JACAN TECH
Main Processes
For Graphite Processing of Lithium Battery Anodes
Graphite processing for lithium battery anodes generally involves four steps: first, raw material pretreatment with purification and impurity removal; second, crushing and shaping to form suitable particle sizes; third, spheroidization modification to create high-sphericity particles; finally, precision classification, impurity removal and drying to produce graphite raw materials meeting the performance requirements of lithium battery anodes.
Raw Material Pretreatment
High Purity: Purified to over 99.9% via acid method.
Moisture Control: Uniformly dried to ≤0.5% moisture content.
Standardization: Precise sieving to ensure consistent material purity and indicators.
Grinding and Shaping
Particle Sizing: Precision grinding to 10-50μm using jet and pin mills.
Edge Optimization: Removal of sharp edges for optimal near-spherical prototypes.
Consistency: Strictly controlled distribution to lower energy consumption.
Spheroidization Modification
High-Speed Impact: Advanced rounding via centrifugal/airflow spheroidizer.
Surface Density: Achieving a high sphericity of ≥0.85.
Compatibility: Specialized surface modification for superior electrolyte compatibility.
Classification and Post-treatment
Precision Sorting: Air classifier technology for strict particle size control.
Iron Removal: Magnetic separation ensuring iron content ≤50ppm.
Final Quality: Secondary drying and thorough impurity removal for batch consistency.
JACAN TECH
Green Coke
Grinding and Shaping Process of Green Coke
D50: 6~18μm
The raw materials are crushed by a mechanical crusher into powder with a D50 particle size of 6~18μm.
Particle Shaping
The crushed powder is fed into a shaping and classification system equipped with a JCSM-WH shaping machine, where the particles are gradually shaped into a quasi-spherical form.
Precise Parameter Control
Precise control is carried out during the shaping process to make the material's particle size, tap density and other indicators meet the specific requirements of D10, D50 and D90.
Ultra-fine Classification
The system is equipped with an ultra-fine classifier, which can separate the ultra-fine particles generated in the shaping process in real time.
Supporting Equipment
Air Classifier Mill – Long Cavity
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Air Classifier Mill – Horizontal Heightened
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Calcined Coke
Grinding and Shaping Process of Calcined Coke
Primary Grinding
The raw materials are processed by a roller mill to produce powder with a particle size D50 of 6~18μm.
Precision Conveying
Ground materials are automatically conveyed to a professional system integrated with the JCSM-V shaping machine for subsequent processing.
Spherical Shaping
Powder particles are refined into near-spherical forms, with strict control over D10, D50, D90, and tap density to meet customer specifications.
Ultra-fine Classification
Integrated classifiers efficiently separate ultra-fine particles, preventing contamination and ensuring uniform particle size and final product quality.
Supporting Equipment
Ring Roller Mill
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Continuous Shaping System
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Natural Flake Graphite
Grinding, Classification, Shaping and Coating Process of Natural Flake Graphite
Raw Material Grinding
Natural flake graphite (90%-95% carbon) is pulverized using a JCSM710 mill. This process refines the raw material into micro-powder with a D50 of 21-23μm, establishing a uniform base for subsequent spheroidization.
Spheroidization and Shaping
The powder is processed via JCSM510 and JCSM410 systems to create spherical, potato-shaped particles. This mechanical shaping reduces the particle size to a D50 of 16-17μm, ensuring ideal morphology for battery applications.
Chemical Purification
The shaped semi-finished products undergo rigorous chemical purification. This critical stage removes impurities and elevates the carbon content to 99.95%-99.99%, meeting the high-purity standards required for high-performance materials.
Coating and Carbonization
Following re-shaping, the particles are surface-coated using specialized solvents and machinery. These coated materials then enter a graphitization furnace for high-temperature carbonization to enhance their electrochemical stability and performance.
Deagglomeration and Screening
Carbonized materials are deagglomerated to break up clusters and finely screened. After a strict quality inspection to verify all parameters, the finished products are packaged and ready for market delivery.
Supporting Equipment
Air Classifier Mill – Split-Axis Vertical
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Pin Mill Depolymerization System
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Pitch
Jet Milling and Classification Process for Pitch
System Design & Components
In artificial graphite production, pitch is a vital binder and coating agent. A specialized milling system, integrating a jet mill, dust collector, and induced draft fan, is engineered to handle these materials with high efficiency and precision.
Supersonic Fine Milling
Filtered, dry compressed air enters the chamber at supersonic speeds via Laval nozzles. Within the high-pressure stream intersection, pitch materials undergo intense, repeated collision, friction, and shearing to achieve the required ultra-fine particle size.
Centrifugal Classification
Milled particles are drawn upward by the induced draft fan into the classification zone. Driven by a high-speed rotating turbine's centrifugal force, the system effectively separates coarse and fine materials based on the specified size requirements.
Collection & Recirculation
Fine particles pass through the classifier into the cyclone and dust collector for final packaging. Conversely, unqualified coarse particles return to the milling chamber for cyclic re-milling until they meet the strict particle size standards.
Supporting Equipment
Air Classifier Mill – Split-Axis Vertical
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Fluidized Bed Opposed Jet Mill
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Global Project Highlights & Customer Sites
Real-world applications of our graphite and pitch processing lines. We provide customized, high-efficiency equipment for carbon material producers worldwide, ensuring seamless integration and reliable performance in demanding industrial environments.
