MANUFACTURING METHOD OF POROUS CERAMIC FILTER FOR DUST COLLECTION

摘要

PURPOSE: A method of manufacturing a porous ceramic filter for dust collection is provided, which is characterized in that on the surface of a filter substrate having a porosity of 80% and an average pore size of 100-200 μm, a filtering layer having the porosity of 30% and an average pore size of 1-10 μm is coated so that it is possible to increase air-permeability while having improved filtering performance. CONSTITUTION: The method of porous ceramic filter for dust collection includes the steps of (S10) mixing 100 parts by weight of inorganic powder together with 20-35 parts by weight of distilled water and 3-8 parts by weight of viscosity controller; (S20) ball-milling above mixture so as to prepare a slurry having an average diameter of 5μm and a viscosity of 80 to 2000 cp; (S30) adding 0.15-1.50 parts by weight of a foaming agent in the slurry and then agitating the mixture at over 1200 rpm until the volume of slurry foam becomes quadruple in comparison with initial slurry volume; (S40) adding 1-3 parts by weight of a gelation agent such as aqueous epoxy resin in the foamy slurry, followed by slow agitation at 600 rpm; (S50) dry-forming of the gelled slurry in the form of filter; (S60) dipping the obtained filter in the slurry of 2nd step so as to form a coat thereon; and then (S70) calcining the coated filter in a furnace up to 1100 to 1600deg.C at a rate of 1-3deg.C/min.