Co-recovery method and application of organic solid waste and waste lithium battery

Abstract

The invention relates to the field of high-value utilization of solid waste resources, in particular to a co-recovery method and application of organic solid waste and waste lithium batteries. The method comprises the following steps: mixing the lithium battery waste with organic solid waste to obtain a mixed material, and then carrying out microwave co-recovery treatment on the mixed material in a low-oxygen atmosphere, the organic solid waste is selected from one or more of plastic, biomass and rubber, and the lithium battery waste is a positive electrode material obtained by disassembling a waste lithium battery and an optional negative electrode material. The method has the characteristics of simplicity, economy, low consumption and high efficiency. According to the method, the organic solid waste and the waste lithium battery are co-recycled under the conditions of normal pressure, low oxygen and microwave irradiation by adopting a simple and convenient one-pot method, so that important basic raw materials such as high-yield synthesis gas, liquid oil and key battery metal elements are obtained, and the method has the advantages of simplicity, controllability, environment friendliness, easiness in implementation, economy, high efficiency and wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-value utilization of solid waste resources, and in particular to a co-recovery method of organic solid waste and waste lithium batteries and application. BACKGROUND

[0002] Organic solid waste is mainly plastic and biomass, which is rich in various valuable elements. Developing effective technologies for efficient recycling of them has become a global concern. Waste plastics are one of the most widely used materials. With the rapid development of its industrial chain, the global plastic production has exceeded 410 million tons per year, but the annual waste amount is more than 70%, which has caused serious resource waste. Biomass is a renewable resource with abundant reserves and huge output. The rich C, H and O elements contained in it are important building blocks for various basic chemical raw materials. Efficient utilization of them is of great significance for the development of green and low-carbon economy and the promotion of industrial transformation. However, the utilization rate of both plastics and biomass is far from enough.

[0003] In recent years, lithium-ion batteries have played a crucial role in promoting social development and improving the quality of life, and their demand continues to grow. However, with the large consumption and use of lithium batteries, the amount of potential retired batteries continues to rise, and it is estimated that the global amount of retired batteries will exceed 20 million tons by 2030. At the same time, the cost of raw materials needed for the production of lithium-ion batteries is rising, and resources are becoming increasingly scarce (especially lithium metal), which poses a major challenge to sustainable development. Therefore, it is urgent to shift to a closed-loop solution for key elements by recycling waste lithium-ion batteries, rather than simply relying on natural metal resources.

[0004] However, despite the significant progress made in the utilization technology of plastics, biomass and waste lithium batteries, these technologies are often limited to a single material stream, and their adaptability and economic competitiveness are relatively weak. Therefore, it is of great practical significance to develop a one-pot efficient recovery method for organic solid waste such as plastics and biomass and waste lithium batteries. SUMMARY

[0005] To solve the above technical problems, the present application provides a co-recovery method of organic solid waste and waste lithium batteries and application. The present application can obtain high-yield synthesis gas, liquid oil and key battery metal elements and other important basic raw materials by co-recovery of organic solid waste and waste lithium batteries. This method has the advantages of simplicity, controllability, green environmental protection, easy implementation, economic efficiency and broad application prospects.

[0006] In a first aspect, the present application provides a method for co-recovery of organic solid waste and waste lithium batteries, comprising: mixing lithium battery waste with organic solid waste to obtain a mixture, and subjecting the mixture to microwave co-recovery treatment under a low-oxygen atmosphere; the organic solid waste is selected from one or more of plastic, biomass, and rubber, and the lithium battery waste is positive electrode material and optionally negative electrode material obtained by disassembling waste lithium batteries. The present application efficiently converts organic solids (biomass, waste plastic) and waste lithium batteries into syngas, liquid oil, and key metals synthesized from lithium batteries through one-pot catalytic co-recovery process under normal pressure and low-oxygen atmosphere. The microwave-assisted co-recovery process of organic solid waste and waste lithium batteries is simple, controllable, green, environmentally friendly, easy to implement, and has high product added value. The present application can effectively reduce the high cost and complex process caused by detailed sorting, thereby enhancing the economic efficiency of the technology, reducing the cost and simplifying the recycling process.

[0007] As a preferred, the biomass is selected from one or more of straw, sawdust, bagasse, rice chaff, bamboo powder, and tea leaves; and / or, the plastic is selected from one or more of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polytetrafluoroethylene, and polyvinylidene fluoride. In the present application, by mixing lithium battery waste with organic solid waste such as plastic and biomass, and subjecting to microwave co-recovery under a low-oxygen atmosphere, the heating characteristics of microwave and the anti-oxidation effect of low-oxygen environment are utilized to realize efficient conversion of organic solid waste into syngas and liquid oil, while simultaneously recovering key metals from lithium batteries, simplifying the traditional sorting process and improving resource utilization. Common types of biomass such as straw, rice chaff, and bamboo powder are blended with lithium battery waste and subjected to microwave action to synergistically promote chemical bond breaking with lithium battery metal sites, which can improve the conversion rate of organic components and enhance the reduction and recovery efficiency of metals such as lithium. The plastic used at the same time, such as polyethylene and polypropylene, forms a catalytic system with metal oxides in lithium battery waste in the microwave field, and the reducing gas generated by plastic pyrolysis can reduce lithium battery metals in situ, while the interaction between plastic and biomass can adjust the ratio of syngas and liquid oil in the product, thereby improving the added value of the product.

[0008] Further preferably, the mass ratio of the organic solid waste to the lithium battery waste is (0.01-100):(0.01-100). By adjusting the ratio of organic solid waste to lithium battery waste, the reducing atmosphere generated by pyrolysis of organic solid waste is better matched with the action of lithium battery metals, enhancing the treatment effect of lithium battery metals, improving the lithium recovery rate, and optimizing the distribution of organic solid waste cracking products.

[0009] Further preferably, the mixture further comprises a microwave heating medium; the microwave heating medium comprises one or more of graphite, silicon carbide, battery material, activated carbon, biochar, zinc oxide, indium oxide. The introduced microwave heating medium, in cooperation with the lithium battery waste, further accelerates the pyrolysis of organic solid waste while reducing the activation energy of metal oxide reduction and process energy consumption.

[0010] Further preferably, the organic solid waste is biomass and / or plastic, the lithium battery waste comprises positive electrode material obtained by disassembling waste lithium batteries, and the microwave heating medium is selected from one or more of activated carbon, zinc oxide, and indium oxide.

[0011] Further preferably, the mass ratio of the microwave heating medium, the organic solid waste, and the lithium battery waste is (0-1):(0.01-100):(0.01-100); preferably, the mass ratio of the microwave heating medium, the organic solid waste, and the lithium battery waste is (2-16):(3-27):(4-33), such as 5:4:10, 3:6:4, 3:12:16, 16:27:33, 2:13:6, 10:3:5, and any range therebetween. Using the preferred ratio can further improve the microwave treatment effect and efficiency.

[0012] Further preferably, the microwave frequency is 915 MHz or 2.45 GHz; in the microwave co-recovery treatment, at least 1 W of microwave power is consumed per gram of material, for example, 4.67-12 W of microwave power is consumed per gram of material. This allows the microwave energy to better act on the material, and the wave-absorbing effect of the microwave heating medium cooperates to generate a high-temperature field, selectively breaks the chemical bonds of the organic solid waste to generate synthesis gas and liquid oil, and ensures efficient dissolution of lithium battery metals in a high-temperature reducing atmosphere.

[0013] Further preferably, the oxygen content of the low-oxygen atmosphere is 0-1000 ppm. This prevents excessive loss of organic solid waste while avoiding oxidation of lithium battery metals, in combination with microwave treatment, and reduces metal oxides generated by the reaction, improving the water solubility of lithium salts and laying the foundation for subsequent recovery.

[0014] Further preferably, it further comprises post-treatment, the post-treatment comprises condensing and collecting gas and oil, and drying and leaching the solid; preferably, the reaction gas is condensed at -10-5℃ to separate the gas and oil products; after the reaction, the solid is removed and deionized water with a mass of 3-500 times that of the solid is added for water leaching and filtration to recover lithium metal; after water leaching, the solid is calcined at 400-800℃ or treated with 0.1-5 mol / L hydrochloric acid / sulfuric acid for iron, nickel, cobalt, and manganese element recovery.

[0015] In a second aspect, the present application provides an application of the above-mentioned co-recovery method of organic solid waste and waste lithium batteries in the preparation of synthesis gas, liquid oil and the recovery of key battery metal elements, including lithium. The co-recovery method of organic solid waste and waste lithium batteries provided by the present application has an organic component conversion rate of more than 80%, generates synthesis gas or liquid oil products, and has a lithium ion recovery rate of more than 99% and a recovery rate of other battery component metals of more than 90%.

[0016] The present application has at least the following advantages: through microwave-assisted co-recovery of plastics, biomass and waste lithium batteries, the process is simplified, and the co-recovery and value-added utilization of mixed solid waste are achieved, and the economic and environmental benefits are improved. The present application integrates the advantages of different materials, takes organic components as the key reducing medium, and uses waste lithium batteries as catalysts to realize the synergistic recovery of mixed materials. In this process, the chemical bonds of organic components are broken under the catalytic action of battery metal sites, and the conversion rate of organic components is more than 80%, generating synthesis gas or liquid oil products. At the same time, the reducing medium generated in the reaction effectively reduces lithium or combines with carbon oxides, and converts them in situ into lithium salt, and then recovers lithium metal by water immersion, and the lithium recovery rate is more than 90%. The remaining metals can be recovered by simple calcination or acid leaching, and the recovery rate is more than 85%. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 The process flow chart provided by the embodiments of the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] The endpoints of the ranges and any values described in this disclosure are not limited to the precise values set forth. The ranges and values should be interpreted as being approximate. Values between the endpoints of any range or the respective endpoints and single points are included in the range or ranges unless otherwise indicated. The same can apply to any numerical range or value unless otherwise indicated.

[0021] Unless otherwise indicated, technical or conditions not specified in the embodiments of the present application are carried out according to the techniques or conditions described in the literature in the art or according to the product instructions. The devices, instruments, reagents, etc. used are not specified by the manufacturer, and are conventional products that can be purchased through regular channels. The experimental reagents and raw materials involved are commercially available, and the reagents are analytical pure products.

[0022] In the embodiments of the present application, the positive and negative electrode materials obtained after disassembling the waste lithium battery are provided by a waste lithium battery recycling company, and the microwave absorbing medium is purchased from Aladdin, MacLaren and other manufacturers. Organic solid waste is collected from the surrounding environment and landfill.

[0023] Example 1 This embodiment provides microwave-assisted co-recovery of straw and waste lithium batteries, as shown in the following specific operation steps: Figure 1 As shown in the following specific operation steps: 1) The collected waste lithium batteries are disassembled to obtain positive and negative electrode materials, and then the positive, negative and crushed straw are mixed in a mass ratio of 20:1:10.

[0024] 2) 50 g of the mixed material is placed in a reaction container, and then the oxygen in the reaction system is purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content is <1000 ppm; then the microwave irradiation power is set to 600 W (2450 MHz), the reaction temperature is 420 ℃, and the reaction is carried out under this condition for 20 min; the product is cooled to 0 ℃ to collect gas and oil, and the solid material is taken out and added with 500 ml of deionized water for water immersion at room temperature for 24 h, followed by filtration, 120 ℃ evaporation, 80 ℃ drying and other processes to recover lithium, and the filtered solid is calcined at 500 ℃ in air for 2 h to recover nickel-cobalt metal. The gas mass fraction is 60 wt%, the oil mass fraction is 20 wt%, the selectivity of synthesis gas in the gas is 70%, the lithium recovery rate is 92%, and the nickel-cobalt metal recovery rate is 88%.

[0025] Example 2 This embodiment provides microwave-assisted co-recovery of straw, rice chaff and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries are disassembled to obtain positive and negative materials, and then the positive, silicon carbide, and crushed straw and rice chaff are mixed in a mass ratio of 10:5:3:1.

[0026] 2) 70 g of the mixed material is placed in a reaction container, and then the oxygen in the reaction system is purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content is <1000 ppm; then the microwave irradiation power is set to 400 W (2450 MHz), the reaction temperature is 400 ℃, and the reaction is carried out under this condition for 35 min; the product is condensed at 0 ℃, and the gas and oil are collected, the solid material is taken out, 100 ml of deionized water is added for water immersion at room temperature for 20 h, and then the lithium is recovered through the processes of filtration, evaporation at 150 ℃, and drying at 80 ℃, and the solid after filtration is immersed in 50 ml of 2 mol / L hydrochloric acid for 20 h to recover the cobalt metal. The gas mass accounts for 45wt%, the oil mass accounts for 38wt%, the selectivity of synthesis gas in the gas is 75%, the lithium recovery rate is 95%, and the cobalt metal recovery rate is 86%.

[0027] Example 3 This example provides microwave-assisted co-recovery of rice chaff, polyethylene waste plastic, polypropylene waste plastic, and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries are disassembled to obtain positive and negative materials, and then the positive, negative, and crushed rice chaff, polyethylene waste plastic, and polypropylene waste plastic are mixed in a mass ratio of 33:16:3:10:17.

[0028] 2) 60 g of the mixed material is placed in a reaction container, and then the oxygen in the reaction system is purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content is <1000 ppm; then the microwave irradiation power is set to 550 W (915 MHz), the reaction temperature is 350 ℃, and the reaction is carried out under this condition for 30 min; the product is condensed at 5 ℃, and the gas and oil are collected, the solid material is taken out, 800 ml of deionized water is added for water immersion at room temperature for 28 h, and then the lithium is recovered through the processes of filtration, evaporation at 140 ℃, and drying at 80 ℃, and the solid after filtration is immersed in 100 ml of 1 mol / L hydrochloric acid for 20 h to recover the iron metal. The gas mass accounts for 40wt%, the oil mass accounts for 50wt%, the selectivity of synthesis gas in the gas is 60%, the lithium recovery rate is 93%, and the iron metal recovery rate is 90%.

[0029] Example 4 This example provides microwave-assisted co-recovery of straw, polyethylene, polypropylene, polyvinyl chloride, and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries are disassembled to obtain positive and negative materials, and then the positive, biochar, and crushed straw, polyethylene, polypropylene, and polyvinyl chloride are mixed in a mass ratio of 10:14:6:5:5:2.

[0030] 2) 100 g of the mixed material is placed in a reaction container, and then nitrogen is used to purge the oxygen in the reaction system for 10 min at a flow rate of 50 ml / min, and the oxygen content is <1000 ppm; then the microwave irradiation power is set to 700 W (915 MHz), the reaction temperature is 400 ℃, and the reaction is carried out under this condition for 15 min; the product is condensed at -1 ℃ to collect gas and oil, and the solid material is taken out and added with 200 ml of deionized water for water immersion at room temperature for 10 h, and then filtered, evaporated at 130 ℃, and dried at 80 ℃ to recover lithium, and the filtered solid is calcined at 400 ℃ in air for 4 h to recover nickel and cobalt metals. The gas mass fraction is 65wt%, the oil mass fraction is 28wt%, the selectivity of synthesis gas in the gas is 77%, the lithium recovery rate is 99%, and the nickel and cobalt metal recovery rate is 95%.

[0031] Example 5 This example provides microwave-assisted co-recovery of rice chaff, bamboo powder, polyethylene, polypropylene, polyvinyl chloride, and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries are disassembled to obtain positive and negative materials, and then the positive, zinc oxide, and crushed rice chaff, bamboo powder, polyethylene, polypropylene, and polyvinyl chloride are mixed in a mass ratio of 40:27:6:15:37:3:5.

[0032] 2) 150 g of the mixed material is placed in a reaction container, and then nitrogen is used to purge the oxygen in the reaction system for 10 min at a flow rate of 50 ml / min, and the oxygen content is <1000 ppm; then the microwave irradiation power is set to 700 W (2450 MHz), the reaction temperature is 380 ℃, and the reaction is carried out under this condition for 25 min; the product is condensed at -5 ℃ to collect gas and oil, and the solid material is taken out and added with 300 ml of deionized water for water immersion at room temperature for 30 h, and then filtered, evaporated at 150 ℃, and dried at 80 ℃ to recover lithium, and the filtered solid is added with 50 ml of 1.5 mol / L hydrochloric acid for impregnation for 15 h to recover nickel, cobalt, and manganese metals. The gas mass fraction is 53wt%, the oil mass fraction is 41wt%, the selectivity of synthesis gas in the gas is 69%, the lithium recovery rate is 97%, and the nickel, cobalt, and manganese metal recovery rate is 87%.

[0033] Example 6 This example provides microwave-assisted co-recovery of rice chaff, bamboo powder, polyethylene, polypropylene, polyvinyl chloride, and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries were disassembled to obtain positive and negative materials, then the positive, activated carbon and crushed rice chaff, bamboo powder, polyethylene, polypropylene, polyvinyl chloride were mixed in a mass ratio of 36:30:31:6:7:1:1.

[0034] 2) 120 g of the mixed material was placed in a reaction container, then the oxygen in the reaction system was purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content was <1000 ppm; then the microwave irradiation power was set to 600 W (2450 MHz), the reaction temperature was 400 ℃, and the reaction was carried out under this condition for 25 min; the product was condensed at -2 ℃, and the gas and oil were collected, then the solid material was taken out and added with 500 ml of deionized water for water immersion at room temperature for 20 h, followed by filtration, evaporation at 120 ℃, drying at 80 ℃, etc. to recover lithium, and the filtered solid was calcined at 600 ℃ in air for 2 h to recover nickel, cobalt and manganese metals. The gas mass fraction was 88wt%, the oil mass fraction was 9wt%, the selectivity of synthesis gas in the gas was 90%, the lithium recovery rate was 99%, and the nickel, cobalt and manganese metal recovery rate was 95%.

[0035] Example 7 This example provides microwave-assisted co-recovery of bamboo powder, polyvinyl chloride and waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries were disassembled to obtain positive and negative materials, then the positive, activated carbon and crushed bamboo powder, polyvinyl chloride were mixed in a mass ratio of 12:3:13.

[0036] 2) 200 g of the mixed material was placed in a reaction container, then the oxygen in the reaction system was purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content was <1000 ppm; then the microwave irradiation power was set to 600 W (2450 MHz), the reaction temperature was 500 ℃, and the reaction was carried out under this condition for 25 min; the product was condensed at 0 ℃, and the gas and oil were collected, then the solid material was taken out and added with 600 ml of deionized water for water immersion at room temperature for 30 h, followed by filtration, evaporation at 120 ℃, drying at 80 ℃, etc. to recover lithium, and the filtered solid was calcined at 600 ℃ in air for 2 h to recover nickel, cobalt and manganese metals. The gas mass fraction was 77wt%, the oil mass fraction was 12wt%, the selectivity of synthesis gas in the gas was 85%, the lithium recovery rate was 96%, and the nickel, cobalt and manganese metal recovery rate was 93%.

[0037] Comparative Example 1 This comparative example provides microwave-assisted recovery of waste lithium batteries, and the specific operation steps are as follows: 1) The collected waste lithium batteries were disassembled to obtain positive and negative materials.

[0038] 2) 50 g of the positive electrode material was placed in a reaction vessel, and then the oxygen in the reaction system was purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content was <1000 ppm; then the microwave irradiation power was set to 600 W (2450 MHz), the reaction temperature was 500 ℃, and the reaction was carried out under this condition for 25 min; after the solid material was taken out, 600 ml of deionized water was added for water immersion at room temperature for 30 h, and then the lithium was recovered through the processes of filtration, evaporation at 120 ℃, and drying at 80 ℃; and then 100 ml of 1 mol / L hydrochloric acid was added to the solid after filtration for impregnation for 20 h to recover the nickel-cobalt-manganese metal. The lithium recovery rate was 51%, and the nickel-cobalt-manganese metal recovery rate was 47%.

[0039] Comparative Example 2 This comparative example provides microwave-assisted recovery of waste lithium batteries, and the specific operation steps are as follows: 1) The positive electrode and negative electrode materials were obtained after the collected waste lithium batteries were disassembled, and then the positive electrode and negative electrode were mixed in a mass ratio of 3:1.

[0040] 2) 50 g of the mixed material was placed in a reaction vessel, and then the oxygen in the reaction system was purged with nitrogen for 10 min at a flow rate of 50 ml / min, and the oxygen content was <1000 ppm; then the microwave irradiation power was set to 600 W (2450 MHz), the reaction temperature was 500 ℃, and the reaction was carried out under this condition for 25 min; after the solid material was taken out, 600 ml of deionized water was added for water immersion at room temperature for 30 h, and then the lithium was recovered through the processes of filtration, evaporation at 120 ℃, and drying at 80 ℃; and then the solid after filtration was calcined at 600 ℃ in air for 2 h to recover the nickel-cobalt-manganese metal. The lithium recovery rate was 43%, and the nickel-cobalt-manganese metal recovery rate was 65%.

[0041] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions described in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for co-recycling organic solid waste and waste lithium batteries, characterized in that, include: Lithium battery waste is mixed with organic solid waste to obtain a mixture, which is then subjected to microwave co-recycling treatment under a low-oxygen atmosphere. The organic solid waste is selected from one or more of plastics, biomass, and rubber, and the lithium battery waste consists of positive electrode materials and optional negative electrode materials obtained from the dismantling of waste lithium batteries.

2. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to claim 1, characterized in that, The biomass is selected from one or more of straw, sawdust, bagasse, rice husk, bamboo powder, and tea leaves; and / or the plastic is selected from one or more of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, polytetrafluoroethylene, and polyvinylidene fluoride.

3. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to claim 1 or 2, characterized in that, The mass ratio of the organic solid waste to the lithium battery waste is (0.01-100):(0.01-100).

4. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to claim 3, characterized in that, The mixture also includes a microwave heating medium; the microwave heating medium is selected from one or more of graphite, silicon carbide, battery materials, activated carbon, biochar, zinc oxide, and indium oxide, preferably selected from one or more of activated carbon, zinc oxide, and indium oxide.

5. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to claim 4, characterized in that, The organic solid waste is biomass and / or plastics; the lithium battery waste includes positive electrode materials obtained from the dismantling of waste lithium batteries; the microwave heating medium is activated carbon or zinc oxide.

6. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to claim 5, characterized in that, The mass ratio of the microwave heating medium, organic solid waste, and lithium battery waste is (0-1):(0.01-100):(0.01-100).

7. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to any one of claims 1-6, characterized in that, The microwave frequency is 915 MHz or 2.45 GHz.

8. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to any one of claims 1-7, characterized in that, The oxygen content of the low-oxygen atmosphere is 0~1000 ppm.

9. The microwave-assisted co-recycling method for organic solid waste and waste lithium batteries according to any one of claims 1-8, characterized in that, It also includes post-processing, which includes condensing and collecting gases and oils, and drying and leaching solids.

10. The method for co-recycling organic solid waste and waste lithium batteries according to any one of claims 1-9 is used in the preparation of syngas, liquid oil and the recovery of key battery metal elements, wherein the key battery metal elements preferably include lithium, iron, nickel, cobalt and manganese.

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