Domestic waste rubber tire utilization technology still has a lot of room to improve
Domestic waste rubber tire utilization technology still has a lot of room to improve
With the rapid development of China's automobile industry, more and more discarded tires and discarded rubber are used. How to make these waste to the lowest contamination, or in a more clean, more environmental protection, more modern industrial state display, turn waste into treasure, into resources, is a hot topic right now everyone is very concerned about.
China has become the world's largest rubber manufacturing and processing base, which is also the world's largest consumer of rubber. But it also produces the world's largest waste rubber products. In this state, the world is watching how China deals with the waste rubber, and it's something every business should consider. We can't throw our products into nature without responsibility and pollute the environment. Whether it is a tire enterprise or a circular economy enterprise, it is necessary to pay attention to the environment and focus on the progress of science and technology. Any pursuit of profit can no longer be sacrificed to the environment.
At present, some tire manufacturing enterprises has been considering the lifecycle of the product problems, some are also considering to establish recycling system, in a certain percentage of the formula in the recycling system of waste tire rubber powder or reclaimed rubber. However, there are still some problems that need to be solved.
Existing problems of desulfurization technology
Now, as scrap rubber products, the most massive ones are discarded tyres. Now a large number of domestic tire manufacturing using the technology of desulfurization technology imported from German, since 1989, this technology has been extended for decades, such as high energy consumption, heavy pollution and easy explosion safety hidden trouble, over the years is not a major breakthrough in connotation. Now both industry and companies are considering adopting a new generation of technology to solve the problem of the application of discarded tyres, thus changing the current situation of serious pollution in this industry.
In general, we have a comprehensive utilization of waste tires basic process, is to put it on, then put the inside of the skeleton and waste rubber, the simplest the most environmentally friendly way is made into powder. As a gelatine, this process only consumes a certain amount of mechanical energy, grinding it to grind fine, will not produce flue gas, waste water pollution. From environmental protection, this is one of the most energy-efficient and environmentally friendly applications. At present, these powders are not only returned to the tires, but also used in many fields such as asphalt, waterproof and selected materials, such as cement, etc.
One of the key techniques used in rubber powder is activation, which has become a focus of many scholars. Because if it is not activated, the rubber powder will have problems with the interface combination with some mixing rubber, which will affect the quality of the tire. Of course, there are some ways to improve the activation technology, which are being studied and studied by many scholars.
The production process of reclaimed rubber is backward
Besides, we have a lot of problems with the use of recycled rubber in our country. There was a time when recycled rubber, synthetic rubber, and natural rubber had 'three minutes'. This is because many rubber products companies are willing to adopt some of the cheap ones, which are considered to be cheap and processed materials. Last year, more than 3.8 million tons of recycled rubber was produced in China, which is actually a huge capacity.
The traditional processing technology of the recycled rubber, the ultimate aim is to destroy the original 3d network, so that the properties of vulcanized rubber are restored as part of the processing characteristics of the mixed rubber. At present, the domestic traditional heavy use is still a kind of dynamic desulphurization method, but now there are also some emerging methods, the use of constant pressure continuous regeneration method. However, this process because of the need to higher temperature, tend to produce a lot of smoke, coupled with the enterprise to use the device is open, the process of flue gas is very big, using temperature is relatively high.
Back in domestic tire industry, from the earliest cottage, to the mixing machine mixing, and then to use mixer mixing, due to the use of carbon black dust float in the sky, rubber industrial pollution, the enterprise always give a person the feeling of a very dark. Later, with the rubber molding machine, the production of enterprises became modernized, automated, the formula could be automatically weighed, and the production environment was greatly relieved. At the same time, enterprises are using advanced extruding machines, molding machines and so on, so that tire industry will enter the modernization of manufacturing ranks.
However, the production process of recycled rubber is completely different. Most enterprises still use low-end simple equipment, which is very backward and very polluting. In view of this background, we need an advanced supporting technology to promote the development of the industry.
The extraction of carbon black from old rubber is becoming more and more important
Now, some provinces of the so-called soil refining current situation is: hidden in some remote places, all day long risked smelled of smoke, and pollution of natural environment and some even buried in the ground, like underground kilns, gradually some outlet floating smoke. Due to the hidden nature, there is no pollution on the surface, but most of these gases enter the environment of nature and have not done any treatment.
Earlier, because oil was more expensive, the resulting inferior quality became an important channel for enterprises and people to make money. Every day there are cars to pull these poor oil, and can earn several thousand yuan a day. However, carbon black was not an important by-product when it was disposed of as waste.
Now, the carbon black produced by waste rubber has become a hot spot for many tire companies, because it can replace conventional carbon black in equal amount and has a very obvious price advantage. Some scholars believe that the carbon black is originally from the tire, and the return of the tire should be a very suitable choice. If you can do a good job of this product, do a good job of the solution, so that you have a tire, a tire, a little bit of a problem.
We replace the experiment carried out in some factory, have confirmed that this carbon black on many performance advantages, such as in terms of elongation and tensile strength has very good performance, in addition to the hardness has a certain decline. According to the manufacturer's evaluation, this carbon black can be used in a certain amount to replace the traditional carbon black
