Appeal No. 98-2735
Application No. 90004386
in accordance with the present embodiment includes a
smelting furnace 1 for melting and oxidizing copper
concentrates to produce a mixture of matte M and
slag S, a separating furnace 2 for separating the
matte M from the slag S, a converting furnace 3 for
oxidizing the matte M separated from the slag S to
produce blister copper . . . . The smelting
furnace 1, the separating furnace 2 and the
converting furnace 3 are arranged so as to have
different elevations in the descending order, and
melt launder means comprised of inclined launders 7A
and 7B defining fluid passageways for the melt are
provided so as to connect the above three furnaces
in series. Thus, the melt is tapped from the
smelting furnace 1 through the launder 7A to the
separating furnace 2 and from the separating furnace
2 throught the launder 7B down into the converting
furnace 3. Furthermore, in each of the smelting
furnace 1 and the converting furnace 3, a plurality
of lances 5 each composed of a double-pipe structure
are inserted through the furnace roof and secured
thereto for vertical movement, and the copper
concentrates, oxygen-enriched air, flux and so on
are supplied into each furnace through these lances
5. Furthermore, the separating furnace 2 is
composed of an electric furnace equipped with a
plurality of electrodes 6.
Thus, we interpret "blister copper producing means" as "a
smelting furnace having vertically movaeable double-pipe
structure lances, a separating furnace equipped with a
plurality of electrodes and a converting furnace having a
vertically moveable double-pipe structure lances, with each
furnace arranged in different elevations in decending order
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Last modified: November 3, 2007