Assaying, Microscopy, Mineralogy & XRF/XRD

Assaying, Microscopy, Mineralogy & XRF/XRD

  • To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Assaying, Microscopy, Mineralogy & XRF/XRD.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

2
REPLIES
95
VIEWS
Started by goonsniper
Hello, I would like to recover Lead from used fire assay cupels.  Does anyone have a procedure that I can use?  Thanks!
m
Last replied to by goonsniper
Thanks Jorge!
0
REPLIES
69
VIEWS
Started by koki
Am currently using hand held xray gun and MIDEX to determine metal content of a sample,  My question: What are elements that are likely to interfer during analysis of Au, Ag, Ru, Rh, Pd and Pt by Xray gun
2
REPLIES
470
VIEWS
Started by koki
why when I do XRF scan after Fire assay I don't get 99.99% still witnessing silver
k
Last replied to by koki
what is the acceptable Ag content in gold after fire assay
1
REPLY
157
VIEWS
Started by Druin1
Hi. I inherited a piece of metal 25 years ago and finally had it tested the other day. Is anyone able to identify what it is based on the percentages of elements it contains...quite the mystery. Thanks
Last replied to by Mike
So what are the precentages of elements?
0
REPLIES
142
VIEWS
Started by rprim93
Hey everyone, I'm possibly in the wrong space, but was looking for a forum for people that use specific lab equipment in process control for iron ore mining, so to start id like to connect with people using the Bruker s8 tiger, in hopes of discussion...
3
REPLIES
243
VIEWS
Started by renclod
Hello! This is my first posting here. Please help me understand the results of an XRF analysis done yesterday with a portable tool at the premises of a scrap metal collector. What is this specimen, what are the metal blobs made of?  
J
Last replied to by Jorge
According to the results reported by the XRF Potable Tool, the slag contents a ferro aluminum manganese alloy. Some manufactures in Asia produce alloys containing more than 55% Al, more than 5% Mn and...
1
REPLY
289
VIEWS
Started by ecublens
Hi all, How can a rough % mineral distribution be made with chemical analysis data? 
Last replied to by Mike
In general you can get an idea, say you have 50% more sulfur than arsenic, then you can propose that the base mineral was orpiment.  If you have equal amounts of sulfur and arsenic then you cam propo...
2
REPLIES
298
VIEWS
Started by ecublens
Hello all, I detected about 0.6% arsenic in the chemical analysis of a gold sample. I don't think it is arsenopyrite, realgar or orpiment as the ore is oxidized and the sulfur content is very low. What could be the source of the arsenic here and how...
m
Last replied to by ecublens
Hi Jorge, Thanks for the answer! As a result of the metallurgical tests,  we did not find any refractoriness. Very high recoveries were achieved with direct cyanide leaching, but the arsenic scares...
5
REPLIES
337
VIEWS
Started by Goldensing
Had some drilling completed and the samples  have been assessed using XRF although no AU was identified. I'd like to know if the gold could be locked up in sulphides which is common for the mine region. What elements are the best indicators to look ...
Last commented on by RI melatroctolite
Thank you.
2
REPLIES
467
VIEWS
Started by koki
Why after fire assay of shavings/drillings of gold i don't get 99.99% Au, still witnessing Ag
k
Last replied to by koki
Am using Ag as collector
5
REPLIES
480
VIEWS
Started by bezelsunl
I work for a jewelry company and want to get a full analysis of the metals we use. Them being stainless steel alloy, 10k, 14, and 18k. Gold. I was recommended to use a fire assay but after asking around I notice companies require at least 30g of samp...
D
Last replied to by DAlchemist
Conventional Fire Assay would not be the way to determine the metal content of your jewelry. The fusion of the sample ideally slags off non-precious metals, although some nickel and copper may report ...
1
REPLY
456
VIEWS
Started by koki
is it possible to collect PGM's with litharge, not flux by thermal analysis, please elaborate
J
Last replied to by Jorge
A cupel has the property of absorbing oxide of lead and other oxides, such as those of copper, bismuth, zinc, etc., which are soluble in oxide of lead; while metals which do not oxidize in the atmosph...
1
REPLY
460
VIEWS
Started by koki
Am starting a test work on fire assay, what should be the ration of flux to the sample for both high and low grade samples, may i have a reason as well please. thanking you in advance
Last replied to by Mike
see: https://www.911metallurgist.com/blog/fire-assayand: https://www.911metallurgist.com/blog/fire-assay-flux-litharge-composition  
1
REPLY
512
VIEWS
Started by koki
are there any uses of soil from the slime dams for community purpose
J
Last replied to by Jorge
That material is good for remediation when the mine has to close the operation. 
3
REPLIES
577
VIEWS
Started by koki
i received a sample of activated carbon charcoal and used XRF to determine the loaded gold then i found that it was between 68-70% Au, my question is: how do i extract gold from the activated carbon charcoal
k
Last commented on by koki
thnx Jorge
6
REPLIES
611
VIEWS
Started by koki
my question is how do i convert back the final concentration i obtained from titration to represent the whole lot, cause am only taking 100mL from roughly 150L. My final concentration from titration i calculate in "g/L
k
Last replied to by koki
thank you Jorge
4
REPLIES
556
VIEWS
Started by koki
When i do fire assay on high grade gold sample they often come out from the muffle malleable and when hammering the prills they get broken what can i do second question fire assay come low compared to hand held XRF on high grade gold samples
k
Last replied to by koki
Thank you Jorge
2
REPLIES
620
VIEWS
Started by BiancaM
I'm using a handheld XRF device for random field analysis in my magnetite plant. I take a wet magnetite sample from my feed to plant and get a Fe% of 58.72 % but when I let the same sample dry and I measure the Fe% with the same handheld XRF device,...
Last replied to by Mike
Let's take a quick look at this, R1 is reading 1, R2 is reading 2.  R1 is made up of S (sample) and W1 (water at reading 1), R2 is made up of S (sample) and W2 (water at reading 2).  If W1 > W2 t...
3
REPLIES
1197
VIEWS
Started by Azblue
Hello, everyone. I am a researcher in a small laboratory for a start up community-owned au&cu mining company. As of now, we are planning for preliminary tests of the au contents of some ores. I would like to ask from your experiences for an effective...
D
Last replied to by DAlchemist
Were you able to determine a suitable flux recipe?
0
REPLIES
639
VIEWS
Started by Shaltout
We have S6 Jaguar WD XRF from bruker with rhodium tube, We use #SmartQuant stadardless calibration coming with the device. Our goal to measure Rhodium percentage in some paint, Ink and pigment samles. I attempted to add the Rh k1 line myself to th...
2
REPLIES
1014
VIEWS
Started by Han
  First of all,for the processing of gold and tellurium ores,how exactly does the pos-roasting(calsine ores contain % 60- 62 Fe ) process work,what is the way to obtain tellurium. Second,which do you prefer for chemical analysis,aquea regea or fi...
J
Last replied to by Jorge
The presence of impurities in lead buttons usually influences adversely the accuracy of assaying. In general, the errors caused by impurities in cupellation may be either positive, due to retention of...
3
REPLIES
1740
VIEWS
Started by Zandarkoad
Hello all! Was hoping you could help me identify a block of metal. It has the markings:BMCC2 4200PN XN 950160 88.https://drive.google.com/file/d/1Y1OVFW5WhvF5VZrl4EaTNBdT-hBf-cIs/view?usp=sharingI'd like to take a sample in for assaying or chemical a...
E
Last replied to by EG Pepito
Hello Sir, Please help me identify this kind of metal with code 160 88 35 C208B PN XN 950 BMC  1330   Thank you.   Pits
1
REPLY
861
VIEWS
Started by LIMA
Hi, I’m working on a wavelength dispersive x-fluorescence analysis technique for the determination of chemical elements from unknown samples. We use Omnian from PANalytical for elemental analysis. I want to know how to ensure the validity of the ...
d
Last replied to by David
https://www.911metallurgist.com/assaying-mineralogy/panalytical-omnian-calibration-problem/
1
REPLY
917
VIEWS
Started by MRBLUEEYES2010
Couple questions :    What are the proper temps and times for curing bone ash as a bedding material.     
Last replied to by David
In the mean time, read https://www.mdpi.com/2071-1050/12/7/2988/pdf and https://www.researchgate.net/publication/305822458_The_Ash_from_Fluidized_Bed_Combustion_as_a_Donor_of_Sulfates_to_the_Portland_...
1
REPLY
1045
VIEWS
Started by rlarue
Hi, I am a geologist exploring some old alluvial workings which have a reported average Au grade of under 1g/m3.  The gold is very fine at under 500 microns and is disseminated within very coarse grained to pebbly alluvial sandstone.  My aim is to ...
J
Last replied to by Jonas
Hi rlarue, The low grade won't make XRF accurate but there is an optical analyzer that can do what you are looking for, check: https://www.911metallurgist.com/equipment/gold-detector/  
2
REPLIES
1386
VIEWS
Started by cstott
Hello, I'm new to this forum so thanks in advance for any help. We regularly send out gold solution for reclaim but I would like to find a better way of knowing what to expect from this solution and obviously AA isn't the best option for this. Everyo...
9
Last replied to by
The gold CIP process is a non-filtering cyanide carbon slurry gold extraction process that uses activated carbon to directly adsorb and recover gold from cyanide pulp. It includes the preparation of l...
1
REPLY
1073
VIEWS
Started by Devon2017
i have been mining now for a couple years in barkerville and recover a couple buckets of sulphides every season, my claim neighbor crushed some of the sulphides and got a bit of freegold when panning, he then sent the crushed tailings out for assay, ...
Last replied to by Mike
Maybe, possibly, it depends. Was the sample he sent out representative of your material?  Was his sample representative of his material?  Did the lab do a good job?  Has he sent out other samples ...
2
REPLIES
1675
VIEWS
Started by
Can anyone give me some information on how I can calculate the price per ton on gold concentrate i will attach the analysis report 
R
Last replied to by sbccbalaji
Are you a trader of gold concentrates or a refiner?  
2
REPLIES
1967
VIEWS
Started by Nipher
On a gold Mine set up, can we entirely depend or use a 56 element handheld XRF Analyser for analysis of gold in solution, gold in carbon, gold in bullion, gold in solid samples from geology? We are used to the use of the Atomic Absorption Spectromete...
S
Last replied to by SIMetallurgist
Gold in bullion, gold on carbon yes. In ore it is not as reliable I have found.
1
REPLY
1642
VIEWS
Started by Millza79
All,   Can anyone please let me know the pros or cons for the following methods on a polished thin section taken from a section of drill core:   SEM-MLA vs Optical microscopy   Thanks  
d
Last replied to by David
MLA - SEM Pro’s Identification of gangue minerals based on chemical content (XRF) and back scatter. Generally very accurate identification of sulphide minerals. Automated methods to identify s...
1
REPLY
1435
VIEWS
Started by Ahmed Zaky
i want guide to how to reach with my lab to be international certified lab in gold fire assay and what is the newest  astm method for gold fire assay in geological ores
d
Last replied to by David
Are you looking for an ISO certification? Labs like www.actlabs.com are ISO 17025 accredited and while I know a lot about the practical aspect of the operational side of it, we have a quality manager ...
1
REPLY
1531
VIEWS
Started by aufinder
I wanted to see if anyone knows this matrix and picture of the crystal specimen next to it ? Tellurides I believe but is crystal from Calaverite and is matrix of the orange red grains pebbles almost pure gold oxide111 of same ?...thanks for input on ...
T
Last replied to by Todd H
What is the magnification we are looking at?  A simple XRD scan would tell you exactly what this is. Regards  
2
REPLIES
2237
VIEWS
Started by VINCENT4442003
Which of these two testing method is more accurate, advanced and appropriate? Also, I have a spent catalyst that contains 1% platinum, can the purity increase after pre-treatment and refining? 
H
Last commented on by patel10679
Yes I will provide you, how to concentrate Platinum from catalyst waste.
2
REPLIES
1703
VIEWS
Started by Javad
I'm looking for effective methods of analysing acid grade flourspar.  Any help, ideas or putting me in the right direction to find some information about this, would be greatly appreciated.
J
Last replied to by Javad
Hi SmartDog.  Thanks for the link.  I actually had seen this before and I read it.   I'm wondering if there is anything more recent out there.  Any new technologies?  I've read about NMR and se...
3
REPLIES
1752
VIEWS
Started by CSwart
I am looking for market prices in (USD per metric tonne) for silica sands, marble, dolomite, natural gas, quartzite, kaolin, attapulgite, bentonite, and the list goes on.  I have searched on LEM, but it only specifies metals. Is there a specific we...
C
Last replied to by Craig M
Here is the location of summaries, by year for all principal mineral commodities.   https://minerals.usgs.gov/minerals/pubs/mcs/      

Please join and login to participate and leave a comment.