The invention relates to a working
system for solving a concrete
raw material recovery problem, and in particular relates to a fine sand recycling
system with high
recovery rate and a working method thereof. The recycling
system mainly comprises a gravel screening mechanism, a sand washing device, a fine sand deposition recycling device and a waste residue
pool, wherein the gravel screening mechanism comprises a movable base, a screening
machine frame, a supporting roller, a rolling belt, a first screening layer, a second screening layer, a sand
material recycling box and a vibrator; the sandwashing device mainly comprises a vertical support, a wheel-bucket type sand washing
machine, a connecting
pipe fitting, a sand washing
pool and a power device of the sand washing
pool; and the fine sand deposition recycling device is installed below the sand washing device, and mainly comprises a fine sand depositing bucket, a leading-out groove, a spiral revolving
machine and a galvanized steelpipe. According to the working system and the working method, the components of all the mechanisms are sequentially subjected to works of
filtration separation,
elutriation separation and rotary separation, so that the
recovery rate of fine sand can be improved, the content of fine particles in a sand material is improved, the manufacturing cost of the
engineering construction can be reduced, andthe mixability of the concrete is stable and reliable.