Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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Started by Alex Loutou
Hello,I am currently working on a small gold processing flotation. An old mine which was rest for many years and started again in 2020. Mill feed grade: 150 TPD, Au 2g/t (rec 65%), Ag 100g/t (60%), Cu 70g/t (40%) The rougher machine is from xhin h...
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Last commented on by Alex Loutou
Thanks Jorge, I will work to see recovery cell by cell, as you said maybe there are some problem with mechanical. Cheers, Darrel
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Started by Pavaldiv
Hi,  I'm doing lab flotation testwork on a sulphide ore containing copper and zinc. The grade of the material is 5.7%Cu and 4.8%Zn, the main minerals in the ore are chalcopyrite, sphalerite and mamartite. It doesn't appear to be presence of oxidize...
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Last replied to by huahua
The flotation method is mainly to vulcanize copper oxide minerals first, then add copper complexing agents to form a stable lipophilic mineral surface, and then use neutral oil emulsion to cover the m...
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Started by ecublens
Hello, I have rougher flotation results. How can I determine how many stages of cleaning and scavenger flotation should be done according to these data? Is there any procedure for this?
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Last replied to by Jorge
If you performed rougher flotation tests and the results are acceptable, the next step to perform cleaner test. The key considerations are listed below, - It is necessary perform a new rougher test w...
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Started by ecublens
Hello, how to convert g/ton to cc? For example, I have a 1% KAX solution. I will use 30 g/ton of this, how many cc do I need to add?
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Last replied to by Jorge
I imagine you want to perform flotation tests. If you plan to use 1-kg charges, you should add 3 cc. Similarly, if you consider 2-kg charges, you should add 6 cc.
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Started by edson360
The PAX and Aerophibe dosages  upon 1000kg materials treated in roughing stage are 21mL to 7mL and 2mL to 8 mL respectively. The Aerophibe and CMC upon 1000kg materials treated in a  cleaning stages are 2mL to 6mL and 5mL to 15 mL
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Last replied to by Jorge
I imagine you determined the optimum particle size before trying to evaluate the effect of collector on copper and gold recovery. If not, you should do it. Although you did not mention the copper gra...
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Started by Gomolemo Thembo
Which collector is the best for floating the chromite fines from the tailings dam?
Last replied to by SmartDog
Generally either fatty acids or akrylomides are used for chromite, BUT... the actually selection is dependent on water chemistry,  mineralization of the chromite, other mineral specieces present, and...
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Started by Arip
Hi Guys, I am designing a CIP circuit for a plant in Tanzania, the lab PPM report has these results Ag 45, Cu 17, Fe 22,000, S 215, Mn 84, Au 10 Is there a need to put up a frother to remove the Fe before the CIP circuit or a magnetit machine will ...
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Last commented on by Arip
We have not done lab test for leaching, the issue is the iron oxide how do we treat it before leaching, maintaining copper above 10.6ph hinders copper being leached into our cynade solution
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Started by rgov1992
Hi all,   I would like some advice on how to improve froth stability and pgm flotation performance at low pulp densities of about 10% solids. Thanks
Last replied to by David
what frother are you using?
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Started by Aldry
Bonjour! je travaille sur un minerai  qui contient le cuivre sulfuré mais je fais face à un problème, c'est que mon minerai contient une grande quantité de carbones organiques qui me pousse à faire une pré-flottation et la question est de savo...
Last replied to by David
Seulement du MIBC. Tres bas volume.
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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 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 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 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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