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 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 Ganoza
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 Dick
My interest is in particulate sampling of ores in the minerals industry. The formula for the Fundamental Sampling Error devised by Pierre Gy in the 1950's includes a term we refer to as the Liberation Factor (l), a dimensionless number that varies be...
Last replied to by Marcia
I may be mistaken, but today we use in practice tools like QScan or MLA that provide this information coupled with chemical / mineralogical compositions.We have used these tools a lot. However, attent...
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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 Robert
I am working on developing paths for professional development of mineral processing engineers. A summary of competency expectations for mineral processing engineers working in operations has been posted at: https://www.linkedin.com/pulse/mineral-pr...
Last replied to by Robert
David There have been a few private and public comments with the original posting. I have added the note below: There is much material available for personal use in developing as a mineral processin...
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Started by Lonetown
A piece of presumed slag was turned in to the local historian by a citizen who was foraging in the site of an old bloomer forge.  The forge existed from 1760 to 1805 at the particular site.  I would like to identify if it is slag and if so what els...
Last replied to by Lonetown
I was able to find a lab that could do XRF but it was metals only.  They could not comment on P, S, or Ca which I would have also liked. The results for Testing Method: Percentage of Compostion (All...
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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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Started by Mukesh goyal
I wants to increase the bulk density & glaze of 300-500 Mesh mineral powder and clay. I need any chemical formula or method to increase  it. Thank you!
Last replied to by KPvanderWielen
Hello Mukesh, To help you with this it'd be handy to have a bit more info on the mineralogy of your products and what process you are using.
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Started by ASHUTOSH SHANDILYA
Hello , Seeking solution for removal of micron size free iron particles from micronized limestone & china clay powder through dry processing. Micronized limestone and china clay powder is having 0.2 to 0.5 % free Iron and requirement is =< 0.05 %...
Last commented on by ASHUTOSH SHANDILYA
micronized calcined china clay is having 0.5 % of free iron which use to come due to abrasion inside the MS pipe lines , ducts , cooler etc .
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Started by ASHUTOSH SHANDILYA
How can we separate siliceous content from CaCO3 ? Input limestone is having 8-12 % SiO2 . Main objective is to reduce SiO2 < 2% through dry beneficiation methods . By Froth flotation process it is easy to achieve this target in multiple flotati...
Last commented on by ASHUTOSH SHANDILYA
Thank Robert , No liberation study not be done . I will do that & will check the silica content in both fractions .
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351
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Started by anjanisail
In any magnetic separator there is some gap maintained in between two matrix plates likewise 1 to 1.5 mm. Feed in the form of slurry is introduced on the matrix plates. Feed slurry comprises of range of particles ( 45 micron to 150 micron). My questi...
Last replied to by shekara802@gmail.com
Please, explain the details on beneficiation of manganese by Magnetic Separator
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Started by GhanaBob
Because of the clay we are experiencing when washing our alluvial gravel, I  have been advised to perform a wet sieve analysis to record the classification of soils . A significant percentage of particle less than 75 microns will determine the prese...
Last replied to by BAUD
The material given by David is very rich and helpful.Clay is a family of minerals whose grain size is comprised between 1 and 4 microns. In some applications, this word clay has a wide meaning and ...
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Started by HugoMet
When we perform Cu flotation tests, we analyze several responses and have drawbacks. I have devised a form, for example in the attached figure it is a test to depress pyrite, a single value is obtained with 3 elements to be analyzed in this case "The...
Last replied to by David
An example set of conditions:
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Started by Aliarsen
I'd like to know which way will be ok to extract metals from steel slags Leaching or flotation or xYz? Which one is more suitable whereas some elements like Si and Al extract lower Here is the composition of steel slag: SiO2 18%-Al2O3 4%- CaO 32...
Last replied to by AJNeale
Hi Aliarsen - as you can see from the comments above, the group has provided you with a lot of yellow warning lights on spending a lot of time or money evaluating options to recover value out of steel...
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Started by Samuel Trindade
Hello! I work in a gold company and the problem we're facing during the routine samploing for control is that the solution keep reacting after the sampling till get filtered in the lab. So, depending on how long my sample stay on the bottle from sa...
Last commented on by Samuel Trindade
Good!!! It's exactly 500 ml... we collect these samples from 6 tanks.. that's seems a good solution.. thanks very much!
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Started by kahonde
*i have stannous chloride dihydrate and i want to use it to test for gold level in pregnant solution.The problem is i do not know which concetrations to dilute to.Thanx for your help*
Last replied to by .999
Are you talking about a solution of CN or a chloride solution?
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Started by ASHUTOSH SHANDILYA
How can we improve the Brightness of Bentonite clay, if the input bentonite brightness is in the range of 45-50 only? Seeking dry beneficiation process if possible. Final product brightness range in between 60-65 .
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Started by gipo
I have some quartz with specks of red and yellow color. I would like to test whether these specks are gold. Can you tell me how to do this test in the simplest way. Many thanks,
Last replied to by max skinner
If you don't want to destroy the sample, fire assay would be the best, have a competent mineralogist look at it. He may be able to tell by looking.
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Started by Sandy
Hello everyone, I'm new in using XRF instrument and I need to invistigate any lead contamination in powdered samples  that should not exceed 10ppm of lead . However,  I need to makeup some sort of compostion as solid phase standard contains righ...
Last commented on by Paul Diemer
Another way is to acquire about 15 to 20 samples of the material you are working with. Make sure they contain a, fairly wide, range of Pb content by assay, either AA or chemical procedures. Then prepa...
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Started by yes
I am trying to calculate the mass balance in a fibre panels manufacturing plant. does anyone have an idea on where to start? or a walk though solution. because i'm lost here.
Last replied to by Sugar Watkins
Yes, you are lost and your question gives no details at all. Elaborate please?
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Started by ianvallecera
Hi I'm having a hard time on how to read/identify the mineral of spectra or peaks that the XRD gives us. I mean I don't know to identify. Please give me a light. Thank you
Last replied to by Mathias
First off, those are not spectra. Better call them XRD traces or patterns that have peaks. Then, it would be helpful to know what material you are examining. Without that I will be making wild guesse...

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