C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
307/34, 53/347
C22B 4/00 (2006.01) C21B 3/06 (2006.01) C22B 4/08 (2006.01) C22B 7/04 (2006.01)
Patent
CA 1104835
ABSTRACT OF THE DISCLOSURE A method comprising the steps of supplying a carbonaceous reducer in a layer onto the surface of molten slag and feeding an oxygen-free gas into said slag in an amount and at a rate ensuring recirculation of said slag with its outflow onto the surface of said carbonaceous reducer layer and filtration therethrough. An electric furnace for carrying into effect said method, comprising a space defined by walls resting on a hearth and supporting a roof wherein are fixed electrodes devices for charging slag and a carbonaceous reducer into the furnace, and there are provided tuyeres adapted for supplying an oxygen- free gas into the slag, said tuyeres being spaced apart at a distance substantially equal to that of 3 to 6 electrode dia- meters, and at a distance of 1 to 3 electrode diameters from the furnace walls the bottom nozzle edges of said tuyeres being in space relationship with the horizontal axis of either a matte or metal tapping notches with a distance therebetween of 0.3 to 2 electrode diameters.
280643
Bochkarev Leonid M.
Egorova Tatyana S.
Gavrilenko Alexandr F.
Golovachev Anatoly I.
Lakernik Mark M.
Gosudarstvenny Nauchno-Issledovatelsky Institut Tsvetnykh Metall
Marks & Clerk
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