Tire Recycling Plant

TerniEnergia took the opportunity givne by the new regulatory framework,

which provides full traceability of the tire at the end of its life with a consequent reduction / cancellation of the phenomenon of dispersion. Taking advantage of the favorable location to intercept the flow of used tires, logistics with large space available to store the tires to be treated and possibility of extension of the site, the Company intends to win the national leadership of the sector to develop a chain of material recovery, involving also the verticalization process of the second raw material recovered for the production of manufactures goods.

The tire recycling plant of TerniEnergia, implements a process of crushing tires and represents a technological alternative to the traditional mechanical crushing process.

In a first phase of treatment, used tires are broken in pieces (chips, ie ciabattato) of size ranging between 50 mm and 100 mm. Through an intermediate tank and a system of adjustable power, the chips enters the heart of the system: the grinding of rubber. The chips of tires are ground in a press flat die with the principle of rotating rollers. Grinding takes place between the rollers and a circular plate with holes. The cutting forces, generated from the rolling of the rollers on the circular plate of the chain and the pressure forces (up to 120 bar), applied through a hydraulic system in automatic adjustment, grind the spare tire and separate the different components. Thanks to this method, limits of classic cuttings are exceeded. The process does not require the step of bead breaking in case of recycling of truck tire, because the presence of the ring does not interfere on the grinding process.

The press with a drive power of 2×160 kW may process input up to 4.5 t/h of chips of tires of a size of about 50-80 mm (truck) and of 100-150 mm (cars) to produce a granulate of 0.2-4 mm.

Results of Industrial Treatment

From the processing stage of the tires, the following result of separation is obtained:

  • Steel: 15-20%
  • Rubber granulate: 0-2 mm 30% 4.2 mm 15% 4.6 mm 15%
  • Textile rubber mixture 15-20%

Material Recovery

After the grinding, the steel wires and the composite rubber are separated by magnets. In a first separation of the fine particles are extracted and conducted to the cleaning of the granulate. The raw material and composite steel-rubber return to granulation phase.

After the granulation phase, the grinding product will be classified and cleaned thought a process including different stages.

The separation from metal parts takes place though a magnets drum and the classification though screens. The final classification for the separation of textiles and minerals takes place in the separator in a zig-zag separator and separating plates. Clean granules can be packed in bags or big-bags, or is stored in silos for bulk transport in tankers or containers.

Given the plant capacity of 2.5 t / h for each granulation press with a service of three rounds it is possible to reach a capacity of 15,000 t / on each line of recycled material.

The system acquired by TerniEnergia, equipped with innovative technologies, is the first installed in Italy of this type and has a capacity of 4 tons / hour and 22,500 tons / year. The plant operated initially on a daily shift of 8 hours, then moved on to reach 2 or 3 rounds. Installed inside an adapted industrial warehouse the plant covers an area of about 4,000 square meters, 900 square meters of which are roofed. The plant investment was approximately of Euro 3 million, excluding construction work. TerniEnergia has already signed supply agreements of used tires with national partners.

We can offer a very comprehensive rage of services and solutions in this filed is; main information are available on the dedicated website www.ternienergia.com or required by email info@ternienergia.com.