▎ 摘　　要

NOVELTY - Laminated porous ceramic filtering material comprises first porous ceramic material layer, second porous ceramics layer, and third porous ceramic layer arranged in sequence. The porosity of first, second, third, fourth and fifth porous ceramics are sequentially reduced. The difference between aperture of fourth porous ceramic layer and aperture of fifth porous ceramic layer is less than or equal to 6 millimeter. USE - Laminated porous ceramic filtering material used for purifying high temperature coal gas (claimed), used in integrated coal gasification combined cycle power generation technology development and high temperature dust removing technology. ADVANTAGE - The laminated porous ceramic filtering material has good mechanical property; meets requirement of high-temperature gas purification process in whole coal gasification combined cycle field; and solves problem of dust bridge between ceramic filter elements. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing high temperature gas purifying laminated porous ceramic filtering material, which involves: (a) mixing first, second, third, fourth, and fifth porous ceramic material layer orderly; (b) placing corresponding mixed raw material in mold; (c) forming green unit; (d) sintering green unit in argon gas atmosphere to obtain laminated porous ceramic filtering material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of scanning electric mirror diagram of laminated porous ceramic filter material.