In the separation of solids and liquids in mining, one of the most used equipment is the filter press, its main application is in the handling of the tailings.

This in essence is a very simple operating equipment, however it can dehydrate between 25 and 60 percent of the volume of slurry with which it is fed.

The filter consists of steel frames that hold a membrane, these membranes can be of different sizes, the membrane and the frame make a plate that is subject to two or four beams according to the design of the filter, the number of plates is dictated by the capacity and speed required for filtering, in the end of the filter we have a piston that presses the plates once they are full.

The operation process begins with the filling of the filter for which the slurry is pumped between each of the plates, as the pumping pressure increases, the slurry is forced to pass through the membrane which let the liquids pass and accumulate the solids in a dry paste that is trapped between the plates, after this step the plates are compressed by a piston located at the end of the filter.

The filtered liquid is sent to drain ports between the plates and to the drainage channel, to release the solids between the plates, the pressure of the piston is released and the plates are separated to dropping the dry paste.

Some filter presses come equipped with a self-cleaning system, which when separating the plates deploys a pipe with jets that wash the membranes one by one with pressurized water every certain number of filtering cycles.

As I mentioned above, the operation of these equipment is simple, but since water is one of the most necessary and increasingly less available supplies, the recovery of water has become a recurrent issue, and the use of equipment like these become more common in mining operations worldwide.

Ecn automation is a representative of the Phoenix Equipment brand, experts in handling, separation of liquids and solids, and sludge dewatering, covering the design, commissioning, and maintenance services of these equipment.



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