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Sulfide Gold Ores After Cyanidation

     

Hydrometallurgical Process for Concentrating Copper, Gold, and Silver from the Tailings of Sulfide Gold Ores After Cyanidation

Process Description:

The process utilizes calcium sulfide (CaS) and calcium arsenic oxide (Ca3AsO4), which are filtered or washed using a mist tower to remove dust before being discharged into the atmosphere.

After cyanidation, the tailings from sulfide gold ores are fed into a thickening slurry tank. Water is added to adjust the slurry concentration to 40-60%. Under ambient temperature and pressure, the mixture is continuously stirred to ensure uniformity.

Industrial sulfuric acid (H2SO4) is then added to adjust the pH of the slurry to 5. The slurry is stirred for 15-25 minutes to stabilize the pH before being transferred back to the thickening tank.

The slurry's concentration is adjusted to 20-30% with water and maintained at a pH of 6. This step involves continuous feeding and discharge of material.

While stirring, flotation reagents and an emulsifier (2# oil) are added uniformly to the slurry.

The slurry is then transferred to a flotation tank for closed-circuit operations, including primary roughing, secondary scavenging, and tertiary cleaning. Copper, gold, and silver are concentrated through this process.

The process is simple, efficient, cost-effective, with high metal recovery rates.

Requires low investment and demonstrates quick results.

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