Hefei Hengli Breaks Through the Core Bottleneck of Lithium Battery Recycling with "High-Value Precision Control" Pyrolysis Technology

As is well known, high-temperature pyrolysis is a key link in the lithium battery recycling production line to achieve cost reduction and efficiency improvement. Hefei Hengli Equipment Co., Ltd. (hereinafter referred to as "Hengli Equipment"), with its more than 30 years of in-depth cultivation in the field of electrothermal equipment and deep involvement in the field of lithium battery equipment, has achieved a comprehensive evolution of the pyrolysis system by virtue of its rich engineering experience in addressing the challenges of material arching, seal failure, and equipment corrosion in lithium battery recycling.

1. Digital and intelligent simulation collaborative special mechanism to solve the problem of arching and blockage

After the battery crushed material is heated, the softening of the binder can easily lead to material agglomeration and bridging, causing feed blockage and seriously affecting the output quality. 

Hengli Equipment successfully tackled this stubborn problem by adopting a dual strategy of "specialized mechanism + digital and intelligent simulation": a specialized auxiliary mechanism was installed at the feed inlet to dynamically break up the agglomerated materials and achieve stable feeding. Meanwhile, digital and intelligent discrete element simulation technology was introduced to conduct in-depth analysis of the motion laws of the unloading layer on the surface of the material bed and the retention layer on the cylinder wall, based on which the material guiding structure, furnace tube inclination angle, and rotation speed were optimized. Through precise regulation combining simulation and empirical evidence, it was ensured that the pyrolysis time of the materials in the furnace was highly consistent, achieving high uniformity in pyrolysis quality while ensuring continuous and stable production of the production line. 

2. PPM-level oxygen content control, achieving high returns and intrinsic safety

The sealing level of the pyrolysis furnace is the lifeblood of production efficiency. Once oxygen leakage occurs, it will not only cause metal oxidation and product degradation, but may also induce thermal runaway, posing safety hazards. 

Hengli Equipment has established a multi-sealed protection system, which can achieve PPM-level control of oxygen content in the furnace. This significantly improves the metal recovery rate, while substantially reducing heat loss and atmosphere consumption, achieving a high degree of unity between production safety and low energy consumption in operation. 

3. System-level composite anti-corrosion design to extend the service life of furnace tubes

Hydrofluoric acid produced by the thermal decomposition of electrolyte is highly corrosive, causing frequent damage to traditional pyrolysis rotary furnace tubes and resulting in extremely high maintenance costs.

Hengli Equipment has established a systematic defense line for source fluorine reduction, environmental suppression, and material upgrading: First, by coordinating with the pre - stage low - temperature drying system to remove most of the electrolyte, achieving source fluorine reduction; Second, relying on a multi - seal system to maintain an oxygen - poor and water - poor environment, suppressing corrosion reactions; Finally, using explosive cladding technology to firmly attach special materials to the substrate, improving corrosion resistance while taking into account manufacturing economy. Measured verification shows that this solution can extend the service life of furnace tubes by more than 3 times, significantly reducing the enterprise's full - life cycle operating costs. 

IV. Conclusion

As industry competition intensifies, the stability and economic efficiency of equipment have become the key to ensuring stable production and increasing efficiency for lithium battery recycling enterprises. 

Hengli Equipment provides systematic solutions covering material balance, precise atmosphere control, and long-term anti-corrosion, helping customers build a safe and efficient production system and gain a head start in the industry reshuffle.