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Chlorination of Chalcopyrite.

Yee DH; Olsen RS; Campbell TT
NTIS#: PB 267 742 :17 pages
Because of environmental concerns, the Bureau of Mines investigated an anhydrous chlorination process for the recovery of copper from chalcopyrite. Pelletized concentrate was reacted continuously with chlorine in a vertical shaft reactor at 550 deg to 750 deg c to extract copper-iron chlorides and elemental sulfur. The resulting molten metal chlorides drained from the reactor and collected in a receiver while sulfur distilled from the top and condensed in a separate unit. The tests were conducted in a 10-cm-diam reactor constructed to glass and in 15-cm-diam reactors constructed from various refractory materials. A high-alumina ramming mix exhibited the best resistance to molten metal chlorides and elemental sulfur in chlorine atmospheres. A reactor made with this high-alumina refractory was operated for 55 hr under actual chlorinating conditions without suffering any deterioration. Tests results show that more than 96 pct of the chalcopyrite was converted to copper- iron chlorides and elemental sulfur. Good separation of the metal chloride and sulfur products was achieved. After filtration, elemental sulfur of greater than 99 pct purity was obtained.
Publication Date
Document Type
IH; Report of Investigation;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
RI 8229
NIOSH Division
Source Name
NTIS#: PB 267 742
Page last reviewed: November 26, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division