Spiral Jet Mill

The spiral jet mill is a classic ultrafine de‑agglomeration equipment for precipitated silica processing. Driven by high‑pressure gas flow, it breaks hard agglomerates of spray‑dried silica down to target fineness with narrow particle‑size distribution. Featuring simple structure, no rotating classification components, and easy disassembly, assembly and cleaning, it is suitable for medium‑and‑low‑capacity silica production lines, R&D trials, and frequent material‑change scenarios. The wear‑resistant ceramic lining eliminates metal contamination. It can be combined with a precision air classifier and closed‑loop conveying system to form a complete full‑dry‑process silica production line.

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Spiral Jet Mill

How It Works

Technical breakdown of the core processes and technology behind Spiral Jet Mill.

High‑pressure compressed air is tangentially injected into the spiral annular grinding chamber through multiple nozzles to generate high‑speed spiral circulating gas flow. Spray‑dried silica powder is fed into the chamber via a feeding screw and immediately accelerated by the high‑velocity spiral gas stream. Silica particles circulate at ultra‑high speed along the spiral path, generating intense inter‑particle collision, friction and shear to fully disperse and de‑agglomerate hard agglomerates. Qualified fine powder is carried out of the spiral chamber by upward central gas flow and sent to the turbo classifier for screening. Off‑spec coarse particles keep circulating inside the chamber for further processing until meeting specifications. The entire process relies purely on particle‑to‑particle collision without grinding media, effectively preventing metal contamination. The system operates under negative pressure to avoid silica dust leakage and secondary agglomeration.

Spiral Jet Mill

Technical Parameters

Spiral Jet Mill defines excellence through quantified data, meeting the most stringent requirements of high-precision material processing.

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Model Series: JSJM	01	02	03	06	10	20	30	40	60	80	100
Feeding size (mm)	<1	<1	<1	<1	<1	<2	<2	<2	<2	<2	<2
Particle size (D97: μm)	5~45	5~45	5~45	5~45	5~45	5~45	5~45	5~45	5~45	5~45	5~45
Processing capacity (kg/h)	0.02~0.1	—	1~10	5~30	10~20	50~500	100~800	200~1000	500~2000	1000~3000	4000~6000
Compressed gas consumption (m³/min)	1	—	3	6	10	20	30	40	60	80	100
Compressed air pressure (Mpa)	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1
Number of nozzles	5	4	6	6	8	12	16	—	—	—	—