Waste concrete recycling and screening device

Abstract

The invention discloses a waste concrete recycling and screening device, which mainly comprises a first screening device, a second screening device and vibration devices, wherein the first screening device has a multi-layer rotary screen structure; the second screening device has a single-layer rotary screen structure; the first screening device and the second screening device are connected through conveying equipment; lower parts of the first and second screening devices are provided with the vibration devices; and the first and second screening devices can move vertically along the vibration devices to vibrate. A problem that meshes of the screening devices are blocked is solved and the screening efficiency is improved. A mixture of coarse aggregate (stones), fine aggregate (sand) and hardened mortar recycled from waste concrete is effectively screened, and the separated and screened stones and sand have performance similar to natural stones and sand and can be reutilized in newly mixed concrete; and sand in small grain size (less than 1.25mm) of the hardened mortar and powder in grain size of less than 0.16mm of the hardened mortar can be screened out totally to serve as a cement mixed material or an admixture of premixed concrete, so that waste resources are recycled.

Description

technical field [0001] The invention belongs to the technical field of recycling waste concrete, and mainly relates to a recycling and screening device for waste concrete. Background technique [0002] With the development of the economy and the advancement of urban construction, more and more concrete structures are demolished because they have reached the end of their service life or cannot meet the application requirements, resulting in a large amount of waste concrete. The traditional treatment methods for these waste concrete are mainly transported to the outskirts for open-air stacking or landfill, which will not only bring high treatment costs, but also cause a series of environmental problems. On the one hand, the environmental pollution caused by waste concrete is becoming more and more serious; on the other hand, the production of concrete requires a large amount of mineral materials (limestone, sand, etc.), and mine resources, as a non-renewable resource, need to ...

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Problems solved by technology

Effectively solve the problem of sieve clogging in ...

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