| 摘要 |
Red mud is heated to form molten slag. Preferably molten iron is also formed. The slag may be formed into fibres by pouring off molten slag and contacting it with a horizontally directed mist jet. The iron may be cast into blocks or formed into powder. The iron may be converted into ferrosilicon. Silica sand and coke breeze are added to the red mud and this mixture is then dried before heating to form the molten slag. Apparatus for carrying out the above method comprises a chamber 12 for drying a mixture of red mud, silica sand and coke breeze, an electric furnace 14 for melting the dried mixture, a second furnace 40 for holding molten slag before its formation into fibres and a third furnace 44 for holding molten iron for formation into ferrosilicon. The exterior of the drying chamber 12 is heated using waste gas from the electric furnace 14. |
