METHOD FOR REMOVING FOREIGN MATTER FROM CEMENT SLURRY

• Main Authors: OKUBO YOSHIHARU, SAKAMOTO YASUSHI, AKIYAMA KATSUNORI, SUZUKI SHINICHI
• Format: Patent
• Language: English
• Published: 31.10.2000
• Edition: 7
• Subjects: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; PERFORMING OPERATIONS; PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER; SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; TRANSPORTING; WORKING CEMENT, CLAY, OR STONE

PROBLEM TO BE SOLVED: To smoothly remove even a foreign matter of low specific gravity and also enable applying of this method to a highly concentrated cement slurry by allowing passage of the cement slurry while a slit platelike filter with a specific weave aperture is vibrated between a mixing process and a sheet making process of a fiber-reinforced cement plate material. SOLUTION: A slitlike filter 2 with a slitlike opening 1 having 2-15 mm weave aperture is arranged between a mixing process and a sheet making process of a fiber-reinforced cement plate material. Further, a highly concentrated cement slurry is charged into and made to pass through the slitlike filter 2 while the filter 2 is vibrated by a vibrator 3. In this case, the weave aperture is defined as the opening width size of the slitlike opening 1 of the slitlike filter 2. Thus it is possible to remove a foreign matter depending upon its size and smoothly remove even the foreign matter of low specific gravity regardless of specific gravity. In addition, the filter 2 is not clogged even when the highly concentrated cement slurry is used during removal of the foreign matter.