Lithium Battery Black Mass Recycling Rotary Kiln Furnace Customized

Lithium battery black mass recycling rotary kiln

1.Product Introduction Calcination Rotary Kiln

The Lithium Battery Black Mass Recycling Rotary Kiln is the core thermal engineering equipment for the resource recovery of spent lithium-ion batteries. It is specifically designed for the high-temperature pyrolysis and carbonization of "Black Mass" (the mixture of cathode and anode active materials) obtained after crushing and sorting. Featuring a horizontal rotating cylinder structure under the protection of an inert atmosphere (Nitrogen or Argon), the kiln achieves the efficient decomposition of hazardous components such as organic binders (e.g., PVDF) and residual electrolytes. This process preserves the chemical activity of high-value metals like Lithium, Cobalt, Nickel, and Manganese, providing a high-grade feedstock for subsequent hydrometallurgical lithium extraction. The system integrates electromagnetic induction heating, hermetic atmosphere control, anti-clogging technology, and multi-stage off-gas treatment for continuous, automated, and low-emission industrial applications.

2.Application Calcination Rotary Kiln

• EV Battery Recycling: Processing electrode plates and black mass from decommissioned New Energy Vehicle (NEV) battery packs for resource regeneration.

• Consumer Electronics Recycling: Centralized pyrolysis treatment for small-scale lithium batteries from mobile phones, laptops, etc.

• Material Regeneration Plants: Acting as the critical front-end equipment for hydrometallurgical recovery, enhancing black mass purity and leaching efficiency.

• Environmental Remediation: Reducing direct emissions of fluorine and phosphorus-containing hazardous gases to meet regulatory requirements.

• R&D and Pilot Platforms: Supporting process verification and parameter optimization for technical industrialization.

3.Working Principle Calcination Rotary Kiln

• Preheating & Desolvation (200–400°C): Black mass enters the front end of the kiln via a sealed feeding system. Electrolyte residues and low-boiling organics are initially volatilized in a low-oxygen environment.

• High-Temperature Pyrolysis & Carbonization (500–800°C): As the kiln rotates, the material advances to the mid-temperature zone where binders undergo anaerobic cracking. This generates combustible pyrolysis gases and solid-phase defluorinated carbonized material, facilitating the clean separation of active materials from copper and aluminum foils.

• Atmosphere Control & Safety: The entire process is protected by $N_2$ or $Ar$, with oxygen content strictly maintained at <100 ppm to prevent metal oxidation. Negative pressure operation prevents the leakage of hazardous gases.

• Energy Self-Balancing: Combustible gases generated during pyrolysis are purified and fed back into the combustion chamber to support heating, achieving thermal energy recycling and lowering operational costs.

• Cooling, Discharge & Off-gas Treatment: Pyrolysis products are cooled to <80°C via a water-cooled rotary discharger. Flue gas passes through cyclone dust removal, a quenching tower, acid-alkali absorption, and an RTO (Regenerative Thermal Oxidizer) system to ensure emissions meet environmental standards.

4.Advantages Calcination Rotary Kiln

• High Recovery Rates: Precision temperature control and uniform heating ensure stable lithium compound activity. Lithium recovery from black mass is ≥90%, with Copper >98% and Aluminum >99%.

• Energy Saving & Eco-Friendly: Electromagnetic induction heating achieves a thermal efficiency of over 85%, reducing energy consumption by 40% compared to traditional gas kilns.

• Superior Off-gas Control: Multi-stage treatment ensures $HF$ emissions are <1 mg/m³ and particulate matter <10 mg/m³, satisfying ultra-low emission standards.

• Process Stability: Precise control within ±5°C and partitioned heating zones adapt to various battery chemistries (NCM, LFP, etc.). An intelligent anti-clogging system (ceramic coating + pulse cleaning) prevents kiln ringing, ensuring continuous operation for ≥720 hours.

• High Automation & Safety: PLC-based intelligent controls enable remote monitoring and self-diagnosis. The system is equipped with over-temperature alarms, pressure protection, and combustible gas monitoring.

• Strong Adaptability: Capable of processing various types of electrode scraps and black mass; the modular design facilitates easy maintenance and capacity expansion.

5.Technical Specifications

6.Our Solutions