Pyrolysis plant for the recovery of carbon fibers made from carbon fiber-containing plastics, in particular from carbon fiber reinforced plastic, preferably of carbon fiber-containing and/or carbon fiber-reinforced composite materials, - with an elongated continuously operating pyrolysis furnace for continuous pyrolysis of CFRP material, - with an entry station for introducing the CFRP material to be processed into the pyrolysis furnace at one end, - with a discharge station for discharging recycled carbon fiber material from the pyrolysis furnace at the other end, - with a gas extraction device for the pyrolysis gas produced in the pyrolysis furnace, and - with a control device, in particular for the regulation at least of individual components of the gas in the pyrolysis furnace, in particular for regulating the oxygen content of the gas in the pyrolysis furnace, wherein the pyrolysis furnace is an indirectly heated rotary kiln comprising at least the following components: - an elongated rotary pipe forming the receptacle for the CFRP material to be processed and connected to the entry station and the discharge station, wherein the rotary pipe is provided at least over a part of its length with a mantle with outlet openings for discharging pyrolysis gas resulting from the pyrolysis, and - a housing at least partially surrounding the rotary pipe and insulated on the outside with passages for the entry station and possibly also for the discharge station and discharge lines, in particular for the pyrolysis gas, wherein a plurality of sections with different, or different from each other, controllable gas temperatures are provided in the housing along the length of the rotating pipe; characterized in that the outlet openings are provided in the rotary pipe at least in the section having the highest gas temperature; the pyrolysis furnace comprises several sections, namely at least a heating zone (19.1), a first pyrolysis zone (19.2), a second pyrolysis zone (19.3) and a cooling zone (19.4), while the composition of the gas and the temperature in the pyrolysis furnace in the various sections of the rotary pipe are differently regulated, namely with a defined proportion of oxygen G and with a defined temperature T in the first pyrolysis zone (19.2), and with a defined oxygen fraction G and with a defined temperature T in the second pyrolysis (19.3); and the pyrolysis plant further comprises a crushing device arranged in the process direction in front of or upstream of the entry station for crushing the CFRP material to be processed. - with an elongated continuously operating pyrolysis furnace for continuous pyrolysis of CFRP material, - with an entry station for introducing the CFRP material to be processed into the pyrolysis furnace at one end, - with a discharge station for discharging recycled carbon fiber material from the pyrolysis furnace at the other end, - with a gas extraction device for the pyrolysis gas produced in the pyrolysis furnace, and - with a control device, in particular for the regulation at least of individual components of the gas in the pyrolysis furnace, in particular for regulating the oxygen content of the gas in the pyrolysis furnace, - an elongated rotary pipe forming the receptacle for the CFRP material to be processed and connected to the entry station and the discharge station, wherein the rotary pipe is provided at least over a part of its length with a mantle with outlet openings for discharging pyrolysis gas resulting from the pyrolysis, and - a housing at least partially surrounding the rotary pipe and insulated on the outside with passages for the entry station and possibly also for the discharge station and discharge lines, in particular for the pyrolysis gas, wherein a plurality of sections with different, or different from each other, controllable gas temperatures are provided in the housing along the length of the rotating pipe;