Production of carbon black

Abstract From the Canadian patent

For producing carbon black material having a surface area of less than 5 m2/g, a dibutyl phthalate absorption of less than 30 m1/100g and density compressed to 1.5 - 1.7 g/cm3 and a specific electrical resistance of less than 0.1 ohmcm for use as an anode material for aluminum production, a method includes a first stage delivering feedstock through a feed tube to a plasma torch to a reaction are to raise the temperature of the feedstock to about 1600°C then, passing the dehydrogenated carbon material to a second stage to complete the decomposition to carbon black and hydrogen; adding additional raw material to cause quenching and reaction with formed carbon black to increase particle size …