Method of recycling rubber powder of junked tires through activation

A technology for waste tires and waste tires, which is applied in the field of waste tire rubber powder activation and reuse, can solve the problems of performance degradation, low tensile strength and elongation at break, and low degree of activation of rubber powder. The effect of reducing and increasing activity

Active Publication Date: 2016-02-17
贵州华宇橡胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, prior art documents have conducted a large number of researches and publications on the above-mentioned technologies for the activation and reuse of rubber powder, but they all use a single or two methods to activate the rubber powder, so that the rubber powder is twice activated. It is low, and makes the quality of the activated rubber powder poor, especially after the prepared rubber powder is blended with natural rubber, its tensile strength only reaches 19MPa, the elongation at break reaches 640%, and the performance drops by 5%; And some researchers have studied the frequency of microwave radiation in microwave radiation, so that the relationship betwe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for activating and reusing waste tire rubber powder, comprising the following steps:

[0021] After cutting the waste tires into 10-mesh granules, mixing the granules with quicklime at a ratio of 1:1, spraying water accounting for 10% of the quicklime mass, and treating with microwave radiation for 10 seconds at a microwave frequency of 2450 Hz to obtain the mixed material; Mix the mixed material and asphalt according to the mass ratio of 1:0.01, add ammonia water accounting for 10% of the weight of quicklime, use ultrasonic treatment for 10 minutes, and then irradiate with ultraviolet light for 10 minutes, and add polyacrylamide at the same time, the amount of quicklime is 0.1% , and then mixed with a desulfurizer accounting for 3% of quicklime, sent to a grinder to grind into 80-mesh powder, and dried at 60°C to obtain activated rubber powder.

[0022] Described ammoniacal liquor, its concentration is 20%.

[0023] The frequency of the ultrasonic wave is 300...

Embodiment 2

[0027] A method for activating and reusing waste tire rubber powder, comprising the following steps:

[0028] After cutting the waste tires into 20-mesh granules, then mixing the granules with quicklime at a ratio of 1:1, spraying water accounting for 30% of the mass of quicklime, and using microwave radiation for 20s at a microwave frequency of 2450 Hz to obtain a mixed material; Mix the mixed material and asphalt according to the mass ratio of 1:0.05, add ammonia water accounting for 20% of the weight of quicklime, use ultrasonic treatment for 20 minutes, and then irradiate with ultraviolet light for 20 minutes, and add polyacrylamide at the same time, the amount of quicklime is 0.5% , mixed with a desulfurizer accounting for 7% of quicklime, sent to a grinder and ground into a 100-mesh powder, and dried at 110°C to obtain activated rubber powder.

[0029] Described ammoniacal liquor, its concentration is 70%.

[0030] The frequency of the ultrasonic wave is 3000Hz.

[003...

Embodiment 3

[0034] A method for activating and reusing waste tire rubber powder, comprising the following steps:

[0035] After cutting the waste tires into 15-mesh granules, mixing the granules with quicklime at a ratio of 1:1, spraying water accounting for 20% of the quicklime mass, and using microwave radiation for 15s at a microwave frequency of 2450 Hz to obtain the mixed material; Mix the mixed material and asphalt according to the mass ratio of 1:0.03, add ammonia water accounting for 15% of the weight of quicklime, use ultrasonic treatment for 15 minutes, and then irradiate with ultraviolet rays for 15 minutes, and add polyacrylamide at the same time, the amount of quicklime is 0.3% , and then mixed with a desulfurizer accounting for 5% of quicklime, sent to a grinder and ground into a 90-mesh powder, and dried at 90°C to obtain activated rubber powder.

[0036] Described ammoniacal liquor, its concentration is 50%.

[0037] The ultrasonic wave has a frequency of 1000Hz.

[0038...

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Abstract

The invention relates to the technical field of recycle of rubber powder of junked tires, in particular to a method of recycling the rubber powder of the junked tires through activation. Particles of the junked tires and quick lime are subjected to heat treatment under the action of water; microwave radiation is conducted to damage sulfur-sulfur bonds and sulfur-carbon bonds; in combination with bitumen, carbon-carbon bonds and carbon-oxygen bonds not subjected to microwave radiation are repaired; in combination with the ultrasonic effect in an environment where ammonium hydroxide exists, the rubber powder is pre-activated; in combination with ultraviolet irradiation and addition of polyacrylamide and a desulfurizing agent, in the grinding process through a grinding machine, the sulfur-sulfur bonds and the sulfur-carbon bonds are completely damaged, integrity of the carbon-carbon bonds and the carbon-oxygen bonds is protected, the sulfur content in the rubber powder is substantially lowered, the tensile strength of a rubber product prepared by mixing the rubber powder and natural rubber reaches 28-31 MPa, the tensile elongation at break is increased by 30% or above compared with that of a traditional product, and the performance of the rubber product is improved by 1-2.7% compared with that of natural rubber.

Description

technical field [0001] The invention relates to the technical field of tire rubber powder recycling, in particular to a method for activating and recycling waste tire rubber powder. Background technique [0002] With the rapid development of the automobile industry, the output of waste tires is also increasing year by year, which not only poses a serious threat to the environment, but also leads to a large amount of waste of resources; therefore, the recycling of waste tires is not only helpful It can alleviate environmental problems and realize the sustainable application and development of resources. [0003] After the rubber powder is directly blended with other rubbers, the performance of the prepared product drops sharply. The reason for this phenomenon is mainly caused by the poor interfacial bonding ability between the rubber powder and other molding polymers. Therefore, for the reuse of waste tire rubber powder, it is necessary to activate the rubber powder before r...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L33/26C08K3/22C08J11/20C08J11/26C08J11/10
CPCY02W30/62
Inventor 申建忠袁能汉
Owner 贵州华宇橡胶科技有限公司
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