Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)2017-04-04T06:57:31-04:00
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Started by
Should base metals concentrators use collectors other than xanthates? For example, dithiocarbamates etc? Xanthates have been used for a long time. There are other types of Flotation collectors that can be more selective against pyrite and pyrrhotit...
Last replied to by Vanja J.
Hey, people, I have another question. How can I remove water from alcoholate? Maybe this is a stupid question. I saw something that this could be done with lime, Na2CO3... and zeolit columns. Is the...
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1027
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Started by Gruppen
I was thinking of submitting an update on our new LTM flotation electromagnetic level probe for flotation plants. I tried to do a search first to see if anything about this subject has been published. Watch this space though. I'm waiting for my clien...
Last commented on by Admire
Hi Raymond,can i get a quote for the LMT2 we may need a couple of them because we are currently using the mechanical based based systems that are without a surprise problematic.
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7130
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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?
Last commented on by anton
Can i get video,( galena separation ) my email antomonica0762@gmail.com, thank you
48
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1771
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Started by Gruppen
For a number of years a mine struggled to float a sulfide mineral and was getting less than 50% recovery even after installing a rotor and stator “upgrade”. We did minor modification to the rougher float cells and achieved a 19% increase in recov...
Last replied to by Raje Singh
Would you please suggest that what are the reliable laboratory test works which would provide the ultimate clean ability of a particular raw coal through fine coal beneficiation processes?Suppose we a...
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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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1254
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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?
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...
10
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918
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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...
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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2091
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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...
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...
24
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Started by
I was wondering if anyone is checking into "free Xanthate" or "residual Xanthate" in flotation circuit; specifically in copper flotation.It's more common in Gold leaching to always keep tabs on your "Free Cyanide", but in Copper flotation there is ve...
Last replied to by OberstGruppen
The desliming supposed to be at crushing classification stage and to reduce the potential difference of such galvanic coupling present, I use to apply interactively during grinding stage H2O2 of 10 V/...
4
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1500
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Started by Maya Rothman
I want explanation in ore processing of flotation of rare earths ore monazite ex which adequate collector and which depressing for minerals of gangue to knowing oxides, carbonates silica and apatite.And another question how of extracting monazite fro...
Last replied to by
Selective flotation of the monazite is the difficult part.Use of either of these collectors works well. However, they are also great collectors for many of the commonly associated gangue minerals. The...
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Started by Marshal Meru
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 attai...
Last replied to by Sturmbann
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....
6
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941
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Started by Oberfuhrer
I'm working on beneficiation of Barite ore which contain about 64% BaSO4, 22% SiO2 and 5% PbO.Does anyone have any experiences on separation of galena from Barite?
Last replied to by Oberstorm
That is a standard approach for a selective flotacion of Ba containing Pb-Zn sulphidic ore/ First sulphides out and then BaSO4 flotation with a liquid glass for a depression of Al and Si minerals and ...
6
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Started by Bob Mathias
What type of starch and how much is typically used in the flotation of hematite?
Last replied to by Raje Singh
QUALITYOF CHEMICAL:• Starch used is a specially made for flotation. It is made at very low temperature. You need to buy only from those who are supplying to Iron ore beneficiation. Others do not wor...
2
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714
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Started by
We travel the world talking with Processing Managers and maintenance personnel who all seem to want the same thing in their plants, Greater Throughput and Lower Cost. And why not! I mean, who wouldn't like to get more for less? Would you? When we a...
Last replied to by
That’s right, TEi Steel Trommels are 100% steel construction.TEi Steel Trommels are a completely consumable item with a solid screen and not panels. The increase in open area is principally achieved...
11
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Started by
I am seeing a grey /white deposit on stainless parts in a zinc flotation cell. The deposit is hard and can only be removed by HCl. Anyone seen this and know what it could be? I would like to prevent it happening. Do you think Zinc Sulphide from Spha...
Last replied to by Helena Russell
I must admit I would have said no, but then I remember the situation at Black Mountain when Anglo-American took over from Gold Fields. Although another Cu-Pb-Zn orebody at Aggeneys, the reason for the...
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Started by
Anybody with experience on Asbestos fiber rejection in copper flotation circuits. We have suffered high asbestos in our concentrate and have no solution for now.
Last replied to by Subhash-Kumar-Roy
I worked on a low grade Ni project for a few years where the ore was from an ultramafic deposit. We had a lot of success with a hydro cyclone used for fiber removal before the rougher float. Once the ...
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1940
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Started by Obergruppenfuhrer
My colleagues are developing an artificial vision system that analyses the froth flotation process, I am very interested to get involved in this development but I'm not really familiar with the parameters they are analyzing. I've heard of the followi...
Last replied to by Tarun Karakoti
Yes what you say is correct. There are standards we need to look at and adopt. Due to lack of knowledge in operation, many neglect these points. Many operators are discourages for their hard work in p...
9
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Started by
Does anyone have any information on how to strip thiophosphate flotation collector from sulphide concentrate on a Laboratory scale?
Last replied to by Sudhirkumar
Target the final tails should not have more than 1 % sulphur for compliance of environmental management.May think or try the following route•Float chalcopyrite and pyrite together as bulk concentrat...
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Started by Nickbob
What is the idea on the above mentioned exercise? When you do size distribution on a set of sieves, what does the weight ratios help on flotation?
Last replied to by David
Hi Nico,I do not understand your question...
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Started by
If you are doing batch flotation tests in the lab for evaluating reagents, grind size effect and grade/recovery improvement, does the Percent solids have to match plant Percent solids or it doesn't matter. Also if can refer to me to notes/text books ...
Last commented on by David
Thanks for you input Nicomedk, Here is a test group on flotation density and is impact you make like to review and comment on https://www.911metallurgist.com/blog/effect-of-flotation-cell-size-labor...
3
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773
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Started by Obergruppenfuhrer
I am trying to upgrade bismuthinite to 10% from bulk float conc. containing pyrrohite, pyrite & some copper minerals. Currently using lime and NaCN to depress gangue minerals. Has anyone done this before? Am not yet looking at slurry electrowinning p...
Last replied to by Gruppen
What is your starting bismuthinite grade in the bulk concentrate? Of the two iron sulphides, which one is the predominant - pyrrotite or pyrite? What kind of copper minerals do you have? Finally, h...
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838
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Started by
In my flotation circuit, I need to increase recovery of Au in flotation of Cu from 0.8% to at least 1.0%, does anyone has the experience how would be the best practice to obtain this? I will appreciate your advice.
Last replied to by
I am still working in getting data to be examined and to be able to take a determination. I am still working with the geologist to make a closer study of characterization of the ore and tails and the ...
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Started by Obergruppenfuhrer
Laboratory batch flotation testing generally involves the determination of recovery for a given component of the system, for example copper or gold. The method used to calculate recovery is not as straight forward as you may.
Last replied to by
The sample selection is vital to have an answer on what a researcher is trying to find. I agree with that. It is also very important to understand the system sampling and assay errors. Every system is...
4
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Started by
Can anyone help me about the production cost of Pb Zn lead and zinc concentrate with flotation plant?
Last replied to by
Thanks for your comment. Actually, I am doing a research and I want to compare different flotation plants process costs.
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Started by
Estimados, soy ingeniero de minas e se poco de lo que voy a preguntar: ¿Para recuperar oro de los sulfuros una alternativa es colocar el mineral en hornos hasta que se hay oxidado el sulfuro, además de eso tengo entendido que al pulverizar en menos...
Last replied to by Helena Russell
Tu como minero debes saber que en algunos minerales de sulfuro, contienen como sub producto el oro en bajos ppm. Comúnmente mediante el proceso de flotación sulfuro se recuperan como sub productos; ...
1
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Started by Marshal Meru
Surface Analysis versus Mineral Chemistry Fundamentals. Systematic flotation fundamentals anyone? We have learned, 'on-the-job', some basic flotation lingo as process mineralogists, but is there some basic stuff we're missing? We know of relative flo...
Last replied to by
Is the "Fe on the surface" of pentlandite and sphalerite comes from Ni/S or Zn/S depletion of this surface, from the Fe content of the mineral, or from precipitation of Fe ions arising from the galvan...
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Started by
Do you know a mineral of molybdenum with unacceptable floatability? Molybdenum is a valuable mineral which could be found in porphyry copper deposits and molybdenum is the main mineral of molybdenite. According to our recent studies we have observed ...
Last replied to by
I am a late entrant to this discussion. As per SME Mineral Processing Handbook there are 12-14 minerals of Moly but the main is molybdenite. Molybdenite is naturally floating and there should not be a...
6
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Started by
Can you list the factors affects the floatability of pyrite from refractory low grade ore.I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC , pH and others like pulp densit...
Last replied to by
From my understanding, you would like to get a high pyrite flotation recovery because the gold is locked in the pyrite. And you are trying to analysing the effect of various factors on pyrite flotatio...
13
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838
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Started by Zander Barcalow
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? The point is our feed slurry is pumped directly fr...
Last replied to by
I think you need to be aware about the froth carry rate limit so that could be easier to understand the stability of the froth. Also the type of the reagents employed such as collector type, frother, ...
6
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1408
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Started by Jean Rasczak
Can anyone suggest what will be the next process after processing and beneficiation of low grade graphite ore by froth flotation? What flowsheet is my plant needing and how I remove coated graphite form the clay particle after flotation?
Last replied to by
It's a matter of how you design grinding and classification process before the flotation. If there is overgrinding problem in the process you will have graphite slime coating on clay particles and thi...

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