SEPARATION TECHNOLOGIES
FLS says its KREBS heavy-media cyclones are relatively inexpensive and typically require little operator attention or maintenance
as for larger sizes. The use of centrifugal force enhances separation of fine particles, which cannot be efficiently recovered using static heavy-media vessels. FLS says its heavy-media cyclones are relatively inexpensive and typically require little operator attention or maintenance. The large-diameter heavy-media cyclones accept larger top size material for efficient separation at higher feed rates within the mineral processing plant.
A thick ceramic tile lining is critical, as dense media can be very abrasive. At the inlet, FLS offers pre-engineered engineered ceramic components in two grades, with 25-38 mm thickness.“ We machine each pre-engineered tile in its‘ green’ state and fire the lot to create interlocking serialised liner components for extended wear life. The lower cone section and apex are protected by a heavyduty monolithic ceramic lining.”
KREBS heavy-media cyclones FLS says offer a more efficient and easy-to-operate alternative, handling top-size feed particles up to 102 mm and with capacities of 77 t / h to 894 t / h per cyclone.“ We work with you to understand the process challenges and ensure the correct equipment is selected, offering individual hydrocyclones and complete multi-unit Hydrocyclone clusters with isolation valves, pressure gauge( s), piping, launders, support structures, instrumentation, and other accessories.”
Magnetic separation – new SEV series from Eriez
Last year, Eriez announced the launch of its new SEV series of Suspended Electromagnets, representing a significant advancement in suspended electromagnet design. These units feature stronger magnets housed in smaller enclosures, reducing overall weight and installation costs while optimising performance efficiency.
Integrated into the Eriez SE7000 line, the new SEV models leverage cutting-edge wire and conductor technology to energise the magnet circuit, also requiring less coolant for operation. The new wire configuration, boasting an ultrathin anodised insulation layer, provides superior
thermal conductivity, ensuring high heat
dissipation within the circuit for improved magnet performance. Despite the compact size
, these magnets deliver performance that surpassess larger counterparts, guaranteeing
consistent and reliable operation.
Dave Heubel, Eriez Global Magnetics Product Manager, emphasises the practical benefits of the SEV series’ innovative design:“ As part of our commitment to continuous improvement, we’ ve succeeded in packing more magnet strength into a smaller footprint, thereby lowering costs and boosting productivity for customers through streamlined installations and more stable, dependab ble performance.”
Eriez also offers self-cleaning versions of all SEV models. Additionally, a variety of options are available, including dust hoods, coils derated for elevation, high fire point coolants, armour-clad belts and numerous other customisable features for every unique application.
Last year
, Eriez announced the launch of its new SEV series of Suspended Electromagnets
Bunting’ s new electromagnetic dry and wet filters
Bunting has developed a new Electromagnetic Dry Filter to remove free fine iron from powders. The high-intensity magnetic separator generates ultra-strong magnetic fields to capture ferrous particles present in difficult-to-process fine materials. The new technology enhances magnetic separation in a diverse range of applications including in mineral processing.
The Electromagnetic Dry Filter features a centrally-located vibrating canister inside a specially designed electromagnetic coil. The coil generates between 3,500 and 5,000 Gauss in the canister, which is then concentrated on the points of the matrix to reach peaks of up to 12,000 Gauss.
In operation, fine powder flows under gravity through the vibrating canister which is packed with magnetic stainless-steel matrix. Magnetic
particles are attracted to the magnetically induced matrix and held until the batch feed is stopped. The electromagnet is then turned off, releasing the magnetic particl es into a separate waste collection area, before processing is resumed.
The ultra-high magnetic fields and multiple magnetic capture points on the matrix enable enhanced separation of magnetically susceptible particles. The separation efficiency is far higher than permanent magnetic separators utilising permanent neodymium rare earth tube magnets. Many rare earth magnetic separators experience difficulties with bridging, ratholing and poor flowability due to particle size and shape, electrostatic charges, and environmental factors such as humidity.
The Electromagnetic Dry Filter is particularly suited for the magnetic particle purification of high-value fine powders, espe ecially when
processed and produced in controlled batches. The process times and integration of the
Electromagnetic Dry Filter into a production line
Bunting ' s new Electromagnetic Wet Filter has an ultra-high- intensity, background magnetic field
32 International Mining | APRIL 2025