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The magnetic separation of the iron is the important part being discussed here, and REQUIRES that the roasted concentrates be ground again beforehand, so that the oxides that have encapsulated the gold will be properly broken back down and the gold free to remain behind when running that magnet through the roasted cons.

Location. Texas. Oct 23, 2023. #5. There are several dozen, perhaps even a few hundred, alloys that are somewhat gold in color. There are also chemical treatments that can change the appearance of some metals and alloys, at least superficially. Tell the forum more about why you ask your question. Time for more coffee.

C-machines are best suited for the continuous production of large quantities of material. H-machines are built the same as C-machines, but use smaller media (2-3mm) and run …

I have heard XRF is more accurate on higher karats, not true if you know what you are doing and have lots of reference standards. I use XRF to buy molten stuff. 50 grams plus of sketchy stuff or mined/panned gold I melt, take a pin sample, roll it flat and XRF 3 times on 3 spots for at least 60 seconds. 99.98% i'm on the money.

The procedure I have been following from last 3 years is dip the dust in HCL and slowly add nitric acid with stirring for every 15 minutes till 4 hours. For 3-4 hours it's just stirring and adding nitric acid in small quantity and then I leave the solution for 24 hours and next day I wash, siphon, filter and finally add SMB to drop the gold.

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. ... Messages 1. Jul 13, 2012 #1 Hello, I am wondering what is the best gold refinery machine that is currently the best on the market, where it refines to 999.9 and to 24K? also is there in addition to the the ...

Set a low pressure flame. Hold the flame pointing straight down and the tip of the flame about a foot above the gold powder. Lower the flame slowly. You will find a spot when the gold slowly crusts. Lower it a bit more. At some point, you can safely melt it. This whole pre-melting thing takes about 30 seconds. A.

Pacific NW. Feb 9, 2021. #2. Panning. To test this idea put some of the sand in a glass jar 1/3 sand and fill it with water, fit the jar with a lid, shake the jar vigorously, then swirl the contents in a circular motion, as the slurry of sand and water settles.

If you are getting dust flying about your shop surely add a vacuum with a bag to collect the silver oxide powders but if it is well behaved powder mixed with split opened battery cans you have to screen out the silver oxide anyway so removing it from a filter bag may be more trouble.

Pt. and pd. are non magnetic. Take a strong magnet and place it in a baggie. Run it through the sweeps, to pick up the magnetic material. Off to the side, pull the magnet away from the baggy. continue to do this until no more iron filings are present in the sweeps.

Ok so I have went through a batch of cpu and other gold plated part is an aqua regia. After all is said and done I am left with 27 grams of what I thought was gold powder (mud) . Now I have tried to melt it and it dose not look anything like gold. It looks dark grey. Its a metal ( melted at a high temp) but I have no idea.

Something to consider with ball and hammer mills is grounding. This is probably more important with ball mills than the hammer mills but it might be worth it to just play it safe. At issue is the build-up of static electricity in a finely dispersed dust environment. This could cause a dust explosion much like they have at feed mills …

Sep 26, 2022. #3. First off - if you are processing "a good mix" (all types) of ICs you should most certainly get MUCH more the 4 grams gold from 20 kg chips. To put it in perspective - if you processed NOTHING BUT 20 kg of PROMS (the very lowest grade of chips) then yes you would only get (about) 4 grams.

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. ... He was in the business a while ago and has a decent amount of dust we are looking to refine. I have a few questions I am hoping to get answered after I had surfed this forum and realized that there are a …

Florida. Aug 11, 2007. #2. Let the powder settle for 24 hours. Siphon or drain off the bulk of the fluid thru a filter.Wash and rinse in the same vessel that you dropped it in. Transfer to filter and allow to dry when finished washing and rinsing. Steve.

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. 1; 2; Next. 1 of 2 Go to page ... I was thinking about how to accomplish the milling without letting any dust escape; the rock tumbler uses a sealed vessel.-- Thipdar . Reply. rickzeien Well-known member. …

Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. 1; 2; Next. 1 of 2 Go to page …

Hi ceewye! Like brother machiavelli stated, gold straight from ore is not pure or 24k. Depends from the area you get the ore. For example, gold from different deposits in Alaska can be up to 22k. In California's Mother Lode around 16k. Around Colorado there're tellurides deposits, gold with high content of silver.

Aug 21, 2008. #7. I honestly don't think there's an economical/safe method, for a "garage" worker, to remove PMs from whole circuit boards. 1 - Incineration is out of the question, as it releases a whole host of very nasty fumes. So unless you have an industrial incinerator/scrubber, it's not a safe option.

so from my post continuos ore roaster comes this question since a ball mill came up.heres a couple pics of a ball mill im working on.the idea is the ore and water come through the small hole visible through the pic of the big hole.rods will be inside crushing ore.im hopeing the water thats...

add water to compensate for evaporation with use keep temp between 120* -180*f home enter the store recycling program ebay-store auction software bidzip contact us - terms of sales and service gold,silver,platinum and other precious metal recovery and refining-----© 1994-2007 bodywork'z supply 7475 west stevenson lake road lake, …

If we look at this like it were material in a gold pan you would want a shearing side to side action to get the material moving back and forth while remaining fluidized or in suspension. It allows bits to slide under another or plinko. It's way between and below another. If you vibrate a gold pan full of semi round objects it won't sort it ...

Attrition Milling Machine Forum Gold Dust Refining systems 171 gold international machinery the one,initial form of the material as in old jewelry, fluvial dust, …

A proper ball mill would have a speed that brings the balls up almost to the top of the circle and falling from that height. The higher (larger diameter) it is the further the balls falls and the harder the impact on what's being crushed.

I tried precipitation of gold by using HH, Ferrous sulphate and Zinc in all three I got some sticky jelly type precipitate which would not settle nor filter using high vacuum. By using Ferrous sulphate I got grey colored. By using HH I got bark brown colored. And by using Zinc I got golden colored. So I have filtered using gravity it took …

Exeter,Devon,U.K. Jan 22, 2015. #3. Open charcoal will not retain enough heat to get to the desired temperatures. You will still need to make a furnace to trap as much energy as possible. Charcoal furnaces are a lot of work,they need constant stoking and every time you add fuel you drop the temperature. They died out for a reason,I still use ...

Today's spot 18K gold, $43.59 gram, 28 grams at spot $1,220.97 US. You claimed to have received $1350.00 for 28 grams 18k, that's a whopping $4.62 US dollars per gram an $83.16 dollar gain on 28 grams of 18k gold. For today's spot I used Dendritics Precious Metals Calculator - Link. S.

Cell phones are the worst things I have ever worked with. I hate that stuff...is very labour intensive stuff (separation of batteries, disassembly, separation of plastics-rubber-glass, separation of gold plated parts magnetic/nonmagnetic, separation of board and components, treating the board to remove solder or trimming the edges to remove …

Beginners Gold Refining Process Forum. Need help. Thread starter djmad; Start date Nov 21, 2023; Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. djmad New member. Joined Nov 21, 2023 Messages 2. Nov 21, 2023 #1 So I messed up on smelting …

Just an update on the jaw crusher so far it has worked great the only problem is the catch bin. I have bungee cords holding the drawer closed some material ends up on the concrete floor and under the machine.

First, a jeweller must ensure they have accumulated a large enough sweep to make a profit. Stuart Wibberley, sales director at Cooksongold, another refiner, says …