Wet magnetic drum separator
Metso's Mining and Construction Technology

Metso's LIMS, low intensity magnetic separators for recovery of ferro magnetic ores to produce pre-concentrates or concentrates are available with three different tank designs, (concurrent, counter-current and counter-rotation) using a common magnetic drum assembly. Two of the tanks are designed to enable easy multi-stage erection.

Main benefits of LIMS are:

* The magnetic system allows for very high loading with excellent selectivity at highest recovery, which reduces the number of units required.
* Fewer machines means less maintenance, lower capital and operating costs

Main feautures fof LIMS are:

* The heart of the magnetic separator is the magnet assembly. Metso 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.