Strudex Flotation Rotor and Stator: High-Performance Wear-Resistant Components for Mineral Processing

Strudex flotation rotor and stator components provide the working mixing surfaces for mineral-processing cells, including copper-molybdenum and other sulfide circuits. Rubber, polyurethane and composite configurations allow the wear material to be considered alongside the mechanical duty. Start the selection with the cell’s position in the flowsheet: the same mineral can reach a rougher, cleaner or scavenger under different feed and reagent conditions.

Technical Parameters

The same mineral can present three different duties

• A rotor-stator enquiry becomes more useful when it describes what the mechanism actually receives.
• Include the gangue, recycled water, particle-size distribution and concentration at that stage, together with feed variation.
• This gives maintenance, process and procurement teams a common basis for specifying the replacement.

Where air, slurry and the two wear parts meet

The rotating element moves the slurry and contributes the energy needed for mixing. The stationary stator guides the discharge from the rotor, and the two profiles work together where air is dispersed into the pulp. Their relationship depends on the installed geometry, mounting position and running clearances. An outside diameter or a material name cannot describe the complete mechanism.

• Confirm how the cell receives its air.
• Forced-air equipment uses an external supply, while a self-aspirating design draws air through its own operating mechanism.
• The air path, rotor passages and associated components differ between designs.
• Match the replacement to the installed system; a familiar cell volume or shaft size is not enough to approve a different rotor-stator combination.

A froth change needs two lines of investigation

Changing froth appearance, sanding or a shift in motor load can prompt a mechanism inspection, but each observation needs process context. Ore properties, reagent addition, air rate and level control can change while wear develops gradually. A fresh component cannot, by itself, correct an unsuitable reagent regime or a faulty level measurement.

1. Review the operating record first. Compare feed, density, air, level, speed and motor load with a period when the cell was performing acceptably. Check that relevant instruments are giving credible readings.
2. During an isolated shutdown, drain and clean the cell using site procedures, then inspect the rotor, stator and their air and slurry passages. Record obstruction, local damage and missing or heavily worn elements.
3. Connect the findings. Distinguish a blocked passage or damaged profile from a process change, and identify which issue the proposed replacement is intended to address.

• This separation of evidence helps avoid two expensive mistakes: replacing a mechanism to solve a control problem, or repeatedly adjusting the process around a damaged mixing assembly.

Let the exposure define the wear material

Rubber and polyurethane are material families whose behaviour depends on formulation and exposure. Compare abrasive contact with cutting, impact and tearing, then consider the liquid chemistry and temperature. Include normal conditions and credible excursions, such as a cleaning fluid or changed process-water source that contacts the components.

• For chemical review, identify the reagents and their concentrations where known.
• A pH value is useful but does not describe every constituent or its effect on a polymer.
• Swelling, softening, hardening or cracking on the removed part should be recorded with the operating history.
• Neither a general chemical-resistance label nor the mineral name establishes a continuous-service limit.

Inspect the pair before retaining either part

• Look closely at rotor leading edges, the thinnest remaining blade sections and the air and slurry passages. Exposed metal support, missing pieces of elastomer and lodged foreign material warrant attention. Examine the stator vanes and attachment regions at the same time. Use component-specific inspection and replacement criteria rather than a universal remaining-thickness percentage.
• If only one component is being renewed, confirm that the retained companion still provides the required profile and clearance. Check shaft and mounting interfaces against the assembly drawing, especially where the cell has been modified or spares from different versions are held in the same store. Keep rotor and stator references together in the maintenance record.

Restart against a recorded operating window

Follow the equipment’s assembly, clearance and commissioning procedure. Once normal service is established, record feed conditions, speed, air setting, level and motor load. Compare subsequent wear and process observations at similar conditions. Concentrate grade and recovery remain circuit outcomes influenced by mineralogy and operating practice, so any improvement should be assessed against a representative baseline.

If earlier operating data are unavailable, establish a fresh reference after commissioning. Record enough normal production to represent routine feed variation before comparing operating periods or attributing a change in performance to the replacement.

For an enquiry, provide the cell model and volume, mechanism version, rotor-stator drawings, circuit stage, required material configuration and quantity. Add wear photographs, solids data, reagent chemistry, temperature and air conditions. Where a material or geometry change is proposed, identify the operating problem and the acceptance criteria before approving the replacement.

Product FAQ

Can I renew the rotor while keeping the existing stator?

Yes, if inspection confirms that the retained stator still meets the mechanism’s required profile, condition and clearance. Check vane loss, attachment damage and the relevant drawing revision before deciding. A new rotor cannot restore the intended mixing relationship when its companion is already substantially worn or incompatible.

Can the same rotor-stator pair serve forced-air and self-aspirating cells?

Only when the selected pair is specified for that exact mechanism and air arrangement. Forced-air and self-aspirating cells introduce air differently, so a shared tank volume or shaft dimension does not establish interchangeability. Provide the cell model, mechanism drawing and air path before selecting replacement components.

Does copper-molybdenum service determine whether rubber or polyurethane is better?

No. The mineral description alone does not define the wear exposure. Compare solids size and shape, local impact, reagent composition and temperature with the proposed formulation. Photographs showing cutting, swelling or gradual erosion on the previous parts help make that comparison specific to the actual circuit stage.

Will a new rotor-stator pair correct a decline in flotation recovery?

It can address a damaged or obstructed mixing mechanism, but recovery also depends on feed properties, air, level and reagents. Check those conditions alongside the mechanical inspection. Assess the replacement under a representative operating baseline so process changes are not mistaken for a component effect.