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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Tailings Dewatering Process (6 replies)

Marshal Dienes
2 years ago
Marshal Dienes 2 years ago

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

Hauptsturm
2 years ago
Hauptsturm 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 mud’s".

David Kano
2 years ago
David Kano 2 years ago

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

Marshal Meru
2 years ago
Marshal Meru 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.

Standartenfurer
2 years ago
Standartenfurer 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 started 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.

Marshal Dienes
2 years ago
Marshal Dienes 2 years ago

Thanks to you all for your responses and information. I may have some follow-up questions as my knowledge is limited regarding many of these applications.

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