Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide) 2017-04-04T06:57:31+00:00
  • To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Flotation.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

Rotor rotation direction of flotation machine (4 replies and 2 comments)

6 months ago
Anupam 6 months ago

What should a flotation cells' rotor direction of rotation be; clockwise or counter-clockwise?

Bill Fraser
6 months ago
Bill Fraser 6 months ago

It does not matter. Just be sure to alternate from cell to cell. The helps reduce material short-circuiting from one cell to the next cell all the way down the bank.

Regular lubrication of shaft bearings is important, and bearing temperatures should be checked manually on a regular basis. The linings on the shaft, rotor, and stator should be inspected in each shutdown for wear, cracks, and chunk-type failure. Components with severe damage should be removed and replaced. Concentrically of the rotor inside the draft tube or stator should be checked.

Rotation should be reversed every shutdown, to achieve even wear on both sides of the blades. If rotation is not reversed regularly, symmetry will not be maintained, and then, when rotation is reversed, the motor may trip out due to excess current draw. Vibration should be checked against baseline values at least quarterly.

In self-aerated machines, the air openings should be cheeked to insure they arc clear. Similarly, in forced-air machines, the air intake openings in the rotor should he cleared of any residual slurry or debris.


6 months ago
AJNeale 6 months ago
1 like by David

Wow - that's a great response from Bill.  The one thing I might add is to get yourself a hand-held Vibration Meter like the Fluke 805 FC and implement a regular program of checking both the motor and the impeller shaft for vibration.  I know the maintenance guys will tell you that they'll take care of this, but these things often get overlooked.  I have had a lot of success with vibration monitoring as it will often allow you to implement changes before you have a catastrophic failure.  I don't rep or sell Fluke meters, so I'm not pushing any particular brand.  Fluke equipment is on the high end of the price range, but it is quality equipment.

Best Regards and Good Luck


6 months ago
David 6 months ago

Thanks for the great add-on Andrew.

Fluke 805 FC Vibration Meter and TPI 9070 Smart Vibration Meter as a cheaper alternative, maybe.

Use the Social Share Bar on the Left. Tell everyone you can about It's FREE & GOOD.

2 months ago

I worked in South America but never i din`t check recovery of copper in relation with Coriolis effect. Can be one interesting think for operation gays to check...Northern hemisphere and Southern hemisphere

max skinner
6 months ago
max skinner 6 months ago

I think the best way to handle this is to ask the manufacturer which is the correct rotation. If you are using older cells, like Denver cell to cell, there is only one way that will work.

2 months ago

And Wemco cells must same rotation from feed up to last cell

Please join and login to participate and leave a comment.

BUY Laboratory & Small Plant Process Equipment

We have all the laboratory and plant equipment you need to test or build/operate your plant.

ENTER our Mining Equipment' Store

We Sell EQUIPMENT for all types of Mineral Treatment PROCESSES and Laboratory Testing needs

Have a Mineral Processing QUESTION?

Come in, ask your question

911Metallurgist Community Forums

Talk to other metallurgists and be helped.


We can IMPROVE ALL PLANTS / Mineral Processing Engineering & LABORATORY Ore Testing

911Metallurgy Engineering

Contact us for process engineering, metallurgical investigations, plant optimization, plant troubleshooting, needs. WE “FIX” METALLURGY.