razvanflorin
Well-known member
Hi Dear Friends ! i have some problems.
I have processed before 1Tone of silver plated aluminium boxes in nitric acid, i have percipitated with copper and got 7.5 kg of Silver, that's okay for me.
i have procesed them in an 1000 Liters vessel cuted from the middle adding about 200 kg of aluminum boxes, wait to dissolve the silver then put the boxes out, wash and add anothers.
The Second time i have made a smaller bath of 500 kg and got 4 KG of silver.
This one was made in a 100 Liter vessel , adding about 40 kg of aluminum at once, wait for silver to dissolve then add anothers.
The difference is that from the first batch i have got 0.75% of silver.
And from the second bath i have got 0.80% of silver.
My mistake is that in both of them i have used a lot of Nitric .
in the first one i have used 100 liters of 50% nitric and 100 liters of water.
in the second one i have used about 30 liters of nitric and 30 liters of water. ( i don't remember exactly) it was a very long time ago.
in fact i wanna say that i have used alot of nitric. in the second much and in the first very much !
the differnce of silver quantity it is of 0.05% , everybody can tell me that is because i have lost it in washings, filterings or the purity of silver was bigger/lower. sure, why not ? but the bigger problem is that one of my friend just processed a little bath of 10 kg aluminium and got 1% of silver, this is a big difference for me.
so now, what i want to ask is about that:
i have used 100 liters of nitric and 100 of waters for a low quantity of silver
then i have used a lower quantity of nitric and got a bigger yield.
my friend have done a test batch of 10kg of aluminium so he used a very low quantity of nitric, and got a bigger yield.
it is quite clear to me that i have to use just the need nitric for my quantity of silver. ex: 1 liter of 50% for 1 gram of silver. i have used a lot more before to make it work faster.
so again i have got a big quantity of aluminium, about 700 KG so i have to use 7 liters, i need a batch of 200 liters of water. would it work? 7 liters of nitric in 200 liters of water? how faster? it would work enough better if i simmer it ?
I have processed before 1Tone of silver plated aluminium boxes in nitric acid, i have percipitated with copper and got 7.5 kg of Silver, that's okay for me.
i have procesed them in an 1000 Liters vessel cuted from the middle adding about 200 kg of aluminum boxes, wait to dissolve the silver then put the boxes out, wash and add anothers.
The Second time i have made a smaller bath of 500 kg and got 4 KG of silver.
This one was made in a 100 Liter vessel , adding about 40 kg of aluminum at once, wait for silver to dissolve then add anothers.
The difference is that from the first batch i have got 0.75% of silver.
And from the second bath i have got 0.80% of silver.
My mistake is that in both of them i have used a lot of Nitric .
in the first one i have used 100 liters of 50% nitric and 100 liters of water.
in the second one i have used about 30 liters of nitric and 30 liters of water. ( i don't remember exactly) it was a very long time ago.
in fact i wanna say that i have used alot of nitric. in the second much and in the first very much !
the differnce of silver quantity it is of 0.05% , everybody can tell me that is because i have lost it in washings, filterings or the purity of silver was bigger/lower. sure, why not ? but the bigger problem is that one of my friend just processed a little bath of 10 kg aluminium and got 1% of silver, this is a big difference for me.
so now, what i want to ask is about that:
i have used 100 liters of nitric and 100 of waters for a low quantity of silver
then i have used a lower quantity of nitric and got a bigger yield.
my friend have done a test batch of 10kg of aluminium so he used a very low quantity of nitric, and got a bigger yield.
it is quite clear to me that i have to use just the need nitric for my quantity of silver. ex: 1 liter of 50% for 1 gram of silver. i have used a lot more before to make it work faster.
so again i have got a big quantity of aluminium, about 700 KG so i have to use 7 liters, i need a batch of 200 liters of water. would it work? 7 liters of nitric in 200 liters of water? how faster? it would work enough better if i simmer it ?