crushing screw and/or a free screw which freely moves along the inner cavity are arranged in the furnace body; the jacket device is provided with an air inlet and an air outlet; the feeding device adopts a double-helix mixing blade structure or a single-helix continuous blade structure, the head of the furnace body at the feeding device is provided with an ash removal helix II, and the tail of the furnace body at the discharging device is provided with an ash removal helix I.
To above-mentioned technical scheme, the utility model discloses still further preferred scheme.
Preferably, the feeding device comprises a feeding conveyor, a feeding box and a sealing device, the double-helix mixing paddle structure adopted by the feeding conveyor comprises a shell, two helical shafts which are connected with a driving device and a coupling in the shell and are distributed along the length direction of the barrel, paddles are distributed on the helical shafts, and the paddles are distributed in a staggered manner according to an angle of 90 degrees and/or 180 degrees.
Preferably, the feeding conveyor is replaced by a feeding chute, and the feeding chute is communicated with the feeding box.
Preferably, the two screw shafts are oppositely rotated, and one screw shaft rotates in a forward direction and the other screw shaft rotates in a reverse direction.
Preferably, the crushing screw freely moving along the inner cavity of the furnace body is arranged at the feeding device end of the furnace body, and the free screw freely moving along the inner cavity of the inner furnace body is arranged at the middle section of the furnace body.
Preferably, the crushing screw is of a shaftless screw structure, a plurality of parallel pull rods are distributed along the circumferential direction of the screw blade, and the pull rods are fixedly connected with the screw blade; the outer diameter of the crushing screw is 0.2-0.9 times of the inner diameter of the furnace body.
Preferably, the free screw is of a shaft screw structure, spiral blades are distributed along the length direction of the screw shaft, and the screw shaft is fixedly connected with the spiral blades; the outer diameter of the free spiral is 0.1-0.5 times of the inner diameter of the furnace body.
Preferably, the furnace body is provided with 2-10 wireless temperature sensors, and the wireless temperature sensors feed temperature information back to the central control room through a wireless temperature receiver outside the furnace body.
Preferably, the inner cavity of the furnace body is provided with material copying plates distributed along the radial direction of the inner wall of the furnace body, and the material copying plates are distributed at the rear end inside the furnace body.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1) this rotary furnace feeding conveyor adopts double helix compounding paddle structure, makes the material intensive mixing even when conveying material into furnace body inside, can make the reaction more abundant.
2) The rotary furnace adopts an external heating type indirect heating mode, heat-carrying gas is not directly contacted with spodumene mixed acid material, and tail gas does not contain acid gas, so that the acid-containing flue gas treatment process is reduced; the material reaction is isolated from the outside in an external heating type indirect heating mode, so that the purity of acid clinker generated by spodumene acidification roasting reaction is improved, and the workload of subsequent purification is reduced.
3) The crushing screw and/or the free screw move freely in the furnace body, so that the materials can be prevented from being bonded and adhered to the wall, and can be stirred to ensure that the materials are mixed more uniformly and the reaction is more sufficient.
4) The material copying plates distributed at the rear part in the furnace body can reduce the abrasion of materials to the inner wall of the furnace body, prolong the service life of equipment, reduce the cost and increase the economic benefit.
5) The deashing spiral at furnace body both ends can be with advancing, go out the dust propelling movement between workbin and the furnace body, avoid the dust to pile up when too much to cause the influence to sealing device is sealed.
Drawings
In order that the present invention may be more readily and clearly understood, reference is now made to the following detailed description of the invention taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic structural view of an externally heated rotary kiln for spodumene acid roasting of the present invention;
FIG. 2 is a schematic view of the feed conveyor configuration;
fig. 3 is a schematic view of the cartridge device.
The reference numbers in the figures denote: 1. a feed conveyor; 2. a feeding box; 3. a sealing device; 4. rolling a ring I; 5. a jacket device; 6. an air outlet; 7. a furnace body; 8. rolling a ring II; 9. a large gear ring; 10. a discharging box; 11. a discharge port; 12. a transmission device; 13. a riding wheel blocking device; 14. an air inlet; 15. a riding wheel device; 16. a drive device; 17. a coupling; 18. a screw shaft; 19. a paddle; 20. a housing; 21. crushing the screw; 22. free helicity; 23. a material copying plate; 24. a deashing spiral I; 25. a temperature measuring device; 26. and a deashing screw II.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the external heating type rotary furnace for spodumene acidification roasting comprises a furnace body 7, wherein a rolling ring I4 and a rolling ring II 8 are arranged on the furnace body 7 and are respectively supported by a riding wheel blocking device 13 and a riding wheel device 15; the bull gear 9 is arranged on the furnace body 7 close to the riding wheel blocking device 13, and drives the furnace body 7 to continuously rotate on the supporting riding wheel blocking device 13 and the riding wheel device 15 through meshing transmission with a pinion on the transmission device 12; the main motor in the transmission device 12 adopts a variable-frequency speed-regulating motor, and can meet the requirements on the rotating speed of the furnace body 7 under different working conditions. The front end of the furnace body 7 is provided with a feeding conveyor 1 and a feeding box 2, and a sealing device 3 is arranged between the feeding box 2 and the furnace body 7; the discharging box 10 is positioned at the rear end of the furnace body 7, a discharging port 11 is arranged on the discharging box, and materials are discharged from the discharging port 11 and enter the next working procedure; a plurality of wireless temperature sensors 25 for measuring the temperature of the material are arranged on the furnace body 7; the wireless temperature sensor 25 feeds back the temperature information of the measured materials to the central control room through the wireless temperature receiver outside the furnace body 7, and adjusts the amount of hot air passing through the inside of the jacket device 5 in time through the fed-back temperature information and the material sampling detection condition, so that the materials fully react at a reasonable reaction temperature. A sealing device 3 is arranged between the discharging box 10 and the furnace body 7; the sealing device 3 has good sealing performance, can effectively prevent acid mist and dust in the furnace body 7 from overflowing to pollute the environment, reduces the consumption of sulfuric acid and saves the production cost.
The jacket device 5 arranged on the furnace body 7 can be provided with one or more air inlets 14 and one or more air outlets 6; the heat-carrying gas enters a hot air channel formed by the jacket device 5, the furnace body 7 and the sealing device 3 from the air inlet 14, and indirectly heats the materials; the jacket device 5 adopts an internal heat insulation structure, and is simple and convenient to install and maintain. The sealing devices 3 at the two ends of the jacket device 5 effectively prevent hot air from overflowing and reduce heat loss.
As shown in fig. 2, in order to mix the spodumene acid mixture uniformly and rapidly into the furnace body 7, a feeding conveyor 1 is provided at the front end of the furnace body 7, and the structure of the feeding conveyor may be a double helix mixing blade structure or a single helix continuous blade structure. The feeding conveyor 1 with the double-helix mixing blade structure comprises a shell 20, a driving device 16 and a coupler 17 in the shell 20 are connected with two spiral shafts 18 distributed along the length direction of a cylinder, and blades 19 are distributed on the spiral shafts 18. When the device works, the driving device 16 drives the screw shaft 18 to rotate through the coupler 17, the double screws rotate in a forward direction and a reverse direction, materials can be fully stirred through the blades 19 on the screw shaft 18, so that the materials are mixed more uniformly and react more fully, and meanwhile, the materials are conveyed into the furnace body 7.
This feeding conveyor 1's feeding mode can be replaced for the feeding elephant trunk mode, and the feeding elephant trunk is connected with the feeding case, and inside the feeding elephant trunk export stretched into furnace body 7, the material got into inside furnace body 7 through the elephant trunk.
Referring to fig. 3, a crushing screw 21 and/or a free screw 22 freely moving along the inner cavity of the inner furnace body 7 are arranged in the furnace body 7, the crushing screw 21 is arranged at the feeding device end of the furnace body 7, and the free screw 22 is arranged at the middle section of the furnace body 7. The crushing screw 21 is of a shaftless screw structure, a plurality of parallel pull rods are distributed along the circumferential direction of the screw blade, and the pull rods are fixedly connected with the screw blade; the outer diameter of the crushing screw 21 is 0.2-0.9 times of the inner diameter of the furnace body 7. The free screw 22 is of a shaft screw structure, and helical blades are distributed along the length direction of the screw shaft; the outer diameter of the free spiral 22 is 0.1-0.5 times of the inner diameter of the furnace body 7. Broken spiral 21 and free spiral 22 can set up alone also can set up simultaneously, and its effect is broken caking material, makes the compounding more abundant, can also prevent that the material from gluing the wall, has the effect of stirring material simultaneously.
The material copying plate 23 is distributed at the rear end inside the furnace body 7, and the material copying plate 23 is distributed along the radial direction of the inner wall of the inner cavity of the furnace body, so that the abrasion of materials to the furnace body 7 can be reduced, and the service life of equipment is prolonged.
Ash removal spiral II 26 and ash removal spiral I24 are arranged at the feeding end and the discharging end of the furnace body, and dust deposited between the feeding box and the discharging box and the furnace body 7 can be pushed into the feeding box and the discharging box, so that the dust accumulation is avoided.
It should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the above embodiments, or some features may be replaced with others.
Any modification, equivalent replacement, improvement, etc. within the spirit, principle and purpose of the present invention and the knowledge of those skilled in the art should be included in the protection scope of the present invention.
Claims (10)
1. An external heating type rotary furnace for spodumene acidification roasting comprises a furnace body (7), a supporting device, rolling rings, a large gear ring (9), a jacket device (5), a sealing device (3), a transmission device (12), a feeding device and a discharging device, wherein the furnace body (7) is supported by the rolling rings I and II (4 and 8) on the supporting device, and the transmission device (12) drives the furnace body (7) to rotate through gear meshing transmission; the feeding device and the discharging device are respectively arranged at the front end and the rear end of the cylinder body, and the jacket device (5) is provided with an air inlet and an air outlet (14 and 6), and is characterized in that a crushing screw (21) and/or a free screw (22) which freely move along the inner cavity is arranged in the furnace body (7); the feeding device adopts a spiral structure; and the head of the furnace body of the feeding device and the tail of the furnace body of the discharging device are respectively provided with an ash removal screw.
2. The external heating type rotary furnace for spodumene acidification roasting according to claim 1, characterized in that the feeding device comprises a feeding conveyor (1), a feeding box (2) and a sealing device (3), the feeding conveyor (1) adopts a double-helix mixing blade structure and comprises a shell (20), a screw shaft (18) which is connected with a driving device (16) and a coupling (17) in the shell (20) and is distributed along the length direction of the cylinder, blades (19) are distributed on the screw shaft (18), and the blades (19) are distributed in a staggered way according to an angle of 90 degrees and/or 180 degrees.
3. External heating rotary furnace for spodumene acid roasting according to claim 2, characterized in that the feed conveyor (1) is of single-helix continuous-blade construction.
4. External heat rotary furnace for spodumene acid roasting according to claim 2, characterized in that the feed conveyor (1) is replaced by a feed chute, which is connected to the feed box (2).
5. The external heating type rotary kiln for spodumene acid roasting of claim 2 wherein said screw shafts (18) are two, one rotating in forward direction and one rotating in reverse direction.
6. The external heating type rotary furnace for spodumene acid roasting according to claim 1, characterized in that the crushing screw (21) freely moving along the inner cavity of the furnace body (7) is provided at the feeding device end of the furnace body (7), and the free screw (22) freely moving along the inner cavity of the inner furnace body (7) is provided at the middle section of the furnace body (7).
7. The external heating type rotary furnace for spodumene acid roasting according to claim 6, characterized in that the crushing screw (21) is of a shaftless screw structure, a plurality of parallel pull rods are distributed along the circumferential direction of the screw blade, and the pull rods are fixedly connected with the screw blade; the outer diameter of the crushing screw (21) is 0.2-0.9 times of the inner diameter of the furnace body (7).
8. The external heating type rotary furnace for spodumene acidification roasting according to claim 1 or 6, characterized in that the free screw (22) is of a shaft screw structure, helical blades are distributed along the length direction of the screw shaft, and the screw shaft is fixedly connected with the helical blades; the outer diameter of the free spiral (22) is 0.1-0.5 times of the inner diameter of the furnace body (7).
9. The external heating type rotary furnace for spodumene acidification roasting according to claim 1, characterized in that the furnace body (7) is provided with 2-10 wireless temperature sensors (25), and the wireless temperature sensors (25) are connected to a central control room through a wireless temperature receiver outside the furnace body.
10. The external heating type rotary furnace for spodumene acidification roasting according to claim 1, characterized in that the inner cavity of the furnace body (7) is provided with material copying plates (23) distributed along the radial direction of the inner wall of the furnace body, and the material copying plates (23) are distributed at the rear end inside the furnace body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922161959.4U CN211233877U (en) | 2019-12-05 | 2019-12-05 | External heating type rotary furnace for spodumene acidification roasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922161959.4U CN211233877U (en) | 2019-12-05 | 2019-12-05 | External heating type rotary furnace for spodumene acidification roasting |
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| Publication Number | Publication Date |
|---|---|
| CN211233877U true CN211233877U (en) | 2020-08-11 |
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| CN201922161959.4U Active CN211233877U (en) | 2019-12-05 | 2019-12-05 | External heating type rotary furnace for spodumene acidification roasting |
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| CN (1) | CN211233877U (en) |
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Effective date of registration: 20210611 Address after: Room 607, block C, Chuangye building, No.16, Gaoxin 1st Road, high tech Zone, Xi'an, Shaanxi 710000 Patentee after: Xi'an SanRui unconventional energy development Co.,Ltd. Address before: 710077 7th floor, block D, Tangfeng International Plaza, 18 Fenghui South Road, high tech Zone, Xi'an City, Shaanxi Province Patentee before: XI'AN SUNRISE INDUSTRIAL Co.,Ltd. |