Wastewater Treatment For Sand Washing Process


At present, sand and aggregate is the main building material of concrete and masonry structures in water conservancy projects. However, the existing sand and aggregate can not be well separated by ordinary sand washing equipment, and the sand washing effect is poor. It needs to be washed for many times, and the sand washing efficiency is slow. In the sand washing process, the waste water generated in the sand washing process of the sand washing machine is directly discharged And cause environmental pollution.

LDHB wastewater treatment for sand washing process scheme is mainly used to solve the problems of solid waste generated in the washing and beneficiation process and the purification and reuse of sand washing tail water. The whole system has good processability, high material screening recovery rate, and all tail water is reused, which greatly improves the resource utilization rate.

Wastewater treatment for sand washing process program steps:


1.Screening: the materials are transported to the waste water treatmenr by hydrocyclone with dewatering screen,circular vibrating screen or drum screen by belt conveyor, and several materials with different sizes are screened out.

2.Cleaning and dehydration: the materials under the screen that meet the specifications enter the cleaning water tank of the sand washing and recovery integrated machine. The sand washing wheel bucket rotates and stirs the materials in the cleaning box to carry out the cleaning operation. The impurities covered on the surface of the materials can be removed. After cleaning, the coarse-grained materials are sent to the dehydration screen by the sand dredger for dehydration.


3.Fine material recovery: the overflow of the all-in-one machine enters the tail water collecting tank through the pipeline. The tail water is pumped into the separator by the slurry pump, and the sediment is separated by the separator. After recovery, the fine material is discharged to the screen surface of the dewatering screen, and the coarse material is evenly mixed and dehydrated before discharging. The outlet is connected with a belt conveyor to convey the finished product to the designated position.


4.Solid liquid separation: at the same time, the content of suspended solids in the sludge water after treatment by the separator is less than 5%, which is discharged into the sewage pool, and then the tail water is pumped into the filter tank from the sewage pool by the pump for sludge water separation. After 80% of the tail water is treated by the filter tank into clean water, it will directly enter the clean water tank through the overflow port.


5.Sludge dewatering: the concentrated mud is pumped into the plate and frame filter press through the bottom of the filter tank. The filter press will press the concentrated mud into mud cake to realize dry stacking, landfill or other purposes. After the pressure filtration, the clean water enters into the clean water pool to realize the recycling of the clean water

LDHB wastewater treatment for sand washing process scheme can make full use of the site conditions for layout, small footprint, easy operation and management, high wastewater recovery rate and guaranteed quality of recycled water. If you also need wastewater treatment plan, you can leave a message to contact us, we will arrange professional and technical personnel to design and configure equipment for you.

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