Permanent magnet overband magnet for mobile plant (OVAPEM)

In brief

• The permanent magnet overband magnet for mobile plant (OVAPEM) is installed crosswise above a conveyor to remove ferrous metals from the material flow.
• It is used in recycling and waste management, in ore processing and in temporary applications such as demolition sites.
• Its attraction distance is 500 mm. It weighs 850 to 1400 kg and suits conveyors 800 to 1400 mm wide.

permanent magnet, separation

• Applications
• Operating principles
• Operating tips
• General specifications
• Case studies

Applications

The permanent magnet overband magnet for mobile plant is used in several sectors:

• Recycling and waste management: in mobile sorting plants, the OVAPEM protects shredders and fine shredders by removing ferrous metals from wood, plastics and C&I (commercial and industrial waste) flows…
• Ore processing: in the mining industry, permanent magnet overband magnets separate unwanted ferrous items before the fine grinding stages.
• Temporary applications: demolition sites, site remediation or one-off events that require magnetic sorting.

Operating principles

How our permanent magnet overband magnets for mobile plant work:

The OVAPEM magnetic separator is installed crosswise above the conveyor carrying the materials to be sorted. Its position and suspension height are calculated from the throughput, the particle size and the belt speed.

• Magnetic extraction: the permanent magnet block generates a strong, constant magnetic field that passes through the material layer.
• Automatic discharge: the overband magnet belt, driven continuously by an electric or hydraulic motor, carries the captured ferrous metals to the discharge zone outside the magnetic field.
• Continuous operation: the process runs without interrupting the main material flow. The conveyor below keeps moving material while the overband magnet continuously removes ferrous contaminants.
• Settings and adjustments: the suspension height is set according to the required separation depth. The lower the overband magnet, the smaller the pieces it captures, but the higher the risk of carrying over non-ferrous material.

Operating tips

Advice from our Lenoir-Mec experts:

• Optimal positioning: set the suspension height between 200 and 500 mm according to the depth of the ferrous metals
  in the flow.
• Regular inspection: every month, check the tension and condition of the conveyor belt (wear, tears), the alignment of the drums and the correct operation of the drive motor.
• Periodic cleaning: every week, clean the belt and the drums to remove any residue.
• Adapting to the material flow: for flows with a high ferrous content (>5% by mass), reduce the belt speed of the main conveyor or increase the suspension height to avoid overloading the overband magnet.
• Choice of drive: choose the hydraulic drive for mobile plant without a reliable electrical supply. The electric version suits semi-mobile or fixed installations with a 400V supply available.

General specifications

The OVAPEM is designed for the constraints of mobile equipment:

• Magnetic performance: the 500 mm attraction distance allows ferrous pieces to be captured effectively
  even when buried deep in the material flow.
• Robust construction: the frame and main components are made of stainless steel, ensuring
  optimal resistance to wear, impacts and outdoor conditions.
• No energy consumption: permanent magnets (ferrite) and optional hydraulic drive.
• Easy integration: weighing between 850 and 1400 kg depending on size, the OVAPEM is easily installed on
  conveyors 800 to 1400 mm wide.
• Also available in a version for fixed conveyors: permanent magnet (OVAP).

Advantages

• Suited to mobile plant and demanding environments
• High performance-to-weight ratio
• Energy savings

Services

• Industrial commissioning assistance
• Spare parts stock
• Fast after-sales service response
• Equipment fleet monitoring and periodic performance checks

Frequently asked questions

What is the OVAPEM overband magnet used for?

The OVAPEM is a permanent magnet overband magnet for mobile plant that removes ferrous metals from wood, plastics and C&I waste flows to protect shredders and fine shredders. It is also used in ore processing and in temporary applications such as demolition sites.

How does the OVAPEM work?

It is installed crosswise above the conveyor. The permanent magnet block captures ferrous metals through the material layer, and the belt, driven by an electric or hydraulic motor, discharges them outside the magnetic field without interrupting the flow.

What are the dimensions and weight of the OVAPEM?

It weighs between 850 and 1400 kg depending on size and is installed on conveyors 800 to 1400 mm wide. The attraction distance is 500 mm.

Which drive should I choose for the OVAPEM?

The hydraulic drive is preferred for mobile plant without a reliable electrical supply. The electric version suits semi-mobile or fixed installations with a 400V supply.

How do I adjust and maintain the OVAPEM?

Set the suspension height between 200 and 500 mm according to the depth of the ferrous metals in the flow. Check the belt, drums and motor every month, and clean the belt and drums every week.

Technical data

Feature	Value
Optimal positioning	set the suspension height between 200 and 500 mm according to the depth of the ferrous metals
Adapting to the material flow	for flows with a high ferrous content (5% by mass), reduce the belt speed of the main conveyor or increase the suspension height to avoid overloading the overband magnet.
Choice of drive	choose the hydraulic drive for mobile plant without a reliable electrical supply. The electric version suits semi-mobile or fixed installations with a 400V supply available.
Magnetic performance	the 500 mm attraction distance allows ferrous pieces to be captured effectively
Easy integration	weighing between 850 and 1400 kg depending on size, the OVAPEM is easily installed on

Type	Attraction distance X (mm)	Cross-belt mounting (A magnets)	B shackle centre distance	C entraxe Ø16	D drum centre distance	E overall	Weight (kg)
OVAPEM 800	400	800	600	887	1240	1564	850
OVAPEM 1000	450	1000	700	1100	1453	1777	1050
OVAPEM 1200	500	1200	800	1312	1665	1989	1250
OVAPEM 1400	400	1400	900	1524	1877	2201	1400