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Cost of Producing Copper from Chalcopyrite Concentrate as Related to So2 Emission Abatement--an Evaluation of Five Smelting Procedures.
Hayashi-M; Dolezal-H; Bilbrey-JH
NTIS: PB 237 838 :87 pages
Cost evaluations were made for five processes for producing 100,000 tons of electrorefined copper per year from a chalcopyrite concentrate. The processes were (1) conventional smelting with all furnace gases vented to the atmosphere; (2) conventional smelting with converter gases routed to an acid plant and reverberatory gases vented to the atmosphere; (3) conventional smelting with converter gases routed to an acid plant and reverberatory gases to a citrate system plant; (4) conventional smelting with all furnace gases routed to a citrate system plant; and (5) a modified smelting process in which the concentrate is roasted before being charged to the reverberatory furnace, with roaster and converter gases routed to an acid plant. The total fixed capital costs of the plants were estimated as (1) $56.7 million, (2) $77.4 million, (3) $87.2 million, (4) $73.9 million, and (5) $77.0 million, respectively. Total so2 removal from stack gases as sulfuric acid or sulfur for each process was (1) none, (2) 66 percent, (3) 99 percent, (4) 98 percent, and (5) 78 percent. Assuming no credit for byproduct sulfur or sulfuric acid, total operating costs per pound of electrorefined copper produced were estimated as (1) $0.081, (2) $0.103, (3) $0.119, (4) $0.111, and (5) $0.103, Respectively.
IH; Report of Investigations
NTIS Accession No.
NTIS: PB 237 838
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division