Flotation Process for Enriching Cu, Au, Ag from Cyanidation Tailings of Sulfide Gold Ore

Introduction

Detailed Process Flow

1. Slurry Preparation

    

   First, feed cyanided sulfide gold concentrate tailings into a slurry mixing tank. Add water to set the slurry concentration at 40% to 60. Stir the mixture continuously until it is uniform. Then transfer the slurry to an acidification tank.

    

2. Acidification Conditioning

    

   Next, add industrial sulfuric acid to adjust the slurry pH to 5. Keep stirring the slurry for 15 to 25 minutes. Maintain a stable pH value of 5 during the whole reaction. Once acidification finishes, send the slurry back to the mixing tank.

    

3. Secondary Slurry Adjustment

    

   Then, add water to recondition the slurry. Set the concentration at 20% to 30% and the pH at 6. We adopt continuous feeding and discharging for stable production. After adjustment, deliver the slurry to a stirring tank.

    

4. Reagent Dosing & Mixing

    

   Meanwhile, stir the slurry constantly in the tank. Add specialized flotation reagents evenly and continuously. Also, add No.2 oil frother to the mixture. This step ensures full mixing of slurry and chemicals.

    

5. Closed-Circuit Flotation Enrichment

    

   Finally, pump the treated slurry into flotation cells. We perform closed-circuit flotation for metal separation. The process includes one roughing stage, two closed-circuit scavenging stages and two closed-circuit cleaning stages. As a result, we efficiently enrich copper, gold and silver from the tailings.

    

Process Advantages