To provide an oxygen-free copper wire restraining the lowering of an inductivity and having good surface quality, and a producing method and its producing apparatus which can produce large quantity of oxygen-free copper wires at a low cost.
In the producing method for continuously producing the oxygen- free copper wire 25 by supplying molten copper into a belt-caster type continuous caster D and rolling a cast copper material 23 introduced from the belt- caster type continuous caster D, a molten copper producing process for producing the molten copper by performing the combustion in a reducing atmosphere of a melting furnace A, a molten copper transporting process for transporting the molten copper fed from the melting furnace A into a tundish 5 by using a casting trough C sealable with a non-oxidizing atmosphere, a degassing process for performing a dehydrogenizing treatment to the molten copper passed through the casting trough C and a silver adding process for adding the silver into the molten copper performed with this dehydrogenizing treatment are contained.
HORI KAZUMASA
HATTORI YOSHIAKI
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