The sand-gravel separator is mainly composed of six parts: feed tank, stirring separator, water supply system, screening system, slurry homogenization, recovery and waste slurry reuse system. When residual concrete and water enter the tank, circulating water is continuously injected at the same time. Under the impact of water flow, the mixed slurry enters the separator through the water inlet to fully clean the residual concrete. The cement slurry continuously flows out from the slurry outlet at the bottom of the separator and flows into the slurry pool through the slurry guide groove.
The cleaned sand and gravel are pushed by the spiral blades in the stirring separator and fall into the material pool after separation. Cement slurry water flowing into the slurry tank from the slurry tank is mixed with clean water in a specified proportion by superposition method, and the separated sand, stone and slurry water are reused.
When separating sand and gravel, there should be enough water to wash it, so that the stone content is less than 1% and the sand content is less than 3%. Although the fine material composition of the separated sand and gravel is reduced and the gradation changes, it will not affect the use because of its specific gravity in the yard.