Production process for reclaimed rubber

Abstract

The invention discloses a production process for reclaimed rubber, which is characterized in that the reclaimed rubber is prepared by adopting the following steps of: classifying various waste steel wire tires and processing, and after performing coarse crushing, intermediate crushing and fine crushing by utilizing a crushing machine, and filling crushed and sorted fine rubber powder into a devulcanizer; adding a rubber activating agent and a rubber softener which serve as auxiliary materials into the devulcanizer, and closing a charging opening; heating raw materials in the devulcanizer till the temperature is between 220 and 230 DEG C and the pressure is between 2.0 and 2.7 MPa, keeping the temperature and the pressure for 2 hours, performing desulfurization plasticizing, and opening a pressure relief valve to discharge gas in the devulcanizer; and after taking the desulfurized reclaimed rubber out of the devulcanizer, tableting by a refiner and an open mill in rubber pressing equipment to form reclaimed rubber products. The process can improve the production efficiency, obviously increase the tensile strength and break elongation and meet the high quality performance requirement of users.

Description

Technical field:

[0001] The invention belongs to the technical field of regenerated rubber production. Background technique:

[0002] At present, the production process of recycled rubber is as follows: firstly, various waste steel wire tires are sorted and processed, and after coarse crushing, medium crushing and fine crushing are carried out by a crusher, the rubber powder is loaded into the desulfurization tank; and then added into the desulfurization tank A certain amount of auxiliary materials such as activator, softener, etc., close the feeding port; use a heat source to heat the temperature of the raw materials in the desulfurization tank to 160 ° C ~ 180 ° C, and the pressure reaches 1.8 MPa ~ 2.0 MPa for 6 hours. After desulfurization, open the discharge port. The pressure valve discharges the gas in the desulfurization tank. Under normal circumstances, it takes about 6 and a half hours from loading the desulfurization tank (800kg rubber powder) to discharging the ...

Examples

Embodiment Construction

[0006] First of all, classify various waste steel wire tires, and use a cutter and a crusher to crush them into coarse, medium, and fine crushing. Select, put 800Kg of crushed and sorted fine rubber powder (80 mesh) into the desulfurization tank, and the desulfurization tank adopts 4.0Mpa-4m 3 High temperature dynamic desulfurization tank. Then, add a certain proportion of rubber activator and rubber softener auxiliary materials in the desulfurization tank, and close the feeding port. The rubber activator and rubber softener are products of Huaihe Rubber Auxiliary Factory in Bengbu City, Anhui Province. Use the heat source heated by the power supply to heat the temperature of the raw materials in the desulfurization tank to 225°C, and keep the pressure at 2.3MPa for 2 hours for desulfurization and plasticization. After desulfurization and plasticization, open the pressure relief valve to discharge the gas in the desulfurization tank. After the desulfurized recycled rubber pow...

Technical field:

[0001] The invention belongs to the technical field of regenerated rubber production. Background technique:

[0002] At present, the production process of recycled rubber is as follows: firstly, various waste steel wire tires are sorted and processed, and after coarse crushing, medium crushing and fine crushing are carried out by a crusher, the rubber powder is loaded into the desulfurization tank; and then added into the desulfurization tank A certain amount of auxiliary materials such as activator, softener, etc., close the feeding port; use a heat source to heat the temperature of the raw materials in the desulfurization tank to 160 ° C ~ 180 ° C, and the pressure reaches 1.8 MPa ~ 2.0 MPa for 6 hours. After desulfurization, open the discharge port. The pressure valve discharges the gas in the desulfurization tank. Under normal circumstances, it takes about 6 and a half hours from loading the desulfurization tank (800kg rubber powder) to discharging the ...

Examples

Embodiment Construction

[0006] First of all, classify various waste steel wire tires, and use a cutter and a crusher to crush them into coarse, medium, and fine crushing. Select, put 800Kg of crushed and sorted fine rubber powder (80 mesh) into the desulfurization tank, and the desulfurization tank adopts 4.0Mpa-4m 3 High temperature dynamic desulfurization tank. Then, add a certain proportion of rubber activator and rubber softener auxiliary materials in the desulfurization tank, and close the feeding port. The rubber activator and rubber softener are products of Huaihe Rubber Auxiliary Factory in Bengbu City, Anhui Province. Use the heat source heated by the power supply to heat the temperature of the raw materials in the desulfurization tank to 225°C, and keep the pressure at 2.3MPa for 2 hours for desulfurization and plasticization. After desulfurization and plasticization, open the pressure relief valve to discharge the gas in the desulfurization tank. After the desulfurized recycled rubber pow...