High speed shearing grinder for modified bitumen

Abstract

The invention relates to a high speed shearing mill of modified pitch, comprising a high speed motor, a moving cutting ring, a static cutting ring and a pump shell; the moving cutting ring is connected with a connecting shaft of the high speed motor, the static cutting ring is arranged on the pump shell, and the pump shell has a feed port and an outlet port. The shearing mill is characterized in that: centrifugal self-absorption blades are also connected with the connecting shaft of the high speed motor, the peripheral of the centrifugal self-absorption blades is a static knife hole of the static cutting ring and the moving knife hole of the moving cutting ring in sequence. The self-absorption blades press the materials to the static knife hole, and the self-absorption blades and the moving cutting ring can also complete two shearing processes together with the static cutting ring. The invention can finely cut SBS (styrene-butadiene-styrene) according to the process and time that SBS is dissolved under high temperature pitch, which not only accelerates the dissolution process but also avoids large quantity of cutting heat and extreme stretching, thus reaching the target of energy conservation, yield increase, quality stability and investment saving.

Description

technical field [0001] The invention relates to a processing equipment for asphalt, an important material of roads. Background technique [0002] Along with the construction of China's road network, in the past ten years, the highways and fast lanes around the city in various provinces in China have been completed and opened to traffic at an average rate of 200 kilometers per year, making the annual consumption of asphalt, an important material for road construction in my country, exceed 3 million tons. At the same time, the country also attaches great importance to the quality and service life of the road surface. [0003] The existing mills for the production of modified asphalt are typically colloid mills with toothed discs at the shaft end, which cut the material when it enters the gap between the teeth. Meet the requirements. However, without self-priming ability, it needs to be equipped with an external input pump with the same flow rate to work. It will generate a lo...

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Problems solved by technology

[0004] In fact, the main production difficulty in the production of modified asphalt is how to uniformly disperse and dissolve SBS in the asphalt. melting effect, but the dissolution of SBS takes a certain amount of time. In other words, if a very fine colloid mill is used, it cannot be directly loaded into the car after grinding. Therefore, it is not necessary to grind SBS too finely in production. When asphalt When the temperature reaches 185°C, the SBS mixed in is already a softened rubber body at high temperature. Using a colloid mill with too fine a gap will generate a lot of cutting heat and extreme stretching for the softened rubber body, resulting in unstable product ductility index

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