The JSGX multi‑rotor vortex modification mill by JACAN is the preferred continuous equipment for ATH surface modification, perfectly matched to the full ATH production line after air classification. Unlike batch high-speed mixers, it runs continuously, maintains stable high coating efficiency, and strictly controls temperature to protect ATH crystal water and flame-retardant properties.
Why JSGX is the best choice for continuous ATH modification
1. Multi-stage vortex de-agglomeration and uniform coating
JSGX adopts a three-rotor sequential turbulent chamber design. The first rotor breaks ATH micro-agglomerates before modifier injection, so the modifier coats individual particles instead of only the outer shell of agglomerate clusters. Atomized silane or stearic acid is sprayed into the high-turbulence zone. Repeated particle collision and shear spread the modifier into a thin uniform film.
- Coating efficiency: stably ≥95% for silane-modified cable-grade ATH; 94–97% for stearic acid-modified ATH.
2. Low-temperature mechanochemical modification, protecting ATH
Heat comes mainly from particle friction and rotor shear, not external heating. Multi-point temperature sensors are installed in each chamber, with interlock protection to cap material temperature below 110 °C. This prevents ATH crystal water decomposition and avoids loss of flame retardancy or whitening decline. The operating window can be tuned for silane (90–100 °C) or stearic acid (85–95 °C).
3. Fully continuous and automatically interlocked feeding system
Loss-in-weight screw feeder delivers stable classified fine ATH powder. A precision metering pump injects atomized modifier, and the modifier flow is automatically interlocked with powder feed rate to keep a fixed weight ratio. This eliminates batch-to-batch variation seen in batch mixers. The whole system runs under negative pressure to prevent dust leakage and condensation.
4. Anti-contamination options for cable-grade ATH
Ceramic rotors and ceramic liners are optional, minimizing iron contamination. This is critical for LSZH cable ATH where metal impurities degrade electrical insulation.
5. Easy integration into the complete ATH process line
It can be directly connected downstream of the air classifier mill:
Flash dryer → ACM grinding mill → Air classifier → JSGX modification mill → Cooling section → Cyclone & bag filter collection → Finished ATH powder.
Comparison with alternative modification equipment
- Batch high-speed mixer (discontinuous)
Pros: Low capital investment for small batches.
Cons: Coating coverage only 85–92%; inconsistent residence time; temperature spikes hard to control; low throughput; labor-intensive. Not suitable for large-scale continuous ATH production. - Single-stage vortex modification mill
Pros: Continuous operation.
Cons: Only one mixing chamber; weaker de-agglomeration; coating uniformity drops for ultrafine ATH. - Pin mill / turbo modification mill
Pros: Strong shear.
Cons: Harder to control residence time; higher heat generation risk; less optimized for low-temperature ATH processing.
Key operational requirements for JSGX
- Incoming ATH free moisture: 0.2–0.5% to avoid re-agglomeration
- Modifier atomization check: clean nozzles to prevent large droplets
- Rotor speed tuning: balance de-agglomeration and heat generation
- Post-cooling section: reduce powder temperature after modification to stop modifier migration
For large-scale continuous production of surface-modified ATH, the JSGX multi-rotor vortex modification mill is the best equipment. It delivers high and stable coating efficiency, precise low-temperature control, optional ceramic anti-contamination configuration, and seamless integration with upstream drying, grinding and classification systems. It produces consistent silane or stearic acid treated ATH for LSZH cables, plastics and artificial stone.
