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small plant flotation machines (4)
small plant flotation machines (6)
small plant flotation machines (3)
small plant flotation machines (5)
small plant flotation machines (1)
small plant flotation machines (2)
plant production flotation cell
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Compact Flotation Machines

This series of small froth flotation machines are remakes of the classic DENVER Flotation Cell design. Made to order to any size/volume and cell per bank you need.

Sizes: 0.25 cu.ft./cell – 50 cu.ft./cell (open flow) or (cell-to-cell) = from 7 Litre to 1.41 cubic metre

canada manufacturer

  • Mild steel construction
  • CRS shaft
  • Urethane wearing parts
  • Cast spindle bearing housings
  • Machined standpipes
  • Abrasion-resistant steel liners
  • V-belt drive
  • OSHA-type drive guard
  • HSS superstructure


  • Stainless steel construction
  • Urethane or rubber-lined
  • Automatic level control
  • Froth paddle assemblies
  • Feed/discharge/transition boxes
  • Launders
  • Support stand

Click for large flotation cells of up to 600 cubic feet or 17 metres cube.



Standard Capacity and Sizes of DENVER type flotation machines

small_denver_flotation_machine_small plant flotation machines (3)

denver flotation-machine-capacity-sizing-table

small plant flotation machines (1)

small batch flotation machine (3)

small plant flotation machines (5)


Installation and Operating Instructions

  •  Check the shipment upon arrival. Report any damage or missing components to the transportation company, file a claim if necessary.
  • If provided, install cell support base and shim to level position.
  • Check the interior of the cell to be certain there are no foreign objects present.
  • Check to be sure electrical characteristics of power are the same as the motors.
  • Place oil in froth paddle reducer or gearmotor if they are marked shipped without oil. If they are not marked check to be sure they have adequate oil before starting. Spindle bearings were greased at the factory, grease one time every week during operation.
  • Be certain the froth paddles turn in the right direction for froth removal from the cells.
  • Motors turn in either direction and should be reversed occasionally to provide longer impeller and diffuser life.
  • Open the air valve provided with each cell. The cells are normally operated on their own induced air.
  • Cells are normally provided with fixed drives. Changing speed requires changing the size of the motor sheave and possibly the belts.
  • Froth concentrate overflows at the front of each cell. The amount of froth depends upon the mineral content, amount of reagent added and the amount of air induced.
  • The degree of slurry agitation and air input varies with the speed setting of the impeller.

Impeller and Diffuser Replacement

  • The impeller is attached to the shaft by two (2) set screws in the impeller hub. The diffuser is attached to the standpipe by three (3) screws at the top of the diffuser.
  • In replacing the impeller and/or the diffuser, the clearance between the parts should be set at 1/8”.

Bearing Replacement

  • Scribe a line on the shaft above the bushing for the drive sheave. Remove the drive sheave, with a wheel puller if necessary.
  • Remove the impeller by undoing the set screws and sliding the impeller off of the shaft.
  • Loosen the screw in the top of the diffuser and with a wood block tap the diffuser from the standpipe.
  • Unbolt and remove the standpipe, at this time you should inspect the grease seal condition, also note the position of the grease seal if it is to be replaced.
  • Remove the dust cap from the top of the mechanism.
  • Before attempting to remove the bearing from the housing scribe a line at the bottom of the bearing locking collar for repositioning during reassembly.
  • Lock spindle horizontally in a vise.
  • Using a wood block and a mallet drive the shaft and lower bearing out of the mechanism.
  • Using a piece of shaft or pipe with a diameter of 1/8” larger then the shaft tap the upper bearing out of the mechanism.
  • Clean the spindle mechanism for reassembly.
  • Reassemble in the reverse order of the above instructions.
  • When reassembling the mechanism, it is critical that all components be placed in the same position they were in.
  • Check to be sure there is 1/8” clearance between the impeller and diffuser before reinstalling the mechanism.
  • Grease fittings of upper and lower bearing with several shots from a grease gun, any quality bearing grease will do. Grease one time every week thereafter.

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