Refractory gold ore grinding solution

1.Product Introduction

The core equipment of a Refractory Gold Ore Grinding Solution is the High-Performance Ball Mill or Rod Mill, which is frequently paired with classification equipment (such as hydrocyclones) to form a closed-circuit grinding system. This setup is designed to achieve efficient and stable ultra-fine pulverization.

2.Application

• Pre-treatment of Refractory Gold Ore: Primarily used for ores where gold is encapsulated in sulfides or hindered by carbonaceous matter, such as Carlin-type gold deposits.

• Gold Concentrate Processing: Before roasting or bio-oxidation, gold concentrates are ground to -200 mesh or finer to increase the reactive specific surface area.

• Large-scale Gold Smelters: Serves as the core grinding unit in the ore processing flow, suitable for medium-to-large industrial production scales.

3.Working Principle

• Feeding: Crushed gold ore or gold concentrate enters the mill.

• Grinding: As the mill cylinder rotates, the internal steel balls (in ball mills) or steel rods (in rod mills) are lifted to a specific height by centrifugal and frictional forces. Upon falling, they apply impact and attrition forces to the ore.

• Liberation: Continuous mechanical action crushes and dissociates sulfide minerals (such as pyrite and arsenopyrite) that encapsulate gold particles, exposing the microscopic gold.

• Classification: The ground product enters classification equipment. Coarse particles are returned to the mill for regrinding, while fine particles that meet the target size proceed to the next stage (such as roasting or leaching).

4.Advantages 

• Efficient Liberation: Capable of grinding ore to an extremely fine particle size (typically <38µm), effectively breaking down sulfide encapsulation structures and significantly increasing gold leaching rates.
• High Processing Capacity: Industrial-grade ball mills can handle daily capacities ranging from dozens to hundreds of tons, meeting the demands of large-scale production.
• Mature and Reliable Process: With highly developed technology and stable equipment operation, this is currently the most widely used grinding method for industrial pre-treatment.
• Strong Adaptability: Suitable for various types of refractory gold ores and can be seamlessly integrated with subsequent processes like roasting, bio-oxidation, or high-pressure oxidation (POX).

5.Technical Specifications

6.Our Solutions