Table 3 First run laboratory results.
From: Thiosulfate leaching in carbonaceous gold-bearing ores in Ethiopia
Test-1 | Sodium thiosulfate (9 g/l) | |||
|---|---|---|---|---|
Time (hr.) | Au in solution (g/t) | Percent recovery (%) | pH | Free TS (ppm) |
0 | 0.00 | 0.00 | 10.0 | ND |
2 | 0.32 | 25.64 | 11.18 | ND |
4 | 0.40 | 32.05 | 10.90 | ND |
8 | 0.52 | 41.67 | 10.62 | ND |
24 | 0.71 | 56.89 | 10.07 | ND |
30 | 0.74 | 59.29 | 9.79 | ND |
48 | 1.13 | 90.54 | 10.24 | ND |
Test-2 | Sodium cyanide (0.5 g/l) | |||
|---|---|---|---|---|
Time (hr.) | Au in solution (g/t) | Percent recovery (%) | pH | Free CN- (ppm) |
0 | 0.00 | 0.00 | 10.0 | 500 |
2 | 0.26 | 20.83 | 10.26 | 460 |
4 | 0.35 | 28.04 | 10.24 | 450 |
8 | 0.51 | 40.87 | 9.97 | 350 |
24 | 0.63 | 50.48 | 9.86 | 300 |
30 | 0.72 | 57.69 | 10.65 | 285 |
48 | 0.77 | 61.70 | 10.24 | 200 |
