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Laboratory Magnetic Separators


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high gradient [Rare Earth NdFeB], high intensity, Permanent
Application Summary
Assessing feasibility of FLANMAG separation technology, Lab Scale testing for separation / upgrading of dry granular paramagnetic materials in place of traditional RERS technology

The FMLS Roll Separator is the laboratory scale version of the revolutionary patented FLANMAG roll separator.  

Essentially this separator eliminates the role and reliance of centrifugal force enhancing separation efficiency and increasing feed rate for a fraction of the cost. 

The FLANMAG roll separator is a two roll (head and tail) rare earth magnet assembly with thin (aramid Kevlar) conveyor belt, with a novel “placement” feed method to the primary roll and belt. With this method the material feed is separated into non-magnetic and magnetic fractions on initial roll impact, there is no middling fraction. The non-magnetic and magnetic fractions travel in opposite directions, no splitter plate required and only a single pass is usually required for complete separation. 

This laboratory scale test version of the FLANMAG permanent high intensity roll magnet device is intended for the separation and/or upgrading of dry granular paramagnetic material in the 75 microns to 1 mm size range.  

Conventional roll and drum magnetic separators use centrifugal and magnetic force to separate non-magnetic and magnetic particles from a material stream. The centrifugal force must be able to eject the non-magnetic particles, but at the same time not overcome the magnetic force holding the magnetic particles. Centrifugal force sets a limit on the separator feed rate and the separation efficiency. 

On the FLANMAG roll separator, the feed material falls from a hopper onto a ramp, it travels down the ramp and is placed on the magnet at a position which depends on the amount of magnetics in the feed. 

On contact with the tail roll magnet, the material is separated into non-magnetic and magnetic fractions. The non-magnetic component falls from the magnet (NM1) and the magnetic component is transferred by the rotation of the drum or roll until it is out of the influence of the magnetic field and continues along the conveyor belt until it reaches the second roll (head roll).  

Non-magnetics not rejected at the tail magnetic roll (NM1), are removed at the head magnetic roll (NM2). The second magnetic roll will separate feed material containing a high amount of magnetics, for example ilmenite in heavy mineral concentrate. The rotation speed is set to match the amount of the magnetic component. 

The benchtop FLANMAG laboratory roll separator is ideal for: 

  • Comparison performance & capacity testing versus conventional centrifugal rare earth roll separators 
  • Investigations into the purification or concentration of mineral samples deemed economically unfeasible by conventional roll separators 
  • Evaluation separation performance of plant scale rare earth roll separators 
  • Determination of the magnetic response of minerals. 
  • Separating weakly susceptible magnetic materials 
  • Mineral research, testing and analysis. 
  • Scoping full scale production equipment and flow sheet development  

Lightweight strong carbon steel frame  

AISI 304 Stainless Steel Feed Hopper, feeder tray, feed & product chutes  

Electromagnetic vibrating feeder 

Angle and position adjustable inclined feed chute 

Two products in three product chutes (magnetics, non-magnetics 1 & 2) 

Pot adjustable Roll VSD & vibratory feeder controller with digital output displays 

0.37 kW shaft mount geared motor for driven roll    

For single phase 110/240V power (50/60hz) 

Weight 130 kgs  

Two Rare Earth Head & Tail Rolls 

Supplied with aramid cloth [Kevlar] belt 0.125mm and polyurethane belt 1.2mm thick.