Search results for query: hood

Hello all.. I did not find an answer to this question posed back in July 1, 2020. Can someone enlighten me? Are the stock pot fumes a concern to someone who is careful and cautious ? Should it be covered loosely or sealed? Can I keep it outdoors in a secure place (not in the winter, of...

...want the nitric out. Keep enough room in the beaker for the reaction and have a catch basin. Do it room at temperature. Do you have a fume hood? A scrubber flask could reclaim some of your wasted acid. I bet those gold foils were gone in seconds. Did it almost boil over...

...started I didn't have a spot plate and I really didn't know any better so I put some drops in the solution itself. I don't do that now. As for safety I wear gloves a respirator and have a workshop with a fume hood that I made. I do appreciate the help, sorry again. I'm at work I'll post later.

Gov. of Canada stuff, no idea what they were used for; if sold to the public would they really sell stuff that contaminated? EDIT: Saw your other reply, could you recycle those 1cm thick plexiglass sheets from monitors as an interior wall attached to wood/plywood?

Yes I do

You also might try using a coupling to attach a long shaft with fan blades into the hood enclosure thus keeping your motor out of the hood. Another avenue is to use a leaf blower that blows into a duct with the top of your fume hood attaching to the ducting at a 45 degree angle. This creates the...

Welcome! No mask will protect against the gases here, one need to use a fume hood. Well not entirely correct, but it is not feasible, since they have limited life after opening them. They are good as an escape system, not much more. Here are some reading for you. We ask our new members to do 3...

Fair enough, and good call out on the SO2 vs. pipe... won't do it again. Back to fire pit only.

Thank you, this is some real quality info!! I currently have A LOT of pd solution and this should help the final home stretch. Beers on me!

Very nice button! Be very careful working with these acids inside, you need a fume hood at best. A fan in a window will help. While I feel it ruins the looks of clean gold a sign of good purity is how soft the gold is. Lay a piece of gold in the palm of your hand and rub your other hand...

I can't see a problem with that. For performance the only important thing is the speed increase through the actual venturi and a pressure drop "Vacuum" just after, when the speed goes back to normal. But I think the red line needs some more space to be effective. You can clearly see the...

...which gold/silver processing is for me, SHOULD be a challenge. I have not bought anything other than the chemicals, protective equipment, fume hood, gas burner etc that I need. The starting material itself has always been and should be free or only for a symbolic sum (discarded electronics...

...I processed the sludge by diluting the solution, adding a bit more nitric, and letting it sit on a 90 degree Celsius hot plate under a fume hood for a day. I decided to let the solution settle, to siphon off the clear liquid to precipitate with chloride. However I was bit impatient and...

...this inside an enclosed area? Like a shop or garage? I hope it's not a structure that's connected to your home. Do this outside or inside a fume hood. If you are inside a structure, it's not just what's in the vicinity that's in danger. The wiring inside electrical receptacles, light switches...

...a distance, which scared me from proceeding. SO... needless to say im still learning before even considering refining. I plan to build a fume hood and take it from there one day... right now im content learning and reading this forum. I've been here for a while, and everyone seems to be...

In order to get purer gold you have to optimize voltage according to bath resistance

Hi has anyone seen this used before slowly spoon baking powder into AR in beaker on the hot plate at 80deg, in fume hood keep spooning bp slowly as it reacts keep going till it stops while spraying water every so often till its done then filter then smelt?

Platinum rhodium and iridium are highly non reactive to most of our standard acid mixes but I believe rhodium should dissolve in hot sulphuric but should you try this do so in a fume hood in very small quantities, fuming sulphuric is really nasty.

Welcome to us. But I have to correct you a bit here: Your advice is not correct, you will "always" add too much Nitric this way, which will create problems later. This is where most of the Youtube students start using their Urea to overcome their problem, which is also wrong. Use your Urea as...

...AR have. Why are you using the abbreviation GAU, it is the first time I have seen it, so it is not one of the ones we recommend. Use scrubber, because that is basically what it is. There are many threads on the topic of scrubbers and fume hoods. It is there, read them they are quite informative.

Yes it can be done . but with big effort.and knowledge . Iam trying to help him to get it started .he spent a lot of money already .so there is no way back .but the get the electrlises.or sale the product as boulion to refiners

...to acquire , cheap and not overly dangerous to use , you will need to heat the acid so use decent glassware and stay upwind if you don’t have a hood , the gold pieces should eventually just drop off . If you have a hood and access to nitric then use reverse AR which will dissolve the gold...

...and striped well in excess of 100 towers plus lap tops, and a bunch of assorted electronics. I dedicated a shed to work from, built a fume hood outside and even done some experiments that have yielded some finished product. I spent the first few months just learning what i was getting into...

Thanks for your answer Michele, Do

thanks for the tips. I dont have access to any fume hoods, and open outdoor environment is all i have. Id also be wearing the p100 mask, a face shield, and have a fan blowing any fumes away from me (and being upwind of the fan and natures wind). If i got a little more serious i could make a mini...

...on a screen) current drop . The distance between the electrodes (+,- poles) matters. The resistivity of the solution is temperature dependent. fume-hood or working outside. I do not like salt water because in my opinion Cl2 is worse than SO2 and because the lower boiling temperature than...

...and where children and animals can not get ahold of it. Do it where the wind blows the acid fumes away from you if you do not have a fume hood. My opinion is that first you need to soak them in hydrochloric acid to remove as much solder possible if they do have solder. Once you have the...

...in sulphuric acid, will my 12v 4amp battery charger do the job, or should I have a controller for the current. Waiting for parts for the fume hood, so I have time to get other things right. I did think of just going straight to AR but the gold is testing as 24K on these first items. All...

...first time working with Pd in solution - is that right ? Also what kind of refining set up are you working with - actual lab with good fume hood - vacuum filter - magnetic stir/hot plate - 20 liter flask/reaction vessel with heat mantel & overhead stir rod/bar ???? --- pics of your set up...

...use stir rods. I also bought a couple of stir bar retrievers to sacrifice for the PTFE coated rods as extension rods. I drilled holes in my hoods on the top to pass the rods through. I attach the rod to the drill and the drill sits on a wooden support I built for it. I basically built an...