Disposal method for reusing highly-compound construction waste

Abstract

The invention relates to the field of construction waste disposal, in particular to a disposal method for reusing highly-compound construction waste. According to the technical scheme, the disposal method comprises the following steps: (1) heavy-duty sieve sorting; (2) heavy-duty crushing; (3) magnetic separation; (4) mechanical sieving; (5) secondary crushing; (6) magnetic separation; (7) flotation separation; (8) gravitational separation; (9) conventional brick making. By utilizing a process for combining heavy-duty hydraulic crushing with conventional crushing, sieving, magnetic separation and flotation separation, the method can clear out metal materials and low-density organic materials such as wood, plastic and pitch from the highly-compound stacked construction waste such as concrete, walls, ceramics, muck, steel bars, wood, pitch and plastics of dismantled buildings with different sources, types, ingredients, shapes and natures under the condition without manual sorting. The method has the advantages of being low in cost and wide in adaptability.

Description

technical field [0001] The invention relates to the field of construction waste treatment, in particular to a treatment method for reuse of highly compound construction waste. Background technique [0002] With the accelerated pace of urbanization in my country, the amount of construction waste generated is also increasing year by year. The total area of ​​existing buildings in my country is more than 40 billion square meters. Based on the standard of 500 to 600 tons of construction waste generated during the construction process of every 10,000 square meters, the construction waste in my country is at least 2 billion tons. It is estimated that by 2020, my country will also add new The additional construction area is about 30 billion square meters, and the newly generated construction waste will be an astronomical figure. [0003] Existing construction waste recycling technologies are all aimed at recycling specific types of construction waste, for example: use waste walls, ...

AI Technical Summary

Problems solved by technology

[0003] Existing construction waste recycling technologies are all aimed at recycling specific types of construction waste, for example: use waste walls, bricks and tiles and other construction waste to carry out crushing and screening processes, according to different shapes, sizes, etc. As aggregate of new concrete body, regenerated sand or used in the production of bricks and tiles; use waste concrete body to produce recycled cement or concrete body aggregate, etc.; use waste asphalt pavement to regenerate paving asphalt sand, etc.; the advantage of these technologies is recycling Its value is relatively high, but its shortcoming is that it cannot be applied to construction waste in my country, which basically has no classification. Construction waste includes concrete, walls, ceramics, glass, The current situation of highly compounded piles of construction waste such as dregs, steel bars, wood, asphalt sand, and plastics has seriously affected the recycling of construction waste in my country. The current recycling rate of construction waste is less than 5%. The recycling rates in the UK, Singapore, Hong Kong, Japan and other countries and regions are 48%, 63%, 80%, and 95% respectively

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