Waste tire tread regeneration method

Abstract

The invention discloses a waste tire tread regeneration method. The waste tire tread regeneration method comprises the following steps: preparing materials, wherein the formula comprises 100 parts of waste tire tread rubber particles of 15 to 20 meshes, 6 parts of environmentally-friendly operating oil, 2 parts of a regenerant, 2 parts of an efficient activating agent 580 and 2 parts of an aldehyde amine accelerant; mixing in a first stage: putting the materials in a tandem type internal mixer, and carrying out first-stage shearing and mixing, wherein the time lasts for 10 to 15 min, the temperature is 65 DEG C, and the rotating speed is 50 r / min; mixing in a second stage: directly discharging a sizing material mixed in the first stage into a downstream internal mixer, and carrying out second-stage shearing and kneading, wherein the time lasts for 10 to 15 min, the temperature is 55 to 80 DEG C, and the rotating speed is 60 r / min; refining: discharging a sizing material mixed in the second stage into a refining machine, refining for 10 min for film discharging, and preparing regenerative rubber. The method has the beneficial effects that low-temperature, continuous and high-quality regeneration of waste tire tread rubber is realized through a shearing mixing effect of a first-stage internal mixer rotor and a supplementary shearing and kneading effect of second-stage internal mixer rotor as well as refining forming of the refining machine, so that the problems that a traditional regeneration method is low in efficiency and high in labor intensity and pollutes the environment are solved.

Description

technical field

[0001] The invention relates to the technical field of regenerated rubber, in particular to a method for regenerating waste tread. Background technique

[0002] As the world's largest rubber consumer, my country's production of waste rubber is increasing day by day. As the main source of waste rubber, waste tires are expected to exceed 20 million tons in 2020. At the same time, my country's rubber resources are very scarce, and nearly half of the synthetic rubber and natural rubber depend on imports. Therefore, the recycling of waste rubber resources has important economic significance. my country's waste rubber is mainly used for the production of reclaimed rubber. At present, the dynamic desulfurization method is mainly used for regeneration. The dynamic desulfurization tank has high energy consumption, large floor area, low efficiency, and discharges a large amount of high-temperature exhaust gas during unloading, polluting the environment, and is facing b...