Method for fine sorting and reuse of gravel asphalt waste

Abstract

The invention relates to a fine-separating and recycling method for a gravel pitch waste material. The method comprises the following steps: smashing the gravel pitch waste material to be uniform particles, and sieving out gravel powder and pitch powder, wherein the rest is the powder-free mixed particles; sending the gravel powder and the pitch powder into a floatation solution pool, and separating the gravel powder and the pitch powder; executing the multi-level classification separation to the powder-free mixed particles through an impact water flow classification separation device by using the buoyancy force of the floatation solution and the carrying ability of impact liquid flow; firstly, enabling the large gravel particles to sink in the bottom of liquid flow, and sinking in a gravel particle basket; enabling the gravel particles mixed with the pitch which has the small specific gravity to sink in the bottom of the liquid flow after continuously flowing, and sinking in a gravel pitch mixed particle basket; and enabling the pitch particles with the smallest specific gravity to successively sink in the bottom of the liquid flow after continuously flowing, sinking in a pitch particle basket, continuously separating and arranging, and recycling. The method is capable of classifying and separating the gravel pitch waste material, and arbitrarily regulating the mixing proportion of the former gravels and the former pitch.

Description

technical field [0001] The invention relates to a technology for sorting gravel asphalt waste, in particular to a method for finely sorting and reusing gravel asphalt waste. Background technique [0002] Gravel asphalt is widely used in roads, squares and various buildings, because of its service life has a certain number of years, especially in the northern region, where the temperature difference is large, low temperature freezing and heaving, coupled with overloaded vehicles, the ground gravel asphalt is easy to crack and age ﹑Package ﹑Stamping. In the repair or reconstruction of roads, squares, etc., the method of reusing the gravel and asphalt waste taken out is usually: [0003] 1﹑Crush directly to make foundation laying primer. This extensive method makes the foundation laid by the waste materials uneven, and it is easy to pack and muddy again. [0004] 2﹑Crush and then add hot-melt new materials to re-pave the road. Although this method has made progress, the rat...

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Problems solved by technology

[0009] An object of the present invention is to provide a method for finely sorting and reusing crushed stone asphalt waste, which is used to solve the problem that the current method of reusing crushed stone and asphalt waste cannot meet various mixing ratio designs asked questions

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