Waste tires reuse "gold mines" to be excavated

Research and development of recycling waste tires in the EU has progressed. The research and development team used the synthetic gas extracted from the incineration of waste tires to produce solid carbon rods, and then used carbon to react with silicon oxide at high temperatures to produce silicon carbide, which is a ceramic and electronics industry. The basic material. In recent years, China has also begun to pay attention to the recycling of used tires and issued a number of related documents. However, compared with developed countries, the current level of comprehensive utilization of used tires in China is still relatively low.

New uses of waste tires

It is understood that the EU and its member countries produce an average of 3 million tons of waste tires each year, of which 70% of the waste tires eventually enter landfills. In order to develop new uses for waste tires and reduce environmental damage caused by waste tires, the EU's seventh R&D framework program supports 3.3 million euros. The European TyGRE R&D team is headed by scientists from the National Agency for New Technologies, Energy and Sustainable Development of Italy. Since the beginning of 2011, new methods for recycling recycled waste tire materials have been studied. Waste tires based on rubber materials are rich in highly flammable gaseous material elements that can be widely used as alternatives to burning coal or biomass as fuel. However, the necessary cleaning measures and their equipment must be used, resulting in excessive cost. If the volatile substances in the combustion process can be recovered, the catalytic materials used in the high value-added byproducts can effectively reduce the cost and cost of recycling the waste tires.

The R&D team succeeded in extracting volatile gases or “syngas” during the burning of waste tires. The synthesis gas is gasified to produce a solid carbon rod, and then carbon is used to produce silicon carbide at a high temperature, and the silicon carbide material is a basic material for the ceramic and electronic industries.

At present, the TyGRE R&D team has achieved all laboratory R&D targets for new uses of waste tires, and on the basis of the completion of the entire production process design, it is developing an industrialized first-phase pilot demonstration project that can process 30 kg of waste tires per hour. the study. Subsequently, the R&D team will conduct a comprehensive analysis and comparison of the data of the demonstration plant operation, and optimize the design of the second-phase normal engineering of the factory for large-scale production.

The market needs to be standardized

This research and development achievement undoubtedly provides a new direction for the reuse of used tires. According to reports, the major uses of used tires in China currently include old tire retreading, vulcanized rubber powder (for waterproof roll materials, tires and modified asphalt production), thermal decomposition (extraction of gas, fuel oil, carbon black, steel, etc.), recycled rubber, Local methods such as oil refining, but due to the interests of driving, this behavior still exists, causing pollution to the environment, but also affected the waste tire recycling market.

According to the China Rubber Industry Association's comprehensive report on the waste rubber comprehensive utilization section, China produced 283 million waste tires in 2012, with a weight of 10.18 million tons. China has become the world's largest producer of waste rubber (including waste tires). It is estimated that the amount of used tires in China will increase at a rate of 5% each year, and the amount of used tires in 2020 is expected to exceed 20 million tons.

At present, the highest recovery rate of used tires in the world is Finland. The recovery rate in the United States is more than 90%, Japan is close to 90%, and the recovery rate in China is about 50%. The gap between developed countries and developed countries is still very large. In order to increase the level of comprehensive utilization of used tires, the Ministry of Industry and Information Technology announced in January 2011 that the Guidelines for the Comprehensive Utilization of Waste Tires Propose to prohibit the use of waste tires for “refining oil by soil” to stabilize the development of recycled rubber products, and proposed to reach 120,000 tons of pyrolysis by 2015. , To cultivate about 10 well-known enterprises for comprehensive utilization of used tires. However, due to large investment, high recycling costs, and poor quality of recycled materials, it is difficult to popularize it.

In August 2012, the Ministry of Industry and Information Technology released “Admission Requirements for Tyre Refurbishment Industry” and “Entry Requirements for Waste Tire Comprehensive Utilization Industry”, the scale of production and operation of tire retreading and comprehensive utilization of waste tires, resource recycling and energy consumption, and processes and equipment. And environmental protection and other aspects. In order to implement these two regulations, the Ministry of Industry and Information Technology announced in April this year the "Provisional Measures for the Administration of Admission Notification of Waste Tire Comprehensive Utilization Industry", which will be formally implemented on May 1.

According to the analysis, the relevant departments of the state frequently issued documents in recent years. The development of the waste tire recycling and reuse industry indicates that the importance of the industry is increasing. With the implementation of these documents, the waste tire recycling and reuse market is expected to be standardized. The market structure will also change. Some backward enterprises that do not meet the conditions will be eliminated and the dominant enterprises will become more prominent. At present, among A-share listed companies, Tire Tire A and the soft-control stocks involve tire retreading. Shanghai Luren Eco-Economics Technology Co., Ltd., a major shareholder of Zhonglu Co., Ltd., specializes in waste tire recycling technology research and development and industrialization development, and masters waste products. Key Technology of Tire Micro-negative Thermal Cracking for Treating Used Tires.

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