...
2025-08-14 22:06
1770
...
2025-08-14 21:58
1943
...
2025-08-14 21:54
1855
...
2025-08-14 21:40
862
...
2025-08-14 21:28
1074
...
2025-08-14 21:15
1196
...
2025-08-14 21:09
1711
...
2025-08-14 20:33
2742
...
2025-08-14 20:24
135
...
2025-08-14 19:41
993
- 1) Leaching: Ammonia-ammonium sulfate solution for leaching with an aqueous ammonia concentration of 5. 5~7. Omol/L, ammonium sulfate molar concentration of 0~lmol/L (adjusted sulfate concentration according to product type) , at a temperature of 20~50 ° C, leaching for 3h~9h, the final infusion solution is used in the next step;