Solutions for Tailings Dewatering

Haiwang offers a wide range of equipment and process knowhow for tailings thickening, filtration and water recycling, with decades of databased knowledge of process solutions, operation support products and life cycle solutions.

Haiwang offers a variety of solutions ranging from single pieces of equipment to integrated systems and complete turnkey projects.

Solutions for Tailings Dewatering

Currently Tailings are a composite of all processing plants wastes and represent varieties of mineralogy with a wide range of particle sizes rheology, process water, excess reagents and spillage. Parts of these streams are relatively easy to dewater while others maybe extremely difficult to handle. As a composite they tend to behave more like the worst component.

Dry Stack Tailings Solution

Dry stack tailings systems are particularly suited to mining operations operating in areas where water conservation is critical – they also provide other significant environmental and safety benefits too. Dry stack facilities offer a number of advantages to other surface tailings storage options – some of these include:

  • Reduce a huge investment for building tailings pond
  • Remove the potential danger of dam-break, landslide and infiltration of traditional tailing ponds
  • Can be used in areas where water conservation is critical and any water loses can jeopardise plant performance.
  • Dry stacking is suited to areas of high seismic activity as the construction of retention embankments is prevented.
  • For cold climates, dry stacking prevents pipe freezes and frosting problems with conventional impoundments.
  • Groundwater contamination through seepage is virtually eliminated.
  • Filtered tailings allow better recovery of dissolved metals and process chemicals (e.g. gold and cyanide).

Dry stack tailings equipment

  • hydrocyclone
  • vibration dewatering screen
  • thickener and press filter

Hydrocyclone

Compared with the traditional hydrocyclone ,the high concentration hydrocyclone adopts multistage cone structure . The first cone angle is bigger ,making the tangential velocity of the fluid inside the hydrocyclone to maximum ,and increasing centrifugal force .The second cone angle is smaller ,but longer cone ,pulp here has enough time and space to exchange fully .The third cone has a large angle and straight section structure .While ,the involute feeding way can increase capacity and reduce the wear and tear .The high Concentration hydrocyclone has advantages of high underflow concentration ,large production ,fine partical size , and efficient classification, helps to improve the coarse tailings processing effect as high as possible ,and reduce the load of follow-up fine processing ,the equipment specification and investment.

Vibration Dewatering Screen

The screen deck adoptes polyurethane instead of traditional Steel materials ,high structural strength, wear resisitance, easy to change and not easy to jam. Compared with filter, the dewatering screen has characteristics of continuous and stable operation, small footprint, low fault rate, simple maintenance, little one-time investment and low follow-up operation cost. According to the tailings processing capacity, plants layout, investment cost and other factors, the dewatering screen is the first choice.

Thickener

Equipped with flocculant adding device ,using the flocculant agent to make the fine particals to produce the floccules, accelerate the sedimentation rate and decrease the specification.

Using precise automatic control system, automatic lifting rake ,automatic alarm, avoiding the pressure rake phenomenon.

Adopting deep feeding method, advection sedimentation technology and unique steady flow device, reduces the solid mineral kinetic energy, and effectively improves the processing capacity and Concentration efficiency.

Our solution for dry stack tailings has been successfully applied in more than hundreds of mines in the world. Our solution for dry stack tailings has been proved to be effective, and can reduce the operation cost, avoid the safety hazards of tailings dam, ensure the continuous and safe production, and develop the tailings’ comprehensive utilization, which has good application value.