The technological system of Henan Zhengzhou Mining Machinery Co., Ltd. in the field of waste lithium battery resource utilization demonstrates full-chain process innovation, from safe pretreatment to high-value metal deep purification. The technical highlights and market value can be analyzed from the following dimensions:
I. Closed-Loop Full-Process Technology Design
1.1 Safe Disassembly System
Discharge Process: Combines multi-stage physical discharge with chemical neutralization, ensuring residual cell voltage below 0.5V to eliminate short-circuit risks.
Oxygen-Free Crushing: Mechanical crushing under inert gas protection prevents electrolyte volatilization and explosions, while breaking batteries into 5-10mm uniform particles for subsequent processing.
1.2 Pyrolysis & Gasification Technology
High-Temperature Cracking: Conducted in an oxygen-free environment (600-800°C), decomposing PVDF binder, LiPF6 electrolyte, and other organics into CO₂, H₂O, and small hydrocarbons, with a cracking rate exceeding 98%.
Exhaust Gas Purification: Utilizes alkali spray + activated carbon adsorption dual-stage treatment, ensuring VOCs emissions<50mg/m³, compliant with "Battery Industry Pollutant Discharge Standards".
1.3 Intelligent Sorting System
Multi-Stage Sorting:
Screening: Gradient vibrating sieves (0.5-5mm mesh) for precise particle classification.
Magnetic Separation: Rare-earth permanent magnet rollers (≥1.2T magnetic field) remove iron impurities with 99.5% purity.
Air Separation: Variable-frequency controlled airflow (12-25m/s) separates black mass from metal particles.
Gravity Separation: X-ray transmission+ gravity sorting, achieving >97% recovery rate for copper/aluminum.
1.4 Granulation & Purification Process
Fine Crushing: Vortex pulverizer + liquid nitrogen cryogenic embrittlement, controlling particle size to 50-200μm.
Spherical Granulation: Centrifugal spray drying produces high-flowability spherical particles (D50=80μm), meeting precursor requirements for lithium battery cathode materials.
Black Mass Purification: Hydrometallurgy + pyrometallurgical roasting, recovering cobalt, nickel, and manganese at 99.8% purity, with lithium recovery >85%.
II. Technological Innovation & Market Competitiveness
2.1 Integrated Equipment Advantages
Modular production lines with single-line capacity of 500kg/h, 40% more efficient than traditional methods.
Energy self-circulation system recovers waste heat from pyrolysis, reducing energy consumption by 30% per ton.
2.2 Environmental & Cost Efficiency
Waste electrolyte recycling extracts lithium carbonate (purity ≥98%).
Oxygen-enriched side-blown roasting cuts carbon emissions by 30%.
III. Industrialization Prospects
Market Adaptability: Compatible with NCM, LFP batteries, and prismatic/cylindrical/soft-pack cells.
Economic Feasibility:
Processing cost: ~¥8,000/ton.
Revenue from black mass (12% cobalt, ~¥200,000/ton) + metal recovery yields 28% gross profit margin.
Policy Alignment: Complies with "New Energy Vehicle Power Battery Recycling Regulations", qualifying for government pilot projects.
Henan Zhengzhou Mining Machinery has established a "safe-efficient-clean" technological closed loop, enabling precise recovery of lithium, cobalt, nickel, and other strategic metals while achieving cost advantages through integrated equipment and process innovation. This system provides critical support for the full lifecycle management of power batteries and has matured from lab-scale to industrial-scale applications, positioning it as a benchmark solution in lithium battery recycling.
