Patent EA-004623-B1 (EA)
Title: Method and apparatus for feeding solid material and oxidizing gas into suspension smelting furnace
Inventor: SAARINEN RISTO
IPC: C22B13/02
Filed: 2001-12-11
Abstract: 1 An apparatus for feeding finely divided solids, containing at least sulphidic metal concentrate, and oxygenous oxidizing gas into a suspension smelting furnace, said apparatus comprising elements for conducting solids and oxidizing gas into the suspension smelting furnace, characterized in that in the feed orifice (7) of the suspension smelting furnace through which solids (2) and oxidizing gas (3) are fed into the reaction chamber (1) of the suspension smelting furnace, there is installed a suspension creation chamber (5,11) for a suspension containing solids (2) and oxidizing gas (3), in which chamber the solids (2) and at least part of the oxidizing gas (3) can be mixed to form a suspension before they flow into the reaction chamber (1) of the suspension smelting furnace. 2. An apparatus according to claim 1, characterized in that in the wall of the suspension creation chamber (5,11), there are installed nozzles (6) at varying distances from the feed orifice (7) of the reaction chamber of the suspension smelting furnace in order to conduct oxidizing gas into the suspension creation chamber (5,11). 3. An apparatus according to claim 1 or 2, characterized in that the nozzles (6) installed in the wall of the suspension creation chamber (5,11), at an essentially equal distance from the feed orifice (7) of the reaction chamber of the suspension smelting furnace, are installed at essentially equal distances from each other. 4. An apparatus according to any one of claims 1-3, characterized in that the nozzle angle of the nozzles (6) installed in the wall of the suspension creation chamber (5,11) with respect to the suspension flowing direction (8) is within the range 30 - 90 degree . 5. An apparatus according to any of the preceding claims, characterized in that the nozzle angle of the nozzles (6) installed in the wall of the suspension creation chamber (5,11) with respect to the suspension flowing direction (8) is dependent on the distance of the nozzles (6) from the feed orifice (7) of the reaction chamber of the suspension smelting furnace. 6. An apparatus according to claim 5, characterized in that the nozzle angle of the nozzles (6) installed in the wall of the suspension creation chamber (5,11) with respect to the suspension flowing direction (8) is smallest with nozzles located nearest to the feed orifice (7) of the reaction chamber of the suspension smelting furnace. 7. An apparatus according to any of the preceding claims, characterized in that the area in the suspension creation chamber (5,11) that is provided with nozzles (6) constitutes at least 80% of the total length of the wall of the suspension creation chamber (5,11). 8. An apparatus according to any of the preceding claims, characterized in that the area in the suspension creation chamber (5,11) that is provided with nozzles (6) constitutes at least 90% of the total length of the wall of the suspension creation chamber (5,11). 9. An apparatus according to any of the preceding claims, characterized in that the suspension creation chamber (5,11) is essentially circular in cross-section. 10. An apparatus according to any of the preceding claims, characterized in that the suspension creation chamber (5,11) is essentially annular in cross-section.