微波氧化共沉淀法处理废酸液制备纳米铁氧化物

摘要

以电石渣作为中和剂和沉淀剂、利用微波辅助氧化共沉淀法处理了钢铁盐酸酸洗废液,获得了纳米四氧化三铁产品,其干基铁质量分数最高可达58％.研究了微波施加方式、微波辐射时间、微波辐射功率、合成初始pH、电石渣及其杂质的影响,确定了最佳工艺条件;用XRD、VSM和SEM等方法表征了四氧化三铁产品的结构与性能.微波辅助共沉淀法可以同时处理钢铁盐酸酸洗废液和电石渣这两种工业废弃物,使其中铁资源得到了高效回收.%A process of microwave-assisted oxidative co-precipitation method was established to synthesize Fe3O4 nanoparticles,in which steel pickling waste liquor was treated and used as raw materials and carbide slag as the neutralizing agent and precipitating agent.The iron content was up to 58％ calculated in dry base.The parameters,including microwave irradiation approaches,microwave radiation time,microwave radiation power,initial pH of synthesis,addition of carbide slag and impurities of carbide slag etc.,and optimization were studied in details.The as-prepared products were characterized by the analysis of X-ray diffraction (XRD),vibrating sample magnetometer (VSM) and scanning electron microscope (SEM) respectively.The results showed that the two industrial waste mentioned above were treated and iron resources were recovered efficiently.