METHOD AND APPARATUS FOR THERMALLY DECOMPOSING POLYMER WASTE, METHOD FOR COLLECTING CARBIDE, CARBIDE, RUBBER COMPOSITION CONTAINING THE CARBIDE, AND TIRE USING THE RUBBER COMPOSITION

摘要

Disclosed is a method for thermally decomposing polymer waste, wherein oxidation of carbides that remain after the thermal decomposition of the polymer waste can be suppressed. Specifically disclosed is a method for thermally decomposing polymer waste, which comprises: a step in which an oxygen-free gas is heated within a heat exchanger (1); and a step in which the heated oxygen-free gas is introduced into a thermal decomposition furnace (3) in which polymer waste (2) is contained, so that the polymer waste (2) and the oxygen-free gas are brought into direct contact with each other, thereby generating a thermal decomposition gas. The method for thermally decomposing polymer waste is characterized in that the gas flow rate of the oxygen-free gas to be introduced into the thermal decomposition furnace (3) is controlled within the range from 0.0015 m3/s [ntp] to 0.0095 m3/s [ntp].