The design of a permanent magnet filter suitable for use in troughs or settling tanks is shown in Figure 3.82. A number of core magnets are arranged side-by-side in a nonmagnetic housing and effectively connected in parallel by the special pole pieces. The filter cage then consists of a series of strips on either side of the magnets, located
between the pole pieces. The filter is placed in the trough in the line of flow. A complete assembly is shown in Figure 3.83.
Magnetic elements may also be fitted into the feed pipes or funnels of troughs, the magnetic filter funnel being widely used in the pottery and paint industries.