Method for manufacturing ceramic for calcination container through recycling of waste calcination container for secondary battery positive electrode active material

Abstract

Disclosed is a method for manufacturing ceramic for a calcination container through recycling of a waste calcination container for a secondary battery positive electrode active material. Specifically, disclosed is a method for manufacturing ceramic for a calcination container, which, by recovering valuable resources from waste calcination containers for a secondary battery positive electrode active material on the basis of a recycling technology for the waste calcination containers, most of which are being landfilled and discarded, minimizes the amount of waste resources generated, and which aims to provide high added value through recycling of the discarded waste resources.

Description

Method for manufacturing ceramics for sintering containers by recycling waste sintering containers containing secondary battery cathode active materials

[0001] The technical idea of ​​the present disclosure relates to a method for manufacturing ceramics for a firing vessel, and more specifically, to a method for manufacturing ceramics for a firing vessel, which aims to minimize the amount of waste resources generated by recovering valuable resources in the waste firing vessel based on a recycling technology for waste firing vessels containing secondary battery cathode active materials, most of which are landfilled or discarded, and to create high added value for recycling of the waste resources that are discarded.

[0002]

[0003] The secondary battery cathode active material sintering vessel is repeatedly used at high temperatures during the sintering process for manufacturing cathode active materials, resulting in deterioration of mechanical and thermal properties, and aging such as surface corrosion, peeling, and cracking due to chemical reactions with NCM powder and lithium compounds and penetration into internal pores during the sintering process, which leads to the end of its lifespan.

[0004] Waste kilns that have reached the end of their lifespan are discarded together with valuable resources such as lithium, NCM, and ceramics within the waste kilns. The lithium content within these waste ceramic kilns reaches 4-5%, and a large amount of lithium compounds (LiAlO2, LiSiO4, etc.) generated by the reaction of aluminum oxide (Al2O3) or silicon oxide (SiO2) kilns with lithium raw materials (LiCO3, LiOH H2O) are accumulated.

[0005] Accordingly, based on 1,000 tons of ceramic firing containers that are landfilled and discarded, it is expected that 4 to 5 tons of lithium, 0.5 to 1 tons of NCM powder, and more than 900 tons of ceramic powder will be discarded. Currently, in a situation where all of them are landfilled and discarded, it is urgent to develop recycling technology along with establishing an eco-friendly treatment method for recycling waste resources.

[0006] For this reason, efforts are being made recently to develop materials technology for recycling valuable resources such as lithium, nickel, cobalt, manganese, and ceramics contained in waste secondary battery cathode active material containers.

[0007]

[0008] The technical idea of ​​the present disclosure is to provide a method for manufacturing ceramics for a sintering vessel by recycling a waste sintering vessel containing a secondary battery cathode active material.

[0009] The problems to be solved by the present disclosure are not limited to the problems mentioned above, and problems to be solved by the present disclosure that are not mentioned can be clearly understood by a person having ordinary knowledge in the technical field to which the present disclosure belongs (“ordinary skilled person”) from the description below.

[0010]

[0011] In order to achieve the above purpose, a method for manufacturing a ceramic for a firing container through recycling of a waste firing container of a secondary battery cathode active material according to one aspect of the technical idea of ​​the present disclosure is provided.

[0012] The first step is to wash the surface of the waste cathode active material container of a secondary battery to remove cathode material powder on the surface;

[0013] A second step of obtaining waste kiln powder by crushing and classifying waste kiln containers that have undergone surface washing;

[0014] The third step is to heat-treat the waste sintering container powder in a carbon dioxide atmosphere to transform the lithium component in the powder into Li2CO3;

[0015] Step 4: producing a mixture containing liquid Li2CO3 and solid powder by subjecting the lithium component-transferred powder to a water leaching treatment using ultrapure water;

[0016] Step 5: filtering the mixture produced through the water leaching process to separate and recover liquid Li2CO3 and ceramic powder, respectively;

[0017] Step 6: drying the separated ceramic powder and controlling the content of impurities to produce ceramic powder for new firing containers;

[0018] It may include a seventh step of manufacturing a ceramic for a secondary battery cathode material sintering vessel and a sintering vessel using the ceramic powder for a regenerated sintering vessel and the ceramic powder for a new sintering vessel.

[0019] For example, in the first step, the cathode material powder may include NCM powder containing nickel, cobalt, and manganese.

[0020] For example, in the second step, the particle size of the waste sintering container powder may have a specification of 0.10 to 1.0 mm.

[0021] For example, the heat treatment conditions in the third step may be performed at 300 to 700 degrees Celsius for 10 to 240 minutes.

[0022] For example, the water leaching process in the fourth step may be performed for 60 to 180 minutes by mixing ultrapure water and lithium component-phase-transferred powder in a weight ratio of 1:10 to 1:30.

[0023] For example, in the fifth step, filtering may be performed using a filter having a size of 0.1 to 0.5 um.

[0024] For example, in the sixth step, the control of the impurity content may be to reduce the content of lithium components included in the separated ceramic powder by using one or more means selected from among lithium sulfate production through sulfuric acid combustion, lithium carbonate conversion, and lithium removal through high-temperature thermal reaction.

[0025] For example, in the seventh step, the ceramic powder for the regenerated sintering vessel may be used in an amount of 10 to 30 wt% based on the sum of the ceramic powder for the regenerated sintering vessel and the ceramic powder for the new sintering vessel.

[0026] Additionally, the method for manufacturing a ceramic for a firing container through recycling of a waste firing container containing a secondary battery cathode active material according to the present disclosure may include a step of recovering and drying cathode material powder obtained through surface washing of a waste firing container containing a secondary battery cathode active material and recycling it.

[0027] Additionally, the method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel containing a secondary battery cathode active material according to the present disclosure may include a step of drying the recovered liquid Li2CO3 solution to obtain Li2CO3 powder.

[0028] For example, the step of obtaining Li2CO3 powder may additionally include a step of reducing the moisture content of the Li2CO3 solution to 10 to 20 wt% through an evaporation and concentration process.

[0029] For example, the step of obtaining Li2CO3 powder may additionally include a step of obtaining Li2CO3 powder having a particle size of 0.001 to 1.0 um by drying and micronizing a Li2CO3 solution with a reduced moisture content.

[0030] For example, in the step of obtaining Li2CO3 powder, the sum of Li, Na, Ba, P, Si, K, Ca, and Cu contained in the final obtained Li2CO3 powder may be less than 0.01% based on the weight of the entire Li2CO3 powder.

[0031]

[0032] According to the method for manufacturing a ceramic for a sintering vessel by recycling a waste sintering vessel of a secondary battery cathode active material according to the technical idea of ​​the present disclosure, unlike the wet recycling process adopted to recycle existing waste secondary battery resources, a regenerated ceramic powder for manufacturing a sintering vessel can be manufactured based on a recycling process that simply utilizes dry pyrolysis and water leaching without using a strong acid or alkaline solution.

[0033] In addition, according to the method for manufacturing ceramics for a sintering vessel through recycling of a waste sintering vessel containing a secondary battery cathode active material according to the technical idea of ​​the present disclosure, lithium carbonate can be recovered with a high purity of 99.9% or more, equivalent to that of a battery.

[0034] In addition, according to the method for manufacturing ceramics for a firing vessel by recycling a waste firing vessel of a secondary battery cathode active material according to the technical idea of ​​the present disclosure, an eco-friendly and economical process can be provided that minimizes the time and cost required for acid and alkaline solution treatment processes and environmental treatment of intermediate and final products compared to a wet process.

[0035] In addition, according to the method for manufacturing a ceramic for a firing vessel by recycling a waste firing vessel of a secondary battery cathode active material according to the technical idea of ​​the present disclosure, the equipment cost and the required land size are significantly smaller than those of the existing recycling process, and since no consumables other than electricity, gas, and water are used in the process, the process cost can be reduced, and a process that can reduce the initial investment cost and the process cost can be provided.

[0036] In addition, according to the method for manufacturing a ceramic for a sintering vessel by recycling a waste sintering vessel of a secondary battery cathode active material according to the technical idea of ​​the present disclosure, there are no environmental pollutants or waste resources generated during the process, such as waste liquid or waste slurry, so that environmental treatment and waste resource treatment costs can be reduced, and a process can be provided that can secure price competitiveness by reducing the manufacturing cost by recovering high-quality Li2CO3 based on an overall low process cost.

[0037] In addition, according to the method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel for a secondary battery cathode active material according to the technical idea of ​​the present disclosure, the recycled ceramic powder manufactured from the sintering vessel can be used as a substitute for raw materials for manufacturing a new sintering vessel for a secondary battery cathode active material, and by minimizing the content of lithium and replacing 5% to 30% of the input raw materials, cost reduction is possible, and a process for establishing a secondary battery waste resource circulation system can be provided along with a reduction in environmental and industrial waste disposal costs generated through the development of a recycling technology for waste sintering vessels that are entirely discarded.

[0038] The excellent and / or useful effects according to the present disclosure are not limited to the effects of the present disclosure described above, and it should be understood that those skilled in the art will also be able to clearly recognize excellent and / or useful effects of the present disclosure that are not explicitly disclosed in the present disclosure based on the disclosure of the present specification, and that these are intentionally disclosed by the present specification and are clearly included in the scope of the present disclosure.

[0039]

[0040] FIG. 1 is a flowchart illustrating a method for manufacturing a ceramic for a firing container through recycling of a waste firing container containing a secondary battery cathode active material according to an exemplary embodiment of the present disclosure.

[0041] FIG. 2 is a diagram showing the results of XRD analysis of the powder composition of a pretreated waste sintering vessel according to an exemplary embodiment of the present disclosure.

[0042] Figure 3 is a diagram showing the results of visual observation of each process of a manufacturing method according to an exemplary embodiment of the present disclosure.

[0043]

[0044] The following description of the present invention with reference to the drawings is not limited to specific embodiments, and various modifications and embodiments may be made. Furthermore, the following description should be understood to encompass all modifications, equivalents, and alternatives within the spirit and technical scope of the present invention.

[0045] In the following description, terms such as "first," "second," etc. are used to describe various components, and are not intended to limit their meanings. They are used solely to distinguish one component from another. Furthermore, the same reference numbers used throughout this specification represent the same components.

[0046] Unless otherwise stated herein, certain steps or processes may be performed at room temperature. Room temperature may range from 15 to 30 degrees Celsius, and preferably from 20 to 25 degrees Celsius.

[0047] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "comprise," "include," or "have" used herein should be interpreted to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and should be understood to not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0048] According to one aspect of the present disclosure, a method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel containing a secondary battery cathode active material can be provided.

[0049] Secondary battery cathode active material waste containers are repeatedly used at temperatures exceeding 1200 degrees Celsius in the cathode active material manufacturing process, and are discarded due to internal and external defects, surface corrosion, and peeling caused by continuous exposure to heat changes and chemical reactions. Most of them are simply discarded and landfilled by waste disposal companies.

[0050] Meanwhile, in the case of secondary battery cathode active materials, precursors composed of Ni, Co, and Mn and lithium compounds are synthesized by high-temperature calcination to form cathode active materials. Generally, cathode active materials are synthesized by calcination at high temperatures of 1200 degrees Celsius or higher.

[0051] In addition, in order to sinter the cathode active material, a sintering vessel that has heat resistance and corrosion resistance is required. Such a ceramic sintering vessel uses corundum, mullite, and cordierite materials that are compounds composed of magnesium, silicon, etc. and have an alumina (Al2O3) content of 70% or more. The size of the sintering vessel varies depending on the cathode material manufacturer, but generally, a size of 330Х330Х75 is used.

[0052] A method for manufacturing a ceramic for a firing container by recycling a waste firing container for a secondary battery cathode active material according to the present disclosure may include a first step of washing the surface of a waste firing container for a secondary battery cathode active material to remove cathode material powder on the surface.

[0053] In the first stage, NCM powder adhered to the ceramic surface during the washing step for recycling waste kiln containers is removed and recovered. The recovered NCM powder is dried and then recycled through a wet recycling process.

[0054] The method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel containing a secondary battery cathode active material according to the present disclosure may include a second step of obtaining a waste sintering vessel powder by pulverizing and classifying a waste sintering vessel whose surface has been washed into powder.

[0055] In the second stage, the cleaned waste kiln containers are crushed using a crushing machine and then powdered using a classifier. The particle size of the powder is controlled to meet the requirements of the kiln container manufacturer for the production of new kiln containers.

[0056] The method for manufacturing a ceramic for a sintering vessel by recycling a waste sintering vessel containing a secondary battery cathode active material according to the present disclosure may include a third step of heat-treating the waste sintering vessel powder in a carbon dioxide atmosphere to phase-transform the lithium component in the powder into Li2CO3.

[0057] In the third step, the powdered waste sintered vessel is heat-treated at high temperature in a CO2 atmosphere to transform into lithium carbonate (Li2CO3), facilitating selective separation. The chemical formula for the lithium to lithium carbonate phase transition occurring in the heat treatment furnace is as follows.

[0058] Li2O(s) + CO2(g) = Li2CO3(s)

[0059] The method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel for a secondary battery cathode active material according to the present disclosure may include a fourth step of producing a mixture containing liquid Li2CO3 and solid powder by subjecting a powder in which a lithium component has undergone a phase transition to water leaching treatment using ultrapure water.

[0060] In the fourth step, the water leaching process can be performed using a stirring device, and the water leaching time and the ratio of powder to ultrapure water can be set to optimal conditions considering the reaction between lithium carbonate (Li2CO3) and ultrapure water. In the case of the water leaching process, the principle of separation is applied by utilizing the difference in solubility of lithium carbonate (Li2CO3) and other components (ceramic powder, impurities, etc.) in water. In the case of Li2CO3, it dissolves in water and changes into a liquid state, and in the case of precious metal oxides with low solubility, it exists in a powder state.

[0061] The method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel for a secondary battery cathode active material according to the present disclosure may include a fifth step of filtering a mixture produced through a water leaching process to separate and recover liquid Li2CO3 and ceramic powder, respectively.

[0062] In the fifth step, a filter process is performed to selectively recover Li2CO3 after the water leaching process. Through the filter process, a high-purity Li2CO3 solution and residual powder (ceramics, other impurities, etc.) can be separated, and by going through this step, a high purity of Li2CO3 can be secured throughout the entire process.

[0063] The method for manufacturing a ceramic for a firing vessel by recycling a waste firing vessel containing a secondary battery cathode active material according to the present disclosure may include a sixth step of drying the separated ceramic powder and controlling the content of impurities to produce a new ceramic powder for a firing vessel.

[0064] In step 6, some of the lithium components in the ceramic powder are formed as lithium ceramic compounds (e.g., LiAlO2, LiSiO2, LiAlSiO4). Some lithium components in the ceramic powder can have a beneficial effect on improving properties such as strength and heat resistance during the manufacture of the sintering vessel, so controlling the content rather than completely removing it may be desirable.

[0065] The method for manufacturing a ceramic for a sintering vessel by recycling a waste sintering vessel of a secondary battery cathode active material according to the present disclosure may include a seventh step of manufacturing a ceramic for a sintering vessel of a secondary battery cathode active material and a sintering vessel using the same by mixing and using the generated ceramic powder for a recycled sintering vessel and the ceramic powder for a new sintering vessel.

[0066] In the seventh step, the regenerated ceramic powder with controlled lithium and impurities can be used to manufacture a new sintering vessel for cathode material sintering based on improved internal porosity, thermal expansion coefficient, thermal shock resistance, etc., based on the control of composition and impurities, and the possibility of applying the ceramic powder for the regenerated sintering vessel can be determined by evaluating the apparent porosity, apparent porosity, thermal expansion coefficient, thermal shock resistance, etc. of the manufactured new sintering vessel.

[0067] For example, in the first step, the cathode material powder may include NCM powder containing nickel, cobalt, and manganese.

[0068] For example, in the second step, the particle size of the waste sintering container powder may have a specification of 0.10 to 1.0 mm.

[0069] For example, in the third step, the heat treatment conditions may be performed at 300 to 700 degrees Celsius for 10 to 240 minutes.

[0070] For example, in the fourth step, the water leaching process may be performed for 60 to 180 minutes by mixing ultrapure water and lithium component-phase-transferred powder in a weight ratio of 1:10 to 1:30.

[0071] For example, in the fifth step, the filtering may be performed using a filter with a size of 0.1 to 0.5 μm. A feasible process is to use a filter with a size of 0.1 to 0.5 μm to ensure the complete recovery of particulate impurities, thereby minimizing impurities in the lithium carbonate solution and ensuring purity.

[0072] For example, in the sixth step, the control of the impurity content may be to reduce the content of lithium components included in the separated ceramic powder by using one or more means selected from among lithium sulfate production through sulfuric acid combustion, lithium carbonate conversion, and lithium removal through high-temperature thermal reaction.

[0073] For example, in the seventh step, the ceramic powder for the regenerated sintering vessel may be used in an amount of 10 to 30 wt% based on the sum of the ceramic powder for the regenerated sintering vessel and the ceramic powder for the new sintering vessel.

[0074] Additionally, the method for manufacturing a ceramic for a firing container through recycling of a waste firing container containing a secondary battery cathode active material according to the present disclosure may include a step of recovering and drying cathode material powder obtained through surface washing of a waste firing container containing a secondary battery cathode active material and recycling it.

[0075] Additionally, the method for manufacturing a ceramic for a sintering vessel through recycling of a waste sintering vessel containing a secondary battery cathode active material according to the present disclosure may include a step of drying the recovered liquid Li2CO3 solution to obtain Li2CO3 powder.

[0076] For example, the step of obtaining Li2CO3 powder may additionally include a step of reducing the moisture content of the Li2CO3 solution to 10 to 20 wt% through an evaporation and concentration process. In this step, the solution is concentrated at a temperature lower than 100 degrees Celsius through reduced pressure evaporation, and the water vapor generated during the concentration is captured and condensed to recover distilled water. The recovered distilled water can be manufactured into ultrapure water through a deionization process and re-introduced into the process.

[0077] For example, the step of obtaining Li2CO3 powder may additionally include a step of obtaining Li2CO3 powder having a particle size of 0.001 to 1.0 um by drying and micronizing a Li2CO3 solution with a reduced moisture content.

[0078] For example, in the step of obtaining Li2CO3 powder, the sum of Li, Na, Ba, P, Si, K, Ca, and Cu contained in the final Li2CO3 powder obtained may be less than 0.01% based on the weight of the entire Li2CO3 powder.

[0079] Hereinafter, preferred embodiments of the present invention will be described. However, the following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention to the following examples.

[0080] Example: Use of the method for manufacturing a ceramic for a sintering vessel according to the present disclosure

[0081] To remove NCM powder adhered to the surface of the waste sintering vessel, surface cleaning was performed physically using ultrasonic cleaning, high-pressure cleaning, etc. to remove and recover the NCM cathode powder on the surface. The recovered cathode powder (ternary and iron phosphate) was dried and further processed to be recycled as raw materials.

[0082] After washing, the waste sintered vessel was pulverized into powder and the particle size was controlled through classification. The powdered waste sintered vessel was then placed in a heat treatment furnace and heat-treated in an air atmosphere at a temperature of 200 degrees Celsius to remove impurities. Afterwards, the ceramic powder from which the impurities had been removed was subjected to dry heat reaction at a temperature of 500 degrees Celsius for 70 minutes in a carbon dioxide gas atmosphere, thereby converting the lithium component in the ceramic powder into Li2CO3.

[0083] Next, to separate Li2CO3 from the ceramic powder, deionized ultrapure water was used at a weight ratio of 1:20 for 30 hours to 3 hours to leach Li2CO3. The water temperature was kept at room temperature (25 degrees Celsius).

[0084] In order to separate the lithium carbonate (Li2CO3) solution and solid ceramic powder separated through water leaching treatment, a high-purity lithium carbonate (Li2CO3) solution was selectively recovered through a filter process. At this time, a 0.5 um filter was used to completely separate the ceramic particles.

[0085] The recycled ceramic powder, separated from lithium carbonate and recovered, was further processed to control lithium, iron, and moisture impurities. For lithium, additional technology was used to control the lithium content to within 0.2%. For iron, a de-ionization process was used, and for moisture, a drying process was used to manufacture the recycled ceramic.

[0086] Afterwards, the recycled ceramic was used in the production of new firing containers at an amount of approximately 20%, and the firing container was manufactured and applied to the cathode material firing process.

[0087] The Li2CO3 solution was subjected to an evaporation and concentration process to minimize moisture content, thereby minimizing the energy consumed during drying. The moisture content was concentrated to approximately 10 to 30%, and evaporation and concentration were performed under reduced pressure at temperatures below 80°C. The evaporated moisture was captured, recovered, and stored for reuse in water leaching treatment. The concentrated Li2CO3 solution was then fed into a dryer to recover powdered Li2CO3.

[0088] Experimental Example 1: Analysis of physical properties of intermediate products obtained at each stage of the manufacturing method according to the present disclosure.

[0089] The particle size of the waste incinerator after crushing and classifying was measured and shown in Table 1 below.

[0090] Particle size distribution Size ratio 1.68~1.00mm 5% ≥ 1.00~0.50mm 45% ≤ 0.50~0.074mm 45% ≤~0.074mm 5% ≥

[0091] In addition, the results of ICP analysis of ceramic powder after surface washing, crushing, and classification are shown in Table 2 below.

[0092] ClassificationAlCoCuFeLiMnNiPSiTiMgRegenerated ceramics(wt%)33.4<0.02<0.02<0.021.28<0.02<0.02<0.028.620.1927.82

[0093] In addition, the results of XRD analysis of the powder composition of the spent kiln container after pretreatment are shown in Fig. 2. As a result, it was confirmed that the spent kiln container powder after pretreatment contained a large amount of NCM powder. In the case of lithium compounds and regenerated ceramics recovered through ceramic recycling in spent kiln containers, purity is the most important criterion. In the case of lithium compounds, a purity of 99.5% or higher must be secured for application as a battery grade, and in the case of regenerated ceramics, lithium, nickel, cobalt, manganese, iron, and non-ferrous metal components must be controlled to 0.2 to 0.02 or less to be applied as regenerated ceramics.

[0094] In addition, the results of visual observation of each process of the manufacturing method according to the present disclosure are shown in Fig. 3.

[0095] Experimental Example 2: Analysis of physical properties of ceramics for sintering vessels manufactured according to the manufacturing method according to the present disclosure.

[0096] The particle size of the final recovered Li2CO3 was controlled to less than 1 μm, which is suitable for use in the production of cathode active materials. The final purity was analyzed using ICP analysis. The ICP analysis was performed to identify 20 detectable inorganic elements in the final Li2CO3 powder. The results are shown in Table 3.

[0097] LiNaBaPSiKCaCuAlCd19.9%331ppm235ppm216ppm133ppm29.7ppm12.4ppm11.9ppmN / DN / DCoCrFeMgMoNiPbTiVZnN / DN / DN / DN / DN / DN / DN / DN / DN / DN / D

[0098] As a result of ICP analysis, the components detected in the final lithium carbonate (Li2CO3) were Li, Na, Ba, P, Si, K, Ca, and Cu, and the final detected amount was 0.0969%, indicating that the final purity of the recovered lithium carbonate was secured as battery-grade 3N (99.9%) or higher. As described above, exemplary embodiments have been disclosed in the drawings and specification. Although specific terms have been used to describe the embodiments in this specification, these have been used only for the purpose of explaining the technical idea of ​​the present disclosure and have not been used to limit the meaning or the scope of the present disclosure set forth in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present disclosure should be defined by the technical idea of ​​the appended claims.

Claims

1. A method for manufacturing ceramics for a firing container by recycling waste firing containers for secondary battery cathode active materials: The first step is to wash the surface of the waste cathode active material container of a secondary battery to remove cathode material powder on the surface; A second step of obtaining waste kiln powder by crushing and classifying waste kiln containers that have undergone surface washing; The third step is to heat-treat the waste sintering container powder in a carbon dioxide atmosphere to transform the lithium component in the powder into Li2CO3; Step 4: producing a mixture containing liquid Li2CO3 and solid powder by subjecting the lithium component-transferred powder to a water leaching treatment using ultrapure water; Step 5: filtering the mixture produced through the water leaching process to separate and recover liquid Li2CO3 and ceramic powder, respectively; Step 6: drying the separated ceramic powder and controlling the content of impurities to produce ceramic powder for new firing containers; A method for manufacturing a ceramic for a sintering vessel, comprising a seventh step of manufacturing a ceramic for a secondary battery cathode material sintering vessel and a sintering vessel using the ceramic powder for a regenerated sintering vessel and the ceramic powder for a new sintering vessel.

2. A method for manufacturing ceramics for a sintering vessel, wherein in the first step, the cathode material powder includes NCM powder containing nickel, cobalt, and manganese.

3. A method for manufacturing ceramics for a firing vessel, wherein in the second step, the particle size of the powder for the waste firing vessel has a specification of 0.10 to 1.0 mm.

4. A method for manufacturing ceramics for a sintering vessel, wherein in the third step, the heat treatment conditions are performed at 300 to 700 degrees Celsius for 10 to 240 minutes.

5. A method for manufacturing ceramics for a sintering vessel, wherein in the fourth step, the water leaching process is performed for 60 to 180 minutes by mixing ultrapure water and a powder in which a lithium component has undergone phase transition at a weight ratio of 1:10 to 1:

30.

6. A method for manufacturing ceramics for a sintering vessel, wherein in the fifth step, filtering is performed using a filter having a size of 0.1 to 0.5 um.

7. A method for manufacturing ceramics for a firing vessel, wherein in the sixth step, the impurity content control is performed by reducing the content of lithium components included in the separated ceramic powder by using at least one means selected from among lithium sulfate production through sulfuric acid combustion, lithium carbonate conversion, and lithium removal through high-temperature thermal reaction.

8. A method for manufacturing ceramics for a firing vessel, wherein in the seventh step, the ceramic powder for a regenerated firing vessel is used in an amount of 10 to 30 wt% based on the sum of the ceramic powder for a regenerated firing vessel and the ceramic powder for a new firing vessel.

9. A method for manufacturing ceramics for a firing container, further comprising a step of recovering and drying the positive electrode material powder obtained by washing the surface of a waste firing container for a secondary battery positive electrode active material in the first paragraph and recycling it.

10. A method for manufacturing ceramics for a sintering vessel, further comprising a step of drying the recovered liquid Li2CO3 solution to obtain Li2CO3 powder in accordance with paragraph 9.

11. A method for manufacturing ceramics for a sintering vessel, wherein in the 10th paragraph, the step of obtaining the Li2CO3 powder further includes a step of reducing the moisture content of the Li2CO3 solution to 10 to 20 wt% through an evaporation and concentration process.

12. A method for manufacturing ceramics for a firing vessel, wherein the step of obtaining the Li2CO3 powder in the 11th paragraph further includes a step of obtaining Li2CO3 powder having a particle size of 0.001 to 1.0 um by drying and micronizing a Li2CO3 solution having a reduced moisture content.

13. A method for manufacturing ceramics for a sintering vessel, wherein in the step of obtaining the Li2CO3 powder, the sum of Li, Na, Ba, P, Si, K, Ca, and Cu contained in the Li2CO3 powder finally obtained is less than 0.01% based on the weight of the entire Li2CO3 powder.

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