Low Intensity Magnetic Separator

Low Intensity Magnetic Separator

Low Intensity Magnetic Separators are designed to separate ferrous materials from non-magnetic materials. The ferrous materials are usually impurities of varying particle size (from the micron level upto large pieces of tramp iron) and their extraction either improves the purity level of a bulk product or protects sensitive machinery (crushers, blades et.c) Separation techniques are also used in metal recycling to sort ferrous from non-ferrous material and for conveying cans in canning factories Service online

Detailed introduction

Introduction of Low Intensity Magnetic Separator

In the recent past the problem of removing the deleterious iron particles from a process stream had a few alternatives. Magnetic separation was typically limited and moderately effective. Magnetic separators that used permanent magnets could generate fields of low intensity only. These worked well in removing ferrous tramp but not fine paramagnetic particles. Thus high intensity magnetic separators that were effective in collecting paramagnetic particles came into existence. These focus on the separation of very fine particles that are paramagnetic. The current is passed through the coil, which creates a magnetic field, which magnetizes the expanded steel matrix ring. The matrix material being paramagnetic behaves like a magnet in the magnetic field and thereby attracts the fines. The ring is rinsed when it is in the magnetic field and all the non-magnetic particles are carried with the rinse water. Next as the ring leaves the magnetic zone the ring is flushed and a vacuum of about – 0.3 bars is applied to remove the magnetic particles attached to the matrix ring.

  • The heart of the magnetic separator is the magnet assembly. provides basically two different assemblies: High Capacity and High Gradient, (HG). The High Capacity assembly is the standard magnetic system. The main differences between the two magnet assemblies are pole pitch, pole sizes, and number of poles.
  • The Magnet assemblies are similar in design with both having a number of main poles and a number of intermediate cross poles for flux control and enhancement of the magnetic performance. The magnet poles are attached to a rigid steel yoke, which, in turn, is attached to the drum shaft.
  • The High Capacity assembly is comprised of six main poles and four intermediate poles, while the High Gradient Assembly has twelve main poles and eleven cross poles. A special magnet assembly is the DWHG, which consists of fourteen main poles and thirteen cross poles.
  • The High Capacity assembly has a higher magnetic flux rating but due to its inherently lower field gradient the magnetic attraction force is actually lower when compared with the High Gradient type.
  • The High Gradient version is hence more capable of recovering material, which is finer or less magnetic; however, its capacity is reduced as its magnetic force drops off faster as the distance increases from the magnets.
  • has been involved in magnetic separation for more than one hundred years.
  • has produced more than five thousand magnetic drums used in both dry and wet processing.
  • wet magnetic separators are continuously undergoing improvements to meet the everincreasing demands of our customers.
  • has been and is still the leader in the development of high capacity, high performance Wet Low Intensity Magnetic Separators (LIMS) for several decades.

Technical data

Model Max Feeding Size (mm) Feeding Concentration (%) Slurry Passing Through Capacity (m3/h) Capacity of Ore (m3/h) Power (kw) Weight (t)
ZGT-500 1.0 10-40 0.5-1.0 0.05-0.25 13.5 1.5
ZGT-750 1.0 10-40 0.1-2.0 0.1-0.5 22 3
ZGT-1000 1.3 10-40 12.5-20 4-7 28.6 6
ZGT-1250 1.3 10-40 20-50 10-18 35 14
ZGT-1500 1.3 10-40 50-100 20-30 44 20
ZGT-1750 1.3 10-40 75-150 30-50 62 35
ZGT-2000 1.3 10-40 100-200 50-80 74 50
ZGT-2500 1.3 10-40 200-400 100-150 94 105
Note: The magnetic strength should be determined in accordance with the nature of the ore. ZGT Series High Gradient Magnetic Separators can be customer-made.


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