Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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Started by
What is the most appropriate sampling technique for mine tailings (Pb-Zn) for the characterization and recovery?
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Last replied to by Nurettin
Sonic drill is the most suitable one.  But if it’s moisture is less than 15 you need water addition for cooling after 5meter. Be careful about this water addition effects. it can be 1m3 for 10mete...
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Started by Zander Barcalow
Can somebody please help with information about UV and visible light diamond sorting.
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Last replied to by richardh
I was fortunate to spend a large amount of time in many of The DeBeers operations in the final recovery sections. Something which I enjoyed. Amongst the "visual" means of recovering diamonds there ar...
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Started by Obersturmbann
The technology continues as work in progress. It will be great to see it scale to large high grade copper ore bodies! I've seen similar results for ore types from a few ore bodies. A major difficulty is dealing with the tonnages for porphyry copper d...
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Last replied to by jculver
We have successfully commissioned and XRT ore sorter at the plant I work. The performance from the unit has exceeded all of our expectations. Application is sorting of ball mill pebbles, previously a ...
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Started by Raje Singh
What are some of the routine and regular technical/Metallurgical checks as a metallurgist you have to look at on the plant so as to optimise the recovery and throughput of the plant? And to help avoid unnecessary downtimes! Also latest technologies a...
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Last commented on by New Era
do we actually need to do carbon inventory to all adsorption tanks on hourly bases. And how could we take the samples because it gives different amount in different sides of a tank.
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Started by Bob Mathias
The process uses a lot of lime to control pH because of POX and sulfide bearing gold minerals. We have problems that the pH measurement isn´t accurate and sensors are replaced often. I think the lime is sticking on the sensor, thus, the measurement ...
Last replied to by
You can find this system in Mettler Toledo. It has an automatic wash probe system with acid solution. If you do not clean your pH probe every shift, it can be scale and not measured.
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Started by Unterstarm
Anyone knows another way to do the fire assay for the determination of Au and Ag, replacement on the use of lead oxide. Another element that can be used to prevent lead contamination!
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Last replied to by Kumar Choudhry
Agree with all the above. One more thing is to ensure that you do not use the weighing materials on any other tests to avoid contaminating the flux. And thus translating into GLP and housekeeping.
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Started by Marshal Meru
Would it be beneficial to be able to analyze the elemental grades of material in real time on the conveyor belt of an operational process?
Last replied to by Marshal Meru
We do have analysers in coal applications that are used for contracted payments (tariff terms). The issue when comparing analyser performance to lab performance in any commodity is that the sample mas...
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Started by Paul Morrow
I've been looking into several different deposits where sequential copper analysis are carried out to estimate the amount of the total copper in phases such oxides, secondary sulphides, silicates and even one case minerals soluble by water. However, ...
Last replied to by
The analyses are used like prediction with the goal measure the potential of copper recovered in the process directly without adjustment or scaling, and then in general it assumes that CuS/CuT ratio w...
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Started by
I have recently been looking at screen fire assays of core samples containing coarse gold. This seems to be a very difficult process for a project to quality control in terms of duplicates due to the in-homogeneity of the coarse fraction - finer frac...
Last replied to by Bob Mathias
The best way is to do a combination of screen metallic’s, size-by-size assays, and triplicate analyses of properly sampled coarse fractions. This is a more practical approach and can be augmented by...
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Started by Amar
Does someone help me regarding what are the QA/QC practices being followed for analysis of Coal?
Last replied to by
Unfortunately you can only access them if you purchase them or have a subscription. You can purchase individual standards or larger access. They have a good search engine that allows you to preview so...
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Started by OberstGruppen
Can somebody give me a link of standards regarding sample tools for a coal plant?
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Last replied to by Obergruppenfuhrer
I would start with ASTM D7430 and ISO 13909.
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Started by Rahil Khan
I need some advice, in a PGM plant which one of the plants feed; mill feed or the PRF grade is the more accurate grade to determine the head grade?
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Last replied to by OberstGruppen
I would suggest that the head grade to a PGM concentrator should be measured at the feed to your first stage milling depending on the configuration of the concentrator i.e. MF, MF2 etc. If you head gr...
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Started by Oberfuhrer
Am trying to automate lab scale flotation testing. I'm particularly interested in equipment that has been used to try to eliminate the possibility of human error when it comes to testing. For example, in a batch laboratory flotation test there are m...
Last replied to by
You can find an automated forced-air mechanical lab flotation machine at http://is.gd/FbKpaT. Many features are available in this unit, such as six peristaltic pumps to schedule continuous or staged r...
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Started by Marshal Meru
How many do I have to sampling for analysis assaying of metal in crushed PCB(Printed Circuit Board)? I sieved that 6-7 fraction.I'm very eager for successful sampling. Actually I got different results whenever I analyze PCB and Electronic components...
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Last replied to by Standartenfurer
Biggest issue you'll face is the potential variability of the boards. So long as it is economically viable granulate the bulk material as small as possible to reduce the potential variability. Sub sam...
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Started by
How much of an increase in plant performance would you require to justify trialling a new product? We have seen time and again that plant owners and operators are adverse to change and stick with the status quo regardless of the potential for huge ad...
Last replied to by Marshal Meru
This is a very interesting topic. It is always challenging to prove that a particular change increases recoveries by 1 or 2%. There is always a great amount of noise due to random plant variations. I ...
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Started by
Which parameter (Grade, Recovery and Reagent, Utility consumption, etc.) could be defining in concentrator plant (Flotation& Grinding) performance guarantee? How can we determine the liquid damages?While recovery is a deciding factor in performance g...
Last replied to by Sachin Prakash
In an operating plant there may be some variables both in feed ore quality and varying operating conditions in dynamic conditions. This would lead to generate different results as compared to laborato...
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Started by Amar
Does anyone can refer a supplier who can provide a lab scale mini pilot plant which can treat 8-15 kg ore per hour?We are considering a ready-made thing like that offered by Eriez flotation division.
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Last replied to by Subhash-Kumar-Roy
The desire to do more with fewer samples is always present during flow sheet development. One must be careful to properly select the tool in relation to the goal being sought.If the goal is to assess...
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Started by OberstGruppen
Does anyone know any new method to beneficiation of low-grade sedimentary phosphate? (P2O5 about 9-10%) with carbonate gangue.
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Last replied to by Unterstarm
As a general comment, one of the golden rules in flotation separations is to float the mineral in least abundance. You have the opportunity to directly float the phosphate minerals, simplify the flows...
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Started by Obergruppenfuhrer
Is Particle Size distribution important in lab testing? Is the same grind using rods, bars are different sizes? Usually at batch testing we try to match a P80, however will be the same using rods, balls, etc. How is affected the particle size distrib...
Last replied to by Zander Barcalow
Just to add to your comment, while rod mills are not often used in 3m or larger mills anymore due rods getting tangled, they are still useful in a laboratory mill in that the product being more "even"...
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Started by Standartenfurer
Does anyone have an idea on how we can recover tellurides from platinum ores
Last replied to by
Take a look at these theses:MatthysVermaak - Fundamentals of the Flotation Behaviour of Palladium Bismuth Tellurides, Ph.D. Thesis, Univ. Pretoria, 2005.ShamuduluShamaila, A Study of the Flotation Beh...
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Started by Helena Russell
I have read several texts and articles regarding bioremediation but have not run across a simple explanation of how one goes about selecting an effective yet economical carbon source for anaerobic and aerobic bioreactors. Currently I have seen the us...
Last replied to by Helena Russell
I should have been a bit more specific. I am mainly interested in liquid carbon source alternatives for bioreactors in a plant environment.
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Started by OberstGruppen
I am looking for ball clay washing process (industrial).is there any company or person support me for engineering, design and running?
Last replied to by Helena Russell
Please tell me detail size analysis and mineralogical, chemical analysis report, i will provide you detail engineering design, equipment list and other information.
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Started by
Do we have any crude way of determining the specific gravity (SG) of an iron ore?Just need a simple method of determining the specific gravity of an iron ore.
Last replied to by Gruppen
Crush the ore to less than 3 cm, weigh out approximately 1000 grams and record exact weight, add ore to a one liter graduated cylinder half filled with water, note rise in water level after the ore is...
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Started by Marshal Meru
Anyone has experience for reducing/removing As and Ni from U Uranium Ore Slurry?Our As and Ni is almost 120-150 times more than McArthur ore. The mining method is different too. They have facility for blending the ore as they have dry ore while our m...
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Last replied to by Unterstarm
There is no processing separation underground - i.e. metal extraction...so there would be enough room on the surface to install any processing solutions.
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Started by Jean Rasczak
Which reference material is important for simplifying Gold metallurgical accounting and optimization?
Last replied to by
I fully agree we often tend to use different words for the same purpose; mass balancing is very important. Often mass balancing based on different elements from the same samples might give different v...
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Started by
Which parameter (Grade, Recovery and Reagent, Utility consumption, etc.) could be defining in concentrator plant (Flotation& Grinding) performance guarantee? How can we determine the liquid damages?While recovery is a deciding factor in performance g...
Last replied to by
Yes it is true Recovery will give a good Per, Guarantee and parameter for measurement. But you forgot costing in down line operation after recovering minerals. Grade will play a major role in down lin...
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Started by Oberfuhrer
Are the barriers to best practice in mine to mill operations financial, behavioural or other? Why is best practice so hard to achieve?
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Last replied to by OberstGruppen
All of the above comments put high values on communication between the stages especially mine to mill. The grinding circuits are all about getting the best result for costs incurred. To get that best ...
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Started by Hauptsturm
"We can only manage what we measure and we can only optimize what we control," argues Michael Schaffer of Portage Technologies, and today this is possible for mineral processing circuits. The results are increased throughput and improved recovery...
Last replied to by Jean Rasczak
The use of modern, online analysers permits real time blending to achieve the desired homogeneity in plant feed.
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Started by
What could be the cause of getting different Head grades from two plants which receives the same Ore type from the same mine? The feed to the plants is only split by time or silo availability.The two plants uses FAG mills in close circuit with a clas...
Last replied to by
Of course segregation in stockpile will cause the difference. The line with coarser feed size has less head grade and vice versa. But of course it depends on mineralogy of deposit. It refers to porphy...
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Started by
Please let me know names of some good manufacturers of sliding vane pumps?
Last replied to by
May be 20 Micron filter is too small for your viscous liquid? We have delivered Viking Pump gear pumps for to pump the paints. They worked wrong after first start -with high vibration level and vacuum...
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Started by Paul Morrow
I have a 23.5" I.D. Pipe that is 60' vertical and open to a tank at the bottom. How would you keep 600 gpm of water flowing upwards in the pipe? How do you keep such a small flow from falling out the bottom? We plan on using an 8" discharge.
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Last replied to by
The situation is still not really clear.
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Started by
I have a small mining operation, Au, Ag, and lots of sulfides. I am trying to process on a small one man operation to extract the au, what could be the least cost method, and what do I need
Last replied to by Paul Morrow
We have well experienced technician they are easily to process Au,Ag from the ore.
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Started by
I have been working on Open Gear automatic lubrication systems now for almost 30 years and have conducted over 150 open gears lubricant conversions in numerous countries. However there is one design failure that is present in almost all systems that ...
Last replied to by
Do you mean the lubrication system becomes blocked when the pump is removed from the lubricant tank? Therefore contamination is entering the system, do you have a lubricant filter on the outlet of the...
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Started by Pump Guy
Hi, I am pump guy from Florida. I apply pumps in mining applications. I wanted to clarify the formula for converting dry solids to a slurry flow. In the formula ,Qm = 4  x  dry solids ( tons/hr )/Cw  =  SmWhere is 4 derived from ? and how do I so...
Last replied to by David
Have you checked out http://www.pumpfundamentals.com/ and https://groups.yahoo.com/neo/groups/pumpfundamentals/info
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Started by
"The journey is more important than the destination" Trying to build models of a process or product, forces you to ask questions about this process/product that you perhaps wouldn't have asked otherwise. Even if your model, once in place, isn't very ...
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Last replied to by
Yes, no issue with the fact that technology is changing.I am in other forums where 'Big Data' methods are discussed. Often discussions are quite heated.Society is reaching a point as predicted by Isaa...

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