alc ultrafine grinding is a precision mineral processing operation. Continuous tracking of key process, quality, equipment and safety data stabilizes product quality, cuts energy consumption and avoids unexpected downtime. Below are the critical data categories and indicators for talc grinding lines.
1. Raw Material Data
Raw talc properties directly determine grinding difficulty and final product performance.
- Feed particle size: D50, D97 of incoming talc ore
- Moisture content: High moisture causes agglomeration, material sticking and classifier blockage
- Whiteness value: Raw ore whiteness, impurity content (iron oxide, silica)
- Hardness and mineral composition, loss on ignition (LOI)
- Feed mass flow rate: Stable feeding is the foundation of consistent grinding
2. Product Quality Data (Core Tracking Items)
These indicators decide whether talc powder meets customer requirements for plastics, coatings, paper and cosmetics.
- Particle size distribution: D50, D97, D10, maximum particle size
- Specific surface area (BET)
- Whiteness and brightness
- Bulk density & tap density
- Moisture of finished powder
- Residue on sieve
- Heavy metal and free silica content
- Oil absorption value (critical for paint & plastic grade talc)
- Lamellar structure retention rate (ultrafine talc needs to keep sheet shape)
3. Grinding & Classification Process Parameters
Real-time operational data of mill and air classifier.
- Mill main motor current / power consumption
- Rotor speed of air classifier
- System air volume, air pressure, inlet air temperature
- Vent negative pressure inside grinding chamber
- Feeder speed
- Classifier wheel vibration value
- Temperature of grinding chamber and bearing temperature
- Cyclone and dust collector pressure difference
4. Energy & Consumption Data
For production cost analysis.
- Specific power consumption (kWh per ton of finished talc powder)
- Compressed air consumption (if jet mill adopted)
- Wear part consumption: liner, hammer, classifier blade service life
- Water consumption (if wet grinding is used)
5. Equipment Health Data
Prevent sudden breakdowns.
- Vibration of motor, mill body and classifier
- Bearing temperature, lubricating oil temperature and oil quality
- Current and temperature of all auxiliary motors
- Seal leakage status
- Blockage alarm records
6. Dust & Safety Data
Talc powder processing has dust handling requirements.
- Dust concentration in workshop and exhaust gas
- Grounding resistance for static elimination
- Dust collector differential pressure, filter bag status
- Workshop humidity
- Abnormal ignition source records
- Noise level
7. Production Statistics Data
- Hourly / daily output of qualified talc powder
- Yield rate (qualified product / total raw input)
- Unqualified product proportion and defect type
- Equipment operation rate, downtime duration and root cause
