Author ：Iflowpower – Portable Power Station Supplier
Lithium-ion battery (hereinafter referred to as lithium battery) is quickly occupied the power source market of portable electronic and electrical equipment since its commercialization due to high voltage height, large capacity, long life and no memory effect, and quickly occupied the power source market of portable electronic electrical equipment since its commercialization. Big. Lithium battery is an electronic consumable, life is about 3A.
Lithium batteries after the waste, such as improper treatment, the hexafluorophosphate contained in hexafluorophosphate, carbonate organic matter, and cobalt, copper, etc., will inevitably constitute potential pollution threats to the environment. On the other hand, cobalt, lithium, copper and plastics in waste lithium batteries are valuable resources, with extremely high recovery value.
Therefore, scientific effective treatment for waste lithium batteries, not only has significant environmental benefits, but also has good economic benefits. The lithium battery is mainly composed of housing, positive electrode, negative electrode, and electrolyte and membrane. The positive electrode is to consist of the lithium cobalt powder to the two sides of the aluminum foil concentration fluid by a bonded PVDF; the negative electrode structure is similar to the positive electrode, and is bonded from the carbon powder on both sides of the copper foil collector.
At present, the waste lithium battery resource research is mainly concentrated in the recovery of high valuable metal cobalt and lithium values, and the separation and recovery of negative electrode materials. In order to alleviate the rapid economic development, the increasingly serious resource shortage and environmental pollution, and the total component recycling and utilization of waste materials has become a global consensus. Copper (content of about 35%) in the negative electrode of the waste lithium battery is a widely used important production raw material, which is adhered to the toner, which can be used as additives such as plastics, rubber.
Therefore, it is effective for effective separation of the lithium battery negative constituting material, and it is promoted to maximize the resource of cancellation, eliminate its corresponding environmental impact. Commonly used waste lithium battery resource system includes wet metallurgy, fire-making metallurgy and mechanical physics. Compared to wet and fire, mechanical physics does not need to use chemical reagents, and lower energy consumption is a environmentally friendly and efficient method.
Based on the characteristics of the negative electrode structure of the lithium battery, the author uses the broken screen and the airflow sorting combination process to separate the enrichment study to achieve high-efficiency separation and recovery of the anematic copper and toner. Waste lithium battery positive and negative recovery equipment Working principle: Based on the positive and negative electrode structure of lithium battery and its composition of material copper and toner, it is composed of a hammer fraction, vibration screening and airflow sorting combination process to waste lithium battery negative electrode Material for separation and recycling. Experiments use ICP-AES analysis experimental samples and metal tastes separating enriched products.
The results showed that after the aperture material was broken, the copper was 92.4% in a broken material greater than 0.250 mm, while the particle size of less than 0.
125 mm was 96.6%, which can be directly recovered. In a broken material having a particle size of 0.
125 to 0.250 mm, the grade of copper is low, and the effective separation recovery of copper and toner can be achieved by airflow sorting; during airflow sorting, the operating gas flow rate is 1.00m / s, copper The recovery rate is 92.
3%, with a taste of 84.4%. Key words: waste lithium-ion battery; negative electrode material; broken; airflow sort.
Positive and negative electrode recovery equipment of waste lithium battery: 1) Through the hammering, the vibration screening and airflow sorting process can realize the resource utilization of metal copper and toner in the negative electrode material of the waste lithium battery. 2) The negative electrode material can effectively realize the mutual peeling between the toner and the copper foil, and then the copper foil and carbon powder are initially separated by the vibrating sieve of the particulate size and the difference in shape. The hammer chammeters and sieve separation results show that the copper and carbon powder are enriched in a particle size greater than 0.
250 mm and the particle size of less than 0.125 mm, respectively, and the grades are as high as 92.4% and 96.
6%, and they can directly send downstream enterprises. use. 3) For crushing particles having a particle size of 0.
125 to 0.250 mm, the copper is low, the gas flow sorting can be used to achieve effective separation between copper and toner, and obtain a good recovery effect when the airflow speed is 1.00 m / s.
The recovery rate of metal copper can reach 92.3%, and the product is 84.4%.
This equipment is mainly used for lithium-ion battery manufacturers, separating the aluminum Bo, copper hoops in the scrapped positive and negative electrode sheets, and separating the positive and negative electrode materials for circulation Useful. The complete equipment is operated in a negative pressure state, no dust diarrhea, the separation efficiency can reach more than 98%. .
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