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这是一种从矿石中快速回收金、银等贵金属的电化学方法.是矿浆状态的矿石与电介质氰化钠和氢氧化钠相结合,氢氧化钠是用来提高碱性使之至少达0.01当量/升.将这种矿浆和电解液放入一个回收装置里,直接与装置内具有一定极问距离的大面积阴、阳电极相接触,较好的极间距离为1厘米或更小.电压加到电极上以便使矿浆中的电流密度达到10～20安培/米~2.搅拌矿浆造成矿粒扩散使之与电极接触以促进贵金属的溶解.这种搅拌更进一步将贵金属络合物输送至阴极并使之电沉积于阴极,而且还有络合剂游离出来进而电解溶解贵金属.上述过程和这种回收装置明显地提高了从矿石中提取贵金属的回收率,而且和常规的氰化法提金相比,在某些情况下可大大地缩短回收时间,常规氰化需3到24小时,而该法则少于10分钟.
This is an electrochemical method for rapid recovery of precious metals such as gold, silver and other minerals from ores, which are ore-like ores combined with dielectric sodium cyanide and sodium hydroxide, which are used to raise the alkalinity to at least 0.01 Equivalent per liter The slurry and electrolyte are placed in a recovery unit and brought into direct contact with a large area of female and male electrodes within the unit which has a minimum distance of 1 cm or less. The voltage is applied to the electrodes so that the current density in the slurry reaches 10-20 Ampere / m ~ 2. Agitating the slurry causes the mineral particles to diffuse into contact with the electrodes to promote the dissolution of the noble metal, which agitates the noble metal complex further To the cathode and electrodeposited to the cathode, but also the complexing agent to free and thereby electrolytically dissolve the precious metal.The above process and this recovery device significantly improve the recovery of precious metals from the ore recovery, and conventional cyanidation In some cases the recovery time can be drastically reduced in comparison with the withdrawal of gold, which takes between 3 and 24 hours for conventional cyanidation and less than 10 minutes for this rule.