Preparation method of tread rubber powder

Abstract

The invention discloses a preparation method of tread rubber powder. Grinding and magnetic separation equipment comprises a mixture conveyor belt, a rubber particle discharge hopper, a first full magnetic roller, a driven roller, a steel wire separation conveyor belt, a steel wire recovery conveyor belt, a steel wire discharge hopper, a rubber particle conveyor belt, a rubber discharge hopper, a circulating conveyor belt, a second full magnetic roller, a baffle, a rubber coarse grinder, a first vibrating screen, a first conveyor belt, a recovery conveyor belt, a rubber powder grinder, a second conveyor belt, a second vibrating screen and an iron-containing rubber particle receiving hopper. A grinding and magnetic separation process comprises the following steps: grinding and screening a blocky tire via a coarse grinder to obtain coarse particles, obtaining pure coarse rubber particles and recovered steel wires through first magnetic separation and second magnetic separation and grinding the pure coarse rubber particles via the grinder and then screening the powder, thus obtaining the rubber powder. The preparation method has the beneficial effects that the iron wires can be effectively separated; wear of the equipment can be reduced; the service life of the equipment is long.

Description

technical field [0001] The invention relates to a preparation method of tread rubber powder. Background technique [0002] At present, the preparation method of tread rubber powder includes separating waste tires from the bezel, cutting into strips and dicing, and then directly crushing the diced tires into fine powders of 30-32 meshes, and then magnetically separating the fine powders to obtain Iron shavings and rubber powder. 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 completely remove during magnetic separation, resulting in a large content of iron powder in the final product, which affects the quality of the final regenerated rubber. [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...

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Problems solved by technology

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

[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

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