[Waste Rubber Recycling Tyre Machine Progress in the recycling and utilization of waste rubber

There are two main methods for recycling waste rubber: mechanically crushing or grinding waste tires into particles, so-called rubber particles, and rubber powder; using desulfurization technology to destroy the chemical network structure of vulcanized rubber to make so-called recycled rubber.

 

There are two main methods for recycling old rubber: mechanically crushing or grinding waste tires into particles, so-called rubber particles, and rubber powder; using desulfurization technology to destroy the chemical network structure of vulcanized rubber to make so-called recycled rubber.

 

Rubber powder

Rubber powder was originally used to produce reclaimed rubber. Later, with the emergence of fine rubber powder (FRP), ultra-fine rubber powder (UFRP), and various modified rubber powders, the application field of rubber powder has been continuously expanded. At present, the global output of recycled rubber is 10% of the new rubber output. Rubber powder production is regarded as a new industry with high technology content, great market potential, and broad prospects.

 

Pre-processing of waste rubber. Waste rubber products generally contain non-rubber framework materials such as fibers and metals, and there are many types of rubber products. Therefore, the waste rubber must be pre-processed before crushing, including sorting, removal, cutting, and cleaning. The waste rubber should also be inspected and classified, and different types and sources of waste rubber and its products should be classified according to requirements. The most ideal is to adopt a recycling management cycle method and deal with it according to the source of waste rubber. For large-volume products such as waste tires, the bead must be removed, and a tread separator is also used to separate the tread from the carcass. Rubber shoes mainly recycle soles, while inner tubes need to remove valve nozzles.

 

Freeze crushing method. The basic principle of the cryogenic freezing pulverization method is: when high polymer materials such as rubber are below the glass transition temperature (Tg), they become brittle. At this time, they are easily crushed into powdery substances by mechanical action. Made by this principle.

 

There are two types of freezing crushing processes: one is the cryogenic freezing crushing process. The other is the combined use of low temperature and room temperature crushing technology. The former uses liquid nitrogen as the cooling medium. After cryogenically cooling the waste rubber, use a hammer mill or a roller mill for low-temperature crushing. The fine rubber powder production line adopts the latter method for production. Using liquid nitrogen cryogenic technology to process waste tires into fine rubber powder of 80 mesh or more, the temperature, speed, and overload during the production process are controlled by a closed-loop chain microcomputer, which does not pollute the environment. The whole production process of waste tire recycling production line adopts compressed air-powered feeders and closed pipeline transportation. The whole line is closed except when the waste tires are put in and the product is in contact with air during product packaging. In addition, since it is produced by the freezing method, there is no high-temperature odor, so no secondary pollution occurs. And through the heat exchange process of fine rubber powder and coarse powder, the purpose of making full use of energy and reducing energy consumption, that is, reducing product costs, is achieved.