Crushing production line device and crushing method for processing waste concrete recycled aggregates

Abstract

The invention discloses a crushing production line device for processing waste concrete recycled aggregates. The crushing production line device successively comprises a three-level crushing machine,a pre-crushing disc assembly, a centrifugal crushing blanking apparatus and a pin-roll lamination crushing apparatus according to the sequence of a technological process; the three-level crushing machine is used for crushing the concrete blocks with no iron impurities and non-iron impurities for three times, the pre-crushing disc assembly is used for centrifugally pre-crushing agglomerates and blocks in the crushed particles, and the centrifugal crushing blanking apparatus is used for secondarily crushing the pre-crushed particles and intermittently blanking the secondarily crushed particles;and the pin-roll lamination crushing apparatus is used for vertically extruding the secondarily crushed particles and also rolling crushing the particles. The crushing production line device of the invention has the advantages that the raw material can be crushed in various manners, the equipment integration degree is high, the raw material can be thoroughly crushed, the crushing efficiency is high, the smashing effect is good, the aggregate recycling rate of the recycled concrete is improved, the smashing effect is good, and the aggregate recycling rate of the recycled concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to crushing production line equipment for processing waste concrete recycled aggregates and a crushing method thereof. Background technique [0002] With the development of social economy, the process of urban-rural integration, and the expansion of urban scale, hundreds of millions of tons of waste concrete are produced every year due to demolition, reconstruction, maintenance and repair. If waste concrete is directly stacked or landfilled, it will not only cost a lot of freight, but also cause secondary pollution to the environment. If the waste concrete can be refined to realize resource recycling, it can not only reduce environmental pollution, protect the ecological environment, and meet the requirements of sustainable development; at the same time, it can save energy and reduce cost consumption. [0003] Aggregate is a granular loose material that acts as a skeleto...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: as we all know, when we chew some hard or hard-to-tear food, we need to use force on the upper and lower gums at the same time, and the upper and lower gums have the greatest chewing effect on food when the upper and lower gums are bitten in dislocation; State-of-the-art Jaw Crusher realizes crushing by only moving one jaw plate, but it is difficult to achieve good crushing effect on some materials with relatively high hardness.

This method has the following disadvantages: because there is a gap between the static cone and the moving cone, the gap is the crushing chamber and also the loading and unloading channel. In this way, some mineral materials fall through the gap before being crushed, which greatly affects the crushing efficiency. ; In the traditional shake-type crushing, there will always be a local area with a wide gap, which will also increase the probability of direct feeding of mineral materials

[0008] However, in the prior art, roller crushing and impeller knife rotary cutting are mostly used for crushing. The crushing effect of roller crushing only exists in the gap area between the pair of rollers, resulting in small processing capacity per unit time, slow work efficiency, and low work accuracy. However, the impeller knife rotary cutting has the disadvantages of greater damage to the impeller knife, the need to change the knife frequently, and the disadvantage of inconvenient blanking

In addition, most of the crushing in the prior art is a single-stage crushing method, which leads to low aggregate recovery efficiency of recycled concrete, so repeated crushing is required, resulting in poor flow of industrial operations

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