FIELD: production of carbon fibers. SUBSTANCE: transported threads with liberating gaseous products of pyrolysis are isolated from direct effect of circulating oxidizing medium heated up to 230-280 C. In this case, pyrolysis gaseous products are withdrawn from oxidation zone to suction zone. Device for method realization has forechambers 1 with transporting rollers 2, branch pipes 6 and 7 for suction off of gaseous products and oxidation chamber 3 with means for heating and circulating of oxidizing medium. Chamber 3 has slot channels 10 for moving threads and localization of liberating gases. Each slot channel is formed by two flat plates which may be conjugated from one or both ends. EFFECT: higher efficiency. 10 cl, 3 dwg
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