(57) The object of the invention is a mechanical rotary casting sand reclaimer, having
a base with a grain hole and a lock, wherein the base contains a rotor supported by
a vertical bearing, coupled with a driving motor by means of a belt transmission,
and an abrasive ring installed on the base and enclosed within a cylindrical casing
oriented concentrically to the rotor. The reclamation unit comprises an abrasive ring
(5) with a profiled internal surface and a cylindrical external surface with lugs
on its perimeter and on the bottom of the ring located within the cylindrical casing
(4). It further comprises a rotor supported by a vertical bearing, the rotor having
abrasive blades or rods (6) and located in the base concentrically to the abrasive
ring (5). The rotor is connected with a driving motor (7) by means of the belt transmission.
It further comprises a ring air blade (9) installed on the top surface of the abrasive
ring (5), the ring air blade having a dedusting chamber casing (10) attached to it.
The casing (10) is equipped with a casting sand batch hole (11) and a side revision
window (12). On the top surface of the abrasive ring (5) there is further installed,
coaxially with the axis of the chamber, a telescopic dedusting duct (14) ending (13),
the dedusting duct (14) being connected with a dedusting cyclone (17) and a suction
fan (18). The dedusting duct (14) has sensors (15) for measuring air velocity and
a triboelectric dust counter; the sensors (15) being connected with a triboelectric
sensor signal converter (16) and a controller of the rotational speed of the driving
motor (7).
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