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Cleaning & Grading

CCP-1: Foreign Material Removal


Process Objective

Remove foreign material (stones, metal, weed seeds, broken seeds, dust) from raw flaxseed to achieve ≥ 99.9% purity before dehulling or milling.

Equipment Configuration

Raw Seed → Hopper → Magnet → Vibrating Screen → Aspirator → Destoner → Color Sorter → Clean Seed Silo

Equipment Specifications

Unit Type Model Capacity Power Notes
Magnet Permanent drum MD-1000 8 MT/hr 0.75 kW 10,000 Gauss; cleaned daily
Vibrating screen Plane gyratory VPS-1500 8 MT/hr 2.2 kW 4 decks: 4/2/1/0.5 mm
Aspirator Vertical air column AS-1200 8 MT/hr 5.5 kW Air velocity 4–6 m/s
Destoner Fluidised bed DS-800 5 MT/hr 3.0 kW Specific gravity separation
Color sorter Belt-fed, NIR + VIS CS-4C 3 MT/hr 6.0 kW 4 channels, 128 sensors

Performance Targets

Parameter Target Verification
Purity after cleaning ≥ 99.9% Every 2 hr grab sample
Stone removal 100% at ≥ 1 mm Every shift
Metal removal 100% at ≥ 0.5 mm Magnet cleaning log
Broken seed loss < 1% Weight balance
Dust emission < 10 mg/m³ Continuous monitor

Maintenance

  • Magnet cleaning: every 4 hours
  • Screen replacement: every 500 operating hours
  • Color sorter calibration: weekly (quartz reference)
  • Full sanitation: weekly

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