Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering 2017-04-04T06:57:51+00:00
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Started by anjanisail
During designing the flow sheet of Iron ore Mines I encountered a problem. Initially during the sampling of ore from its faces of mines it was decided that Feed grade of the Iron Ore was like Fe= 63.2% Sio2= 2.8% Al2O3= 2.9%. Fe value fixed for the ...
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Started by Judeila
Dear Sir/Madam, Good day! I would like to request for your assistance in selecting inline instruments (brand/model) in measuring % solid (ores) and water in Filtration process of mining plant. Its output signal will be monitored by controller and d...
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Started by Munyabrwn
Greetings Metallurgists, I recently got 2 job offers as Graduate Trainee/Learner  from a gold mine and the other from a diamond mine. So my question is which is the best route to take and why ? I hope to hear from you soon.
Last replied to by David
Gold
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Started by Dannyoung
Please, i have been given just the mill throughput of 300tph of a free milling gold ore to estimate the capital cost for purchasing and installing comminution and CIL circuits. Kindly assist me.
Last commented on by Dannyoung
I needed the list of major equipment and the direct and indirect estimated costs.
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Started by Fachrifaa
Hello Guys! I wanna ask something silly yet it's disturb me,  can someone suggest what sampling method i should use, if there is a 100 Kg of ore, and i want to do a leaching test with only 0,15 Kg / Leaching test. is it ok if i split it to 12,5 K...
Last replied to by Bob Mathias
Best split 'till the weight of the ore is 150 grams. Better yes is to do your leach test with 1000 grams
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Started by SaveMetals
Hello All,  I am trying to separate two different aluminum alloys in scrap that I'm processing where one alloy is significantly more pure (higher value) than the other. At the moment I'm thinking of trying to rod mill to reduce the size of one frac...
Last commented on by denverphil
Oops, could blow less far if surface area high. It doesn't really matter so long as one goes further.
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Started by Aldeenor
Hello All! I am a newbie in this silica sand and washing things. I have a few very basic questions below. I hope all the experts in this forum can help me out. What does it mean when somebody is asking for Silica Sand with 99.5% SiO2? What is the...
Last replied to by Unterstarm
Hi Aldeenor I will try my best to answer your questions and thanks for seeking help, it is a strong point but still that is not the answer to your question 1. Silica sand with 99.5% simply means tha...
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Started by Chewe
Good morning. My question concerns how to determine scale up factor of agitation leaching vessel in a leaching cascade. I'm doing leach tests for cobalt recovery from slag but the problem is in a batch vessel i'm using in the lab i have observed some...
Last replied to by Chewe
Thanks Todd. I have also observed that material gets stuck behind the baffles. Which makes me wonder if they're really that relevant if you can achieve a perfect solid suspension. The idea of using pu...
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Started by louwrens
Just need some confirmation on whether the correct and most accurate manner of testing recovery of material placed into a cil plant let’s say 30000tonnes of ore out of a plant with capacity of 150 000 tones of ore is indeed to do a bottle roll test...
Last commented on by labadi
Hi John. May be my question is a litle bit out of the context of this discussion, but we are facing a dilema, regarding P80 x recovery: there is an information that some tests showed a CIL recovery de...
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Started by Tsaone
Is it possible to recover a flocculant in a slurry after water separation?
Last replied to by Tsaone
thank you guys. but since you guys says flocculants breaks and lose structure, what about polyampholytes? because many of the have have self healing feature and high tensile strength. Or the forces w...
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Started by mohammed_tawfik
Any one know where to get double beam AAS suitable for mining preferred new Hope to get help soon
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Started by McDeejs
May you list mining equipment that have low reliability and requires standby equipment on a plant setup  
Last replied to by Abduzhabor
Additional reserve hydrocyclone in the cluster, and if there is filtering - a reserve filter.
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Started by Donard ZM
Hi, I fail to know exactly amount of sodium cyanide needed to leach the gold ore with a certain amount let's say 5 ppm,please help me a nice calculation relates the amount of gold in ore, capacity of leaching tanks. Thanks.
Last commented on by Yves
I will tend to disagree with the suggestion above. The reality is you cannot use Stoichiometric calculation to complex ore in real leaching plant. If you had some experience in that field you will not...
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Started by Marshal Meru
Hi, I am looking for a centrifuge to dewater the -C5 fraction from a cyclosizer.  Do you know of where I could get one? Do you have an alternative to?
Last replied to by mellers
Hi Marshal, it is worth you sending the required dewatering duty to me, we make both solid bowl and decanting centrifuges. regards mike
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Started by mohammed_tawfik
hi  we are  starting new gold mine in Egypt  on small scale , using vat leaching   we don't have atomic adsorption device to calculate the gold concentration in ppm  my question is about manual methods of determination of gold concentration ...
Last commented on by mohammed_tawfik
and what about carbon assaying for gold
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Started by Katya
Has anyone been involved in tin-copper tailings benefication? The main challenge is to beneficate tin. Most of it (approximately 60%) are distributed in grain size -40+10 microns We carried out several laboratory testing on gravity concentration an...
Last replied to by Treve Mildren
The MGS is certainly the best option for fine tin and will work a treat in the size range you are suggesting.
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Started by KNP
Can anyone who have come across with the assaying method of gold ores using titration method assist me with some methods on how it is done. currently we are doing wet assay DIBK method and we want to try some other assay methods
Last replied to by Todd H
There are a few titration methods but most people don't use them - AAS is very cheap and accurate and is the preferred choice for wet chemistry.  ICP has also been utilized.  Here are a couple of li...
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Started by Robert
A set of lecture notes by Dr. R.P. King, formerly University of Utah is available for downloading (see below). What do you think of the content and its usefulness? There is also a MODSIM simulator link (see below).   Does anyone have any experienc...
Last replied to by BAUD
Thank you Robert for posting these materials on Modeling and Simulation of Minerals Processing. I have a special interest in this domain and appreciate the software "ModSim". It is an excellent tool f...
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Started by m_aazami
during the laboratory test for gold (specially for refractory gold ore), one of the test is GRADING ANALYSIS. 1- as in the refractory gold ore, the size of the gold grain is normally less than 10 t0 15 micron, what is the advantage of GRADING ANALYS...
Last replied to by Todd H
The grading analysis indicates in what size fraction the gold is concentrated.  This is helpful to aid in understanding the best method to treat the ore - gravity, fine grinding, refractory pretreatm...
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Started by Robert
The AusIMM is providing guidance for best practice economic evaluation and self taught materials to support this. A good deal!!  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>&gt...
Last replied to by Robert
This is guideline for technical economic evaluation from AusIMM. http://www.ausimm.com.au/content/docs/guidelines_tech_economic_evaluation2012.pdf This is well worth a read for engineers involved in...
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Started by crsp
Dear all, while researching about the bond crushing work index (Wic), I realised, that the procedure of the test is described differently in different sources. The same seems to be true for sampling. Two examples: Bergstrom 1985 _ Crushability and ...
Last replied to by Robert
You raise a great point. The Bond crushing test is the most poorly described of the methods. It is interested to hear the approach of different laboratories that still perform this test. I'm willing ...
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Started by Robert
There appears to be a lack of standardization for routine mineral processing laboratory tests at many mineral processing operations and labs. The exact situation ranges from strong, well-documented and followed – to some documented and followed –...
Last replied to by Robert
I attach the pdf document for easier use.
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Started by Dzuge
What is the permissible NTU(Turbidity) for Foundry Sand?
Last replied to by Robert
What market area are you in? Depending on the quality characteristics of nearby sand deposits and the impact of shipping cost, specifications vary within North America and globally. See the following...
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Started by GP
Hi, pls share your opinion on how to separate Zink from  blast furnace gas filtration slurry. Target to reduce Zn content from 2,2 to at leas 0,8%. Below chem composition of the slurry. SiO2 - 8,54% Al2O3 - 7% Fe2O3 -51,3% CaO - 9,45% MgO - 2...
Last replied to by RayMartin
Known method is leaching with hydrochloric acid. Typical concentration would be 5M.  Separation of leached material using a filter press. If recovery is not an issue, you can separate the dust bef...
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Started by Ashley5584
Hello, I work for a tier-1/2 metal stamping plant for the automotive industry. I have a couple of questions regarding corrosion. We are supplied M10 nuts with Nycote covered threads that are projection welded onto our stamped steel brackets. We've ...
Last replied to by Jorge
Considering the fact that you use hydrochloric acid in the Plater Process, try to review the rinse process associated to it. If the rinse process in the Plater Process is ok, you should get some infor...
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Started by P.merman
I'm a materials engineer but new to mineral processing, and was co-opted by my group to consult on a potential value-added prospect to our nascent dredging operation. I find relatively few resources specific to this type of project, that is to say, o...
Last replied to by Robert
Wow, what an open question. It's not only about elemental but also mineralogical analysis of the ore, and ensuring analysis of adequate representative samples of the deposit. Reading some materials ...
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Started by Robert
Previously I have written about competency expectations for Mineral Processing Engineers and the basis for these expectations. https://www.linkedin.com/pulse/mineral-processing-engineer-competency-expectations-robert-seitz/ The goal of this note is...
Last replied to by David
'Hi Bob About that necessary Trust: you know it is earned by the metallurgist spending significant time on the operating floor, in his met lab, and communicating findings. Not behind a computer as ...
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Started by ROCKDOC2
Hello, I just joined this group.  I'm quite familiar with standard metallurgical accounting formulas for hard rock/lode type ores.  However, I've now moved into the mineral sands and placer arena and am wondering if the formulas and considerations ...
Last replied to by ROCKDOC2
OK, perhaps a bit more information is in order.  We have good gold assays and grades info and know the recoveries etc for that metal.  The interest here is in the heavy minerals and REEs contained....
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Started by Hydromet-Paris
What flux to use to fireassay metal copper for gold analysis?? 
Last commented on by Dario L
You can look this link http://www.sciencedirect.com/science/article/pii/003991408780231X?via%3Dihub maybe it could help too
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Started by sajjadaghazadeh
Hi Can someone help me with the calculations of magnetic separator capacities? The basic rules or formulas or any relationships which may affect the capacity? I found that Q=LvrfP but I think it may not be a good prediction of magnetic capacities. ...
Last commented on by sajjadaghazadeh
Hi sir, thanks for your reply. I wonder if there is a basic formula or relationships for the capacity?!
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Started by Siddiquf
My search is for a used pyrite roaster with attached mini-sulfuric acid plant (Suppliers of used pyrite roaster/sulfuric acid plant). The eventual aim is to leach the clinker to recover gold/silver while making sulfuric acid as a bye product.  What ...
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Started by Dikil
Hiii, plan to process dolomite the output is 50mm,3mm and fines 80 mesh. need advice from this group on what kind machine and the flow make this output? i'm newbie for this dolomite industries. The capacity about 30tph-50tph.. thanks
Last replied to by JoziBoi
Hi Dikil Your run of mine (feed into the circuit), is it 100% -50mm?Also, what are the envelope sizes of the products you want? Regards Max
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Started by ovjeet
We intend to convey boiler bed ash of -6mm size through slurry pumping. Bed ash having bulk density 1160 kg/m3. Please help us guiding in selection of its operating regime, eg what would be desired slurry discharge rate, slurry concentration %, weigh...
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Started by kahonde
is it possible to use nitric and pechloric acid for soil and carbon digestion instead of using aqua regia?
Last commented on by kahonde
thank you for that,sorry i have to ask again,does pechloric acid digest gold ore at room temperature
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Started by giom
hi every one please need help on recovery of gold from ore Iam using agua regia on gold ore that Ifound as a grounded powder Its from a very old place .and Ifound refining clay and the gold ore .iam using aqua regia on it and precipate gold with smb ...
Last commented on by giom
i couldnt get it assayed yet where iam from its hard to find any lab that exactly assayed iam from morocco .but the ore i founded under a house dated before 17 centery it was hiding very carefully and...

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