Most of the construction waste in China is directly piled or landfilled in the open air without any treatment. This kind of treatment not only takes up a large amount of valuable land resources, but also wastes many building materials that can be recycled and used. At the same time, problems such as throwing, scattering, dripping, leaking, dust and flying dust in the process of clearing, transporting, and stacking are eliminated. It also increased environmental pollution.
Analysis of Economic Benefits
1. Bricks, stones, concrete and other wastes can be replaced by sand, used for building mortar, plastering mortar, and concrete cushions; Waste concrete can be finely crushed and used with standard mortar fines. Plastering the floor, leveling the roof with mortar, building mortar, making floor tiles, etc.
2. Discarded aggregates used in construction boards. The manufacture of partition wall plates not only has a high degree of gentleness, but also sound insulation and a small expansion coefficient. This makes it easier to obtain materials and lowers the cost of the plate material at a low price.
3. The abandoned concrete blocks can be used as concrete aggregates for cast-in-place or prefabricated aggregates for crushing of non-load-bearing parts. This will not only save construction funds, but will not reduce the strength of the construction.
4. The recyclable bricks that can be produced include partition walls, modular bricks, pavement bricks, permeable bricks, heat-insulating bricks, grass-planting bricks, and acoustic barrier boards. There are more than one hundred types of recycled bricks, and their performance indexes have reached or exceeded the national level and related standards.
Construction waste is not real rubbish, but is the misplaced“golden”. After sorting, removing or pulverizing construction waste, most of it can be reused as renewable resources such as waste steel, waste steel wire, scrap wire and other metals. After sorting, concentration and re-melting, it can be processed into various specifications of steel.
State's Encouragement Policy for Construction Waste Treatment
Government discounts and subsidies for construction waste projects.
In recent years, the phenomenon of garbage siege has become more and more serious, and the series of negative effects has caused continue to discredit the achievements of local governments. In order to solve these problems, governments have issued various policies and increased capital investment to require the disposal of construction waste. This will not only help the government solve the environmental problems, benefit the people and benefit the country, but also the government . The abundant funds make the enterprises benefit a lot and really make the construction waste treatment enterprises achieve a "win-win". In accordance with the relevant regulations, the newly-built, rebuilt or expanded new-type wall material companies and scientific research and development projects may declare special interest subsidy and subsidies to the competent authority of energy-saving wall reform.
Sorting section : Remove large pieces of raw materials ( wood, plastic, cloth, non-ferrous metals, cables, etc. )
De-ironing : Removal of residual iron metal in the concrete block and construction waste mixture.
Pre-screening process : Removing sand from raw materials.
Crushing process : Processing large-size raw materials into small-size recycled aggregates.
Sieving process : Classifying recycled aggregate according to particle size requirements.
Separation of light materials : Removal of large light materials in raw materials, such as paper, plastic, sawdust, etc.
Reprocessing section : A variety of module combinations can be used to produce a variety of green building materials such as recycled aggregate, commercial concrete, energy-saving walls and unburned bricks.
The Major Equipment
The major equipment of Construction & Demolition Recycling Line : Vibrating Feeder, Vibrating Screen, Jaw Crusher, Impact Crusher and Magnetic Separator.
Vibrating Feeder : It can be designed separately according to the user's requirements, specially manufacturing all types of feeders, stable feeding, reliable work, long service life.
Vibrating Screen : Reduces the phenomenon of clogging of sieve holes by the material, making the sieve have higher screening efficiency and productivity.
Jaw Crusher : High-strength material, advanced manufacturing process, higher structural strength, higher equipment reliability, larger crushing ratio, higher output, lower overall cost, etc.
Impact Crusher : Widely used to crush all kinds of soft and medium-hard ore, it can perform coarse crushing, medium crushing and fine crushing in primary crushing and secondary crushing.
Magnetic Separator : Removes iron powder in powdered granules and is suitable for wet magnetic separation of magnetite, pyrrhotite, roasted ore and ilmenite with a particle size of 3 mm or less. It is also used for coal and non-metal. Mine, building materials and other materials in addition to iron operations.