Date: Nov. 04, 2021
How to set up a zero pollution sand washing sewage treatment line? This is a question many customers want to know. Today, this article will give you an analysis. A set of weathered sand tailings zero-emission production lines needs to be used with tailings screens, thickeners, and filter press equipment.
At present, tailings treatment methods generally have three directions: tailings re-selection, tailings dewatering, and tailings filling the goaf. Below we will explain these three parts separately. In response to these three treatment methods, the LZZG R&D department has launched a weathered sand tailings zero-emission production line program. This program is designed to recycle and reuse metal and non-metal tailings and improve resource utilization and is committed to solving the washing and beneficiation process. The solid waste generated in the process and the purification and reuse of sand washing tailwater. The whole system has good manufacturability, high material screening, and recovery rate, and all tailwater is reused, which greatly improves the resource utilization rate.
Screening equipment: Tailings dewatering screen or tailings dry discharge system can be used to dehydrate and classify materials.
Concentration tank: Separation of mud and water through concentration and sedimentation, and purification of the tailwater.
Filter press: The thickened sludge in the thickening tank is pressed into a sludge cake through the filter press to achieve sludge dewatering and dry stacking.
The slurry of the weathered sand tailings zero-emission production line often contains a lot of water. Excessive water content in the tailings can easily cause tailings dam failure. Therefore, in the beneficiation plant, tailings concentration and dehydration are also important links. The common tailings dehydration process Includes hydrocyclone concentration, filter press filter, dry tailings dehydration, LZZG designed these three parts into the weathered sand tailings zero-emission production line.
Screening: The material is conveyed to the circular vibrating screen or drum screen by the belt conveyor, and several kinds of materials of different sizes are screened out.
Cleaning and dewatering: The under-sieve that meets the specifications enters the cleaning water tank of the sand washing and recycling integrated machine, the sand washing wheel rotates, and the material in the cleaning tank is stirred for cleaning operation to remove impurities covering the surface of the material. After cleaning, it is coarse The granular material is sent to the dewatering screen (dry tailings sieve) by the dredging wheel for dewatering.
Fine material recovery: the overflow of the integrated machine enters the tailwater collection tank through the pipeline, the tailwater is pumped into the separator (cyclone) by the slurry pump, and the sediment is separated by the separator (cyclone), and the fine material is recovered Discharge to the surface of the dewatering sieve and the coarse material is evenly mixed and dehydrated before being discharged. The discharge port is connected to the belt conveyor to transport the finished material to the designated location.
Solid-liquid separation: At the same time, the content of suspended solids in the muddy water after the separator does not exceed 5% is discharged into the sewage tank, and then the tailwater is pumped from the sewage tank into the filter tank (thickening tank) for the mud-water separation operation. After the filter tank (concentration tank) treats about 80% of the tailwater into clean water, it directly enters the clean water tank through the overflow.
Sludge dewatering: The concentrated slurry is pumped into the plate and the frame filter presses through the bottom of the tank. The filter press presses the concentrated slurry into a mud cake to achieve dry pile, landfill, or develop other uses. After pressure filtration, the clean water enters the clean water tank to realize the recycling of clean water and zero discharge in the entire process.
The zero-discharge production line of weathered sand tailings has realized the separation of silt and sand-the recovery and dehydration of solid particles in the material. Separation of mud and water-purification of tailwater from previous operations. Dry solid waste discharge-dry discharge and dry heap treatment of solid waste in the tailwater. It not only allows customers to meet environmental protection requirements but also utilizes tailings to achieve a win-win effect on the environment and economy. Those who need to know the details and procedures of the specific plan can contact us to ask for a price.
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