At present, developed countries have adopted waste concrete and stone waste materials to produce recycled aggregate technology, and its recycling rate of construction waste has reached 95%. The produced recycled aggregate has the same performance as natural aggregate and has higher purity. In recent years, my country’s technological innovation has been sufficient to support the recycling of construction waste. After the construction waste is collected in a centralized manner, it can be processed by the mobile jaw crushing station, sand and gravel production line, brick making machine, etc., to fully realize the various uses of construction waste. According to the existing technology, the available ways are mainly:
1. The construction waste is crushed and sorted into coarse and fine aggregates, which can replace natural aggregates to prepare concrete, road base materials and construction bricks;
2. Steel doors and windows, scrap steel bars, iron nails, cast iron pipes, black and white iron sheets are sorted and sent to non-ferrous metal smelters or steel plants for recycling and reuse;
3. The waste bricks and tiles can be reused after being cleaned up. After the waste ceramic tiles and ceramic sanitary ware are crushed and sorted, the ingredients are pressed to produce permeable floor tiles or sintered floor tiles;
4. The waste glass is screened and sent to a glass-ceramic factory or glass factory as a raw material to produce glass or glass-ceramic;
5. Wooden products such as wooden roof trusses, wooden doors and windows can be reused or processed to make medium-density fiberboards.
The mobile construction waste crusher is crushing equipment developed according to the characteristics of construction waste. It has the four functions of feeding, crushing, screening, and conveying. The equipment adopts a half-car body structure and can be driven into buildings. The garbage is crushed and screened inside. Multiple mobile crushers work together to process construction waste more efficiently. The quality of the recycled aggregate after treatment is very good, and the site is equipped with high-efficiency spray devices to strictly reduce dust pollution in the factory area and create an environmentally friendly and green construction waste crushing. On site, the economic benefits are more obvious.
The working steps are as follows:
1. Feeding: the construction waste is evenly put into the crusher by the feeder to avoid blockage.
2. Crushing: In the process of crushing by a crusher, the construction waste is crushed into materials of different sizes. The mobile construction waste crusher is multi-machine combination equipment. It can be combined with a variety of crushers, such as jaw crusher, impact crusher, cone crusher, hammer crusher, etc. The equipment is different, and the size of the crushed material it's different.
3. Impurity removal: the sorted construction waste will be removed from the iron material through specific iron removal equipment.
4. Reprocessing: The crushed construction waste can produce gravel and sand. According to different purposes, the coefficient of the crusher can be adjusted to produce particles of different sizes, which are finally applied to roadbed stones, non-burning bricks, and cement blending materials and other aspects.
Mobile crushers are relative to fixed crushers. They usually include tire-type mobile crushers and crawler-type mobile crushers. This series of mobile crushers is not only very convenient to move, more flexible to use, but also self-contained. With a complete set of crushing and screening equipment, the operation process is smoother and the technology is more advanced. Practice has proved that the use of mobile crushers can greatly improve the comprehensive recycling rate of construction waste and increase the renewable utilization rate. For the construction waste processing industry, it is an efficient and environmentally friendly treatment method.