New Teardrop Tube Magnet from Bunting

Teardrop Shaped Magnet Eliminates Product Bridging

Bunting has developed a new design of Rare Earth Tube Magnet for use in removing fine iron from dry powders.  The Teardrop Tube Magnet retains the high surface magnetic field of 12,000 gauss, but the shape prevents fine powder from building up on the surface.Bunting Teardrop Tube Magnet

Tube Magnets are used extensively in the processing industry to capture magnetic susceptible foreign bodies, including screws, nuts, bolts, and small iron shards, in both dry and wet applications.  Metal Contamination causes damage to delicate processing equipment, as well as affecting the end-quality and purity of the product.  Tube Magnets are commonly used in the form of a Grate Magnet, where several Tubes form a Magnetic Separation grid.

Rare Earth Magnets are constructed out of Neodymium Iron Boron magnet slugs.  These produce the highest permanent magnetic field and are used to separate very fine iron and weakly magnetic stainless steel from solids and liquids.

Even though the Rare Earth Tube Magnet is a tube with a spherical circumference, fine non-magnetic material often builds up on the upper-most point of the Tube.  Over time this ‘bridging’ can increase and ultimately cause a blockage.  The build-up always reduces the separation performance, increasing the likelihood of metal contamination continuing through the process.

The new Teardrop Magnet has the point of the tear orientated into the product flow.  The surface area on the point of the tear is very small and prevents fine powder collecting on the surface.  The powder then flows under gravity over the side of the Tube Magnet, with any magnetically susceptible materials attracted to the high magnetic force.  These magnetics migrate to the bottom of the Tube Magnet, where they are securely held away from the product flow.

Bunting Teardrop Tube Magnet

The new Teardrop Tube Magnet is available as a single Tube or as part of a multi-Tube Grate Magnet assembly.

For further information on the Teardrop Tube Magnet or Magnetic Separation equipment in general, please contact us on:

Phone: +44 (0) 1442 875081
Via the website

Overseas Exhibition Success at Exposolidos 2017

Distributor SMED Tecnica Hosts Bunting at Show in Barcelona Spain

“This was our second successful overseas show of 2017,” reported Dave Hills, our Head of Sales.

Dave spent last week (14-16th February 2017) with our Spanish distributor SMED Tecnica at the Exposolidos show in Barcelona, Spain.

Bunting at Exposolidos 2017
Bunting on the stand of Spanish distributor SMED at Exposolidos 2017 in Barcelona

Exposolidos is an international exhibition for the technology and processing of solids.  Held in Spain every two years, the show provides the idea platform to meet companies from across Southern Europe and Northern Africa.

Bunting at Exposolidos 2017“Being able to show and demonstrate our Magnetic Separators is really important,” explained Dave.  “When a client is asked to pull a steel washer off a Tube Magnet and they find it impossible due to the intense magnetic strength, no additional explanation is needed.  It is a simple, physical demo that just proves that we have some of the strongest permanent Magnetic Separators available anywhere in the world.”

Magnetic Separators was one of several types of solids handling processing equipment on show on the SMED Tecnica stand.

Dave is really excited by the opportunities in Spain.

“Solids handling crosses across such a diverse number of industries, such as food, pharmaceuticals, ceramics and many more.  We knew that there were opportunities, but attending the show and being on the stand with Jordi [Castells] and his team really highlighted the potential.”

Being on the stand also provided an opportunity to provide training.

“Just talking through a metal contamination problem and discussing possible solutions is perfect training.  We have designs of Magnetic Separators to suit a wide range of applications and at the show we were able to discuss the pros and cons of each one.”

Developing export business is a core marketing objective for Bunting Europe in 2017.

“We have had several years of sustained growth in export sales.  However, to maintain such growth you need to be out in the market place, supporting distributors and speaking to the local customers.  With all the Brexit negativity, this has never been more important,” said Dave.

For further information on Bunting’s range of Magnetic Separators and Metal Detectors, please contact us on:

Phone: +44 (0) 1442 875081
Via the website

Bunting at Exposolidos 2017

Recyclable Product Design is vital to meet Future Recycling Targets

Is Our Environmental Future Simply Down to Design?

Technology that enables the separation of one or more materials from another has been essential even before the industrial revolution.  The more recent global necessity for the reclamation, reuse and recycling of materials has driven equipment developers to develop a wide range of separation systems to separate and purify materials such as metal, plastic and glass.  Separation is achieved using magnetics, infrared, metal detecting coils and X-Ray.

However, irrespective of the ability of the separation technology, successful separation is governed by the proportion of liberation.  This means that materials that need to be separated are free from each other.

Liberation is an age-old problem and one originally encountered in the mining and mineral processing industry.  An ore would be mined and then crushed to liberate valuable minerals.  Separation would then occur using magnetic separation, density tables, screens and other such technology, and the ability to separate and produce clean, valuable ore would dictate the viability and life of the mining operation.

The recycling industry has adopted very similar technology, with a focus on segregation, liberation, and separation.  This applies to all sectors of recycling irrespective of the material being processed.  The complexity of the recycling process is dictated by the material, and therein lies the problem.Bunting Vulcanis--2

Separation technology will continue to evolve.  There are new systems to magnetically separation stainless steel and PCBs and sensor-based sorters can be tuned to achieve incredible levels of separation.  Even robotics technology is entering the separation field.

Nevertheless, near 100% separation is not possible without good liberation and, although the technology for crushing, shredding and granulating is excellent, the recycling industry needs some new thinking from the designers of the primary products.

Too often, products are designed with different materials for no other reason that aesthetics.  Packaging is a prime example and although there have been advances made (eg not having metal tops of plastic bottles), there needs to be a complete rethink with a focus on the recyclability of a product.  The eventual recyclability of a product should bear more weight in the design criteria of a product than the appearance.  Why use several different types of plastic in one packaging product when one will suffice?plastic-bottles

Clever and forward thinking product design will make separation at all stages of the process easier and improve recycling rates.  This is an manufacturing industry issue and action is needed before the Government decides to introduce complex and unworkable legislation.  Designers should work closely with the recycling industry to understand what materials can be separated and how.  Improved designs will potentially reduce the cost of processing, increase the viability of the recycling operations, and have a positive impact on our environment.

Implementing such fundamental changes to the way products are designed will enable countries to reach the EU recycling target of 65% before 2030.  However, whether product designers list recyclability as one of the primary specifications remains questionable.

For further information on the range of metal separation equipment available from Bunting Magnetics and Master Magnets, please contact us on:

Phone: +44 (0) 1442 875081
Via the website


Magnetic Separators at Exposolidos 2017 in Spain

Bunting Developing Business in Spain with SMED Tecnica

Bunting Magnetic Separators will be on display on the SMED Tecnica stand 507E at Exposolidos 2017 being held in Barcelona, Spain between 14th and 16th February.

“We like to support our distributors at their local events,” explained Dave Hills, our Head of Sales.

Exposolidos 2017, an exhibition for the Technology and Processing of Solids, is the leading trade fair in southern Europe specializing in the handling and processing of solids, bulk materials, dry powder, semi solids and solids-liquid separation.

At the show, SMED Tecnica will be displaying a range of Magnetic Separators used to remove ferrous and weakly magnetic stainless steel from solids, powders and liquids.  Bunting will also be launching a new design of Tube Magnet for powder applications.

“Being on the stand, with the SMED Tecnica team, will help me gain a better understanding of the Spanish market,” said Dave.  “We are also launching a new design of Tube Magnet specifically for powder applications.  We will be making the announcement at the show and will have one of the new Tube Magnets on the stand.”

SMED Tecnica supply solutions and equipment for the handling of granules, tablets, flakes, liquids, and semi-solids.

Bunting’s range of Magnetic Separators and Metal Detectors for removing metal contamination from solids and liquids include:

Bunting Magnetics In Line Magnet-25

“Our [Bunting Magnetics Europe] success in 2016 was based upon developing our distributor network and export business.  Supporting our local representatives at important exhibitions is key.  It gives us the opportunity to learn about the market, whilst also providing support and training on products and applications,” explained Dave.

For further information on Bunting’s range of Magnetic Separators and Metal Detectors, please contact us on:

Phone: +44 (0) 1442 875081
Via the website

Plate Magnets Bunting Magnetics-9797


Bunting Europe Joins British Plastics Federation

BPF Important for Bunting’s Continued Growth

Bunting Magnetics Europe Ltd has joined the British Plastics Federation (BPF).

“Supplying Magnetic Separators and Metal Detectors into the Plastics sector is one of the cornerstones of our business and we felt that it was important to join the UK industry’s leading representative body,” explained Dave Hills, our Head of Sales.

Established in 1933, the British Plastics Federation is the most powerful voice in the UK plastic industry with over 500 members across the plastics industry supply chain, including polymer producers and suppliers, additive manufacturers, recyclers, services providers, end users, plastics processors and machinery manufacturers, representing over 80% of the industry by turnover.

“The Bunting Global group of companies has a strong history of developing metal separation solutions for the plastics sector,” said Dave Hills.  “In the past 12 months, Bunting Europe has had stands at the international K2016 plastics show in Germany, Plast Eurasia in Turkey, ProPak in South Africa, and at Arabplast in Dubai.”bunting_at_k2016-2

“This year we are already booked a stand at Interplas (NEC, Birmingham, UK 26-28 September 2017) and will be supporting our local representatives at other regional plastics shows in France and the Netherlands.”

The BPF has strong overseas links and provide support to companies seeking to develop export business.

Bunting has reported on several Magnetic Separator and Metal Detector installations in the plastics industry including:

Perfect Plastics Plant

Bunting also produced a guide on the best locations for Magnetic Separators and Metal Detectors in a Plastics Production Process.

“We are looking forward to being part of a fantastic organisation that can help us expand our business in the plastics sector,” said Dave Hills.

For further information on Magnetic Separators and Metal Detectors used in the Plastics sector, please contact us on:

Phone: +44 (0) 1442 875081
Via the website

You Can Block a Magnetic Field

8th of 10 Magnetic Separation Myths

A common question asked by users of Magnets and Magnetic Separators is whether a Magnetic Field can be blocked in the same way that lead blocks radiation.  This can be an important issue when considering the location of a Magnetic Separator and whether it is near instrumentation, control panels, or is in an area freely accessible by employees.

The simple answer is that it is not possible to totally ‘block’ a magnetic field.  The essence of a magnet, as determined by nature, is that magnetic field lines must terminate on the opposite pole and, therefore, there is no way to stop them.


However, often it is necessary to protect equipment from magnetic fields and this is achieved by re-routing the magnetic field.  This is otherwise known as ‘Magnetic Shielding’ and is achieved by casing the equipment requiring protection inside a structure that is made from or comprises of a material that has a very high magnetic permeability such as steel.  The magnetic field then flows along such that material, channeling the lines of magnetic field away from the components that require protecting, such as delicate electronics.

Not being able to completely block a Magnetic Field also causes difficulties for transporting Magnetic Separators and Magnetic Assemblies.  Many overseas customers ask if a particular Magnetic Separator can be transported by air.  Due to the inherent safety risk, there are strict regulations on how magnetically charged equipment and components can be transported due to concerns about interference with aircraft instrumentation.  Although such interference is extremely unlikely (due to most magnets having very shallow fields that do not even extend out of their packaging) there are guidelines that state:

  • Where possible the magnets are positioned with the north pole next to another’s south pole;
  • Thin sheets of steel are packed around the magnets in order to shunt the magnetic field and restrict it from penetrating outside of the box.  .

These guidelines are often possible to follow for small Magnets and Magnetic Separators, however transporting larger Magnetic Separators can very difficult and, if possible at all, exceptionally expensive.bunting-vulcanis-1139-2

This technique of channeling magnetic fields is actually used when designing Magnetic Separators such as the Overband Cross Belt Magnet, where magnetised blocks inside a stainless steel case have a thick steel backbar welded on one side to force the magnetic field to project away and in one direction.  This is a positive way of channeling the magnetic field to achieve the specific objective of picking up steel and magnetically susceptible materials.

For further information on Magnetic Fields and Magnetic Separators, please contact us on:

Phone: +44 (0) 1442 875081
Via the website

Other Magnetic Myths reviewed in this series include:

  1. Should You Always Use the Strongest Magnet?
  2. All Rare Earth Magnets are not the Same;
  3. The Highest Gauss Magnet is not always the Best;
  4. Stainless Steel Isn’t Magnetic, or is it?;
  5. Do Magnets Lose Strength Over Time?
  6. Is a Magnetic Field Uniform Across the Surface of a Tube Magnet?
  7. We Guarantee 100% Metal Separation