Fume Hood | Gold Refining & Metal Extraction Forum
Gold Refining Basics. Safety . Fume Hood. Thread starter Jmk88; Start date Feb 9 ... I doubt a "dry" scrubber will do the job. The fumes are wet vapors and need to condense back to a liquid to remove the NOX. Reply. notehunter494 Active member. Joined Dec 26, 2020 Messages 35. Oct 22, 2021 #3
Depopulating Fumes | Gold Refining & Metal Extraction …
Gold Refining Basics. Equipment / Systems / Tools . Depopulating Fumes ... Yes, but as mentioned at the start, everything I've seen is for acid fumes/refining/NOx/SO2, which typically involves bubbling the emissions into NaOH solutions, also H2O2, activated charcoal, etc. ... Wet scrubber would require a blower to …
Balestri Technologies
The rotating device is useful in the aqua regia refining process in presence of silver higher than 10%, reducing the chance of un-dissolved material and increasing the efficiency of the process. MAIN FEATURES: For the refining of alloy having a content of Au minimum 65% and maximum 15%. Minimum purity: 999,5/1.000. Input material: metal granules.
Shor fume scrubber | Gold Refining & Metal Extraction Forum
Gold Refining Processes. Electrochemistry . Shor fume scrubber. Thread starter 924T; Start date Aug 26, 2013; Help Support Gold Refining Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. ... Even large professionally built scrubbers only remove around 80% of the fumes when …
Mini Scrubber | Gold Refining & Metal Extraction Forum
Fumes generated by the reaction are collected thru glass spiral refrigerator ( water-cooled ) and washed into the six sequential Scrubbers ( Scrubber 1 to Scrubber 6 ) for neutralization. 5. When needed during the refining process and at the end of the reaction, Glass Reactor is strongly air-cooled by three Fans : at process end, water is ...
how to build an acid resistant hood & scrubber | Gold Refining …
The fumes which enter pipe 1 pass through the scrubber, the fumes that pass up pipe 2 bypass the scrubber. One blower supplies the suction for both pipes. The fumes going out pipe 2 are not the noxious fumes, they are diluted by the total volume of air passing through the hood.
Building my first fume hood and scrubber | Gold Refining …
You could also use plain cold water with or without balls. If you use distilled water as cold as you can get it the NOX will condense and make the water a dilute nitric acid. Just depends on the volume of fume exhaust you are going to "scrub". And how efficient you want the scrubbing to be.
Scrubbing | Gold Refining & Metal Extraction Forum
This required a scrubber, but it was much smaller - about 5' x 15'. The blower was 250 cfm. (3) No air dilution. Most all self-contained, do-it-in-your-livingroom, karat gold machines on the market use this approach. Everything is sealed up, as much as possible. The only thing going through the scrubber is pure fumes.
Will this Hood and Bucket Scrubber work? | Gold Refining …
Also, from the figures I've always worked with, the nitric fumes must spend at least 9 sec in the caustic scrubber to get scrubbed - that's considering a packed column with a spray system at the top. Therefore, at an exhaust rate of 300 cfm, the scrubber volume would have to be at least 300 x 9/60 = 45 cu.ft (340 gallons).
Scrubber for Aqua Regia | Shor International
Charged with treated activated charcoal (available separately). This fumes scrubber will scrub aqua regia fumes from up to 2 liters of aqua regia per run. A charge of treated activated charcoal typically will last for 5-7 refinings. If refining 5 liter aqua regia baths, two scrubbers, hooked in parallel, should be employed.
Neutralizer-Scrubber of acidic fumes & gases | Page 3 | Gold Refining
Gold Refining & Metal Refining Classifieds. Vendors - Refiners, Buyers, Assayers ... In both cases, let's assume the fumes are put through your scrubber. (case 1) You have a sphere (minimum surface area) of copper that weighs 1 pound. You place it in 1/2 gallon of water and add a small amount of nitric. When the reaction subsides and the ...
Fume scrubbing system at Gold Refinery | Gold Refining
Typically sodium hydroxide is used in a fume scrubber for aqua regia work. By maintaining the pH at 9.5 to 10 the nitrosyl chloride (the yellow gas component of a NOx cloud) will break down into water, salt, and sodium nitrate in the scrubber. For most applications caustic scrubbing is all that is needed.
New fume scrubber design | Page 4
It is used when you have a blower that is not corrosion resistant and you blow clean air up a pipe causing the air in the hood to follow it. The reason you use a venturi powered scrubber is to scrub a small quantity of fume being sucked from an enclosed reaction. A flow of 10 CFM is good for that type application.
AR2G Gold & Platinum Refining System | Shor International
One of the safest and most advanced aqua regia gold refining systems available, this system is a mini-version of the AR3G Refining System(without the magnetic stirrer). ... The AR2G system employs an integrated, powerful scrubber that removes all fumes that are emitted in the system as your metal dissolves. Completely self-contained.
New fume scrubber design | Gold Refining & Metal …
By pumping that air into an air tight scrubbing chamber the fume has no place to go but along the airpath and through the scrubber. Plus with a 10 CFM eductor, the time the fumes remains exposed to your scrubber chemistry is exceptionally long for an effective reaction. As a bonus to this design by using the exhaust over a sealed …
A benchtop scrubber. | Gold Refining & Metal Extraction …
I have 3/8 fitting on the top of the condenser, so that is my ID of my outlet to the scrubber. I have access to some money (just not a great deal), and just about every tool known to man in my shop at our disposal. I don't know what to do to get the fumes through the scrubber. Positive pressure is easiest for me to do. But it is not the right ...
Nitric acid fumes | Gold Refining & Metal Extraction Forum
Using HNO3 (nitric) in any process can be dangerous. Under "build your own equipment" there are some post about building and using fume hoods and scrubbers, you might want to check them out. It is always better to be safe then sorry. Butcher has wrote some great post on NO and NO2 you might want to read also. Ken.
Making my own Fume Hood!
Build a hood with an appropriately sized blower and add a scrubber to remove emissions in need of scrubbing, like NOx, or the Sulfur Dioxide from precipitating …
Fume scrubber
If I need a different type of scrubber for each application, or if I have a homemade scrubber with different levels in said scrubber like one section with carbon, one with urea, one with baking soda etc. What is the most efficient option for scrubbing …
Neutralizer-Scrubber of acidic fumes & gases | Page 4 | Gold Refining
The type of plastic will be determined by the scrubber solution and type of gas you chose to scrub. In each column fill it up about 6in with the plastics. You will need to attach a line filter to the end of each tube inside the column. This will prevent you from sucking the media out.
Fume hood with scrubber plans
I am designing a simple fume hood and scrubber that should eliminate all fumes. I will post pictures when I finish it. It will be a two stage scrubber that will allow the fumes to pass through very slowly. I am using aquarium bio balls to increase the the surface area that the fumes pass over. I started this project with a few goals in mind. 1.
fume hood and scrubber | Gold Refining & Metal …
Spewing NOx fumes into your work area because some joker told you their carbon filter would work. Scott . Reply. ... doing this under a hood. I use the fume hood for all other reactions, and small assay samples. I ran the vent from the scrubber, straight up through the drywall roof, then the house roof and made sure it was a good 18 inches …
Gold Refining System "ZERO EMISSION"
Reduction of acidic fumes emissions; Recovery of nitric acid; Higher process efficiency: allowed quantity of silver content in the alloy to refine up to 20%; Reduction of manpower for control and operations; The system …
Scrubbing | Gold Refining & Metal Extraction Forum
#1. SCRUBBING NOx FUMES. To be legal, you all must find some way to scrub the brown fumes from aqua regia and nitric digestions, at the very least. Besides …
DIY ACID FUME SCUBBER | Gold Refining & Metal Extraction …
also if this will be enough to scrub fume from refining of about 300-500g. Taking the larger figure you will utilize a little over 1/2 a liter of nitric. First stage your nitric additions so they enter slowly to decrease the red cloud and second denox with sulfamic acid. This will minimize the NOx burst your scrubber sees.
Fume scrubber | Gold Refining & Metal Extraction Forum
Has anyone considered pre-fabricating for sale a fume scrubber system for the small refiner that could be re-assembled by a non-plumbing / non-HVAC / non-electrician person? Sadly, I can put oil in my vehicle and do a bang up job as a computer triage technician but I suck at most handyman type things. I can read instructions and put …
fume scrubber attaching to hood
Scrubbers are attached to flasks to take fumes directly from the reaction before they enter the fumehood. The airflow through the fumehood is to keep any fumes away from you when something escapes or you are not scrubbing. In that case the fumes are diluted by the volume of air passing. Strong reactions need scrubbers.
New fume scrubber design
Plus with a 10 CFM eductor, the time the fumes remains exposed to your scrubber chemistry is exceptionally long for an effective reaction. As a bonus to this design by using the exhaust over a sealed reactor, 100 ounce digestions are completely handled by the 10 cfm flow.
Solution in scrubber to kill off chlorine gas? | Gold Refining …
The reaction is 2NaOH + Cl2 ==> NaCl + NaOCl + H2O. NaOCl attacks glass, so improperly designed FRP shell construction or FRP circulating pipes can be ruined as the glass fibers are consumed. In addition, if the scrubber blowdown liquid is later acidified (as in a waste water treatment plant) the NaOCl breaks down, releasing chlorine …
Scrubber for smelting | Gold Refining & Metal Extraction …
All, The ICP result for my alloy metal is ready, Cu is 58%, Zn at 38%, and gold is not ready yet. This was from few pieces pf gold finger cards. I tried the following scheme trying to burn the toxic fumes coming out of smelting boards, to inert it through water then through a bucket filled with hot charcoal. Please advise. Regards Kj