Placer gold beneficiation first uses gravity separation to recover gold and associated heavy minerals.
The process generally includes crushing and screening, desliming, and separation stages.
Screening removes 20–40% waste stones such as gravel and pebbles from placer gold ore.
Desliming removes fine mud below 0.1 mm because it interferes with mechanical separation.
Gold recovery can use sluice separation, jig scavenging, shaking table cleaning, amalgamation, magnetic separation, and electrostatic separation.
Alluvial Gold Processing
Alluvial Mining Operations
Gold Concentrate Processing
Gold Mining
Gravity Beneficiation Plants
Heavy Mineral Recovery
Placer Gold Mining
Precious Metals
River Sand Gold Recovery
Small and Medium Gold Wash Plants
The process uses gravity separation to recover gold and associated heavy minerals from placer gold ore, with combined separation methods for further mineral recovery.
Gravity separation is an effective and economical method for placer gold recovery, helping reduce unnecessary processing cost.
The line can be configured with washing, screening, desliming, sluice separation, jigging, shaking table concentration, magnetic separation, and heavy mineral recovery systems.
The process can be customized according to gold particle size, mud content, gravel content, ore washing requirement, and final recovery method.
Raw sand gold ore enters the beneficiation process from the mine.
Large ore is crushed into smaller size for better liberation.
The material is initially classified to separate coarse and fine fractions.
Large gravel and boulders are separated from the ore stream.
Oversized gold-bearing stones are collected and discarded.
Fine ore sand moves forward to the roughing stage.
Primary concentration is carried out to recover gold-bearing rough concentrate.
Gold-bearing rough concentrate is obtained from the roughing stage.
Impurities are removed to improve the grade of the gold concentrate.
High-grade sand gold concentrate is obtained as the final product. Row 11
Medium-grade material is returned to the process or sent for special treatment.
Low-grade material from roughing is discharged as tailings for further classification.
Roughing tailings are further classified for secondary recovery.
Fine ore sand from secondary classification is treated to recover remaining gold.
Final waste material is discarded after secondary recovery, while rough concentrate may return for re-treatment.
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The file states that the gold recovery rate of two-stage sluice separation is about 70–74%.
Sluice roughing, jig scavenging, and shaking table cleaning can increase recovery to about 75–80%.
Screening can remove 20–40% waste stones such as gravel and pebbles, improving downstream separation efficiency.
Fine mud below 0.1 mm is usually removed because it contains little gold and interferes with mechanical separation.
Our experienced engineers can design a custom solution to increase your processing capacity and reduce operational costs
