Ayham Hafez
Well-known member
I started this discussion in another thread but I think it worth to be discussed in separate thread.
I will start from Jason videos links
In above videos we will see that sulphur added as a flux for E-waste smelting to sulphurize base metals, and he did different experiments with different fluxes recipe, as a conclusion it shows that sulphur very easy controls the base metals content in the E-waste expect tin!
Friend of mine advised me to use sulphur before I Know about those videos but maybe he got the idea from them, anyway I did an experiment with coax gold plated connectors that most of their weight is copper, I added 10% from their weight sulphur and at the end I got about 50% of the copper weight into the matt, sulphide matt, which I Know that I can recover the copper from it very easy by milling and roasting it or as Jason mentioned to smelt them with adding some iron.
@Yggdrasil wondered how sulphur not burned or evaporated before it combined with base metals since sulphur burned and evaporated in very low temperature? Really I don't know, what I know from my experience increases the wondering about this point, cause from my experience we roast gold ore to evaporate and reduce sulphur content, in the other hand, when I make tests in the past on recycling acid batteries, I tried to decrease the needed iron to reduce the smelting cost by heating the acid batteries paste that has lead sulphate PbSO4 in the rotary furnace before increase the temperature and start melt the lead but I failed, I noticed that there is no way to reduce lead sulphate into lead element without iron, so sulphur not evaporated by heating or roasting. (I didn't roast galena ore which has PbS not PbSO4 to see if sulphur evaporated from it by roasting)
If really sulphur do its magic as I noticed from my small experiment and from Jason videos, i think it will be the best way for recovering precious metals from E-waste, much more faster and affordable than even use copper electrolysis refining cell.
Hope someone in the forum have experience with it, I always be afraid from easy methods, sulphur makes precious metals recovering from e-waste really easy , so I'm trying to know if there any issues with using sulphur, and why tin not sulphurized as shown in the videos.
I will start from Jason videos links
In above videos we will see that sulphur added as a flux for E-waste smelting to sulphurize base metals, and he did different experiments with different fluxes recipe, as a conclusion it shows that sulphur very easy controls the base metals content in the E-waste expect tin!
Friend of mine advised me to use sulphur before I Know about those videos but maybe he got the idea from them, anyway I did an experiment with coax gold plated connectors that most of their weight is copper, I added 10% from their weight sulphur and at the end I got about 50% of the copper weight into the matt, sulphide matt, which I Know that I can recover the copper from it very easy by milling and roasting it or as Jason mentioned to smelt them with adding some iron.
@Yggdrasil wondered how sulphur not burned or evaporated before it combined with base metals since sulphur burned and evaporated in very low temperature? Really I don't know, what I know from my experience increases the wondering about this point, cause from my experience we roast gold ore to evaporate and reduce sulphur content, in the other hand, when I make tests in the past on recycling acid batteries, I tried to decrease the needed iron to reduce the smelting cost by heating the acid batteries paste that has lead sulphate PbSO4 in the rotary furnace before increase the temperature and start melt the lead but I failed, I noticed that there is no way to reduce lead sulphate into lead element without iron, so sulphur not evaporated by heating or roasting. (I didn't roast galena ore which has PbS not PbSO4 to see if sulphur evaporated from it by roasting)
If really sulphur do its magic as I noticed from my small experiment and from Jason videos, i think it will be the best way for recovering precious metals from E-waste, much more faster and affordable than even use copper electrolysis refining cell.
Hope someone in the forum have experience with it, I always be afraid from easy methods, sulphur makes precious metals recovering from e-waste really easy , so I'm trying to know if there any issues with using sulphur, and why tin not sulphurized as shown in the videos.