Comprehensive recycling device and method for asphalt pavement resources

Abstract

The invention provides a comprehensive recycling device and method for asphalt pavement resources, and belongs to the technical field of aggregate and asphalt recycling. The system comprises a storagebin, an ore feeder, a crusher, a belt conveyor, a mill, wet-type screening equipment, a coarse-grained aggregate product conveying belt, a ball mill, coarse-fine grading equipment, a stirring barrel,solid-liquid separation equipment and flotation equipment; and asphalt concrete of an asphalt pavement is fed into the storage bin, the storage bin is connected with the ore feeder, the ore feeder feeds the asphalt concrete into the crusher, a crushed product is fed into the mill through the belt conveyor, obtained ore pulp is screened through the wet-type screening equipment, and an obtained screened material is fed into the ball mill for grinding and flotation. According to the device and the method, comprehensive recycling of coarse-grained aggregate, medium-grained aggregate, fine-grainedaggregate and asphalt concentrate of the asphalt pavement resources can be realized, and recycled asphalt is high in grade and excellent in aggregate performance; and the method is conveniently to realize engineering, water resource saving and environmental protection are realized through washing water closed circulation, and the method has good social, economic and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of aggregate and asphalt recovery, in particular to a comprehensive recovery device and method for asphalt pavement resources. Background technique [0002] As of 2019, the total mileage of China's pavement construction has reached 4.8465 million kilometers. With the development of my country's economy, the rapid increase in traffic volume, large-scale vehicles, and serious overloading have caused serious damage to asphalt pavement, and the pavement had to be repaired on a large scale. At present, my country widely adopts the maintenance method of digging out the old asphalt pavement and then paving the new asphalt pavement on the road surface, so a large amount of asphalt concrete is produced every year. Recycling and recycling the excavated old asphalt concrete can realize the recycling of resources, reduce the waste of resources, and solve the problem of environmental pollution. [0003] The key issue in...

AI Technical Summary

Problems solved by technology

At present, there are a large number of cracks inside the aggregate recovered by the pretreatment-grinding-screening method, the water absorption rate is high, and the crushing index value is high, resulting in poor performance of the aggregate. For asphalt, the rotary evaporator and the Abson method are mainly used at present. Recycling, the commonly used Abson method has a small amount of asphalt recovery, and the removal of impurities during the recovery process is not clean, which makes the asphalt secondary aging and affects the quality of the asphalt. The chemicals used in the recovery process are toxic and easy to remain and pollute the environment.

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