The mixed catalyst of pyrite and alkali is a new type of non-toxic and pollution-free gold leaching agent, which completely replaces cyanidation in the process of gold leaching.
In general, the gold leaching rate is more than 2% higher than cyanide leaching.
The application scope is wider than that of cyanidation, including oxidized ore, primary ore, cyanidation tailings, gold-silver ore, silver-gold ore, sulfuric acid slag, pyrite slag, high sulfide ore, high arsenic iron ore, Carlin type ore, iron hat type ore and so on.
Under the same conditions, the cost of gold leaching is lower than that of cyanidation.
Leaching cycle: heap leaching for 4-8 days; Soak in the pool for 3-4 days; Soak in the sink for 1-3 days; Stir for 4.5- 12 hours.
The use of PH value should be controlled between 1 1- 12.8.
In order to adjust the PH value, CaO quicklime and NaOH caustic soda can be used.
Gold adsorption and cyanidation processes can be used.
Under the same conditions, the cost of ore leaching is lower than that of cyanide leaching.
This agent is easier to use than cyanide.
In the production process, cyanide equipment does not need to be replaced or added, only reagents need to be replaced.
The leaching time of heap leaching process only takes 5-8 days, and the leaching rate is 75-98%.
The leaching time of the tank leaching process is 3-4 days, and the leaching rate is 75-98%.
The leaching time of the tank leaching process is 2-4 days, and the leaching rate is 75-98%.
The leaching time of the whole slurry mixing process is 4.5- 12 hours, and the leaching rate is 75-98%.
Gold ore with high arsenic and high iron oxide is directly stirred and leached without roasting, and the leaching rate is over 94%. The leaching rate of pool leaching is over 94%.
The stirring leaching rate of high sulfur ore is over 75%.
The stirring leaching rate of Carlin-type ore is over 80%.
The leaching rate of silver in silver-gold-sulfur-iron slag can reach above 80% by stirring process. The leaching rate of gold is over 95%.
The leaching rate of cyanide tailings by stirring method is over 85%. Heap leaching process is more than 80%.