镍铁渣多孔聚合微粒吸声材料研究及应用

Study and Application of Sound Absorption Properties of Porous Materials with Polymerized Particles Prepared by Waste Ni-Fe Slag

以工业固废镍铁渣为基本原料,通过添加胶凝溶剂,采用高温聚合成型工艺,制备出镍铁渣聚合微粒吸声材料,应用于吸声型声屏障中解决交通运输噪音污染问题。使用驻波管法和混响室法,对镍铁渣聚合微粒吸声材料的吸声性能进行测试。结果表明,制备的新型吸声材料具有高效的吸声性能,特别是对中低频吸声性能优于高频,降噪系数NRC可达0.68。而镍铁渣聚合微粒吸声材料的粒度配比、胶凝溶剂掺量、厚度和空腔等参数均影响其吸声性能,增加空腔深度可显著提升吸声材料的中低频吸声性能。该吸声材料适用于公路交通噪声污染防治。

To promote the recycling of Ni-Fe slag―a common industrial solid waste, a novel porous material with polymerized particles for sound-absorbing is prepared by using Ni-Fe slag as raw material, adding gelatinizing agent and using high temperature polymerization process. The novel material can be applied to sound-absorbing barriers to reduce traffic noise pollution. In this study, sound absorption properties of the novel material are tested by using the impedance tube method and the reverberation chamber method. Results show that the novel sound-absorbing material has high sound absorption effects. Especially for low and medium frequencies the sound absorption coefficient NRC can be up to 0.68,which is higher than that for high frequencies. The properties of the novel material are affected by the parameters such as particle size ratio, gelatinizing agent ratio, thickness and cavity size etc. Besides, the sound absorption properties of the sound-absorbing material at low frequency can be significantly improved by enhancing the cavity depth. The novel material can be applied to prevention and control of highway traffic noise pollution.