Between {TAIL ~ process step V5} of {HEAD ~ size reduction}, e.g., at 30 mm, especially at 20 mm, and process step V7 of separating the remaining fractions, a process step V6 is provided, in which a second raw sand fraction RS2 is separated using a sifting device SE2 
Between { TAIL ~ process step V5 } of { HEAD ~ size reduction } , e.g. , at 30 mm , especially at 20 mm , and process step V7 of separating the remaining fractions , a process step V6 is provided , in which a second raw sand fraction RS2 is separated using a sifting device SE2
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH