Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)2017-04-04T06:57:31-04:00
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Started by engwayu
I am designing a laboratory pilot scale column flotation cell to be used for testing different mineral systems by flotation. I am considering using a jetting air sparging system to mimic industrial practice. I am leaning toward Eriez's SlamJet system...
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Started by Nikita Gupta
Can the current SAG mills be replaced with High Pressure Grinding Rolls (HPGR) for producing Zinc and Lead Concentrates? Will the equipments have to undergo any change when HPGRs are used instead of SAG mills? Can someone illustrate the points to be ...
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Started by fatihgok
I am trying to float sphalerite which is contain 6%zinc. But, zinc concentrate contain also 15% arsenic. So I am trying to get rid of arsenic. How can I remove arsenic from zinc concentrate? Could anyone help me? Thanks for your assistance.
Last replied to by K@TTU
As todd mentioned , i have also suspect the arsenic present in Zn ores are commonly arsenopyrite form , Please conduct detail process mineralogy and try to depress it by varing the pH, there is scope ...
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Started by mardin
I would like to know about the effect of the weight of added Na2S to the ore (for example 3 kilo per ton) in final concentrate tonnage.
Last replied to by SmartDog
Maybe a lot, maybe nothing. Depends on your ore, your other reagents, and a lot of other things. You have to run lab & pilot plant tests to tell.
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Started by sbreen73
All, We have been having issues with plugging on the discharge of our vertical froth pumps? This is in a copper mill. When we opened up the pipe we found that much of the diameter of the pipe was covered in a buildup. Please see the attached picture...
Last replied to by Matt
Hi sbreen73, Did you analyze the sample? What pH does the mill typically run at? Regards
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Started by mardin
In our factory, by determining the monthly production amount, the actual amount of concentration is usually different from the computational amount of it (always the actual is more with the significant difference. The amount of feed is completely c...
Last replied to by Jorge
The difference is related a several factor. For example, samples were not taken when the plant was at steady state. Usually, the sampler takes samples without knowing the status of the operation. The ...
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Started by newmet94
Greetings everyone, I am working with a project involving a refractory gold ore where arsenopyrite and pyrite carry disseminated, sub-microscopic gold particles. There is little (only a few percent) free gold in the ore. Currently, the sulfide flot...
Last replied to by Shani
Hi there! I agree that Xanthates should be replaced and that it can be done. I have worked on a few projects where kinetics and overall performance was improved with DTP blends from Clariant - Copper...
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540
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Started by longz
I want to decide on which valves to install on flotation bank cells in our scavenger circuit. Each bank has three cells. I am looking at improving level control and circuit mass pull for better recovery in the circuit. Mill feed throughput is 70tph. ...
Last replied to by Steve
David, What does the siphon breaker do for the pinch style valve?
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343
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Started by florenc
Hi, I have a clear Calcopyrite ore and want to calculate the qty of Cu concentrate, can you help me with the calculation formula of it. Al so i need the formula when we have Cu & Zn. Thanks
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Started by rdbebb
I have been closely following the flow-sheet development at the FPX Baptiste project.  Recently, they have successfully floated out a high grade nickel concentrate, leaving a decent magnetite by-product in the tail.  But I suspect that a few percen...
Last commented on by Khosana
We have just done a test recently using column flotation and it works.
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Started by Millza79
Does elemental or native Sulphur typically float?
Last replied to by SmartDog
Yes
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410
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Started by FAG
I am looking at how to make mass balance during a survey in flotation, would you advise me any reference solid mass balance water flow balance   Thanks, 
Last replied to by Jorge
Follow the link below, https://www.911metallurgist.com/blog/flotation-circuit-material-balance-excel
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472
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Started by Sloan
What kind of "routine" test work would you recommend doing in the lab to be able monitor the plant performance to see whether it is running efficiently and pin point the areas that require improvement?  Please consider a plant that is struggling wit...
Last replied to by Sloan
Thanks for the response . Yes it is a copper sulfide flotation plant.   In our operation the rougher con reports to cleaning circuit (columns) after passing through regrind. Cleaner tails reports t...
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Started by Millza79
How much mass (kilograms) do you need for a locked cycle tests. Assume 6 cycles.
Last replied to by Jorge
If the batch cleaner tests were performed using 1-kg charges, you need 6 kg. But, if you used 2-kg charges, it is necessary to consider 12 kg. 
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Started by Graeme
I am currently running a batch flotation experiment on a polymetalic base-metal sulphide deposit, I am having issues with the bench top flotation tests. Operating conditions:  I am floating Cu, Pb and Zn at the same time (run time 20 mins) My che...
Last commented on by Graeme
Thank you very much for your response, I will continue my flotation experiments in 3 days time. I will however be operating under the higher frother dosage. I have had other flotation experts advise o...
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Started by ahmethasyamanlar
We have a problem in the calculation of flotation concentrated tonnage. Flotation circuit is taking place in two stages. Getting Cu-Pb bulk concentrate first stage and getting Zn in the second stage. I use two product metal balance formula. Bulk con...
Last commented on by ahmethasyamanlar
Thank you for your comment. I'm looking for different perspectives. I'm already doing experiment and checks.
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Started by mardin
Hi everybody I have a question about flocculent, is there anyone help me? What is the effect of flocculent on the lead concentrate ore zinc concentrate or copper concentrate? is it change the nature of Pb concentrate?  best regards
Last replied to by SmartDog
Flocculants are used to improve the settling of finely dispersed solids.  They do this by adhering a coating of one molecule to the surface of the particles to make them collect in groups called floc...
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Started by Azadeh
Hi Dear friends is it possible that the nature of the PbS and ZnS concentrates change during a period of 6 months or more? the concentrates are dumped in an open area with no cover. thank you all
Last replied to by Dave Tahija
If there is any pyrite in the concentrate and moisture is present, galena can react as the anode in a pyrite-galena galvanic cell. A recent description of the reaction is in: http://www.minproc.pwr.w...
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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 Azadeh
Dear Majid85 sorry for delay I'm talking about Sormeh Company in Fars Province. the collector in sphalet circuit is PAX
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295
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Started by Torea Ranokeng
I am doing a flotation test for my undergrad. I have done all the necessary calculations including grade for each time interval. So, how do i calculate cumulative grade so that i can plot grade-recovery curves?
Last replied to by SmartDog
You might want to look at the general topic of metallurgical accounting/balances: https://www.911metallurgist.com/blog/metallurgical-accounting-formulas What Jorge gave was a specific example of thi...
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610
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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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552
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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 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 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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