EURO-ECO 2008 Hanover 18 - 20 November 2008	Environmental and Engineering Aspects for sustainable living
	European Academy of Natural Sciences, Hanover European Scientific Society, Hanover University of Bremen, Bremen

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Utilization of car tires is the important vital ecological problem in many countries. So due to the data of European Tyre Recycling Association the total weight of the worn car tires, which have not been reprocessed, measured up: 2.5 million tons in Europe; 2.8 million tons in USA; 1.0 million tons in Japan; 1.0 million tons in Russia in 2000 year.

The worn car tires are a source of long-range pollution of the environment. The tires dumped onto the ground, are decomposed in natural conditions during 100 years.

At the same time, car tires are a valuable raw material such as rubber, metal and textile cord.

The volume of reprocessing worn tires by the method of crushing does not exceed 10%. The most part of the collected tires (20 %) is used as fuel.

Burning car tires leads to the pollution of atmosphere by aerosols and emitted gases, containing sulfurous compounds, which appear at oxidizing sulfur, which is in rubber. Besides raw materials, including metal cord, are destroyed while burning car tires. On average the weight of metal cord in a lorry tire is 13-15 kg.

The essence of the offered method is at the first stage the car tire is frozen (-100°C – -150°C), therefore rubber loses elastic properties and passes into the area of brittle failure with an ultimate stress limit σusl≈9g107N/m². At the second stage the tire is processed with the pulse magnetic field. The destruction force appears as a result of interaction of eddy currents, induced in the metal cord of the car tire, with the pulse magnetic field. This force destroys the care tire. Then rubber crumbs are separated from the metal cord with the help of electromagnets.