A novel wastewater cleaning system for the stone-crushing and sand-making process

The nature of the slurry from the stone-crushing and sand-making processes is analyzed to develop a novel separation process. The process comprises hydro-cyclone separation followed by screening of the fines, clarification, and filtration. Recovering fine sand and clean wastewater for recycle is demonstrated. The +0.045 mm fine sand fraction and −0.045 mm ultra-fine clay in the slurry are separated and recovered. Fine sand that was previously lost and wasted is now recoverable. The cleaned and reused water is as much as 94% of the total.