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Method for producing regenerated rubber by utilizing waste and old tires

A technology for recycled rubber and waste tires, applied in recycling technology, mechanical material recycling, plastic recycling, etc., can solve the problems that iron powder is not easy to completely remove, affect the quality of recycled rubber, and equipment wear and tear, and solve the problem of secondary pollution. , small wear, good quality effect

Inactive Publication Date: 2014-08-20
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of tread rubber powder

[0029] It includes the steps of separating the scrap tires, cutting strips, cutting into pieces and then crushing and magnetic separation. The separation, cutting and cutting of the waste tires are all existing processes, and the size of the rubber after cutting is about 40mm*40mm.

[0030] Among them, the process of crushing and magnetic separation is:

[0031] (1) The block tire is crushed by a coarse crusher and then sieved by a vibrating screen to obtain coarse particles of 8-10 meshes, and the particles larger than 8-10 meshes are returned to the coarse crusher for crushing again. The coarse particles are subjected to the first magnetic separation to obtain steel wires and coarse rubber particles, and the steel wires are recovered. The first magnetic separation is to drag the mixed material into the full magnetic drum under the drag of the conveyor belt. Since the non-magnetic rubber particles are not affected by the...

Embodiment 2

[0035] Using the 30-32 mesh tread rubber powder prepared in Example 1 as a raw material, it is prepared through chemical desulfurization, rubber mixing, and molding processes.

[0036] In the chemical desulfurization process, the tread rubber powder and additives are added to the formula: in parts by weight, 1200 parts of tread rubber powder, 120 parts of vegetable oil asphalt, 4804 parts of reclaimed rubber desulfurization activator, and 100 parts of water.

[0037] Add the tread rubber powder, vegetable oil asphalt, activator and water into the desulfurization tank, stir the material continuously, and heat up to 280℃ at the same time. When the pressure reaches 2.8MPa, the reaction time is about 2h, stop heating and let stand After 5 minutes, the exhaust pressure is released and the material is discharged to complete the desulfurization operation. After roughing, scraping, refining, and then molding to obtain the product.

[0038] The appearance of the prepared product is sm...

Embodiment 3

[0041]Using the 30-32 mesh tread rubber powder prepared in Example 1 as a raw material, it is prepared through chemical desulfurization, rubber mixing, and molding processes.

[0042] In the chemical desulfurization process, the tread rubber powder and auxiliary agents are added to the formula: 1800 parts of tread rubber powder, 180 parts of vegetable oil asphalt, 5106 parts of reclaimed rubber desulfurization activator and 350 parts of water in parts by weight.

[0043] Add tread rubber powder, vegetable oil asphalt, activator and water into the desulfurization tank, stir the material continuously, and heat up to 270℃ at the same time, when the pressure reaches 2.0MPa, the reaction time is about 2h, stop heating, let stand After 10 minutes, the exhaust pressure is released and the material is discharged to complete the desulfurization operation. After roughing, scraping, refining, and then molding to obtain the product.

[0044] The appearance of the prepared product is smoo...

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Abstract

The invention discloses a method for producing regenerated rubber by utilizing waste and old tires. The method for producing the regenerated rubber by utilizing the waste and old tires comprises a smashing and magnetic separation step and a chemical desulfurization step, wherein a process of smashing and magnetic separation comprises the following steps: smashing and sieving block-shaped tires by virtue of a coarse crusher to obtain coarse particles; carrying out primary magnetic separation on the coarse particles to obtain steel wires and coarse rubber particles; carrying out secondary magnetic separation on the coarse rubber particles to obtain pure coarse rubber particles; and smashing the pure coarse rubber particles by virtue of a pulverizer and then sieving to obtain tire tread rubber powder; in a process of chemical desulfurization, 1200-2000 parts by weight of tire tread rubber powder, 120-200 parts by weight of plant oil asphalt, 2-10 parts by weight of activating agent and 100-400 parts by weight of water are added according to a formula of the tire tread rubber powder and auxiliaries. The method for producing the regenerated rubber by utilizing the waste and old tires has the advantages that iron wires can be effectively separated, abrasion to equipment is reduced, and the obtained tire tread rubber powder has good quality; the plant oil asphalt is adopted for replacing the existing softening agent, so that the obtained rubber product can reach the national standard of A-grade regenerated rubber, is environment-friendly and odourless and is not blue.

Description

technical field [0001] The invention relates to a method for preparing regenerated rubber, in particular to a method for making regenerated rubber by using waste tires. Background technique [0002] At present, the process of using waste tires to produce tread rubber powder includes separating the waste tires from rims, cutting into strips and dicing, and then directly pulverizing the diced tires into 30-32 mesh fine powder, and then passing the fine powder through Magnetic separation to get iron chips and rubber powder. In this way, since the iron wire is directly pulverized into iron powder, on the one hand, the wear and tear of the equipment is large. [0003] Recycled rubber is to destroy the macromolecular network cross-linked structure in rubber products into single chain through physical desulfurization (ie decomposition, pulverization) and chemical desulfurization (softening and activation under high temperature and high pressure) of waste rubber products such as ti...

Claims

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Application Information

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IPC IPC(8): C08L17/00C08J11/10B29B17/04
CPCY02W30/52Y02W30/62
Inventor 王文
Owner CHONGQING JUYI RUBBER PROD