Method for preparing porous-structure tire rubber powder by wet crushing

A wet crushing and multi-porous technology, which is applied in the field of tire rubber powder preparation, can solve the problems of affecting the service life of the hammer of the crusher, low production of fine rubber powder, and waste products, so as to reduce the difficulty of crushing and production costs , Shorten the swelling time and increase the production capacity

Pending Publication Date: 2020-10-02
安徽克林泰尔环保科技有限公司
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  • Application Information

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Problems solved by technology

[0003] At present, there are two technical methods for pollution-free crushing of waste rubber tires at home and abroad, namely: ① mechanical crushing at room temperature, and ② mechanical crushing at low temperature (about -120 ° C). The mechanical pulverization method will generate high heat in the process of grinding the rubber particles. As the rubber powder required to be ground becomes finer, the temperature generated by the friction between the grinding head and the highly elastic rubber particles will increase, and the rubber powder will often be

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  • Method for preparing porous-structure tire rubber powder by wet crushing

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[0027] Example 1

[0028] A method for preparing porous structure tire rubber powder by wet pulverization, specifically comprising the following steps:

[0029] (1) After cleaning and drying the waste tires, it is initially pulverized into particles of 30-50 mesh size, and then the waste tire blocks are placed in an organic solvent and swelled under normal temperature and pressure conditions for 12 hours;

[0030] Among them, the organic solvent is toluene, and its usage amount is 1.2 times the mass of waste tire blocks;

[0031] (2) Ultrasonic activation was carried out at 40-60°C for 8 hours, and after the ultrasonic treatment was stopped, the swelling was continued for 24 hours;

[0032] Among them, after the waste tire block undergoes swelling-activation-swelling treatment, the swollen tire block expands to 4-8 times;

[0033] (3) Using the liquid nitrogen cooling method, the swollen waste tire blocks are rapidly cooled in a short time, and the swollen tire blocks are fr...

Example Embodiment

[0037] Example 2

[0038] A method for preparing porous structure tire rubber powder by wet pulverization, specifically comprising the following steps:

[0039] (1) After cleaning and drying the waste tires, initially pulverize them into particles of 30-50 mesh size, then place the waste tire blocks in toluene, and the usage amount is 1.2 times the mass of the waste tire blocks. Under normal temperature and pressure conditions swelling for 12h;

[0040] (2) Ultrasonic activation was carried out at 40-60°C for 4 hours, and after the ultrasonic treatment was stopped, the swelling was continued for 24 hours;

[0041] (3) freezing the swollen tire block in a liquid nitrogen environment for 3-10s to obtain a pre-cooled tire block;

[0042] (4) Place the cold and brittle tire particles in the pulverizing equipment, and perform low-temperature fine pulverization treatment. While pulverizing, input compressed cold air into the pulverizing equipment to keep the internal temperature o...

Example Embodiment

[0045] Example 3

[0046] The waste tires are directly subjected to mechanical pulverization, and sieved to obtain tire rubber powder of 150-200 mesh.

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Abstract

The invention discloses a method for preparing porous-structure tire rubber powder by wet crushing. The method comprises the following steps that swelling treatment is carried out on waste tire blockssubjected to coarsely crushing by using an organic solvent at normal temperature, meanwhile, active treatment is carried out under the action of ultrasonic waves, then low-temperature crushing treatment is carried out on the waste tire blocks subjected to precooling to obtain the porous-structure tire rubber powder. The waste tire blocks are soaked and swelled in the organic solvent, small molecules of the solvent are diffused to gaps of rubber macromolecules, and a three-dimensional cross-linked network of the rubber macromolecules is gradually expanded, so that the glass transition temperature of the tire rubber is reduced, the waste tire particles can be converted into a brittle state in a short time, the crushing difficulty is reduced, and the production efficiency of fine rubber powder is improved; and after the solvent is volatilized, abundant pore structures are formed on the surface and inside the rubber powder, the specific surface area is large, and the performance of the rubber powder is improved.

Description

technical field [0001] The invention relates to the technical field of tire rubber powder preparation, in particular to a method for preparing porous structure tire rubber powder by wet pulverization. Background technique [0002] With the improvement of people's material living standards, more and more families or individuals buy cars, and the use of cars is increasing year by year. At the same time, the amount of scrapped cars is also increasing year by year, and corresponding waste tires are also produced in large quantities. The tires are mainly made of rubber. If the tires are directly discarded, on the one hand, the rubber material is difficult to degrade, which will cause great harm to the environment. On the other hand, the production of natural rubber is increasingly restricted by forest resources and cannot meet the development needs of the existing industry. Therefore, it is of great significance to do a good job of recycling waste tires. [0003] At present, the...

Claims

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Application Information

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IPC IPC(8): B29B17/04B29B17/00B29B13/10C08J11/02C08L19/00
CPCB29B17/0408B29B17/04B29B17/00B29B13/10C08J11/02C08J2389/00B29B2017/0416B29B2017/0015B29B2017/0476Y02W30/62Y02W30/52
Inventor 高玉斌
Owner 安徽克林泰尔环保科技有限公司
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