The ore sample is an oxidized gold ore collected from a concentrator of a gold mine in Burundi. The gold grade of the raw ore is 0.81 g/t, the grinding fineness is -0.074 mm 90%, the pulp concentration is 40%. Lime is used as the pH adjuster. The leaching concentrations of Sodium cyanide and the environmentally friendly gold extractant are both 0.1%. Leaching is carried out at room temperature for 24 hours. After filtration and washing, the gold grade of the tailings is detected, and the leaching rate is calculated. The comparison of the results of cyanide leaching and environmentally friendly gold extractant leaching is shown in the following table.
| Leaching time (h) | Leaching residue Au (g/t) | Leaching rate (%) | Dosage of CaO (g/t) | Pulp pH | Agent consumption (g/t) | Gold leaching agent |
| NaCN | 0 | 0.81 | / | 3000 | 12 | 500 |
| 4 | 0.3 | 62.96 | 3000 | 11 | ||
| 24 | 0.22 | 72.84 | 3000 | 9 | ||
| Environmental Gold Extracting Agent | 0 | 0.81 | / | 3000 | 12 | 500 |
| 4 | 0.27 | 66.67 | 3000 | 11 | ||
| 24 | 0.2 | 75.31 | 3000 | 9 |
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