转炉炼钢污泥处理技术与实践

介绍了对炼钢污泥处理系统中的加药间和压滤机的技术改造 ,改善了作业环境 ,减轻了工人劳动强度 ,并取得了一定的经济效益     

氧气顶吹炼钢尘泥湿式回转窑制粒法

用湿式回转窑工艺设备,在窑内相继对真空过滤机产生的尘泥(含水40％左右)进行初步干燥、造粒、烧结三个过程。经烧结的粒块粒径大于等于3mm的占92.4％。这种粒块返回炼钢工序作造渣剂,实现尘泥厂内消纳。产品生产燃料消耗为3.18×10~6kJ/t。     

Determination of zinc speciation in basic oxygen furnace flying dust by chemical extractions and X-ray spectroscopy

There is a growing concern regarding the environmental and public health risks associated with airborne particulate matter (PM). The basic oxygen furnace is one of the most important atmospheric dust sources of the steel manufacturing process. It emits dust enriched in heavy metal such as Zn, which is assumed to contribute to the toxic potential of atmospheric PM. Dust collected before and after the filtration system was analyzed to determine Zn speciation. To this end, a variety of analytical tools were used and a sequential extraction protocol has been specifically developed for iron and steel dust. The Zn speciation results obtained by EXAFS and sequential extraction were in excellent agreement. Before filtration, the speciation of Zn in BOF was 43% ZnFe₂O₄, 23% ZnCO₃ and 16% ZnO. The same species were detected after filtration with different proportions. BOF dust after filtration contains more soluble Zn phases which may play a role in the toxic effects of the emissions.     

新型混凝剂在转炉煤气洗涤废水中的应用

采用新型混凝剂氯化铝钙,配加一定量PAM,处理转炉煤气洗涤废水.研究了药剂加入量、pH值及搅拌条件对絮凝反应过程的影响,得出了最佳实验参数.结果表明,由于氯化铝钙在混凝过程中可提供一定量的Ca2 ,有利于破坏胶体的稳定性,降低ζ电位,压缩双电层,能提高悬浮颗粒的凝聚能力及改善处理后污泥的脱水效果.     

宝钢转炉烟气二次除尘技术研发与进步

随着现代炼钢技术的提高和转炉兑铁速度的加快,特别是在加入含有碳氢化合物杂质的低质废钢时,将产生大量的阵发性烟气并在炉口上方燃烧、引起烟气温度的急剧上升和体积膨胀,导致传统的转炉集尘罩二次烟气捕集能力下降,从而使环境状况不断恶劣。一种由宝钢集团BSEE研发的转炉烟气二次除尘综合处理技术能够消除这些问题。