Search results for query: hood

What about a carbon filter in your fume hood vent?

...fumes and care should be taken around plants and animals, including humans. I used 250 gallon totes, and set buckets in them, similar to a fume hood. And yes, H2O2 will decompose with sunlight, but it is only used to kickstart the CuCl2, not to keep it running, the air pump will work better...

...silver Though the potassium nitrate method does work it is trickier to get all the sulfide to completely reduce to silver so there is a likely hood of some silver going off in the slag Rebar works best for this - here is an "old" discussion about smelting silver sulfide with iron (which is...

...housing and motor assembly. All components exposed to the airflow appear to be a plastic or nylon. This was essentially free. While I still must identify correct power source for the electric motor, can anyone point it what might be a down side to using this with a fume hood? V/R Tim...

...and motherboards, removing the cords from wires separating gold, silver, platinum, palladium copper, and aluminum, and then getting my fume hood prepared and built. I have finally finished the design phase. I say that, but if you wait, something will change beforehand. I've been...

Make up air always helps but refineries are always hot in summer and cold in the winter. Making a hood like this helps. making a hood with a plain steel blower Air intake from outside the refining space exhausts less CFM from the workspace.

I fear the hood fan will fail way before any other problems occur and if you are processing indoors you will have a serious problem on your hands if it fails during an actual process. I would suggest putting it outside under a covered area with openings on at least two sides where at least you...

...recovery use the ferrous, then the second round, where there is much less junk is in the material? I was worried about the waste water amount with this method, but it is something to try regardless. I fixed the fume hood and seems to be performing much better. Just a few more tweeks needed.

...cross country...) I'm getting set up again to start collecting and refining now that the dust is settling in my new house. I've got my fume hood mostly complete and have started looking around for good sources of scrap. My seed money to get going again is stored in this large pickle jar...

...aluminum), electroplating, electroforming, and electroless plating primarily with nickel, gold. and palladium. I have a home lab with 2 fume hoods, ovens, glassware, couple great microscopes, balances, and other types of cool labby stuff. I have lots of other hobbies, so metallurgy is just...

...run. Addition of Zn dust, dosent give any reaction. There is no buble and no precipitate. It's maybe because of lack of free KCN. Under fume hood, we add HCl to the solution which contain Zn. There is some buble and at some point the solution become colorless. After letting it stand...

Put a simple roof up on the pad and use fencing to keep animals and kids out until you can secure it better, the hood motor may work for months or years but it will fail because of the acid fumes and you can almost guarentee it will fail mid process or while you are letting the process cool...

Sounds good enough if you keep the fumes down. The fan can corrode if not resistant to the fumes. You need to learn more about recovery processes. Lots of info here Search for the AP process. If there was some of one acid left from a first leach, the second will create some weak AR and...

You need retention time in contact with water. For that you need either depth (which needs pressure) or a coloumn with large wetted surface which don’t need much pressure but need a flow/suction.

Appreciated and welcomed. I know the fan isn't suitable for long term. It is what was available on hand from a trailer house we scrapped out. At this time I am trying hard not to invest actual money beyond necessary safety. However, I am actually stumped as to what I am looking to replace it...

If you do decide to use reverse AR then do so under a hood , put your item in a beaker and cover with nitric and slowly add drops of HCl slowly into your beaker and mix , do not premix your acids, the trick is to be able to dissolve the gold alloy and very little of the base material, you will...

...that masks aren’t gonna keep any sort of acids (especially in gaseous form)out of my system, I was being sarcastic. I work outdoors under a fume hood, and I get rid of my waist by giving it to my buddy who works in an industrial refinery, they have the proper channels to dispose of the waste...

Generally lab hoods are designed to evacuate 100 CFM for every square foot of hood opening. This gives decent airflow to remove the dangerous fumes from the work area. Fume scrubbing is a different matter. Build a hood with an appropriately sized blower and add a scrubber to remove emissions in...

Here a suggestion but it is dangerous you need a good fume hood you can add bleach to dissolved HCl/H202 or Nitric acid to gold and other salts or add chlorine gas or SO2 gas to precipitate out the precious metals. Both are dangerous and a fume hood or lots of ventilation is required (A MUST).

...realize they have boxed themselves into perpetual debt. You will be amazed how much jewelers karat gold scrap one can process in a 4' exhaust hood and a small gas melt furnace. Start small, do your research first, and don't overreach. Keep those principles in mind as you succeed because...

Thanks for the info guys. It would be nice if there is a thread for photos of peoples fume hoods to draw inspiration from

Welcome. Here is some reading for you. Start with Safety and dealing with waste. Hokes book gives an easy introduction to the most basic Chemistry we use. We ask our new members to do 3 things. 1. Read C.M. Hokes book on refining jewelers scrap, it gives an easy introduction to the most...

...large volumes to process, slow reactions covered with a watchglass or a small scrubber flask works fine for most processes. As long as the fume hood draws in enough air to keep small gas escapes away from you your fine. Those tiny amounts that escape will get diluted enough to be blown out...

...recovery and present the Rh sulfate in sufficient purity to use it again. This certainly could be done, and if you have all means, chemicals and PPE+hood, try it yourself. My point was just that do not expect the best results, as many (like myself) struggled a lot with Rh chemistry and...

...chemical vapors, usually NOx and chlorine gasses. We were both chemists, professionals, graduated, working with harmful stuff in proper fumehoods... I experienced breathing in NOx fumes, it was bad, it hurt, last for week or two if it was more than just slight whif. I do not say it is...

...work with Nitric at home, so I am stuck using Sodium Nitrate to make poormans. I used this to dissolve about 22 grams of 8.5k gold in my fume hood, as one does, and had no problems doing so. Afterwards I discovered I had used too much NaNO3 and so I needed to denox. My solution was hot so...

The hoods in University and corporate labs where I used to work always had enameled steel walls and ceilings, and a slate floor. YouTube has dozens of build it yourself videos that show how to build your own hood using laminated plywood or strandboard. Some even show recommended blowers and how...

Be aware of the dangers of PGM salts and make sure you have a decent fume hood and proper protective gear. Separating the different metals successfully is far from easy so my advice would be to recover the gold and any silver and then cement the PGMs out and save as a rainy day fund.

I'm trying to follow what you wrote. Can you explain the test you wrote here a little more? Heating alcohol to 50C? How safe would it be? ? Do you have a visual of a positive result? That would be great to see. What kind of results does it give for PGM? For example, what results does it give for...

Ah, yes I'm trying to understand the whole concept behind it though. It would really make it easy for me to know how exactly it all works.