Flake and high-crystalline graphite availbility - market economy countries. a minerals availability appraisal.
Fogg-CT; Boyle-EH Jr.
Denver, CO: U.S. Department of the Interior, Bureau of Mines, IC 9122, 1987 Jan; :1-40
The Bureau of Mines investigated the availability of flake and high- crystalline natural graphite from 4 domestic and 25 foreign mines and deposits in 11 market economy countries. Demonstrated resources were estimated to be 95 million metric tons (mmt) containing 5.61 Mmt of recoverable flake and high-crystalline graphite products. Fifty-five percent (3.17 Mmt) of the total recovered product is estimated to comprise plus 100-mesh (150-um) flake products and "lump" and "chip" high-crystalline products, designated as "graphite a" in this study; 45 pct (2.44 Mmt) of the total is minus 100-mesh (150-um) flake products and "dust" high-crystalline products, designated as "graphite b." Total production costs, including all costs needed over the life of each operation, were determined at a 0- and 15-pct discounted-cash-flow rate of return (dcfror) for both graphite a and graphite b products. For a 15-pct DCfror, 1.74 Mmt (54.9 pct) of the graphite a products is available at $600/mt or less and 2.13 Mmt (67.2 pct) is available for $800/mt or less. For the same DCfror, 1.08 Mmt (44.3 pct) of the graphite b is available at $200/mt or less, and 1.71 Mmt (70 pct) is available at $325/mt or less. No domestic resources were determined to be economic at present prices. A sensitivity analysis of the relative economics of the Alabama graphite deposits under various operational parameters is presented in an appendix. All evaluations are in January 1984 dollars.
IH; Information Circular
Denver, CO: U.S. Department of the Interior, Bureau of Mines, IC 9122