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CN118326159A - Treatment method of aluminum slag generated by recycling full-chain integrated battery and application of treatment method - Google Patents

Treatment method of aluminum slag generated by recycling full-chain integrated battery and application of treatment method Download PDF

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Publication number
CN118326159A
CN118326159A CN202410457326.0A CN202410457326A CN118326159A CN 118326159 A CN118326159 A CN 118326159A CN 202410457326 A CN202410457326 A CN 202410457326A CN 118326159 A CN118326159 A CN 118326159A
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Prior art keywords
lithium
aluminum
slag
low
aluminum slag
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CN202410457326.0A
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Chinese (zh)
Inventor
陈怀兴
阮丁山
周游
李强
李长东
宁培超
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Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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Hunan Brunp Recycling Technology Co Ltd
Guangdong Brunp Recycling Technology Co Ltd
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Application filed by Hunan Brunp Recycling Technology Co Ltd, Guangdong Brunp Recycling Technology Co Ltd filed Critical Hunan Brunp Recycling Technology Co Ltd
Priority to CN202410457326.0A priority Critical patent/CN118326159A/en
Publication of CN118326159A publication Critical patent/CN118326159A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001—Dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/0084—Obtaining aluminium melting and handling molten aluminium
    • C22B21/0092—Remelting scrap, skimmings or any secondary source aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/064—Obtaining aluminium refining using inert or reactive gases
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/10—Obtaining alkali metals
    • C22B26/12—Obtaining lithium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention provides a processing method of aluminum slag generated by recycling full-chain integrated batteries and application thereof, wherein the processing method comprises the following steps: (1) Pretreating aluminum slag, and then performing low-temperature vacuum distillation to obtain low-lithium aluminum slag and high-lithium condensate; (2) And carrying out high-temperature vacuum separation on the low-lithium aluminum slag, and carrying out slag skimming operation to obtain aluminum liquid and lithium-containing dross. The invention combines low-temperature vacuum distillation and high-temperature vacuum separation, and recovers high-quality lithium-containing condensate and aluminum liquid, thereby not only reducing recovery cost, but also reducing pain points of aluminum slag stockpiling of enterprises, reducing potential safety hazards in production, realizing recovery of valuable metal, particularly lithium resources, in aluminum slag generated by battery recovery, and solving the problems of difficult recovery and low recovery rate of lithium-containing aluminum foil in waste battery recovery industry. The treatment method has simple process and is easy to popularize and implement.

Description

Treatment method of aluminum slag generated by recycling full-chain integrated battery and application of treatment method
Technical Field
The invention belongs to the technical field of waste battery recovery, and particularly relates to a treatment method of aluminum slag generated by full-chain integrated battery recovery and application thereof.
Background
The aluminum foil is an important component in the battery, the aluminum foil accounts for more than 20 percent in the sodium ion battery, the aluminum slag stored at present is the aluminum foil remained after the battery positive plate is stripped from the plate powder, the aluminum slag belongs to valuable metals, the plate powder is also stained on most aluminum slag, the current aluminum slag treatment method is only to sell the aluminum slag outwards after stock accumulation, the self value of the aluminum slag is not realized far, and the aluminum slag accumulation is easy to have potential safety hazards, so that the tragic experience is caused for some new energy manufacturers, the aluminum slag generated by the recovery of the battery is used in other fields after being crushed into silver powder at present, the loss of lithium resources is caused, the value of the aluminum slag is not embodied far, related researches are also less, the aluminum slag is easy to ignore, and the value of the plate powder is mainly higher and is more focused. Therefore, a technology for treating aluminum slag generated by recovering batteries is still a subject to be studied.
The vacuum furnace has the characteristics and functions of high efficiency, environmental protection, uniform and stable heating, product purification and the like, and compared with normal pressure metallurgy, the vacuum metallurgy has the advantages of simple operation, simple equipment, capability of processing more complex materials needing to be oxidized, and suitability for recovering valuable metals in aluminum slag. CN115679116a discloses a method for preparing an Al-series intermediate alloy by extracting elemental aluminum from aluminum ash by using a vacuum furnace, which comprises the steps of extracting elemental aluminum from aluminum ash, refining aluminum liquid, alloying aluminum liquid and detecting cast ingots. However, the method aims at primary aluminum ash generated in the aluminum processing and aluminum liquid electrolysis process, the primary aluminum ash generates aluminum slag for aluminum electrolysis, the impurities are less, the aluminum content is high, and valuable metals are mainly aluminum. Therefore, the method is difficult to apply to the treatment of aluminum slag generated by battery recycling.
In view of the foregoing, there is a need for a process for treating aluminum slag generated during battery recycling to reduce industrial stacking.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for processing aluminum slag generated by recycling of a full-chain integrated battery and application thereof. The invention combines low-temperature vacuum distillation and high-temperature vacuum separation, and recovers high-quality lithium-containing condensate and aluminum liquid, thereby not only reducing recovery cost, but also reducing pain points of aluminum slag stockpiling of enterprises, reducing potential safety hazards in production, realizing recovery of valuable metal, particularly lithium resources, in aluminum slag generated by battery recovery, and solving the problems of difficult recovery and low recovery rate of lithium-containing aluminum foil in waste battery recovery industry.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in a first aspect, the invention provides a method for treating aluminum slag produced by recycling full-chain integrated batteries, comprising the following steps:
(1) Pretreating aluminum slag, and then performing low-temperature vacuum distillation to obtain low-lithium aluminum slag and high-lithium condensate;
(2) And carrying out high-temperature vacuum separation on the low-lithium aluminum slag, and carrying out slag skimming operation to obtain aluminum liquid and lithium-containing dross.
The invention combines low-temperature vacuum distillation and high-temperature vacuum separation, and recovers high-quality lithium-containing condensate and aluminum liquid, thereby not only reducing recovery cost, but also reducing pain points of aluminum slag stockpiling of enterprises, reducing potential safety hazards in production, realizing recovery of valuable metal, particularly lithium resources, in aluminum slag generated by battery recovery, and solving the problems of difficult recovery and low recovery rate of lithium-containing aluminum foil in waste battery recovery industry.
In the invention, the purpose of low-temperature vacuum distillation is to obtain high-quality high-lithium condensate, so that the phenomenon that high-melting-point LiAlO 2 is generated by the reaction of metal lithium and aluminum oxide and enters slag due to direct one-step high-temperature separation is avoided, and the recovery cost can be effectively reduced.
In the invention, the high-lithium condensate and the lithium-containing scum are recycled to the wet process to be separated into lithium salt, pyrolysis oil, iron phosphide slag and other substances, and the recycling can be realized.
The skimming operation refers to skimming the dross on the upper layer of the material under vacuum.
As a preferred embodiment of the present invention, the step of preprocessing in step (1) includes:
The aluminum slag is crushed to a mesh number less than or equal to 100 meshes, for example, 100 meshes, 80 meshes, 60 meshes, 50 meshes, 30 meshes or the like.
In the invention, the purpose of crushing the aluminum slag is to improve the recovery rate of the metallic lithium in the step (1).
In a preferred embodiment of the present invention, the vacuum degree of the low-temperature vacuum distillation in the step (1) is less than 10Pa, and may be, for example, 10 0Pa、10-1Pa、10-2 Pa or 10 -3 Pa.
In the invention, the low-temperature vacuum distillation is carried out under the condition that the vacuum degree is less than 10Pa, which is helpful for preventing the aluminum foil from oxidizing and reducing the volatilization temperature of lithium salt.
As a preferable embodiment of the present invention, the temperature of the low-temperature vacuum distillation in the step (1) is 400-900 ℃, for example, 400 ℃, 500 ℃, 600 ℃, 700 ℃, 800 ℃, 900 ℃ or the like, and the time is 0.5-3h, for example, 0.5h, 1h, 1.5h, 2h, 2.5h, 3h or the like.
In the invention, if the temperature of the low-temperature vacuum distillation is too low, the temperature of the saturated vapor pressure required by the lithium salt is not reached, so that the recovery rate of the metal lithium is low; if the temperature of the low-temperature vacuum distillation is too high, a large amount of metal lithium is combined with alumina, so that the recovery rate of the metal lithium is low, and the grade of the pure aluminum product is low.
In a preferred embodiment of the present invention, the high-temperature vacuum separation in step (2) is performed at a vacuum level of less than 10Pa, and may be, for example, 10 0Pa、10-1Pa、10-2 Pa or 10 -3 Pa.
In the invention, high-temperature vacuum separation is carried out under the condition that the vacuum degree is less than 10Pa, which is helpful for preventing the aluminum foil from oxidizing and improving the grade of pure aluminum products.
As a preferable technical scheme of the invention, the temperature of the high-temperature vacuum separation in the step (2) is 900-1300 ℃, for example, 900 ℃, 1000 ℃, 1100 ℃, 1200 ℃ or 1300 ℃ and the like, and the time is 0.5-3h, for example, 0.5h, 1h, 1.5h, 2h, 2.5h or 3h and the like.
In the invention, if the temperature of high-temperature vacuum separation is too low, the separation of low-lithium aluminum slag is incomplete, so that the grade of the pure aluminum product is lower; if the temperature of the high-temperature vacuum separation is too high, energy waste is caused.
Preferably, stirring is accompanied during the high temperature vacuum separation of step (2).
In the invention, the purpose of stirring is to cause the aluminum liquid to pool.
As a preferable technical scheme, the method comprises the steps of firstly, depletion and standing of a high-temperature vacuum separated product before the slag skimming operation in the step (2).
In the invention, the purpose of depletion and standing is to completely separate liquid from solid.
Preferably, the time for the depletion and standing is 0.5-1h, for example, 0.5h, 0.6h, 0.7h, 0.h h, 0.9h or 1h, etc.
In the invention, the depletion and standing time is 0.5-1h, so that the liquid-solid separation is more complete, and the grade of pure aluminum products is improved.
As a preferable technical scheme of the invention, the aluminum liquid in the step (2) is further subjected to post-treatment, and the post-treatment step comprises the following steps:
Refining the aluminum liquid to obtain pure aluminum liquid.
In the invention, the refining purpose is to improve the purity of the aluminum liquid and obtain a high-value pure aluminum product.
Preferably, the refining time is 5-30min, for example, 5min, 10min, 15min, 20min, 25min or 30min, etc.
Preferably, the refining mode is air blowing refining.
Preferably, in the process of blowing refining, the blown gas includes argon.
As a preferable technical scheme of the invention, the processing method comprises the following steps:
(1) Vacuum drying aluminum slag, crushing the aluminum slag until the mesh number is less than or equal to 100 meshes, then placing the obtained aluminum slag powder in vacuum equipment with the vacuum degree less than 10Pa, and carrying out low-temperature vacuum distillation at 400-900 ℃ for 0.5-3 hours to obtain low-lithium aluminum slag and high-lithium condensate, wherein lithium salt and pyrolysis oil are separated from the high-lithium condensate in a wet process;
(2) Under the stirring condition, carrying out high-temperature vacuum separation on the low-lithium aluminum slag at 900-1300 ℃ for 0.5-3h, carrying out depletion standing for 0.5-1h after the completion of the separation, and carrying out slag skimming operation after the solid-liquid separation is completed to obtain aluminum liquid and lithium-containing scum, wherein the lithium-containing scum is separated in a wet process to obtain lithium salt and ferric phosphide;
(3) And (3) carrying out air blowing refining on the aluminum liquid for 5-30min to obtain pure aluminum liquid.
In a second aspect, the present invention provides the use of a treatment process as described in the first aspect for the recovery of spent batteries.
The numerical ranges recited herein include not only the recited point values, but also any point values between the recited numerical ranges that are not recited, and are limited to, and for the sake of brevity, the invention is not intended to be exhaustive of the specific point values that the recited range includes.
Compared with the prior art, the invention has the following beneficial effects:
The invention combines low-temperature vacuum distillation and high-temperature vacuum separation, and recovers high-quality lithium-containing condensate and aluminum liquid, thereby not only reducing recovery cost, but also reducing pain points of aluminum slag stockpiling of enterprises, reducing potential safety hazards in production, realizing recovery of valuable metal, particularly lithium resources, in aluminum slag generated by battery recovery, and solving the problems of difficult recovery and low recovery rate of lithium-containing aluminum foil in waste battery recovery industry.
(2) The treatment method provided by the invention has simple process and is easy to popularize and implement.
Drawings
FIG. 1 is a flow chart of the aluminum dross treatment process in example 1 of the invention.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
In the following embodiments, the main components of aluminum slag produced by recycling waste batteries are shown in table 1.
TABLE 1
Example 1
The embodiment provides a method for processing aluminum slag generated by recycling full-chain integrated batteries, wherein a process flow chart of the method is shown in fig. 1, and the method comprises the following steps:
(1) Vacuum drying aluminum slag, crushing the aluminum slag until the mesh number is less than or equal to 100 meshes, then placing the obtained aluminum slag powder into a vacuum furnace with the vacuum degree of 5Pa, and carrying out low-temperature vacuum distillation at the temperature of 800 ℃ for 1.5 hours to obtain low-lithium aluminum slag and high-lithium condensate, wherein the high-lithium condensate is sent to a wet process to separate lithium salt and pyrolysis oil;
Wherein the low-lithium aluminum slag comprises the following elements:
al:79.12%, fe:11.25%, li:0.11%, P:6.15%, other elements: 3.37%;
the high-lithium condensate comprises the following elements:
al:3.24%, li:44.95%, P:1.12%, other elements: 50.69% of the total weight of the product;
(2) Under the stirring condition, carrying out high-temperature vacuum separation on the low-lithium aluminum slag at 1100 ℃ for 3 hours, carrying out depletion standing for 1 hour in vacuum after the completion of the separation of solid and liquid, carrying out vacuum slag skimming operation after the completion of the solid and liquid separation to obtain aluminum liquid and lithium-containing scum, and sending the lithium-containing scum to a wet process for separation to obtain lithium salt and iron phosphide;
Wherein the aluminum liquid comprises the following elements:
Al:99.77%, fe:0.05%, li:0.02%, P:0.03%, other elements: 0.13%;
The lithium-containing dross comprises the following elements:
Al:6.11%, fe:71.23%, li:2.11%, P:19.72%, other elements: 0.83%;
(3) And (3) refining the aluminum liquid for 10min by blowing argon, and performing slag skimming operation to obtain lithium-containing dross and pure aluminum liquid, wherein the lithium-containing dross is sent to a wet process for separation to obtain lithium salt and ferric phosphide.
Example 2
The embodiment provides a processing method of aluminum slag generated by recycling of a full-chain integrated battery, which comprises the following steps:
(1) Vacuum drying aluminum slag, crushing the aluminum slag until the mesh number is less than or equal to 100 meshes, then placing the obtained aluminum slag powder into a vacuum furnace with the vacuum degree of 5Pa, and carrying out low-temperature vacuum distillation at the temperature of 750 ℃ for 0.5h to obtain low-lithium aluminum slag and high-lithium condensate, wherein the high-lithium condensate is sent to a wet process to separate lithium salt and pyrolysis oil;
Wherein the low-lithium aluminum slag comprises the following elements:
Al:80.03%, fe:12.70%, li:0.11%, P:6.04%, other elements: 1.12%;
the high-lithium condensate comprises the following elements:
Al:2.11%, li:46.31%, P:2.52%, other elements: 49.06%;
(2) Under the stirring condition, carrying out high-temperature vacuum separation on the low-lithium aluminum slag at 1150 ℃ for 2.5h, carrying out depletion standing for 0.8h in vacuum after the completion of the separation of solid and liquid, and carrying out vacuum slag skimming operation to obtain aluminum liquid and lithium-containing slag, wherein the lithium-containing slag is sent to a wet process for separation to obtain lithium salt and ferric phosphide;
Wherein the aluminum liquid comprises the following elements:
Al:99.84%, fe:0.02%, li:0.01%, P:0.04%, other elements: 0.09%;
The lithium-containing dross comprises the following elements:
al:6.34%, fe:70.87%, li:2.54%, P:19.55%, other elements: 0.70%;
(3) And (3) argon blowing refining is carried out on the aluminum liquid for 15min, slag skimming operation is carried out, lithium-containing dross and pure aluminum liquid are obtained, and the lithium-containing dross is sent to a wet process for separation, so that lithium salt and iron phosphide are obtained.
Example 3
The embodiment provides a processing method of aluminum slag generated by recycling of a full-chain integrated battery, which comprises the following steps:
(1) Vacuum drying aluminum slag, crushing the aluminum slag until the mesh number is less than or equal to 100 meshes, then placing the obtained aluminum slag powder into a vacuum furnace with the vacuum degree of 5Pa, and carrying out low-temperature vacuum distillation at the temperature of 500 ℃ for 3 hours to obtain low-lithium aluminum slag and high-lithium condensate, wherein the high-lithium condensate is sent to a wet process to separate lithium salt and pyrolysis oil;
Wherein the low-lithium aluminum slag comprises the following elements:
Al:79.22%, fe:12.12%, li:0.14%, P:7.13%, other elements: 1.39%;
the high-lithium condensate comprises the following elements:
Al:2.65%, li:45.21%, P:2.65%, other elements: 49.49% of the total weight of the product;
(2) Under the stirring condition, carrying out high-temperature vacuum separation on the low-lithium aluminum slag at the temperature of 1000 ℃ for 3 hours, carrying out depletion standing for 0.5 hour in vacuum after the completion of the separation of solid and liquid, and carrying out vacuum slag skimming operation to obtain aluminum liquid and lithium-containing slag, wherein the lithium-containing slag is sent to a wet process for separation to obtain lithium salt and ferric phosphide;
Wherein the aluminum liquid comprises the following elements:
al:99.79%, fe:0.03%, li:0.02%, P:0.06%, other elements: 0.10%;
The lithium-containing dross comprises the following elements:
al:6.25%, fe:69.98%, li:3.41%, P:19.47%, other elements: 0.89%;
(3) And (3) carrying out argon blowing refining on the aluminum liquid for 20min, and carrying out slag skimming operation to obtain lithium-containing dross and pure aluminum liquid, wherein the lithium-containing dross is sent to a wet process for separation to obtain lithium salt and ferric phosphide.
Example 4
This example differs from example 1 in that the vacuum degree of the low-temperature vacuum distillation in step (1) is 10 2 Pa.
The remaining preparation methods and parameters remain the same as in example 1.
Example 5
This example differs from example 1 in that the temperature of the cryogenic vacuum distillation in step (1) is 300 ℃.
The remaining preparation methods and parameters remain the same as in example 1.
Example 6
This example differs from example 1 in that the temperature of the cryogenic vacuum distillation in step (1) is 1000 ℃.
The remaining preparation methods and parameters remain the same as in example 1.
Example 7
This example differs from example 1 in that the vacuum degree of the high-temperature vacuum separation in step (2) is 10 2 Pa.
The remaining preparation methods and parameters remain the same as in example 1.
Example 8
This example differs from example 1 in that the temperature of the high temperature vacuum separation in step (2) is 800 ℃.
The remaining preparation methods and parameters remain the same as in example 1.
Example 9
This example differs from example 1 in that the temperature of the high temperature vacuum separation in step (2) is 1500 ℃.
The remaining preparation methods and parameters remain the same as in example 1.
Example 10
This example differs from example 1 in that no depletion standing is performed in step (2).
The remaining preparation methods and parameters remain the same as in example 1.
Comparative example 1
This comparative example is different from example 1 in that the step (1) is not performed, but the aluminum slag is directly subjected to high-temperature vacuum separation.
The remaining preparation methods and parameters remain the same as in example 1.
Product detection and recovery rate calculation method
The products treated by the treatment methods provided in the above examples and comparative examples were subjected to ICP element detection to obtain aluminum recovery rate and lithium recovery rate.
The recovery rate calculation method comprises the following steps: recovery = (product quality x product grade)/(raw ore quality x raw ore grade) ×100%.
The test results are shown in Table 1.
TABLE 1
Analysis:
as can be seen from the table, the treatment method provided by the invention can realize recovery of valuable metal, especially lithium resources, in the aluminum slag generated by battery recovery, and solves the problems of difficult recovery and low recovery rate of lithium-containing aluminum foil in the waste battery recovery industry.
From examples 1 and 4, it is found that too high a vacuum degree of the low-temperature vacuum distillation results in oxidation of part of the aluminum foil and lower recovery of aluminum and lithium.
As is clear from examples 1 and 5-6, if the temperature of the low temperature vacuum distillation is too low, the metals are not completely separated, and the recovery rate is low; if the temperature of the low-temperature vacuum distillation is too high, pyrolysis oil is further decomposed into carbon oxides and water, so that part of lithium scum and iron are reduced into aluminum liquid, and the aluminum grade and the lithium recovery rate are low.
As is clear from examples 1 and 7, when the vacuum degree of the high-temperature vacuum separation is too high, the aluminum foil is oxidized, and the recovery rate of aluminum and lithium is low.
As is clear from examples 1 and 8-9, if the temperature of the high-temperature vacuum separation is too low, the melting point of aluminum slag is not reached, slag and gold are not separated, and the aluminum recovery rate is low; if the temperature of the high-temperature vacuum separation is too high, energy waste can be caused.
It is apparent from examples 1 and 10 that the absence of the depletion and standing results in inclusion in the aluminum liquid and a decrease in the aluminum grade.
As is clear from example 1 and comparative example 1, when aluminum slag is directly subjected to high-temperature vacuum separation, there is a loss of resources of lithium metal and pyrolysis oil, iron is reduced into aluminum liquid, and the aluminum liquid is difficult to handle, and the aluminum grade is lowered.
The applicant states that the process of the invention is illustrated by the above examples, but the invention is not limited to, i.e. does not mean that the invention must be carried out in dependence on the above process steps. It should be apparent to those skilled in the art that any modification of the present invention, equivalent substitution of selected raw materials, addition of auxiliary components, selection of specific modes, etc. fall within the scope of the present invention and the scope of disclosure.

Claims (10)

1. The processing method of aluminum slag generated by recycling of the full-chain integrated battery is characterized by comprising the following steps of:
(1) Pretreating aluminum slag, and then performing low-temperature vacuum distillation to obtain low-lithium aluminum slag and high-lithium condensate;
(2) And carrying out high-temperature vacuum separation on the low-lithium aluminum slag, and carrying out slag skimming operation to obtain aluminum liquid and lithium-containing dross.
2. The method of claim 1, wherein the step of preprocessing in step (1) comprises:
Crushing the aluminum slag until the mesh number is less than or equal to 100 meshes.
3. The process according to claim 1 or 2, wherein the cryogenic vacuum distillation of step (1) is carried out at a vacuum level < 10Pa.
4. A process according to any one of claims 1 to 3, wherein the low temperature vacuum distillation in step (1) is carried out at a temperature of 400 to 900 ℃ for a period of 0.5 to 3 hours.
5. The process according to any one of claims 1 to 4, wherein the high temperature vacuum separation of step (2) is performed at a vacuum level < 10Pa.
6. The process according to any one of claims 1 to 5, wherein the high temperature vacuum separation in step (2) is carried out at a temperature of 900 to 1300 ℃ for a time of 0.5 to 3 hours;
preferably, stirring is accompanied during the high temperature vacuum separation of step (2).
7. The method according to any one of claims 1 to 6, wherein the high-temperature vacuum separated product is subjected to depletion and standing before the slag skimming operation in step (2);
Preferably, the period of the depletion and standing is 0.5 to1 hour.
8. The method according to any one of claims 1 to 7, wherein the aluminum liquid of step (2) is further subjected to a post-treatment, the post-treatment comprising:
Refining the aluminum liquid to obtain pure aluminum liquid.
9. A process according to any one of claims 1 to 8, characterized in that it comprises the steps of:
(1) Vacuum drying aluminum slag, crushing the aluminum slag until the mesh number is less than or equal to 100 meshes, then placing the obtained aluminum slag powder in vacuum equipment with the vacuum degree less than 10Pa, and carrying out low-temperature vacuum distillation at 400-900 ℃ for 0.5-3 hours to obtain low-lithium aluminum slag and high-lithium condensate, wherein lithium salt and pyrolysis oil are separated from the high-lithium condensate in a wet process;
(2) Under the stirring condition, carrying out high-temperature vacuum separation on the low-lithium aluminum slag at 900-1300 ℃ for 0.5-3h, carrying out depletion standing for 0.5-1h after the completion of the separation, and carrying out slag skimming operation after the solid-liquid separation is completed to obtain aluminum liquid and lithium-containing scum, wherein the lithium-containing scum is separated in a wet process to obtain lithium salt and ferric phosphide;
(3) And (3) carrying out air blowing refining on the aluminum liquid for 5-30min to obtain pure aluminum liquid.
10. Use of a treatment process according to any one of claims 1 to 9 in the recovery of spent batteries.
CN202410457326.0A 2024-04-16 2024-04-16 Treatment method of aluminum slag generated by recycling full-chain integrated battery and application of treatment method Pending CN118326159A (en)

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Application Number Priority Date Filing Date Title
CN202410457326.0A CN118326159A (en) 2024-04-16 2024-04-16 Treatment method of aluminum slag generated by recycling full-chain integrated battery and application of treatment method

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