东川汤丹铜矿采用直接加压氨浸流程所得的试验数据是:矿石磨细至71%为-200目,矿浆固液比1∶1,溶液中氨浓度8.5～10.2%.二氧化碳浓度5.5～6.6%,矿浆温度120～135℃,浸出时间3.2小时,浸出率可达86.5～90%,全氨浸厂工艺回收率为80～83%.造成工艺回收率低的原因,除现用浸出设备的结构不合理,引起铜浸出率不高外,主要损失还存在于固液分离和 The experimental data of direct compression ammonia leaching process in Dongchuan Tangdan copper mine are as follows: the ore is finely ground to 71% -200 mesh, the solid-liquid ratio of the slurry is 1: 1, the ammonia concentration in the solution is 8.5 to 10.2%, the carbon dioxide concentration is 5.5 ~ 6.6%, the pulp temperature is 120 ~ 135 ℃, the leaching time is 3.2 hours, the leaching rate can reach 86.5 ~ 90%, the recovery rate of all ammonia leaching plant is 80 ~ 83% .The reason of low recovery rate, Equipment structure is irrational, causing copper leaching rate is not high, the main loss still exists in solid-liquid separation and