Japan's Kagoshima Prefecture Kushikino gold and silver mine and its affiliated households rock gold mine, mainly quartzite sulfide ore. The Chuanmuye gold and silver ore contains 7.1g∕t, silver 53g∕t, and the ratio of gold to silver is about 1:8.
The two ores were first crushed by a jaw crusher to -70 mm and then washed. After removing the waste rock by hand, it was crushed in a 1.2 m cone crusher and sieved through a vibrating sieve. The sieved ore block is returned to the cone crusher and then crushed. The sieved ore is sent to the 2.4m×6m cone ball mill for grinding with the washed ore. After the grinding machine and the classifier are composed of closed loop grinding to -0.295mm (48 mesh), the classifier overflows to the Ф1.8m×4.2m tube mill and the float type classifier to form a closed-circuit grinding to -0.074mm (200 Project).
The floatation type classifier overflows through a 1.8m×3.6m thickener, and then adds sodium cyanide and a small amount of lead nitrate to 8 leaching tanks (6 sets of Ф8.53m×6.7m, 1 set of Ф12.2m×3.68m). , 1 set Ф 12.7m × 5m), air and mechanical stirring leaching for 4d. The slurry was filtered through a Moor vacuum filter, and the noble liquid was precipitated in a 3 m × 9 m × 1.5 m tank to remove coarse particles, which were then filtered through a 6 m × 1.5 m sand filter. After expensive clean-deoxy were dried and zinc powder cementation of gold. The precipitate is dried and smelted, and finally gold and silver are recovered by electrolysis.
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