Tire Pyrolysis - Metso

Metso Tire Pyrolysis System background

• Metso recognized scrap tires as both an environmental problem and a waste of natural resources as oil, gas, carbon, and steel contained in the tire.
• Historical approach of burning tires in cement kilns, boilers, land filling and crumb rubber applications are an inefficient use and waste of natural resources.
• The main approach in the past was to get paid for the disposal of tires with secondary interest in the oil. Gas was sometimes burned in the tire process. The tire revenue could not sustain the plant cost in most cases.
• Uses of carbon product in secondary markets, asphalt extender, fuel and others did not significantly help the economics.  The ability to generate a carbon black product suitable for rubber use significantly improves the project economics.
• Metso developed our tire pyrolysis system to produce a high quality carbon product that could be used in rubber manufacturing and did not simply design our process as a tire disposal system. This requires that our process and plant design follow the same principles as the design of any chemical processing plant to provide consistent and safe operating conditions. The tire shreds feeding the system are treated as a process plant feedstock with a consistent feed rate to the system. The process is controlled with precision to insure that the temperature zones of the kiln stay within the set operating ranges. The carbon is cooled, has metals removed, is ground, and pelletized in consistent, controlled process stages.
• The plant has many stages but can be broken down into steps. A flow chart of steps that the tires must go through is shown to the side.
• Metso's pilot plant facilities were setup to evaluate the whole system on a continuous basis.  Over sixty (60) continuous pilot tests have been performed for a total of over 800 hours of continuous operation and over 32 tons of tires processed.
• Six (6) different feed materials have been tested at the pilot plant facility: passenger tires with steel, passenger tires without steel, off-road tires, manufacturer rejects, mixture of off-road and passenger tires and mixture of passenger and truck tires.
• Metso has been granted U.S. Patent No. 6,221,329 for “Pyrolysis Process of Reclaiming Desirable Materials from Vehicle Tires” as a result of our research and development of our tire pyrolysis process.
• Metso researched commercially available oil condensing systems and found them to be inadequate for consistently recovering oil from the difficult to handle pyrolysis process gas stream. As a result Metso developed our own condensing system and has been granted U.S. Patent No. 7,101,963 for “Condensing and Recovery of Oil from Pyrolysis Gas”.

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In many places used tires are seen as a problematic waste material difficult to get rid of. Biogreen® technology meets the demand of local processing of rubber from used tires and creating valuable products from the pyrolysis conversion.



Want more information on Pyrolysis Oil Distillation Plant? Feel free to contact us.

Once the tires have been shredded and separated from metals, the crumbed rubber can be processed in the Biogreen® pyrolysis process to generate high energy syngas, oil and char.

Recovered carbon black is a material obtained from solid product of tyre pyrolysis process. Treatment allow it to develop many useful properties that make reCB high added value product that can be considered a filler for the rubber industry, paints and coatings, ink production, and many other industrial applications.

Recycled carbon black produced in tire pyrolysis becomes increasingly popular, environmental friendly alternative to carbon black obtained from oil-based processes.