Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Reexamination Certificate
2011-06-07
2011-06-07
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
C075S640000
Reexamination Certificate
active
07955409
ABSTRACT:
A method of smelting copper includes: a generating step of generating blister and slag from copper matte by charging the copper matte into a smelting furnace and oxidizing the copper matte; a first refining step of refining another blister from the slag by reduction in an electrical furnace; and a charging step of charging the slag into one of the smelting furnace or another smelting furnace for treating copper concentrate and generating matte as repeating flux if copper grade of slag generated in the first refining step is higher than 0.8 weight %.
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Kojo et al., “Outokumpu Blister Smelting Processes, Clean Technology Standards”, Cu2007, The proceedings of the Carlos Diaz Symposium on Pyrometallurgy, vol. 3, Book 2, (Toronto, Canada, 2007), pp. 183-190.
Tuominen et al., “Slag Cleaning of Outokumpu Direct-to-Blister Flash Smelting Slags”, Cu2007, The proceedings of the Carlos Diaz Symposium on Pyrometallurgy, vol. 3, Book 2, (Toronto, Canada, 2007), pp. 339-350.
Japanese Office Action dated Aug. 3, 2010 issued in corresponding Japanese patent application No. 2008-227158 (with English translation).
Hamamoto Makoto
Nakakado Kenta
Watanabe Seiichi
Birch & Stewart Kolasch & Birch, LLP
McGuthry-Banks Tima M
Pan Pacific Copper Co., Ltd.
Wyszomierski George
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