A waste asphalt mixture crusher and its crushing method

Abstract

A waste asphalt mixture crusher and its crushing method, the crusher includes a frame, a control device, a vibration screening device respectively arranged on the frame, a collecting device, a crushing device and a finished product conveying device, the crushing device includes A crushing bin with a feed inlet and a discharge port, a crushing roller arranged in the crushing bin, a driving motor for driving the crushing roller to rotate, and a jaw plate arranged on the crushing bin opposite to the crushing roller. The outer peripheral surface of the crushing roller is distributed There are several milling knives, and several milling slots for the milling knives are arranged on the opposite surface of the jaw plate and the crushing roller, and a gap is formed between the milling knives and the milling slots to accommodate the coarse aggregate in the coarse material, To prevent the crushing of the coarse aggregate from damaging the original gradation of the waste asphalt mixture, the invention performs crushing by means of alternate crushing, which can effectively improve the crushing efficiency and crushing effect.

Description

technical field [0001] The present invention relates to a crusher for waste asphalt mixture (abbreviated as RAP: recycledasphaltpavement) and a crushing method thereof. Background technique [0002] In recent years, in order to respond to the national requirements of "building a conservation-oriented society" and "developing a circular economy", coupled with the increase in the price of petroleum and stone resources, road departments in various places have taken active actions, with the aim of "sustainable development" With the goal of developing "green transportation", the recycling and reuse of old road asphalt materials has received more attention and attention. Many scientific research institutions and research institutions have begun to study and promote the recycling and reuse technology of old road asphalt materials. [0003] The crushing of waste asphalt mixture (hereinafter referred to as RAP) is an important step in the recycling process of old road asphalt materia...

AI Technical Summary

Problems solved by technology

Due to the high spindle speed of the impact crusher, the impact block and buffer plate will wear faster when used in RAP crushing. At the same time, it will also break stones and destroy the original gradation of RAP; the above crusher is crushed by extrusion or knocking However, RAP is made of viscous asphalt to bond stones of various specifications together. Extrusion or percussion has a limited effect on the viscosity of asphalt, so the degree of crushing is low and cannot meet the technical requirements for grading.

Images