Method of leaching copper sulfide ore
View Patent ↗Disclosed is a method of copper leaching without reducing the growth of iron-oxidizing bacterium and the iron-oxidizing capacity when leaching copper from a copper sulfide ore with the use of a sulfuric acid solution to which iron-oxidizing bacteria and silver have been added. Also disclosed is a method of leaching copper from a copper sulfide ore, including adding a naturally occurring nitrogen-containing organic component to a leaching solution upon copper leaching from a copper sulfide ore with the use of, as the leaching solution, a sulfuric acid solution to which iron-oxidizing bacteria and silver have been added is provided.
1. A method of leaching copper from a copper sulfide ore, comprising
adding a corn steep liquor to a leaching solution upon copper leaching from a copper sulfide ore,
wherein the concentration of the corn steep liquor in the leaching solution is 0.05 to 0.1 g/L and the leaching solution comprises a sulfuric acid solution to which iron-oxidizing bacteria and silver have been added.
2. The method according to claim 1 , wherein the copper sulfide ore is a copper sulfide ore or concentrate containing chalcopyrite as a main constituent.
3. The method according to claim 1 , wherein the silver concentration in the leaching solution is 10 to 50 mg/L.
4. The method according to claim 2 , wherein the silver concentration in the leaching solution is 10 to 50 mg/L.