(I'm not an chemistry guy) Grounds in USA are mostly with bigger quantities of carbonates (more than 2%). That's why companies like URG, UEC will use typical alkaline ISR chemistry. In about 2015, PEN realized that their deposit is not a fully recoverable with typical methods. Wayne had mission to change it to a low PH Chemistry, used in most of the world (Kazachstan). Low PH can be used only if carbonates in ground are less than 2%. If not, acid injected underground will dissolve with rocks, creating gypsum and blocking/chocking extraction process.
Low pH lixiviants have technical and economic advantages over alkaline lixiviants in formations that are amenable to low pH solutions (especially those with low carbonate content). Low pH leaching has the potential to recover a higher percentage of uranium (70-90 percent versus 60-70 percent for alkaline leaching), uranium recovery requires fewer pore volumes (PVs) of lixiviant injection, it requires a shorter leaching duration, radium is less soluble in a sulfate medium than bicarbonate medium, it requires less oxidant, and the low pH lixiviant has a higher degree of natural attenuation during restoration (IAEA 2001). Low pH lixiviant is also effective at dissolving uranium that is resistant to other methods such as uranium contained or coated by other minerals (IAEA 1993). The relative disadvantages of low pH compared to alkaline lixiviants include higher chemical costs (especially in formations with carbonate content greater than 1.5-2 percent), risk of well screen and formation plugging due to gypsum precipitation and gas bubble formation, need to use corrosion-resistant materials and equipment, and the higher concentration of most dissolved constituents in the wellfield, which potentially present added challenges for groundwater restoration following mining (IAEA 1993, 2001).
Tomek InvesTB
23-11-2024 09:57
Frederic Guerin is a new CEO of Peninsula. He is a former AREVA/ORANO director.
Tomek InvesTB
27-11-2024 17:15
French Orano after military coup in Niger lost 20% its imports for uranium yellow cake. Now Orano is building biggest centrifuge enrichment facility in North America. They will need uranium to enrich. New CEO of Peninsula come from Orano.
19-11-2024 08:39
https://stocksdownunder.com/article/peninsula-energy/
Biggest ASX forum covering PEN:
https://hotcopper.com.au/asx/pen/
23-11-2024 09:05
Addition: Why Peninsula changed their chemistry?
(I'm not an chemistry guy)
Grounds in USA are mostly with bigger quantities of carbonates (more than 2%). That's why companies like URG, UEC will use typical alkaline ISR chemistry.
In about 2015, PEN realized that their deposit is not a fully recoverable with typical methods. Wayne had mission to change it to a low PH Chemistry, used in most of the world (Kazachstan).
Low PH can be used only if carbonates in ground are less than 2%. If not, acid injected underground will dissolve with rocks, creating gypsum and blocking/chocking extraction process.
Low pH lixiviants have technical and economic advantages over alkaline lixiviants in formations that are amenable to low pH solutions (especially those with low carbonate content). Low pH leaching has the potential to recover a higher percentage of uranium (70-90 percent versus 60-70 percent for alkaline leaching), uranium recovery requires fewer pore volumes (PVs) of lixiviant injection, it requires a shorter leaching duration, radium is less soluble in a sulfate medium than bicarbonate medium, it requires less oxidant, and the low pH lixiviant has a higher degree of natural attenuation during restoration (IAEA 2001). Low pH lixiviant is also effective at dissolving uranium that is resistant to other methods such as uranium contained or coated by other minerals (IAEA 1993). The relative
disadvantages of low pH compared to alkaline lixiviants include higher chemical costs (especially in formations with carbonate content greater than 1.5-2 percent), risk of well screen and formation plugging due to gypsum precipitation and gas bubble formation, need to use corrosion-resistant materials and equipment, and the higher concentration of most dissolved constituents in the wellfield, which potentially present added challenges for groundwater restoration following mining (IAEA 1993, 2001).
23-11-2024 09:57
27-11-2024 17:15
New CEO of Peninsula come from Orano.