Working Principle and Structural Advantages of Leaching Agitation Tanks

 Leaching agitation tanks are key equipment in gold cyanidation, CIP, and CIL systems. Although their appearance seems simple, their internal flow field, aeration mode, and impeller design directly determine performance. Understanding the working principle and structural advantages helps mines make better equipment choices.

The working principle of a double-impeller leaching agitation tank is based on forced circulation and uniform mixing. When the impeller rotates, slurry is drawn downward in the central area. It then flows outward and upward through damping plates, creating a stable up‑down circulation. This pattern ensures no sedimentation and uniform slurry distribution.

Meanwhile, air enters through the hollow shaft and is released near the bottom impeller. The high-speed shearing action breaks air into fine bubbles, which mix with slurry and rise slowly. This greatly improves oxygen dissolution, which is essential for efficient gold leaching.

Structurally, professional leaching agitation tanks have several core advantages. First, the double-impeller system provides stronger flow ability than single impeller. Second, the large-diameter, low-speed design reduces power consumption and carbon wear. Third, encapsulated impellers with wear-resistant rubber or PU extend service life.

Multi-point air supply and hollow shaft ventilation ensure uniform aeration. Unlike surface aeration, bottom aeration improves contact time between bubbles and slurry. The tank body is usually equipped with damping plates to stabilize flow and reduce vortex.

The transmission system adopts stable and reliable design, ensuring smooth operation and low failure rate. The whole machine is compact, easy to install, and requires low maintenance.

In actual production, these structural features translate into higher leaching rate, higher carbon adsorption efficiency, lower energy consumption, less wear, and longer equipment life.

For mining engineers and plant designers, the working principle and structural design of leaching agitation tanks are key factors in process efficiency. Choosing a scientifically designed leaching tank greatly improves the stability and economic benefits of the entire production line.