Pre-sieve raw sulfur
Remove large lumps, hard impurities and foreign materials before feeding to avoid uncrushable coarse particles entering the grinding system.
Adopt closed-circuit circulating grinding
Send all unqualified coarse oversized particles back to the grinding chamber for re-crushing, avoid direct outflow of coarse grains.
Adjust turbo classifier parameters
Raise classifier rotor speed properly to lower classification cut point, intercept all particles over target size (10μm). Match secondary dispersion air to disperse agglomerates fully.
Stable and low-speed uniform feeding
Avoid over-feeding which causes insufficient grinding; constant feeding ensures full impact and shear crushing of sulfur materials.
Strict low-temperature process control
Keep grinding temperature below 80°C to prevent sulfur softening, melting and agglomeration that form false oversized particles.
Optimize grinding airflow & pressure
Reasonably set circulating air flow and wind speed to ensure fine particles separate smoothly, prevent coarse powder from being carried out prematurely.
Eliminate static adhesion
Keep full system grounding and proper humidity, reduce sulfur powder static sticking, avoid aggregated big particle clusters.
Check and maintain equipment gaps
Regularly inspect mill liner, hammer gap and classifier clearance, prevent enlarged gaps leading to incomplete crushing.
Real-time particle size monitoring
Track finished powder particle size continuously, adjust classifier speed and feeding amount timely once oversized particles appear.
Full inert atmosphere operation
Keep oxygen below 2% to avoid sulfur oxidation hardening, which will increase particle hardness and difficult crushing.
