GOLD CYANIDATION PROCESS INTRODUCTION

Writer： admin Time：2020-04-17 16:40 Browse：℃

COLD CYANIDATION process is mainly include: decontaminate, concentrate before leaching, leaching and adsorption, desorption and electrowinning, hydrometallurgy, regeneration of activated carbon, tailings filting, waste water treatment and so on.

1、Decontaminate impurity: remove the impurity like the bits of mood before cyanide adsorption, avoid the bits of mood adsorb the gold from slurry, avoid the bits of mood block the carbon separator.

2、Concentrate before leaching, usually to reach a suitable leaching concentrate, the slurry should be dewatered through the thickener before leaching, the concentration could influence the leaching time and influence the float of activated carbon.

3、Leaching and adsorption: put the slurry after decontaminated and concentrated into the high-efficiency leaching tank, there are 5-8 tanks normally, add cyanide solution into the former two tanks, add activated carbon into the other five tanks, activated carbon adsorb gold become the loaded gold carbon, the loaded gold carbon lift into the lifting screen by air lifter, the lifting screen separate activated carbon and slurry.

4、Desorption and electrowinning :  the desorption of activated carbon and electrowinning the liquid gold are completed in a closed system, in a high temperature and high pressure, activated gold carbon after desorption and electrowinning become gold pulp and barren carbon. Main equipment including: desorption column, acide tank, heater, filter, desorption tank, electrowinning tank and so on.

5、Smelting: after acide washing and decontaminate, gold ingot will be smelted. With the method of hydrometallurgy, the gold grade could be 99.99%.

6、Application of the regenerated activated carbon: the activated carbon after desorption make acide washing to remove the carbonate accumulate, after times of using that need heating activated to regenerate the carbon, then for recycling. Main equipment including activated carbon regenerated tank, water quench tank, fine carbon separate screen.

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