Download Slurry Pump Basic Handbook!
How to size and select the right slurry pumps for your application? You can find the answer and much more in Slurry Pump Basic Handbook.
Flotation froth pumping. Phosphate and apatite washing plants. Calcium carbonate upgrading plants. Mixing and distribution units. Cement plants.
More efficient pumping at higher capacities and a smooth operation, free from pulsations caused by air locking.
Extra-long wear life. Parts in different materials are fully interchangeable and can be combined.
No submerged stuffing box, bearings or shaft seals. Design ensures minimum maintenance and eliminates any requirement for water flushing.
The concept behind a froth pump is to avoid pumping air and to separate as much air as possible from the slurry before it reaches the pump impeller.
The vertical froth pumps utilize the same principle as hydrocyclone separation where air is separated from the slurry in a vortex created by the impeller rotation and the tangential inlet to the pump’s conical sump.
This results in more efficient pumping at higher capacities and a smooth operation, free from pulsations caused by air locking.
Metso’s vertical froth pumps are known as Sala VF vertical froth pumps.
Sala VF froth pumps are often used in applications that involve handling of air entrained slurries, such as flotation froth in base metal concentrators, phosphate and apatite washing plants and calcium carbonate upgrading plants.
Thay can also be utilized as a mixing and distribution unit, where dry powder has to be mixed with water, as well as with cement in ready mixed concrete and for grouting and injection mixing.
Integrated unit for layout flexibility
Smooth operation of the open vortex created in the sump and vertical “wet end” inlet prevents air locking
Cantilever design does not require submerged bearings or shaft seals
Bearing assembly with double protection sealing arrangement to prevent ingress of slurry
Wear parts are available in a variety of different materials
Standard pumps are supplied with parts in wear resistant Natural Rubber or High Chrome iron alloy, with a nominal hardness of 600 BHN. Other materials are also available.
The wear parts have large material sections for extra-long wear life and are designed for the toughest applications.
Parts in different materials are fully interchangeable and can be combined for optimum life.
The heavy-duty pump shaft is a cantilever design, hanging below the bearing housing. There are no submerged stuffing box, bearings or shaft seals. This design ensures minimum maintenance and eliminates any requirement for water flushing.
Impeller clearance is maintained by external axial adjustment of the shaft/bearing assembly. Bearings have double protection seals against the ingress of slurry.
The casing on the Sala VF froth pump is supported by a beam. The beam is either lowered by hand or a hydraulic jack, depending on the pump size. The beam can be turned out so that the “wet end” parts can be accessed by a lifting device.