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Waste rubber high-temperature normal-pressure regenerating process

A technology for waste rubber and waste rubber, which is applied in the field of high temperature and atmospheric pressure regeneration of waste rubber, can solve problems such as environmental pollution, waste gas generation, and concentration, and achieve the effects of reducing production processes, reducing production costs, and saving oil resources.

Active Publication Date: 2013-01-23
NANTONG HUILI RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some domestic reclaimed rubber manufacturers are still using the method of mixing ordinary rubber materials, so that the product quality cannot be improved
Due to the use of coal tar as a softener in the production process of reclaimed rubber, there is a strong stench in the production site, which has a great pollution to the environment
[0005] The existing high-temperature dynamic desulfurization process cannot meet the environmental protection requirements due to the waste gas generated during the production process
In addition, certain softeners and activators need to be added during the desulfurization process, so that the content of PAHS (polycyclic aromatic hydrocarbons) in the reclaimed rubber exceeds the standard, which cannot meet the requirements of EU environmental protection standards

Method used

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Comparison scheme
Effect test

Embodiment 1

[0060] First inspect the waste rubber. Present embodiment all adopts the waste and old all-steel radial tire more than 900 diameters, rejects small size tire and bias tire. Then the waste rubber after inspection is crushed and steel wire removed. Before crushing, use a high-power rubber breaker to cut the entire all-steel radial tire into pieces, and then use a rubbing structure crusher such as XKP450 to crush the steel wire and rubber in the waste tire. The fineness of the rubber powder is 20~ 30 mesh. Then use a magnetic separation device or other separation equipment to separate the steel wire in the crushed rubber powder. Then the crushed rubber powder is sent to the stirring device for stirring to prevent the rubber powder from sticking and agglomerating, and then directly sent to the twin-screw extruder through the rubber powder conveying device for rapid chain breaking reaction. The rapid chain breaking technology of the present invention is a continuous, airtight, s...

Embodiment 2

[0062] First inspect the waste rubber. This embodiment adopts general waste rubber, including waste rubber tires (excluding waste tires with steel wires), to remove foreign matter. Then the pulverizer of the waste rubber rubbing and cutting structure after the inspection is crushed, and the fineness of the rubber powder is 20 to 30 mesh. Then the pulverized rubber powder is sent to the stirring device for stirring to prevent the rubber powder from sticking and agglomerating, and then directly sent to the twin-screw extruder through the rubber powder conveying device for rapid chain breaking reaction. Similarly, this embodiment adopts the screw compression and shear chain breaking process under the condition of continuous, airtight and rubber powder flow, and the rubber powder delivered is pressed into the twin-screw extruder through the forced feeding device for uniform production. . In this embodiment, the rotational speed of the twin-screw extruder is selected as 60 rpm. ...

Embodiment 3

[0064] The method of present embodiment and embodiment two is first with waste rubber inspection. This embodiment adopts general waste rubber, including various waste rubber tires, to remove sundries. Then the pulverizer of the waste rubber rubbing and cutting structure after the inspection is crushed, and the fineness of the rubber powder is 20 to 30 mesh. Because the raw materials of this embodiment are all waste rubber, including all kinds of waste tires containing all-steel radial tires, before crushing, first use a high-power rubber breaker to cut the whole waste tires into pieces, and then use a rubbing structure shredder Crushing is carried out to separate the steel wire and rubber in waste tires. Then use a magnetic separation device or other separation equipment to separate the steel wire in the crushed rubber powder. Then the pulverized rubber powder is sent to the stirring device for stirring to prevent the rubber powder from sticking and agglomerating, and then d...

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Abstract

The invention discloses a waste rubber high-temperature normal-pressure regenerating process, which is characterized by comprising the following steps of: inspecting a waste rubber raw material; smashing the raw material; feeding smashed rubber power into a stirring device for stirring; feeding the stirred rubber powder into an extruding device for performing a rapid chain fracture reaction; feeding the extruded rubber material into a cooling device for cooling; rapidly shearing and rolling the cooled rubber material; kneading the rubber material powder into sheets; refining the sheet rubber material; and discharging the sheets and molding. Regeneration is performed rapidly at a high temperature under the normal pressure, so that a rubber linear molecular chain is not damaged, any catalyst or softening agent is not required to be added in a regenerating process, petroleum resources are saved, the rubber material quality is improved, environmental pollution is lowered, and the content of PAHS (Polycyclic Aromatic Hydrocarbons) in reclaimed rubber is less than 200 ppm. The tensile strength of a product can be over 16MPa, and the product performance is 1.5 times that of original high-quality tread rubber.

Description

technical field [0001] The invention relates to a production process of regenerated rubber, in particular to a waste rubber regeneration process under high temperature and normal pressure. Background technique [0002] Due to the shortage of international oil resources, the prices of various types of rubber are constantly rising. Therefore, rational use of renewable resources and reduction of production costs will be an inevitable choice. [0003] In the next few years, the shortage of rubber resources will continue to trouble countries all over the world. my country has also formulated a strategy for the development of circular economy, so the reuse of rubber resources is becoming more and more important. [0004] With the continuous improvement of international environmental protection awareness, it has been announced internationally that all reclaimed rubber with coal tar as a softener will be rejected for export. At present, in the process of recycling waste tires at ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L17/00C08J11/10B29B17/00
CPCY02W30/62
Inventor 倪雪文施兆丰周洪赵勇
Owner NANTONG HUILI RUBBER
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