| 摘要 |
<p>A method of producing carbon fibers in which an exhaust gas generated in a heat-treating stage of the production of carbon fibers is divided into two portions, one portion thereof being decomposed by the action of an oxidizing catalyst and subsequently being blended with the other portion, to be re-used. According to said method, the heat loss in the exhaust gas disposal process can be substantially reduced and the efficiency of heat-treating can be improved and in consequence, various troubles due to the decomposed products contained in the heat-treating atmosphere such as surface damage, fuzziness and individual fiber breakage, etc. can be avoided.</p><p>Apparatus for performing the method may comprise a main circulating duct (9) leading from the gas discharge chamber (6) to the gas charge chamber (8) of a furnace (3). At a branch-off point (10) a sub-duct (12) leads via a heater (16), blower (17) and a gas decomposer (18) containing a catalyst to a confluence point (11), with a heater (14) and blower (15) being located in the duct (9) between the confluence point (11) and the gas charge chamber (8).</p> |
