Zhengzhou Zhengyang Machinery Equipment Co., Ltd

How to dispose of used lithium batteries after recycling?

2021-06-25

How to deal with the new "black pollution" solid waste has become a hot topic of social discussion and attention in the new era. So, what are the effective ways to recycle used tires?

Retreading of used tires-the new embodiment of the circular economy is the refurbishment of used tires. As the name implies, the used tires are processed and put on the market for reuse. From this it seems that the retreading and reuse of used tires will play a role in promoting the development of circular economy.

Restructuring of the original shape of waste tires-turning waste into treasure. The original shape reformation, as the name suggests, is to transform waste tires into valuable items through various methods, including bundling, cutting, and punching.

Lithium Battery Recycling Machine

Lithium Battery Recycling Machine

Paving the road with waste tires-new technology and new life. Used tires used for paving roads are called rubber asphalt. This new method of recycling waste tires originated in the United States in the 1960s-processing waste tires into rubber powder, which is added to asphalt as a modifier.

Solid waste fuel-the embodiment of light and heat. Waste tires are a kind of high calorific value material. The calorific value per kilogram is 69% higher than that of wood, 10% higher than bituminous coal, and 4% higher than coke. The waste tires are crushed, and then mixed with various combustible wastes in a certain proportion to prepare solid waste fuel (RDF) for blast furnace injection instead of coal, oil and coke as fuel for burning cement or for coal and thermal power generation. At the same time, the method has a by-product-carbon black is generated, which can be used as a reinforcing agent for the production of rubber products after activation.

Reclaimed rubber-the reproduction of tires. Using chemical methods to desulfurize waste tire rubber to obtain recycled rubber is an ancient method for comprehensive utilization of waste tires. The currently used reclaimed rubber production technologies include dynamic desulfurization, normal temperature regeneration, low temperature regeneration, low temperature phase transfer catalytic desulfurization, microwave regeneration, radiation regeneration, and extrusion regeneration.

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How to dispose of used lithium batteries after recycling?

For the internal structure of lithium-ion batteries, we know that the internal charge of the battery is conducted by ions, for lithium-ion batteries, it is lithium ions, and externally, it relies on electrons. Most of the positive and negative materials of lithium-ion batteries are poor electronic conductors (but can conduct lithium ions), so this requires an electronic conductor—here called a current collector and a very ear to form an external electronic circuit. For lithium-ion batteries, metal aluminum foil is generally used as the positive electrode current collector, and aluminum is very lug; while the negative electrode current collector is metal copper foil, and nickel is lug. Among them, there are four key materials for lithium battery cells: positive electrode, negative electrode, electrolyte, and diaphragm as shown in the following figure:

With the rapid development and application of lithium batteries, a large number of discarded lithium battery materials are produced. It is reported that waste lithium batteries contain high-value metal cobalt and lithium. Waste lithium batteries contain copper (about 35%) as a widely used primary production material. Can be used as additives for plastics and rubber. Therefore, the negative electrode materials of waste lithium batteries constitute a useful separation, which can promote the completion of the capitalization of waste lithium batteries and eliminate the corresponding environmental impact. In the future, the recycling of lithium ion batteries will not only recover the useful resources in them, It is also inevitably required to properly handle substances that can bring adverse effects to the environment. At the same time, according to the development of lithium-ion batteries and future environmental requirements, the production line of lithium-ion battery crushing equipment will develop in the direction of integration and diversification in the future. The following related equipment production lines are introduced:

Mechanical processing technology is currently the main technology used for metal recovery in scrapped lithium-ion batteries. Therefore, its recycling and utilization is also advancing continuously with the development of crushing technology. Among them, the use of shredding and the development of crushing and separation technology are relatively mature. At present, this technology has been applied in the recycling of lithium-ion batteries. With the continuous improvement of environmental requirements, this technology is bound to be widely used in the recycling of lithium-ion batteries. Jixin develops a lithium battery crushing and recycling equipment line. The scrap batteries enter the shredder for shredding, and the shredded battery enters a special shredder for crushing. The positive and negative plates and the diaphragm paper inside the battery are scattered, and the scattered materials are processed. The induced draft fan enters the collector, and then the dust generated in the crushing is collected and purified by the pulse dust collector. The material entering the collector enters the air-flow sorting screen through the closed air device, and the diaphragm in the positive and negative plates is separated by airflow and vibration. The paper is collected, and the dust generated by the air separator is collected at the same time. Then, the mixture is separated and recycled using a combined process of hammer crushing, vibrating screening and airflow sorting to separate and recover the positive and negative electrode components of the waste lithium battery. The experiment uses ICP-AES to analyze the metal grades of the experimental samples and the separation and enrichment products. The results show that after crushing and screening the positive and negative materials, the grade of copper and aluminum in the crushed material with a particle size greater than 0.250 mm is 92.4%, and the grade of the positive and negative materials in the crushed material with a particle size of less than 0.125 mm is 96.6%. Both can be recycled directly; among the crushed materials with a particle size of 0.125~0.250 mm, the grades of copper and aluminum are lower and can be separated by air flow, and the operating air flow speed is 1.00 m/s. Realize the effective separation and recovery of copper, aluminum and anode and cathode materials.

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