Sand and stone separator

Abstract

The invention relates to a sand and stone separator. The sand and stone separator comprises a shell, a roller rotationally connected to the shell and provided with an opening in one end, a first driving assembly for driving the roller to rotate and a sealing plate fixedly connected to the shell and rotationally connected to the end, provided with the opening, of the roller, the sealing plate is provided with a feeding hopper and a stone discharging hopper located below the feeding hopper, first screening holes for only allowing sand to pass through are formed in the side wall of the roller, spiral material pushing blades are arranged on the inner side wall of the roller, the shell is provided with a flow guide groove located below the roller, a sand dewatering mechanism located below the flow guide groove and a paste water collecting groove located below the sand dewatering mechanism, the sand dewatering mechanism comprises supporting frames located on the two sides of the paste watercollecting groove correspondingly, sliding pieces connected to the supporting frames in a sliding mode in the horizontal direction, screening grooves formed in the sliding pieces and second driving assemblies for driving the sliding pieces to move back and forth, and second screening holes for only allowing cement paste water to pass through are formed in the screening grooves. The sand and stoneseparator has the effect of increasing the separation rate of the sand, the stone and the cement paste water.

Description

technical field [0001] The invention relates to the technical field of concrete processing, in particular to a sand and gravel separator. Background technique [0002] The commercial concrete mixing station inevitably produces a large amount of wastewater during the cleaning process of the commercial concrete transport vehicle. This wastewater not only contains conventional building materials such as sand and cement, but also contains various types of concrete additives. If it is discharged directly, it will not only cause a waste of building material resources, but also cause serious pollution to the natural environment. Most of the current cleaning wastewater of concrete mixing plants adopts multi-stage slag separation and natural precipitation method for solid-liquid separation. Not only is the treatment efficiency low, but also the settled wastewater cannot be recycled due to the high content of suspended solids. [0003] In recent years, the commercial concrete mixing ...

AI Technical Summary

Problems solved by technology

[0005] The above existing technical solutions have the following defects: the prior art adopts the integrated design of sand screening and sand dehydration, and the sand and slurry water directly enter the drum. Due to the high viscosity of the slurry water, the sand, stone, and cement Slurry-water separation is not thorough enough and the separation rate is low

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