| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for producing lightweight hollow particles such as perlite with suppressed bulk density change. <P>SOLUTION: The method for producing lightweight hollow particles is characterized in that lightweight hollow particles are pneumatically transported through a pipe line having corner parts, and lightweight hollow particles are chosen using, as an index, a change in bulk density before and after pneumatic transportation by destruction of a part of lightweight hollow particles by collision with the corner parts of the pipe line. For example, lightweight hollow particles are pneumatically transported under an air pressure of 5-100 m/sec through a pipe line having 1-25 (n) corner parts whose angle (R) is 80-135°, within the range of 100≤n×V×(90/R)<SP POS="POST">2</SP>≤500, and lightweight hollow particles having a bulk density ratio (B/A) of≤2 or a bulk density difference (B-A) of≤0.2 g/cm<SP POS="POST">3</SP>are recovered, wherein A represents a bulk density before pneumatic transportation, and B represents a bulk density after pneumatic transportation. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
