F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
39/117, 53/351
F27D 3/00 (2006.01) C21B 13/12 (2006.01) C22B 1/00 (2006.01) F27D 13/00 (2006.01) F27D 17/00 (2006.01) F27D 99/00 (2010.01) F27B 3/26 (2006.01) F27B 15/00 (2006.01) F27D 7/06 (2006.01)
Patent
CA 1245462
ABSTRACT OF THE DISCLOSURE A method and apparatus are disclosed for preparing a feed mixture comprising several components in a single stage prior to feeding it into a smelting furnace. The preparation of the batch may include the preheating and drying of the material, the removal of crystal waters and evaporable substances as well as the conduction of the batch into the smelting furnace. According to the invention, a hot inert gas is conducted through a downwardly settling batch so that the gas is mixed into the batch as well as possible and even partial fluidization is prevented. The apparatus of the invention comprises a pretreatment silo which is uniform at the upper part but is divided into several sub-silos at the lower part. The sub-silos are connected at their bottoms to ducts along which the batch flows into the smelting furnace located below the pre- treatment silo. In between the sub-silos there is located a gas distribution chamber from which the gases are distri- buted through distribution ducts communicating with the sub-silos, the gases being discharged at the top of the silo. The employed gas is obtained by burning the exhaust gases from the smelting furnace and by combining them with cleaned circulation gases.
483691
Heikkila Risto M.
Hokkanen Pentti O.
Honkaniemi Matti E.
Jankkila Martti J.
Lilja Launo L.
G. Ronald Bell & Associates
Outokumpu Oy
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