Application of Vibrating Dewatering Screen in Tailings Treatment

2021-06-16

A large number of tailings are produced in mine development. The tailings have the characteristics of fine particle size and large emissions. They occupy a large amount of land during the storage process and cause pollution to the surrounding environment. Therefore, the tailings are safely discharged
Reuse and reuse have become an important factor in the sustainable development of the mining industry. At present, tailings substitute building materials are mainly used in cement, coatings, glass and other industries.

The traditional tailings treatment method is stockpiling, which requires the tailings pumping system to transport the tailings to the inventory pile. The tailings transportation distance is generally long and the transportation cost is high. The tailings storage capacity is limited, which cannot meet the long-term discharge of the concentrator. The following is an introduction to the dewatering and sand selection process of the tailings of the China Canada Concentrator.

Tailings dehydration process

1 Classification and concentration process of cyclone + dewatering screen + thickener + filter press

2 Thickener + vacuum belt filter

3 Thickener + chamber filter press

The three processes have their own characteristics and need to be selected according to the specific operating conditions of the mine. After experimental analysis, the graded concentration process is most suitable for the iron tailings of China Canada. The graded concentration method uses cyclones, vibrating dewatering screens, etc. as coarse-grained tails Mine dehydration equipment.

Sand selection process

On the basis of the tailings dehydration process, firstly, a cyclone + dewatering screen is used to separate and dehydrate the coarse-grained part of the tailings. The dehydrated product is used as a sand selection finished product. Since the overflow classification particle size of the sand selection cyclone is 0.1mm, Therefore, there are still more than 20% of the coarse-grained tailings in the overflow of the sand selection cyclone. In order to reduce the amount of dry tailings discharged into the tailing pond, the overflow of the sand selection cyclone is finally sent to the bottom through the conveying system. The first-level cyclone + dehydration screen dry discharge system is used for concentration and dehydration. At the same time, because the dry discharge system is set at a tailings pond of about 3km, in order to reduce the cost of tailings transportation, the existing thickener is used for underflow transportation after the thickener is concentrated. As far as the dry drainage system is dewatered, the dehydrated products are used as dam construction materials. While obtaining construction sand, it greatly reduces the cost of tailings discharge and brings considerable economic benefits to the China-Canada mining industry.