The invention relates to a low-resistance-drop filtering material and a preparation method thereof, and belongs to the technical field of high temperature
flue gas, porous materials and high-flux filtering materials. The material is formed by compounding a
metal fibrofelt base material and a
metal powder film layer attached to the surface of the
metal fibrofelt base material; and the metal powderfilm layer comprises the following raw materials: a Fe-Al series
intermetallic compound and / or a NiCrAlFe
intermetallic compound. The preparation method of the material comprises the following steps:firstly, mixing the
intermetallic compound
powder with a glue solution, and fully stirring to obtain
metal powder suspension liquid; secondly, spraying the surface with high filtering precision of themetal fibrofelt base material with the
metal powder suspension liquid to obtain a sprayed material; and finally,
drying the sprayed material and then carrying out
sintering treatment to obtain the low-resistance-drop filtering material finally. By the material, the problems that flux is low, resistance drop is high, high
temperature resistance and
sulfur attack resistance are poor, and the structural mode is single are solved, the thickness of a spraying layer and the filtering precision are controllable, and the cost is low.