Purified by silica particles and purification equipment and purification method of the silica particles

摘要

PROBLEM TO BE SOLVED: To provide a treatment method and a purifier capable of removing highly ionic impurities in a silica particle in a short time and having excellent purification effect and the purified silica particle.;SOLUTION: In the method for the purification of silica particles which comprises fluidizing silica particles and bringing the resulting fluidized silica particles into contact with a purifying gas at high temperature to remove impurities from the particles, the contact of the fluidized silica particles with a purifying gas is conducted in such a state that the fluidized silica particles are placed in a magnetic field and voltage produced by an electric field occurring by the movement of the silica particle is imparted to the silica particle. It is preferable to place the fluidized silica particle in ≥10 gauss magnetic field under ≥1,000°C.;COPYRIGHT: (C)2007,JPO&INPIT