Innovative Developments in Sand Reclamation Technologies
نویسنده
چکیده
Reclamation of used moulding and core sands is defined as a treatment of waste refractory materials allowing to recover at least one component of properties similar to the properties of the new component and to reuse it for casting moulds and core production. In traditional technologies of casting moulds and core production on the basis of high-silica sands with binding agent addition, the reclamation consists mainly of a sand recovery and very seldom of a sand and bentonite recovery. Traditional reclamation technologies are not always enough intensive to liberate silica basis from the envelope of used binding material, thus new innovative methods are investigated to improve the reclamation effectiveness. This methods are: innovative thermal reclamation and innovative mechanical-cryogenic reclamation 1, 2 .
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