• 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.

Pyrite depression by AMBS (3 replies)

Marshal Meru
9 months ago
Marshal Meru 9 months ago

While I was studying flotation using seawater, I had a problem with understanding the reason why Aeration and Sodium Metabisulfite is used as a Pyrite depressant in Cu-Mo flotation in seawater.

An article said that sufficient Cu-Mo recovery is attained at the expense of allowing large amount of pyrite in flotation froth and AMBS could be a treatment agent because of not requiring lime to depress Pyrite. (Note: Recovery reduction of Molybdenum was suggested to occur in seawater with high PH level.)

However, considering the PH level must be modified before the flotation start, how could the pyrite is cleaned by using AMBS? If the PH is not modified for Chalcopyrite, the dosage of collectors for Cu is dramatically increased, isn't it? Too Complex!

Bill Rico
9 months ago
Bill Rico 9 months ago

I'm not 100% what AMBS is but I know SMBS (sodium metabisulphite) is used in this role. AMBS = Air Metabisulfite Treatment http://is.gd/N8zBcW

Have a look and see if you can find any papers on Antofagasta’sCentinela (formerly Esperanza) as I think SMBS may be used in this role.

The other place to look would be in publications from Ian Wark research institute in South Australia. I know as part of the AMIRA P260 project they've done work on the chemistry of sea water flotation systems.

9 months ago
Obersturmbann 9 months ago

Na2S, Metabisulfite (Na2S2O5) suppresses all sulfides (exception is molybdenite)

9 months ago
Sturmbann 9 months ago

I believe he actually meant AMBS = Air + MBS. Air + MBS (normally SMBS) was used at some sites to depress pyrite when sea water is used. I'm not 100% certain on the pyrite depression mechanism either. I'm following discussion in this topic as well.

Please join and login to participate and leave a comment.