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 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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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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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 Philip Stewart
Why bother with a formula, which is little more than a guess, when there is now a proliferation of instruments with the capability of providing direct measurement of the association of one mineral wit...
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Started by Robert
These are books which are available free from internet. They are additional references which are valuable to have access to. I've provided only some of the addresses! There are certainly more. Which do you recommend or want to point out? Bob   A...
Last replied to by David
Great stuff Robert. A great resource is also https://www.scribd.com/search?filetype=pdf&language=1&num_pages=100%2B&page=1&content_type=documents&query=mineral%20processing Which includes titles lik...
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Started by anjanisail
What is the procedure of sampling for the development of Beneficiation Plant of Iron ore.
Last replied to by Sugar Watkins
Kim Esbensen TOS: it is not possible to ascertain the status of an individual sample (representative sample or worthless specimen) by any feature - a rep. sample is the result of a representativ...
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Started by pk_plus
When working on a test work in the laboratory on leaching, I know the concentration of cyanide to be added varies from different plant. But I would like to know the cyanide concentration range that can be used and under what basis and conditions are ...
Last replied to by max skinner
I am old fashioned, I always do this with either a bottle roll or a column leach. I put 4 or 500 grams in a bottle, with the amount of water to get you the per cent solids you want, lime, caustic or w...
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Started by Erling Young
I am evaluating a silica sand for potential as frac sand. It contains 1-3% calcite. The calcite has a crush strength much lower than the silica and is therefore not desired. The sand size range is 0.1 mm to 1.00 mm. The calcite is uniformly distribut...
Last replied to by JP Garnier
Hello, As a chemist, if at all practical, based on the low calcite % I would leach out the calcite by a dilute solution of hydrochloric acid, the advantages are that it can be made in bulk, in heap l...
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Started by Tailings
Hi I have a slurry pipe of 30 inches in diameter that cascades into a sump (vertical). The flow is very turbulent and we use a standard sample cutter to take a sample of the slurry from one side of the pipe (to measure for %solids). Attached is a ph...
Last replied to by David
restricted to meet a criteria: what/why? You need to describe the problem are trying to solve. We may be able to help you without the $1M sampler.
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Started by Joel
Hello,Sodium hydrosulfite (or sodium dithionite) is an excellent reducing agent. It acts as a hematite reductant in bleaching process of talc; the reaction is very fast at room temperature. The problem is that the talc becomes contaminated with sulf...
Last replied to by David
Bem-vindo ao fórum Joel. maybe this will help you. I am really outside my expertise here. Here is some of what I found. The theory of the action of bleaching clays in decolorizing oils is highly i...
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Started by Mulu
I have a problem of data reconciliation between process plant feed head grade and blend head grade provided by the grade control geologist. Has big difference.  
Last replied to by David
Mulu, Did you read ALL what we gave you? How does it compare to what you are doing? https://books.google.ca/books?id=hE7uBwAAQBAJ&lpg=PA263&ots=--Pe9ZtXzu&dq=Gold%20Mill%20Sampling%20and%20Metallurg...
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Started by novice0812
I have joined a new company and they have conducted a research on upgrading the Ni, Fe and Cr grades of a low grade  laterite ore through reduction roasting. Initially the samples were agglomerated with the addition of coal as reductant and the res...
Last replied to by inOr
Don't some mines produce beneficiated products called "ferronickel" and "ferrochrome"?  I believe they result from mining just the sort of ores you mention.  Mixtures of iron and chrome from chromit...
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Started by Clément
Hello, I am working in a company specialised in stainless steel process. Currently, we use nitric acid to passivate steel, but we want to change that, and use hydrogen peroxide. We work on martensitic and austenitic mainly. If someone is workin...
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Started by Dave
In Assaying for Everyone" 1910, p 27. "The crucible commercially known as Battersea "B" or 20 gram size will be found convenient for use when 1 assay Ton of ore is taken; size "F" or 30 gram when 2 Assay Tons are used, together with the necessary am...
Last replied to by Dave
Thank you!   Dave
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Started by dr47
How much the best moisture content in the crushed ore (gold) for agglomeration?
Last replied to by dr47
Thank you, David & Khosana. Maybe yes, it depend on the content of fine or clay material. Need further investigation on our ore.

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