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Novel process for reducing and regenerating waster rubber continuously

A new process, waste rubber technology, applied in recycling technology, plastic recycling and other directions, can solve problems such as high energy consumption and environmental pollution, and achieve the effect of improving production efficiency, wide application range and reducing heat energy consumption

Active Publication Date: 2012-06-20
HEBEI RICHWAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tank needs to be heated during the whole process, which consumes a lot of energy. During the discharge process, waste gas mixed with coal tar and rubber organic low molecules will be discharged at the same time, causing serious pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) High-speed plasticization: Pour 100 parts of 40-mesh adidas shoe rubber powder, 2 parts of RV rubber regeneration agent and 5 parts of softening oil into the mixing tank and heat and stir at a speed of 1000-2000 rpm. When the temperature rises to 90 Stop heating and continue stirring at ℃, put the material in the stirring tank into the cooling tank after 5 minutes, the stirring speed of the cooling tank is 10-50 rpm, cool to 30 ℃ and discharge;

[0029] (2) Mechanical grinding: the mixture is sheared and rolled into strips by a mechanochemical reactor (horizontal disc type mechanochemical reactor).

[0030] (3) Screw reduction: Pour the material from the mechanochemical reactor into the twin-screw extruder (φ65, speed 100-475 rpm) in the screw reduction unit, and the rubber regeneration agent is evenly wrapped under the action of mechanical shear On the surface of waste rubber powder particles, it penetrates into the rubber powder particles through infiltration, red...

Embodiment 2

[0034] (1) High-speed plasticization: Pour 100 parts of 60-mesh tire tread rubber powder, 3 parts of PTC-R rubber regenerating reducing agent and 5 parts of softening oil into the mixing tank and heat and stir at a speed of 1000-2000 rpm. When the temperature rises to 90°C, stop heating and continue stirring. After 5 minutes, put the material in the stirring tank into the cooling tank. The stirring speed of the cooling tank is 10-50 rpm, and the material is discharged when it is cooled to 30°C.

[0035] (2) Mechanical grinding: the output of step (1) is rolled into strips and granules through a horizontal grinding disc type mechanochemical reactor.

[0036] (3) Screw reduction: Pour the output from the mechanochemical reactor into the twin-screw extruder, and the rubber regeneration agent is evenly wrapped on the surface of the waste rubber powder particles under the action of shearing, and penetrates into the rubber powder particles through infiltration , reduce the S-S cross...

Embodiment 3

[0040] (1) High-speed plasticization: Pour 100 parts of 60-mesh tire rubber powder, 2 parts of diallyl disulfide and 5 parts of softening oil into the mixing tank and heat and stir at a speed of 1000-2000 rpm. When the temperature rises to 90°C, stop heating and continue stirring. After 5 minutes, put the material in the stirring tank into the cooling tank. The stirring speed of the cooling tank is 10-50 rpm, and the material is discharged when it is cooled to 30°C.

[0041] (2) Mechanical grinding: the output of step (1) is rolled into strips and granules through a horizontal grinding disc type mechanochemical reactor.

[0042] (3) Screw reduction: Pour the output from the mechanochemical reactor into the twin-screw extruder, and the rubber regeneration agent is evenly wrapped on the surface of the waste rubber powder particles under the action of shearing, and penetrates into the rubber powder particles through infiltration , reduce the S-S cross-linking bond energy without ...

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Abstract

The invention relates to a novel process for reducing and regenerating waster rubber continuously. The process comprises the following steps of: (1) plasticizing at high speed, namely feeding waste rubber powder, a rubber reclaiming agent and softening oil into an agitation tank of a high-speed plasticization reaction unit, and mixing; (2) performing mechanochemical reaction, namely shearing the rubber powder, and rolling to form stripped particles by using a mechanochemical device; (3) reducing the rubber by using a screw reduction unit, namely cutting S-S cross bonds of vulcanized rubber and hardly damaging C-C bonds at short time to keep a high physical property of the rubber by using a high-shearing screw combination; (4) kneading by using another screw reduction unit, namely performing secondary shearing, and cooling; and (5) refining, namely extruding by using an open mill to obtain regenerated rubber. The process has the advantages that: a high-temperature and high-pressure process is eliminated, so technical basis is provided for safety of a human body and equipment; waste gas and water is avoided in the process, so environmental protection is facilitated; few heat supply equipment is needed in the process, and energy resources are saved; and the production process is short, the regenerated rubber can be continuously and the like.

Description

technical field [0001] The invention relates to a new technology for continuous reduction and regeneration of waste rubber. technical background [0002] Rubber has long been used as a strategic material for economic and military production in the history of modern industrial development. It is the fourth largest industrial raw material alongside coal, steel, and petroleum. It is also a renewable raw material, and its importance in national economic and social development is not great. It goes without saying. my country has become the world's rubber processing base. Since 2002, my country has become the world's largest consumer country for seven consecutive years, and more than 65% of my country's rubber resources need to be imported from abroad. The full and rational use of rubber renewable resources has become an urgent practical problem to be solved. At present, the country has taken the recycling of waste rubber resources as an important part of the development of circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00
CPCY02W30/62
Inventor 马瑞刚张静郝彦忠
Owner HEBEI RICHWAY TECH
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