Method for recycling, classifying and utilization of construction solid waste

Abstract

The invention provides a method for recycling, classifying and utilization of construction solid waste. The method includes the following steps that 1, a construction solid waste collection device collects construction solid waste, and then the construction solid waste is classified, screened, recycled and crushed; 2, a metal and non-metal screening device screens metal garbage and non-metal garbage, screening of wood garbage and solid concrete is manually performed, a wood crusher is used for crushing wood garbage to serve as other building auxiliary materials, and the selected solid concreteis then crushed by a crusher to obtain paving subgrade materials; 3, the paving subgrade materials are classified and screened through screening devices used for different sizes of solid concrete, and A-particle-size solid concrete and B-particle-size solid concrete are screened out for standby application; 4, the paving subgrade materials are prepared; 5, paving, repeated compaction and acceptance are performed in sequence. The components of the obtained paving subgrade materials are simple, the construction solid waste is used for recycling, crushing and reuse, the processing efficiency ishigh, the processing cost is low, the comprehensive utilization rate is high and the method is worth popularizing.

Description

technical field [0001] The invention belongs to the field of construction, in particular to a method for recycling, classifying and utilizing construction solid waste. Background technique [0002] Construction solid waste refers to the collective name of muck, waste concrete, waste masonry and other waste produced in the production activities of people engaged in demolition, construction, decoration and other construction industries. Classified by composition, construction solid waste can be divided into concrete blocks, crushed stones, brick and tile fragments, scrap metal (special iron metal), waste wood, etc. With the acceleration of industrialization and urbanization in our country, the construction industry is also developing rapidly at the same time, and the accompanying construction solid waste is increasing. The amount of construction solid waste in my country has accounted for one-third of the total urban waste. my country's 2 billion new construction area every y...

AI Technical Summary

Problems solved by technology

my country's 2 billion new construction area every year consumes 53% of the world's cement, 48% of iron ore, and 47% of coal. The amount of construction solid waste has accounted for 30%-40% of the total urban waste, but comprehensive Processing utilization is less than 4%

If it is not processed and utilized in time, it will definitely have adverse effects on society, the environment and resources

[0003] The current classification and treatment methods of construction solid waste have the following problems: (1) The efficiency of construction solid waste collection equipment is low, and construction solid waste is difficult to collect

(2) During the use of the metal and non-metal screening device, the metal adsorbed by the iron remover will accumulate at the bottom, and too much metal will affect the normal circulation of materials and the effect of attracting metals; in addition, it is difficult to ensure the smoothness of the materials on the conveyor belt , uneven materials will affect the screening effect of the iron remover on metals

(3) The jaw plate teeth of the jaw crusher are mostly slats set up and down. When crushing concrete blocks, it is easy to cause the concrete blocks to slide, the feed port to be returned or even blocked, which will affect the crushing work and cannot quickly crush the concrete. The block is crushed, and the crushing efficiency is low

(4) The wood waste crushing device is not completely crushed, the crushing efficiency is low, and the operation is not safe enough

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