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CN-224215796-U - Iron phosphate sintering rotary kiln

CN224215796UCN 224215796 UCN224215796 UCN 224215796UCN-224215796-U

Abstract

The utility model discloses an iron phosphate sintering rotary kiln, which comprises a hearth and a roller, wherein a plurality of shoveling plates are arranged on the periphery of the inner wall of the roller, a plurality of radiation-proof plates which are matched with the shoveling plates to ensure that materials are uniformly mixed are fixed on the inner wall of the roller at intervals, the radiation-proof plates are gear-shaped and comprise main plates, the middle of the main plates are used for blocking the materials, and toothed plates which are matched with the shoveling plates to ensure that the materials are uniformly mixed are arranged on the periphery of the main plates at intervals. The material uniformly passes through the gaps between the radiation-proof plate and the inner wall of the roller, and is lifted by the cooperation of the radiation-proof plate and the shoveling plate, so that the material is heated uniformly, the material has long retention time and more uniform sintering, meanwhile, impurities in the material are promoted to volatilize sufficiently, the sintering performance of the ferric phosphate is further improved, the energy consumption is reduced, the radiation-proof plate has a certain blocking effect on introduced hot air, the mixing time and mixing efficiency of volatilized gas in the roller are increased, the moisture is prevented from condensing in a pipeline, the dehumidifying efficiency is improved, the removing efficiency of volatile substances is improved, and the S content in a finished product of the ferric phosphate is greatly reduced.

Inventors

  • XUAN HAIBO
  • LIU SHILEI
  • ZHANG CAN
  • SU QIANG
  • Cui Shaokui
  • Lv Congjiang
  • SHI JUNFENG
  • SHI YINGFEI

Assignees

  • 山东锂源科技有限公司
  • 常州锂源新能源科技有限公司

Dates

Publication Date
20260508
Application Date
20250507

Claims (8)

  1. 1. The iron phosphate sintering rotary kiln comprises a kiln (1), wherein the kiln (1) comprises a hearth (2) and a roller (3), a plurality of shoveling plates (10) are arranged on the circumference of the inner wall of the roller (3), and the iron phosphate sintering rotary kiln is characterized in that a plurality of radiation protection plates (4) which are matched with the shoveling plates (10) at intervals to enable materials to be uniformly mixed are fixed on the inner wall of the roller (3), the radiation protection plates (4) are gear-shaped, a main plate (4-1) for blocking the materials is arranged in the middle of the radiation protection plates, and toothed plates (4-2) which are matched with the shoveling plates (10) to enable the materials to be uniformly mixed are arranged on the periphery of the main plate (4-1) at intervals.
  2. 2. The iron phosphate sintering rotary kiln according to claim 1, characterized in that a plurality of convex plates (13) are arranged on the inner wall of the roller (3) at intervals, and the toothed plate (4-2) is in threaded connection with the convex plates (13).
  3. 3. The iron phosphate sintering rotary kiln according to claim 1, characterized in that the toothed plate (4-2) has a rectangular structure, and 4-10 groups are arranged.
  4. 4. The iron phosphate sintering rotary kiln according to claim 3, wherein the toothed plate (4-2) is 40-60 cm long, 20-35 cm wide and 1-5 cm thick.
  5. 5. The iron phosphate sintering rotary kiln according to claim 1, characterized in that the main plate (4-1) has a circular structure.
  6. 6. The iron phosphate sintering rotary kiln according to claim 5, characterized in that the thickness of the main plate (4-1) is 1-5 cm.
  7. 7. The iron phosphate sintering rotary kiln according to claim 1, characterized in that the feeding end of the roller (3) is provided with an exhaust port (11), and the discharging end is provided with a hot air blower (12) for introducing hot air to dehumidify the roller (3).
  8. 8. The iron phosphate sintering rotary kiln according to claim 6, characterized in that the feeding end of the roller (3) is also provided with a bag-type dust collector (6) for filtering and recycling the air discharged from the exhaust port (11).

Description

Iron phosphate sintering rotary kiln Technical Field The utility model relates to iron phosphate production equipment, in particular to an iron phosphate sintering rotary kiln. Background With the continuous development of new energy, the lithium ion battery gradually replaces the traditional nickel-hydrogen battery due to the advantages of high capacity, good circularity, no pollution, long service life and the like. The positive electrode material of the lithium ion battery plays a decisive role in battery performance and mainly comprises lithium cobaltate, lithium iron phosphate, lithium manganate and ternary materials, wherein the lithium iron phosphate has the advantages of high safety, long cycle life, low manufacturing cost and the like, and is one of the positive electrode materials of the lithium ion battery with the most potential. However, the sintering process of the iron phosphate is one of key procedures affecting the performance of the lithium iron phosphate. At present, rotary kilns are adopted for sintering, but the circulation of materials in the traditional rotary kilns is not uniform enough, the sintering effect is not uniform, the consistency of the indexes of finished iron phosphate products is poor, and the performance of the lithium iron phosphate battery is seriously affected. Disclosure of utility model The utility model aims to solve the problem of poor uniformity of the performance of sintered iron phosphate of the traditional rotary kiln, and provides an iron phosphate sintered rotary kiln. The technical scheme is that the iron phosphate sintering rotary kiln comprises a kiln body, wherein the kiln body comprises a hearth and a roller, a plurality of shoveling plates are arranged on the periphery of the inner wall of the roller, a plurality of radiation protection plates which are matched with the shoveling plates to enable materials to be mixed uniformly are fixed on the inner wall of the roller at intervals, the radiation protection plates are gear-shaped and comprise main plates, the middle of each main plate is used for blocking the materials, and toothed plates which are matched with the shoveling plates to enable the materials to be mixed uniformly are arranged on the periphery of each main plate at intervals. Further, the inner wall of the roller is provided with a plurality of convex plates at intervals, and the toothed plates are in threaded connection with the convex plates to fix the radiation-proof plate on the inner wall of the roller. In the sintering process, the roller continuously rotates, the material rotates and advances after entering, and when the material encounters the radiation-proof plate, the material passes through a gap between the radiation-proof plate and the inner wall of the roller due to the blocking of the radiation-proof plate, and the shoveling plate lifts the material, so that the material is heated uniformly. Further, the toothed plate is in a rectangular structure, 4-10 groups are arranged, the tooth plate is 40-60 cm long, 20-35 cm wide the thickness is 1-5 cm; the mainboard is circular structure, and its thickness is 1~5cm. The diameter of the hearth roller is combined, and the uniformity of material mixing is improved by adjusting the size and thickness of the main plate and the toothed plate and the number of groups of the toothed plate. In addition, the setting of mainboard and pinion rack size, especially the mainboard can not set up too big, and the hot air forms the convection current with the material that advances in the cylinder to satisfy, and the hot air that the board of heat radiation has certain blocking effect to the hot air of introducing simultaneously, promotes the dwell time and the dispersibility of hot air in the material, and then promotes volatile gas's in the material removal efficiency and dehumidification efficiency. Further, the feeding end of the roller is provided with an exhaust port, the discharging end of the roller is provided with a hot air blower for introducing hot air to dehumidify the roller, and the feeding end of the roller is also provided with a cloth bag dust remover for filtering and recycling the air discharged from the exhaust port. The end of the roller is introduced with dehumidified hot air, the hot air and the evaporated water are mixed into tail gas with low moisture content to be discharged from the exhaust port of the feeding end, and the exhaust temperature is improved by blending part of the hot air according to the exhaust temperature, so that the exhaust moisture is prevented from forming condensation in the exhaust pipeline and the dust removing equipment, and the sintering performance of the materials is affected. Compared with the prior art, the method has the advantages that 1, the radiation protection plates are arranged at intervals, materials need to uniformly pass through gaps between the radiation protection plates and the inner wall of the roller after a certain distance,