| 摘要 |
PURPOSE:To easily produce crude copper without forming a matte by refining a copper sulfide concentrate contg. Fe in a refining device having a high-temp. oxidizing zone and a reducing zone both of which are adjacent to each other or connected by a closed runner. CONSTITUTION:The copper sulfide concentrate of CuFeS2 such as chalcopyrite is refined in the device wherein the high-temp. oxidizing zone 3 and the reducing zone 5 are separated by a partition wall 9 or connected by the closed runner. The copper sulfide concentrate is firstly burned at 1,500-1,800 deg.C in the high- temp. oxidizing zone 3 by an oxidizing gas contg. 50-70% O2 to oxidize the S in the concentrate to SO2 which is then removed. The molten Cu contg. Fe formed at this time is transferred to the reducing zone 5 through the passage under the partition wall 9 or the closed runner, and weakly reduced therein to reduce the copper oxide in the slag to Cu which is then recovered. An O2- contg. gas is then blown into the copper to oxidize the contained Fe to Fe3O4 which is separated into the slag, then the O2 in the molten copper is reduced by CO, etc., and removed, and the crude copper for the anode of electrolytic copper is refined without forming a matte from the pyrite.
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