Tailings storage and transportation

The amount of concentrator tailings is often great, especially Tailings large amount of processing non-ferrous metals and iron ore poor is even greater. Such large tailings are not properly handled, which will inevitably cause disasters and environmental pollution. In particular, the tailings discharged from the flotation plant have more harmful chemicals and are more harmful to the river. In order to eliminate pollution, it must be properly disposed of.

In addition, the concept of tailings is relative. The tailings often contain some useful ingredients. For tailings with high value of useful components and which are not currently treated by the mineral processing technology , the tailings should not be properly stacked and properly stored. Management to prevent loss and cause irreparable damage.

The main method of tailings accumulation and storage is the tailings dam. The valley is used to block the dam at the valley mouth, and then the tailings sand can be stored inside. Of course, there is also a tailings dam surrounded by flat land. This is mainly a stacking method often used in a concentrating plant away from the mountain in the vicinity of the city. For dry tailings discharged from the dry sorting plant, if there is no useful mineral to be recycled, it can be used locally. For building bricks, cement and other raw materials, you can also use tailings sand to fill waste pits.

2. How many methods are used for tailings transportation?

Most of the tailings discharged from the concentrator contain a large amount of water and are discharged as a slurry. The tailings discharged from the dry selection plant are granular dry tailings.

Dry tailings are transported by: buckets or mine cars, belt conveyors, aerial ropeways, cars or railway trains;

Slurry tailings are mainly discharged through the slurry pipeline or discharged into the tailings dam by sand pump.

3. Why is the tailings dam discharge pipe divided into centralized ore and dispersed ore?

The tailings dam mining method is an important issue in managing the tailings dam and extending the service life of the tailings dam.

In the design of general tailings dams, the mining pipes on the pits are concentrated and ore-concentrated. In the summer, tailings are mainly used to disperse the ore-discharging pipes. In winter production, the main use of centralized ore-concentrating pipes is used for ore mining. The purpose is to make the tailings dam stack flat without dead angles and increase the storage volume. Alternate use, roughly half of the time each year.

Before the repair of a sub-dam, it is generally open and centralized to release the ore to facilitate the site to be dry and easy to take sand.

4. What should be paid attention to when accumulating sub-dams?

The accumulation of tailings, in addition to the initial dam (that is, the main dam) piled up with stones, called the tailings pond, mainly rely on the regular accumulation of dams to increase storage capacity. As the tailings dam gradually rises, the storage capacity gradually increases, and the rate at which the sub-dam rises begins to decrease. The initial height of the sub-dam is 5 meters, 7 meters, 9 meters or even higher, and it can be about 2 meters in the later stage.

There are generally three methods for stacking sub-dams: the first is to use the discharged tailings slurry in the pre-selected sub-dam accumulation position. According to the design of the sub-dam stacking map for stacking; the second method is to artificially accumulate the sub-dam, but the height of the stack is limited; the third method is to allow the bulldozer to enter the tailings dam and use the bulldozer to accumulate Dam, faster.

Either way, the slope of the sub-dam must be guaranteed to prevent collapse. The sub-abutment should preferably be cultivated with loess, which can withstand wind and rain, enhance the robustness of the sub-dam, and reduce the destructiveness of strong winds and heavy rain on the sub-dam. Especially in the sub-dams piled up in spring, the weeds with loam can better protect the dams.

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