PRODUCTION OF CARBON MATERIAL WITH MICROPORE

摘要

PURPOSE:To improve quality by pulverizing a crushed carbonaceous precursor with a jet mill in a closed circuit system until a specified average particle diameter and a specified average aspect ratio are attained. CONSTITUTION:A carbonaceous precursor made of aggregate such as coke kneaded with a binder such as pitch or raw coke obtd. by heat-treating heavy oil such as pitch is crushed to about several mm diameter. This crushed precursor is repeatedly pulverized with a jet mill and classified with a classifier by a closed circuit system to obtain fine powder having <=5mum average particle diameter and <=1.3 average aspect ratio and contg. <=1wt.% particles whose particle diameter is >15mum. This fine powder is molded into a prescribed shape by press molding or other method and the molded body is fired in a muffle furnace, etc., and graphitized at about >=2,000 deg.C to obtain a carbon material with micropores having <=1mum average pore size.