Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Method for smelting copper sulfide concentrate
A method of oxygen-smelting copper sulfide concentrate to obtain white metal, nearly white metal matte or blister copper by removing most of the Fe in the copper sulfide concentrate into the slag as well as removing part or most of the S therein as SO2 wherein oxygen-smelting is carried out to produce; slag in which a weight ratio of CaO to (SiO2+CaO) is 0.3 to 0.6 and a weight ratio of Fe to (FeOx+SiO2+CaO) is 0.2 to 0.5, and white metal, nearly white metal matte or blister copper, by adding SiO2 material and CaO material to the copper sulfide concentrate as flux.
Sumitomo Metal Mining Co., Ltd. Mitsubishi Materials Corporation
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Yoshiaki Nozomu Akira Yoichi
Mori Hasegawa Yazawa Takeda