| 摘要 |
<p>PURPOSE:To recover valuable metals from the steelmaking dust contg. zinc, iron, fluorine, chlorine, etc., and to more efficiently remove the fluorine and chlorine. CONSTITUTION:Sulfuric acid is added to the steelmaking dust, and the mixture is kneaded and then subjected to sulfating roasting. The waste sulfating roasting gas is washed with water, the washing water is neutralized to precipitate the fluorine compd., and the neutralized washing water is filtered to transfer the chlorine into the filtrate.</p> |
