Key Benefits

  • Higher recovery and grade with easy start-up
  • Lower costs due to lower reagent consumption, longer mechanism life and less maintenance
  • Adequate residence time for optimum recovery and concentrate grade
  • Extremely reliable, maintenance kept to a minimum
  • Treat many particle sizes efficiently

Higher recovery and grade with easier start-up

Available in 13 cell sizes, from 1 to 3,000 cubic feet, the Wemco 1+1 can meet your requirements for virtually any application or particle size. 

Unique flotation mechanism

At the heart of each WEMCO 1+1 cell is a patented rotor-disperser that delivers intense mixing and aeration. Ambient air is drawn into the cell uniformly distributed throughout the pulp, providing optimum air/particle contact. In larger cells, a false bottom and draft tube channel slurry flow, ensures high re-circulation and eliminates your need for sanding. Also available as the InertGas™ design for use in copper/moly separation resulting in lower reagent consumption and eliminating the need for nitrogen supply. 


A simple and rugged construction make the WEMCO 1+1 flotation mechanism extremely reliable and keeps your maintenance to a minimum. A heavy-duty bearing stand supports the motor driven V-belt and shaft assembly. Twin oversized antifriction bearings mounted in cast iron housing maintain accurate shaft alignment, ensuring you get smooth, trouble free rotor operation. The stand pipe, disperser, and hood are suspended beneath the base plate.

A durable and flexible solution

Efficient recovery
This combination of efficient aeration and optimum solids suspension gives you the highest specie recovery and concentrate grade performance available, and reduces your reagent consumption.
Cost benefits through Airflow
Airflow into the pulp is induced by the turning rotor. No forced air supply system is required, eliminating the need for you to operate blowers and distribution piping - and thereby cutting your costs. Airflow compensation for varying feed densities is automatic, minimising the operator attention required. Another benefit is that you can remove a single mechanism for service without interrupting production, unlike forced-air systems which require you to shut down an entire cell bank for service access to a single mechanism. And more uptime means more productivity.
Operate either clockwise or counter-clockwise
Complete sectional symmetry allows you to operate the 1+1 rotor either clockwise or counter-clockwise and to rotate it end-for-end. This allows for the transposition of worn and unworn surfaces and further extending mechanism life.
Treat multiple particle sizes
WEMCO 1+1 flotation cells are commonly used in coarse float applications such as phosphate and potash with feeds of up to 85% plus 65 mesh and maximum particle sizes as large as 10 - 12 mesh, so you can easily treat many particle sizes.

Intense mixing and aeration

Flexible, Modular Tank and Box Design

The basic module of the WEMCO 1+1 flotation system is a cell consisting of a single tank and mechanism. Several cells are bolted together to form a flotation machine with feed, connection and discharge boxes as required. Pulp level in the tanks is controlled by automatically operated dart valves in the connection and discharge boxes. All boxes are elastomer-lined for maximum abrasion resistance.


Elevated Rotor Position

To reduce wear on your rotor and disperser surfaces, the 1+1 aeration mechanism is positioned well above the tank bottom, eliminating contact with abrasive, oversized tramp material. After shutdown, the elevated rotor allows 1+1 cells to be restarted instantly, unlike conventional designs where the rotor and floor-mounted stator are located in the zone of heaviest solids accumulation.


Large design clearances

Aerator mechanism erosion is further reduced by large design clearances between rotor and disperser. Normal wear life of a WEMCO 1+1 mechanism is 2-4 times that of closely spaced conventional rotor/stator designs. Because WEMCO mechanisms stay within design tolerances longer, you can maintain peak metallurgical performance over a longer period, further enhancing your profitability.


Reliable, Automatic Level Control

A unique electronic/pneumatic level control system uses dual bubble tubes or ultra-sonic devices so you can accurately measure and precisely control pulp level regardless of fluctuations in density. Convenient panel displays provides you with continuous, easy-to-read access to operating information. This PLC unit integrates easily with mill DCS systems for complete remote operation from your control room, including set point and process variable readout.

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