Custom High-Intensity Hematite Permanent Magnetic Pulley Roller for Conveyor Belt

The AstraRoll Technical Advantage

Engineering a permanent magnetic pulley capable of capturing weakly magnetic ores requires advanced magnetic circuit modeling and heavy-duty mechanical reinforcement:

Ultra-High Magnetic Gradient Architecture (超强磁场梯度优化磁路): Capturing hematite requires more than just high magnetic flux; it demands an intense magnetic field gradient. AstraRoll engineers utilize finite element magnetic simulation to assemble high-energy NdFeB blocks into a proprietary crowded-pole array. This projects a dense, ultra-high-gradient field reaching up to 15,000 Gauss directly through your conveyor belt to firmly grip fine and coarse hematite particles.

Dry Pre-Concentration Efficiency: By rejecting 20% to 50% of coarse waste rock (gangue) immediately after primary or secondary crushing, our magnetic pulleys drastically reduce the volume of barren material sent to your grinding circuit. This significantly extends ball mill liner life, reduces water and power consumption, and maximizes overall processing plant capacity.

Permanent Magnetism & Zero Energy Costs: Unlike electromagnetic rollers that consume continuous electrical power and suffer from field decay due to coil overheating, AstraRoll permanent magnetic pulleys require zero electricity to generate their magnetic field. We guarantee a magnetic force loss of less than 1% over a 10-year operational period.

Heavy-Duty Armored Construction: Mining environments subject equipment to brutal impact and abrasion. The rare-earth magnetic core is hermetically enclosed within a thick-walled, non-magnetic stainless steel shell. Seamlessly welded and reinforced, it withstands the continuous pounding of coarse crushed rock without denting or allowing dust and moisture to degrade the magnets.

Primary Applications

AstraRoll High-Intensity Hematite Magnetic Pulleys are engineered for high-tonnage dry beneficiation across the global mining sector:

Iron Ore Beneficiation: Dry pre-concentration and waste rejection (cobbing) of hematite, specularite, limonite, and siderite ores prior to fine grinding.

Manganese & Weakly Magnetic Minerals: Upgrading rhodochrosite, pyrolusite, and chromite ores by removing non-magnetic silicate and carbonate gangue rock.

Slag & Tailings Recovery: Extracting valuable weakly magnetic metallic alloys and iron-bearing minerals from steel furnace slag and historical mine tailings.

Industrial Minerals Purification: Removing fine, weakly magnetic iron oxide and titanium impurities from quartz, feldspar, nepheline, and kaolin clays to achieve high-purity grades.

Key Specifications

Please note: Every AstraRoll Hematite Magnetic Pulley is custom-engineered based on your ore feed size, belt speed, and tonnage requirements.

Outer Diameter (O.D.): Custom from 300mm up to 1,200mm+.
Face Length: Custom manufactured from 500mm up to 2,500mm+.
Surface Magnetic Intensity: 10,000 GS to 15,000 GS (1.0 Tesla to 1.5 Tesla).
Magnetic Material: Sintered Rare-Earth NdFeB (Neodymium Iron Boron).
Optimal Feed Particle Size: 0.5mm to 75mm (depending on pulley diameter and magnetic circuit).
Shell Material: Non-Magnetic SUS304 or SUS316L Stainless Steel.

Why Choose AstraRoll?

1. Ore Specificity & Trajectory Engineering 

Hematite separation depends heavily on balancing centrifugal force against magnetic retention force. If your conveyor belt runs too fast, centrifugal force will throw the weakly magnetic hematite off the belt before the magnet can pull it into the concentrate chute. AstraRoll provides full engineering support: we evaluate your ore's specific magnetic susceptibility, grain size distribution, and belt speed (m/s) to design the exact pulley diameter and magnetic pole pitch required to achieve a clean physical split between concentrate, middlings, and waste rock.

2. Turnkey Drop-In Replacement

Upgrading your crushing plant to automated dry pre-concentration does not require redesigning your conveyor structure. As a dedicated Hematite Magnetic Separator Roller Manufacturer, we precision-machine the mounting shafts, bearing journals, and drive keyways to match your current head pulley's exact engineering drawings. Your maintenance crew can seamlessly drop the AstraRoll hematite separator directly into your existing conveyor frame during a standard shutdown.

Q1. Are you a trader or direct factory?

We are a direct manufacturing factory with over 20 years of expertise in high-end industrial rollers, casters and material handling solutions. Our facility operates with ISO-certified quality management systems, allowing us to maintain full control over production cycles and quality standards. Throughout two decades of growth, we have established deep, long-term strategic partnerships with several listed companies and global automation leaders, proving our reliability as a high-tier industrial supplier.

Q2. What are your main products?

AstraRoll specializes in the engineering and production of three core product lines: Industrial Rollers, Heavy-Duty Wheels, and Precision Casters. We do not just sell components; we provide integrated movement and transport solutions. Our products are widely utilized across high-demand sectors, including: New Energy, Lithium Battery, Mining, Heavy Industry, Medical Institutional, Agriculture and Logistics.

Q3. What about delivery time?

We deeply understand that project timelines are critical.
Standard Products: Usually dispatched within 7–15 working days if the components are in stock.
Customized/OEM Orders: Depending on the complexity and volume, the lead time typically ranges from 20–35 days. This includes time for technical drawing confirmation, specialized tooling, and rigorous pre-shipment testing.
Shipping Methods: We offer flexible global logistics solutions, including FOB and CIF terms. We ship via Sea Freight (for bulk industrial orders), Air Freight (for urgent project needs), and International Express (DHL/FedEx/TNT) for smaller components or samples.

Q4. How can I get a quote for customized products?

Since a significant portion of our business involves specialized engineering, pricing is tailored to your specific technical requirements. To provide an accurate quote, please provide the following details: Technical Drawings or Sketches, Application Environment, Quantity, Special Requests. Our engineering team typically reviews and responds to custom inquiries with a formal quotation within 24–48 hours.

Q5. What is your payment?

TT / Paypal / Western Union / LC / Credit Card etc. are all available to us.