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Mineral Beneficiation Studies and Economic Evaluations of Potential Copper-nickel Production from the Duluth Gabbro, Minnesota.

Authors
Lawyer-JE; Wiegel-RL; Schultz-NF
Source
NTIS: PB 255 020 Available for Reference At Bureau Libraries :212 pages
Link
NIOSHTIC No.
10008184
Abstract
This report describes operations, and estimated costs, to produce 150,000 metric tons per annum of white metal containing copper, nickel, silver, gold, and platinum metals from two hypothetical open pit mines operating on the Duluth Gabbro. The processing includes mining, crushing, grinding, beneficiation, and smelting. Based on $0.75 Per pound for copper and $2 per pound for nickel, the project would yield an after-tax discounted cash flow in excess of 15 percent. Uses for byproduct sulfuric acid and calcic feldspar are also proposed.
Publication Date
19750101
Document Type
CP; Final Contract Report;
Fiscal Year
1975
NTIS Accession No.
PB-255020
NTIS Price
A11
Identifying No.
OFR 83-76
NIOSH Division
WO;
Source Name
NTIS: PB 255 020 Available for Reference At Bureau Libraries
State
MN;
Performing Organization
University of Minnesota
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