Sulfur powder is fine, dry and highly prone to static accumulation. Static sparks easily trigger dust fires and explosions, so targeted static elimination measures must be adopted in the whole production process.
1. Strict Grounding and Equipotential Bonding
- Fully ground all production equipment: grinders, sieves, conveyors, silos, mixers and dust collectors.
- Connect all separated metal parts with conductive wires to realize equipotential bonding, keep ground resistance below 10Ω.
- Ground metal pipes, hoppers and packaging containers to eliminate floating static charge.
2. Control Workshop Environmental Humidity
- Keep relative humidity of production workshop at 45% – 65%.
- Use industrial humidifiers appropriately; higher humidity reduces static generation on sulfur powder surface.
- Avoid dry air circulation which aggravates static accumulation.
3. Adopt Anti-Static Production Materials
- Use anti-static rubber pipes, anti-static conveyor belts and anti-static cloth bags for material conveying.
- Replace ordinary plastic accessories with conductive plastic or non-sparking alloy parts.
- Select anti-static filter bags for dust collection systems.
4. Personnel Static Protection Management
- Require all operators to wear anti-static work clothes, anti-static shoes and anti-static gloves.
- Set static discharge piles at workshop entrances for staff to release body static before entering operation area.
- Forbid wearing chemical fiber clothes which are easy to generate static electricity.
5. Optimize Production Process to Reduce Static Generation
- Slow down feeding, discharging and conveying speed to reduce friction and collision of sulfur powder.
- Adopt closed and mild feeding mode to avoid strong airflow stirring dust.
- Prioritize wet grinding or semi-wet processing to reduce dry dust static friction.
6. Install Professional Static Elimination Devices
- Mount static eliminator ion bars at discharge ports, screening outlets and packaging stations.
- Install static elimination brushes on the inner wall of silos to remove accumulated static charge of powder.
- Equip static online monitoring alarm devices in key hazardous areas.
7. Standardize Operation and Cleaning Rules
- Prohibit using dry cloth to wipe equipment and dust, avoid static friction.
- Use grounded explosion-proof vacuum cleaners for dust cleaning, never blow dust with compressed air.
- Avoid rapid dumping and violent stirring of sulfur powder.
8. Regular Inspection and Daily Maintenance
- Check grounding lines, bonding points and anti-static facilities regularly to prevent loose connection and aging failure.
- Test ground resistance and static elimination effect monthly.
- Timely replace failed anti-static accessories and aging conductive parts.
Core Principle
Cut off static generation paths, accelerate static release, eliminate static accumulation, and prevent static discharge sparks from contacting sulfur dust clouds.
