Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal

Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal 2017-04-04T06:57:46+00:00
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Polyethylene Oxide for Flocculation (6 replies)

JohnnyD
2 years ago
JohnnyD 2 years ago

Can PEO (polyethylene oxide) be used as a flocculant in a thickener? I've heard that it might be used in the mining industry, such as in the dewatering process for mineral waste. How is it used? Does it increase settling rates?

Alan Carter
2 years ago
Alan Carter 2 years ago

POE can be used as a flocculant in some applications. The term "thickening" in the mining industry is equivalent to "dewatering" in equipment called thickeners. Which is a tank with a mechanism inside. The thickener you mentioned is not the same. If you want a substance that change the flow properties; most "flocculants" will do. Clay could also change the flow properties as in "drilling muds".

Bob Mathias
2 years ago
Bob Mathias 2 years ago

PEO can be used as a flocculant in thickeners and clarifiers. Its used in some applications because it can be food grade. Its use in mineral tailings is pretty rare.

John Koenig
2 years ago
John Koenig 2 years ago

Yes it can - as the saying goes, "horses for courses" one has to find the application best suited for this. As it is typically non toxic that would help. Years ago wax was used in helping particles coagulate, however, that was years ago.

Maya Rothman
2 years ago
Maya Rothman 2 years ago

Work at the University of South Australia looked at PEO in clay flocculation and claimed some benefits in dewatering relative to conventional flocculants (McFarlane, A.J., Addai-Mensah, J., Bremmell, K., 2005. Rheology of flocculated kaolinite dispersions. Korea-Australia Rheology Journal, 17, 181-190). Feedback I've had from on industry contact is that PEO is not as friendly to work with as other products.

Victor Bergman
2 years ago
Victor Bergman 2 years ago

We starting using it at Port Pirie in the copper matte leach circuit in about 1986 as a colloidal silica coagulant to aid thickening and to reduce crud formation in the subsequent solvent extraction circuit. It had a positive effect on the circuit.

JohnnyD
2 years ago
JohnnyD 2 years ago

Thanks to you all for your responses and information. I was on vacation last week so I just saw them today. I may have some follow-up questions as my knowledge is limited regarding many of these applications.

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