Porous material formula and method for high-performance metal fiber felt metal filter element

Abstract

The invention discloses a porous material formula of a high-performance metal fiber felt metal filter element and a preparation method of the porous material formula. The formula comprises 80%-90% of metal fibers (the wire diameter is 2-25 microns), 5%-10% of a binder, 3%-5% of an additive (the particle size is 0.1-1 micron) and 1%-2% of a lubricant, and the performance of the filter element is improved by optimizing the components and the proportion. The preparation method comprises the steps of fiber pretreatment, mixing forming, sintering and post-treatment, sintering is carried out in an inert or reducing atmosphere, the temperature is 1000-1200 DEG C, and heat preservation is carried out for 1-2 hours. The porosity of the prepared metal filter element reaches 80% or above, pore distribution is uniform, the filtering precision is high (smaller than or equal to 15 microns), and the metal filter element has excellent corrosion resistance and mechanical strength and can tolerate a high-temperature and high-corrosion environment. The filter element is suitable for meeting high-precision filtering requirements in the fields of petrochemical engineering, aerospace and the like, effectively solves the problems of uneven pores, poor corrosion resistance and the like of a traditional filter element, remarkably prolongs the service life, improves the filtering efficiency and has remarkable technical advantages and application value.

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