Method for producing clean recycled soil and recycled aggregate by using construction waste

Abstract

The invention relates to a method for producing clean recycled soil and recycled aggregate by using construction waste. Soil separation comprises the steps that: under both the actions of a grating feeding machine and a No.1 vibration sieve, most of the soil in the construction waste is separated; rest of the soil is separated by using a No.2 vibration sieve; and final residual topsoil is separated by using a water concentrator. Steel bar separation comprises the steps that: most of long and short steel bars are sorted by using a No.1 strong-magnetic self-unloading de-ironing separator; long steel bar sorting is carried out under the assistance of a manual sorting station; and steel bar heads buried in the construction waste is subjected to an over-turning action of the No.2 vibration sieve, and are sorted out by using a No.2 strong-magnetic self-unloading de-ironing separator. Wood separation is carried out at the manual sorting station. According to the invention, multiple sorting means are adopted, intelligent cooperation of various devices is considered, and the process sequence is reasonably arranged. After repeated sorting of the impurities, the requirements for producing the clean recycled aggregate can be reached.

Description

technical field [0001] The invention relates to construction waste treatment and a method for producing clean regenerated soil and regenerated aggregate. Background technique [0002] It is well known that construction waste is an available renewable resource. More than 80-95% of construction waste is composed of soil, sand, gravel, bricks and concrete fragments, and these materials are the main components of recycling. Reclaimed soil can be used for urban greening, afforestation, etc. Reclaimed sand and recycled aggregate can be used to produce various concrete building materials, such as ready-mixed concrete, dry-mixed mortar, concrete components, various wall bricks, pavement bricks, etc. However, construction projects are a century-old project, and the industry has very high requirements for the quality of recycled aggregates, which far exceed the national standards, especially the requirements for the content of organic impurities, which have reached a very harsh level...

AI Technical Summary

Problems solved by technology

[0004] Learning the technology and experience of developed countries is a shortcut to solve China's construction waste disposal. There are great differences in the series, recycled product standards, and used occasions of recycled products, and there are also many differences in their treatment technologies. Therefore, the technologies of developed countries cannot be directly applied to China's construction waste treatment industry. We must follow the actual conditions of China's construction waste development of construction waste treatment technology with Chinese characteristics

[0005] At present, the biggest problem in the literature and materials of my country's construction waste treatment technology is that it simply follows the idea of ​​sand and gravel production technology. Most of the removal of organic impurities is ignored or unclear. Even if it is mentioned, it is too simple and crude. The combination of common problems is even more insufficient, and cannot guide the actual production