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Tin, Tantalum, and Niobium Recovery from Kougarok, Seward Peninsula, Alaska.

Johnson JL; McDonald WR
With an Appendix on Economic and Technical Evaluation by F Peters and T Philips :37 pages
The Bureau of Mines investigated recovery of concentrates containing tin, tantalum, and niobium from the Kougarok Deposit on the Seward Peninsula, AK. To date, 25 million lb of tin has been delineated in occurrences containing 0.36 to 1.32 pct sn, and the resource potential is estimated to be as high as 25 million st at average grades of 0.75 pct sn, 0.025 pct ta, and 0.025 pct Nb. Deslimed ore was concentrated to 54 pct sn, 0.3 pct ta, and 0.3 pct Nb, with recoveries of 74 pct sn and 44 pct ta-nb using a Humphreys Spiral followed by a deister shaking table. Tin values in the slimes were upgraded to a 5-pct-sn concentrate using a bartles-mozley separator followed by flotation. The 5-pct sn was further upgraded by fuming to give a concentrate containing approximately 60 pct sn. The recovery of the two products combined was 80 pct sn and 46 pct ta- Nb. A flowsheet with mill-design parameters resulted from the metallurgical testing. An economic analysis was made based on the proposed process.
Publication Date
Document Type
Fiscal Year
Identifying No.
OP 44-90
NIOSH Division
Source Name
With an Appendix on Economic and Technical Evaluation, by F. Peters and T. Philips
Page last reviewed: November 26, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division