Abstract
Although scrap tires can cause serious environmental problems, their use as an energy source in cement industry could save considerable amounts of money. The total generated scrap tires in Jordan is estimated to be 7,862,968 per year. The elemental analysis showed that 81% of waste tires was carbon and the average of the measured lower heating value was 33845 kj/kg. Jordan has seven cement factories that produce about 14.1 million tons of cement and consume about 987000 tons of crude oil which costs about 661 million dollars. The study analyzed the use of waste tires as supplementary fuel in cement industry in Jordan. Results showed that savings could reach 6.29 million dollars if we used 20% of the generated waste tires per year in cement industry and 31.43 if the whole generated waste tires (100%) was used in cement industry.
Highlights
Tires are made from different materials, basically from three raw materials: (1 ) Latex sourced from rubber trees planted in South East Asia, (2) Chemicals added to the rubber to provide strength and rigidity such as carbon black,sulphur, zinc, wax and antioxidants and (3) Steel, which first is coated to help it adhere to the rubber in the tire, forming 20% of the tires weight
Results showed that savings could reach 6.29 million dollars if we used 20% of the generated waste tires per year in cement industry and 31 .43 if the whole generated waste tires (100%) were used in cement industry
After usage, some used tires are replaced with new brand tires and those used tires are sold again in the market to be re -used by other users, which means that they would be used for another period of time until they turn into waste and become unsuitable and reach their end-of-life (EOL)
Summary
Tires are made from different materials , basically from three raw materials: (1 ) Latex sourced from rubber trees planted in South East Asia, (2) Chemicals added to the rubber to provide strength and rigidity such as carbon black,sulphur, zinc, wax and antioxidants and (3) Steel, which first is coated to help it adhere to the rubber in the tire, forming 20% of the tires weight. These three raw materials go through manufacturing process to produce the new brand tires put in the market.
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