CN114933332A - Method for producing lithium manganate by composite raw materials - Google Patents
Method for producing lithium manganate by composite raw materials Download PDFInfo
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- CN114933332A CN114933332A CN202210630125.7A CN202210630125A CN114933332A CN 114933332 A CN114933332 A CN 114933332A CN 202210630125 A CN202210630125 A CN 202210630125A CN 114933332 A CN114933332 A CN 114933332A
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- lithium manganate
- manganese dioxide
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- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 239000002994 raw material Substances 0.000 title claims abstract description 33
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000000463 material Substances 0.000 claims abstract description 71
- 238000002156 mixing Methods 0.000 claims abstract description 35
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 27
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 27
- 239000011572 manganese Substances 0.000 claims abstract description 27
- 239000000843 powder Substances 0.000 claims abstract description 27
- 150000002642 lithium compounds Chemical class 0.000 claims abstract description 20
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000227 grinding Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 14
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 7
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 12
- 239000011345 viscous material Substances 0.000 claims description 12
- 238000005469 granulation Methods 0.000 claims description 11
- 230000003179 granulation Effects 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 10
- 238000002390 rotary evaporation Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- 238000001694 spray drying Methods 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims description 6
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 claims description 4
- 229910052808 lithium carbonate Inorganic materials 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000002360 preparation method Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 102000004310 Ion Channels Human genes 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/12—Manganates manganites or permanganates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/40—Electric properties
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to the technical field of lithium manganate, in particular to a method for producing lithium manganate by using a composite raw material, which comprises the following steps: s1, preparing raw materials: 20-30 parts of lithium compound, 10-20 parts of manganese dioxide, 5-15 parts of electrolytic manganese dioxide and 5-10 parts of vinylene carbonate; s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide to obtain a primary manganese source material, and processing the mixed primary manganese source material into superfine grinding powder by using a ball grinding type fine grinding machine to obtain manganese source powder; s3, mixing powder: the lithium hydroxide adopted in the invention can ensure better energy density of the lithium manganate production material, the lithium hydroxide also has certain reaction activity, and meanwhile, the lithium salt can be fully filled into micropores among the mixed materials after being heated and mixed, so that the production time is shortened, and the production efficiency of the lithium manganate is high.
Description
Technical Field
The invention relates to the technical field of lithium manganate, in particular to a method for producing lithium manganate by using a composite raw material.
Background
The lithium manganate is mainly spinel lithium manganate, is a cathode material with a three-dimensional lithium ion channel, has been paid great attention to by researchers until now, has the advantages of low price, high potential, environmental friendliness, high safety performance and the like as an electrode material, and is a cathode material of a new-generation lithium ion battery.
When some lithium manganate is produced and prepared, the raw materials used by the lithium manganate cannot accelerate the production efficiency and time of the lithium manganate, the production and preparation of the lithium manganate are affected, the performance of the produced lithium manganate is unsatisfactory, and the production steps of the lithium manganate are complicated, so that the method for producing the lithium manganate by using the composite raw materials is urgently needed to be researched and developed.
Disclosure of Invention
The invention aims to provide a method for producing lithium manganate by using a composite raw material, which aims to solve the problems that the production efficiency and time of the raw material used for the lithium manganate cannot be accelerated, the performance of the lithium manganate is not ideal, and the production steps are relatively complicated.
The technical scheme of the invention is as follows: a method for producing lithium manganate by using composite raw materials comprises the following steps:
s1, preparing raw materials: 20-30 parts of lithium compound, 10-20 parts of manganese dioxide, 5-15 parts of electrolytic manganese dioxide and 5-10 parts of vinylene carbonate;
s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide to obtain a primary manganese source material, and processing the mixed primary manganese source material into superfine grinding powder by using a ball mill type fine grinding machine to obtain manganese source powder;
s3, mixing powder: mixing manganese source powder and a lithium compound in a clean vessel and heating for a period of time to obtain a mixture;
s4, blending and processing: adding a certain proportion of aqueous solution and vinylene carbonate into the mixture, and then stirring the mixture in a sealed kettle to obtain a blending material;
s5, pressure evaporation treatment: under the condition of certain pressure, the blending material is treated by rotary evaporation to be made into viscous material;
s6, spray drying: drying the viscous material by using a spray dryer, and preserving the heat of the dried material after a period of time;
s7, granulation roasting: granulating the materials by using a granulator to obtain a lithium manganate material with an intact structure, putting the lithium manganate material into a roasting machine body for roasting to obtain the finally produced lithium manganate, and transferring the lithium manganate to a storage room for later use.
Further, in the S1, the lithium compound is one or two of lithium carbonate, lithium hydroxide, lithium salt and lithium chloride, and in the S2, the ratio of manganese dioxide to electrolytic manganese dioxide is 5: 1.
Further, in the S3, the manganese source powder and the lithium compound are mixed in a clean vessel, the mixing speed is 40-90 r/min, and the mixture is heated to 650 ℃ at 300-.
Further, in the step S4, the aqueous solution, vinylene carbonate and the mixture were added in a ratio of 3:1:7, and the mixture was stirred in a sealed pot clockwise.
Further, in the step S4, the rotation speed during stirring in the sealed kettle is 50-100 rpm, and the stirring can be carried out for 15-25 minutes.
In S5, the ingredient is subjected to rotary evaporation using a rotary evaporator under a pressure of 660Pa during the pressure evaporation.
Further, in the step S6, drying the viscous material by using a spray dryer, wherein the drying time is controlled to be 20-60 minutes, and the dried material is kept at 23-30 ℃ for heat preservation.
Further, in the step S7, the granulator performs granulation processing on the material to make the material into granular material with a diameter of 8-15mm, and screens out crushed material in the granular material to remove unqualified products.
Further, in the S7, the lithium manganate material is put into a roasting body for roasting, the roasting temperature is 750-1100 ℃, and the roasting time is controlled to be 7-18 hours.
Further, in the step S7, the finally produced lithium manganate is cooled in a counter-flow type cooling machine, the cooling time is 10 to 20 minutes, and then the lithium manganate is transferred to a storage room.
Compared with the prior art, the method for producing the lithium manganate by the composite raw material has the following improvements and advantages:
(1) the lithium hydroxide adopted in the invention can ensure better energy density of the lithium manganate production material, the lithium hydroxide also has certain reaction activity, and the lithium salt can fully enter micropores among the mixed materials after being heated and mixed, so that the production time is shortened, and the production efficiency of the lithium manganate is high.
(2) After manganese source powder of manganese dioxide and electrolytic manganese dioxide are mixed, the processing activity in the production and preparation of lithium manganate is improved, and the discharge capacity of a lithium manganate production material battery can be further increased.
(3) The vinylene carbonate in the invention can stabilize and improve the discharge capacity of the lithium manganate and maintain the excellent performance of the lithium manganate, and the lithium manganate is formed with high efficiency by the rotary evaporation, spray drying and other production steps of the composite raw material, and the lithium manganate is produced and processed with high quality and rapidly by granulation roasting and other production steps.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a first schematic production flow diagram of the present invention;
FIG. 2 is a second schematic flow chart of the present invention;
FIG. 3 is a third schematic flow diagram of the present invention.
Detailed Description
The present invention will be described in detail below with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example one
A method for producing lithium manganate by using composite raw materials comprises the following steps:
s1, preparing raw materials: 20 parts of lithium compound, 20 parts of manganese dioxide, 5 parts of electrolytic manganese dioxide and 5 parts of vinylene carbonate, wherein the lithium compound is lithium carbonate and lithium chloride;
s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide, wherein the ratio of the manganese dioxide to the electrolytic manganese dioxide is 5:1, obtaining a primary manganese source material, and processing the mixed primary manganese source material into superfine grinding powder by using a ball-milling type fine grinding machine to obtain manganese source powder;
s3, mixing powder: mixing manganese source powder and lithium compound in a clean vessel and heating for a period of time, wherein the mixing speed is 40 revolutions per minute, and the heating is carried out to 300 ℃, so as to obtain a mixture;
s4, blending and processing: adding a certain proportion of aqueous solution and vinylene carbonate into the mixture, wherein the proportion of the added aqueous solution, the vinylene carbonate and the mixture is 3:1:7, stirring clockwise in a sealed kettle, and stirring for 15 minutes at a rotating speed of 50 revolutions per minute in the sealed kettle to obtain a blending material;
s5, pressure evaporation treatment: the blending material is subjected to rotary evaporation treatment by using a rotary evaporator under the pressure condition of 660Pa during pressure evaporation treatment, so that the blending material is prepared into a viscous material;
s6, spray drying: drying the viscous material by using a spray dryer, controlling the drying time to be 30 minutes, and preserving the heat of the dried material at 26 ℃;
s7, granulation roasting: granulating the materials by using a granulator to make the materials into granular materials with the diameter of 8mm, screening out crushed materials in the granular materials to remove unqualified products, obtaining the lithium manganate material with an intact structure after granulation, putting the lithium manganate material into a roasting machine body for roasting, controlling the roasting temperature to be 850 ℃, controlling the roasting time to be 8 hours to obtain the finally produced lithium manganate, cooling the finally produced lithium manganate in a counter-flow type cooler for 12 minutes, and transferring the lithium manganate to a storage room for later use.
Example two
A method for producing lithium manganate by using composite raw materials comprises the following steps:
s1, preparing raw materials: 30 parts of lithium compound, 20 parts of manganese dioxide, 5 parts of electrolytic manganese dioxide and 7 parts of vinylene carbonate, wherein the lithium compound is lithium hydroxide and lithium salt;
s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide, wherein the ratio of the manganese dioxide to the electrolytic manganese dioxide is 5:1 to obtain a preliminary manganese source material, and processing the mixed preliminary manganese source material into superfine grinding powder by using a ball-grinding type fine grinding machine to obtain manganese source powder;
s3, mixing powder: mixing manganese source powder and lithium compound in a clean vessel and heating for a period of time, wherein the mixing speed is 80 revolutions per minute, and the heating is carried out to 650 ℃, so as to obtain a mixture;
s4, blending and processing: adding a certain proportion of aqueous solution and vinylene carbonate into the mixture, wherein the proportion of the added aqueous solution, the vinylene carbonate and the mixture is 3:1:7, stirring clockwise in a sealed kettle, and stirring for 20 minutes at a rotation speed of 90 revolutions per minute in the sealed kettle to obtain a blending material;
s5, pressure evaporation treatment: the blending material is subjected to rotary evaporation treatment by using a rotary evaporator under the pressure condition of 660Pa during pressure evaporation treatment, so that the blending material is prepared into a viscous material;
s6, spray drying: drying the viscous material by using a spray dryer, controlling the drying time to be 50 minutes, and preserving the heat of the dried material at 24 ℃;
s7, granulation roasting: granulating the materials by using a granulator to make the materials into granular materials with the diameter of 10mm, screening out crushed materials in the granular materials to remove unqualified products, obtaining the lithium manganate material with an intact structure after granulation, putting the lithium manganate material into a roasting machine body for roasting, controlling the roasting temperature at 1000 ℃, controlling the roasting time duration at 15 hours to obtain the finally produced lithium manganate, cooling the finally produced lithium manganate in a counter-flow type cooler for 15 minutes, and transferring the lithium manganate to a storage room for later use.
EXAMPLE III
A method for producing lithium manganate by using composite raw materials comprises the following steps:
s1, preparing raw materials: 25 parts of lithium compound, 20 parts of manganese dioxide, 5 parts of electrolytic manganese dioxide and 8 parts of vinylene carbonate, wherein the lithium compound is lithium carbonate;
s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide, wherein the ratio of the manganese dioxide to the electrolytic manganese dioxide is 5:1 to obtain a preliminary manganese source material, and processing the mixed preliminary manganese source material into superfine grinding powder by using a ball-grinding type fine grinding machine to obtain manganese source powder;
s3, mixing powder: mixing manganese source powder and a lithium compound in a clean vessel and heating for a period of time, wherein the mixing speed is 85 revolutions per minute, and the heating is carried out to 600 ℃, so as to obtain a mixture;
s4, blending and processing: adding a certain proportion of aqueous solution and vinylene carbonate into the mixture, wherein the proportion of the added aqueous solution, the vinylene carbonate and the mixture is 3:1:7, stirring clockwise in a sealed kettle, wherein the rotating speed of the stirring in the sealed kettle is 80 revolutions per minute, and stirring for 23 minutes to obtain a blending material;
s5, pressure evaporation treatment: the blending material is subjected to rotary evaporation treatment by using a rotary evaporator under the pressure condition of 660Pa during pressure evaporation treatment, so that the blending material is prepared into a viscous material;
s6, spray drying: drying the viscous material by using a spray dryer, controlling the drying time to be 45 minutes, and preserving the heat of the dried material at 26 ℃;
s7, granulation roasting: granulating the materials by using a granulator to make the materials into granular materials with the diameter of 12mm, screening out crushed materials in the granular materials to remove unqualified products, obtaining the lithium manganate material with an intact structure after granulation, putting the lithium manganate material into a roasting machine body for roasting, controlling the roasting temperature at 980 ℃ and the roasting time duration at 12 hours to obtain the finally produced lithium manganate, cooling the finally produced lithium manganate in a counter-flow type cooler for 20 minutes, and transferring the lithium manganate to a storage room for later use.
In the first embodiment, the second embodiment and the third embodiment, different lithium compounds are adopted, the amount of the composite raw materials is different, the production temperature and the production time are different, other parameters are consistent, and the effect is the best in the second embodiment by comparing the finally obtained lithium manganate through experiments.
The working principle is as follows: the three groups of embodiments are obtained through experiments and preparation, the lithium manganate prepared in the second embodiment has better effect, the composite raw material in the second embodiment adopts lithium compounds of lithium hydroxide and lithium salt, the lithium hydroxide material can ensure better energy density of the lithium manganate as a production material, and has certain reaction activity, the efficiency of reaction production is high, the lithium salt can fully enter micropores between the mixture materials after being heated and mixed, the production time is shortened, manganese source powder of manganese dioxide and electrolytic manganese dioxide is mixed, the electrolytic manganese dioxide is added into the manganese dioxide, the processing activity in the production preparation is large, the capacity of the lithium manganate battery is large, vinylene carbonate can stabilize and improve the discharge capacity of the lithium manganate, the excellent performance of the lithium manganate is maintained, the production quality of the lithium manganate is improved after the raw materials are mixed, and the forming efficiency of the lithium manganate material is accelerated during rotary evaporation and spray drying, and then the lithium manganate is subjected to production steps of granulation, roasting and the like, and is cooled and stored, so that the lithium manganate is produced with high quality and fast speed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for producing lithium manganate by composite raw materials is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing raw materials: 20-30 parts of lithium compound, 10-20 parts of manganese dioxide, 5-15 parts of electrolytic manganese dioxide and 5-10 parts of vinylene carbonate;
s2, doping electrolytic manganese dioxide: putting manganese dioxide into a holding tank, adding electrolytic manganese dioxide into the manganese dioxide to obtain a primary manganese source material, and processing the mixed primary manganese source material into superfine grinding powder by using a ball mill type fine grinding machine to obtain manganese source powder;
s3, mixing powder: mixing manganese source powder and a lithium compound in a clean vessel and heating for a period of time to obtain a mixture;
s4, blending and processing: adding a certain proportion of aqueous solution and vinylene carbonate into the mixture, and then stirring the mixture in a sealed kettle to obtain a blending material;
s5, pressure evaporation treatment: under the condition of a certain degree of pressure, the blending materials are subjected to rotary evaporation treatment to prepare the blending materials into viscous materials;
s6, spray drying: drying the viscous material by using a spray dryer, and preserving the heat of the dried material after a period of time;
s7, granulation roasting: and granulating the materials by using a granulator to obtain a lithium manganate material with a complete structure, putting the lithium manganate material into a roasting machine body for roasting to obtain the finally produced lithium manganate, and transferring the lithium manganate to a storage room for use.
2. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: in the S1, the lithium compound is one or two of lithium carbonate, lithium hydroxide, lithium salt and lithium chloride, and in the S2, the ratio of manganese dioxide to electrolytic manganese dioxide is 5: 1.
3. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: in the S3, the manganese source powder and the lithium compound are mixed in a clean vessel, the mixing speed is 40-90 r/min, and the mixture is heated to 650 ℃ at 300-.
4. The method for producing lithium manganate by using composite raw materials according to claim 1, wherein: in the S4, the ratio of the added aqueous solution, the vinylene carbonate and the mixture is 3:1:7, and the mixture is stirred clockwise in a sealed kettle.
5. The method for producing lithium manganate by using composite raw materials according to claim 1, wherein: in the S4, the rotation speed of the sealed kettle during stirring is 50-100 r/min, and the stirring can be carried out for 15-25 min.
6. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: in S5, the ingredient is subjected to rotary evaporation treatment using a rotary evaporator under a pressure condition of 660Pa during the pressure evaporation treatment.
7. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: and in the S6, drying the viscous material by using a spray dryer, wherein the drying time is controlled to be 20-60 minutes, and the dried material is kept at 23-30 ℃ for heat preservation.
8. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: and S7, granulating the materials by using a granulator to make the materials into granular materials with the diameter of 8-15mm, and screening out crushed materials in the granular materials to remove unqualified products.
9. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: and in the S7, putting the lithium manganate material into a roasting body for roasting, wherein the roasting temperature is 750-1100 ℃, and the roasting time is controlled to be 7-18 hours.
10. The method for producing lithium manganate by using composite raw material according to claim 1, wherein: and in the step S7, cooling the finally produced lithium manganate in a counter-flow type cooler for 10-20 minutes, and transferring the lithium manganate to a storage room.
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