INORGANIC PARTICLE, ITS MANUFACTURING METHOD AND PAPER USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method capable of reusing a paper sludge discharged from a paper mill as a coating pigment and a papermaking filler being a papermaking material and to provide a paper using them. SOLUTION: The manufacturing method of the inorganic particle is provided with a heat treatment process in which at least one part of calcium carbonate is decomposed to calcium oxide by heat treating the paper sludge by using the paper sludge containing the calcium carbonate as a raw material and an aluminium sulfate mixing process in which calcium trisulfoaluminate is formed by mixing a fired product obtained at the heat treatment process and an aluminium sulfate aqueous solution. COPYRIGHT: (C)2007,JPO&INPIT