Coal Processing
HENGJI MAGNETICS: Engineering Efficiency for Global Coal Operations
For over 20 years, HENGJI MAGNETICS has delivered precision magnetic solutions that safeguard equipment, maximize resource recovery, and transform waste into value across coal operations. Our engineered systems cut downtime by 90%, reclaim 99.8% of critical media, and achieve ≤50ppm iron purity – driving rapid ROI while advancing sustainability. Partner with us to optimize safety, profitability, and ESG compliance from extraction to tailings management.
I. Coal Extraction & Conveying
Defend critical assets from tramp iron damage:
• Suspension Magnets (RBCDB/RCYB):
▫ Remove detonators, wires & shovel teeth (≤35kg) from conveyors.
▫ 90% reduction in crusher jams and equipment damage.
• Permanent Drums (RCT):
▫ Head pulley-integrated 5,000 Gauss magnets extract ≥0.5kg tramp iron.
▫ Zero power | Minimal maintenance.
• Explosion-Proof Systems (Exd I Mb):
▫ Certified for methane-prone areas.
▫ 99% detonator capture | Eliminates ignition hazards.
II. Coal Washing & Processing
Optimize efficiency and product quality
• Dense Media Recovery (CTN):
▫ Reclaim 99.8% magnetite (coarse + fine powder) from slurry.
▫ 98% lower media loss (0.2kg/ton coal).
• Media Purification:
▫ Auxiliary suspension magnets boost purity to 99.5%.
• Coal Fines Cleaning (RCYG):
▫ Inline vertical traps reduce Fe in pulverized coal (0.1-1mm) from 500ppm to 50ppm.
▫ Meets blast furnace PCI specifications.
III. Waste Valorization & ESG
Convert liabilities into profit streams:
• Gangue Processing (GTC):
▫ Extract >45% FeS₂ pyrite from waste rock (¥80/ton value).
• Brick-Making Prep (RCYB):
▫ De-iron gangue feedstock → 98% product pass rate (no cracks).
• Tailings Water Recovery:
▫ Capture -0.074mm magnetite from effluent (92% efficiency).
▫ Enable closed-loop water reuse.
Proven Impact: Global Case Studies
Open-Pit Mine Conveyor Protection (China)：
• Challenge: 25kg metal fragments caused 5-8 monthly crusher failures ($170K/yr downtime).
• Solution: RBCDB-12T3 Flameproof Magnet (150mT, 35kg) + IP65 auto-clean system.
• Results:
✓ 95% fewer jams | 260% capacity increase
✓ Zero failures in 24 months
✓ $110K/year savings
Mega Coal Prep Plant (China)：
• Challenge: 1,200-ton/yr magnetite loss ($510K cost).
• Solution: CTN-1024 Dual-Drum Separator + RBCDB-10 Purification Magnet.
• Results:
✓ 99.8% media recovery (20 tons/yr loss)
✓ 99.5% purity → 70% fewer clogs
✓ $510K saved annually | ROI <6 months.