SMB or ferrus sulphate
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andees78
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yes harold you are right. but thats the only thing i have now. maybe i will wait until i find another source. in where i live i cant just go to a hardware store or household supply store and find common chemicals like stump or concrete cleaners, i have to go to a chemical supplier. even i thought about buying ferrus from fertlizer shop and the smallest they have is a 50 kilo bag.
but tell me just to eleminate choices, do smb and ferrus s. do the same job?
but tell me just to eleminate choices, do smb and ferrus s. do the same job?
It sounds to me like you could save a lot of money that way. I buy many things online, it's really pretty simple.
I found some stump out for you to look at, hope this idea helps you.
http://www.acehardwareoutlet.com/productdetails.aspx?sku=72769&source=GoogleBase
I found some stump out for you to look at, hope this idea helps you.
http://www.acehardwareoutlet.com/productdetails.aspx?sku=72769&source=GoogleBase
philddreamer
Well-known member
Hi Andees!
SMB is also used in the making of beer & wine as a preservative. Any brewery supplies store near you? I know you live in Sudan & maybe not.
SMB is also used in the making of beer & wine as a preservative. Any brewery supplies store near you? I know you live in Sudan & maybe not.
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That's the deal to explore. If the material isn't brown, and it isn't terribly expensive, go for it. Having too much is a lot better than not having enough. If you can examine the contents, as long as there's green crystals in the bag, it will work. It it has oxidized, it will have turned brown, and will no longer function to precipitate gold.andees78 said:
It would be a good idea to store the material in tight jars once you make the purchase. It has a long shelf life if you can keep it dry.
Yes, they both do the same thing, precipitate gold. Unless you use SO2 gas from a cylinder, instead of SMB, there is no particular reason to not use ferrous sulfate.
Do remember---if you can purchase sulfuric acid, you can make your own ferrous sulfate. Dissolve steel (angle iron, for example) until you have saturated the solution. Filter, to remove solids, then allow the solution to grow crystals, or you can use it as a liquid.
Be certain to read Hoke, where there are instructions for the use of ferrous sulfate.
Ferrous sulfate, from pills, isn't a good idea. The pills would have to be crushed, dissolved, filtered, then used. There is precious little iron in a pill----it is, primarily, a huge amount of filler. It would be a very expensive (and inconvenient) way to procure ferrous sulfate.
Harold
If you are purchasing ferrous sulfate and sodium metabisulfate you need to take into account that it requires about twice the amount of ferrous than it does SMB to precipitate a given quantity of gold when doing a cost comparison.
If access to chemicals is the issue, it is simple to make your own ferrous sulfate. I cannot imagine many places where you cannot find iron and battery acid.
I personally prefer SMB because the gold precipitate from ferrous is very fine and a bit sticky. You need to be a bit more careful in your washing techniques as well when using ferrous as iron is rather injurious to gold. Fortunately it washes out well.
If access to chemicals is the issue, it is simple to make your own ferrous sulfate. I cannot imagine many places where you cannot find iron and battery acid.
I personally prefer SMB because the gold precipitate from ferrous is very fine and a bit sticky. You need to be a bit more careful in your washing techniques as well when using ferrous as iron is rather injurious to gold. Fortunately it washes out well.
