What are the uses of waste rubber recycling:
1, original and reformed utilization
2, direct combustion, recovery of heat energy
3, the use of high-temperature cracking technology, recovery of small molecules of chemicals
4, the use of physical and chemical regeneration technology, so that insoluble and non-fusible crosslinked rubber regained plasticity, and become elastomer materials that can be reprocessed and utilized.
5, the manufacture of rubber powder as a polymer alternative materials for rubber and plastic processing industry, construction industry, road traffic and so on.
A, the original use of tires and retreading the original use
1. Tire products, improve the retreading rate, and then for the retreading of the tire products used after the use of other types of recycling and reuse.
2. For non-tire products, also consider the issue of retreading, such as can not be retreaded and can not be retreaded again, other types of recycling and utilization;
3. In this way, you can make full use of rubber resources. But be sure to develop downstream reuse technology.
B. Direct combustion, recovery of thermal energy
Waste tires have a high calorific value, 1kg of waste tires is equivalent to 11kg of bituminous coal, but the waste tire combustion is incomplete to release toxic gases cause atmospheric pollution, must be equipped with environmental protection measures. It is a low value utilization method.
Incineration: can solve the problem of land occupation, but not fully utilize its value, but also bring serious air pollution! The United States, Japan, Western European countries, a number of cement plants, power plants, paper mills, iron and steel mills, etc. using waste tires as fuel, according to statistics, the use of heat waste tires accounted for the total amount of waste tires about 50%. This recycling method can not make the waste rubber products in the field of polymer materials recycling to play a role in the benefits, but ultimately also simply consume the valuable non-renewable resources.
China has not yet seen the industrialization of the report, if you want to establish the relevant enterprises must have a systematic environmental protection project, the investment is not small.
C. High-temperature cracking, recovery of small molecules of chemicals
The use of high-temperature cracking technology, the waste rubber cracked into small molecules of chemicals, such as fuel oil, carbon black, and can also be recycled a large number of steel wire and so on.
Problems: the current problems at home and abroad is the waste rubber cracking equipment cost is high, cracking products such as heavy oil separation and purification process is difficult to control, and at the same time to obtain the quality of the crude carbon black is poor, need to be further processed to improve the current effect is not obvious. China also has manufacturers (such as China's Zhejiang Lishui City Wanbao waste tire processing plant, Taipei Rongji Industrial Co., Ltd.) to implement, but the processing capacity is not large.
The road and transportation development of the big effort, prompting the tire industry big development. High speed, safety, high wear-resistant high-performance tires have become the mainstream of demand. According to statistics, the world's tire production in 2004 has reached 3 billion, and is still growing at a rate of several hundred million per year.
D. Waste rubber production of recycled rubber: the use of waste rubber production of recycled rubber is the traditional method of recycling waste rubber.