| 摘要 |
PURPOSE: A method for manufacturing ceramic filter is provided which is manufactured into a size required when mounting a high temperature high pressure ceramic filter on an air pollution preventing dust collector or a water treatment apparatus and controls size of pores of the ceramic filter according to application purposes. CONSTITUTION: The method for manufacturing ceramic filter comprises first process of preparing a slurry solution by mixing the mixture with 1 to 10 wt.% of an organic binder in a mixer for 3 or more hours after mixing 45 to 60 wt.% of clay, 40 to 55 wt.% of wooden powder, 1 to 5 wt.% of diatomite, and 40 to 150 wt.% of water; second process of coating a ceramic slurry solution on the non-woven fabric sheet so that the ceramic slurry solution is well rested on the non-woven fabric sheet by squeezing the non-woven fabric sheet containing the slurry solution for 2 to 3 times after dipping a non-woven fabric sheet having a size of 300 mm (L)x300 mm (W)x12 mm (H) into the slurry solution; third process of hot blast drying the coating molded material at a temperature of 30 to 90 deg.C for 3 hours or more; fourth process of charging the dried molded material into an electric furnace, ascending temperature of the electric furnace at a rate of 3 deg.C/min, slowly ascending temperature of the electric furnace at a rate of less than 1 deg.C/min from 200 to 450 deg.C, and finishing sintering of the molded material after maintaining the molded material in the temperature range of 900 to 1300 deg.C for 2 hours or more, wherein the sintering completed ceramic molded material, that is, a ceramic sheet filter is reduced about 10 to 30 wt.% in weight and contracted about 5 to 25% in length; fifth process of drying the slurry solution coated ceramic sheet filter after coating a slurry solution blended and mixed as in the first process on the surface of the ceramic sheet filter using a brush or a sprayer when high density of micropores and high collecting efficiency are required according to applications; and sixth process of performing second sintering on the dried ceramic sheet in an electric furnace as in the fourth process so that a ceramic sheet filter on inner and outer walls of which different sized pores are respectively formed is obtained.
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