Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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Started by Tarun Karakoti
In INDIA we have huge dumps of low grades from 20 to 40%. Example 25, 25, 25 MnO2, SiO2, FE2O3 --how to upgrade, and to what extent!Does anyone have experience in floating Manganese dioxide and what Chemicals are used.
Last commented on by Mrityunjay
Sir, I am in Zambia and looking for a processing plant to produce 77% MnO2 from our Manganese Mine. Can you please guide us
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Started by Amar
Could you please suggest me best depressants for carbonate minerals in flotation of sedimentary phosphate? I'm planning to float apatite in direct flotation.
F
Last replied to by Fati
Dear M. Amar, It's been almost two years since you posted this topic, so I hope that you found the answer you were looking for! If so, can you please suggest me some depressants for carbonate?!
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Started by Amar
During flotation of Galena (lead) and sphalerite (zinc), why do we have to depress sphalerite first to effectively separate them?
A
Last commented on by anton
Can i get video,( galena separation ) my email antomonica0762@gmail.com, thank you
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Started by
Someone have information related with problems associated with excessive froth in a Gold sulfides ore in flotation and Alunite Activation?
Last replied to by David
see https://www.911metallurgist.com/froth_flotation/excessive-frothing-at-cleaner-flotation-for-low-grade-gold-sulphide-ores
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Started by OberstGruppen
Is it profitable to recover zinc from an abandoned flotation tailing dumps having 80 wt % CaCO3 and 9% zinc ores?What is the appropriate method for zinc recovery?
Last replied to by Amar
Since your goal is to recover zinc minerals, the easiest first step is bulk flotation of the metals using xanthate collector (preferably isobutyl xanthate for zinc minerals). The particle size distrib...
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Started by Standartenfurer
Currently we have an operation in Peru which is having some troubles with native copper flotation, I would like to know is anybody has some experience floating copper native together with Cpy, Py, Bn.
Last replied to by Victor Bergman
A bleed to a gravity circuit can have a relatively quick ROI. You might want to check out the use of Nelson concentrators, which can also significantly raise gold recovery prior to the flotation circu...
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Started by Standartenfurer
Tell me how to get rid or depress and reduce MgO in the Cu / Ni ores flotation? Using reagents company Cytec, but MgO 22-24%
Last replied to by Rahil Khan
Anything we want to know we should 1st try practically feasibility then go for discussion.
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Started by OberstGruppen
Ore included 14 - 24 %Mn its carbonate> 60 %; how is the Flotation Process of Manganese Ore?
O
Last replied to by OberstGruppen
Ore is 60 % carbonate and 40 % oxide , probably needed first step to be fried in a rotary kiln to turn the oxide of which are easier to perform with lucenjetosulfurnakiselina after dithionate method ....
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Started by Zander Barcalow
How imperative is to measure residual xanthate (SIBX) in UG2/Merensky flotation plant? What is the residual xanthate flotation industry standard? Which streams are important, SRT only?
Last replied to by Oberfuhrer
Many years ago the MPRU (now Centre for Minerals) at UCT used to run several training courses at the various platinum mines. One of the courses was on measuring residual xanthate levels. What they fou...
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Started by Unterstarm
I would like to find and meet people who are using electrochemistry for flotation.
S
Last replied to by Sturmbann
Very interesting discussion! A few of the issues with using ORP in flotation are:What is the reference electrode? Ag/AgCl is a common one in industry while Hg/HgCl is a common one in research. There ...
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Started by Rahil Khan
Is there anyone who has worked with HMC? We concentrate Pb and Zn minerals but tail density is close to valuable minerals so recovery rate is low, how could it be improved?
Last replied to by Rahil Khan
We can’t use flotation because the ore is carbonate and there isn't any effective way regarding this issue. Any industrial flotation practice about znco3 (we didn’t find,) if available, can help u...
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Started by Subhash-Kumar-Roy
How is Bulk Flotation different from Selective Flotation?
Last commented on by David
hmmm.... Native gold can be floated.
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Started by
I saw a really interesting presentation at the SME annual conference today (yes, I am a lead-zinc miner at heart so I am bias). To me it highlighted how really good science coupled with a bit of outside-the-box engineering can lead to better ways of ...
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Last replied to by Sturmbann
Thanks for your generous comments on my SME presentation. I only saw this discussion a couple of days ago so my apologies for not responding sooner.SME informs me that they captured the session my pre...
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Started by Zander Barcalow
Between potassium ethyl xanthate and sodium ethyl xanthate: what is difference in use of PEX and SEX in the flotation of sulphide minerals? Which the collector has the advantage?
Last replied to by Sachin Prakash
All collectors are hydro carbon chins with inorganic tip. There is no chemical reaction in any flotation. Minerals surface adsorbs inorganic element to keep hydro carbon free. Then mineral becomes hyd...
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Started by Standartenfurer
Does anyone have an idea of how to float valuable minerals (Ni) locked with Fe sulphide. Recent tests have shown that liberated well sized Fe particles as well as Ni sulphide particles locked with Fe sulphide report to the tails. The question is why ...
Last replied to by Rahil Khan
Ni-Fe: Mineralogy. It shows that Pyrite is interlocked with Ni. PYRITE flotation chemistry is different.Now if we target to float pyrite to avoid losses we need to follow operating parameters of PYRIT...
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Started by Helena Russell
Does anyone know how different gases (Nitrogen, Oxygen, CO2) affect bubble size distribution in flotation? Which gas makes bubbles smaller and more stable?
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Last replied to by Obersturmbann
Gases can play quite a significant role in flotation in a number of ways as you point out. We did a lot of research as well as plant trials with mainly oxygen and nitrogen starting back in 1992. Of co...
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Started by Sudhirkumar
I am working on coal washability by release analysis using froth flotation technique. I want to know the particle size range at which to perform for this case, also want to know how much pH is important for this analysis.
K
Last replied to by Kumar Choudhry
Conducting release analysis by lab scale froth flotation machine is an established method.As regards particle size range for a particular coal sample you can carry out the release analysis test for a ...
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Started by Gruppen
Does anyone have experience regarding the feasibility of controlling (via PLC) the air flow rate to a self-induced bank of cells? Wemco 120's used in coal flotation.
Last replied to by Gruppen
Thanks all for the feedback. We were indeed thinking a butterfly valve, but pondering the flow measurement due to concerns regarding flow restriction. This is somewhat of an experimental modification ...
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Started by
I'm trying to develop some batch froth flotation test with very fine ore (
Last replied to by
The optimum doses of reagents are dependent of the ore characteristics (grade, size, liberation) first; you need to develop a mineralogical study to obtain information about the ore. We need to know t...
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Started by Sachin Prakash
Our plant is a mixed Sulphide / Oxide Copper ore plant with acid soluble ratio in the feed of 14 to 20%. The ore grade is 1.8 to 2.2% Total Copper. The major sulphide mineral is charcalcite, Chalcopyrite,Bornite and covellite are minor contributors. ...
Last replied to by
The fundamental question you have to address is whether the gangue is physically entrained into your concentrate, or whether it is activated by your reagent regime allowing it to float as liberated pa...
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Started by
Help me with best depressants that will effectively reduce magnesium oxide in sulphide nickel concentrates and effects of MgO in the nickel concentrates
Last replied to by
There are a number of things which taken together will lead to high MgO in a nickel concentrate.•Locking and aggressive collector dosages.•Mechanical entrainment in the froth and long flotation ti...
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Started by Sandeep Bisht
I would like to try flash flotation in my concentrator. Anyone can help with vendors or share experience of proper test work procedures for flash flotation technology and testing?
Last replied to by Maya Rothman
It is presumed that your client wishes to evaluate flash flotation for an operating plant?Outotec has developed an excellent bench procedure for performing a first evaluation of flash flotation - nota...
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Started by Subhash-Kumar-Roy
As compared to the last decade at present there have been developments in flotation technologies which are more efficient. Therefore through this forum I would invite your opinion that in case a new plant is being constructed for coal beneficiation w...
Last replied to by Bob Mathias
We can certainly attest to the capacity of the HydroFloat cell to float coarse sulphides up to around 2 mm. We used a lab-scale HydroFloat cell in two PhD projects in our long-running AMIRA P260 flota...
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Started by Helena Russell
Does anybody have experience of working with WEMCO flotation cells to remove sulfur in iron ore reverse flotation circuits? Could it be a good choice for flotation of coarse and dense iron ore particles without any settlement?
Last replied to by
I propose to do some settling tests in laboratory with difference solid content, and then use lowest settling rate for flotation, but please note that in high concentrate pulps we will have some probl...
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Started by
What is the mechanism by which excess NaHS starts to depress valuable minerals in flotation?How do you know the point at which you are adding too much NaHS? Is it that the excess NaHS alters the electrochemistry in the pulp such that sulphidisation c...
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Last replied to by Standartenfurer
Just as a passing comment, I presume that the sphalerite is liberated. If this is the case, some form of activation must be occurring, although the addition of NaSH to the milling should precipitate t...
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Started by Sturmbann
I'm doing some froth flotation tests with Cu/Zn/Pb ore. When I increase the amount of frother the Cu recovery increases, and the Pb and Zn recovery decreases. How can I explain that? How can adding/increasing frother lower metal recovery?
U
Last replied to by Unterstarm
The problem is that their evidence should not use lime in bulk circuit that activates the zinc as you have high iron sulfide + you to use 200-300 gr / ton of sodium cyanide and 50-100 gr / ton of zinc...
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Started by Unterstarm
Does anybody have a laboratory procedure for fine carbon flotation when employing a batch float cell?
Last replied to by Raje Singh
Mineralogy & size distribution of the particle are the two main deciding factors in the processing of minerals. In your case, the fine carbon may be floated using kerosene or diesel in alkaline pH aft...
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Started by Subhash-Kumar-Roy
In coal flotation practices the use of modifiers (besides frother & collector) a standard and established practice•Are proven modifiers available in the market (just not claim by manufacturers)?•Can some case history or reference be made availabl...
Last replied to by
I think you have said it all here; these raw coals are not oxidized but contain some high proportion of fine clay & stone particles.So if you clean/separate the Raw Coal from the "Clay & Stone" the fl...
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Started by Hauptsturm
I want to float antimony and gold from flotation tail's, the results are:Recovery Au (%) = 60 %Recovery Sb (%) = 30 %Tail:Au = 3 ppmSb = 1.8%The 60% of Sb in tail is under mesh # 525The 30% of Au in tail is under mesh # 525What are the options to tre...
Last replied to by Maya Rothman
Have you done any diagnostic leach work to verify alkalinity controls and where the gold reports? With so much Sb and other heavy elements, a blind mineralogical study might be difficult to interpret ...
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Started by Raje Singh
We are running Outotec 50 m3 Tank Cells followed by Wemco Cells (8 m3), in Tanks we just float fines/ultra fines even gangue, but in Wemco it is desired flotation, is there any idea what is going on?
Last replied to by Tarun Karakoti
We encountered same problem in Zinc concentrate. Heavy gangue was floating along with concentrate. 80000 mt concentrate was rejected by smelters. We did R&D and found that big size bubbles entrap gang...
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Started by
Has anybody experienced extremely high natural pH (10.5+) in ore and hence affecting flotation? The high pH is inhibiting flotation and recoveries are dropping.Any ideas on how to overcome this, like dropping pH etc?
K
Last replied to by Kumar Choudhry
At high pH frothing effect gets reduced and flotation becomes sluggish causing high tailing loss. Increase frother dosage or reduce pH to 9.
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Started by Rahil Khan
Chromite separation from serpentine gangue. I'm looking to get started on this new project and was wondering if I could get some ideas before jumping into this blindly.
Last replied to by Marshal Meru
At the 2013 CMP conference a paper was done on the Successful Recovery of Chromite Fines. It was based on Case Studies from process plants in Turkey, and there is some good advice on chromite flotatio...
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Started by Rahil Khan
What factors can contribute to high frother consumption in a process?Let me just briefly share with you our process. The plant treats a mixed copper ore of Acid soluble (14 to 20) and AI 80 to 86% in ore. We use a frother which has a mixture of alcoh...
q
Last replied to by Subhash-Kumar-Roy
There are a few things in that affect the consumption of the frothers. Frothers help with the stability of the froth.If you consumption is getting high, perhaps you need to look at the type of Collect...
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Started by Kumar Choudhry
I have been assigned a project to investigate and optimizeflotation cleaner and re-cleaner performance. We have conducted surveys around cleaner and re-cleaner circuits and have found the following: Cleaner circuit recovery is better than re-cleaner...
Last replied to by Jean Rasczak
How is your investigation going? Have you been able to characterize the feed to the cleaners, the copper lost to tails, or what is diluting the concentrate?Next, are the upstream targets appropriate? ...
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Started by Obersturmbann
Mixing tanks need some sort of mechanism to avoid mixing ineffective-swirling motion. In my mind a flotation machine is a mixing tank that introduces bubbles into the mixture to achieve separation. Most of the textbooks I used when I was studying che...
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Last replied to by Obersturmbann
I just wanted to update this discussion with observations made from actual gas dispersion measurements (bubble size, gas holdup and superficial gas velocity). Measurements have been performed on one p...

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