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›› 2014, Vol. 14 ›› Issue (6): 979-983.

• 过程与工艺 • 上一篇    下一篇

钢铁冶金烧结机头电除尘灰中氯化钾的回收

张梅 付志刚 吴滨 吕娜 曾乐林 杨运泉   

  1. 湘潭大学化工学院 湘潭大学化工学院 湘潭大学化工学院 湘潭大学化工学院 湘潭大学化工学院 湘潭大学化工学院
  • 收稿日期:2014-10-20 修回日期:1900-01-01 出版日期:2014-12-20 发布日期:2014-12-20
  • 通讯作者: 张梅

Recovery of Potassium Chloride from Sintering EAF Dust

ZHANG Mei FU Zhi-gang WU Bin LV Na ZENG Le-lin YANG Yun-quan   

  1. School of Chemical Engineering, Xiangtan University School of Chemical Engineering, Xiangtan University School of Chemical Engineering, Xiangtan University School of Chemical Engineering, Xiangtan University School of Chemical Engineering, Xiangtan University School of Chemical Engineering, Xiangtan University
  • Received:2014-10-20 Revised:1900-01-01 Online:2014-12-20 Published:2014-12-20
  • Contact: ZHANG Mei

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被引次数

8

摘要： 以某钢铁企业烧结机头含钾电除尘灰为原料，在分析其理化性质的基础上，提出了水洗脱钾?固液分离?除杂与脱色?固液分离?真空蒸发?冷却结晶的氯化钾回收新工艺. 通过实验研究，确定了获得高质量KCl产品的水洗脱钾液最佳蒸发体积浓缩比. 在溶液初始沸腾温度120℃、末沸腾温度160℃的范围内，以50~60 r/min转速进行真空旋转蒸发，经结晶冷却所得KCl产品含量和回收率分别达97.24%和65.25%，产品粒度分布较集中均匀，外观质量较好，达到国家标准GB6549-2011中工农业用KCl产品I类一等品要求.

关键词: 含钾电除尘灰, 氯化钾, 蒸发, 结晶, 回收

Abstract: Taking the sintering dust with potassium resource from iron and steel metallurgical process as raw material, a new recovery process of potassium from the dust was proposed, which included water leaching, solid-liquid separation, purification, decolorization, solid-liquid separation, vacuum evaporation and cooling crystallization. By experiment, the optimum evaporation concentration ratio was obtained, under which the high-quality potassium chloride product could be acquired. At the beginning and ending boiling temperatures of 120 and 160℃, respectively, the rotational speed of 50~60 r/min and evaporating concentration ratio of 10.71, the content and recovery yield of potassium chloride from the dust reached 97.24% and 65.25%, respectively. The product could meet the first-class index requirements of GB6549-2011 and its particle size distribution was rather concentrated and homogeneous.

Key words: sintering EAF dust containing potassium, potassium chloride, evaporation, crystallization, recovery

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