Tin and silver recovery from Coal Creek, AK. Rept. of Investigations/1991

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5249749

Johnson, J L; Parker, T

The U.S. Bureau of Mines investigated the recovery of tin and silver from the Coal Creek deposit in Talkeetna Mountains, AK. Approximately 5 million st of reserves grading 0.2 pct Sn with silver credits of 0.2 tr oz/st have been delineated by drilling. A 10- to 25-pct-Sn gravity concentrate was produced by treating the minus 20-mesh ore with a spiral, then regrinding to minus 65 mesh and tabling. Sulfide contamination in the gravity concentrate was as high as 60 pct. Sulfide flotation of the concentrate produced tailings containing 40 to 50 pct Sn. Overall recovery was 76 pct for tin but only 5 to 10 pct for silver because of losses during sulfide flotation. Other methods tested to clean the concentrate included cassiterite flotation, gangue flotation, nitric acid leaching, and wet and dry magnetic separation. Tin beneficiation tests on the minus 325-mesh fraction included cassiterite flotation, vanning, sulfide flotation, and fuming. The bench-scale and locked-cycle tests were used to estimate the mass flows for a 1,000 st/d plant.

• Research Organization: Bureau of Mines, Salt Lake City, UT (United States). Salt Lake City Research Center
• OSTI ID: 5249749
• Report Number(s): PB-91-230326/XAB; BUMINES-RI--9356
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
010800* -- Coal
Lignite
& Peat-- Waste Management
ALASKA
BY-PRODUCTS
COAL DEPOSITS
COAL MINING
COAL PREPARATION
DEVELOPED COUNTRIES
DISSOLUTION
ELEMENTS
EXTRACTION
FEDERAL REGION X
FLOTATION
GEOLOGIC DEPOSITS
LEACHING
MANAGEMENT
MATERIALS RECOVERY
METALS
MINERAL RESOURCES
MINING
NORTH AMERICA
PROCESSING
QUANTITY RATIO
RECOVERY
RESOURCES
SEPARATION PROCESSES
SILVER
SOLID WASTES
TAILINGS
TIN
TRANSITION ELEMENTS
USA
WASTE MANAGEMENT
WASTE PROCESSING
WASTES