Waste and old tyre powder modified asphalt grinding machine

Abstract

The invention relates to a waste and old tyre powder modified asphalt grinding machine. The grinding machine comprises one of a cylinder stone roller bearing or a needle roller bearing or a radial thrust bearing, a mechanical pump shell (sleeve I and sleeve II), a spring, a retainer ring, a fan, a thrust rod, a rotating shaft, a round head guiding flat key and a silicon sealing ring, wherein a bearing inner race is connected to the rotating shaft of a high temperature electric motor, a bearing outer race is installed on the thrust rod, and the mechanical pump shell is provided with a feeding port and a discharging port. The grinding machine is characterized in that a centrifugal self-absorption blade is also connected with the rotating shaft of the high temperature electric motor, when the high temperature electric motor rotates, the self-absorption blade presses materials to a rolling element between the bearing inner race and the bearing outer race, meanwhile, and the bearing inner race of a connecting shaft of the high temperature electric motor also rotates at a high speed and drives the rolling element between the bearing inner race and the bearing outer race to rotate at a high speed, therefore the waste and old tyre powder in the high temperature asphalt flowing through the rolling element is continuously grinded and refined, and the aim of rapid dissolution is reached.

Description

technical field [0001] The invention relates to a processing equipment of building material---asphalt. Background technique [0002] With the rapid development of my country's highway construction, especially the economic stimulus policy adopted by the country after the financial crisis last year, a large amount of investment has poured into high-speed railways and expressways, making my country's expressways and expressways around the city open to traffic at an average rate of 2,000 kilometers per year. , an important building material for road construction - the annual use of asphalt exceeds 5 million tons, of which the use of modified asphalt is close to 3 million tons. [0003] In the existing production of modified asphalt, the additive basically uses petroleum products --- thermoplastic elastomer SBS. Its advantage is that the quality of SBS as an additive is stable, but it has two fatal weaknesses: [0004] 1. The melting temperature of general SBS is ≥180℃, while the...

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Problems solved by technology

Therefore, using SBS as an additive to produce modified asphalt requires extremely harsh production conditions;

[0005] 2. Using SBS as an additive to produce modified asphalt, the production cost is relatively high

[0008] 2. The market price of waste tire powder is about 2,000 yuan. According to the addition of 10%, the cost of each ton of modified asphalt produced is about 200 yuan higher than that of base asphalt.

[0012] In fact, the main production difficulty in the production of waste tire powder modified asphalt is how to uniformly disperse and dissolve waste tire powder in the asphalt. , has a certain fluxing effect, but it takes a certain amount of time to dissolve the waste tire powder. The tire powder is too finely ground. When the asphalt reaches 140°C, the waste tire powder mixed with it is already a softened rubber body at high temperature. Using a colloid mill with too small gaps for the softened rubber body will generate a lot of cutting heat and extreme tension. Stretching, resulting in unstable product elongation index

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