Column Flotation

[barrywills]

I would suggest that you look at www.min-eng.com/frothflotation/refs/2007.html where you will find all the research papers on Flotation since 1999.

Also, I would suggest that you contact Prof. Juan Yianatos at Santa Maria University, who is one of the world experts on column flotation.

[scarcha]

thanks a lot barrywills, i know about this prof., i wil speak with my guide professeur (Dr. Luis Magne) for any information or if he can put me in contact with prof. Yioanatos.

[csuhgyl2003]

re scarcha www.cpti.bc.ca

[jpt]

I did some work a while back at the University of Toronto on the inherent difficulties with coarse particle recovery in columns. The problem is not necessarily with agitation or buoyancy - in fact inadequate collection is more of a problem with fines. Coarse particles will make it to well into the froth, but tend to suffer from significant drop-back, creating a high circulating load. As the froth becomes more drained (towards the top) bubbles coalesce and the coarse particles tend to detach. It was found that bubble stability in the froth determines, to a large extent, coarse particle froth recovery. Factors that affect stability, such as drainage, are in turn affected by variables such as particle shape, hydrophobicity and interestingly the drainage-hindering presence of smaller particles within the froth structural walls (plateau borders).

[mikhailburstein]

There were some works done in Russia on "Foam Separator" for coarse particle flotation in pneumatic (impellorless) cells. Those machnies included top quiescent feeder for the coarse fraction of the slurry onto froth layer which minimized the distance these particles needed to travel to the froth launder.

[jitu1984]

hell everybody, Recently I was in Hindustan Zinc limited R.A. (worlds 3rd largest low cost Pb-Zn producer company) where Bateman Column cells were used in the flotation circuit. Here Zn is the main product and Pb as a by product. it was observed that if the Pb circuit was behaving well then Zn automatically behaves well but recently their is some problem with the Pb circuit as the Graphite content is observed to be more in the final Pb product. if we try to reduce the Graphite by adding the depressant Nigrosine then although it helps but in the later stage it also starts depressing the Pb as well as Zn which in turns reduce the recovery of the product. please if anyone can suggest some way to find out the proper solution for the problem? can we do some adjustment in the air to get the consistency in the product? ([e-mail])