Polar fragment crushing and recycling equipment

Process Introduction:

This process can separate copper, aluminum, positive and negative electrode powders, graphite, stainless steel, plastic, iron, and separator paper from waste lithium-ion batteries. The specific process implementation plan is as follows: after being crushed by a dedicated crushing system for waste lithium-ion batteries, mixed materials such as copper, aluminum, and iron, as well as positive and negative electrode powders, are obtained through anaerobic cracking and vibrating screen screening; Further remove ferromagnetic substances from the mixed material through a magnetic separator; The remaining mixed materials are further crushed by a pulverizer to completely separate the positive and negative electrode powders from the current collector, and then sent to a multi frequency screen. Combined with bag filter, specific gravity air selection, and weathering technology, the positive electrode powder, copper particles, and aluminum particles can be separated. The diaphragm paper is burned out in the incinerator and finally absorbed by the spray tower.

The organic waste gas and dust generated during the entire lithium battery recycling process can be effectively removed through the process of intelligent pulse dust removal, anaerobic cracking, and chemical absorption. The dust and organic waste gas can be decomposed and purified through chemical absorption equipment to meet emission standards.

This process is controlled by PLC to achieve intelligent, energy-saving, and environmentally friendly operation of the entire system. The production line is easy to operate, with one shift of two people per line. This system can achieve intelligent sorting, material receiving, packaging and other means, set up electrical detection, intelligent alarm, intelligent overload warning and protection, cruise re inspection, dust and VOCs gas monitoring devices

process flow

Process characteristics and advantages

1. With a low failure rate and stable operation, it can work continuously for 24 hours, effectively solving the current problem of intermittent production of equipment,

2. Add multiple safety measures during the production process to ensure that there are no incidents of explosion, entanglement, combustion, etc

3. Low investment cost, neat and elegant appearance, small footprint, and low equipment maintenance cost.

4. Good separation effect, high recovery efficiency, with a recovery rate of over 95% for copper, aluminum, iron, etc., and a recovery rate of 97% for positive and negative electrode powders.

5. Good environmental protection effect, zero emissions of pollutants, mainly noise pollution, dust pollution, and organic waste gas pollution can be well controlled to meet national emission standards.

6. The equipment has low operating costs and low power consumption.

7. Wide processing range, any type of battery can be crushed and sorted.

8. Large processing capacity, flexible and versatile processes, customizable according to customer needs to meet different customer requirements for processes.

Process Explanation

This process involves feeding charged lithium batteries (retired lithium batteries, waste lithium batteries, or other batteries such as lithium iron phosphate batteries, ternary lithium batteries, etc.) into a lean oxygen crushing system. The crushed charged lithium battery materials (protected by inert gas) are directly fed into an anaerobic cracking system. The charged lithium batteries are heated and discharged in the cracking system to generate heat for secondary utilization of the charged electrical energy. At the same time, organic substances such as electrolytes, plastic films, plastics, and adhesives are self cracked, and the combustible gas produced by cracking is purified to provide heat to the cracking system. The cracked materials are cooled and sorted by magnetic separation air to separate iron, nickel, aluminum blocks, copper blocks, and stainless steel. Separate the electrode powder and metal particles by screening and grading the cracked electrode plates through friction and powder removal, The metal particles are further classified and sorted by specific gravity for copper aluminum separation. The various exhaust gases, pyrolysis combustible gases, and vacuum extraction generated are burned and heated by a comprehensive combustion system. The combustion exhaust gases are cooled and sprayed, separated from water vapor, and adsorbed to meet emission standards.

1. Inert gas is used to protect the crushing process, ensuring production stability and environmental friendliness. Additionally, charged lithium batteries generate heat during cracking, allowing for the reuse of electricity and reducing discharge costs and production expenses.

2. The amount of inert gas required for lithium battery charging recovery is relatively small, reducing production costs and difficulties. The same amount of waste gas treatment and waste water production is reduced, and the cracking combustible gas purification provides heating for the furnace. The combustion exhaust gas is treated with simple spraying to meet the emission standards.

3. The production process of charged recycling is relatively simple, and the investment in production line equipment is small, resulting in a small footprint. After the cracking of electrode pieces, the recovery rate of electrode powder and aluminum copper is high and the output is large. The annual processing capacity of a single production line can reach about 45000 tons;

4. Due to anaerobic cracking, it inhibits the production of harmful gases. Low investment in exhaust gas treatment, low treatment cost, and no need for thermal storage combustion equipment.

5. Before material cracking, large metal weights were not sorted out, and the sorted weights did not produce any odor.

6. Lithium hexafluorophosphate (LIPF6) volatilizes and pyrolyzes to produce hydrogen fluoride. Anhydrous hydrogen fluoride reacts with metals such as FE, AL, NI, MG to form a fluoride protective film that is insoluble in hydrogen fluoride. Therefore, solid and gaseous hydrogen fluoride are not corrosive.

7. Cracking combustible gas purification for furnace heating. The combustion exhaust gas is treated to meet emission standards and reduce emissions.