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SM 32x500 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130374

GTIN: 5906301813224

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

500 mm

Weight

2670 g

1 488.30 ZŁ with VAT / pcs + price for transport

1 210.00 ZŁ net + 23% VAT / pcs

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SM 32x500 [2xM8] / N42 - magnetic separator

Specification/characteristics SM 32x500 [2xM8] / N42 - magnetic separator

properties

values

Cat. no.

130374

GTIN

5906301813224

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

32 mm [±0,1 mm]

Height

500 mm [±0,1 mm]

Weight

2670 g [±0,1 mm]

Manufacturing Tolerance

± 0.1 mm

Magnetic properties of material N42

properties

values

units

coercivity bHc ?

860-955

kA/m

coercivity bHc ?

10.8-12.0

kOe

energy density [Min. - Max.] ?

318-334

BH max KJ/m

energy density [Min. - Max.] ?

40-42

BH max MGOe

remenance Br [Min. - Max.] ?

12.9-13.2

kGs

remenance Br [Min. - Max.] ?

1290-1320

actual internal force iHc

≥ 955

kA/m

actual internal force iHc

≥ 12

kOe

max. temperature ?

≤ 80

°C

Physical properties of NdFeB

properties

values

units

Vickers hardness

≥550

Density

≥7.4

g/cm³

Curie Temperature TC

312 - 380

°C

Curie Temperature TF

593 - 716

°F

Specific resistance

150

μΩ⋅Cm

Bending strength

250

Mpa

Compressive strength

1000~1100

Mpa

Thermal expansion parallel (∥) to orientation (M)

(3-4) x 106

°C^-1

Thermal expansion perpendicular (⊥) to orientation (M)

-(1-3) x 10-6

°C^-1

Young's modulus

1.7 x 104

kg/mm²

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The main mechanism of the magnetic separator is the use of neodymium magnets, which are welded in a casing made of stainless steel usually AISI304. As a result, it is possible to efficiently segregate ferromagnetic elements from other materials. An important element of its operation is the use of repulsion of magnetic poles N and S, which causes magnetic substances to be collected. The thickness of the embedded magnet and its structure pitch affect the power and range of the separator's operation.

Generally speaking, magnetic separators are used to separate ferromagnetic particles. If the cans are ferromagnetic, the separator will effectively segregate them. However, if the cans are made of non-ferromagnetic materials, such as aluminum, the magnetic separator will not be effective.

Yes, magnetic rollers find application in the food sector to remove metallic contaminants, such as iron fragments or iron dust. Our rollers are made from acid-resistant steel, EN 1.4301, suitable for contact with food.

Magnetic rollers, otherwise magnetic separators, find application in food production, metal separation as well as recycling. They help in eliminating iron dust during the process of separating metals from other materials.

Our magnetic rollers consist of a neodymium magnet anchored in a stainless steel tube cylinder made of stainless steel with a wall thickness of 1mm.

Both ends of the magnetic bar will be with M8 threaded holes - 18 mm, which enables simple mounting in machines or magnetic filter drawers. A "blind" version is also possible in manual separators.

In terms of features, magnetic bars stand out in terms of flux density, magnetic force lines and the area of operation of the magnetic field. We produce them in materials, N42 as well as N52.

Generally it is believed that the greater the magnet's power, the more efficient it is. But, the value of the magnet's power depends on the height of the used magnet and the quality of the material [N42] or [N52], as well as on the area of use and expected needs. The standard operating temperature of a magnetic bar is 80°C.

When the magnet is thin, the magnetic force lines are more compressed. Otherwise, in the case of a thicker magnet, the force lines will be extended and extend over a greater distance.

For making the casings of magnetic separators - rollers, usually stainless steel is used, particularly types AISI 304, AISI 316, and AISI 316L.

In a saltwater contact, AISI 316 steel is highly recommended thanks to its outstanding anti-corrosion properties.

Magnetic rollers are characterized by their unique configuration of poles and their capability to attract magnetic substances directly onto their surface, as opposed to other devices that may utilize complex filtration systems.

Technical designations and terms related to magnetic separators comprise among others magnet pitch, polarity, and magnetic induction, as well as the type of steel used.

Magnetic induction for a magnet on a roller is measured using a teslameter or a gaussmeter with a flat Hall-effect probe, seeking the highest magnetic field value close to the magnetic pole. The result is checked in a value table - the lowest is N30. All designations below N27 or N25 suggest recycling that falls below the standard - they are not suitable.

Neodymium magnetic bars offer many advantages, including higher attracting power, longer lifespan, and effectiveness in separating fine metal particles. However, some of the downsides may involve the requirement for frequent cleaning, greater weight, and potential installation difficulties.

By ensuring proper maintenance of neodymium magnetic rollers, it is recommended regularly cleaning them from deposits, avoiding extreme temperatures up to 80°C, and shielding them from moisture if the threads are not sealed – in ours, they are. The rollers our rollers have waterproofing IP67, so if they are leaky, the magnets inside can oxidize and weaken. Testing of the rollers should be carried out once every 24 months. Care should be taken, as there is a risk getting pinched. If the protective tube is only 0.5 mm thick, it may wear out, which in turn could cause problems with the magnetic rod seal and product contamination. The range of the roller is equal to its diameter: fi25mm gives an active range of about 25mm, while fi32 gives an active range of about 40mm.

A magnetic roller is a magnetic separator made from a neodymium magnet enclosed in a cylindrical stainless steel housing, which are used to remove metal contaminants from bulk and granular materials. They are used in the food industry, recycling, and plastic processing, where metal separation is crucial.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

They do not lose strength over time - after about 10 years, their power decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic field,
By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
They have exceptionally high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve significant thermal resistance, allowing them to operate at temperatures up to 230°C and above...
Thanks to the flexibility in shaping or the ability to adapt to specific requirements – neodymium magnets can be produced in various forms and dimensions, which amplifies their universality in usage.
Wide application in modern technologies – find application in computer drives, electric drive mechanisms, medical apparatus and very highly developed apparatuses.

Disadvantages of neodymium magnets:

They are prone to breaking as they are extremely fragile when subjected to a strong impact. If the magnets are exposed to impacts, it is suggested using magnets in a metal holder. The steel housing in the form of a holder protects the magnet from impacts and also increases its overall strength,
High temperatures can reduce the strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the shape and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
Due to their susceptibility to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
Health risk to health from tiny fragments of magnets pose a threat, in case of ingestion, which is crucial in the context of child safety. It's also worth noting that small elements of these magnets have the potential to complicate diagnosis when they are in the body.

Precautions

Neodymium magnets are highly delicate, they easily break as well as can crumble.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. At the moment of collision between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets can demagnetize at high temperatures.

Despite the general resilience of magnets, their ability to maintain their magnetic potency can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Keep neodymium magnets away from GPS and smartphones.

Magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are over 10 times stronger than ferrite magnets (the ones in speakers), and their strength can shock you.

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional disruption to the magnets.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Do not give neodymium magnets to youngest children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets are not recommended for people with pacemakers.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

Magnets may crack or crumble with uncontrolled joining to each other. Remember not to move them to each other or have them firmly in hands at a distance less than 10 cm.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Pay attention!

Please read the article - What danger lies in neodymium magnets? You will learn how to handle them properly.