Within the REGMAS project the prototype of the unit of a yield of 1.5 Mg/h was developed. It is used for the reclamation process investigations in the Laboratory of Machines of the Faculty of Foundry Engineering and enables transferring of the obtained results to foundry plants interested in reclaiming small amounts of various kinds of used sands. For financial reasons these foundries are unable to apply professional systems of the sand grains reclamation.
The universal vibratory reclaimer REGMAS, functionally integrated with the pneumatic cascade classifier is intended to the dry mechanical reclamation of practically each used sand. It can be installed in reclamation seats of small and middle size foundry plants. The view of the unit with the cascade classifier, without the external screen is presented in Figure 1.
Used sands, after separation of metallic contaminations, are supplied to the device charge. The primary reclamation is realised on the crushing grid and on the set of 3 sieves. The lowest sieve is of a conical shape of clearances between vertical elements of palisade (slits) being 1.25 mm. At the reclaimer bottom, in its buffer part, loose metallic abrasive elements (spheres) are placed. Together with the vibratory influence they realise the secondary reclamation. The sand screened via the conical sieve is transferred by the vibratory trough and proportioning system into the cascade classifier, supplied from the bottom by the fan of a controlled air speed. The reclaimer is set in motion by means of two rotodynamic motors of a controlled rotational speed and a set vibration excitation force.
Fig. 1. Prototype REGMAS reclaimer.