Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering2017-04-04T06:57:51-04:00
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Started by MSKabir
During rotation of a SAG mill, the three prominent zones are the grinding zone, tumbling or cascading zone and the cataracting zone (crushing zone). Are there any studies about the percentage of wear in the areas mentioned and what type of wear domin...
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Started by fhb58
I am trying to find out the maximum melt line height which can be safely maintained in a rectangular reverberatory furnace fired on furnace oil. The furnace in question is having 10 tons holding capacity. Is there any relationship of tis factor with ...
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250
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Started by rockape888
Hi, I am evaluating test work completed on a circuit where gravity tails are put through a float circuit. i.e. concentration of the rougher feed. Gravity circuit is likely a Knelson concentrator. Is it possible to scale up this type of circuit to 5 ...
Last replied to by Gene Cheeseman
Hi Rockape, 5Mtpa is approximately 600 tph.  The largest Falcon or Knelson concentrators top out at around 400 tph.  If more capacity is needed multiple units are used in parallel - some plants hav...
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Started by MattN
I'm researching gold tracking and tracing techniques to verify origins of gold. I'd like to find out about what the current state of the art, and future techniques that are under development. I'm most interested in understanding the precision of the ...
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187
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Started by spoch
Hi, We operate a tin mining operation in central Nigeria that is an alluvial deposit. The ore sand comes with a lot of boulders. Initially we were using a grizzly but this has led to a lot of plant idle time getting because of the time it takes to p...
Last replied to by Treve Mildren
If your process generates a lot of Slimes then look to use a Multi Gravity Separator.
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287
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Started by Mreza555
Hello everyone  there is a Leco CS230 instrument with a high sulfur detector. is it possible to have an extra low sulfur detector simultaneously ? or should we change the detector for low sulfur analysis ? Thanks
Last commented on by Mreza555
Dear Todd First, thanks a lot for minding the issue. our IR cell is a high sulfur and for the concentrations less than 0.01 %wt it has errors. my question was about the possibility of having another s...
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210
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Started by PNeil92
Hello everyone, I'm working in a multi-mineralic evaporite orebody for which a suitable CRM is not available. I have been trying to create  in house standards / MMCRMs over a few grade ranges (at cut off grade , averge of deposit and high grade) bu...
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241
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Started by Millza79
How much mass do you need for a bond rod mill test?   And can the daughter products be used in bond ball mill tests?
Last replied to by Millza79
Thankyou
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184
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Started by sajjadaghazadeh
Hello Everyone; I hope you are doing great. I really need your help and hope mine guys could help me. The fact is that we have faced a very low liberation degree in our iron processing plant. The iron concentration takes place by using primay and s...
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180
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Started by metalshaper
Hello everyone,  I know this question doesn't really fit anywhere on this site but I am in need of some help with zinc sheet metal.   I am a metalshaper and have been asked by a customer to build a gas tank out of zinc sheet.  The sheets are .04...
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192
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Started by Henryezra
Hi all, just a quick one. Say your operation had hypersaline process water with an SG of 1.1. When calibrating the Marcy scale for %solids determination, do you use fresh water with an sg close to 1, or the process water used during milling? Thanks....
Last replied to by SmartDog
Fresh water at its densest (at 4 °C or 39.2 °F) alternatively at room temperature (20 °C or 68 °F). Nonetheless, the temperature and pressure must be specified for both the sample and the referenc...
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Started by Yvette314
Good day - I want to determine the sample size needed for a run-of-mine. I want to determine the sample mass needed by particle size. I've created a tool determining the variance between the size fractions for the RoM PSD, and then based on that, and...
Last replied to by Yvette314
Thank you!
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164
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Started by Mreza555
After few sample runs, the combustion tube breaks during analysis! I've done leak check, cleaned filters and greased O-rings but it didn't help. could you please tell me possible reason(s)?
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230
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Started by fkasis
I need a method to determine the slag content of a jig product that consists of high carbon ferrochrome alloy and slag.
Last commented on by fkasis
Thank you but what Im looking for is the step by step process for the assay e.g what chemicals to use
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196
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Started by Tende
Good day,I am a PhD student, doing my research in Froth Flotation. I am currently polishing my flotation skills (batch flotation cell) for my project. One thing I am battling with is to maintain the froth height constant, especially when it comes to ...
Last replied to by Jorge
You have two options, the first one is to use an acrylic tank cell to see the slurry level and froth height. In this way to can add water to maintain an appropriate slurry level. The second option is ...
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244
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Started by mardin
Hi Dear What is the best designing for Lead processing if the feed grade is about 7 percent ( Galena) and concentrate grade is 40 percent?
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300
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Started by FarshidBsr
I am working with a project involving a bentonite powder for pelletizing plant. 0-50 mm bentonite is dried in dryer, and milled with ring roller mills to produce a bentonite powder with P80=45 um. The bentonite water absorption drops from 449% to 323...
Last replied to by Jorge
Try to get a detailed particle size distribution from the roller mill and the lab pulverizer. The production of fine particles could be different. 
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Started by kalpesh
What is process  followed for making bleaching clay from bentonite. which machines are required ?
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Started by Henley Munn
G'day does anyone have a test procedure they'd be wiling to share for intermittent bottle roll tests to model heap leach recovery performance? Thanks
Last replied to by Jorge
If you want to perform a bottle roll test using coarse particles, you can follow the standard procedure. Initially, it is common to take PLS samples the first 12 hours. after that, you can increase th...
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277
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Started by ALanyon
G'day, I've been doing some sizings from our pulverizers to attempt to find why we're getting high variation in our lab results. 2 of our pulverizers are over pulverizing creating quite hard lumps. My concern is that this may be affecting our sulp...
Last replied to by SURENDER PAL
There is production loss of Calcium molybdate in our plant .Please Help us
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201
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Started by Fatemeh
We produce steel casting liners for SAG/Ball mills. One client in Iron ore mine is using rod mill in first stage grinding. The shell liners are rolled steel and work for 7 months. Now they want to switch to cast liners and ask for a proper material i...
Last replied to by David
Well typically a SAG Mill liner is in Chrome Moly Steel (Brinell Hardness 301-402) and Rod Mill liner would be in High Chrome Iron (590-750 Brinell). https://tinyurl.com/y7wdgf3b https://tinyurl.com...
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Started by rahmatnovwizar
Hello, I need to know how to process tin ore containing stannite (Cu2FeSnS4) mineral. If you have some process flow diagram or something else will be appreciate. Thank you.
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250
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Started by christian2020
Please gentlmen,best Metal detector(s) to distinguish & remove silver scrap from poor mix silver gold ore screened ?
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308
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Started by arsi315
I have 2 different steel material and got them both tested and following are the results. However I am not sure which steel is better from both of the comparison. If anyone can help me out to identify it, I will really appreciate it.Sorry for the bad...
Last replied to by BAUD
Hi, Please, can you tell us what you want to do with these steels. The application of the material will guide you to choose which properties you should focus on. It is good to have the chemical compo...
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499
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Started by Pillai
i have done many bottle roll trials with the same feed of the CIL/CIP tanks but bottle roll trials give lesser recovery than CIL/CIP 's recovery. Anybody had the same situation? any ideas?
Last replied to by Bhaduri
Richard is correct. In general, the reverse situation is true viz. lower recovery at the plant, You might want to corroborate the following stepwise & check plant slurries for the same: a) Grind size,...
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Started by Oscar96UIS
How can I determine the acidity of an ore?. Where can I get more information about that.
Last replied to by Bhaduri
Dave is correct; however, the most accurate procedural would be to perform a Leco C & S for organic/inorganic C & elemental/sulfide/sulfate S; very simplistically, the neutralization rxn may be repres...
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Started by MAP
How we could test a bentonite ore(clay) to determine if it is good for production of acid activated bleaching earth?
Last replied to by raghdmuhi
dear Mr. Pazokian Try read the attached file for big beatification, dont hesitate for any information you want best regards
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419
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Started by markoramiusiii
Are there any settling test procedure specific for flotation concentrate pulp? I am currently testing optimal floc dosage of column flot concentrate, fed to a concentrate thickener and encountered problems such as frothy samples which makes it harder...
Last replied to by Todd H
Concentrate should settle relatively easily if you are using the right reagents.  Froth is certainly an issue with conc but it should not impact your settling tests, in terms of interface determina...
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523
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Started by adityakale
Gold loss in carbon fines is a major concern for gold mines. I am looking for percentage of carbon fines generated during regeneration of carbon in rotary kiln. Anyone data available from industry?
Last replied to by rob riggir
Hi Adityakale - you are correct in that a rotary kiln with a screw feed conveyor is not the best for minimising carbon fines generation. however, if you have one installed there's not much you can do ...
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Started by owor laban
Hello Members, Please I request for guidance through  comments  I have done some sampling in Wolfram deposit and I encountered wolfram average  grade of 0.05% and tailing grade of 0.03% Ta . Please guide me here can 0.05% W  can it  be minable...
Last commented on by owor laban
Hello Rob I used Ta symbol for stand for tailings. The wolfram in tailing was 0.03%W while average of wolfram from outcrop samples was 0.05% W is the 0.05% W grade from outcrops minable?
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Started by iron_pirate
Sample was taken from surface, curious if from this assay is this ground worth the time to stake.  
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461
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Started by owor laban
Hello Members, please i'm developing tungsten mining and processing project with an average grade of 0.28% with gravity separation, the reserves estimates proves to be big(35Mt)with artisans present in the area as well. i therefore your guidance and...
Last commented on by owor laban
Hi Trever, Mineralogy is reinite(scheelite) replaced by ferberite with low Mn0 content. It consists of sheeted zones parallel quartz veins with stringers in carbonaceous wall rock(sandstone, shal...
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420
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Started by Dadson
I have a proposed pilot project for copper processing (Azurite and Malachite). Capacity for the project is 5 tonnes per day where we want to do heap leach and tank leaching. Type of acid to be used is dilute sulfuric acid. My inquiry is whats the opt...
Last replied to by David
Dear Dadson, I will try to help for your project : - Crushing size for heap leaching feed. § 99% of the heap leaching feed should be having a size passing a screen of 1 mm. F99 is 1mm. - Extracta...
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450
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Started by jyang
I am looking for any suggestions/input on methods to more completely digest a nickel laterite sample. Currently, my lab is using an aqua regia digestion using 5 g of pulverized sample (-200 mesh) with 25 mL of aqua regia on a hotplate. We have been h...
Last replied to by Todd H
When you complete the aqua regia digestion how much solids are left from the original 5 grams?  You should be filtering the digestion prior to dilution and running on the AAS - I am sure you are. Th...
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489
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Started by bolka
hi all one of my colleagues asked a question about series some slurry pumps with various sizes like as combination of 1*6/4 AH WRT pump with 2*4/3 AH pumps in one series!! i think its very strange but is it possible combine various sizes of slurry ...
Last replied to by Mike Rockandel
When selecting pumps there always is give and take. A larger pump at low rpm or smaller pump at high rpm. A series of pumps geographically spaced could have different head requirements due to contours...

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