Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)2017-04-04T06:57:31+00:00
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Started by Amare Goitom
Can anybody suggest in this, how do we depress pre-activated Sphalerite, due to secondary Cu ions, so as to recover the Cu and Zn in differential flotation? Sphalerite is floating in Cu circuit and none of the Cu could be recovered. my reagent schem...
Last replied to by Carlos s
Hi, you can try agregating 1,1.5 kg de CaO in the mill for to obtain ph 9.5-10 during this process, in the condittioner adjust the pH at 6.5 with sodium meta bisulfide or amonium bisulfide. The objet...
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Started by J. Neumann
We have a Pb/Cu operation.  We make a bulk concentrate and then float the Cu and depress the Pb.  We would like to evaluate using Carboxymethyl Cellulose (CMC) along with other new reagents in a Cu/Pb separation circuit to eliminate using Sulfur D...
Last replied to by Jorge
You can evaluate other options. See below, - Na2S2O5, 800 g/t; activated carbon, 400 g/t; CMC 250 g/t – Na2S2O5 , 100 g/t; Na2Cr2O7, 20 g/t - Na2Cr2O7 (pH 8.5) 450 to 1200 g/t.
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Started by SmartDog
A lot of questions have been asked recently about a copper/gold processing system, particularly the separating of them at the process plant.  Yes, this is difficult, partly due to the issue of gold being easily floatable and copper eating up a lot o...
Last replied to by David
Yep, I totally agree. Those new at this are excessively concerned with recovery and of each 'separate metal'. Too often I need to ask do you want to make metal or make money? Not the same thing.  ...
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Started by Hamid72
Hello everyone What is the best way to oxide ore flotation(copper,lead,zinc,...)? Do you have a good article or something else about it? Thankyou
Last replied to by SmartDog
Start with: https://www.911metallurgist.com/blog/copper-oxide-flotation
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Started by JDTaylor
I'm soon to be running a plant trial of ZnSO4 (as a sphalerite depressant). Where is the most effective addition point? Grinding or pre-flotation conditioner? Any references much appreciated. Thanks
Last commented on by naveen.singani
Adding ZnSO4 in cleaner cell will be very benefit. If we r adding in grinding it will depress Zn which we have to recover in Zn bay.
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Started by J. Neumann
I am looking to find the optimal distance from the bottom of the cleaner cell to the bottom of the rotor in a Wemco Cleaner 66" x 60" x 27" (approx 1.75 cu m) flotation cell.  Does anyone know where I can get a drawing of the optimal distances?
Last commented on by J. Neumann
We do have modified cells. We have been in contact with them, now waiting for an answer.
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Started by Gene Cheeseman
Hi Guys, We have been experiencing an interesting phenomenon and am wondering if anyone with a stronger hydromet background could explain why. We have been getting high levels of arsenic in our gravity ILR bullion.  We have been using hydrogen per...
Last replied to by Dave Tahija
The arsenic is not precipitating as scorodite at pH 12 as scorodite is only stable in acid ranges. You're  getting adsorption of dissolved As onto some metal oxide/hydroxide ( most likely ferric hydr...
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Started by Anzick Rex
It has been a common trend in flotation that the recovery of fine and coarse grains is low... I was thinking of using selective flocculation as a pre-treatment process to increase the recovery... is this possible?
Last commented on by Anzick Rex
Thanks David for responding.... I'm working on a phyllite mineralogy with pyrite as the predominant sulfide mineral... the metal is Au and the phyrite is barren (depressed at pH 9.5-11) but the gangu...
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Started by Azadeh
Hi I try to process galena and sphalerite ore in grade of 6% totally in flotation circuit. In this ore, the oxide part is about 2 -2.5%. so the overall recovery is low especially in sphalerite circuit. How can I increase the recovery of oxide part t...
Last commented on by Majid85
I am in Zanjan and This was my last job.
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Started by Tate
Im recovering an old tailings dump using froth flotation . The circuit goes in this order Milling - flotation- thickening - CIP - Tails .how do i get rid of the froth bubbles from getting into the CIP section as these are posing huge problems even at...
Last replied to by Tate
Woow thanks guys. Give me a week and i will share the feedback. Kind Regards
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Started by Adimulu
Dear All I troubled to fine literature on the production SOP fertilizer from sylvinite/carnallitite and kainitite. I want to understand the chemical rexn took place during decompostion and formation of SOP.
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Started by Hugo Delgado
There are different flotation circuits designs, each one different from the other, so, when we talk about flexibility on flotation circuits designs?, how can we know that? On the other hand, how can we measure the resiliency on this circuits? These ...
Last commented on by Azadeh
Thanks for your complete explanation.
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Started by marco.gerolin
Dear all, I'm about to start to conduct some experiments on froth flotation to separate some fibrous silicates form sand (which is still silicates sadly). SInce I have no experience with this technique I would like to ask you which could be a good c...
Last commented on by inOr
Marco, I don't think you are going to find affordable industrial chemicals fromm Sigma-Aldrich the usual handul of 'fine chemical' manufacturers. You need to find a supplier of bulk industrial chemic...
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Started by InsideMet
Hi All, I have developed a flowsheet to treat a copper sulphide ore that contains a significant level of talc. The flowsheet calls for doses of carboxymethyl cellulose (CMC) in excess of 300g/t to produce a saleable concentrate. The CMC will be purc...
Last replied to by David
Did you see https://books.google.ca/books?id=s4SsrmvEc7QC&lpg=PA154&dq=CMC%20Mixing%20System&pg=PA153#v=onepage&q=CMC%20Mixing%20System&f=false and http://www.inoxpa.com/products/product/mixing-uni...
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Started by mardin
I am working on a project to improve the flotation recovery of a mine. The mine is a lead and about 70 - 80 percent of the feed is a oxidised.  How can i improve the oxide lead flotation recovery?  
Last commented on by Josh Wright
If you have lead sulfides, I would float those minerals first. Then if you are floating zinc sulfides (not sure if this is applicable to you), I would float these next. Finally, I would float the lead...
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Started by JohnMills
Dear All, I want to carry out a pilot experiment for Zinc ore. Zn content is 10-20% with lots of Fe and Si. Could anyone kindly recommend the cheapest and best reagents for this type of ore? Many thanks! John
Last commented on by ChrisBucknell
The Zn will be oxidised in the slag so that will be difficult. Sulphidsation may work. Hydromet remains an option but gelling may limit it.
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Started by CenkUretencan
Dear colleagues, From which companies I can get commissioning sevices for the medium scale copper flotation plant, I would request commissioning plan, procedures etc, and on site services. I know such services could be provided by the giant enginee...
Last replied to by Todd H
Did you find a suitable company to help with commissioning?  I work for a small engineering company and could assist with the work. I have commissioned a lot of plants and have worked all over the wo...
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Started by peter.wilkinson
Are you able to advise the supplier of the reagent PE26 (mixture of CMC and guar)?
Last replied to by Nathan Sudom
You bet.  It's been used in the potash industry for quite sometime and lab testing has shown promise for it in certain copper/nickel flotation applications.  Testing has shown it to outperform PE26 ...
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Started by Pabloski
Hi people! I need some advise, or comments, on flotation processes strategies based on froth height control. If there is any process around that uses this type of control, or any paper topic related would be very much aprecciated. Thanks before ha...
Last replied to by Peter J
150micron is certainly a large size to float.  I suspect you need a stronger frother so that the bubbles don't break and the particle is carried to the overflow lip.  If you are not using "Dowfroth2...
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Started by artem89
Hi i need manual and list of equipment for pilot froth flotation 
Last replied to by David
I offer the newer: https://www.911metallurgist.com/equipment/flotation-pilot-plant/ https://www.911metallurgist.com/equipment/laboratory-flotation-column/
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Started by Robert
The effect of water quality on flotation is a common issue when designing and when operating concentrators. Liu et al. (2013) reviewed existing studies on water quality variation in flotation and developed a framework and analysis around three aspect...
Last replied to by Robert
Another useful summary of the impact of water in flotation was provided by the following paper: Levay, G., et al., The impact of water quality on flotation performance, JSAIMM, vol. 101, 2001, 69-75 ...
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Started by VictorP
Hi,  I am planning to lower the height of the vents in the blower room that supplies the air for the flotation machines, however, I wanted to see if there was any reason for the vents being designed so high (about 4-5m high). Reasoning is to make t...
Last replied to by David
Victor, the blower intake is up high so that ground borne dust and other contaminants dont enter the system. people walking etc etc = cleaner air
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Started by Bobson
My plant uses a rather unusual pH 8 Galena-Sphalerite bulk float. Main contaminants of concentrate in the form of Silica, Magnetite, Pyrrhotite and Fe amphibole.  Very high degree of liberation with minimal lockings - Entrainment is in part respons...
Last replied to by Bobson
We adjust the pH with sulphuric acid, use SIPX (sodium isopropyl xanthate) collector and Nasfroth 240 frother. The majority of reagent dosage happens at the head of the circuit.  The contaminants ar...
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Started by MineralFrothFlotation
Brightness of feed talc is in the range of 65-70 and color is grey . Objective : Final concentrate brightness >= 85 .  
Last commented on by MineralFrothFlotation
thanks Frank . I will conduct a flotation test work with alkyl hydroxamates and check the parameters ....
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Started by Pabloski
Hi peps! Is there anybody here that has done froath height tests to give me an idea to do one at the lab? At the moment I have a 4L transparent flotation cell available, so I was thinking of floating at different pulp heights, at differents stirring...
Last commented on by Pabloski
What your experience says?
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Started by Pabloski
Hi people, I want to undergo a flotation test to analyse the impact of froth depth over recovery, as well as the impact of air flow and rotor speed. My question is: What ways do I have to modify froth depth? Any recommendations on how to approach ...
Last commented on by Pabloski
Thanks for the input, Frank.. It makes a lot of sense, it will help me to know how am I related to my FEH. Could this FEH be calculated using standard frother dosage and measuring its height? and the...
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Started by artem89
Hello, my name is Artem Kurnev. I work in CETCO in Russia, in our research center we have canadian process technologies flotation machine. We dont know, how to configure control box? If you have manual, please post it here. Thank you so much
Last replied to by David
This one comes with a manual https://www.911metallurgist.com/equipment/laboratory-flotation-column/
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Started by Buka
I am working on a project to improve the flotation recovery of a mine. The current flotation recovery of that mine is 80% gold and 85% silver. Blending is done at the ratio of 75% oxidized ore and 25% fresh ore. How can i improve the flotation recove...
Last replied to by Robert
Characterise the ore: How are silver and gold present in the feed for major ore types- free, as mineral(s), liberated, locked, data by size, etc. How is gold present in the tailings for major ore ...
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Started by jayanath
how to remove/reduce iron oxide, aluminium oxide and chloride content in rock phosphate (apatite) by using froth flotation method. what type of collectors should I use?
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Started by Rezaghogha75
Need to float Cobalt from a Cobalt/pyrite slurry which has too much lime in it. what is the best acid to use for that? any specific methods suggested? I need to obtain 100 Kg of Cobalt concentrate Cheers
Last replied to by BAUD
The selection of the best treatment method for a particular mineral depends largely, among key factors, on the knowledge of: -the geology of the deposit, -the mineralogy of the ore  -and the distr...
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Started by Floatsumcon
Thanks in Advance. Currently facing float recovery issues with a long term stockpile having patches of medium / heavy oxidation of sulphides in gold ore. head grade 1.8 - 2.8g/t. Ore is  presenting black sediments ( gold in carbon)   @ 20 - 25% ...
Last replied to by David
It depends on your ore.  ORP drives it. In the laboratory, this have worked for me: read this also https://www.911metallurgist.com/froth_flotation/controlled-potential-sulphidisation-cps-demand
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Started by a.eslami
Hello  recently, I am working on processing of a gold bearing mixed oxide-sulfide copper ore (Av. Cu; 0.80 & Av. Au; 0.2ppm).  After some research and testing different methods, I found Controlled Potential Sulphidisation (CPS) Flotation as the...
Last replied to by David
Hi, my contact at http://basemetlabs.com/ gave me a couple of things for you: Not all copper “oxides” are equal.  Carbonates Azurite and Malachite respond really well to CPS.  Cuprite, not as ...
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Started by Niget T
I need something non toxic to suppress molybdenum and recently read Chitosan was tried, does anybody have information on this?
Last replied to by David
Hi, suppress molybdenum from what? Describe your situation please.
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Started by spaceexplorer
Are Oxide Ores Generally Amenable to Flotation Process? Hello All. How amenable are oxide ores to flotation process? We are considering developing an oxide ore deposit with average grade content of 2.4 gpt and 650 gpt (Au/Ag) respectively. Recent...
Last commented on by Frank
I agree with the comments other than to say that oxide flotation is not difficult but I am not sure this has much to do with whether you can float oxides or not. The steps that you need to take are ac...
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Started by Fati
Could you please suggest me some depressants that depress only carbonate and not apatite minerals
Last commented on by Fati
Thank you Marshal Meru for your answer, it's an interesting article... but I'm looking for carbonate depressants because I'm planning to direct float apatite while depressing carbonate minerals.

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