PRODUCTION METHOD OF HIGHLY SPHERICAL SHIRASU BALLOON AND SHIRASU BALLOON OBTAINED THEREBY

摘要

PROBLEM TO BE SOLVED: To provide a new production method capable of obtaining a shirasu balloon having the high sphericity and the high pressure resistance by one-time calcination even if using any shirasu raw ore recovered from nature.;SOLUTION: A residual part after a heavy ore component is removed from the shirasu raw ore, is supplied to an impact treatment in a high-speed air flow to be crushed, thereafter sieved so that an optional division of the particle diameter in the range of 20-150 μm is recovered, and calcined at 900-1,150°C.;COPYRIGHT: (C)2010,JPO&INPIT