The 500 t/d gold CIP (Carbon-in-Pulp) production line utilizes a mature process for treating argillaceous oxidized ores or gold flotation concentrates. By eliminating the need for costly solid-liquid separation equipment and recovering gold through direct adsorption onto activated carbon from the cyanide pulp, this process offers significant advantages: a streamlined workflow, environmental friendliness, and high recovery rates.

Within the production line, the grinding and classification stage is critical to determining the gold leaching rate. To achieve a product fineness where over 70% of the material passes through a 200-mesh screen—thereby ensuring sufficient liberation of gold minerals—a daily throughput of 500 tons requires a ball mill capable of processing approximately 20 to 25 tons per hour.

To meet this capacity requirement, a wet overflow-type ball mill with specifications of Φ2100×4500 or Φ2200×6500 is recommended. Under standard operating conditions, these models offer a stable processing capacity of 20 to 30 tons per hour, perfectly aligning with the 500 t/d production target. Furthermore, the overflow discharge mechanism allows for precise control over discharge particle size, preventing over-grinding—which could otherwise lead to excessive pulp viscosity—and thereby creating ideal pulp conditions for the subsequent cyanidation leaching process.

Regarding specific parameter configurations, taking the Φ2200×6500 ball mill as an example: the shell rotation speed is typically maintained at approximately 24 rpm, the grinding media charge is around 23 tons, and the unit is powered by a 245 kW motor. During actual operation, operators can utilize a variable-frequency drive (VFD) system to adjust rotation speed and feed rate in real-time, maintaining pulp density within an optimal range. This scientifically sound approach to parameter matching and equipment selection not only significantly enhances grinding efficiency but also effectively reduces electricity consumption per ton of ore, laying a solid foundation for efficient gold extraction.