| 摘要 |
<p>PURPOSE:To fix chlorine, etc., generated at the time of preheating as chloride and to reduce generation of organic chlorine compound itself by adding salt of at least one type of element selected from alkalis to scrap when the scrap is preheated by exhaust gas of an electric furnace. CONSTITUTION:Exhaust gas from an electric furnace 1 is guided to a burnings tower 2 to burn unburnt components. In this case, since the gas has a high temperature and large energy, it is partly passed through a plurality of scrap preheaters 3 to preheat shredder scraps of a waste vehicle. The gas is sucked to a main blower 7, guided to a plurality of spraying towers 8 and cooled. Then, the gas is passed through a bag dust collector 9 to remove dusts and condensed organic components. In this case, salt of at least one element selected from alkalis and alkaline earth elements is added in the preheater 3. Thus, chlorine, etc., generated when vinyl chloride in the scrap is thermally decomposed is fixed as chloride.</p> |
