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Process for producing environmental-friendly and odorless regenerated rubber by using tread rubber powder prepared from waste/used tires

A technology of tread rubber powder and waste tires, which is applied in the field of regenerated rubber preparation, can solve the problems of short service life of elastic supports, and achieve the effects of prolonged service life, low wear and high efficiency

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

[0003] Secondly, at present, rubber particles are generally realized by vibrating screens during screening. Current vibrating screens, such as Chinese patents CN202061199U and CN202539070U, are mainly composed of a frame, a screening motor (or motor), a screen box and a screen mesh. The screen box is fixed on the top of the frame, and the two are connected by an elastic support, so there is a problem that after a period of use, the elastic support needs to be replaced, and the elastic support has a short service life

Method used

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  • Process for producing environmental-friendly and odorless regenerated rubber by using tread rubber powder prepared from waste/used tires
  • Process for producing environmental-friendly and odorless regenerated rubber by using tread rubber powder prepared from waste/used tires
  • Process for producing environmental-friendly and odorless regenerated rubber by using tread rubber powder prepared from waste/used tires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation of embodiment 1 tread rubber powder

[0045] 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.

[0046] The equipment used in crushing magnetic separation such as Figure 1-5 Shown:

[0047] 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 pulverizer 13, first vibrating screen 14, first conveyor belt 15, recovery conveyor belt 16, rubber powder pulverizer 17, the first...

Embodiment 2

[0063] 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.

[0064] 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, 10 parts of baking soda, 100 parts of water share.

[0065] Add tread rubber powder, vegetable oil asphalt, activator, baking soda and water into the desulfurization tank, stir the material 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.

[0066] The obtained produ...

Embodiment 3

[0069] 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.

[0070] 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, 6 parts of reclaimed rubber desulfurization activator, 25 parts of soda, 350 parts of water share.

[0071] Put tread rubber powder, vegetable oil asphalt, activator, soda and water into the desulfurization tank, stir the materials 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 and release the pressure to discharge the material to complete the desulfurization operation. After rough refining, scraping and refining in the rubber mixer, the product is formed by molding.

[0072] Th...

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Abstract

The invention discloses a process for producing environmental-friendly and odorless regenerated rubber by using tread rubber powder prepared from waste / used tires. The process 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 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, 10-40 parts of carbonate and 100-400 parts of water. According to the process, 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, carbonate 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 process for producing environmentally friendly odorless regenerated rubber from tread rubber powder obtained from waste tires. 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] Secondly, ...

Claims

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Application Information

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