① The dosage can refer to the usage of sodium cyanide, and it is recommended to conduct beneficiation tests and refer to its optimal conditions (usually about 1-2 kg/ton of oxidized ore, with the mass concentration of the solution generally maintained at 0.3-1.2% 0 or the titration concentration of the solution at 0.075-0.3 ‰, adjusted appropriately according to different ore grades and harmful components).

② The calculation method for dosage: dosage=(optimal concentration value of the medicine - measured concentration value of the medicine) x water volume in the dosing tank; Assuming the optimal concentration value of the solution is 1.2% 0 (based on water volume), the concentration of the return solution is 0.6% 0, and the lean solution pool has 500 cubic meters of water, the amount of replenishment is (1.2-0.6) × 500=300 kilograms.

Drug concentration: Due to the different composition and acidity of different ores, the mass concentration of the drug (% o) should be calculated based on the optimal titration concentration (9% o) obtained from the test of the ore sample (calculated according to the following formula):

The mass concentration of the solution (‰ o) is equal to the titration concentration of the solution (‰ o) multiplied by 4 (4 is an empirical value). For example, if the ratio concentration of the medicine is 0.07 ‰, then the mass concentration of the medicine (‰ o) is 0.07% 0 × 4=0.28 ‰ o (i.e. the ratio of medicine to water is 0.28:1000), and the gold extractant is added according to the calculated ratio.