| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.23 ( October 1990 ) R&D of High-Technology Research Laboratories, Commemorating the 20th Anniversary of the Technical Research Division ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Manufacturing Processes and Characteristics of KMFC Powder and KMFC Graphite Blocks Noriyoshi Fukuda, Katsuhiro Nagayama, Makoto Honma |
|
Synopsis : A process for producing a new carbon powder, Kawasaki Mesophase Fine Carbon (Brand name: KMFC), has been developed. The process consist of (1) heat-treatment of coal tar pitch for nucleating and growing mesophase spherules, (2) extraction of the heat-treated pitch by tar middle oil as a solvent, and filtration for separating the spherules from the pitch matrix, (3) calcination of the separated spherules, and (4) particle size classification of the calcined spherules. The produced KMFC powder has been proved to be made into isotropic graphite blocks having a high density of 1.90 g/cm3 and a high bending strength of 1000 kg/cm2 without using any extra binder. The applications of the graphite blocks have been increasing by expanding into such fields as electro-discharge machining electrodes, mechanical components, crucibles, and parts for nuclear reactors. |
| TextiPDF: 6p./296kbj |