CAZETTE REPAIR SORRIDGE AND METHOD FOR ITS PREPARATION, CAZETTE, AND CAZETTE REPAIR METHOD

Abstract

This disclosure relates to a cazette repair slurry and a process for its preparation, a cazette, and a cazette repair process. The cazette repair slurry comprises a solid component and a liquid component, where the solid component comprises a matrix and clay, and the liquid component comprises an adhesive and water. The matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and ground cazette material. The cazette repair slurry has a solids content of 15% to 25% and a particle size of less than 5 µm and is used for immersing a scrap cazette.The cazette repair slurry can repair the scrap cazette to reduce the number of scrap cazettes generated, i.e. improve the reuse rate of scrap cazettes so that the cazette's service life can be extended and the cost of preparing positive electrode material can be reduced.

Description

Description Title of the invention: CAZETTE REPAIR MIXTURE AND PROCESS FOR ITS PREPARATION, CAZETTE, AND CAZETTE REPAIR PROCESS Technical field

[0001] = The present application relates to the technical field of lithium batteries and in particular a cazette repair porridge and a process for its preparation, a cazette, and a cazette repair process. Background

[0002] = When used to produce positive electrode materials, the cazette has a maximum number of repeated uses. After having used the maximum number of times, the cazette will be discarded. In general, the overall appearance of a reformed cazette, that is, a discarded can, changes little. However, damage such as a corrosion, cracks, or peeling are caused to the interior walls of the most of the discarded crates.

[0003] — For example, when the cazettes are used for the production of materials 811 ternary type positive electrode for lithium batteries, the cazettes are ge- generally reformed after being used for 20 or 30 cycles, so that the workshops for the production of positive electrode materials for lithium batteries generate a large number of reformed cazcttes every day. According to statistics, the cost of using the cazettes represents approximately 10% to 20% of the cost of processing of positive electrode materials for lithium batteries. In addition, a large amount of harmful metals permeate into the waste container and is difficult to process. Therefore, most manufacturers stock the pods of waste, which increases the storage load, or transfer the waste containers to related approved companies by paying a certain price, which increases the costs hidden to produce lithium batteries. Therefore, how to extend the duration of use of the can, reduce the number of waste cans generated, and de- developing a suitable process for treating old and discarded tins becomes a difficulty in reducing the production costs of an electrode material positive, and has great significance for production and technical progress regarding positive electrode materials for lithium-ion batteries. SUMMARY

[0004] — To overcome the drawbacks of the related art, the present application provides a cazette repair porridge and a process for its pre- repair, a cazette, and a cazette repair process, and the repair porridge of can and the method for its preparation can repair a waste can to reduce the number of waste cans generated, that is, improve the reuse rate of waste cans so that the use life of the can can be prolonged and the cost of preparing a positive electrode material can be reduced. This application adopts the technical solutions described below. A cazette repair slurry comprises a solid component and a liquid component, where the solid component comprises a matrix and clay and the liquid component comprises an adhesive and water. The matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and ground cazette material. The cazette repair slurry has a solids content of 15% to 25% and a particle size of less than 5 um and is used for immersing a waste cazette. In one embodiment, the cazette repair slurry comprises the following components in parts by mass: 50 parts to 60 parts matrix; 5 parts to 10 parts clay; 1 part to 1.5 parts adhesive; and water for the remaining parts. In one embodiment, the matrix has a particle size of 0.1 µm to 5 µm. In one embodiment, the clay has a particle size of less than 5 µm. In one embodiment, the matrix comprises mullite and the ground cazette material. In one embodiment, the adhesive is at least one of polyurethane and polyacrylamide. A method for preparing the cazette repair slurry of any of the preceding embodiments comprises the steps of: acquisition of a matrix, clay, and an adhesive; mixing the matrix, clay and adhesive to form a mixture; and stirring and diluting the mixture with water to obtain the cazette repair slurry. In one embodiment, the mixture is stirred and diluted with water at a stirring rate of 1000 1 / min to 1500 1 / min. In one embodiment, the cazette repair slurry has a viscosity of less than 350 cP. A cazette repair process includes the steps of: acquiring a scrap can and the can repair slurry of any of the preceding embodiments; scraping the surface of the waste can to remove a layer of easily peeling peel on the surface of the waste can; impregnation of the scrap can whose surface has been scraped with the can repair slurry to obtain a pre-repaired can; subjecting the pre-repaired cazette to an inverted positioning to remove the cazette repair slurry which may flow onto the surface of the pre-repaired cazette set implementation of a heat treatment on the pre-repaired cazette after its returned positioning. In one embodiment, impregnating the scrap canister whose surface has been scraped with the canister repair slurry comprises: subjecting the scrap can whose surface has been scraped to a stacking treatment by using an impregnation tank so that the scrap cans are stacked in the impregnation tank; injecting the cazette repair slurry into the impregnation tank and sealing and evacuating the impregnation tank; and the implementation of ultrasonic impregnation on the waste container after sealing and vacuuming. A cazette is repaired by the cazette repair method of any of the preceding embodiments. Compared with the related art, the present application has at least the following advantages. In the cauldron repair slurry of the present application, the matrix, the clay, the adhesive and the water are combined to prepare the cauldron repair slurry for immersing the waste cauldron, and the cauldron repair slurry has a solids content of 15% to 25%, which thus ensures the fluidity of the cauldron repair slurry and relatively well ensures the impregnation effect of the cauldron repair slurry on the entire waste cauldron. In addition, the cauldron repair slurry has a particle size of less than 5 μm, which ensures the permeability of the cauldron repair slurry into the cracks of the waste cauldron, and thus ensures that the cauldron repair slurry can permeate into the cracks of the waste cauldron to fill and smooth the cracks of the waste cauldron.In addition, the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and crushed cazette material and is combined with the clay, the adhesive, and the water to prepare the slurry for repairing the scrap cazette so that a high bonding strength of the cazette repair slurry on the surface of the scrap cazette after the heat treatment on the scrap cazette is achieved relatively stably, and the structural strength of the scrap cazette after the heat treatment. is amplified, that is, the repair effect of the scrap can is relatively well ensured. As a result, not only is the scrap can repaired so that the number of generated scrap cans is reduced, but also the use life of the repaired can is increased, thereby effectively improving the reuse rate of the scrap cans, prolonging the use life of the can, and reducing the preparation cost of the positive electrode material. Brief description of the drawings To more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments are briefly described below. It should be understood that the drawings only illustrate certain embodiments of the present application, and should not be understood as limiting the scope thereof. Persons having ordinary skill in the art can obtain other relevant drawings based on these drawings without creative work. [Fig.1] is a flowchart of a method for preparing a cazette repair slurry according to one embodiment of the present application; [Fig.2] is a flowchart of a method for repairing a cazette according to an embodiment of the present application; [Fig.3] shows a discarded can used 22 times; and [Fig.4] shows a repaired scrap can. DETAILED DESCRIPTION To facilitate understanding of the present application, a more complete description of the present application is presented below with reference to the drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are presented for a more detailed and complete understanding of the content disclosed in the present application. It should be noted that when a component is described as being "attached to" another component, it may be attached directly to the particular component or attached through an intervening component. When a component is described as being "connected to" another component, it may be connected directly to the particular component or connected through an intervening component. Terms used herein, such as "vertical," "horizontal," "left," and "right," are used for illustrative purposes only and do not imply that this is the only embodiment. Unless otherwise stated, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application relates. The terms used in the description of the present application are used only to describe embodiments and are not intended to limit the present application. The term "and / or" as used herein encompasses any or all combinations of one or more of the associated elements listed. The present invention provides a caulking repair slurry. The caulking repair slurry comprises a solid component and a liquid component, wherein the solid component comprises a matrix and clay and the liquid component comprises an adhesive and water. The matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and a ground caulking material. The caulking repair slurry has a solids content of 15% to 25% and a particle size of less than 5 μm and is used for immersing a waste caulking. In the foregoing caulking repair slurry, the matrix, clay, adhesive and water are combined to prepare the caulking repair slurry for immersing the scrap caulking, and the caulking repair slurry has a solids content of 15% to 25%, which thus ensures the fluidity of the caulking repair slurry and relatively well ensures the impregnation effect of the caulking repair slurry on the entire scrap caulking. In addition, the caulking repair slurry has a particle size of less than 5 μm, which ensures the permeability of the caulking repair slurry into the cracks of the scrap caulking, and thus ensures that the caulking repair slurry can permeate into the cracks of the scrap caulking to fill and smooth the cracks of the scrap caulking.In addition, the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and crushed cazette material and is combined with the clay, the adhesive, and the water to prepare the slurry for repairing the scrap cazette, so that a high bonding strength of the cazette repair slurry on the surface of the scrap cazette after the heat treatment on the scrap cazette is relatively stably achieved, and the structural strength of the scrap cazette after the heat treatment is enhanced, that is, the repair effect of the scrap cazette is relatively well ensured.As a result, not only is the scrap can repaired so that the number of generated scrap cans is reduced, but also the use life of the repaired can is increased, thereby effectively improving the reuse rate of the scrap cans, prolonging the use life of the can, and reducing the preparation cost of the positive electrode material. In one embodiment, the ground cazette material is a powder obtained by further grinding the cazette powder scraped from the surface of the waste cazette. It is to be understood that the ground cazette material is a substance which has been subjected to heat treatment, and has relatively low hardness and stability, as well as the same nature as the scrap can, which can be attached to and fill the cracks of the scrap can relatively stably, which further ensures the repair effect of the scrap can. In one embodiment, the matrix comprises the crushed cazette material and the mullite. It should be understood that the crushed cazette material and the mullite are both stable, the mullite has a relatively high structural strength, and the crushed cazette material has the same nature as the waste cazette, so that the crushed cazette material and the mullite are used together as a matrix and combined with the clay and the adhesive to form the cazette repair slurry and repair the waste cazette, thereby ensuring the stability with which the cazette repair slurry is attached to and fills the cracks of the waste cazette, effectively improving the reuse rate of the waste cazette, ensuring that the repaired waste cazette has a relatively high structural strength, and further extending the service life of the repaired waste cazette. In one embodiment, the mass ratio of the ground cazette material to the mullite is 1 / (1.5 to 3). It is to be understood that the mass ratio of the ground cazette material to the mullite is 1 / (1.5 to 3), so that, in the case where the stability with which the cazette repair slurry is attached to and fills the waste cazette is ensured, the structural strength of the repaired waste cazette is effectively amplified and the service life of the waste cazette is relatively well extended. In one embodiment, before the can powder is scraped from the surface of the waste can, the surface of the waste can is air-cleaned to remove the positive electrode material on the surface of the waste can. In one embodiment, after the cazette powder is scraped from the surface of the waste cazette, the cazette powder is air cleaned to remove the positive electrode material on the surface of the cazette powder. In one embodiment, the waste can is a can having a rough and scratched surface. In one embodiment, the caulking repair slurry comprises the following components in parts by mass: 50 parts to 60 parts of matrix, 5 parts to 10 parts of clay, 1 part to 1.5 parts of adhesive, and water for the remaining parts, which ensures that the caulking repair slurry has relatively good fluidity and can easily enter the cracks of the scrap caulking, and relatively well ensures the stability with which the caulking repair slurry is attached to and fills the cracks of the scrap caulking. Thus, the scrap caulking can achieve a relatively good repair effect, and the repaired scrap caulking has a re- relatively high structural strength, which extends the useful life of the repaired scrap can relatively well. In one embodiment, the matrix has a particle size of 0.1 µm to 5 µm, which relatively well ensures that the matrix in the cazette repair slurry can relatively well be attached to and fill the cracks of the scrap cazette, and ensures the repair effect of the scrap cazette. In one embodiment, the clay has a particle size of less than 5 μm, which relatively well ensures that the clay in the cauldron repair slurry can relatively well be attached to and fill the cracks of the scrap cauldron, and ensures the repair effect of the scrap cauldron. In one embodiment, the adhesive is at least one of polyurethane and polyacrylamide, which relatively well ensures the adhesion strength of the cazette repair slurry to the cracks and the surface of the scrap cazette, and ensures the repair effect of the scrap cazette. The present application also provides a method for preparing the cazette repair slurry of any of the preceding embodiments. For a better understanding of the method for preparing the cazette repair slurry of the present application, the method for preparing the cazette repair slurry of the present application is further explained and illustrated below. The method for preparing the cazette repair slurry in one embodiment comprises all or part of the steps described below. In S100, a matrix, clay, and an adhesive are acquired. It should be understood that the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and a ground cazette material; the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and a ground cazette material and is combined with the clay, the adhesive, and water to prepare the slurry for repairing the scrap cazette, so that the high bonding strength of the cazette repair slurry on the surface of the scrap cazette after the heat treatment on the scrap cazette is achieved relatively stably, and the structural strength of the scrap cazette after the heat treatment can be amplified, that is, the repair effect of the scrap cazette can be relatively well ensured.Therefore, the matrix, clay and adhesive are acquired to prepare the cazette repair slurry for immersion and repair of the scrap cazette, so as to repair the scrap cazette. In S200, the matrix, clay and adhesive are mixed to form a mixture. It should be understood that clay, i.e., a sticky soil, is a sticky soil including a small amount of sand, and clay has relatively good plasticity since it is difficult for water to pass through it; and the adhesive is a substance having a relatively good bonding performance and connects objects by bonding their surfaces through adhesion and cohesion. If the matrix, clay, and adhesive are directly diluted and mixed in water, the clay, matrix, and adhesive will be mixed with relatively poor uniformity even at a relatively high stirring speed. Thus, to prepare the slurry, the matrix, clay, and adhesive are first mixed so that the matrix, clay, and adhesive are uniformly mixed and dispersed by physical kneading or stirring and mixing, thereby facilitating the uniform dispersion of the matrix, clay, and adhesive in the cazette repair slurry. In S300, the mixture is stirred and diluted with water to obtain the cazette repair slurry. It should be understood that the mixture is stirred and diluted with water after the matrix, clay and adhesive are uniformly mixed, which facilitates the uniform dispersion of the matrix, clay and adhesive in the water, prepares the cazette repair slurry having relatively good dispersion uniformity relatively well, and ensures the repair effect of the cazette repair slurry on the waste cazette. In the above method for preparing the cazette repair slurry, the matrix, the clay and the adhesive are acquired to prepare the cazette repair slurry for immersing and repairing the waste cazette, so that a relatively good repair effect of the waste cazette is obtained; the matrix, the clay and the adhesive are firstly mixed to prepare the slurry so that the matrix, the clay and the adhesive are uniformly mixed and dispersed by physical kneading or stirring and mixing; and then the mixture is stirred and diluted with water, which facilitates the uniform dispersion of the matrix, the clay and the adhesive in the water, relatively well prepares the cazette repair slurry having a relatively good dispersion uniformity, and ensures the repair effect of the cazette repair slurry on the waste cazette. In one embodiment, the mixture is stirred and diluted with water, which specifically includes that the mixture is stirred and diluted multiple times with small amounts of water, i.e., the mixture is stirred and diluted in the manner of kneading a dough. It should be understood that, water hardly passes through the clay, if a relatively large amount of water is added at one time, the local clay is wetted by the water, and it is difficult for the matrix, the clay eV / or the adhesive coated with the local clay to be in contact with the water and form a uniform slurry. As a result, it is difficult for the matrix, the clay and the adhesive to form a fine slurry in water having relatively good uniformity and improve their effect of repairing the waste container. Therefore, in the present application, the mixture is stirred and diluted multiple times with small amounts of water. The mixture is stirred and diluted in a manner similar to "dough kneading", that is, water is added to the mixture in portions and the mixture is stirred and mixed in a manner similar to "dough kneading", so that the mixture is gradually wetted and mixed evenly, which relatively well ensures the uniformity of dispersion of the mixture in the water, ensures the finish of the cazette repair slurry, and achieves a relatively good repair effect of the cazette repair slurry on the waste cazette. In one embodiment, the mixture is stirred and diluted multiple times with small amounts of water, specifically encompassing the following steps: a water addition amount is acquired; the mixture is added with 10% to 15% water and diluted for the first time; the once stirred and diluted mixture is added with 20% to 25% water and stirred and diluted for the second time; the twice stirred and diluted mixture is added with 40% to 60% water and stirred and diluted for the third time; and the three times stirred and diluted mixture is added with the remaining water and stirred and diluted for the fourth time.It should be understood that although the clay, adhesive, and matrix in the mixture are already mixed relatively uniformly before water is added to the mixture for the first time, there is a relatively large amount of unwetted local clay, and if too much water is added, the local clay is wetted immediately, which affects the internal permeation of the wetted clay by the water phase and affects the dispersion uniformity of the cazette repair slurry. Therefore, when water is first added, only a small amount of water needs to be added to wet and disperse the mixture, that is, only 10% to 15% of the water is added to wet and disperse the mixture, which relatively well ensures the dispersion uniformity of the mixture in the water. In addition, before water is added to the mixture again, there is still a relatively large amount of unwetted clay that is evenly distributed in the mixture.If all the water or relatively much water is added from the mixture, the local clay will always be wetted immediately, which affects the internal permeation of the wetted clay by a water phase and affects the dispersion uniformity of the cazette repair slurry. In other words, the amount of water to be added must always be controlled. Considering the preparation efficiency of the cazette repair slurry, when water is added to the mixture again, only 20% to 25% of the water is added, which ensures the dispersion uniformity of the cazette repair slurry and the preparation efficiency of the cazette repair slurry.Similarly, to further ensure the dispersion uniformity and preparation efficiency of the cazette repair slurry, the remaining water is controlled to be added in two portions, namely 40% to 60% of the water and the remaining water, which relatively well ensures the preparation efficiency of the cazette repair slurry and the repair effect of the cazette repair slurry. cazette repair on the scrap cazette. In one embodiment, the mixture is stirred and diluted with water at a stirring speed of 1000 rpm to 1500 rpm. It should be understood that the stirring speed is related to the mixing effect of the mixture. If the stirring speed is relatively low, it is relatively difficult for the mixture to be uniformly wetted with water and form a uniform slurry, and the preparation efficiency of the cazette repair slurry is reduced. If the stirring speed is too high, the matrix and clay having relatively small particle sizes float as dust, causing dust pollution, affecting the ratio of substances in the cazette repair slurry, and consequently affecting the repair effect of the cazette repair slurry on the waste cazette. In one embodiment, the mixture is stirred and diluted with water for a stirring time of 1 h to 2 h. It should be understood that, in the case where the stirring speed is 1000 rpm to 1500 rpm, the mixture is stirred and diluted with water for a stirring time of 1 h to 2 h, which relatively well ensures the dispersion uniformity of the cazette repair slurry. In one embodiment, the cazette repair slurry has a viscosity of less than 350 cP, which relatively well ensures the fluidity of the cazette repair slurry, the strength with which the cazette repair slurry fills and is attached in the cracks of the scrap cazette, and the strength with which the cazette repair slurry is attached to the surface of the scrap cazette, and then relatively well ensures the repair effect of the cazette repair slurry on the scrap cazette. Furthermore, in the present application, the viscosity is determined by using a Brookfield rotational viscometer. In one embodiment, the cazette repair slurry has a viscosity of 150 cP to 250 cP, which better ensures the fluidity of the cazette repair slurry, the strength with which the cazette repair slurry fills and is attached in the cracks of the waste cazette, and the strength with which the cazette repair slurry is attached to the surface of the waste cazette, and then better ensures the repair effect of the cazette repair slurry on the waste cazette. The present application also provides a cazette repair method. For a better understanding of the cazette repair method of the present application, the cazette repair method of the present application is further explained and illustrated below. The cazette repair method in one embodiment comprises all or part of the steps described below. In S10, a scrap can and the can repair slurry of any of the preceding embodiments are acquired. It should be understood that, although that the cazette repair slurry has a relatively good repair effect on the scrap cazette, if the cazette repair slurry is used by an improper method or the cazette repair slurry is used by different methods, the scrap cazette is repaired with a different strength effect. Therefore, in the present application, to maximize the repair effect of the cazette repair slurry on the scrap cazette, the scrap cazette and the cazette repair slurry are acquired for subsequent operations. In S20, a surface of the scrap can is scraped to remove an easily peeling peeling layer on the surface of the scrap can. It should be understood that a residue of a positive electrode material exists on the surface of the scrap can, and the scrap can itself has relatively many cracks and an easily peeling surface layer; if the scrap can is repaired directly, no matter what method is adopted to repair the scrap can, the repair effect of the scrap can is affected and thus the can repair slurry has a relatively poor repair effect on the scrap can. Therefore, the surface of the waste can is scraped to remove the easily peeling peeling layer on the surface of the waste can, which relatively well ensures the repair effect of the can repair slurry on the waste can. In S30, the scrap can with the scraped surface is impregnated with the can repair slurry to obtain a pre-repaired can. It should be understood that generally the scrap can is mainly repaired by being directly coated, and when the scrap can is repaired by being coated, the fluidity of the can repair slurry should be controlled, that is, the fluidity of the can repair slurry should be reduced, in order to ensure the adhesion of the can repair slurry to the surface of the scrap can; in this way, the can repair slurry is more likely to be directly attached to the surface of the scrap can, that is, the can repair slurry hardly permeates into the cracks of the scrap can;thus, when the scrap can is repaired by being coated, the surface of the scrap can must be polished to a relatively large extent, and the can must be coated with the can repair slurry multiple times to ensure the thickness and overall strength of the scrap can, which requires a relatively large amount of labor; furthermore, if the cracks of the scrap can are relatively deep and are not eliminated when the scrap can is polished, since the can repair slurry hardly permeates into the cracks of the scrap can, the cracks of the scrap can still exist and the scrap can will be scrapped again relatively quickly when the scrap can; is used again, that is, the repair effect is relatively poor and the service life of the repaired cazette is relatively short. Therefore, in the present application, the cazette repair slurry having relatively good fluidity is used, and the waste cazette is repaired by being impregnated with the cazette repair slurry. On the one hand, the degree to which the surface of the waste cazette is polished is reduced, so that the overall thickness and strength of the waste cazette can be ensured by simply forming a repair layer having a relatively small thickness on the surface of the waste cazette.On the other hand, even when the surface of the scrap can is polished to a relatively small degree and there are still relatively many cracks on the surface of the scrap can, the can repair slurry can permeate into the cracks of the scrap can relatively well and be attached in and fill the cracks of the scrap can relatively well, so that even when the scrap can is polished to a relatively small degree, the repair effect of the scrap can is improved relatively well and the service life of the repaired scrap can is ensured relatively well. In S40, the pre-repaired can is subjected to inverted positioning to remove can repair slurry which may flow onto a surface of the pre-repaired can. It should be understood that after the waste can is impregnated by the can repair slurry, there remains a lot of can repair slurry attached to the surface of the waste can in a fluid manner when the waste can is taken, and if the waste can is directly subjected to heat treatment after being taken, many flow lines appear on the surface of the waste can, which affects the use of the waste can.Therefore, in the present application, the pre-repaired can is subjected to inverted positioning to remove can repair slurry that may flow onto the surface of the pre-repaired can, which relatively well ensures the surface flatness of the scrap can during heat treatment. It should also be understood that if the taken scrap can is placed with its upper side upward to remove can repair slurry that may flow onto the surface of the pre-repaired can, relatively much can repair slurry accumulates in the scrap can, and the internal flatness of the scrap can after heat treatment is relatively poor, which affects the use of the scrap can. In S50, heat treatment is performed on the pre-repaired can after it is placed in the upside-down position, so that the scrap can is relatively well repaired. In the previous cazette repair process, the waste cazette and the cazette repair slurry are acquired to maximize the repair effect of the cazette repair slurry on the scrap cazette in the subsequent processing. Then, the cazette repair slurry having a relatively large fluidity is used, and the scrap cazette is repaired by being impregnated with the cazette repair slurry. On the one hand, the degree to which the surface of the scrap cazette is polished is reduced, so that the overall thickness and strength of the scrap cazette can be ensured by simply forming a repair layer having a relatively small thickness on the surface of the scrap cazette.On the other hand, even when the surface of the scrap can is polished to a relatively small degree and there are still relatively many cracks on the surface of the scrap can, the can repair slurry can permeate into the cracks of the scrap can relatively well and be attached in and fill the cracks of the scrap can relatively well, so that even when the scrap can is polished to a relatively small degree, the repair effect of the scrap can is improved relatively well and the service life of the repaired scrap can is ensured relatively well. In addition, the pre-repaired can is subjected to inverted positioning to remove the can repair slurry which may flow onto the surface of the pre-repaired can, which relatively well ensures the surface flatness of the scrap can during heat treatment and the repair effect of the scrap can. In one embodiment, before the step of scraping the surface of the waste can and after the step of acquiring the waste can and the can repair slurry of any of the preceding embodiments, the can repair method further comprises the following step: the surface of the waste can is cleaned to remove the positive electrode material on the surface of the waste can. In one embodiment, the surface of the waste can is cleaned, specifically including the waste can being air cleaned and water washed separately. In one embodiment, the waste can with the scratched surface is impregnated with the can repair slurry, which specifically includes the following steps: the waste can with the scratched surface is subjected to stacking treatment by using an impregnation tank so that the waste cans are stacked in the impregnation tank; the can repair slurry is injected into the impregnation tank and the impregnation tank is sealed and evacuated; and ultrasonic impregnation is performed on the waste can after the sealing and evacuation. In this way, sufficient impregnation of the waste cans is achieved relatively well, i.e., it is relatively well ensured that the can repair slurry is attached in and fill the cracks of the scrap can sufficiently, and then the repair effect of the scrap can is relatively well ensured. In one embodiment, the waste cans are stacked in the impregnation tank in 8 to 12 layers, which ensures the impregnation effect of the waste cans relatively well. In one embodiment, the waste cans are stacked in the impregnation tank in a non-inverted manner. It should be understood that if the waste cans are stacked in the impregnation tank in an inverted manner, the waste cans are quickly submerged when the can repair slurry is poured into the impregnation tank at a relatively high speed; thus, there are large air bubbles in the waste cans due to the presence of air inside the waste cans; and it is relatively difficult to ensure the effective removal of these air bubbles by sealing and vacuuming, which relatively greatly affects the impregnation effect of the waste cans, i.e., relatively greatly affects the repair effect of the waste can.Therefore, in the present application, the waste cans are stacked in the impregnation tank in a non-turned manner so that the generation of such air bubbles is reduced relatively well and the repair effect of the waste can is ensured relatively well. In one embodiment, after the caulking repair slurry is injected into the impregnation tank, the level of the caulking repair slurry is at least 15 cm higher than the upper waste caulking, which relatively well ensures the impregnation effect of the waste caulking. In one embodiment, after the impregnation tank is sealed and evacuated, the impregnation tank has a pressure of 0.3 atm to 0.7 atm, which relatively well ensures the impregnation effect of the waste cans. In one embodiment, ultrasonic impregnation is performed on the waste cans after sealing and evacuating for an impregnation time of 20 min to 30 min, which relatively well ensures the impregnation effect of the waste cans. In one embodiment, ultrasonic impregnation is performed on the waste cans after sealing and vacuuming at an impregnation temperature of 45°C to 60°C, which ensures the impregnation effect of the waste cans relatively well. In one embodiment, ultrasonic impregnation is performed on the waste cans after sealing and vacuuming at an ultrasonic frequency of 20 kHz to 45 kHz, which ensures the impregnation effect of the waste cans relatively well. In one embodiment, the heat treatment is performed on the pre- repaired after the returned positioning, and specifically includes the following steps: the pre-repaired cazette after the returned positioning is dried; and the pre-repaired cazette after drying is thermally baked, which ensures the repair effect of the waste cazette relatively well. In one embodiment, the pre-repaired canister after the returned positioning is dried at a temperature of 25°C to 50°C, which relatively well ensures the repair effect of the waste canister. In one embodiment, the pre-repaired canister after the inverted positioning is dried for 6 h to 9 h, which relatively well ensures the repair effect of the waste canister. In one embodiment, the pre-repaired canister after drying is thermally baked at a temperature of 200°C to 700°C, which relatively well ensures the repair effect of the waste canister. In one embodiment, the pre-repaired canister after drying is thermally baked for 15 min to 30 min, which relatively well ensures the repair effect of the waste canister. The present application also provides a cazette repaired by the cazette repair method of any of the preceding embodiments. Compared with the related art, the present application has at least the following advantages. In the cauldron repair slurry of the present application, the matrix, the clay, the adhesive and the water are combined to prepare the cauldron repair slurry for immersing the waste cauldron, and the cauldron repair slurry has a solids content of 15% to 25%, which thus ensures the fluidity of the cauldron repair slurry and relatively well ensures the impregnation effect of the cauldron repair slurry on the entire waste cauldron. In addition, the cauldron repair slurry has a particle size of less than 5 μm, which ensures the permeability of the cauldron repair slurry into the cracks of the waste cauldron, and thus ensures that the cauldron repair slurry can permeate into the cracks of the waste cauldron to fill and smooth the cracks of the waste cauldron.In addition, the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and crushed cazette material and is combined with the clay, the adhesive, and the water to prepare the slurry for repairing the scrap cazette so that a high bonding strength of the cazette repair slurry on the surface of the scrap cazette after the heat treatment on the scrap cazette is relatively stably obtained, and the structural strength of the scrap cazette after the heat treatment is enhanced, that is, the repair effect of the scrap cazette is relatively well ensured. As a result, not only is the scrap cazette repaired . so that the number of scrap cans generated is reduced, but also the use life of the repaired can is increased, thus effectively improving the reuse rate of scrap cans, prolonging the use life of the can, and reducing the preparation cost of the positive electrode material. Some specific examples are presented below. The "%" figures represent percentages by weight. It should be noted that not all possible cases are explored in detail in the following examples, and the materials used in the following examples are commercially available unless otherwise stated. Example 1 We prepare a repair porridge. 50 kg of a matrix, 5 kg of clay, and | kg of polyurethane are procured. The matrix is ​​a powder formed by mixing mullite and cazette powder (where the mass ratio of cazette powder to mullite is 1:1.5) generated when the surface layer of a reusable cazette has been polished, the particle size of the matrix is ​​D50 = 0.50 um, and the particle size of the clay is less than 4.5 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 2 h at a stirring speed of 1000 rpm, where the amount of water added is 10%, 20%, 60%, and the rest water, and stirring is stopped when the viscosity of the slurry formed is 315 cP, where the solids content of the slurry is 15%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 12 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 1 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.7 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 20 min at 60°C. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 9 h at 25°C and subjected to heat treatment for 30 min at 250°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (the surface of which is similar to the repaired scrap can shown in [Fig. 4]) is reused 13 times before being discarded. Example 2 We prepare a repair porridge. 55 kg of a matrix, 8 kg of clay, and 1.2 kg of polyurethane are obtained. The matrix is ​​a powder formed by mixing mullite and cazette powder (where the mass ratio of cazette powder to mullite is 1 / 2) generated when the surface layer of a reusable cazette has been polished, the particle size of the matrix is ​​D50 = 0.57 um, and the particle size of the clay is less than 3 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 1.5 h at a stirring speed of 1300 rpm, where the amount of water added is 12%, 22%, 45%, and the rest water, and stirring is stopped when the viscosity of the slurry formed is 250 cP, where the solids content of the slurry is 20%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 10 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 0.9 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.5 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 25 min at 50°C. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 50°C and subjected to heat treatment for 20 min at 320°C. The object treated in this example is a 22-times used can (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in the [Fig.3]). The treated can (which has a surface similar to that of the repaired waste can shown in [Fig.4]) is reused 15 times before being discarded. Example 3 We prepare a repair porridge. 60 kg of a matrix, 10 kg of clay, and 1.5 kg of polyurethane are procured. The matrix is ​​a powder formed by mixing mullite and cazette powder (where the mass ratio of cazette powder to mullite is 1 / 3) generated when the surface layer of a reusable cazette has been polished, the particle size of the matrix is ​​D50 = 0.75 um, and the particle size of the clay is less than 1.2 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 1 h at a stirring speed of 1500 rpm, where the amount of water added is 15%, 25%, 40%, and the remainder water, and stirring is stopped when the viscosity of the slurry formed is 150 cP, where the solids content of the slurry is 25%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 8 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 0.75 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.3 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 30 min at 45°C. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 6 h at 60°C and subjected to heat treatment for 15 min at 650°C. The object processed in this example is a 22-times-used can (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (whose surface is similar to that of the repaired scrap can shown in [Fig. 4]) is reused 12 times before being discarded. Example 4 We prepare a repair porridge. 55 kg of matrix, 8 kg of clay, and 1.2 kg of polyurethane are obtained. The matrix is ​​mullite, the matrix grain size is D50 = 0.57 um, and the clay grain size is less than 3 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 1.5 h at a stirring speed of 1300 rpm, where the amount of water added is 12%, 22%, 45%, and the rest water, and stirring is stopped when the viscosity of the slurry formed is 250 cP, where the solids content of the slurry is 20%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 10 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 0.9 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.5 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 25 min at 50°C. After the impregnation is completed, the slurry is pumped out, the can is taken out and turned upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 50°C and subjected to heat treatment for 20 min at 320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (the surface of which is similar to the repaired scrap can shown in [Fig. 4]) is reused 10 times before being discarded. Example 5 We prepare a repair porridge. We obtain 50 kg of a matrix, 5 kg of clay, and | kg of polyurethane. The matrix is ​​aluminum oxide, the matrix grain size is D50 = 0.57 um, and the grain size Nucleometry of clay is less than 5 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred at a stirring speed of 1500 rpm, where the amount of water added is 12%, 22%, 40%, and the remainder water, and stirring is stopped when the viscosity of the slurry formed is less than 350 cP (tested by a Brookfield rotary viscometer, 315 cP), where the solids content of the slurry is 15%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 12 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 1.2 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.3 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 20 min. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 45°C and subjected to heat treatment for 15 min at 300-320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (the surface of which is similar to the repaired scrap can shown in [Fig. 4]) is reused 9 times before being discarded. Example 6 We prepare a repair porridge. 50 kg of matrix, 5 kg of clay, and 1 kg of polyurethane are obtained. The matrix is ​​cordierite, the matrix grain size is D50 = 0.57 um, and the clay grain size is less than 5 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred at a stirring speed of 1500 rpm, where the amount of water added is 12%, 22%, 40%, and the remaining water, and stirring is stopped when the viscosity of the slurry formed is less than 350 cP (tested by a Brookfield rotary viscometer, 315 cP), where the solids content of the slurry is 15%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 12 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 1.2 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.3 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 20 min. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 45°C and subjected to heat treatment for 15 min at 300-320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (the surface of which is similar to the repaired scrap can shown in [Fig. 4]) is reused 9 times before being discarded. Example 7 We prepare a repair porridge. 50 kg of matrix, 5 kg of clay, and 1 kg of polyurethane are obtained. The matrix is ​​a mixture of mullite and spinel (where the weight ratio of spinel to mullite is 1 / 2), the matrix grain size is D50 = 0.57 μm, and the clay grain size is less than 5 μm. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred at a stirring speed of 1500 rpm, where the amount of water added is 12%, 22%, 40%, and the remainder water, and stirring is stopped when the viscosity of the slurry formed is less than 350 cP (tested by a Brookfield rotary viscometer, 315 cP), where the solids content of the slurry is 15%. We repair a junk tin. The waste can is prepared, a part of an easily detachable peeling layer on the surface of the can to be treated is scraped off with a scraper, and the can (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 12 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 1.2 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.3 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 20 min. After the impregnation is completed, the slurry is pumped out, the can is taken out and placed upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 45°C and subjected to heat treatment for 15 min at 300-320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). The processed can (the surface of which is similar to the repaired scrap can shown in [Fig. 4]) is reused 10 times before being discarded. Comparative Example 1 We prepare a repair porridge. 55 kg of a matrix, 8 kg of clay, and 1.2 kg of polyurethane are obtained. The matrix is ​​a powder formed by mixing mullite and cazette powder (where the mass ratio of cazette powder to mullite is 1 / 2) generated when the surface layer of a reusable cazette has been polished, the particle size of the matrix is ​​D50 = 0.57 um, and the particle size of the clay is less than 3 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 1.5 h at a stirring speed of 1300 rpm, where the amount of water added is 12%, 22%, 45%, and the rest water, and stirring is stopped when the viscosity of the slurry formed is 250 cP, where the solids content of the slurry is 20%. We repair a junk tin. The waste can is prepared, and a part of a layer of peel that easily comes off the surface of the can is scraped off with a scraper. to be treated, and the cazette (height: 70 mm) is placed with its upper side upwards and stacked in an impregnation tank, where 12 layers are stacked. The slurry is injected into the impregnation tank along its wall to reduce the generation of air bubbles, where the slurry injection height is 1.2 m. After the slurry injection height is reached, the slurry injection is stopped, the impregnation tank protection plate is closed and locked so that the impregnation tank is in a sealed state, the impregnation tank is put under a vacuum of 0.3 standard atmospheric pressure through an air suction hole provided on the impregnation tank protection plate to improve the slurry permeability, and ultrasonic impregnation is carried out for 20 min. After the impregnation is completed, the slurry is pumped out, the can is taken out and turned upside down to remove excess slurry from the surface; and the can is dried in hot air for 7 h at 45°C and subjected to heat treatment for 15 min at a temperature of 300 to 320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig. 3]). During heat treatment, cracks appear on the surface of the can, and the treated can is reused only once and then cracks and is discarded. Comparative example 2 We prepare a repair porridge. 55 kg of a matrix, 8 kg of clay, and 1.2 kg of polyurethane are obtained. The matrix is ​​a powder formed by mixing mullite and cazette powder (where the mass ratio of cazette powder to mullite is 1 / 2) generated when the surface layer of a reusable cazette has been polished, the particle size of the matrix is ​​D50 = 0.57 um, and the particle size of the clay is less than 3 um. The matrix, clay and polyurethane are mixed to form a mixture. Water is added to the mixture in four portions and the mixture is stirred for 1.5 h at a stirring speed of 1300 rpm, where the amount of water added is 12%, 22%, 45%, and the rest water, and stirring is stopped when the viscosity of the slurry formed is 250 cP, where the solids content of the slurry is 20%. We repair a junk tin. The waste can is prepared, a part of a layer of easily detachable peel on the surface of the can to be treated is scraped off with a scraper, the surface of the can is automatically coated with the slurry in Using an automatic coating device, the coating is stopped after coating the can 7 times, and the can is dried with hot air for 7 h at 45°C and subjected to heat treatment for 15 min at 300-320°C. The object processed in this example is a can used 22 times (the can being used to produce a ternary positive electrode material and the surface of the can being damaged to a similar extent as the scrap can shown in [Fig.3]). During heat treatment, small cracks appear and the processed can cracks and is reused only 5 times and then cracks and is scrapped. In addition, the automatic coating device is not equipment in the positive electrode material production workshop, and must be purchased and debugged additionally, which increases costs. The foregoing embodiments constitute only several embodiments of the present application, and their specific and detailed description cannot be construed as limiting the scope of the present application. It should be noted that persons having ordinary skill in the art can make a number of variations and improvements without departing from the concept of the present application, and these variations and improvements fall within the scope of the present application. Accordingly, the scope of the present application is defined by the appended claims. List of process steps illustrated in the figures: [Fig.1]: S100: Acquisition of a matrix, clay and an adhesive S200: Mixing the matrix, clay and adhesive to obtain a mixture S300: Stirring and diluting the mixture with water to obtain a cazette repair slurry [Fig.2]: S100: Acquiring a scrap can and the can repair slurry of any one of the preceding embodiments S200: Scraping a surface of the waste can to remove an easily peeling layer of peeling material on the surface of the waste can S300: Impregnation of the scrap can whose surface has been scraped with the can repair slurry to obtain a pre-repaired can S400: Subjecting the pre-repaired cazette to inverted positioning to remove cazette repair slurry that may flow onto the surface of the pre-repaired cazette S500: Implementation of heat treatment on the pre-repaired cazette after its returned positioning.

Claims

Claims

1. A cazctte repair broth comprising a solid component and a liquid component, wherein the solid component comprises a matrix and clay and the liquid component includes an adhesive and water; wherein the matrix is ​​at least one of aluminum oxide, mullite, cordierite, spinel, and crushed cazette material; the cazette repair porridge having a dry extract content of 15% to 25% and a particle size of less than 5 um and being used for the immersion of a waste container.

2. A cazette repair slurry according to claim 1, comprising the following components in parts by mass: 50 parts to 60 parts matrix; 5 parts to 10 parts clay; 1 part to 1.5 parts adhesive; and water for the remaining parts.

3. A cazette repair paste according to claim 1, wherein the matrix has a particle size of 0.1 um to 5 um.

4. A cazette repair slurry according to claim 1, wherein the matrix comprises mullite and the ground cazette material.

5. The cazette repair slurry of claim 1, wherein the adhesive is at least one of polyurethane and polyacrylamide.

6. A method for preparing the cazette repair slurry according to one of any of claims | to 5, comprising the steps of: acquisition of a matrix, clay, and an adhesive; mixing the matrix, clay and adhesive to obtain a mixture; and stirring and diluting the mixture with water to obtain the cazette repair porridge.

7. A method according to claim 6, wherein the mixture is stirred and diluted with water at a stirring speed of 1000 rpm to 1500 rpm; and / or the cazette repair slurry has a viscosity of less than 350 cP.

8. A method of cazette repair, comprising the steps of: acquisition of a scrap can and repair porridge cazette according to any one of claims 1 to 5; scraping the surface of the waste container to remove a layer of easily peeling coat on the surface of the waste container; impregnation of the waste container whose surface has been scraped with the cazette repair porridge to obtain a pre-repaired cazette; submission of the pre-repaired cazette to a returned positioning for remove the cazette repair slurry that may drip onto the pre-repaired cazette surface; and implementation of heat treatment on the pre-repaired cazette after its returned positioning.

9. A method of repairing a cazette according to claim 8, wherein the impregnation of the waste container whose surface has been scraped with the Cazette repair porridge includes: the submission of the scrap can whose surface has been scraped to a stacking treatment using an impregnation tank way that the waste cans are stacked in the tank of impregnation; injecting the cazette repair slurry into the tank impregnation and sealing and vacuuming of the tank of impregnation; and the implementation of ultrasonic impregnation on the waste container after sealing and vacuuming,

10. Cazette repaired by the cazette repair method according to claim- indication 8 or $Y.

Images