Key Equipment for Placer Gold Mining and Processing

I. Characteristics of Alluvial Gold Resources and Equipment Compatibility Fundamentals

Alluvial gold predominantly occurs within riverine alluvial deposits and terraces, exhibiting widespread distribution and ease of extraction. Efficient recovery relies upon integrated mining and processing equipment operating in concert, accommodating mining requirements from small-scale to large-scale operations. Mobile modular equipment represents the preferred choice for small-to-medium scale mining.

II. Pre-processing Equipment: Establishing the Foundation for Mining and Processing

Pre-processing constitutes the initial stage. Vibrating feeders employ a dual-eccentric shaft design to ensure uniform material delivery, preventing subsequent blockages. Vibrating screens, available in linear and circular configurations, are respectively suited for rapid coarse sand classification and fine sand processing. Screen apertures can be adjusted as required and are often used in conjunction with sluice chutes. Jaw and hammer crushers reduce large gravel to particles under 20 millimetres, preparing material for subsequent processing stages.

III. Washing Equipment: Separating Impurities to Reveal Gold Traces

During washing, the rotary screen combines screening and washing functions. Utilising rotation and spray washing, it removes clay and classifies sand particles, suitable for low-clay-content ores with a processing capacity of 1-200 tonnes per hour. The rotary washer, featuring wear-resistant linings and high-pressure spraying, achieves a mud washing rate exceeding 95%, specifically designed for high-clay-content ores.

IV. Gravity Separation Equipment: The Core of Gold Recovery

Gravity separation is pivotal for gold extraction. Within sluice box systems: fixed sluices cost-effectively recover coarse gold; vibrating sluices dislodge sediment layers to capture medium-fine gold; spiral sluices utilise centrifugal and gravitational forces to separate fine gold. Centrifugal concentrators employ high-speed rotation to isolate gold particles, suitable for fine gold and tailings reprocessing with recovery rates exceeding 95%. Jigging machines employ vertical water flow stratification for efficient coarse gold recovery; shaking tables utilise bed surface motion and lateral water flow to elevate concentrate grades above 90%, serving final purification.

V. Equipment Synergy and Developmental Advantages

Each apparatus fulfils distinct functions through seamless coordination. Combined with modular development, this provides reliable technical support for efficient and economical placer gold extraction.