The scope and purpose of the present study is to contribute to the research of reclamation processes by investigating factors and conditions allowing replacement of fresh quartz sand consumption in foundry production by the recovered sand. Actually gained experience by the foundries on this field confirmed that reclamation of moulding used sands is regarded as an effective way of saving and protecting of the natural silica sand deposits.Opseg i svrha ove studije je doprinos razvoju istraživanja procesa obnavljanja pijeska pri pronalaženju okolnosti i uvjeta koji omogućuju zamjenu svježeg kvarcnog pijeska u proizvodnji odljevaka. Na tom polju stvarno stečeno iskustvo u ljevaonicama potvrđuje da se obnavljanje pijeska korištenog za izradu kalupa smatra djelotvornim načinom čuvanja i zaštite postojećeg prirodnog silicijskog pijeska
