C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/280
C22B 15/06 (2006.01) C22B 15/00 (2006.01)
Patent
CA 1195125
Abstract of the Disclosure Copper sulfide ores are processed by a unique series of steps to produce blister copper, while attaining long sought advantages an initial smelting step is carried out in any desired manner, e.g. according to conventional practice, to produce a molten, copper sulfide matte or white metal. This matte or white metal is then solidified and subjected to a size-reduction step to produce solid particles capable of being injected into a converting vessel instream of oxygen, either pure oxygen or air significantly enriched with oxygen. With the matte of white metal injected in this manner, the converting reaction may be carried out on an autogenous basis, with continuous evolution of substantially undiluted S02 gas capable of being liquified for use in the production of elemental sulfur or sulfuric acid or for disposal so as to avoid atmospheric contamination. The usual fugitive gas emissions resulting from the handling and transporting of molten matte in conventional ways are almost completely avoided, and continuous optimized operation of the converting vessel is achieved independently of operation of the smelting step, making it possible to eliminate the often-resorted-to close coupling of smelting and converting furnaces and affording unusual freedom in plant layout.
404066
George David B.
Richards Kenneth J.
Gowling Lafleur Henderson Llp
Kennecott Corporation
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