C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/280, 39/3
C22B 15/00 (2006.01) C22B 15/06 (2006.01)
Patent
CA 1159261
ABSTRACT OF THE DISCLOSURE The disclosure describes a method for the pyrometal- lurgical recovery of copper, more particularly from sulphidic ores and/or concentrates, in which ores and/or concentrates and additives are smelted to form a matte and a primary slag, and the matte is converted to blister copper and converter slag. According to this method, the smelting is carried out at a high oxygen potential, to form a matte and a slag both having relatively high copper contents. Then the primary slag and the converter slag are removed and the copper con- tained therein is recovered by reduction with reducing agents. An apparatus is also disclosed which comprises a smelting unit having a device for controlling a supply of solids to be smelt- ed, at least one burner, and a device for controlling a supply of fuel and oxygen to the burner. The apparatus also includes a settling hearth communicating with the smelting unit having openings for separately removing a lighter liquid phase and a gaseous phase, a converter for blowing copper matte into blister copper, having a device for supplying copper matte from the settling hearth, a device for supplying reaction- media, and openings for separately removing blister copper, converter slag, and waste gases from the converter. Finally, the apparatus comprises an after-treatment reactor for the slags, adapted for supplying primary and converter slags and reducing media to the reactor and openings for separately re- moving decopperized final slag and copper. In this way it is possible to modernize and increase the capacity of conventional or obsolete installations for a very low investment.
361563
Klockner-Humboldt-Deutz Aktiengesellschaft
Swabey Ogilvy Renault
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