With the rapid growth of the new energy industry and increasingly demanding lithium battery performance requirements, silicon-carbon anode materials, as a key component of high-performance lithium-ion batteries, are experiencing rapidly growing market demand.
As the key raw material for resin-based porous carbon, a precursor used in silicon-carbon anode materials, ultrafine phenolic resin microspheres directly influence the structural stability and electrochemical performance of the final carbonized product.
However, domestic production of phenolic resin microspheres still relies heavily on imports. Existing spray drying technologies also commonly face challenges such as poor particle dispersion and uneven particle size distribution. These limitations make it difficult to precisely control microsphere structures during subsequent carbonization, restricting further improvements in silicon-carbon anode material performance.
LONGXIN Smart's Ultra-High-Speed Centrifugal Spray Dryer: Overcoming Industry Challenges and Advancing Process Standards
Drawing on years of technical expertise, LONGXIN Smart has developed an Ultra-High-Speed Centrifugal Spray Dryer specifically designed to address the key challenges in phenolic resin microsphere production. The system enables efficient and high-precision production of ultrafine powder microspheres.
Patents: ZL 2021 2 2093525.2, ZL 2023 2 1168225.9, and 2020 1 0869088.6.
By combining ultra-high-speed centrifugal atomization with a multi-stage, gradient-controlled drying process, the system precisely controls the atomization particle size and drying rate of phenolic resin solutions, ensuring finished microspheres with a narrow particle size distribution, excellent sphericity, and superior flowability and dispersibility.
The centrifugal atomizer features a titanium atomizing disc with a maximum peripheral speed (Umax) of 226 m/s. Embedded ceramic particles enhance wear resistance and extend the service life of the atomizing disc.
Technical Advantages Driving Innovation in Domestic Manufacturing
The Ultra-High-Speed Centrifugal Spray Dryer enables precise control over the structure and functional properties of carbon microspheres, providing a solid foundation for subsequent carbonization into resin-based porous carbon and improving the performance of silicon-carbon anode materials.
1. Ultra-High-Speed Centrifugal Atomization System
Featuring a proprietary titanium alloy atomizing disc and high-precision dynamic balancing technology, the system overcomes conventional atomization speed limitations and achieves uniform distribution of micron-sized droplets, ensuring consistent microsphere particle sizes from the very beginning of the process.
2. Intelligent Temperature Control and Airflow Distribution
A multi-stage hot air distributor and PID-based intelligent temperature control system enable precise regulation of temperature and airflow fields inside the drying chamber, preventing microsphere adhesion and thermal decomposition caused by localized overheating.
3. Anti-Wall-Sticking Air Curtain Protection
An annular air curtain is formed along the inner wall of the drying chamber, effectively preventing material buildup and improving product yield while helping maintain product purity.
4. Functional Property Control
By adjusting atomization parameters and drying conditions, the system allows flexible control over key material properties, including porosity and specific surface area, meeting the customized requirements of different silicon-carbon anode material precursors.
Industrial Value: Enhancing Performance from Material Preparation to End Applications
According to performance evaluations conducted by leading industry companies, phenolic resin microspheres produced using LONGXIN equipment demonstrate significant improvements in the properties of the resulting resin-based porous carbon after carbonization.
1. Mechanical Performance
Improved compressive strength and thermal shock resistance help suppress structural damage caused by the volume expansion of silicon-based anode materials.
2. Electrochemical Performance
Key indicators, including initial discharge specific capacity and capacity retention after 500 charge-discharge cycles at a 1C rate, have reached advanced industry levels.
3. Production Efficiency
- Single-unit capacity: 50–200 kg/h (based on a solution with 20% solid content).
- Energy consumption: Approximately 10% lower than conventional equipment.
These advantages help customers achieve an optimal balance between production costs and material performance.
Our Mission: Driving the Localization of New Energy Materials Through Technological Innovation
As a leading developer of advanced drying equipment, LONGXIN Smart remains committed to the collaborative innovation of material processing technologies and equipment.
The industrial application of its Ultra-High-Speed Centrifugal Spray Dryer represents an important step toward reducing reliance on imported equipment for high-performance microsphere production. Through integrated innovation across equipment, process engineering, and material preparation, LONGXIN Smart is helping advance the domestic development of silicon-carbon anode materials and their manufacturing processes.
Looking ahead, LONGXIN Smart will continue to focus on the growing demand for intelligent and sustainable new energy material pro
