Drum for magnetic separator and relevant production method
AssigneeSGM Gantry S.p.A.
InventorDanilo Molteni
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Abstract
In a drum for magnetic separator comprising a cylinder (C) of ferromagnetic material on the outside of which there are formed a plurality of longitudinal grooves (6) housing permanent magnets (7) arranged in longitudinal rows along a magnetic arc of 130°-160° with alternate N-S polarity, the cylinder (C) being located within a shell (M) of nonmagnetic material, the length (D) of the single dipole of the magnetic circuit is comprised in a range between 100 and 150 mm so as to provide a substantially homogeneous magnetic field along the whole magnetic arc, thanks to the limited length (D) of the dipole which results in a sinusoidal pattern of very limited amplitude and therefore with nominal values of the magnetic field that are present over almost 100% of the magnetic arc.
Claims13
Drum for magnetic separator comprising a cylinder (C) of ferromagnetic material closed at its ends by two flanges having central hubs provided with seats for bearings and locking clamps, said central hubs being arranged along the longitudinal axis (A-A) of said cylinder (C), a plurality of longitudinal grooves being formed on the outside of the cylinder (C) and housing permanent magnets arranged in longitudinal rows of a single polarity along a magnetic arc of about 130° to 160° with alternate N-S polarity between adjacent rows, the cylinder (C) being located within a shell (M) of non-magnetic material closed at its ends by two flanges (F) having flanged hubs (MF) provided with seats for said bearings, at least one of said flanged hubs (MF) being also provided with means for receiving from a motor the motion to drive into rotation said shell (M), wherein the length (D) of the single dipole of the magnetic circuit is in a range between 100 and 150 mm.
Dependencies are inferred from the claim text.