​Construction Waste Sorting Equipment

With the acceleration of urbanization, the volume of construction waste generated is increasing day by day. To achieve rational resource utilization and environmental protection, construction waste sorting equipment plays a vital role. Let's take a detailed look at how it separates waste.

Firstly, screening is a common method. It uses sieves to sort materials based on particle size. Vibrating screens, driven by electric motors, create a tossing motion of construction waste on the sieve. Smaller particles pass through the sieve holes to become undersize products, such as recyclable fine aggregate; larger particles remain on the sieve surface and may require further processing, like large stones and concrete blocks.

Magnetic separation targets waste containing ferromagnetic materials. Permanent magnet drum separators and electromagnetic induction roll separators are commonly used. The permanent magnets inside the drum attract ferromagnetic materials, which adhere to the drum surface and then fall off and are collected under the action of gravity as the drum rotates. Electromagnetic induction roll separators attract ferromagnetic materials through an induced magnetic field generated by an alternating magnetic field. This method is mainly used to separate ferrous waste, such as waste nails and rebar ends.

Air separation relies on the density differences of materials to separate waste under the action of airflow. Lightweight materials, such as plastics, paper, and foam, are blown farther by the airflow; heavy materials, such as concrete and bricks, fall more quickly due to gravity and stay closer.

Flotation is mainly used for materials with different affinities for water. By altering the surface wettability of materials, combustible waste such as wood and plastics can attach to bubbles and float, while inorganic materials like concrete and bricks remain in the water or sink.

Optical sorting is based on the differences in reflection, absorption, and transmission of light by different materials. It uses optical sensors to detect the optical characteristics of material surfaces and separates target waste through a control system that operates the execution mechanism.

In summary, construction waste sorting equipment effectively separates waste from construction debris through various sorting methods, improving the recycling rate of resources and contributing to environmental protection.