I have 2 questions I need some advice on. First of all thanks to those who gave good advice on my previous ?'s, was very helpful. 1st question is after recovering the foils I have A little bit of copper particles than made in with the gold foils from e-scrap along with the green plastic, which...

Ohio, USA. Dec 13, 2015. #4. powermetalx said: It seems there is some disagreement over the use of HCl H2O2 vs HCl alone. There are many ways to skin the . HCl peroxide is a great "set and forget" method, as it doesn't require much attention, but it's slow. Heating HCl requires a bit more attention, but it's faster.

Thanks for the info Steve. Interesting to note that SMB neutralizes the peroxide. I dissolved a little copper with Hcl and found gold dust left. I had been using this HCL/Peroxide solution for about 3 weeks to do cpus and fingers. I was filtering the mix and regenerating it with extra peroxide and a fish tank bubbler.

Place the crucible on a fireproof surface. 3. Aim an acetylene torch at the gold. Aim the flame at the gold until the gold is completely melted. 4. Pick up the crucible using crucible tongs. 5. Separate the gold into small pieces and allow them to harden.

1. Introduction. Gold has attracted people since the beginning of the civilization. The earliest mining and metallurgical operations of which traces remain were those carried on in Egypt in dealing with the ores of gold [1].The mixture of concentrated HNO 3 with HCl, aqua regia [2], is a well-known medium of dissolving gold and other …

Gold Ore Refining Hcl And Peroxide T10:05:43+00:00 Hcl/ peroxide question Gold Refining Forum With even stronger hydrogen peroxide we can end up changing all of the fine gold foils to dissolved gold plating back onto the copper yet undissolved, with these stronger oxidizers in solution less heat is needed to oxidize the chlorides to ...

*Cupellation is a refining process in metallurgy, where ores or alloyed metals are treated under high temperatures and controlled operations to separate noble metals, like gold and silver, from base metals like lead, copper, zinc, arsenic, antimony or bismuth, present in the ore. ... Muriatic Acid 34% HCL ~ Baume. 3. Hydrogen Peroxide - 3% but ...

Just trying to save the cost of the peroxide in case my result is negative. So I simply put a pinch of the concentrate in a small amount of hcl and it turned a banana like yellow before even adding any bleach. It did turn a deeper gold tinged yellow once the bleach was added though. (I'm still waiting on my stannous chloride, doing the solder ...

Gold Refining Processes. Chemical Processes & Chemical Discussion . HCL/peroxide hcl/Clorox - paper filter. Thread starter crudpuppy; Start date Sep 5, 2010; Help Support Gold Refining Forum: ... going to reclean with hcl/peroxide but doesnt really get ride of paper content in it. If hcl/clorox will only eat metals then I could prolly due that ...

I placed 36 Pentium Pro chips in the acid, (mixed 2 parts HCL & 1 part Peroxide) For 36 hours. The CPUs were whole and unaltered in any way. I now have 36 ceramic chips (with most, but not all of the pins missing, most of the gold plates are exposed, and most of the gold flake from the face plates has flaked off), a set of 3 coffee …

This morning it looked very clear. not colorless but clear. This was dark green yesterday when I dumped in the CPU's and processors. I didn't stick around to watch so it could have been a quick reaction. I washed the computer stuff just now (in water from my well) and left it in a container with...

Sep 12, 2021. #1. I happened across a Sreetips video today where he was re refining some gold powder (4th time I believe) with Hot HCL and peroxide. Seemed …

84. Location. Titusville, Pa. Apr 25, 2007. #1. I mixed a batch of Peroxide-HCL acid according to instructions given by Lazersteve elsewhere on this forum. I placed 36 PP chips in the jar. After 2 days the acid is a medium green color and there is no indication of the pins and plates detaching from the ceramic.

It has been found that 0.02–0.2 mol dm −3 H 2 O 2 solutions with 0.2–2.0 mol dm −3 HBr have provided effective media for dissolution of pure gold-wire (99.95%, 0.25 …

Laziness can sometimes be a blessing too.. I wanted to clean this crucible with the dilute sulfuric solution as suggested by @BlackLabel, but instead of hopping to the market to fetch some sulfuric, I tried this little cleaning experiment with a 50Ml 5M citric acid (aq) solution.It worked great. I dipped theb crucible in a 100 ml beaker and poured the …

Do some research in the cupric chloride leaching or etching process, often wrongly called the AP or acid peroxide process on the forum, where we form cupric chloride CuCl2 (using HCl and 3% H2O2 or air bubbled into the acidic solution) to dissolve copper and base metals into solutions normally leaving gold (the process is not fast but …

Mar 20, 2013. #3. Hcl+bleach only works for mostly gold material. Any dissolved gold would cement right back onto the copper core of the pins (they turn black).It is important to understand this fundamental mechanism when dissolving and precipitating metals as well as the reactivity chart and it´s meaning.

The ratio I start with is 2 HCl:1 Peroxide. I use the 3% peroxide. The higher concentration stuff will work faster. I've found that if I keep the color a clear to dark emerald green it tends to react quicker. Here's how my stock vessel looks right now: Here's the strainer I made to keep the scrap (fingers usually) separated from the gold foil ...

Laboratory studies on cyanide leaching of gold have shown that the maximum recovery of gold is 52.92% at a concentration of hydrogen peroxide of 0.5%, the recovery of gold without ore treatment is ...

Okay, gents and ladies: What is the process for cleaning leached ore and raw ore with HCL for a better ppt route ? And which would be better - before... Forums. New posts Search forums. What's new. New posts Latest activity. Members. ... Gold Refining Processes. Beginners Gold Refining Process Forum ...

Stannous chloride is able to detect gold in very, very, small concentrations. If you want to experiment, take a few drops of your gold solution and dilute it in HCl again, maybe 10x, and test it with stannous. If you keep doing this, you will get a feel for just how miniscule amount of gold can be detected.

shown that hydrogen peroxide can be used as a source of oxygen in the leaching of gold ores. To avoid side reactions, the following conditions must be applied: Hydrogen …

I took a friends advice and tried 2 parts Muratic acid and 1 part Hydrogen Peroxide to extract gold from pc boards and cell phones. He has since went missing and I dont know what the remainder of this process is. I'm a single father so a cheap process is what I need. Currently I have cleaned and soaked alot of pieces.

The lower concentration of peroxide will have a much harder time dissolving any gold so that shouldn't be a problem until you pass the 2:1 ratio with peroxide additions (Acid eroxide). If you keep the temperature at room temperature (25 C )you shouldn't have any gold absorbed. Any absorbed gold will readily percipitate using SMB.

Gold Refining & Metal Refining Classifieds. Vendors - Refiners, Buyers, Assayers ... . Platinum, palladium and gold leaching from magnetite ore, with concentrated chloride solutions and ozone. Thread starter Nuwaysolutions; Start date Nov 30, 2017; Help Support Gold Refining Forum: ... Sounds a lot like hydrochloric …

A Basic ore flux 15g sample 30g Na2CO3 35g PbO litharge 4g silica or crushed glass (vary depending on silica content of ore) 35g Na2B4O7 1g CaF2 (vary depending on aluminum content of ore) 3.2 g flour Flux Quartz Ore 15g sample 29g Na2CO3 40g PbO No silica needed 3g Na2B4O7 no CaF2 3g flour There are many …

But if heated strongly even the excess oxygen from air, can oxidize the chloride to form chlorine in solution which can dissolve gold, with air probably not that much gold would be dissolved that we may notice, but as we had stronger oxidizers like …

Abstract. In this study, the effects of thiourea (CH 4 N 2 S) on the efficiency of gold dissolution were investigated for the extraction of gold from an oxide gold ore of the eastern Anatolia region, Turkey. In the thiourea leaching experiments; several parameters such as particle size (–75, –53, and –38 μm), leaching time (30, 60, 120, 180, and 240 …

Dec 25, 2007. #7. Hild2000: Hi; One or more of those other chemicals in the 9% peroxide are classed as stabilizers, to keep it from decomposing. You will find small amounts in all bottled peroxide to keep the bottle from bursting. On long term storage of my 30% peroxide, I have drilled a small hole in the top of the bottle caps.

I mixed the HCl to hydrogen peroxide using a 2:1 ratio (HCl to H2O2 respectively) as suggested elsewhere on the forum. I used a solution consisting of approx. 8 oz of Hcl to 4oz of H2O2. I placed some 20-30 pins in the solution. The mixture seemed to be doing something within five minutes and the solution had turned a yellowish-green color.