阐述了呼吸性粉尘的特点和危害，介绍了近年来国内外在呼吸性粉尘防治和控制方面的新技术，分 析了各种降尘技术的机理并进行了比较。结果表明：在钢铁企业呼吸性粉尘的净化研究中，采用添加湿润剂 的荷电水雾降尘技术是一种较好的治理方案。通过理论分析和试验研究，将该项技术应用于某钢铁企业的 呼吸性粉尘的净化中，取得了良好的降尘效果。

This article attempts to analyze the characteristics and hazards of the respirable dust, and introduces the new technologies for respirable dust prevention and control at home and aboard in recent years. Based on analyzing and comparing with different technologies of reducing dust, the results show that charged fog with wetting agent is a high- efficiency technology for the removal of the respirable dust of steel enterprise. Through the theoretical analysis and experimental study, it obtains ideal effect when this dedusting technology is applied to the removal of the respirable dust in a steel enterprise.