Mini Flotation Pilot Plants

The Mini Pilot Plant puts the capability of a conventional full scale pilot plant in your hands, for a fraction of the cost. More than 30 MPP's in operation worldwide.

Eriez Flotation Division offers a more economical method of conducting metallurgical feasibility studies with the Mini Pilot Plant. Large-scale pilot testing is a multi-million dollar investment and can consume hundreds of tons of ore. These large tests are time consuming, expensive, and may require permitting just to obtain the required sample. By comparison, EFD’s Mini Pilot Plant runs at a feed rate of only 5 kg/hr using just drill core. This proprietary system simulates plant circuitry and allows various circuits, grind size, and reagent chemistry to be evaluated in a short time period. The Mini Pilot Plant can drastically reduce the expense and time necessary for development and confirmation of a plant flow sheet.

Proven repeatable results allow you to design and test flotation circuits with confidence. Extract the maximum amount of metallurgical information from as little as 150 kg of ore sample.

Save Time - Accurately determine mineral processing grade and recovery outcomes much quicker and earlier in the deposit evaluation process

and Money - Low sample acquisition costs, low sample disposal costs, low operating costs, low processing costs

While testing the entire ore property - You already have drill core from the ore zone, use it to confidently evaluate the economic potential of the entire ore body, not just one deposit.

With the MPP and using drill core samples a process metallurgist can:

  • Run continuous flotation test campaigns including re-circulating streams
  • Simulate the continuous operation of rougher/scavenger/cleaner circuits
  • Develop full circuit flow sheet designs
  • Derive mass balances and circulating loads
  • Produce full grade and recovery curves
  • Test for ore zone variability

Eriez’ Mini Pilot Plant includes:

  • Batch Rod Mill
  • Holding Tank
  • Feed Tank
  • Continuous Flotation Machine (CFM)
  • Lab Column
  • Reagent Cart
  • Pin Mill
  • PLC Data Acquisition System


Powder coated steel construction with 10-15 kg capacity stainless steel drum featuring:

  • Variable speed drive with digital speed indication
  • Electronic countdown timer
  • Electro-hydraulic tilt system
  • Stainless steel discharge hopper

Powder coated steel construction with 60 L stainless steel tank includes:

  • Variable speed agitator drive
  • Variable speed re-circulation pump

Powder coated steel construction with 60 L stainless steel tank includes:

  • Variable speed agitator drive
  • Variable speed re-circulation pump
  • Automated slurry stream sampler system

Processing 10-15 kg/h of ore slurry the continuous flotation machine features heavy duty construction and includes:

  • Twelve 1.7 liter flotation cells each with Denver D-12 type agitators; variable speed control, digital air flow indication and control
  • Eight variable speed peristaltic pumps, each with three pump heads,for concentrate and tails transfer
  • Launder spray water with flow measurement
  • Electro-hydraulic lift to raise flotation agitators from cells
  • pH/ORP measurement system
  • Automatic lime addition system (optional)
  • Adjustable overflow weirs on each cell

Numerous interactive flotation circuit layouts can be readily tested simply by re-arranging the launder and transfer pump configurations.


The frame is heavy duty steel with a clear PVC column body 75 mm in diameter, and approximately 2000 mm in operational height and features that include:

  • Variable speed feed and tailings pump
  • Automatic level control
  • Digital air flow control
  • Wash water system with digital flow meter

Constructed in heavy duty powder coated steel includes:

  • Continuous stirred mill attritor
  • Stainless steel grinding chamber and shaft
  • Three hp motor with variable frequency drive
  • Digital speed display
  • Stainless steel grinding media

The reagent dispensing cart is constructed in stainless steel and includes:

  • Eight or sixteen precision metering pumps each with 0-50 ml/min flow range
  • Variable speed control for each pump
  • Forward and reverse pump control
  • Remote control via optional PLC based supervisory system
  • Ratio control reagent dosing based on the slurry feed ratio

Each individual MPP module can be connected to a pre-programmed and configured PLC-Data acquisition system. The separate PC based work station is HMI configured allowing the operator to monitor, control, trend and display important operational parameters.