Patent ID: 6858175
Filing Date: 2005-02-22
Classification: C22B,F27B,F27D,F27M

Abstract:
1. A bottom structure of a suspension smelting furnace having a reaction space where a sulfidic raw material containing metal is smelted in the presence of an oxygen-bearing gas and slag-forming agent, to render the metal into a form that is advantageous for further treatment, and where created molten phases are settled onto a bottom of the smelting furnace to separate the molten phases from each other, when the temperature of the molten phases is within the range 1150-1450° C., the bottom structure comprising: at least one arched lining layer inclined in the longitudinal direction of the smelting furnace, a first arched lining layer having a first surface in contact with one or more of the molten phases, and a second surface opposite the first surface, the first arched lining layer being inclined in the longitudinal direction of the smelting furnace, forming the bottom structure thereof, and being made of a material having a thermal conductivity greater than 2 W/mK and a material porosity less than 20%, so that the temperature of the second surface is maintained below 800° C. in order to prevent a metallic phase, speise, having a low melting point, from penetrating through the lining layer.