Abstract:

To break the traditional grinding，grading and leaching process in the existing production of the cyanide，and to achieve the goal of improving the grinding efficiency，cyanide recovery and reduce production energy consumption，the experimental research of cyanide grinding leaching process for the Jinchiling gold deposit was conducted.Through comparing the mineral one-time grinding leaching experiment and piecewise grinding leaching experiment，founding that mineral one-time grinding to qualified fineness（-400 mesh fineness up to 90%），leaching 12 h，cyanide recovery rate can reach 99.5%.Stage grinding sectional leaching time grinding fineness of -400 accounted for 75%，an extraction time is 16 h，after the classification +400 regrinding fineness was 91%，the extraction time is 12 h，the total recovery rate up to 99.64%.Stage grinding leaching mill total energy saving is about 15%，cyaniding recovery rate can be increased by 0.14%，saving energy and improving the recovery rate from the perspective of stage grinding leaching is good.

Key words: cyanide, grinding leaching process, save energy, recovery rate