| 摘要 |
PURPOSE:To decrease the carbon content in fly ashes by separating and capturing the fly ashes from the gas formed by the combustion of coal, conducting the fly ashes to a slag tap type combustion furnace and burning the fly ashes by air enriched with oxygen in said furnace. CONSTITUTION:The fly ashes are separated and captured from the gas formed by the combustion of coal and are conducted to the slag tape type combustion furnace where the fly ashes are burned by the air enriched with oxygen to decrease the carbon content in the fly ashes. As a result, the burned ashes of the coal which cannot be made into fly ash cement because of the unburned carbon contained the permissible threshold or above and with which a discarding treatment is difficult are thoroughly burned out to substantially decrease the unburned carbon in the ashes. The fly ashes are thereby made usable as heavy aggregate for concrete, etc. The pulverized coal is made into the coarse grains at least equivalent to the grain sizes of sand or larger, by which the remedy and handling of dust are made easy and economy is improved. The high fuel ratio carbon is made utilizable for a coal firing boiler, etc., by such effects. |
