Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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Started by Brian benedict
I am working at a mineral processing laboratory my problem is we want to analyze an oxide ore containing nickel and so i am searching for a geochemical analysis of nickel and a proper design and parameters for froth floatation of nickel including dos...
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Last replied to by Jorge
A flotation testing program on nickel ore with an important degree of oxidation should evaluate the effect of sulphidization. The typical reagent is NaHS. The collector is a xanthate, Potassium Amyl X...
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Started by Maryam
Recently we received a bad quality of NaHS (red color), I need please to know the specifictions of the NaHS reagents which impact the sulphidation of oxidized copper.. if there is someone who can help me
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Last replied to by Jorge
Sodium Hydrosulfide (NaSH) is a light-yellow colored solution with a pH of 11 to 12. The usual strength is around 42% w/w and has a rotten egg smell. It is necessary to prepare a solution (e.g. 20% w/...
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Started by Teggry
Hi, I am setting up a intrinsically safe zone for our PAX mixing and was going to put a spill kit in the area. I was told by a metallurgist that a Hydrocarbon Spill kit would do as opposed to a chemical spill kit. Is this plausible?
Last replied to by SmartDog
It really depends on what you are storing and using.  First off there are three main types of spill kits, hydrocarbon, chemical, and general purpose.  Hydrocarbon kits are general kept around furl ...
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Started by Boikanyo
I conducted rougher Cu-Pb-Zn flotation tests and would like to calculate the recovery of the target metal in each circuit (example: Cu in Cu-circuit) as well as the % wrongful recovery of the other 2 metals (Pb and Zn in Cu-circuit). During testing I...
Last replied to by SmartDog
If you use feed, concentrate, and tails in the calculation, you will seldom (read almost never) get 100%.   This has to do with with timing of the recovers and other factors such as accuracy of assa...
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Started by joshuasungsu
I am working for Cu/gold mine. We have an unusual high mercury in our concentrate. We had below 1 ppm mercury but we had over 40 ppm mercury. Do you know how to depress mercury in the mill?
Last replied to by David
Whatever mineral it is associated with, that mineral you need to avoid locking with your copper. Do you have a regrind?  Get liberation data on that side also. Your rougher concentrate needs 97% FREE...
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Started by luiswesmoles
Hi everybody. In my work, I´m using a Betachem´s Bikerman equipment to measure the heigh of the froth bed. Also, I want to measure the bubble size. I´m taking photos at every test that I do, but when I want to process it in a software (ImageJ), I ...
Last replied to by David
have you tried any of these?
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Started by Yrstruly
Can somebody please assist. I have the following data and need to present it visually. How and where do i start? https://drive.google.com/file/d/1uFf0W5qw1YuG07xWJ8U3rYx7NGUFtCIo/view?usp=drivesdk And https://drive.google.com/file/d/1uCPMV8x21Iyvt...
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Last replied to by Todd H
Identify the variables that impact the outcome - like those shown in your third link.  Then aggregate the data into groups for each test set. Usually you want to look at the data as it impacts recove...
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Started by waleed
Dear All, Can any one suggest me best alloy/Material that can be used in 60% concentrated sulphuric acid and sustain at 300-500 F temperature..? our Industry Purpose, usage of hot oil in tubes of that material to generate heat, this tube will be d...
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Last replied to by Jorge
I think you can evaluate the potential application 904L stainless steel, which is a super-austenitic stainless steel. This kind of steel includes the presence of copper to greatly improved resistance ...
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Started by mardin
Hi Dears, Can anyone help me about the processing of lead whose minerals are serosite and contain more than 20% iron? The lead grade about 4% .  
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Last replied to by Jorge
At that time, you did not provide all the information (e.g. K80, flowsheet), your position is understanding. Probably, to avoid to share many data, you should contact a met lab. 
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Started by Yaseen Ahmad
a copper ore (calcopirit main mineral) is working in 500 tons/hour capacity 3 shifts. the system consists of rough flotation and cleaning flotation. rough flotation gain efficiency 85% how many cells are required in rough flotation ( cell volume is ...
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Last replied to by Jorge
In order to determine the flotation required to operate your rougher flotation circuit is necessary to perform a testing program to provide some key information. It is important to determine the optim...
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Started by metaltec2020
Hello Everyone, We are looking into purchasing a Gold Flotation Plant (it'll have a jaw crusher, impact crusher, ball mill, knelson concentrator and denver flotation cell). My question is, what are the next steps after scraping off the froth or foam...
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Last commented on by Herbert James
I am very interested in your subject, can we talk about it in detail?
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Started by kdchitaukire
How best can I float Ni sulphide ores containing chrysotile?
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Last replied to by Jorge
See link below https://www.911metallurgist.com/froth_flotation/mgodepression-in-ci-niflotation/
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Started by meena
hi All, Can anyone advise me if Guar gum can be used as a depressant in flotation in Gold mine processing? Guar gum is an effective depressant for talc but also depress pyrite. Is there a way around not to depress pyrite?
Last replied to by David
Is there a way around not to depress pyrite - yes, simple. Don't use depressants 
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Started by mardin
dear friends, we have a problem in the recovery of lead in flotation plant. our feed  consists of oxide minerals, and we have a lot of froth in our cells especially in the rougher. the froth is poor, that means its density is low, and recovery is lo...
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Last replied to by Jorge
If the ore is partially oxidized, it is important to determine what lead oxide minerals are in the ore. A mineralogical study is very useful to know it. The addition of Na2S is useful to promote the f...
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Started by Millza79
I am looking at a flowsheet, where the Rougher bank tailings (with six mechanical) cells reports to final tailings.   Do you think there is a necessity to have a separate Scavenger bank to treat the Rougher tailings, or is six cells in the Rougher...
Last replied to by SmartDog
It depends.  It depends on a lot of factors that can only be answered by test work. Some plants have only 1 rougher, others have many more.  Some plants have rougher/scavenger circuits others do no...
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Started by BrantT
Hi.  We have a bank of 6 DR24 Sub-A cells which we are recommissioning.  These are self-aerating though want the ability to add LP air to increase the pull rate if need be.  Would anyone know where this air should be added?  According to the ori...
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Last replied to by BrantT
Thank you very much Jorge for the link.  Very informative once again. Cheers Brant
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Started by Lubricants
What is the influence of used oil in the flotation process of platinum and gold and how can you mitigate?
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Last replied to by Jorge
It is possible to expect overfrothing. The operator should be able to detect the problem and try to reduce the addition of frother. The problem is related to the froth stability. Sometimes, increase t...
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Started by rockhound193482
We shut down last November when it was freezing, up to that time we had no problem with an abundance of froth in the rougher and scavenger cells.We were successfully grinding and floating a black sand concentrate with extremely fine black sand and ve...
Last replied to by SmartDog
This can come from several different factors from the gold not be being free and as such you do not have enough surface area on the particles for bubble attachment enough to float, to having too much ...
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Started by Gene Cheeseman
I am currently working on the design of a small 400 t/d gold flotation circuit that will consist of (28)  DR24 equivalent 50 ft3 SubA flotation cells. (inclusive of rougher, scavenger, & cleaner circuits) What type of blower is best for this kind o...
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Last replied to by BrantT
Hi Gene, I'm in a similar boat as yourself in setting up a 250t/day gold float plant using DR24 Sub-A's.  Even though these cells are self-aerating, i would like to add air to each cell to provide s...
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Started by baja_patient
Dear All, thanking you all humbly for contributing to such an amazing forum, I am a big fan! I've been historically very involved in all kinds of forums and I value them very highly.  Now to my question, i've recently been given an old Wemco/Enviro...
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Started by
Dear all ,  i'm lee from China , our company is one supplier of the floation reagent , mainly product is sodium sulphide and sodium hydrosulphide solid ,   but i do not know what kind ore floation need our product ,   cooper mine or gold mine ...
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Last replied to by bsat5564
Hi Lee, NaHS is used as sulphidisation agent for oxide and oxidized copper ore in copper-gold mining
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Started by Joackim82
Dears, What are the uses of starch in mineral processing?
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Last replied to by Jorge
Starch is a flotation reagent. Many varieties of starch may be used, e.g., rice, wheat, potato, maize. It can be used to control the interaction between clays and and a valuable mineral. Obviously, if...
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Started by Joola68
I flot 2 conc Cu and Co. Xanthate in return water is activating the Co in Cu flot, which we don’t need . Any ideas how to destroy Xanthate in return water . I’ve tried ozone expensive but works 
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Last replied to by
hi dear, our company supply cheapest sodium sulphide and sodium hydrosulphide from China , if you consume it we can supply quotation . 
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Started by Henryezra
Hi all, is it possible dosing excess ZnS04 to the grinding circuit to depress Zn in the Pb circuit would affect Zn recovery in the Zn circuit? On several occasions we had very poor Zn recoveries when using the reagent, and adding more than the usual ...
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Last replied to by
hi dear , do you need the Na2S and NaSH  ,  our company focus on this two products , if you used it we can supply quotation .    
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Started by Ryder1337
Hello,  Our pit right now is in a big batch of oxidized ore, there trying to split feed wither another cleaner ore body.   Our cleaner recovery is always good, it’s just our rougher recovery always drops about 5-8 percent when we get into this...
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Last replied to by
hi , dear our company is supplier of the sodium sulphide and sodium hydrosulfide from China , if you need it we can support it ,
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Started by Math Nope
Hi, What is the optimum method to recover fine cassiterite (270 - 400 mesh)? Thanks.
Last commented on by Math Nope
The liberation degree of our tin ore is low and tin mineral distribute relatively same in each grain size. We have conducted some test but no result can achieve our target (optimum grade and recovery)...
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Started by Lawrance
Normally when treating old dumps for PGM recovery, the material comes with vegetation and it generates an amount of wood chips which are know to absorb reagents(particularly xanthates) any ideas how to quantify the wood chips and how to quantify the ...
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Last commented on by Lawrance
Thanks for your reply Jorge.
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Started by Millza79
I was reading about a chlorite pre-float. Is this common? I have never heard of it before (know of multiple talc and carbon pre-float applications).
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Last replied to by Todd H
It depends on what is in your ore.  If you have fast floating gangue sometimes it makes sense to remove it first. Regards
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Started by khans318
I want to perform Ni sulfide flotation in a 1 L laboratory cell. But after adding the reagents, starting the reaction and collecting the concentrate the pH of the pulp decreases. So we have to add soda ash further to adjust the pH again to 10.1 which...
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Last replied to by Jorge
A similar situation is typical of copper, lead and zinc flotation. The pH decreases after removing the rougher or cleaner concentrate. The reason is the presence of sulphides and the galvanic interact...
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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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Last replied to by Craig Hutchinson
I can address a few issues in general terms. Regarding your question about which operators are using SlamJets, EFD has thousands of installed units across a broad spectrum of flotation and leaching a...
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Started by Steve
Hello, my query has two volleys that may be related. What are few tips for dealing with high clay copper sulfide ore in flotation. When we get batches of high clay ore, our recovery drops drastically, rougher cells start pulling more than usual. Ro...
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Last replied to by Jorge
It is a little strange that the testing program did not test this kind of material. Based on my experience, when you are in the operation treating this unusual ore, one partial solution is to reduce t...
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Started by phanindra
Copper sulfate is one of the reagents in Zinc flotation.  Zinc sulfate is present as an impurity in Copper sulfate solution.  Does this impurity have any negative effect on zinc recovery?
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Last commented on by miloudche
I dont think that small amount of Zinc sulfate can impact, Copper sulfate active Zinc sulphide flotation (if there is pyrhotite can be actived by CuSO4 then flotation of zinc will be less). 
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Started by LATORES88
Hello. I am lost I need to get % solids of a slurry with ore and FeSi in a stream of DMS Cyclone ore 28.3 tph @SG =3.05 FeSi  115.8 tph @ SG =6.80 SG slurry=3 Can anyone help me?
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Last commented on by LATORES88
Usefull
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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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Last replied to by Todd H
HPGR is not a replacement for SAG milling - different reduction ratios and cost.  HPGR are expensive per unit of mass treated and not good secondary size reduction equipment. Regards
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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.
K
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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