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Wet Low Intensity Magnetic Separators (WLIMS)

$1.00 - 45,423.00

Designed for automatic, continuous recovery of magnetite or ferrosilicon in heavy media operations and concentration of ferrous and weakly magnetic ores

Model HMDA Wet Drum Separators improve the efficiency and reduce the costs of media recovery in heavy media operations.  Obsoleting the old "gauss at two inches" standard for selecting wet drum separators, Eriez engineers base their design and application on two fundamental factors: flux density and flux gradient within the separation area.


The variables affecting the collection of ferromagnetics in a wet drum magnetic separator are:

1. Magnetic field strength. The magnetic field strength must be sufficient to effectively collect ferromagnetic minerals.

2. Hydraulic capacity. Ferromagnetic recovery is directly related to the flowrate through the separator. As the flowrate increases, the slurry velocity and consequently the fluid drag force increases which tends to detach more magnetite particles from the opposing magnetic field.

3. Percent solids. The percent solids of the feed directly affects the selectivity of the separation. As the percent solids increases, the slurry becomes more viscous minimizing the effects of the fluid drag to assist in the separation of the silica.

4. Ferromagnetic content. Any given wet drum magnetic separator has the characteristic of removing a limited amount of ferromagnetics based on the diameter of the drum, peripheral speed, and the magnetic field strength.  This is referred to as the “magnetic loading”. Exceeding the limits of this magnetic loading will result in increased magnetite losses.
There are two distinct applications for wet drum magnetic separators. One application is the recovery of magnetite or ferrosilicon in a heavy media process. The other is the concentration and recovery of magnetite from iron ore.
Multiple voltage options available upon request.


Wet drums in heavy media applications provide continuous recovery of magnetite or ferrosilicon. Eriez has set the industry standards in the heavy media industry developing both the design cri- teria of the magnetic circuit and the benchmark of operation. The 750 gauss Interpole mag- netic element, developed by Eriez, is the most acclaimed magnet of engineering standards in the industry. Eriez has also set the benchmark for wet drum performance. The culmination of various in–plant tests has demonstrated that the separators will achieve magnetite recoveries in the 99.9+ percent. (This is based on magnetite losses of less than 1 gram/gallon of non–mag- netic effluent).

The Eriez Wet Drum Magnetic Separators uti- lized the 750 gauss Interpole magnetic element as standard equipment. The Interpole style ele- ment utilizes a true ceramic “bucking” magnetic pole or “interpole” between each main pole. The magnetic field of the bucking elements are charged to oppose both of the adjacent main poles resulting in increased magnetic field at depth. The Interpole element allows relatively high magnetic loading resulting in higher unit capacity and improved separation efficiency.

Two basic tank styles are offered. The drum rotates in the same direction as the slurry flow in the concurrent tank style. The slurry enters the feedbox and is channeled underneath the submerged drum. The slurry then flows into the magnetic field generated by the drum. The magnetite is attracted by the magnetic field, collected on the drum surface, and rotated out of the slurry flow. This tank style results in a very clean magnetic product.

The counter–rotation wet drum tank style is preferred for heavy media applications. The drum rotates against the slurry flow in the counter–rotation tank style. The slurry enters the feedbox and flows directly into the magnet- ic field generated by the drum. The magnetite is attracted by the magnetic field, collected on the drum surface, and rotated out of the slurry flow. Any magnetite that is not immediately collected will pass through to a magnetic scav- enging zone. The short path that the magnetic material must be conveyed between the feed entry point and the magnetics discharge lip, combined with the magnetic scavenging zone, results in high magnetite recoveries.

The Eriez Wet Drum Magnetic Separators are available in either the concurrent or coun- ter–rotation tank style. The specific application warrants the selection of tank style.

Product Table

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Item Name Part Number Description Price  
WLIMS 12" Lab 518

12" diameter X 6" magnet width Lab model L-8 electro wet drum magnetic seperator (WLIMS) (B-810) (PC-518) • Universal stainless steel tank for concurrent and counter-rotation operation with one plexiglass side for observation. • 1/3 HP TENV drive motor. • Eriez Model LWD control box incorporating a variable DC power supply with ammeter, voltmeter and drum motor starter reversing switch for operation from voltage specified below. • (A) Remote Mounted Control for operation from 115/60 - use drawing 2N-201311056 AND 1N-201313045 and C-1N-661137. • (B) Remote Mounted Control for operation from 220/50 or 230/60- use 1N-201306424 and 2N-201311056 Approximate Wattage: 470 NOTE: DOES NOT INCLUDE FRAME EXTENSION WITH CASTERS

$26,504.00 USD Add
WLIMS 48" Pilot 506

48X16 Pilot Plant Wet drum (HMDA or CDA applications. Interchangeable tank MMPB- 470 PC-506 • 48 inch diameter by 16 inches drum width, 12 inches magnet width. • HMDA construction, cast aluminum heads, 304 SS shell. • 304 SS wear wrap • 1-1/2 HP motor with chain and sprocket drive. (Available for 460/60 or 380/50) • 1000 Gauss Interpole magnetic element (see available optional elements below) • Universal carbon steel support frame; accepts other tank styles without modifications • 304 SS Counter-Current tank style (See available interchangeable tanks below). NOTE: THESE TANKS ARE COMPLETE AND ARE FULLY INTERCHANGEABLE WITH COUNTER-CURRENT TANK

$45,423.00 USD Add
WLIMS 48" - Optional Magnetic Elements 506a

For MMPB-470 PC-506 - 1150 Interpole

$2,487.00 USD Add
WLIMS 48" - Optional Magnetic Elements 506b

For MMPB-470 PC-506 - 850/1000 Gauss, High Gradient

$1.00 USD Add
WLIMS 48" - Optional Interchangeable Tanks 506c For MMPB-470 PC-506 - Self Leveling Counter - rotation tank style $11,085.00 USD Add
WLIMS 48" - Optional Interchangeable Tanks 506d For MMPB-470 PC-506 - Conventional counter rotation tank style $13,302.00 USD Add