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Method for preparing novel high-quality regenerated rubber

A high-quality recycled rubber technology, applied in mechanical material recycling, plastic recycling, recycling technology, etc., can solve the problems of difficult removal of iron dust, affect the quality of recycled rubber, and large equipment wear, so as to solve the problem of secondary pollution , small wear, good wear resistance effect

Inactive Publication Date: 2014-08-27
CHONGQING JUYI RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, since the iron wire is directly crushed into iron powder, on the one hand, it will cause great wear and tear on the equipment;

Method used

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  • Method for preparing novel high-quality regenerated rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation of embodiment 1 tread rubber powder

[0035] The method includes the steps of separating the waste tires into rings, cutting into strips, cutting into blocks and then crushing and magnetic separation. The separation of the rings, cutting into strips and cutting into blocks are all existing processes, and the size of the rubber after cutting into blocks is about 40mm*40mm.

[0036] The equipment used in crushing magnetic separation such as figure 1 Shown:

[0037] Mixture conveying belt 1, rubber granule discharge hopper 2, first full magnetic drum 3, driven drum 4, steel wire separation conveying belt 5, steel wire recovery conveying belt 6, steel wire discharge hopper 7, rubber particle conveying belt 8, rubber discharge hopper 9. Circulating conveyor belt 10, second full magnetic drum 11, baffle plate 12, rubber coarse crusher 13, first, vibrating screen 14, first conveyor belt 15, recycling conveyor belt 16, tread rubber powder grinder 17 , the seco...

Embodiment 2

[0048] The 30-32 mesh tread rubber powder obtained in Example 1 is used as a raw material, and is produced through chemical desulfurization, rubber mixing, and molding processes.

[0049] In the chemical desulfurization process, add tread rubber powder and additive formula: according to parts by weight, 1200 parts of tread rubber powder, 120 parts of vegetable oil asphalt, 4804 parts of reclaimed rubber desulfurization activator, 5 parts of sodium hydroxide, water 100 copies.

[0050] Put tread rubber powder, vegetable oil asphalt, activator, sodium hydroxide and water into the desulfurization tank, stir the materials continuously, and heat up to 280°C at the same time. When the pressure reaches 2.8MPa, the reaction time is about 2h, stop Heating, after standing for 5 minutes, exhaust and release the pressure to complete the desulfurization operation. After rough refining, scraping and refining in the rubber mixer, the product is formed by molding.

[0051] The obtained prod...

Embodiment 3

[0054] The 30-32 mesh tread rubber powder obtained in Example 1 is used as a raw material, and is produced through chemical desulfurization, rubber mixing, and molding processes.

[0055] In the chemical desulfurization process, add tread rubber powder and additive formula: according to parts by weight, 1800 parts of tread rubber powder, 180 parts of vegetable oil asphalt, 5106 parts of reclaimed rubber desulfurization activator, 15 parts of potassium hydroxide, water 350 copies.

[0056] Put tread rubber powder, vegetable oil asphalt, activator, potassium hydroxide and water into the desulfurization tank, stir the material continuously, and heat up to 270°C at the same time. When the pressure reaches 2.0MPa, the reaction time is about 2h, stop Heating, after standing still for 10 minutes, exhaust the pressure and release the material to complete the desulfurization operation. After rough refining, scraping and refining in the rubber mixer, the product is formed by molding. ...

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Abstract

The invention discloses a method for preparing novel high-quality regenerated rubber. The method comprises the steps of crushing and magnetic separation and chemical desulfurization, wherein the step of crushing and magnetic separation comprises the processes of crushing lumpy tires by a coarse crusher, sieving, so as to obtain coarse granules, carrying out first-time magnetic separation and second-time magnetic separation, so as to obtain pure coarse rubber granules and recovered steel wires, crushing the pure coarse rubber granules by a crushing machine, and then, sieving, thereby obtaining tread rubber powder; the step of chemical desulfurization comprises the processes of adding the tread rubber powder and auxiliaries, wherein a formula comprises the following ingredients in parts by weight: 1,200-2,000 parts of tread rubber powder, 120-200 parts of vegetable oil asphalt, 2-10 parts of activator, 5-20 parts of hydroxide and 100-400 parts of water. According to the method, iron wires can be effectively separated, so that the wear to equipment is reduced, and the quality of the prepared tread rubber powder is good; the existing softener is replaced with the vegetable oil asphalt, and meanwhile, hydroxide is added, so that the prepared product reaches the class-A recycled rubber standard of the national standard, is environmental-friendly and odorless and is not subjected to bluing.

Description

technical field [0001] The invention relates to a method for preparing regenerated rubber, in particular to a method for preparing novel high-quality regenerated rubber. Background technique [0002] At present, the process of using waste tires to produce tread rubber powder includes separating the waste tires from the bezel, cutting into strips and dicing, and then directly crushing the diced tires into 30-32 mesh fine powder, and then passing the fine powder through Iron chips and rubber powder are obtained by magnetic separation. In this way, since the iron wire is directly crushed into iron powder, on the one hand, the wear and tear on the equipment is great; on the other hand, the iron powder is not easy to be completely removed during magnetic separation, resulting in a large content of iron powder in the final product, which ultimately affects the quality of the regenerated rubber. [0003] Regenerated rubber is through physical desulfurization (i.e. decomposition, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L17/00C08J11/18C08J11/16C08J11/14B29B17/04
CPCY02W30/52Y02W30/62
Inventor 王文
Owner CHONGQING JUYI RUBBER PROD
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