Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning

Pyrometallurgy: Roasting, Smelting, Refining & Electrowinning2017-04-21T02:33:06-04:00
  • To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Pyrometallurgy and Electrometallurgy.
  • 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
200
VIEWS
Started by Scotman
I have a slag dump that contains various grades of Zn, Pb as well as Ga and Ge. Is there a technology or process available that can economically extract these metals?  Thank you 
Last commented on by Scotman
Hi Todd I have a complete CPR on the slag pile - it has been grid - drilled and assayed and which shows good grades of the above metals. What I am now looking for is a company that has experience i...
2
REPLIES
133
VIEWS
Started by lerpollock
I work with non precious metals such as aluminum, brass, and steel for my jewelry. I have recently been working with an aluminum bronze alloy called C954. After doing some research online, I came across some information that said aluminum bronze has ...
Last replied to by lerpollock
Thank you. I should be able to find what I'm looking for and get some answers too. Very helpful. Much appreciated.
0
REPLIES
294
VIEWS
Started by metallurgyquest
The 6 metals in equal amounts. Through the melting method in a foundry. Not the powder method. Or will this end up not mixing and having cracks due to not adhering to the Hume-Rothery rules? And if not an alloy then what will happen once all 6 are ...
0
REPLIES
2
VIEWS
Started by Seeker
How to recover lead and tin separately from the solution containing chlorides of lead and tin through electrodeposition? Thanks!  
0
REPLIES
120
VIEWS
Started by aeolson
Having some issues with all of a sudden brittle dore bars from our ILR.    The bars used to run about 95% combined Au/g.   However this has dropped to to around 80% with the new actor being pb. Cu is about 4 ppm On a typical batch we use 6 to 7 ...
0
REPLIES
157
VIEWS
Started by Teggry
Hi, Can anyone tell me why Magnsesium dioxide would be used in a flux mix for smelting gold?
4
REPLIES
564
VIEWS
Started by Mineshaft
I am going to be conducting a test plot regarding phyromining this summer, and was curious if anyone knows what I should use as a lixiviant to make the gold water soluble in the ground for optimum plant uptake? I would love to stay clear of cyanide ...
Last replied to by SmartDog
As in any metallurgical process the issue is the rate at which the process works.  If a gold lixiviant is used (similar to the ones that Todd mentioned), the rate of metals uptake by the plant versus...
0
REPLIES
284
VIEWS
Started by Tawaz
I am not a metallurgist, but a miner owning a small claim with high grade copper ores, 20%-40% with an average 35% iron content. I don't have the capital to buy expensive smelting equipment and would like to start by doing small 100kg batches in a  ...
1
REPLY
159
VIEWS
Started by pelo
currently i am experiencing low gold purity and high silver in my bullion an my flux ratio is borax 60%,niter 20%, silica 10% and soda ash 10% please help out
Last replied to by Deano
I assume that you have previously had higher gold purity in your bars. What I need to know is the previous purity and what gold and silver levels are you now getting. Also I need to know what metals...
1
REPLY
190
VIEWS
Started by LANGY
am looking the best and effective continuous method  for drying fine magnetite concentrate from a plant that produces 6000tpm. the magnetite is being produced as a by-product from flotation of phosphate. the problem is that its taking long to dry a...
Last replied to by SmartDog
The two simplest methods would be either a rotary dryer (kiln) or a torus disk dryer.  The rotary dryer is the simplest to operate, but may require air emissions permitting.  The torus disk units re...
1
REPLY
154
VIEWS
Started by Wulvzy
Not a metallurgist, just a blacksmith who is somewhat familiar with steel from reading. so bear with me here because i have to explain in simpleton terms. Attemping to bypass conventional steel bloomery and smelting by loading pure ingrediants -325 ...
Last replied to by Wulvzy
Should add: current estimate ratio is 30% charocoal powder 30% ironpowder, 30% 1084powder, 5% borax mixed evenly with other ingrediants, remaining 5% glass placed at top of canister pre sealing.
5
REPLIES
552
VIEWS
Started by Moonglow
I'm trying to figure out which has greater yield of gold in general.
Last replied to by Moonglow
But good answer SmartDog, I just really wanted to know the math!
1
REPLY
173
VIEWS
Started by Moonglow
I'm looking for a credible supplier that has good quality, preferably old CPU's, and has solid reputation.
Last replied to by SmartDog
Kind of depends where you are looking for them.  First thought would be to go to a local services directory and look up e-waste collectors and processors.
0
REPLIES
144
VIEWS
Started by wageeh
hello all, how are you, if i have zirconia ( ZrO2 ) and yttria ( Y2O3 )  powders, what is the best cheapest method to produce yttria stabilized zirconia? 
1
REPLY
160
VIEWS
Started by Danihani
Which water is good for making your AAS standard, OR or UP water?
Last replied to by StefanJov
Water with conductivity below 1 us/cm or better is fine.  Laboratory water affects the sensitivity and detection limits of the flame technique for some elements. 
1
REPLY
173
VIEWS
Started by Millza79
In bench tests for testing the amenability of a pyrite roaster, is the air continually added throughout the test, or is it just added at the start?
Last replied to by Todd H
Air is supplied throughout the whole test.  The idea is to oxidize all the sulfide so the reaction requires an excess of air to make sure there is no oxygen limitations.
2
REPLIES
407
VIEWS
Started by BUBKWEY
I have some tons of old Carbon that I keep in my store room after Elution.  Their grade isn't economical enough to take them all for other Elution processes.  May I please know the details of controlled burning, which kind of heat source is the b...
Last commented on by BUBKWEY
Thanks Jorge.. The info in the link was a great mind opener to me..
0
REPLIES
213
VIEWS
Started by mikewj
Anyone have a rule of thumb on how often the activated carbon inventory should be turned over through elution/regen in a gold CIL/P plant? I've heard 7 days. 
2
REPLIES
179
VIEWS
Started by johnywhy
This question concerns the making of alloys for casting. I need a low-toxicity, low-melting point metal, to cast hardware parts. The parts must not crack under torque or impact, and should remain hard up to 100 deg C. My plan is to make a Tin/Bism...
Last replied to by johnywhy
I'm not committed to tin, bismuth, or silver. But need to keep things relatively low-toxic and low-temp. (home, indoor fab). Need to minimize shrinkage/expansion of cast part. 
1
REPLY
367
VIEWS
Started by oro
I’m wondering if I’m in the ballpark with this and how scaleable it might be. 2.5 L of solution1% cyanide1% sodium hydroxide2% alcohol - 700g of activated carbon w/ aprox 2-3 g of gold- carbon is wrapped in mosquito netting- anode is a carbon /...
Last replied to by oro
Next day update...unfortunately the whole thing evaporated overnight! ...but seems like it worked, nice gold wool. I assume a single vessel to heat and electrowin can only be done using non conductive...
1
REPLY
326
VIEWS
Started by Rashid
Hello Guys, How can I increase Gold Purity during smelting by using ratio of fluxes, Currently I'm experiencing high silver in dore with low Gold purity. Fluxes Ratio used; Borax - 38% Silica - 10% Soda - 3% Nitre - 6% 
Last replied to by rushcard1
Rashid:  I don't believe you are going to achieve what you want by adjusting the fluxes, although I am not an expert on them.  I do know you can spin your wheels with numerous experiments that deal ...
3
REPLIES
378
VIEWS
Started by Eagle788
Hello guys, I have absolutely no knowledge of the fascinating science of metallurgy. I do however am a student in history. Im more particularily trying to establish the authenticity of an ancient story in which there is mention of a large wall made ...
Last replied to by BATALEUR
This seems very crude of course but I don't see too many metallurgical issues with it although the strength of the wall and it's stability might be an issue. Assuming they were making cast iron it wou...
5
REPLIES
288
VIEWS
Started by MrTMBjewelry
Hello, My wife and I have been in the jewelry industry for several years, from manufacturing, personalizing, packaging, website, branding, and marketing of our own company and line of jewelry. The ups and downs of our retail business have led me to...
Last replied to by Dave Tahija
Manhattan Gold & Silver Buys a lot of jewelers sweeps and scrap: https://www.mgsrefining.com/gold-refining-process/    
2
REPLIES
261
VIEWS
Started by vaheedghassemy
Hello all I want to add guar to electrolyte of copper and sulfuric acide then start to electrowinning but i dont knew how much add guar to electrolyte please help me. thanks
Last replied to by rbtmiller0@gmail.com
Below link takes you to an article that indicates 240 g/t of cathode. It is a place to start. https://books.google.cl/books?id=qp0hWKleKwcC&pg=PA182&lpg=PA182&dq=goma+guar+electrowinning&source=bl&o...
1
REPLY
273
VIEWS
Started by vaheedghassemy
hello friends  I want to measure the concentration of copper in the electrolyte and PLS but i dont know how i can do that .please help me  thanks a lot
Last replied to by SmartDog
Your question can be answered several ways, depending on what you are actually looking for.  The basic topic is covered by metallurgical accounting, where generally recognized formula are used to mea...
3
REPLIES
365
VIEWS
Started by ToddLaw
I've got a mine with sulfides in my ore. For reasons unrelated I haven't been running my ore for 22 years. I used to burn my ore with a Beckett oil burner in a contained environment and extract the output with water. The sulfides would ignite in the ...
Last replied to by Siddiquf
ToddLaw, if your sulphide ore has been exposed to elements for 22 years, the sulphides may have been oxidized, at least on surface of each grain, and therefore may not be combustible any more irrespec...
3
REPLIES
295
VIEWS
Started by DieselDave
I'm a micro miner and have zinc / silver ore, also has gold in arsenopyrite. I'm wondering how to micro scale extract the silver without froth flotation, arsenic?
Last replied to by Jose Doneiber
Hello my dear friend. In Colombia there are argentiferous minerals and I have observed that the most indicated method is to first float the ore then leach it with cyanide, you can do it on a small sc...
1
REPLY
267
VIEWS
Started by sajjadaghazadeh
can someone help me with chunks problems in iron ore pellets in rotary kilns? thanks so much.
Last replied to by RayMartin
What do you require to know?  Why they form? How to remove? I would need some ifnrmation about your process or plant.  
1
REPLY
275
VIEWS
Started by Cl.BrINHOF
While electrorefining in a CuSO4 electrolyte (Cu anode to SS blank) what are the roles of additives (thiourea, glue, salt) in relation to bubble formation? More specifically, is there any evidence to support the claim that the potential to create mor...
Last commented on by Cl.BrINHOF
Thank you. I appreciate your response.
4
REPLIES
418
VIEWS
Started by WildWestMining
Hello, I am an artisnal miner in northern Arizona and am having trouble fluxing a sulfide ore. The ore is composed mainly of arsenopyrite, pyrite, galena, and polybasite. There is minor barite present as well. The ore was crushed to 150 micron and ca...
Last replied to by WildWestMining
My base recipe was: 40% fused borax, 25% potassium nitrate, 20% soda ash, 15% silica.  I chose this as a starting point because it has been successful with other local sulfide ore that I've smelted...
2
REPLIES
324
VIEWS
Started by leonard
  how do you seperate fine gold loaded activated carbon from pulp?    
Last replied to by rob riggir
Try coal flotation techniques as filtration will not work as both the pulp and carbon particle sizes will likely be similar. Cheers
3
REPLIES
434
VIEWS
Started by jovanifirebird
hello metallurgists. we have had an issue of importing HCL to our gold processing plant. delivery date is getting delayed. however, we do have stocks of 55% H2O2 in our site. do you think it is possible to replace HCl with 55% H2O2 for carbon washing...
Last commented on by Teggry
Good answer Mark
2
REPLIES
339
VIEWS
Started by FranLaraMonge
I am Francisco Lara Monge, peruvian chemical engineer working in a flotation plant in Ecuador. Few days ago, for second time, we have a bigbag, with low grade concéntrate, which have violent reaction producing SO2, high temperature 250°C, and with ...
Last replied to by Richard S
My first best guess is that you have pyrrhotite in your concentrate.  It is known for spontaneously combusting at ambient temperatures particularly if there is moisture present in the concentrate.  ...
3
REPLIES
742
VIEWS
Started by zwivhuya
i would like assist on how i can remove silver metal from an ionic insoluble silver chloride.
Last replied to by inOr
Cyanide leaching extracts silver from sulfide ores.  I don't know how well it works on silver chloride, though. If it works, then there are several methods for recovering metallic silver from the cy...
4
REPLIES
408
VIEWS
Started by oro
For batch leach samples - instead of stripping the AC I was wondering if it can be smelted, maybe with a bit of litharge as a collector and some borax to slag off contaminants.  I understand the carbon can be “ashed” in an electric muffle furnac...
Last replied to by oro
Rob, So...ash / smelt in the same vessel and furnace, an elegant solution.  thank you!            

Please join and login to participate and leave a comment.

BUY Laboratory & Small Plant Process Equipment

We have all the laboratory and plant equipment you need to test or build/operate your plant.

ENTER our Mining Equipment' Store

We Sell EQUIPMENT for all types of Mineral Treatment PROCESSES and Laboratory Testing needs

Do you need METALLURGICAL TESTING of your ORE?

View the Services we Provide

911Metallurgist Mineral Processing & Process Development Laboratory

We have a metallurgical test for every possible mineral type and treatment.

Need ENGINEERING Services or Plant TROUBLESHOOTING?

We can IMPROVE ALL PLANTS / Mineral Processing Engineering & LABORATORY Ore Testing

911Metallurgy Engineering

Contact us for process engineering, metallurgical investigations, plant optimization, plant troubleshooting, needs. WE “FIX” METALLURGY.

I Need Consulting Engineering Help
I Need Ore Laboratory Testing