Efficient extraction of fine heavy minerals from alluvial and ground ores

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:248200

Tikhonov, O N ^[1]

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1. St. Petersburg Mining Inst. (Russian Federation)

A new extraction method which includes a combination of gravity and alternating electromagnetic fields with interfriction of mineral particles was proposed and tested in lab conditions at Mineral Processing Department of St. Petersburg Mining Institute. At the beginning of the work the main goal was to find an efficient alternative to traditional extraction methods (like shaking table, etc.) used for concentration of fine alluvial gold particles. After the method and a series of gradually improved lab separators were positively tested for gold, the efficiency of the method was also proved for extraction of platinum and other heavy minerals from alluvial and ground ores in experimental work at the St. Petersburg Mining institute. The fine heavy minerals were separated to concentrates with high technological indices. In parallel a semi-industrial gravi-electromagnetic separator was made and several technological flowsheets were designed for testing the method in industrial conditions. A series of industrial tests accompanied with complete sampling and standard technological measurements were performed at several alluvial deposits, with good technological indices. Thus the method and the flowsheets displayed high additional recovery of fine alluvial gold particles during elaborated industrial experiments in Siberia (Aldan province). At higher concentrate grade this method, even in one-stage operation, increased gold recovery more than by 25% compared with shaking table (for particles < 0.10 mm gold recovery was 82% vs. 55% by shaking table, for particles < 0.25 mm the recovery was 97.5% vs. 61.8%). Experiments were performed by joint team of St. Petersburg Mining institute and the Irkutsk Institute of Rare Metals.

• OSTI ID: 248200
• Report Number(s): CONF-9510120--; ISBN 0-87335-142-8
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CONCENTRATORS
EFFICIENCY
ELECTROMAGNETIC FIELDS
EXPERIMENTAL DATA
GOLD ORES
MATERIALS RECOVERY
ORE PROCESSING
PARTICLE SIZE
PERFORMANCE TESTING
SEPARATION EQUIPMENT