| 摘要 |
<p>Method for treating steelworks dust by inerting or recycling its waste and converting the recoverable zinc into high purity zinc oxide. The method comprises the stages of (1) dechlorinating the steelworks dust, (b) leaching the dechlorinated dusts, (c) separating out the ferric cations by precipitation, (d) neutralizing the Fe-free solution which is rich in Zn and separating out the insoluble fraction bearing Zn and non-ferrous cations, (e) dissolving the Zn precipitate by leaching in ammonia or ammoniacal carbonate, (f) precipitating the ammoniacal Zn complex by removing impurities and (h) washing, drying and roasting the Zn complex to obtain zinc oxide. This method can be used to make use of the wastes known as steelworks dust which are generated in the steel industry. <IMAGE></p> |
