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Energy recovery is possible due to the calorific value of the tyre (24–28 MJ/kg). Thanks to this property, used tyres can be used as an alternative fuel.
Kilns in the cement industry: the most developed application is the use of whole or shredded tyres as a substitute fuel for traditional fuels used in these kilns. This method represents a good way of recovering value from used tyres due to their technical characteristics: long combustion time in the kiln (temperatures can exceed 1450° C), low emissions released into the atmosphere, incorporation of ash and metallic products into clinker, full recovery of energy and tyre compounds.
Thermo-electric power plants producing electricity by partially or totally substituting traditional fuel with used tyres.
Steam-producing thermal boilers
Incineration units, as added fuel mixed with other waste.
Considering the above application, operators value the use of non-reusable used tyres due to their advantageous cost compared to traditional fuels.
Benefits of energy recovery
- Complete elimination of used tyre waste from the environment through full combustion
- The ash resulting from the combustion process in cement industry kilns becomes part of the clinker, which is the base product used in the production of various types of cement.